/usr/share/postgresql/9.4/extension/londiste--3.1.4--3.2.sql is in postgresql-9.4-pgq3 3.2-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 | -- Section: Londiste functions
-- upgrade schema
create or replace function londiste.upgrade_schema()
returns int4 as $$
-- updates table structure if necessary
declare
pgversion int;
cnt int4 = 0;
begin
show server_version_num into pgversion;
-- table_info: check (dropped_ddl is null or merge_state in ('in-copy', 'catching-up'))
perform 1 from information_schema.check_constraints
where constraint_schema = 'londiste'
and constraint_name = 'table_info_check'
and position('in-copy' in check_clause) > 0
and position('catching' in check_clause) = 0;
if found then
alter table londiste.table_info drop constraint table_info_check;
alter table londiste.table_info add constraint table_info_check
check (dropped_ddl is null or merge_state in ('in-copy', 'catching-up'));
cnt := cnt + 1;
end if;
-- table_info.dest_table
perform 1 from information_schema.columns
where table_schema = 'londiste'
and table_name = 'table_info'
and column_name = 'dest_table';
if not found then
alter table londiste.table_info add column dest_table text;
end if;
-- table_info: change trigger timing
if pgversion >= 90100 then
perform 1 from information_schema.triggers
where event_object_schema = 'londiste'
and event_object_table = 'table_info'
and trigger_name = 'table_info_trigger_sync'
and action_timing = 'AFTER';
else
perform 1 from information_schema.triggers
where event_object_schema = 'londiste'
and event_object_table = 'table_info'
and trigger_name = 'table_info_trigger_sync'
and condition_timing = 'AFTER';
end if;
if found then
drop trigger table_info_trigger_sync on londiste.table_info;
create trigger table_info_trigger_sync before delete on londiste.table_info
for each row execute procedure londiste.table_info_trigger();
end if;
-- applied_execute.dest_table
perform 1 from information_schema.columns
where table_schema = 'londiste'
and table_name = 'applied_execute'
and column_name = 'execute_attrs';
if not found then
alter table londiste.applied_execute add column execute_attrs text;
end if;
-- applied_execute: drop queue_name from primary key
perform 1 from pg_catalog.pg_indexes
where schemaname = 'londiste'
and tablename = 'applied_execute'
and indexname = 'applied_execute_pkey'
and indexdef like '%queue_name%';
if found then
alter table londiste.applied_execute
drop constraint applied_execute_pkey;
alter table londiste.applied_execute
add constraint applied_execute_pkey
primary key (execute_file);
end if;
-- applied_execute: drop fkey to pgq_node
perform 1 from information_schema.table_constraints
where constraint_schema = 'londiste'
and table_schema = 'londiste'
and table_name = 'applied_execute'
and constraint_type = 'FOREIGN KEY'
and constraint_name = 'applied_execute_queue_name_fkey';
if found then
alter table londiste.applied_execute
drop constraint applied_execute_queue_name_fkey;
end if;
-- create roles
perform 1 from pg_catalog.pg_roles where rolname = 'londiste_writer';
if not found then
create role londiste_writer in role pgq_admin;
cnt := cnt + 1;
end if;
perform 1 from pg_catalog.pg_roles where rolname = 'londiste_reader';
if not found then
create role londiste_reader in role pgq_reader;
cnt := cnt + 1;
end if;
return cnt;
end;
$$ language plpgsql;
select londiste.upgrade_schema();
-- Group: Information
create or replace function londiste.get_seq_list(
in i_queue_name text,
out seq_name text,
out last_value int8,
out local boolean)
returns setof record as $$
-- ----------------------------------------------------------------------
-- Function: londiste.get_seq_list(1)
--
-- Returns registered seqs on this Londiste node.
--
-- Result fiels:
-- seq_name - fully qualified name of sequence
-- last_value - last globally published value
-- local - is locally registered
-- ----------------------------------------------------------------------
declare
rec record;
begin
for seq_name, last_value, local in
select s.seq_name, s.last_value, s.local from londiste.seq_info s
where s.queue_name = i_queue_name
order by s.nr, s.seq_name
loop
return next;
end loop;
return;
end;
$$ language plpgsql strict;
drop function if exists londiste.get_table_list(text);
create or replace function londiste.get_table_list(
in i_queue_name text,
out table_name text,
out local boolean,
out merge_state text,
out custom_snapshot text,
out table_attrs text,
out dropped_ddl text,
out copy_role text,
out copy_pos int4,
out dest_table text)
returns setof record as $$
-- ----------------------------------------------------------------------
-- Function: londiste.get_table_list(1)
--
-- Return info about registered tables.
--
-- Parameters:
-- i_queue_name - cascaded queue name
--
-- Returns:
-- table_name - fully-quelified table name
-- local - does events needs to be applied to local table
-- merge_state - show phase of initial copy
-- custom_snapshot - remote snapshot of COPY transaction
-- table_attrs - urlencoded dict of table attributes
-- dropped_ddl - partition combining: temp place to put DDL
-- copy_role - partition combining: how to handle copy
-- copy_pos - position in parallel copy working order
--
-- copy_role = lead:
-- on copy start, drop indexes and store in dropped_ddl
-- on copy finish change state to catching-up, then wait until copy_role turns to NULL
-- catching-up: if dropped_ddl not NULL, restore them
-- copy_role = wait-copy:
-- on copy start wait, until role changes (to wait-replay)
-- copy_role = wait-replay:
-- on copy finish, tag as 'catching-up'
-- wait until copy_role is NULL, then proceed
-- ----------------------------------------------------------------------
begin
for table_name, local, merge_state, custom_snapshot, table_attrs,
dropped_ddl, dest_table
in
select t.table_name, t.local, t.merge_state, t.custom_snapshot, t.table_attrs,
t.dropped_ddl, t.dest_table
from londiste.table_info t
where t.queue_name = i_queue_name
order by t.nr, t.table_name
loop
copy_role := null;
copy_pos := 0;
if merge_state in ('in-copy', 'catching-up') then
select f.copy_role, f.copy_pos
from londiste._coordinate_copy(i_queue_name, table_name) f
into copy_role, copy_pos;
end if;
return next;
end loop;
return;
end;
$$ language plpgsql strict stable;
create or replace function londiste._coordinate_copy(
in i_queue_name text, in i_table_name text,
out copy_role text, out copy_pos int4)
as $$
-- if the table is in middle of copy from multiple partitions,
-- the copy processes need coordination.
declare
q_part1 text;
q_part_ddl text;
n_parts int4;
n_done int4;
_table_name text;
n_combined_queue text;
merge_state text;
dest_table text;
dropped_ddl text;
begin
copy_pos := 0;
copy_role := null;
select t.merge_state, t.dest_table, t.dropped_ddl,
min(case when t2.local then t2.queue_name else null end) as _queue1,
min(case when t2.local and t2.dropped_ddl is not null then t2.queue_name else null end) as _queue1ddl,
count(case when t2.local then t2.table_name else null end) as _total,
count(case when t2.local then nullif(t2.merge_state, 'in-copy') else null end) as _done,
min(n.combined_queue) as _combined_queue,
count(nullif(t2.queue_name < i_queue_name and t.merge_state = 'in-copy' and t2.merge_state = 'in-copy', false)) as _copy_pos
from londiste.table_info t
join pgq_node.node_info n on (n.queue_name = t.queue_name)
left join pgq_node.node_info n2 on (n2.combined_queue = n.combined_queue or
(n2.combined_queue is null and n.combined_queue is null))
left join londiste.table_info t2 on
(coalesce(t2.dest_table, t2.table_name) = coalesce(t.dest_table, t.table_name) and
t2.queue_name = n2.queue_name and
(t2.merge_state is null or t2.merge_state != 'ok'))
where t.queue_name = i_queue_name and t.table_name = i_table_name
group by t.nr, t.table_name, t.local, t.merge_state, t.custom_snapshot, t.table_attrs, t.dropped_ddl, t.dest_table
into merge_state, dest_table, dropped_ddl, q_part1, q_part_ddl, n_parts, n_done, n_combined_queue, copy_pos;
-- q_part1, q_part_ddl, n_parts, n_done, n_combined_queue, copy_pos, dest_table
-- be more robust against late joiners
q_part1 := coalesce(q_part_ddl, q_part1);
-- turn the logic off if no merge is happening
if n_parts = 1 then
q_part1 := null;
end if;
if q_part1 is not null then
if i_queue_name = q_part1 then
-- lead
if merge_state = 'in-copy' then
if dropped_ddl is null and n_done > 0 then
-- seems late addition, let it copy with indexes
copy_role := 'wait-replay';
elsif n_done < n_parts then
-- show copy_role only if need to drop ddl or already did drop ddl
copy_role := 'lead';
end if;
-- make sure it cannot be made to wait
copy_pos := 0;
end if;
if merge_state = 'catching-up' and dropped_ddl is not null then
-- show copy_role only if need to wait for others
if n_done < n_parts then
copy_role := 'wait-replay';
end if;
end if;
else
-- follow
if merge_state = 'in-copy' then
if q_part_ddl is not null then
-- can copy, wait in replay until lead has applied ddl
copy_role := 'wait-replay';
elsif n_done > 0 then
-- ddl is not dropped, others are active, copy without touching ddl
copy_role := 'wait-replay';
else
-- wait for lead to drop ddl
copy_role := 'wait-copy';
end if;
elsif merge_state = 'catching-up' then
-- show copy_role only if need to wait for lead
if q_part_ddl is not null then
copy_role := 'wait-replay';
end if;
end if;
end if;
end if;
return;
end;
$$ language plpgsql strict stable;
create or replace function londiste.local_show_missing(
in i_queue_name text,
out obj_kind text, out obj_name text)
returns setof record as $$
-- ----------------------------------------------------------------------
-- Function: londiste.local_show_missing(1)
--
-- Return info about missing tables. On root show tables
-- not registered on set, on branch/leaf show tables
-- in set but not registered locally.
-- ----------------------------------------------------------------------
begin
if pgq_node.is_root_node(i_queue_name) then
for obj_kind, obj_name in
select r.relkind, n.nspname || '.' || r.relname
from pg_catalog.pg_class r, pg_catalog.pg_namespace n
where n.oid = r.relnamespace
and r.relkind in ('r', 'S')
and n.nspname not in ('pgq', 'pgq_ext', 'pgq_node', 'londiste', 'pg_catalog', 'information_schema')
and n.nspname !~ '^pg_(toast|temp)'
and not exists (select 1 from londiste.table_info
where queue_name = i_queue_name and local
and coalesce(dest_table, table_name) = (n.nspname || '.' || r.relname))
order by 1, 2
loop
return next;
end loop;
else
for obj_kind, obj_name in
select 'S', s.seq_name from londiste.seq_info s
where s.queue_name = i_queue_name
and not s.local
union all
select 'r', t.table_name from londiste.table_info t
where t.queue_name = i_queue_name
and not t.local
order by 1, 2
loop
return next;
end loop;
end if;
return;
end;
$$ language plpgsql strict stable;
-- Group: Local object registration (setup tool)
create or replace function londiste.local_add_seq(
in i_queue_name text, in i_seq_name text,
out ret_code int4, out ret_note text)
as $$
-- ----------------------------------------------------------------------
-- Function: londiste.local_add_seq(2)
--
-- Register sequence.
--
-- Parameters:
-- i_queue_name - cascaded queue name
-- i_seq_name - seq name
--
-- Returns:
-- 200 - OK
-- 400 - Not found
-- ----------------------------------------------------------------------
declare
fq_seq_name text;
lastval int8;
seq record;
begin
fq_seq_name := londiste.make_fqname(i_seq_name);
perform 1 from pg_class
where oid = londiste.find_seq_oid(fq_seq_name);
if not found then
select 400, 'Sequence not found: ' || fq_seq_name into ret_code, ret_note;
return;
end if;
if pgq_node.is_root_node(i_queue_name) then
select local, last_value into seq
from londiste.seq_info
where queue_name = i_queue_name
and seq_name = fq_seq_name
for update;
if found and seq.local then
select 201, 'Sequence already added: ' || fq_seq_name
into ret_code, ret_note;
return;
end if;
if not seq.local then
update londiste.seq_info set local = true
where queue_name = i_queue_name and seq_name = fq_seq_name;
else
insert into londiste.seq_info (queue_name, seq_name, local, last_value)
values (i_queue_name, fq_seq_name, true, 0);
end if;
perform * from londiste.root_check_seqs(i_queue_name);
else
select local, last_value into seq
from londiste.seq_info
where queue_name = i_queue_name
and seq_name = fq_seq_name
for update;
if not found then
select 404, 'Unknown sequence: ' || fq_seq_name
into ret_code, ret_note;
return;
end if;
if seq.local then
select 201, 'Sequence already added: ' || fq_seq_name
into ret_code, ret_note;
return;
end if;
update londiste.seq_info set local = true
where queue_name = i_queue_name and seq_name = fq_seq_name;
perform pgq.seq_setval(fq_seq_name, seq.last_value);
end if;
select 200, 'Sequence added: ' || fq_seq_name into ret_code, ret_note;
return;
end;
$$ language plpgsql;
create or replace function londiste.create_trigger(
in i_queue_name text,
in i_table_name text,
in i_trg_args text[],
in i_dest_table text,
in i_node_type text,
out ret_code int4,
out ret_note text,
out trigger_name text)
as $$
------------------------------------------------------------------------
-- Function: londiste.create_trigger(5)
--
-- Create or replace londiste trigger(s)
--
-- Parameters:
-- i_queue_name - queue name
-- i_table_name - table name
-- i_trg_args - args to trigger
-- i_dest_table - actual name of destination table (NULL if same as src)
-- i_node_type - l3 node type
--
-- Trigger args:
-- See documentation for pgq triggers.
--
-- Trigger creation flags (default: AIUDL):
-- I - ON INSERT
-- U - ON UPDATE
-- D - ON DELETE
-- Q - use pgq.sqltriga() as trigger function
-- L - use pgq.logutriga() as trigger function
-- B - BEFORE
-- A - AFTER
-- S - SKIP
--
-- Returns:
-- 200 - Ok
-- 201 - Trigger not created
-- 405 - Multiple SKIP triggers
--
------------------------------------------------------------------------
declare
trigger_name text;
lg_func text;
lg_pos text;
lg_event text;
lg_args text[];
_old_tgargs bytea;
_new_tgargs bytea;
trunctrg_name text;
pgversion int;
sql text;
arg text;
i integer;
_extra_args text[] := '{}';
-- skip trigger
_skip_prefix text := 'zzz_';
_skip_trg_count integer;
_skip_trg_name text;
-- given tgflags array
_tgflags char[];
-- ordinary argument array
_args text[];
-- array with all valid tgflags values
_valid_flags char[] := array['B','A','Q','L','I','U','D','S'];
-- argument flags
_skip boolean := false;
_no_triggers boolean := false;
_got_extra1 boolean := false;
begin
-- parse trigger args
if array_lower(i_trg_args, 1) is not null then
for i in array_lower(i_trg_args, 1) .. array_upper(i_trg_args, 1) loop
arg := i_trg_args[i];
if arg like 'tgflags=%' then
-- special flag handling
arg := upper(substr(arg, 9));
for j in array_lower(_valid_flags, 1) .. array_upper(_valid_flags, 1) loop
if position(_valid_flags[j] in arg) > 0 then
_tgflags := array_append(_tgflags, _valid_flags[j]);
end if;
end loop;
elsif arg = 'no_triggers' then
_no_triggers := true;
elsif lower(arg) = 'skip' then
_skip := true;
elsif arg = 'virtual_table' then
_no_triggers := true; -- do not create triggers
elsif arg not in ('expect_sync', 'skip_truncate', 'merge_all', 'no_merge') then -- ignore add-table args
if arg like 'ev_extra1=%' then
_got_extra1 := true;
end if;
-- ordinary arg
_args = array_append(_args, quote_literal(arg));
end if;
end loop;
end if;
if i_dest_table <> i_table_name and not _got_extra1 then
-- if renamed table, enforce trigger to put
-- global table name into extra1
arg := 'ev_extra1=' || quote_literal(i_table_name);
_args := array_append(_args, quote_literal(arg));
end if;
trigger_name := '_londiste_' || i_queue_name;
lg_func := 'pgq.logutriga';
lg_event := '';
lg_args := array[quote_literal(i_queue_name)];
lg_pos := 'after';
if array_lower(_args, 1) is not null then
lg_args := lg_args || _args;
end if;
if 'B' = any(_tgflags) then
lg_pos := 'before';
end if;
if 'A' = any(_tgflags) then
lg_pos := 'after';
end if;
if 'Q' = any(_tgflags) then
lg_func := 'pgq.sqltriga';
end if;
if 'L' = any(_tgflags) then
lg_func := 'pgq.logutriga';
end if;
if 'I' = any(_tgflags) then
lg_event := lg_event || ' or insert';
end if;
if 'U' = any(_tgflags) then
lg_event := lg_event || ' or update';
end if;
if 'D' = any(_tgflags) then
lg_event := lg_event || ' or delete';
end if;
if 'S' = any(_tgflags) then
_skip := true;
end if;
if i_node_type = 'leaf' then
-- on weird leafs the trigger funcs may not exist
perform 1 from pg_proc p join pg_namespace n on (n.oid = p.pronamespace)
where n.nspname = 'pgq' and p.proname in ('logutriga', 'sqltriga');
if not found then
select 201, 'Trigger not created' into ret_code, ret_note;
return;
end if;
-- on regular leaf, install deny trigger
_extra_args := array_append(_extra_args, quote_literal('deny'));
end if;
if _skip or lg_pos = 'after' then
-- get count and name of existing skip triggers
select count(*), min(t.tgname)
into _skip_trg_count, _skip_trg_name
from pg_catalog.pg_trigger t
where t.tgrelid = londiste.find_table_oid(i_dest_table)
and position(E'\\000SKIP\\000'::bytea in tgargs) > 0;
end if;
-- make sure new trigger won't be effectively inactive
if lg_pos = 'after' and _skip_trg_count > 0 then
select 403, 'AFTER trigger cannot work with SKIP trigger(s)'
into ret_code, ret_note;
return;
end if;
-- if skip param given, rename previous skip triggers and prefix current
if _skip then
-- if no previous skip triggers, prefix name and add SKIP to args
if _skip_trg_count = 0 then
trigger_name := _skip_prefix || trigger_name;
lg_args := array_append(lg_args, quote_literal('SKIP'));
-- if one previous skip trigger, check it's prefix and
-- do not use SKIP on current trigger
elsif _skip_trg_count = 1 then
-- if not prefixed then rename
if position(_skip_prefix in _skip_trg_name) != 1 then
sql := 'alter trigger ' || _skip_trg_name
|| ' on ' || londiste.quote_fqname(i_dest_table)
|| ' rename to ' || _skip_prefix || _skip_trg_name;
execute sql;
end if;
else
select 405, 'Multiple SKIP triggers'
into ret_code, ret_note;
return;
end if;
end if;
-- create Ins/Upd/Del trigger if it does not exists already
select t.tgargs
from pg_catalog.pg_trigger t
where t.tgrelid = londiste.find_table_oid(i_dest_table)
and t.tgname = trigger_name
into _old_tgargs;
if found then
_new_tgargs := decode(lg_args[1], 'escape');
for i in 2 .. array_upper(lg_args, 1) loop
_new_tgargs := _new_tgargs || E'\\000'::bytea || decode(lg_args[i], 'escape');
end loop;
if _old_tgargs is distinct from _new_tgargs then
sql := 'drop trigger if exists ' || quote_ident(trigger_name)
|| ' on ' || londiste.quote_fqname(i_dest_table);
execute sql;
end if;
end if;
if not found or _old_tgargs is distinct from _new_tgargs then
if _no_triggers then
select 201, 'Trigger not created'
into ret_code, ret_note;
return;
end if;
-- finalize event
lg_event := substr(lg_event, 4); -- remove ' or '
if lg_event = '' then
lg_event := 'insert or update or delete';
end if;
-- create trigger
lg_args := lg_args || _extra_args;
sql := 'create trigger ' || quote_ident(trigger_name)
|| ' ' || lg_pos || ' ' || lg_event
|| ' on ' || londiste.quote_fqname(i_dest_table)
|| ' for each row execute procedure '
|| lg_func || '(' || array_to_string(lg_args, ', ') || ')';
execute sql;
end if;
-- create truncate trigger if it does not exists already
show server_version_num into pgversion;
if pgversion >= 80400 then
trunctrg_name := '_londiste_' || i_queue_name || '_truncate';
perform 1 from pg_catalog.pg_trigger
where tgrelid = londiste.find_table_oid(i_dest_table)
and tgname = trunctrg_name;
if not found then
_extra_args := quote_literal(i_queue_name) || _extra_args;
sql := 'create trigger ' || quote_ident(trunctrg_name)
|| ' after truncate on ' || londiste.quote_fqname(i_dest_table)
|| ' for each statement execute procedure pgq.sqltriga('
|| array_to_string(_extra_args, ', ') || ')';
execute sql;
end if;
end if;
select 200, 'OK'
into ret_code, ret_note;
return;
end;
$$ language plpgsql;
create or replace function londiste.local_add_table(
in i_queue_name text,
in i_table_name text,
in i_trg_args text[],
in i_table_attrs text,
in i_dest_table text,
out ret_code int4,
out ret_note text)
as $$
-- ----------------------------------------------------------------------
-- Function: londiste.local_add_table(5)
--
-- Register table on Londiste node, with customizable trigger args.
--
-- Parameters:
-- i_queue_name - queue name
-- i_table_name - table name
-- i_trg_args - args to trigger, or magic parameters.
-- i_table_attrs - args to python handler
-- i_dest_table - actual name of destination table (NULL if same)
--
-- Trigger args:
-- See documentation for pgq triggers.
--
-- Magic parameters:
-- no_triggers - skip trigger creation
-- skip_truncate - set 'skip_truncate' table attribute
-- expect_sync - set table state to 'ok'
-- tgflags=X - trigger creation flags
-- merge_all - merge table from all sources. required for
-- multi-source table
-- no_merge - do not merge tables from different sources
-- skip - create skip trigger. same as S flag
-- virtual_table - skips structure check and trigger creation
--
-- Trigger creation flags (default: AIUDL):
-- I - ON INSERT
-- U - ON UPDATE
-- D - ON DELETE
-- Q - use pgq.sqltriga() as trigger function
-- L - use pgq.logutriga() as trigger function
-- B - BEFORE
-- A - AFTER
-- S - SKIP
--
-- Example:
-- > londiste.local_add_table('q', 'tbl', array['tgflags=BI', 'SKIP', 'pkey=col1,col2'])
--
-- Returns:
-- 200 - Ok
-- 301 - Warning, trigger exists that will fire before londiste one
-- 400 - No such set
-- 410 - Table already exists but with different table_attrs
------------------------------------------------------------------------
declare
col_types text;
fq_table_name text;
new_state text;
pgversion int;
logtrg_previous text;
trigger_name text;
tbl record;
i integer;
j integer;
arg text;
_node record;
_tbloid oid;
_combined_queue text;
_combined_table text;
_table_attrs text := i_table_attrs;
-- check local tables from all sources
_queue_name text;
_local boolean;
-- argument flags
_expect_sync boolean := false;
_merge_all boolean := false;
_no_merge boolean := false;
_virtual_table boolean := false;
_dest_table text;
_table_name2 text;
_desc text;
begin
-------- i_trg_args ARGUMENTS PARSING (TODO: use different input param for passing extra options that have nothing to do with trigger)
if array_lower(i_trg_args, 1) is not null then
for i in array_lower(i_trg_args, 1) .. array_upper(i_trg_args, 1) loop
arg := i_trg_args[i];
if arg = 'expect_sync' then
_expect_sync := true;
elsif arg = 'skip_truncate' then
_table_attrs := coalesce(_table_attrs || '&skip_truncate=1', 'skip_truncate=1');
elsif arg = 'merge_all' then
_merge_all = true;
elsif arg = 'no_merge' then
_no_merge = true;
elsif arg = 'virtual_table' then
_virtual_table := true;
_expect_sync := true; -- do not copy
end if;
end loop;
end if;
if _merge_all and _no_merge then
select 405, 'Cannot use merge-all and no-merge together'
into ret_code, ret_note;
return;
end if;
fq_table_name := londiste.make_fqname(i_table_name);
_dest_table := londiste.make_fqname(coalesce(i_dest_table, i_table_name));
if _dest_table = fq_table_name then
_desc := fq_table_name;
else
_desc := fq_table_name || '(' || _dest_table || ')';
end if;
-------- TABLE STRUCTURE CHECK
if not _virtual_table then
_tbloid := londiste.find_table_oid(_dest_table);
if _tbloid is null then
select 404, 'Table does not exist: ' || _desc into ret_code, ret_note;
return;
end if;
col_types := londiste.find_column_types(_dest_table);
if position('k' in col_types) < 1 then
-- allow missing primary key in case of combined table where
-- pkey was removed by londiste
perform 1 from londiste.table_info t,
pgq_node.node_info n_this,
pgq_node.node_info n_other
where n_this.queue_name = i_queue_name
and n_other.combined_queue = n_this.combined_queue
and n_other.queue_name <> n_this.queue_name
and t.queue_name = n_other.queue_name
and coalesce(t.dest_table, t.table_name) = _dest_table
and t.dropped_ddl is not null;
if not found then
select 400, 'Primary key missing on table: ' || _desc into ret_code, ret_note;
return;
end if;
end if;
end if;
-------- TABLE REGISTRATION LOGIC
select * from pgq_node.get_node_info(i_queue_name) into _node;
if not found or _node.ret_code >= 400 then
select 400, 'No such set: ' || i_queue_name into ret_code, ret_note;
return;
end if;
select merge_state, local, table_attrs into tbl
from londiste.table_info
where queue_name = i_queue_name and table_name = fq_table_name;
if not found then
-- add to set on root
if _node.node_type = 'root' then
select f.ret_code, f.ret_note into ret_code, ret_note
from londiste.global_add_table(i_queue_name, i_table_name) f;
if ret_code <> 200 then
return;
end if;
else
select 404, 'Table not available on queue: ' || _desc
into ret_code, ret_note;
return;
end if;
-- reload info
select merge_state, local, table_attrs into tbl
from londiste.table_info
where queue_name = i_queue_name and table_name = fq_table_name;
end if;
if tbl.local then
if tbl.table_attrs is distinct from _table_attrs then
select 410, 'Table ' || _desc || ' already added, but with different args: ' || coalesce(tbl.table_attrs, '') into ret_code, ret_note;
else
select 200, 'Table already added: ' || _desc into ret_code, ret_note;
end if;
return;
end if;
if _node.node_type = 'root' then
new_state := 'ok';
perform londiste.root_notify_change(i_queue_name, 'londiste.add-table', fq_table_name);
elsif _node.node_type = 'leaf' and _node.combined_type = 'branch' then
new_state := 'ok';
elsif _expect_sync then
new_state := 'ok';
else
new_state := NULL;
end if;
update londiste.table_info
set local = true,
merge_state = new_state,
table_attrs = coalesce(_table_attrs, table_attrs),
dest_table = nullif(_dest_table, fq_table_name)
where queue_name = i_queue_name and table_name = fq_table_name;
if not found then
raise exception 'lost table: %', fq_table_name;
end if;
-- merge all table sources on leaf
if _node.node_type = 'leaf' and not _no_merge then
for _queue_name, _table_name2, _local in
select t2.queue_name, t2.table_name, t2.local
from londiste.table_info t
join pgq_node.node_info n on (n.queue_name = t.queue_name)
left join pgq_node.node_info n2 on (n2.combined_queue = n.combined_queue or
(n2.combined_queue is null and n.combined_queue is null))
left join londiste.table_info t2
on (t2.queue_name = n2.queue_name and
coalesce(t2.dest_table, t2.table_name) = coalesce(t.dest_table, t.table_name))
where t.queue_name = i_queue_name
and t.table_name = fq_table_name
and t2.queue_name != i_queue_name -- skip self
loop
-- if table from some other source is already marked as local,
-- raise error
if _local and coalesce(new_state, 'x') <> 'ok' then
select 405, 'Found local table '|| _desc
|| ' in queue ' || _queue_name
|| ', use remove-table first to remove all previous '
|| 'table subscriptions'
into ret_code, ret_note;
return;
end if;
-- when table comes from multiple sources, merge_all switch is
-- required
if not _merge_all and coalesce(new_state, 'x') <> 'ok' then
select 405, 'Found multiple sources for table '|| _desc
|| ', use merge-all or no-merge to continue'
into ret_code, ret_note;
return;
end if;
update londiste.table_info
set local = true,
merge_state = new_state,
table_attrs = coalesce(_table_attrs, table_attrs)
where queue_name = _queue_name and table_name = _table_name2;
if not found then
raise exception 'lost table: % on queue %', _table_name2, _queue_name;
end if;
end loop;
-- if this node has combined_queue, add table there too
-- note: we need to keep both table_name/dest_table values
select n2.queue_name, t.table_name
from pgq_node.node_info n1
join pgq_node.node_info n2
on (n2.queue_name = n1.combined_queue)
left join londiste.table_info t
on (t.queue_name = n2.queue_name and t.table_name = fq_table_name and t.local)
where n1.queue_name = i_queue_name and n2.node_type = 'root'
into _combined_queue, _combined_table;
if found and _combined_table is null then
select f.ret_code, f.ret_note
from londiste.local_add_table(_combined_queue, fq_table_name, i_trg_args, _table_attrs, _dest_table) f
into ret_code, ret_note;
if ret_code >= 300 then
return;
end if;
end if;
end if;
-- create trigger
select f.ret_code, f.ret_note, f.trigger_name
from londiste.create_trigger(i_queue_name, fq_table_name, i_trg_args, _dest_table, _node.node_type) f
into ret_code, ret_note, trigger_name;
if ret_code > 299 then
ret_note := 'Trigger creation failed for table ' || _desc || ': ' || ret_note;
return;
elsif ret_code = 201 then
select 200, 'Table added with no triggers: ' || _desc
into ret_code, ret_note;
return;
end if;
-- Check that no trigger exists on the target table that will get fired
-- before londiste one (this could have londiste replicate data out-of-order)
--
-- Don't report all the trigger names, 8.3 does not have array_accum available.
show server_version_num into pgversion;
if pgversion >= 90000 then
select tg.tgname into logtrg_previous
from pg_class r join pg_trigger tg on (tg.tgrelid = r.oid)
where r.oid = londiste.find_table_oid(_dest_table)
and not tg.tgisinternal
and tg.tgname < trigger_name::name
-- per-row AFTER trigger
and (tg.tgtype & 3) = 1 -- bits: 0:ROW, 1:BEFORE
-- current londiste
and not londiste.is_replica_func(tg.tgfoid)
-- old londiste
and substring(tg.tgname from 1 for 10) != '_londiste_'
and substring(tg.tgname from char_length(tg.tgname) - 6) != '_logger'
order by 1 limit 1;
else
select tg.tgname into logtrg_previous
from pg_class r join pg_trigger tg on (tg.tgrelid = r.oid)
where r.oid = londiste.find_table_oid(_dest_table)
and not tg.tgisconstraint
and tg.tgname < trigger_name::name
-- per-row AFTER trigger
and (tg.tgtype & 3) = 1 -- bits: 0:ROW, 1:BEFORE
-- current londiste
and not londiste.is_replica_func(tg.tgfoid)
-- old londiste
and substring(tg.tgname from 1 for 10) != '_londiste_'
and substring(tg.tgname from char_length(tg.tgname) - 6) != '_logger'
order by 1 limit 1;
end if;
if logtrg_previous is not null then
select 301,
'Table added: ' || _desc
|| ', but londiste trigger is not first: '
|| logtrg_previous
into ret_code, ret_note;
return;
end if;
select 200, 'Table added: ' || _desc into ret_code, ret_note;
return;
end;
$$ language plpgsql;
create or replace function londiste.local_add_table(
in i_queue_name text,
in i_table_name text,
in i_trg_args text[],
in i_table_attrs text,
out ret_code int4,
out ret_note text)
as $$
-- ----------------------------------------------------------------------
-- Function: londiste.local_add_table(4)
--
-- Register table on Londiste node.
-- ----------------------------------------------------------------------
begin
select f.ret_code, f.ret_note into ret_code, ret_note
from londiste.local_add_table(i_queue_name, i_table_name, i_trg_args, i_table_attrs, null) f;
return;
end;
$$ language plpgsql;
create or replace function londiste.local_add_table(
in i_queue_name text,
in i_table_name text,
in i_trg_args text[],
out ret_code int4,
out ret_note text)
as $$
-- ----------------------------------------------------------------------
-- Function: londiste.local_add_table(3)
--
-- Register table on Londiste node.
-- ----------------------------------------------------------------------
begin
select f.ret_code, f.ret_note into ret_code, ret_note
from londiste.local_add_table(i_queue_name, i_table_name, i_trg_args, null) f;
return;
end;
$$ language plpgsql;
create or replace function londiste.local_add_table(
in i_queue_name text,
in i_table_name text,
out ret_code int4,
out ret_note text)
as $$
-- ----------------------------------------------------------------------
-- Function: londiste.local_add_table(2)
--
-- Register table on Londiste node.
-- ----------------------------------------------------------------------
begin
select f.ret_code, f.ret_note into ret_code, ret_note
from londiste.local_add_table(i_queue_name, i_table_name, null) f;
return;
end;
$$ language plpgsql strict;
create or replace function londiste.local_change_handler(
in i_queue_name text,
in i_table_name text,
in i_trg_args text[],
in i_table_attrs text,
out ret_code int4,
out ret_note text)
as $$
----------------------------------------------------------------------------------------------------
-- Function: londiste.local_change_handler(4)
--
-- Change handler and rebuild trigger if needed
--
-- Parameters:
-- i_queue_name - set name
-- i_table_name - table name
-- i_trg_args - args to trigger
-- i_table_attrs - args to python handler
--
-- Returns:
-- 200 - OK
-- 400 - No such set
-- 404 - Table not found
--
----------------------------------------------------------------------------------------------------
declare
_dest_table text;
_desc text;
_node record;
begin
-- get node info
select * from pgq_node.get_node_info(i_queue_name) into _node;
if not found or _node.ret_code >= 400 then
select 400, 'No such set: ' || i_queue_name into ret_code, ret_note;
return;
end if;
-- update table_attrs with new handler info
select f.ret_code, f.ret_note
from londiste.local_set_table_attrs(i_queue_name, i_table_name, i_table_attrs) f
into ret_code, ret_note;
if ret_code <> 200 then
return;
end if;
-- get destination table name for use in trigger creation
select coalesce(ti.dest_table, i_table_name)
from londiste.table_info ti
where queue_name = i_queue_name
and table_name = i_table_name
and local
into _dest_table;
-- replace the trigger if needed
select f.ret_code, f.ret_note
from londiste.create_trigger(i_queue_name, i_table_name, i_trg_args, _dest_table, _node.node_type) f
into ret_code, ret_note;
if _dest_table = i_table_name then
_desc := i_table_name;
else
_desc := i_table_name || '(' || _dest_table || ')';
end if;
if ret_code > 299 then
ret_note := 'Trigger creation failed for table ' || _desc || ': ' || ret_note;
return;
elsif ret_code = 201 then
select 200, 'Table handler updated with no triggers: ' || _desc
into ret_code, ret_note;
return;
end if;
select 200, 'Handler changed for table: ' || _desc
into ret_code, ret_note;
return;
end;
$$ language plpgsql;
create or replace function londiste.local_remove_seq(
in i_queue_name text, in i_seq_name text,
out ret_code int4, out ret_note text)
as $$
-- ----------------------------------------------------------------------
-- Function: londiste.local_remove_seq(2)
--
-- Remove sequence.
--
-- Parameters:
-- i_queue_name - set name
-- i_seq_name - sequence name
--
-- Returns:
-- 200 - OK
-- 404 - Sequence not found
-- ----------------------------------------------------------------------
declare
fqname text;
begin
fqname := londiste.make_fqname(i_seq_name);
if pgq_node.is_root_node(i_queue_name) then
select f.ret_code, f.ret_note
into ret_code, ret_note
from londiste.global_remove_seq(i_queue_name, fqname) f;
return;
end if;
update londiste.seq_info
set local = false
where queue_name = i_queue_name
and seq_name = fqname
and local;
if not found then
select 404, 'Sequence not found: '||fqname into ret_code, ret_note;
return;
end if;
select 200, 'Sequence removed: '||fqname into ret_code, ret_note;
return;
end;
$$ language plpgsql strict;
create or replace function londiste.local_remove_table(
in i_queue_name text, in i_table_name text,
out ret_code int4, out ret_note text)
as $$
-- ----------------------------------------------------------------------
-- Function: londiste.local_remove_table(2)
--
-- Remove table.
--
-- Parameters:
-- i_queue_name - set name
-- i_table_name - table name
--
-- Returns:
-- 200 - OK
-- 404 - Table not found
-- ----------------------------------------------------------------------
declare
fq_table_name text;
qtbl text;
seqname text;
tbl record;
tbl_oid oid;
pgver integer;
begin
fq_table_name := londiste.make_fqname(i_table_name);
qtbl := londiste.quote_fqname(fq_table_name);
tbl_oid := londiste.find_table_oid(i_table_name);
show server_version_num into pgver;
select local, dropped_ddl, merge_state into tbl
from londiste.table_info
where queue_name = i_queue_name
and table_name = fq_table_name
for update;
if not found then
select 400, 'Table not found: ' || fq_table_name into ret_code, ret_note;
return;
end if;
if tbl.local then
perform londiste.drop_table_triggers(i_queue_name, fq_table_name);
-- restore dropped ddl
if tbl.dropped_ddl is not null then
-- table is not synced, drop data to make restore faster
if pgver >= 80400 then
execute 'TRUNCATE ONLY ' || qtbl;
else
execute 'TRUNCATE ' || qtbl;
end if;
execute tbl.dropped_ddl;
end if;
-- reset data
update londiste.table_info
set local = false,
custom_snapshot = null,
table_attrs = null,
dropped_ddl = null,
merge_state = null,
dest_table = null
where queue_name = i_queue_name
and table_name = fq_table_name;
-- drop dependent sequence
for seqname in
select n.nspname || '.' || s.relname
from pg_catalog.pg_class s,
pg_catalog.pg_namespace n,
pg_catalog.pg_attribute a
where a.attrelid = tbl_oid
and a.atthasdef
and a.atttypid::regtype::text in ('integer', 'bigint')
and s.oid = pg_get_serial_sequence(qtbl, a.attname)::regclass::oid
and n.oid = s.relnamespace
loop
perform londiste.local_remove_seq(i_queue_name, seqname);
end loop;
else
if not pgq_node.is_root_node(i_queue_name) then
select 400, 'Table not registered locally: ' || fq_table_name into ret_code, ret_note;
return;
end if;
end if;
if pgq_node.is_root_node(i_queue_name) then
perform londiste.global_remove_table(i_queue_name, fq_table_name);
perform londiste.root_notify_change(i_queue_name, 'londiste.remove-table', fq_table_name);
end if;
select 200, 'Table removed: ' || fq_table_name into ret_code, ret_note;
return;
end;
$$ language plpgsql strict;
-- Group: Global object registrations (internal)
create or replace function londiste.global_add_table(
in i_queue_name text,
in i_table_name text,
out ret_code int4,
out ret_note text)
as $$
-- ----------------------------------------------------------------------
-- Function: londiste.global_add_table(2)
--
-- Register table on Londiste set.
--
-- This means its available from root, events for it appear
-- in queue and nodes can attach to it.
--
-- Called by:
-- on root - londiste.local_add_table()
-- elsewhere - londiste consumer when receives new table event
--
-- Returns:
-- 200 - Ok
-- 400 - No such set
-- ----------------------------------------------------------------------
declare
fq_table_name text;
_cqueue text;
begin
fq_table_name := londiste.make_fqname(i_table_name);
select combined_queue into _cqueue
from pgq_node.node_info
where queue_name = i_queue_name
for update;
if not found then
select 400, 'No such queue: ' || i_queue_name into ret_code, ret_note;
return;
end if;
perform 1 from londiste.table_info where queue_name = i_queue_name and table_name = fq_table_name;
if found then
select 200, 'Table already added: ' || fq_table_name into ret_code, ret_note;
return;
end if;
insert into londiste.table_info (queue_name, table_name)
values (i_queue_name, fq_table_name);
select 200, 'Table added: ' || i_table_name
into ret_code, ret_note;
-- let the combined node know about it too
if _cqueue is not null then
perform londiste.global_add_table(_cqueue, i_table_name);
end if;
return;
exception
-- seems the row was added from parallel connection (setup vs. replay)
when unique_violation then
select 200, 'Table already added: ' || i_table_name
into ret_code, ret_note;
return;
end;
$$ language plpgsql strict;
create or replace function londiste.global_remove_table(
in i_queue_name text, in i_table_name text,
out ret_code int4, out ret_note text)
as $$
-- ----------------------------------------------------------------------
-- Function: londiste.global_remove_table(2)
--
-- Removes tables registration in set.
--
-- Means that nodes cannot attach to this table anymore.
--
-- Called by:
-- - On root by londiste.local_remove_table()
-- - Elsewhere by consumer receiving table remove event
--
-- Returns:
-- 200 - OK
-- 400 - not found
-- ----------------------------------------------------------------------
declare
fq_table_name text;
begin
fq_table_name := londiste.make_fqname(i_table_name);
if not pgq_node.is_root_node(i_queue_name) then
perform londiste.local_remove_table(i_queue_name, fq_table_name);
end if;
delete from londiste.table_info
where queue_name = i_queue_name
and table_name = fq_table_name;
if not found then
select 400, 'Table not found: ' || fq_table_name
into ret_code, ret_note;
return;
end if;
select 200, 'Table removed: ' || i_table_name
into ret_code, ret_note;
return;
end;
$$ language plpgsql strict;
create or replace function londiste.global_update_seq(
in i_queue_name text, in i_seq_name text, in i_value int8,
out ret_code int4, out ret_note text)
as $$
-- ----------------------------------------------------------------------
-- Function: londiste.global_update_seq(3)
--
-- Update seq.
--
-- Parameters:
-- i_queue_name - set name
-- i_seq_name - seq name
-- i_value - new published value
--
-- Returns:
-- 200 - OK
-- ----------------------------------------------------------------------
declare
n record;
fqname text;
seq record;
begin
select node_type, node_name into n
from pgq_node.node_info
where queue_name = i_queue_name;
if not found then
select 404, 'Set not found: ' || i_queue_name into ret_code, ret_note;
return;
end if;
if n.node_type = 'root' then
select 402, 'Must not run on root node' into ret_code, ret_note;
return;
end if;
fqname := londiste.make_fqname(i_seq_name);
select last_value, local from londiste.seq_info
into seq
where queue_name = i_queue_name and seq_name = fqname
for update;
if not found then
insert into londiste.seq_info
(queue_name, seq_name, last_value)
values (i_queue_name, fqname, i_value);
else
update londiste.seq_info
set last_value = i_value
where queue_name = i_queue_name and seq_name = fqname;
if seq.local then
perform pgq.seq_setval(fqname, i_value);
end if;
end if;
select 200, 'Sequence updated' into ret_code, ret_note;
return;
end;
$$ language plpgsql;
create or replace function londiste.global_remove_seq(
in i_queue_name text, in i_seq_name text,
out ret_code int4, out ret_note text)
as $$
-- ----------------------------------------------------------------------
-- Function: londiste.global_remove_seq(2)
--
-- Removes sequence registration in set.
--
-- Called by:
-- - On root by londiste.local_remove_seq()
-- - Elsewhere by consumer receiving seq remove event
--
-- Returns:
-- 200 - OK
-- 400 - not found
-- ----------------------------------------------------------------------
declare
fq_name text;
begin
fq_name := londiste.make_fqname(i_seq_name);
delete from londiste.seq_info
where queue_name = i_queue_name
and seq_name = fq_name;
if not found then
select 400, 'Sequence not found: '||fq_name into ret_code, ret_note;
return;
end if;
if pgq_node.is_root_node(i_queue_name) then
perform londiste.root_notify_change(i_queue_name, 'londiste.remove-seq', fq_name);
end if;
select 200, 'Sequence removed: '||fq_name into ret_code, ret_note;
return;
end;
$$ language plpgsql strict;
-- Group: FKey handling
create or replace function londiste.get_table_pending_fkeys(i_table_name text)
returns setof londiste.pending_fkeys as $$
-- ----------------------------------------------------------------------
-- Function: londiste.get_table_pending_fkeys(1)
--
-- Return dropped fkeys for table.
--
-- Parameters:
-- i_table_name - fqname
--
-- Returns:
-- desc
-- ----------------------------------------------------------------------
declare
fkeys record;
begin
for fkeys in
select *
from londiste.pending_fkeys
where from_table = i_table_name or to_table = i_table_name
order by 1,2,3
loop
return next fkeys;
end loop;
return;
end;
$$ language plpgsql strict stable;
create or replace function londiste.get_valid_pending_fkeys(i_queue_name text)
returns setof londiste.pending_fkeys as $$
-- ----------------------------------------------------------------------
-- Function: londiste.get_valid_pending_fkeys(1)
--
-- Returns dropped fkeys where both sides are in sync now.
--
-- Parameters:
-- i_queue_name - cascaded queue name
--
-- Returns:
-- desc
-- ----------------------------------------------------------------------
declare
fkeys record;
begin
for fkeys in
select pf.*
from londiste.pending_fkeys pf
order by 1, 2, 3
loop
perform 1
from londiste.table_info st_from
where coalesce(st_from.dest_table, st_from.table_name) = fkeys.from_table
and st_from.merge_state = 'ok'
and st_from.custom_snapshot is null
and st_from.queue_name = i_queue_name;
if not found then
continue;
end if;
perform 1
from londiste.table_info st_to
where coalesce(st_to.dest_table, st_to.table_name) = fkeys.to_table
and st_to.merge_state = 'ok'
and st_to.custom_snapshot is null
and st_to.queue_name = i_queue_name;
if not found then
continue;
end if;
return next fkeys;
end loop;
return;
end;
$$ language plpgsql strict stable;
create or replace function londiste.drop_table_fkey(i_from_table text, i_fkey_name text)
returns integer as $$
-- ----------------------------------------------------------------------
-- Function: londiste.drop_table_fkey(2)
--
-- Drop one fkey, save in pending table.
-- ----------------------------------------------------------------------
declare
fkey record;
begin
select * into fkey
from londiste.find_table_fkeys(i_from_table)
where fkey_name = i_fkey_name and from_table = i_from_table;
if not found then
return 0;
end if;
insert into londiste.pending_fkeys values (fkey.from_table, fkey.to_table, i_fkey_name, fkey.fkey_def);
execute 'alter table only ' || londiste.quote_fqname(fkey.from_table)
|| ' drop constraint ' || quote_ident(i_fkey_name);
return 1;
end;
$$ language plpgsql strict;
create or replace function londiste.restore_table_fkey(i_from_table text, i_fkey_name text)
returns integer as $$
-- ----------------------------------------------------------------------
-- Function: londiste.restore_table_fkey(2)
--
-- Restore dropped fkey.
--
-- Parameters:
-- i_from_table - source table
-- i_fkey_name - fkey name
--
-- Returns:
-- nothing
-- ----------------------------------------------------------------------
declare
fkey record;
begin
select * into fkey
from londiste.pending_fkeys
where fkey_name = i_fkey_name and from_table = i_from_table;
if not found then
return 0;
end if;
execute fkey.fkey_def;
delete from londiste.pending_fkeys where fkey_name = fkey.fkey_name;
return 1;
end;
$$ language plpgsql strict;
-- Group: Execute handling
create or replace function londiste.execute_start(
in i_queue_name text,
in i_file_name text,
in i_sql text,
in i_expect_root boolean,
in i_attrs text,
out ret_code int4,
out ret_note text)
as $$
-- ----------------------------------------------------------------------
-- Function: londiste.execute_start(5)
--
-- Start execution of DDL. Should be called at the
-- start of the transaction that does the SQL execution.
--
-- Called-by:
-- Londiste setup tool on root, replay on branches/leafs.
--
-- Parameters:
-- i_queue_name - cascaded queue name
-- i_file_name - Unique ID for SQL
-- i_sql - Actual script (informative, not used here)
-- i_expect_root - Is this on root? Setup tool sets this to avoid
-- execution on branches.
-- i_attrs - urlencoded dict of extra attributes.
-- The value will be put into ev_extra2
-- field of outgoing event.
--
-- Returns:
-- 200 - Proceed.
-- 201 - Already applied
-- 401 - Not root.
-- 404 - No such queue
-- ----------------------------------------------------------------------
declare
is_root boolean;
begin
is_root := pgq_node.is_root_node(i_queue_name);
if i_expect_root then
if not is_root then
select 401, 'Node is not root node: ' || i_queue_name
into ret_code, ret_note;
return;
end if;
end if;
perform 1 from londiste.applied_execute
where execute_file = i_file_name;
if found then
select 201, 'EXECUTE: "' || i_file_name || '" already applied, skipping'
into ret_code, ret_note;
return;
end if;
-- this also lock against potetial parallel execute
insert into londiste.applied_execute (queue_name, execute_file, execute_sql, execute_attrs)
values (i_queue_name, i_file_name, i_sql, i_attrs);
select 200, 'Executing: ' || i_file_name into ret_code, ret_note;
return;
end;
$$ language plpgsql;
create or replace function londiste.execute_start(
in i_queue_name text,
in i_file_name text,
in i_sql text,
in i_expect_root boolean,
out ret_code int4,
out ret_note text)
as $$
-- ----------------------------------------------------------------------
-- Function: londiste.execute_start(4)
--
-- Start execution of DDL. Should be called at the
-- start of the transaction that does the SQL execution.
--
-- Called-by:
-- Londiste setup tool on root, replay on branches/leafs.
--
-- Parameters:
-- i_queue_name - cascaded queue name
-- i_file_name - Unique ID for SQL
-- i_sql - Actual script (informative, not used here)
-- i_expect_root - Is this on root? Setup tool sets this to avoid
-- execution on branches.
--
-- Returns:
-- 200 - Proceed.
-- 301 - Already applied
-- 401 - Not root.
-- 404 - No such queue
-- ----------------------------------------------------------------------
begin
select f.ret_code, f.ret_note
from londiste.execute_start(i_queue_name, i_file_name, i_sql, i_expect_root, null) f
into ret_code, ret_note;
return;
end;
$$ language plpgsql;
create or replace function londiste.execute_finish(
in i_queue_name text,
in i_file_name text,
out ret_code int4,
out ret_note text)
as $$
-- ----------------------------------------------------------------------
-- Function: londiste.execute_finish(2)
--
-- Finish execution of DDL. Should be called at the
-- end of the transaction that does the SQL execution.
--
-- Called-by:
-- Londiste setup tool on root, replay on branches/leafs.
--
-- Returns:
-- 200 - Proceed.
-- 404 - Current entry not found, execute_start() was not called?
-- ----------------------------------------------------------------------
declare
is_root boolean;
sql text;
attrs text;
begin
is_root := pgq_node.is_root_node(i_queue_name);
select execute_sql, execute_attrs
into sql, attrs
from londiste.applied_execute
where execute_file = i_file_name;
if not found then
select 404, 'execute_file called without execute_start'
into ret_code, ret_note;
return;
end if;
if is_root then
perform pgq.insert_event(i_queue_name, 'EXECUTE', sql, i_file_name, attrs, null, null);
end if;
select 200, 'Execute finished: ' || i_file_name into ret_code, ret_note;
return;
end;
$$ language plpgsql strict;
-- Group: Internal functions
create or replace function londiste.root_check_seqs(
in i_queue_name text, in i_buffer int8,
out ret_code int4, out ret_note text)
as $$
-- ----------------------------------------------------------------------
-- Function: londiste.root_check_seqs(1)
--
-- Check sequences, and publish values if needed.
--
-- Parameters:
-- i_queue_name - set name
-- i_buffer - safety room
--
-- Returns:
-- 200 - OK
-- 402 - Not a root node
-- 404 - Queue not found
-- ----------------------------------------------------------------------
declare
n record;
seq record;
real_value int8;
pub_value int8;
real_buffer int8;
begin
if i_buffer is null or i_buffer < 10 then
real_buffer := 10000;
else
real_buffer := i_buffer;
end if;
select node_type, node_name into n
from pgq_node.node_info
where queue_name = i_queue_name
for update;
if not found then
select 404, 'Queue not found: ' || i_queue_name into ret_code, ret_note;
return;
end if;
if n.node_type <> 'root' then
select 402, 'Not a root node' into ret_code, ret_note;
return;
end if;
for seq in
select seq_name, last_value,
londiste.quote_fqname(seq_name) as fqname
from londiste.seq_info
where queue_name = i_queue_name
and local
order by nr
loop
execute 'select last_value from ' || seq.fqname into real_value;
if real_value + real_buffer >= seq.last_value then
pub_value := real_value + real_buffer * 3;
perform pgq.insert_event(i_queue_name, 'londiste.update-seq',
pub_value::text, seq.seq_name, null, null, null);
update londiste.seq_info set last_value = pub_value
where queue_name = i_queue_name
and seq_name = seq.seq_name;
end if;
end loop;
select 100, 'Sequences updated' into ret_code, ret_note;
return;
end;
$$ language plpgsql;
create or replace function londiste.root_check_seqs(
in i_queue_name text,
out ret_code int4, out ret_note text)
as $$
begin
select f.ret_code, f.ret_note
into ret_code, ret_note
from londiste.root_check_seqs(i_queue_name, 10000) f;
return;
end;
$$ language plpgsql;
create or replace function londiste.root_notify_change(i_queue_name text, i_ev_type text, i_ev_data text)
returns integer as $$
-- ----------------------------------------------------------------------
-- Function: londiste.root_notify_change(3)
--
-- Send event about change in root downstream.
-- ----------------------------------------------------------------------
declare
que text;
ntype text;
begin
if not coalesce(pgq_node.is_root_node(i_queue_name), false) then
raise exception 'only root node can send events';
end if;
perform pgq.insert_event(i_queue_name, i_ev_type, i_ev_data);
return 1;
end;
$$ language plpgsql;
create or replace function londiste.local_set_table_state(
in i_queue_name text,
in i_table_name text,
in i_snapshot text,
in i_merge_state text,
out ret_code int4,
out ret_note text)
as $$
-- ----------------------------------------------------------------------
-- Function: londiste.local_set_table_state(4)
--
-- Change table state.
--
-- Parameters:
-- i_queue_name - cascaded queue name
-- i_table - table name
-- i_snapshot - optional remote snapshot info
-- i_merge_state - merge state
-- ----------------------------------------------------------------------
declare
_tbl text;
begin
_tbl = londiste.make_fqname(i_table_name);
update londiste.table_info
set custom_snapshot = i_snapshot,
merge_state = i_merge_state
where queue_name = i_queue_name
and table_name = _tbl
and local;
if not found then
select 404, 'No such table: ' || _tbl
into ret_code, ret_note;
return;
end if;
select 200, 'Table ' || _tbl || ' state set to '
|| coalesce(quote_literal(i_merge_state), 'NULL')
into ret_code, ret_note;
return;
end;
$$ language plpgsql;
create or replace function londiste.local_set_table_attrs(
in i_queue_name text,
in i_table_name text,
in i_table_attrs text,
out ret_code int4,
out ret_note text)
as $$
-- ----------------------------------------------------------------------
-- Function: londiste.local_set_table_attrs(3)
--
-- Store urlencoded table attributes.
--
-- Parameters:
-- i_queue_name - cascaded queue name
-- i_table - table name
-- i_table_attrs - urlencoded attributes
-- ----------------------------------------------------------------------
begin
update londiste.table_info
set table_attrs = i_table_attrs
where queue_name = i_queue_name
and table_name = i_table_name
and local;
if found then
select 200, i_table_name || ': Table attributes stored'
into ret_code, ret_note;
else
select 404, 'no such local table: ' || i_table_name
into ret_code, ret_note;
end if;
return;
end;
$$ language plpgsql;
create or replace function londiste.local_set_table_struct(
in i_queue_name text,
in i_table_name text,
in i_dropped_ddl text,
out ret_code int4,
out ret_note text)
as $$
-- ----------------------------------------------------------------------
-- Function: londiste.local_set_table_struct(3)
--
-- Store dropped table struct temporarily.
--
-- Parameters:
-- i_queue_name - cascaded queue name
-- i_table - table name
-- i_dropped_ddl - merge state
-- ----------------------------------------------------------------------
begin
update londiste.table_info
set dropped_ddl = i_dropped_ddl
where queue_name = i_queue_name
and table_name = i_table_name
and local;
if found then
select 200, 'Table struct stored'
into ret_code, ret_note;
else
select 404, 'no such local table: '||i_table_name
into ret_code, ret_note;
end if;
return;
end;
$$ language plpgsql;
create or replace function londiste.periodic_maintenance()
returns integer as $$
-- ----------------------------------------------------------------------
-- Function: londiste.periodic_maintenance(0)
--
-- Clean random stuff.
-- ----------------------------------------------------------------------
begin
-- clean old EXECUTE entries
delete from londiste.applied_execute
where execute_time < now() - '3 months'::interval;
return 0;
end;
$$ language plpgsql; -- need admin access
-- Group: Utility functions
create or replace function londiste.find_column_types(tbl text)
returns text as $$
-- ----------------------------------------------------------------------
-- Function: londiste.find_column_types(1)
--
-- Returns columnt type string for logtriga().
--
-- Parameters:
-- tbl - fqname
--
-- Returns:
-- String of 'kv'.
-- ----------------------------------------------------------------------
declare
res text;
col record;
tbl_oid oid;
begin
tbl_oid := londiste.find_table_oid(tbl);
res := '';
for col in
SELECT CASE WHEN k.attname IS NOT NULL THEN 'k' ELSE 'v' END AS type
FROM pg_attribute a LEFT JOIN (
SELECT k.attname FROM pg_index i, pg_attribute k
WHERE i.indrelid = tbl_oid AND k.attrelid = i.indexrelid
AND i.indisprimary AND k.attnum > 0 AND NOT k.attisdropped
) k ON (k.attname = a.attname)
WHERE a.attrelid = tbl_oid AND a.attnum > 0 AND NOT a.attisdropped
ORDER BY a.attnum
loop
res := res || col.type;
end loop;
return res;
end;
$$ language plpgsql strict stable;
create or replace function londiste.find_table_fkeys(i_table_name text)
returns setof londiste.pending_fkeys as $$
-- ----------------------------------------------------------------------
-- Function: londiste.find_table_fkeys(1)
--
-- Return all active fkeys.
--
-- Parameters:
-- i_table_name - fqname
--
-- Returns:
-- from_table - fqname
-- to_table - fqname
-- fkey_name - name
-- fkey_def - full def
-- ----------------------------------------------------------------------
declare
fkey record;
tbl_oid oid;
begin
select londiste.find_table_oid(i_table_name) into tbl_oid;
for fkey in
select n1.nspname || '.' || t1.relname as from_table, n2.nspname || '.' || t2.relname as to_table,
conname::text as fkey_name,
'alter table only ' || quote_ident(n1.nspname) || '.' || quote_ident(t1.relname)
|| ' add constraint ' || quote_ident(conname::text) || ' ' || pg_get_constraintdef(c.oid)
as fkey_def
from pg_constraint c, pg_namespace n1, pg_class t1, pg_namespace n2, pg_class t2
where c.contype = 'f' and (c.conrelid = tbl_oid or c.confrelid = tbl_oid)
and t1.oid = c.conrelid and n1.oid = t1.relnamespace
and t2.oid = c.confrelid and n2.oid = t2.relnamespace
order by 1,2,3
loop
return next fkey;
end loop;
return;
end;
$$ language plpgsql strict stable;
drop function if exists londiste.find_seq_oid(text);
drop function if exists londiste.find_table_oid(text);
drop function if exists londiste.find_rel_oid(text, text);
create or replace function londiste.find_rel_oid(i_fqname text, i_kind text)
returns oid as $$
-- ----------------------------------------------------------------------
-- Function: londiste.find_rel_oid(2)
--
-- Find pg_class row oid.
--
-- Parameters:
-- i_fqname - fq object name
-- i_kind - relkind value
--
-- Returns:
-- oid or exception of not found
-- ----------------------------------------------------------------------
declare
res oid;
pos integer;
schema text;
name text;
begin
pos := position('.' in i_fqname);
if pos > 0 then
schema := substring(i_fqname for pos - 1);
name := substring(i_fqname from pos + 1);
else
schema := 'public';
name := i_fqname;
end if;
select c.oid into res
from pg_namespace n, pg_class c
where c.relnamespace = n.oid
and c.relkind = i_kind
and n.nspname = schema and c.relname = name;
if not found then
res := NULL;
end if;
return res;
end;
$$ language plpgsql strict stable;
create or replace function londiste.find_table_oid(tbl text)
returns oid as $$
-- ----------------------------------------------------------------------
-- Function: londiste.find_table_oid(1)
--
-- Find table oid based on fqname.
--
-- Parameters:
-- tbl - fqname
--
-- Returns:
-- oid
-- ----------------------------------------------------------------------
begin
return londiste.find_rel_oid(tbl, 'r');
end;
$$ language plpgsql strict stable;
create or replace function londiste.find_seq_oid(seq text)
returns oid as $$
-- ----------------------------------------------------------------------
-- Function: londiste.find_seq_oid(1)
--
-- Find sequence oid based on fqname.
--
-- Parameters:
-- seq - fqname
--
-- Returns:
-- oid
-- ----------------------------------------------------------------------
begin
return londiste.find_rel_oid(seq, 'S');
end;
$$ language plpgsql strict stable;
create or replace function londiste.quote_fqname(i_name text)
returns text as $$
-- ----------------------------------------------------------------------
-- Function: londiste.quote_fqname(1)
--
-- Quete fully-qualified object name for SQL.
--
-- First dot is taken as schema separator.
--
-- If schema is missing, 'public' is assumed.
--
-- Parameters:
-- i_name - fully qualified object name.
--
-- Returns:
-- Quoted name.
-- ----------------------------------------------------------------------
declare
res text;
pos integer;
s text;
n text;
begin
pos := position('.' in i_name);
if pos > 0 then
s := substring(i_name for pos - 1);
n := substring(i_name from pos + 1);
else
s := 'public';
n := i_name;
end if;
return quote_ident(s) || '.' || quote_ident(n);
end;
$$ language plpgsql strict immutable;
create or replace function londiste.make_fqname(i_name text)
returns text as $$
-- ----------------------------------------------------------------------
-- Function: londiste.make_fqname(1)
--
-- Make name to schema-qualified one.
--
-- First dot is taken as schema separator.
--
-- If schema is missing, 'public' is assumed.
--
-- Parameters:
-- i_name - object name.
--
-- Returns:
-- Schema qualified name.
-- ----------------------------------------------------------------------
begin
if position('.' in i_name) > 0 then
return i_name;
else
return 'public.' || i_name;
end if;
end;
$$ language plpgsql strict immutable;
create or replace function londiste.split_fqname(
in i_fqname text,
out schema_part text,
out name_part text)
as $$
-- ----------------------------------------------------------------------
-- Function: londiste.split_fqname(1)
--
-- Split fqname to schema and name parts.
--
-- First dot is taken as schema separator.
--
-- If schema is missing, 'public' is assumed.
--
-- Parameters:
-- i_fqname - object name.
-- ----------------------------------------------------------------------
declare
dot integer;
begin
dot = position('.' in i_fqname);
if dot > 0 then
schema_part = substring(i_fqname for dot - 1);
name_part = substring(i_fqname from dot + 1);
else
schema_part = 'public';
name_part = i_fqname;
end if;
return;
end;
$$ language plpgsql strict immutable;
create or replace function londiste.table_info_trigger()
returns trigger as $$
-- ----------------------------------------------------------------------
-- Function: londiste.table_info_trigger(0)
--
-- Trigger on londiste.table_info. Cleans triggers from tables
-- when table is removed from londiste.table_info.
-- ----------------------------------------------------------------------
begin
if TG_OP = 'DELETE' then
perform londiste.drop_table_triggers(OLD.queue_name, OLD.table_name);
end if;
return OLD;
end;
$$ language plpgsql;
create or replace function londiste.drop_table_triggers(
in i_queue_name text, in i_table_name text)
returns void as $$
-- ----------------------------------------------------------------------
-- Function: londiste.drop_table_triggers(2)
--
-- Remove Londiste triggers from table.
--
-- Parameters:
-- i_queue_name - set name
-- i_table_name - table name
--
-- Returns:
-- 200 - OK
-- 404 - Table not found
-- ----------------------------------------------------------------------
declare
logtrg_name text;
b_queue_name bytea;
_dest_table text;
begin
select coalesce(dest_table, table_name)
from londiste.table_info t
where t.queue_name = i_queue_name
and t.table_name = i_table_name
into _dest_table;
if not found then
return;
end if;
-- skip if no triggers found on that table
perform 1 from pg_catalog.pg_trigger where tgrelid = londiste.find_table_oid(_dest_table);
if not found then
return;
end if;
-- cast to bytea
b_queue_name := decode(replace(i_queue_name, E'\\', E'\\\\'), 'escape');
-- drop all replication triggers that target our queue.
-- by checking trigger func and queue name there is not
-- dependency on naming standard or side-storage.
for logtrg_name in
select tgname from pg_catalog.pg_trigger
where tgrelid = londiste.find_table_oid(_dest_table)
and londiste.is_replica_func(tgfoid)
and octet_length(tgargs) > 0
and substring(tgargs for (position(E'\\000'::bytea in tgargs) - 1)) = b_queue_name
loop
execute 'drop trigger ' || quote_ident(logtrg_name)
|| ' on ' || londiste.quote_fqname(_dest_table);
end loop;
end;
$$ language plpgsql strict;
create or replace function londiste.is_replica_func(func_oid oid)
returns boolean as $$
-- ----------------------------------------------------------------------
-- Function: londiste.is_replica_func(1)
--
-- Returns true if function is a PgQ-based replication functions.
-- This also means it takes queue name as first argument.
-- ----------------------------------------------------------------------
select count(1) > 0
from pg_proc f join pg_namespace n on (n.oid = f.pronamespace)
where f.oid = $1 and n.nspname = 'pgq' and f.proname in ('sqltriga', 'logutriga');
$$ language sql strict stable;
create or replace function londiste.version()
returns text as $$
-- ----------------------------------------------------------------------
-- Function: londiste.version(0)
--
-- Returns version string for londiste. ATM it is based on SkyTools
-- version and only bumped when database code changes.
-- ----------------------------------------------------------------------
begin
return '3.2';
end;
$$ language plpgsql;
-- Group: Utility functions for handlers
create or replace function londiste.create_partition(
i_table text,
i_part text,
i_pkeys text,
i_part_field text,
i_part_time timestamptz,
i_part_period text
) returns int as $$
------------------------------------------------------------------------
-- Function: londiste.create_partition
--
-- Creates inherited child table if it does not exist by copying parent table's structure.
-- Locks londiste.table_info table to avoid parallel creation of any partitions.
--
-- Elements that are copied over by "LIKE x INCLUDING ALL":
-- * Defaults
-- * Constraints
-- * Indexes
-- * Storage options (9.0+)
-- * Comments (9.0+)
--
-- Elements that are copied over manually because LIKE ALL does not support them:
-- * Grants
-- * Triggers
-- * Rules
--
-- Parameters:
-- i_table - name of parent table
-- i_part - name of partition table to create
-- i_pkeys - primary key fields (comma separated, used to create constraint).
-- i_part_field - field used to partition table (when not partitioned by field, value is NULL)
-- i_part_time - partition time
-- i_part_period - period of partitioned data, current possible values are 'hour', 'day', 'month' and 'year'
--
-- Example:
-- select londiste.create_partition('aggregate.user_call_monthly', 'aggregate.user_call_monthly_2010_01', 'key_user', 'period_start', '2010-01-10 11:00'::timestamptz, 'month');
--
------------------------------------------------------------------------
declare
chk_start text;
chk_end text;
part_start timestamptz;
part_end timestamptz;
parent_schema text;
parent_name text;
parent_oid oid;
part_schema text;
part_name text;
owner name;
pos int4;
fq_table text;
fq_part text;
q_grantee text;
g record;
r record;
tg record;
sql text;
pgver integer;
r_oldtbl text;
r_extra text;
r_sql text;
begin
if i_table is null or i_part is null then
raise exception 'need table and part';
end if;
-- load postgres version (XYYZZ).
show server_version_num into pgver;
-- parent table schema and name + quoted name
pos := position('.' in i_table);
if pos > 0 then
parent_schema := substring(i_table for pos - 1);
parent_name := substring(i_table from pos + 1);
else
parent_schema := 'public';
parent_name := i_table;
end if;
fq_table := quote_ident(parent_schema) || '.' || quote_ident(parent_name);
-- part table schema and name + quoted name
pos := position('.' in i_part);
if pos > 0 then
part_schema := substring(i_part for pos - 1);
part_name := substring(i_part from pos + 1);
else
part_schema := 'public';
part_name := i_part;
end if;
fq_part := quote_ident(part_schema) || '.' || quote_ident(part_name);
-- allow only single creation at a time, without affecting DML operations
-- (changed from locking parent table to avoid deadlocks from concurrent workers)
execute 'lock table londiste.table_info in share update exclusive mode';
parent_oid := fq_table::regclass::oid;
-- check if part table exists
perform 1 from pg_class t, pg_namespace s
where t.relnamespace = s.oid
and s.nspname = part_schema
and t.relname = part_name;
if found then
return 0;
end if;
-- need to use 'like' to get indexes
sql := 'create table ' || fq_part || ' (like ' || fq_table;
if pgver >= 90000 then
sql := sql || ' including all';
else
sql := sql || ' including indexes including constraints including defaults';
end if;
sql := sql || ') inherits (' || fq_table || ')';
execute sql;
-- find out parent table owner
select o.rolname into owner
from pg_class t, pg_namespace s, pg_roles o
where t.relnamespace = s.oid
and s.nspname = parent_schema
and t.relname = parent_name
and t.relowner = o.oid;
-- set proper part table ownership
if owner != user then
sql = 'alter table ' || fq_part || ' owner to ' || quote_ident(owner);
execute sql;
end if;
-- extra check constraint
if i_part_field != '' then
part_start := date_trunc(i_part_period, i_part_time);
part_end := part_start + ('1 ' || i_part_period)::interval;
chk_start := quote_literal(to_char(part_start, 'YYYY-MM-DD HH24:MI:SS'));
chk_end := quote_literal(to_char(part_end, 'YYYY-MM-DD HH24:MI:SS'));
sql := 'alter table '|| fq_part || ' add check ('
|| quote_ident(i_part_field) || ' >= ' || chk_start || ' and '
|| quote_ident(i_part_field) || ' < ' || chk_end || ')';
execute sql;
end if;
-- load grants from parent table
for g in
select grantor, grantee, privilege_type, is_grantable
from information_schema.table_privileges
where table_schema = parent_schema
and table_name = parent_name
loop
if g.grantee = 'PUBLIC' then
q_grantee = 'public';
else
q_grantee := quote_ident(g.grantee);
end if;
sql := 'grant ' || g.privilege_type || ' on ' || fq_part || ' to ' || q_grantee;
if g.is_grantable = 'YES' then
sql := sql || ' with grant option';
end if;
execute sql;
end loop;
-- generate triggers info query
sql := 'SELECT tgname, tgenabled,'
|| ' pg_catalog.pg_get_triggerdef(oid) as tgdef'
|| ' FROM pg_catalog.pg_trigger '
|| ' WHERE tgrelid = ' || parent_oid::text
|| ' AND ';
if pgver >= 90000 then
sql := sql || ' NOT tgisinternal';
else
sql := sql || ' NOT tgisconstraint';
end if;
-- copy triggers
for tg in execute sql
loop
sql := regexp_replace(tg.tgdef, E' ON ([[:alnum:]_.]+|"([^"]|"")+")+ ', ' ON ' || fq_part || ' ');
if sql = tg.tgdef then
raise exception 'Failed to reconstruct the trigger: %', sql;
end if;
execute sql;
if tg.tgenabled = 'O' then
-- standard mode
r_extra := NULL;
elsif tg.tgenabled = 'D' then
r_extra := ' DISABLE TRIGGER ';
elsif tg.tgenabled = 'A' then
r_extra := ' ENABLE ALWAYS TRIGGER ';
elsif tg.tgenabled = 'R' then
r_extra := ' ENABLE REPLICA TRIGGER ';
else
raise exception 'Unknown trigger mode: %', tg.tgenabled;
end if;
if r_extra is not null then
sql := 'ALTER TABLE ' || fq_part || r_extra || quote_ident(tg.tgname);
execute sql;
end if;
end loop;
-- copy rules
for r in
select rw.rulename, rw.ev_enabled, pg_catalog.pg_get_ruledef(rw.oid) as definition
from pg_catalog.pg_rewrite rw
where rw.ev_class = parent_oid
and rw.rulename <> '_RETURN'::name
loop
-- try to skip rule name
r_extra := 'CREATE RULE ' || quote_ident(r.rulename) || ' AS';
r_sql := substr(r.definition, 1, char_length(r_extra));
if r_sql = r_extra then
r_sql := substr(r.definition, char_length(r_extra));
else
raise exception 'failed to match rule name';
end if;
-- no clue what name was used in defn, so find it from sql
r_oldtbl := substring(r_sql from ' TO (([[:alnum:]_.]+|"([^"]+|"")+")+)[[:space:]]');
if char_length(r_oldtbl) > 0 then
sql := replace(r.definition, r_oldtbl, fq_part);
else
raise exception 'failed to find original table name';
end if;
execute sql;
-- rule flags
r_extra := NULL;
if r.ev_enabled = 'R' then
r_extra = ' ENABLE REPLICA RULE ';
elsif r.ev_enabled = 'A' then
r_extra = ' ENABLE ALWAYS RULE ';
elsif r.ev_enabled = 'D' then
r_extra = ' DISABLE RULE ';
elsif r.ev_enabled <> 'O' then
raise exception 'unknown rule option: %', r.ev_enabled;
end if;
if r_extra is not null then
sql := 'ALTER TABLE ' || fq_part || r_extra
|| quote_ident(r.rulename);
execute sql;
end if;
end loop;
return 1;
end;
$$ language plpgsql;
create or replace function londiste.drop_obsolete_partitions
(
in i_parent_table text,
in i_retention_period interval,
in i_partition_period text
)
returns setof text
as $$
-------------------------------------------------------------------------------
-- Function: londiste.drop_obsolete_partitions(3)
--
-- Drop obsolete partitions of partition-by-date parent table.
--
-- Parameters:
-- i_parent_table Master table from which partitions are inherited
-- i_retention_period How long to keep partitions around
-- i_partition_period One of: year, month, day, hour
--
-- Returns:
-- Names of partitions dropped
-------------------------------------------------------------------------------
declare
_schema text not null := lower (split_part (i_parent_table, '.', 1));
_table text not null := lower (split_part (i_parent_table, '.', 2));
_part text;
_expr text;
_dfmt text;
begin
if i_partition_period in ('year', 'yearly') then
_expr := '_[0-9]{4}';
_dfmt := '_YYYY';
elsif i_partition_period in ('month', 'monthly') then
_expr := '_[0-9]{4}_[0-9]{2}';
_dfmt := '_YYYY_MM';
elsif i_partition_period in ('day', 'daily') then
_expr := '_[0-9]{4}_[0-9]{2}_[0-9]{2}';
_dfmt := '_YYYY_MM_DD';
elsif i_partition_period in ('hour', 'hourly') then
_expr := '_[0-9]{4}_[0-9]{2}_[0-9]{2}_[0-9]{2}';
_dfmt := '_YYYY_MM_DD_HH24';
else
raise exception 'not supported i_partition_period: %', i_partition_period;
end if;
if length (_table) = 0 then
_table := _schema;
_schema := 'public';
end if;
for _part in
select quote_ident (t.schemaname) ||'.'|| quote_ident (t.tablename)
from pg_catalog.pg_tables t
where t.schemaname = _schema
and t.tablename ~ ('^'|| _table || _expr ||'$')
and t.tablename < _table || to_char (now() - i_retention_period, _dfmt)
order by 1
loop
execute 'drop table '|| _part;
return next _part;
end loop;
end;
$$ language plpgsql;
|