/usr/share/postgresql/9.5/extension/mimeo--0.5.0--0.5.1.sql is in postgresql-9.5-mimeo 1.4.1-1.
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 | -- Fixed table definition for refresh_config table to not use hardcoded schema name for type column
-- Added public schema to functions that change the search_path for their run. Fixes issues with finding certain objects located in public schema
/*
* DML destroyer function. Pass ARCHIVE to keep table intact.
*/
CREATE OR REPLACE FUNCTION dml_destroyer(p_dest_table text, p_archive_option text) RETURNS void
LANGUAGE plpgsql
AS $$
DECLARE
v_conns text[];
v_dblink int;
v_dblink_schema text;
v_dest_table text;
v_drop_function text;
v_drop_q_table text;
v_drop_trigger text;
v_old_search_path text;
v_src_table text;
v_table_name text;
BEGIN
SELECT nspname INTO v_dblink_schema FROM pg_namespace n, pg_extension e WHERE e.extname = 'dblink' AND e.extnamespace = n.oid;
SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_dblink_schema||',public'',''false'')';
SELECT source_table, dest_table, dblink INTO v_src_table, v_dest_table, v_dblink
FROM @extschema@.refresh_config_dml WHERE dest_table = p_dest_table;
IF NOT FOUND THEN
RAISE EXCEPTION 'This table is not set up for dml replication: %', v_dest_table;
END IF;
-- Split off schema name if it exists
IF position('.' in v_src_table) > 0 THEN
v_table_name := substring(v_src_table from position('.' in v_src_table)+1);
END IF;
v_drop_function := 'DROP FUNCTION @extschema@.'||v_table_name||'_mimeo_queue()';
v_drop_trigger := 'DROP TRIGGER '||v_table_name||'_mimeo_trig ON '||v_src_table;
v_drop_q_table := 'DROP TABLE @extschema@.'||v_table_name||'_pgq';
RAISE NOTICE 'Removing mimeo objects from source database (trigger, function, queue table)';
PERFORM dblink_connect('mimeo_dml_destroy', @extschema@.auth(v_dblink));
PERFORM dblink_exec('mimeo_dml_destroy', v_drop_trigger);
PERFORM dblink_exec('mimeo_dml_destroy', v_drop_function);
PERFORM dblink_exec('mimeo_dml_destroy', v_drop_q_table);
IF p_archive_option != 'ARCHIVE' THEN
EXECUTE 'DROP TABLE ' || v_dest_table;
END IF;
RAISE NOTICE 'Removing config data';
EXECUTE 'DELETE FROM @extschema@.refresh_config_dml WHERE dest_table = ' || quote_literal(v_dest_table);
PERFORM dblink_disconnect('mimeo_dml_destroy');
RAISE NOTICE 'Done';
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
EXCEPTION
WHEN OTHERS THEN
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_dblink_schema||''',''false'')';
v_conns := dblink_get_connections();
IF dblink_get_connections() @> '{mimeo_dml_destroy}' THEN
PERFORM dblink_disconnect('mimeo_dml_destroy');
END IF;
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
RAISE EXCEPTION '%', SQLERRM;
END
$$;
/*
* DML maker function. Optional custom destination table name.
*/
CREATE OR REPLACE FUNCTION dml_maker(p_src_table text, p_dblink_id int, p_pk_field text[], p_pk_type text[], p_dest_table text DEFAULT NULL) RETURNS void
LANGUAGE plpgsql
AS $$
DECLARE
v_conns text[];
v_create_trig text;
v_dblink_schema text;
v_insert_refresh_config text;
v_old_search_path text;
v_pk_counter int := 1;
v_pk_field_csv text := '';
v_pk_field_type_csv text := '';
v_table_name text;
v_remote_q_index text;
v_remote_q_table text;
v_trigger_func text;
BEGIN
SELECT nspname INTO v_dblink_schema FROM pg_namespace n, pg_extension e WHERE e.extname = 'dblink' AND e.extnamespace = n.oid;
-- Set custom search path to allow easier calls to other functions
SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_dblink_schema||',public'',''false'')';
IF p_dest_table IS NULL THEN
p_dest_table := p_src_table;
END IF;
-- Split off schema name if it exists
IF position('.' in p_src_table) > 0 THEN
v_table_name := substring(p_src_table from position('.' in p_src_table)+1);
END IF;
v_remote_q_table := 'CREATE TABLE @extschema@.'||v_table_name||'_pgq (';
v_pk_field_csv := array_to_string(p_pk_field, ',');
WHILE v_pk_counter <= array_length(p_pk_field,1) LOOP
IF v_pk_counter > 1 THEN
v_pk_field_type_csv := v_pk_field_type_csv || ', ';
END IF;
v_pk_field_type_csv := v_pk_field_type_csv ||p_pk_field[v_pk_counter]||' '||p_pk_type[v_pk_counter];
v_pk_counter := v_pk_counter + 1;
END LOOP;
v_remote_q_table := v_remote_q_table || v_pk_field_type_csv || ', processed boolean)';
v_remote_q_index := 'CREATE INDEX ON @extschema@.'||v_table_name||'_pgq ('||v_pk_field_csv||')';
v_pk_counter := 1;
v_trigger_func := 'CREATE FUNCTION @extschema@.'||v_table_name||'_mimeo_queue() RETURNS trigger LANGUAGE plpgsql AS $_$ DECLARE ';
WHILE v_pk_counter <= array_length(p_pk_field,1) LOOP
v_trigger_func := v_trigger_func||'v_'||p_pk_field[v_pk_counter]||' '||p_pk_type[v_pk_counter]||'; ';
v_pk_counter := v_pk_counter + 1;
END LOOP;
v_pk_counter := 1;
v_trigger_func := v_trigger_func || ' BEGIN IF TG_OP = ''INSERT'' THEN ';
WHILE v_pk_counter <= array_length(p_pk_field,1) LOOP
v_trigger_func := v_trigger_func||' v_'||p_pk_field[v_pk_counter]||' := NEW.'||p_pk_field[v_pk_counter]||'; ';
v_pk_counter := v_pk_counter + 1;
END LOOP;
v_pk_counter := 1;
v_trigger_func := v_trigger_func || ' ELSE ';
WHILE v_pk_counter <= array_length(p_pk_field,1) LOOP
v_trigger_func := v_trigger_func||' v_'||p_pk_field[v_pk_counter]||' := OLD.'||p_pk_field[v_pk_counter]||'; ';
v_pk_counter := v_pk_counter + 1;
END LOOP;
v_pk_counter := 1;
v_trigger_func := v_trigger_func || ' END IF; INSERT INTO @extschema@.'||v_table_name||'_pgq ('||v_pk_field_csv||') ';
v_trigger_func := v_trigger_func || ' VALUES (';
WHILE v_pk_counter <= array_length(p_pk_field,1) LOOP
IF v_pk_counter > 1 THEN
v_trigger_func := v_trigger_func || ', ';
END IF;
v_trigger_func := v_trigger_func||'v_'||p_pk_field[v_pk_counter];
v_pk_counter := v_pk_counter + 1;
END LOOP;
v_trigger_func := v_trigger_func || '); RETURN NULL; END $_$;';
v_create_trig := 'CREATE TRIGGER '||v_table_name||'_mimeo_trig AFTER INSERT OR UPDATE OR DELETE ON '||p_src_table||
' FOR EACH ROW EXECUTE PROCEDURE @extschema@.'||v_table_name||'_mimeo_queue()';
PERFORM dblink_connect('mimeo_dml', @extschema@.auth(p_dblink_id));
RAISE NOTICE 'Creating objects on source database (function, trigger & queue table)...';
PERFORM dblink_exec('mimeo_dml', v_remote_q_table);
PERFORM dblink_exec('mimeo_dml', v_remote_q_index);
PERFORM dblink_exec('mimeo_dml', v_trigger_func);
PERFORM dblink_exec('mimeo_dml', v_create_trig);
PERFORM dblink_disconnect('mimeo_dml');
RAISE NOTICE 'Snapshotting source table to pull all current source data...';
-- Snapshot the table after triggers have been created to ensure all new data after setup is replicated
v_insert_refresh_config := 'INSERT INTO @extschema@.refresh_config_snap(source_table, dest_table, dblink) VALUES('
||quote_literal(p_src_table)||', '||quote_literal(p_dest_table)||', '|| p_dblink_id||')';
EXECUTE v_insert_refresh_config;
PERFORM @extschema@.refresh_snap(p_dest_table);
PERFORM @extschema@.snapshot_destroyer(p_dest_table, 'ARCHIVE');
v_insert_refresh_config := 'INSERT INTO @extschema@.refresh_config_dml(source_table, dest_table, dblink, control, pk_field, pk_type, last_value) VALUES('
||quote_literal(p_src_table)||', '||quote_literal(p_dest_table)||', '|| p_dblink_id||', '||quote_literal('@extschema@.'||v_table_name||'_pgq')||', '
||quote_literal(p_pk_field)||', '||quote_literal(p_pk_type)||', '||quote_literal(clock_timestamp())||')';
RAISE NOTICE 'Inserting data into config table';
EXECUTE v_insert_refresh_config;
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
RAISE NOTICE 'Done';
EXCEPTION
WHEN OTHERS THEN
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_dblink_schema||''',''false'')';
v_conns := dblink_get_connections();
IF dblink_get_connections() @> '{mimeo_dml}' THEN
PERFORM dblink_disconnect('mimeo_dml');
END IF;
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
RAISE EXCEPTION '%', SQLERRM;
END
$$;
/*
* Logdel destroyer function. Pass ARCHIVE to keep table intact.
*/
CREATE OR REPLACE FUNCTION logdel_destroyer(p_dest_table text, p_archive_option text) RETURNS void
LANGUAGE plpgsql
AS $$
DECLARE
v_conns text[];
v_dblink int;
v_dblink_schema text;
v_dest_table text;
v_drop_function text;
v_drop_q_table text;
v_drop_trigger text;
v_old_search_path text;
v_src_table text;
v_table_name text;
BEGIN
SELECT nspname INTO v_dblink_schema FROM pg_namespace n, pg_extension e WHERE e.extname = 'dblink' AND e.extnamespace = n.oid;
SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_dblink_schema||',public'',''false'')';
SELECT source_table, dest_table, dblink INTO v_src_table, v_dest_table, v_dblink
FROM @extschema@.refresh_config_logdel WHERE dest_table = p_dest_table;
IF NOT FOUND THEN
RAISE EXCEPTION 'This table is not set up for logdel replication: %', v_dest_table;
END IF;
-- Split off schema name if it exists
IF position('.' in v_src_table) > 0 THEN
v_table_name := substring(v_src_table from position('.' in v_src_table)+1);
END IF;
v_drop_function := 'DROP FUNCTION @extschema@.'||v_table_name||'_mimeo_queue()';
v_drop_trigger := 'DROP TRIGGER '||v_table_name||'_mimeo_trig ON '||v_src_table;
v_drop_q_table := 'DROP TABLE @extschema@.'||v_table_name||'_pgq';
RAISE NOTICE 'Removing mimeo objects from source database (trigger, function, queue table)';
PERFORM dblink_connect('mimeo_logdel_destroy', @extschema@.auth(v_dblink));
PERFORM dblink_exec('mimeo_logdel_destroy', v_drop_trigger);
PERFORM dblink_exec('mimeo_logdel_destroy', v_drop_function);
PERFORM dblink_exec('mimeo_logdel_destroy', v_drop_q_table);
IF p_archive_option != 'ARCHIVE' THEN
EXECUTE 'DROP TABLE ' || v_dest_table;
END IF;
RAISE NOTICE 'Removing config data';
EXECUTE 'DELETE FROM @extschema@.refresh_config_logdel WHERE dest_table = ' || quote_literal(v_dest_table);
PERFORM dblink_disconnect('mimeo_logdel_destroy');
RAISE NOTICE 'Done';
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
EXCEPTION
WHEN OTHERS THEN
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_dblink_schema||',public'',''false'')';
v_conns := dblink_get_connections();
IF dblink_get_connections() @> '{mimeo_logdel_destroy}' THEN
PERFORM dblink_disconnect('mimeo_logdel_destroy');
END IF;
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
RAISE EXCEPTION '%', SQLERRM;
END
$$;
/*
* DML maker function. Optional custom destination table name.
*/
CREATE OR REPLACE FUNCTION logdel_maker(p_src_table text, p_dblink_id int, p_pk_field text[], p_pk_type text[], p_dest_table text DEFAULT NULL) RETURNS void
LANGUAGE plpgsql
AS $$
DECLARE
v_cols text[];
v_cols_csv text;
v_cols_n_types text[];
v_cols_n_types_csv text;
v_conns text[];
v_create_trig text;
v_dblink_schema text;
v_insert_refresh_config text;
v_old_search_path text;
v_counter int := 1;
v_pk_field_csv text := '';
v_pk_field_type_csv text := '';
v_remote_sql text;
v_remote_q_index text;
v_remote_q_table text;
v_table_name text;
v_trigger_func text;
v_types text[];
BEGIN
SELECT nspname INTO v_dblink_schema FROM pg_namespace n, pg_extension e WHERE e.extname = 'dblink' AND e.extnamespace = n.oid;
-- Set custom search path to allow easier calls to other functions
SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_dblink_schema||',public'',''false'')';
IF p_dest_table IS NULL THEN
p_dest_table := p_src_table;
END IF;
-- Split off schema name if it exists
IF position('.' in p_src_table) > 0 THEN
v_table_name := substring(p_src_table from position('.' in p_src_table)+1);
END IF;
PERFORM dblink_connect('mimeo_logdel', @extschema@.auth(p_dblink_id));
v_remote_sql := 'SELECT array_agg(attname) as cols, array_agg(atttypid::regtype::text) as types, array_agg(attname||'' ''||atttypid::regtype::text) as cols_n_types FROM pg_attribute WHERE attnum > 0 AND attisdropped is false AND attrelid = ' || quote_literal(p_src_table) || '::regclass';
v_remote_sql := 'SELECT cols, types, cols_n_types FROM dblink(''mimeo_logdel'', ' || quote_literal(v_remote_sql) || ') t (cols text[], types text[], cols_n_types text[])';
EXECUTE v_remote_sql INTO v_cols, v_types, v_cols_n_types;
v_cols_csv := array_to_string(v_cols, ',');
v_cols_n_types_csv := array_to_string(v_cols_n_types, ',');
v_remote_q_table := 'CREATE TABLE @extschema@.'||v_table_name||'_pgq ('||v_cols_n_types_csv||', mimeo_source_deleted timestamptz, processed boolean)';
v_pk_field_csv := array_to_string(p_pk_field, ',');
WHILE v_counter <= array_length(p_pk_field,1) LOOP
IF v_counter > 1 THEN
v_pk_field_type_csv := v_pk_field_type_csv || ', ';
END IF;
v_pk_field_type_csv := v_pk_field_type_csv ||p_pk_field[v_counter]||' '||p_pk_type[v_counter];
v_counter := v_counter + 1;
END LOOP;
v_remote_q_index := 'CREATE INDEX ON @extschema@.'||v_table_name||'_pgq ('||v_pk_field_csv||')';
v_counter := 1;
v_trigger_func := 'CREATE FUNCTION @extschema@.'||v_table_name||'_mimeo_queue() RETURNS trigger LANGUAGE plpgsql AS $_$ DECLARE ';
WHILE v_counter <= array_length(v_cols,1) LOOP
v_trigger_func := v_trigger_func||'v_'||v_cols[v_counter]||' '||v_types[v_counter]||'; ';
v_counter := v_counter + 1;
END LOOP;
v_trigger_func := v_trigger_func || 'v_del_time timestamptz; ';
v_counter := 1;
v_trigger_func := v_trigger_func || ' BEGIN IF TG_OP = ''INSERT'' THEN ';
WHILE v_counter <= array_length(p_pk_field,1) LOOP
v_trigger_func := v_trigger_func||' v_'||p_pk_field[v_counter]||' := NEW.'||p_pk_field[v_counter]||'; ';
v_counter := v_counter + 1;
END LOOP;
v_counter := 1;
v_trigger_func := v_trigger_func || ' ELSIF TG_OP = ''UPDATE'' THEN ';
WHILE v_counter <= array_length(p_pk_field,1) LOOP
v_trigger_func := v_trigger_func||' v_'||p_pk_field[v_counter]||' := OLD.'||p_pk_field[v_counter]||'; ';
v_counter := v_counter + 1;
END LOOP;
v_counter := 1;
v_trigger_func := v_trigger_func || ' ELSIF TG_OP = ''DELETE'' THEN ';
WHILE v_counter <= array_length(v_cols,1) LOOP
v_trigger_func := v_trigger_func||' v_'||v_cols[v_counter]||' := OLD.'||v_cols[v_counter]||'; ';
v_counter := v_counter + 1;
END LOOP;
v_trigger_func := v_trigger_func || 'v_del_time := clock_timestamp(); ';
v_counter := 1;
v_trigger_func := v_trigger_func || ' END IF; INSERT INTO @extschema@.'||v_table_name||'_pgq ('||v_cols_csv||', mimeo_source_deleted) ';
v_trigger_func := v_trigger_func || ' VALUES (';
WHILE v_counter <= array_length(v_cols,1) LOOP
IF v_counter > 1 THEN
v_trigger_func := v_trigger_func || ', ';
END IF;
v_trigger_func := v_trigger_func||'v_'||v_cols[v_counter];
v_counter := v_counter + 1;
END LOOP;
v_trigger_func := v_trigger_func ||', v_del_time); RETURN NULL; END $_$;';
v_create_trig := 'CREATE TRIGGER '||v_table_name||'_mimeo_trig AFTER INSERT OR UPDATE OR DELETE ON '||p_src_table||
' FOR EACH ROW EXECUTE PROCEDURE @extschema@.'||v_table_name||'_mimeo_queue()';
RAISE NOTICE 'Creating objects on source database (function, trigger & queue table)...';
PERFORM dblink_exec('mimeo_logdel', v_remote_q_table);
PERFORM dblink_exec('mimeo_logdel', v_remote_q_index);
PERFORM dblink_exec('mimeo_logdel', v_trigger_func);
PERFORM dblink_exec('mimeo_logdel', v_create_trig);
PERFORM dblink_disconnect('mimeo_logdel');
RAISE NOTICE 'Snapshotting source table to pull all current source data...';
-- Snapshot the table after triggers have been created to ensure all new data after setup is replicated
v_insert_refresh_config := 'INSERT INTO @extschema@.refresh_config_snap(source_table, dest_table, dblink) VALUES('
||quote_literal(p_src_table)||', '||quote_literal(p_dest_table)||', '|| p_dblink_id||')';
EXECUTE v_insert_refresh_config;
PERFORM @extschema@.refresh_snap(p_dest_table);
PERFORM @extschema@.snapshot_destroyer(p_dest_table, 'ARCHIVE');
EXECUTE 'ALTER TABLE '||p_dest_table||' ADD COLUMN mimeo_source_deleted timestamptz';
v_insert_refresh_config := 'INSERT INTO @extschema@.refresh_config_logdel(source_table, dest_table, dblink, control, pk_field, pk_type, last_value) VALUES('
||quote_literal(p_src_table)||', '||quote_literal(p_dest_table)||', '|| p_dblink_id||', '||quote_literal('@extschema@.'||v_table_name||'_pgq')||', '
||quote_literal(p_pk_field)||', '||quote_literal(p_pk_type)||', '||quote_literal(clock_timestamp())||')';
RAISE NOTICE 'Inserting data into config table';
EXECUTE v_insert_refresh_config;
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
RAISE NOTICE 'Done';
EXCEPTION
WHEN OTHERS THEN
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_dblink_schema||''',''false'')';
v_conns := dblink_get_connections();
IF dblink_get_connections() @> '{mimeo_logdel}' THEN
PERFORM dblink_disconnect('mimeo_logdel');
END IF;
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
RAISE EXCEPTION '%', SQLERRM;
END
$$;
CREATE OR REPLACE FUNCTION refresh_dml(p_destination text, p_limit int default NULL, p_repull boolean DEFAULT false, p_debug boolean DEFAULT false) RETURNS void
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
v_adv_lock boolean;
v_cols_n_types text;
v_cols text;
v_control text;
v_create_f_sql text;
v_create_q_sql text;
v_dblink_schema text;
v_dblink text;
v_delete_sql text;
v_dest_table text;
v_exec_status text;
v_field text;
v_filter text[];
v_insert_sql text;
v_job_id int;
v_jobmon_schema text;
v_job_name text;
v_last_value_sql text;
v_limit int;
v_old_search_path text;
v_pk_counter int;
v_pk_field_csv text := '';
v_pk_field_type_csv text := '';
v_pk_field text[];
v_pk_type text[];
v_pk_where text;
v_remote_f_sql text;
v_remote_q_sql text;
v_rowcount bigint;
v_source_table text;
v_step_id int;
v_tmp_table text;
v_trigger_delete text;
v_trigger_update text;
v_with_update text;
BEGIN
IF p_debug IS DISTINCT FROM true THEN
PERFORM set_config( 'client_min_messages', 'warning', true );
END IF;
v_job_name := 'Refresh DML: '||p_destination;
SELECT nspname INTO v_dblink_schema FROM pg_namespace n, pg_extension e WHERE e.extname = 'dblink' AND e.extnamespace = n.oid;
SELECT nspname INTO v_jobmon_schema FROM pg_namespace n, pg_extension e WHERE e.extname = 'pg_jobmon' AND e.extnamespace = n.oid;
-- Set custom search path to allow easier calls to other functions, especially job logging
SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_jobmon_schema||','||v_dblink_schema||',public'',''false'')';
SELECT source_table
, dest_table
, 'tmp_'||replace(dest_table,'.','_')
, dblink
, control
, pk_field
, pk_type
, filter
, batch_limit
FROM refresh_config_dml
WHERE dest_table = p_destination INTO v_source_table, v_dest_table, v_tmp_table,
v_dblink, v_control, v_pk_field, v_pk_type, v_filter, v_limit;
IF NOT FOUND THEN
RAISE EXCEPTION 'ERROR: no mapping found for %',v_job_name;
END IF;
v_job_id := add_job(v_job_name);
PERFORM gdb(p_debug,'Job ID: '||v_job_id::text);
-- Take advisory lock to prevent multiple calls to function overlapping
v_adv_lock := pg_try_advisory_lock(hashtext('refresh_dml'), hashtext(v_job_name));
IF v_adv_lock = 'false' THEN
v_step_id := add_step(v_job_id,'Obtaining advisory lock for job: '||v_job_name);
PERFORM gdb(p_debug,'Obtaining advisory lock FAILED for job: '||v_job_name);
PERFORM update_step(v_step_id, 'OK','Found concurrent job. Exiting gracefully');
PERFORM close_job(v_job_id);
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
RETURN;
END IF;
v_step_id := add_step(v_job_id,'Building SQL');
IF v_pk_field IS NULL OR v_pk_type IS NULL THEN
RAISE EXCEPTION 'ERROR: primary key fields in refresh_config_dml must be defined';
END IF;
-- determine column list, column type list
IF v_filter IS NULL THEN
SELECT array_to_string(array_agg(attname),','), array_to_string(array_agg(attname||' '||atttypid::regtype::text),',') FROM
pg_attribute WHERE attnum > 0 AND attisdropped is false AND attrelid = p_destination::regclass INTO v_cols, v_cols_n_types;
ELSE
-- ensure all primary key columns are included in any column filters
FOREACH v_field IN ARRAY v_pk_field LOOP
IF v_field = ANY(v_filter) THEN
CONTINUE;
ELSE
RAISE EXCEPTION 'ERROR: filter list did not contain all columns that compose primary key for %',v_job_name;
END IF;
END LOOP;
SELECT array_to_string(array_agg(attname),','), array_to_string(array_agg(attname||' '||atttypid::regtype::text),',') FROM
(SELECT unnest(filter) FROM refresh_config_dml WHERE dest_table = p_destination) x
JOIN pg_attribute ON (unnest=attname::text AND attrelid=p_destination::regclass) INTO v_cols, v_cols_n_types;
END IF;
-- init sql statements
v_limit = COALESCE(p_limit, v_limit, 10000);
v_pk_field_csv := array_to_string(v_pk_field, ',');
v_pk_counter := 1;
WHILE v_pk_counter <= array_length(v_pk_field,1) LOOP
IF v_pk_counter > 1 THEN
v_pk_field_type_csv := v_pk_field_type_csv || ', ';
END IF;
v_pk_field_type_csv := v_pk_field_type_csv ||v_pk_field[v_pk_counter]||' '||v_pk_type[v_pk_counter];
v_pk_counter := v_pk_counter + 1;
END LOOP;
v_with_update := 'WITH a AS (SELECT '||v_pk_field_csv||' FROM '|| v_control ||' ORDER BY 1 LIMIT '|| v_limit ||') UPDATE '||v_control||' b SET processed = true FROM a WHERE a.'||v_pk_field[1]||' = b.'||v_pk_field[1];
v_pk_counter := 2;
IF array_length(v_pk_field, 1) > 1 THEN
v_pk_where := '';
WHILE v_pk_counter <= array_length(v_pk_field,1) LOOP
v_pk_where := v_pk_where || ' AND a.'||v_pk_field[v_pk_counter]||' = b.'||v_pk_field[v_pk_counter];
v_pk_counter := v_pk_counter + 1;
END LOOP;
END IF;
IF v_pk_where IS NOT NULL THEN
v_with_update := v_with_update || v_pk_where;
END IF;
PERFORM gdb(p_debug, v_with_update);
v_trigger_update := 'SELECT dblink_exec(auth('||v_dblink||'),'|| quote_literal(v_with_update)||')';
v_remote_q_sql := 'SELECT DISTINCT '||v_pk_field_csv||' FROM '||v_control||' WHERE processed = true';
IF p_repull THEN
v_remote_f_sql := 'SELECT '||v_cols||' FROM '||v_source_table;
-- Actual truncate is done after pull to temp table to minimize lock on dest_table
PERFORM update_step(v_step_id, 'OK','Request to repull ALL data from source. This could take a while...');
PERFORM gdb(p_debug, 'Request to repull ALL data from source. This could take a while...');
ELSE
v_remote_f_sql := 'SELECT '||v_cols||' FROM '||v_source_table||' JOIN ('||v_remote_q_sql||') x USING ('||v_pk_field_csv||')';
v_create_q_sql := 'CREATE TEMP TABLE '||v_tmp_table||'_queue AS SELECT '||v_pk_field_csv||'
FROM dblink(auth('||v_dblink||'),'||quote_literal(v_remote_q_sql)||') t ('||v_pk_field_type_csv||')';
v_delete_sql := 'DELETE FROM '||v_dest_table||' a USING '||v_tmp_table||'_queue b WHERE a.'||v_pk_field[1]||'= b.'||v_pk_field[1];
IF array_length(v_pk_field, 1) > 1 THEN
v_delete_sql := v_delete_sql || v_pk_where;
END IF;
PERFORM update_step(v_step_id, 'OK','Done');
END IF;
v_create_f_sql := 'CREATE TEMP TABLE '||v_tmp_table||'_full AS SELECT '||v_cols||'
FROM dblink(auth('||v_dblink||'),'||quote_literal(v_remote_f_sql)||') t ('||v_cols_n_types||')';
v_insert_sql := 'INSERT INTO '||v_dest_table||'('||v_cols||') SELECT '||v_cols||' FROM '||v_tmp_table||'_full';
v_trigger_delete := 'SELECT dblink_exec(auth('||v_dblink||'),'||quote_literal('DELETE FROM '||v_control||' WHERE processed = true')||')';
-- update remote entries
v_step_id := add_step(v_job_id,'Updating remote trigger table');
PERFORM gdb(p_debug,v_trigger_update);
EXECUTE v_trigger_update INTO v_exec_status;
PERFORM update_step(v_step_id, 'OK','Result was '||v_exec_status);
-- create temp tables
v_step_id := add_step(v_job_id,'Creating temp tables');
-- Full table with all insert/update data
PERFORM gdb(p_debug,v_create_f_sql);
EXECUTE v_create_f_sql;
-- Queue table with all rows to process (inserts, updates & deletes)
PERFORM gdb(p_debug,v_create_q_sql);
EXECUTE v_create_q_sql;
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
PERFORM gdb(p_debug,'Temp queue table row count '||v_rowcount::text);
IF v_rowcount < 1 THEN
PERFORM update_step(v_step_id, 'OK','No new rows found');
EXECUTE 'DROP TABLE IF EXISTS '||v_tmp_table||'_full';
PERFORM close_job(v_job_id);
-- Ensure old search path is reset for the current session
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
PERFORM pg_advisory_unlock(hashtext('refresh_dml'), hashtext(v_job_name));
RETURN;
END IF;
PERFORM update_step(v_step_id, 'OK','Number of rows to process: '||v_rowcount);
-- remove records from local table
IF p_repull THEN
v_step_id := add_step(v_job_id,'Truncating local table');
PERFORM gdb(p_debug,'Truncating local table');
EXECUTE 'TRUNCATE '||v_dest_table;
PERFORM update_step(v_step_id, 'OK','Done');
ELSE
v_step_id := add_step(v_job_id,'Deleting records from local table');
PERFORM gdb(p_debug,v_delete_sql);
EXECUTE v_delete_sql;
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
PERFORM gdb(p_debug,'Rows removed from local table before applying changes: '||v_rowcount::text);
PERFORM update_step(v_step_id, 'OK','Removed '||v_rowcount||' records');
END IF;
-- insert records to local table
v_step_id := add_step(v_job_id,'Inserting new records into local table');
PERFORM gdb(p_debug,v_insert_sql);
EXECUTE v_insert_sql;
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
PERFORM gdb(p_debug,'Rows inserted: '||v_rowcount::text);
PERFORM update_step(v_step_id, 'OK','Inserted '||v_rowcount||' records');
-- clean out rows from txn table
v_step_id := add_step(v_job_id,'Cleaning out rows from txn table');
PERFORM gdb(p_debug,v_trigger_delete);
EXECUTE v_trigger_delete INTO v_exec_status;
PERFORM update_step(v_step_id, 'OK','Result was '||v_exec_status);
-- update activity status
v_step_id := add_step(v_job_id,'Updating last_value in config table');
v_last_value_sql := 'UPDATE refresh_config_dml SET last_value = '|| quote_literal(current_timestamp::timestamp) ||' WHERE dest_table = ' ||quote_literal(p_destination);
PERFORM gdb(p_debug,v_last_value_sql);
EXECUTE v_last_value_sql;
PERFORM update_step(v_step_id, 'OK','Last Value was '||current_timestamp);
PERFORM close_job(v_job_id);
EXECUTE 'DROP TABLE IF EXISTS '||v_tmp_table||'_queue';
EXECUTE 'DROP TABLE IF EXISTS '||v_tmp_table||'_full';
-- Ensure old search path is reset for the current session
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
PERFORM pg_advisory_unlock(hashtext('refresh_dml'), hashtext(v_job_name));
EXCEPTION
WHEN QUERY_CANCELED THEN
PERFORM pg_advisory_unlock(hashtext('refresh_inserter'), hashtext(v_job_name));
RAISE EXCEPTION '%', SQLERRM;
WHEN OTHERS THEN
-- Exception block resets path, so have to reset it again
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_jobmon_schema||','||v_dblink_schema||''',''false'')';
IF v_step_id IS NULL THEN
v_step_id := add_step(v_job_id, 'EXCEPTION before first step logged');
END IF;
PERFORM update_step(v_step_id, 'BAD', 'ERROR: '||coalesce(SQLERRM,'unknown'));
PERFORM fail_job(v_job_id);
-- Ensure old search path is reset for the current session
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
PERFORM pg_advisory_unlock(hashtext('refresh_dml'), hashtext(v_job_name));
RAISE EXCEPTION '%', SQLERRM;
END
$$;
/*
* Refresh insert only table based on timestamp control field
*/
CREATE OR REPLACE FUNCTION refresh_inserter(p_destination text, p_limit integer DEFAULT NULL, p_repull boolean DEFAULT false, p_repull_start text DEFAULT NULL, p_repull_end text DEFAULT NULL, p_debug boolean DEFAULT false) RETURNS void
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
v_adv_lock boolean;
v_boundary timestamptz;
v_cols_n_types text;
v_cols text;
v_control text;
v_create_sql text;
v_dblink_schema text;
v_dblink text;
v_delete_sql text;
v_dest_table text;
v_dst_active boolean;
v_dst_check boolean;
v_dst_start int;
v_dst_end int;
v_filter text[];
v_full_refresh boolean := false;
v_insert_sql text;
v_job_id int;
v_jobmon_schema text;
v_job_name text;
v_last_value_sql text;
v_last_value timestamptz;
v_limit int;
v_now timestamptz := now();
v_old_search_path text;
v_remote_sql text;
v_rowcount bigint;
v_source_table text;
v_step_id int;
v_tmp_table text;
v_del_sql text;
BEGIN
IF p_debug IS DISTINCT FROM true THEN
PERFORM set_config( 'client_min_messages', 'warning', true );
END IF;
v_job_name := 'Refresh Inserter: '||p_destination;
SELECT nspname INTO v_dblink_schema FROM pg_namespace n, pg_extension e WHERE e.extname = 'dblink' AND e.extnamespace = n.oid;
SELECT nspname INTO v_jobmon_schema FROM pg_namespace n, pg_extension e WHERE e.extname = 'pg_jobmon' AND e.extnamespace = n.oid;
-- Set custom search path to allow easier calls to other functions, especially job logging
SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_jobmon_schema||','||v_dblink_schema||',public'',''false'')';
v_job_id := add_job(v_job_name);
PERFORM gdb(p_debug,'Job ID: '||v_job_id::text);
-- Take advisory lock to prevent multiple calls to function overlapping
v_adv_lock := pg_try_advisory_lock(hashtext('refresh_inserter'), hashtext(v_job_name));
IF v_adv_lock = 'false' THEN
v_step_id := add_step(v_job_id,'Obtaining advisory lock for job: '||v_job_name);
PERFORM gdb(p_debug,'Obtaining advisory lock FAILED for job: '||v_job_name);
PERFORM update_step(v_step_id, 'OK','Found concurrent job. Exiting gracefully');
PERFORM close_job(v_job_id);
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
RETURN;
END IF;
SELECT source_table
, dest_table
, 'tmp_'||replace(dest_table,'.','_')
, dblink
, control
, last_value
, now() - boundary::interval
, filter
, dst_active
, dst_start
, dst_end
, batch_limit
FROM refresh_config_inserter WHERE dest_table = p_destination
INTO v_source_table, v_dest_table, v_tmp_table, v_dblink, v_control
, v_last_value, v_boundary, v_filter, v_dst_active, v_dst_start, v_dst_end, v_limit;
IF NOT FOUND THEN
RAISE EXCEPTION 'ERROR: no mapping found for %',v_job_name;
END IF;
-- Do not allow this function to run during DST time change if config option is true. Otherwise will miss data from source
IF v_dst_active THEN
v_dst_check := @extschema@.dst_change(v_now);
IF v_dst_check THEN
IF to_number(to_char(v_now, 'HH24MM'), '0000') > v_dst_start AND to_number(to_char(v_now, 'HH24MM'), '0000') < v_dst_end THEN
v_step_id := jobmon.add_step( v_job_id, 'DST Check');
PERFORM jobmon.update_step(v_step_id, 'OK', 'Job CANCELLED - Does not run during DST time change');
PERFORM jobmon.close_job(v_job_id);
PERFORM gdb(p_debug, 'Cannot run during DST time change');
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
PERFORM pg_advisory_unlock(hashtext('refresh_inserter'), hashtext(v_job_name));
RETURN;
END IF;
END IF;
END IF;
v_step_id := add_step(v_job_id,'Building SQL');
IF v_filter IS NULL THEN
SELECT array_to_string(array_agg(attname),','), array_to_string(array_agg(attname||' '||atttypid::regtype::text),',') FROM
pg_attribute WHERE attnum > 0 AND attisdropped is false AND attrelid = p_destination::regclass INTO v_cols, v_cols_n_types;
ELSE
SELECT array_to_string(array_agg(attname),','), array_to_string(array_agg(attname||' '||atttypid::regtype::text),',') FROM
(SELECT unnest(filter) FROM @extschema@.refresh_config_inserter WHERE dest_table = p_destination) x
JOIN pg_attribute ON (unnest=attname::text AND attrelid=p_destination::regclass) INTO v_cols, v_cols_n_types;
END IF;
-- init sql statements
v_last_value_sql := 'SELECT max('||v_control||') FROM '||v_tmp_table;
v_limit = COALESCE(p_limit, v_limit, 10000);
-- Repull old data instead of normal new data pull
IF p_repull THEN
-- Repull ALL data if no start and end values set
IF p_repull_start IS NULL AND p_repull_end IS NULL THEN
-- Actual truncate is done after pull to temp table to minimize lock on dest_table
PERFORM update_step(v_step_id, 'OK','Request to repull ALL data from source. This could take a while...');
v_full_refresh := true;
v_remote_sql := 'SELECT '||v_cols||' FROM '||v_source_table;
ELSE
PERFORM update_step(v_step_id, 'OK','Request to repull data from '||p_repull_start||' to '||p_repull_end);
PERFORM gdb(p_debug,'Request to repull data from '||p_repull_start||' to '||p_repull_end);
v_remote_sql := 'SELECT '||v_cols||' FROM '||v_source_table||' WHERE '||v_control||' > '||quote_literal(p_repull_start)||' AND '||v_control||' < '||quote_literal(p_repull_end);
-- Delete the old local data
v_delete_sql := 'DELETE FROM '||v_dest_table||' WHERE '||v_control||' > '||quote_literal(p_repull_start)||' AND '||v_control||' < '||quote_literal(p_repull_end);
v_step_id := add_step(v_job_id, 'Deleting current, local data');
PERFORM gdb(p_debug,'Deleting current, local data');
EXECUTE v_delete_sql;
PERFORM update_step(v_step_id, 'OK','Done');
-- Set last_value equal to local, real table max instead of temp table (just in case)
v_last_value_sql := 'SELECT max('||v_control||') FROM '||v_dest_table;
END IF;
ELSE
-- does < for upper boundary to keep missing data from happening on rare edge case where a newly inserted row outside the transaction batch
-- has the exact same timestamp as the previous batch's max timestamp
v_remote_sql := 'SELECT '||v_cols||' FROM '||v_source_table||' WHERE '||v_control||' > '||quote_literal(v_last_value)||' AND '||v_control||' < '||quote_literal(v_boundary)||' ORDER BY '||v_control||' ASC LIMIT '|| v_limit;
PERFORM update_step(v_step_id, 'OK','Grabbing rows from '||v_last_value::text||' to '||v_boundary::text);
PERFORM gdb(p_debug,'Grabbing rows from '||v_last_value::text||' to '||v_boundary::text);
END IF;
v_create_sql := 'CREATE TEMP TABLE '||v_tmp_table||' AS SELECT '||v_cols||' FROM dblink(auth('||v_dblink||'),'||quote_literal(v_remote_sql)||') t ('||v_cols_n_types||')';
v_insert_sql := 'INSERT INTO '||v_dest_table||'('||v_cols||') SELECT '||v_cols||' FROM '||v_tmp_table;
-- create temp from remote
v_step_id := add_step(v_job_id,'Creating temp table ('||v_tmp_table||') from remote table');
PERFORM gdb(p_debug,v_create_sql);
EXECUTE v_create_sql;
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
-- Do nothing if no new rows
IF v_rowcount < 1 THEN
PERFORM update_step(v_step_id, 'OK','No new rows found');
EXECUTE 'DROP TABLE IF EXISTS ' || v_tmp_table;
PERFORM close_job(v_job_id);
PERFORM gdb(p_debug, 'No new rows found');
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
PERFORM pg_advisory_unlock(hashtext('refresh_inserter'), hashtext(v_job_name));
RETURN;
-- Not recommended that the batch actually equal the limit set if possible. Handle all edge cases to keep data consistent
ELSIF (v_rowcount = v_limit) AND (p_repull = false) THEN
PERFORM update_step(v_step_id, 'WARNING','Row count fetched equal to limit set: '||v_limit||'. Recommend increasing batch limit if possible.');
PERFORM gdb(p_debug, 'Row count fetched equal to limit set: '||v_limit||'. Recommend increasing batch limit if possible.');
EXECUTE v_last_value_sql INTO v_last_value;
v_step_id := add_step(v_job_id, 'Removing high boundary rows from this batch to avoid missing data');
EXECUTE 'DELETE FROM '||v_tmp_table||' WHERE '||v_control||' = '||quote_literal(v_last_value);
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
PERFORM update_step(v_step_id, 'OK', 'Removed '||v_rowcount||' rows. Batch now contains '||v_limit - v_rowcount||' records');
PERFORM gdb(p_debug, 'Removed '||v_rowcount||' rows from batch. Batch table now contains '||v_limit - v_rowcount||' records');
IF (v_limit - v_rowcount) < 1 THEN
v_step_id := add_step(v_job_id, 'Reached inconsistent state');
PERFORM update_step(v_step_id, 'CRITICAL', 'Batch contained max rows ('||v_limit||') and all contained the same timestamp value. Unable to guarentee rows will ever be replicated consistently. Increase row limit parameter to allow a consistent batch.');
PERFORM gdb(p_debug, 'Batch contained max rows desired ('||v_limit||') and all contained the same timestamp value. Unable to guarentee rows will be replicated consistently. Increase row limit parameter to allow a consistent batch.');
PERFORM fail_job(v_job_id);
EXECUTE 'DROP TABLE IF EXISTS ' || v_tmp_table;
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
PERFORM pg_advisory_unlock(hashtext('refresh_inserter'), hashtext(v_job_name));
RETURN;
END IF;
ELSE
PERFORM update_step(v_step_id, 'OK','Batch contains '||v_rowcount||' records');
PERFORM gdb(p_debug, 'Batch contains '||v_rowcount||' records');
END IF;
IF v_full_refresh THEN
EXECUTE 'TRUNCATE '||v_dest_table;
END IF;
-- insert
v_step_id := add_step(v_job_id,'Inserting new records into local table');
PERFORM gdb(p_debug,v_insert_sql);
EXECUTE v_insert_sql;
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
PERFORM update_step(v_step_id, 'OK','Inserted '||v_rowcount||' records');
PERFORM gdb(p_debug, v_rowcount || ' rows added to ' || v_dest_table);
-- Get new last_value
v_step_id := add_step(v_job_id, 'Getting local max control field value for next lower boundary');
PERFORM gdb(p_debug, v_last_value_sql);
EXECUTE v_last_value_sql INTO v_last_value;
PERFORM update_step(v_step_id, 'OK','Max value is: '||v_last_value);
PERFORM gdb(p_debug, 'Max value is: '||v_last_value);
-- update boundries
v_step_id := add_step(v_job_id,'Updating last_value in config');
UPDATE refresh_config_inserter set last_value = v_last_value WHERE dest_table = p_destination;
PERFORM update_step(v_step_id, 'OK','Done');
EXECUTE 'DROP TABLE IF EXISTS ' || v_tmp_table;
PERFORM close_job(v_job_id);
-- Ensure old search path is reset for the current session
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
PERFORM pg_advisory_unlock(hashtext('refresh_inserter'), hashtext(v_job_name));
EXCEPTION
WHEN QUERY_CANCELED THEN
PERFORM pg_advisory_unlock(hashtext('refresh_inserter'), hashtext(v_job_name));
RAISE EXCEPTION '%', SQLERRM;
WHEN OTHERS THEN
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_jobmon_schema||','||v_dblink_schema||''',''false'')';
IF v_step_id IS NULL THEN
v_step_id := jobmon.add_step(v_job_id, 'EXCEPTION before first step logged');
END IF;
PERFORM update_step(v_step_id, 'BAD', 'ERROR: '||coalesce(SQLERRM,'unknown'));
PERFORM fail_job(v_job_id);
-- Ensure old search path is reset for the current session
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
PERFORM pg_advisory_unlock(hashtext('refresh_inserter'), hashtext(v_job_name));
RAISE EXCEPTION '%', SQLERRM;
END
$$;
/*
* Refresh based on DML (Insert, Update, Delete), but logs all deletes on the destination table
* Destination table requires extra column: mimeo_source_deleted timestamptz
*/
CREATE OR REPLACE FUNCTION refresh_logdel(p_destination text, p_limit int default NULL, p_debug boolean DEFAULT false) RETURNS void
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
v_adv_lock boolean;
v_cols_n_types text;
v_cols text;
v_control text;
v_create_d_sql text;
v_create_f_sql text;
v_dblink_schema text;
v_dblink text;
v_delete_d_sql text;
v_delete_f_sql text;
v_dest_table text;
v_exec_status text;
v_field text;
v_filter text[];
v_insert_deleted_sql text;
v_insert_sql text;
v_job_id int;
v_jobmon_schema text;
v_job_name text;
v_last_value_sql text;
v_limit int;
v_old_search_path text;
v_pk_counter int := 2;
v_pk_field_csv text;
v_pk_field text[];
v_pk_type text[];
v_pk_where text;
v_remote_d_sql text;
v_remote_f_sql text;
v_remote_q_sql text;
v_full_rowcount bigint;
v_rowcount bigint;
v_source_table text;
v_step_id int;
v_tmp_table text;
v_trigger_delete text;
v_trigger_update text;
v_with_update text;
BEGIN
IF p_debug IS DISTINCT FROM true THEN
PERFORM set_config( 'client_min_messages', 'warning', true );
END IF;
v_job_name := 'Refresh Log Del: '||p_destination;
SELECT nspname INTO v_dblink_schema FROM pg_namespace n, pg_extension e WHERE e.extname = 'dblink' AND e.extnamespace = n.oid;
SELECT nspname INTO v_jobmon_schema FROM pg_namespace n, pg_extension e WHERE e.extname = 'pg_jobmon' AND e.extnamespace = n.oid;
-- Set custom search path to allow easier calls to other functions, especially job logging
SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_jobmon_schema||','||v_dblink_schema||',public'',''false'')';
SELECT source_table
, dest_table
, 'tmp_'||replace(dest_table,'.','_')
, dblink
, control
, pk_field
, pk_type
, filter
, batch_limit
FROM refresh_config_logdel
WHERE dest_table = p_destination INTO v_source_table, v_dest_table, v_tmp_table,
v_dblink, v_control, v_pk_field, v_pk_type, v_filter, v_limit;
IF NOT FOUND THEN
RAISE EXCEPTION 'ERROR: no mapping found for %',v_job_name;
END IF;
v_job_id := add_job(v_job_name);
PERFORM gdb(p_debug,'Job ID: '||v_job_id::text);
-- Take advisory lock to prevent multiple calls to function overlapping
v_adv_lock := pg_try_advisory_lock(hashtext('refresh_logdel'), hashtext(v_job_name));
IF v_adv_lock = 'false' THEN
v_step_id := add_step(v_job_id,'Obtaining advisory lock for job: '||v_job_name);
PERFORM gdb(p_debug,'Obtaining advisory lock FAILED for job: '||v_job_name);
PERFORM update_step(v_step_id, 'OK','Found concurrent job. Exiting gracefully');
PERFORM close_job(v_job_id);
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
RETURN;
END IF;
v_step_id := add_step(v_job_id,'Grabbing Boundries, Building SQL');
IF v_pk_field IS NULL OR v_pk_type IS NULL THEN
RAISE EXCEPTION 'ERROR: primary key fields in refresh_config_logdel must be defined';
END IF;
-- determine column list, column type list
IF v_filter IS NULL THEN
SELECT array_to_string(array_agg(attname),','), array_to_string(array_agg(attname||' '||atttypid::regtype::text),',') FROM
pg_attribute WHERE attnum > 0 AND attisdropped is false AND attrelid = p_destination::regclass AND attname != 'mimeo_source_deleted' INTO v_cols, v_cols_n_types;
ELSE
-- ensure all primary key columns are included in any column filters
FOREACH v_field IN ARRAY v_pk_field LOOP
IF v_field = ANY(v_filter) THEN
CONTINUE;
ELSE
RAISE EXCEPTION 'ERROR: filter list did not contain all columns that compose primary key for %',v_job_name;
END IF;
END LOOP;
SELECT array_to_string(array_agg(attname),','), array_to_string(array_agg(attname||' '||atttypid::regtype::text),',') FROM
(SELECT unnest(filter) FROM refresh_config_logdel WHERE dest_table = p_destination) x
JOIN pg_attribute ON (unnest=attname::text AND attrelid=p_destination::regclass) WHERE attname != 'mimeo_source_deleted' INTO v_cols, v_cols_n_types;
END IF;
-- init sql statements
v_limit = COALESCE(p_limit, v_limit, 10000);
v_pk_field_csv := array_to_string(v_pk_field,',');
v_with_update := 'WITH a AS (SELECT '||v_pk_field_csv||' FROM '|| v_control ||' ORDER BY 1 LIMIT '|| v_limit ||') UPDATE '||v_control||' b SET processed = true FROM a WHERE a.'||v_pk_field[1]||' = b.'||v_pk_field[1];
IF array_length(v_pk_field, 1) > 1 THEN
v_pk_where := '';
WHILE v_pk_counter <= array_length(v_pk_field,1) LOOP
v_pk_where := v_pk_where || ' AND a.'||v_pk_field[v_pk_counter]||' = b.'||v_pk_field[v_pk_counter];
v_pk_counter := v_pk_counter + 1;
END LOOP;
END IF;
IF v_pk_where IS NOT NULL THEN
v_with_update := v_with_update || v_pk_where;
END IF;
PERFORM gdb(p_debug, v_with_update);
v_trigger_update := 'SELECT dblink_exec(auth('||v_dblink||'),'|| quote_literal(v_with_update)||')';
RAISE NOTICE 'v_trigger_update: %', v_trigger_update;
v_remote_q_sql := 'SELECT DISTINCT '||v_pk_field_csv||' FROM '||v_control||' WHERE processed = true and mimeo_source_deleted IS NULL';
RAISE NOTICE 'v_remote_q_sql: %', v_remote_q_sql;
v_remote_f_sql := 'SELECT '||v_cols||' FROM '||v_source_table||' JOIN ('||v_remote_q_sql||') x USING ('||v_pk_field_csv||')';
RAISE NOTICE 'v_remote_f_sql: %', v_remote_f_sql;
v_create_f_sql := 'CREATE TEMP TABLE '||v_tmp_table||'_full AS SELECT '||v_cols||'
FROM dblink(auth('||v_dblink||'),'||quote_literal(v_remote_f_sql)||') t ('||v_cols_n_types||')';
RAISE NOTICE 'v_remote_f_sql: %', v_remote_f_sql;
v_remote_d_sql = 'SELECT '||v_cols||', mimeo_source_deleted FROM '||v_control||' WHERE processed = true and mimeo_source_deleted IS NOT NULL';
v_create_d_sql = 'CREATE TEMP TABLE '||v_tmp_table||'_deleted AS SELECT '||v_cols||', mimeo_source_deleted
FROM dblink(auth('||v_dblink||'),'||quote_literal(v_remote_d_sql)||') t ('||v_cols_n_types||', mimeo_source_deleted timestamptz)';
v_delete_f_sql := 'DELETE FROM '||v_dest_table||' a USING '||v_tmp_table||'_full b WHERE a.'||v_pk_field[1]||'= b.'||v_pk_field[1];
IF array_length(v_pk_field, 1) > 1 THEN
v_delete_f_sql := v_delete_f_sql || v_pk_where;
END IF;
-- remove rows that were deleted on source to ensure most recently deleted data is logged
v_delete_d_sql := 'DELETE FROM '||v_dest_table||' a USING '||v_tmp_table||'_deleted b WHERE a.'||v_pk_field[1]||'= b.'||v_pk_field[1];
IF array_length(v_pk_field, 1) > 1 THEN
v_delete_d_sql := v_delete_d_sql || v_pk_where;
END IF;
v_insert_sql := 'INSERT INTO '||v_dest_table||'('||v_cols||') SELECT '||v_cols||' FROM '||v_tmp_table||'_full';
v_insert_deleted_sql := 'INSERT INTO '||v_dest_table||'('||v_cols||', mimeo_source_deleted) SELECT '||v_cols||', mimeo_source_deleted FROM '||v_tmp_table||'_deleted';
v_trigger_delete := 'SELECT dblink_exec(auth('||v_dblink||'),'||quote_literal('DELETE FROM '||v_control||' WHERE processed = true')||')';
PERFORM update_step(v_step_id, 'OK','Remote table is '||v_source_table);
-- update remote entries
v_step_id := add_step(v_job_id,'Updating remote trigger table');
PERFORM gdb(p_debug,v_trigger_update);
EXECUTE v_trigger_update INTO v_exec_status;
PERFORM update_step(v_step_id, 'OK','Result was '||v_exec_status);
-- create temp table for insertion (inserts/updates)
v_step_id := add_step(v_job_id,'Create temp table from remote full table');
PERFORM gdb(p_debug,v_create_f_sql);
EXECUTE v_create_f_sql;
GET DIAGNOSTICS v_full_rowcount = ROW_COUNT;
PERFORM gdb(p_debug,'Insert/Update Temp table row count '||v_full_rowcount::text);
PERFORM update_step(v_step_id, 'OK','Table contains '||v_full_rowcount||' records');
-- create temp table for insertion (deleted rows)
v_step_id := add_step(v_job_id,'Create temp table from remote delete table');
PERFORM gdb(p_debug,v_create_d_sql);
EXECUTE v_create_d_sql;
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
PERFORM gdb(p_debug,'Delete Temp table row count '||v_rowcount::text);
-- Check is here instead of earlier in case there are only deletes
IF v_rowcount < 1 AND v_full_rowcount < 1 THEN
PERFORM update_step(v_step_id, 'OK','No new rows found');
EXECUTE 'DROP TABLE IF EXISTS '||v_tmp_table||'_full';
EXECUTE 'DROP TABLE IF EXISTS '||v_tmp_table||'_deleted';
PERFORM close_job(v_job_id);
-- Ensure old search path is reset for the current session
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
PERFORM pg_advisory_unlock(hashtext('refresh_logdel'), hashtext(v_job_name));
RETURN;
END IF;
PERFORM update_step(v_step_id, 'OK','Table contains '||v_rowcount||' records');
-- remove records from local table (inserts/updates)
v_step_id := add_step(v_job_id,'Deleting insert/update records from local table');
PERFORM gdb(p_debug,v_delete_f_sql);
EXECUTE v_delete_f_sql;
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
PERFORM gdb(p_debug,'Insert/Update rows removed from local table before applying changes: '||v_rowcount::text);
PERFORM update_step(v_step_id, 'OK','Removed '||v_rowcount||' records');
-- remove records from local table (deleted rows)
v_step_id := add_step(v_job_id,'Deleting removed records from local table');
PERFORM gdb(p_debug,v_delete_d_sql);
EXECUTE v_delete_d_sql;
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
PERFORM gdb(p_debug,'Deleted Rows removed from local table before applying changes: '||v_rowcount::text);
PERFORM update_step(v_step_id, 'OK','Removed '||v_rowcount||' records');
-- insert records to local table (inserts/updates)
v_step_id := add_step(v_job_id,'Inserting new/updated records into local table');
PERFORM gdb(p_debug,v_insert_sql);
EXECUTE v_insert_sql;
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
PERFORM gdb(p_debug,'Rows inserted: '||v_rowcount::text);
PERFORM update_step(v_step_id, 'OK','Inserted '||v_rowcount||' records');
-- insert records to local table (deleted rows to be kepts)
v_step_id := add_step(v_job_id,'Inserting deleted records into local table');
PERFORM gdb(p_debug,v_insert_deleted_sql);
EXECUTE v_insert_deleted_sql;
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
PERFORM gdb(p_debug,'Rows inserted: '||v_rowcount::text);
PERFORM update_step(v_step_id, 'OK','Inserted '||v_rowcount||' records');
-- clean out rows from txn table
v_step_id := add_step(v_job_id,'Cleaning out rows from txn table');
PERFORM gdb(p_debug,v_trigger_delete);
EXECUTE v_trigger_delete INTO v_exec_status;
PERFORM update_step(v_step_id, 'OK','Result was '||v_exec_status);
-- update activity status
v_step_id := add_step(v_job_id,'Updating last_value in config table');
v_last_value_sql := 'UPDATE refresh_config_logdel SET last_value = '|| quote_literal(current_timestamp::timestamp) ||' WHERE dest_table = ' ||quote_literal(p_destination);
PERFORM gdb(p_debug,v_last_value_sql);
EXECUTE v_last_value_sql;
PERFORM update_step(v_step_id, 'OK','Last Value was '||current_timestamp);
PERFORM close_job(v_job_id);
EXECUTE 'DROP TABLE IF EXISTS '||v_tmp_table||'_full';
EXECUTE 'DROP TABLE IF EXISTS '||v_tmp_table||'_deleted';
-- Ensure old search path is reset for the current session
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
PERFORM pg_advisory_unlock(hashtext('refresh_logdel'), hashtext(v_job_name));
EXCEPTION
WHEN QUERY_CANCELED THEN
PERFORM pg_advisory_unlock(hashtext('refresh_inserter'), hashtext(v_job_name));
RAISE EXCEPTION '%', SQLERRM;
WHEN OTHERS THEN
-- Exception block resets path, so have to reset it again
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_jobmon_schema||','||v_dblink_schema||''',''false'')';
IF v_step_id IS NULL THEN
v_step_id := jobmon.add_step(v_job_id, 'EXCEPTION before first step logged');
END IF;
PERFORM update_step(v_step_id, 'BAD', 'ERROR: '||coalesce(SQLERRM,'unknown'));
PERFORM fail_job(v_job_id);
-- Ensure old search path is reset for the current session
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
PERFORM pg_advisory_unlock(hashtext('refresh_logdel'), hashtext(v_job_name));
RAISE EXCEPTION '%', SQLERRM;
END
$$;
/*
* Snap refresh to repull all table data
*/
CREATE OR REPLACE FUNCTION refresh_snap(p_destination text, p_debug boolean DEFAULT false) RETURNS void
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
v_adv_lock boolean;
v_cols_n_types text;
v_cols text;
v_create_sql text;
v_dblink_schema text;
v_dblink text;
v_dest_table text;
v_exists int;
v_insert_sql text;
v_job_id int;
v_jobmon_schema text;
v_job_name text;
v_lcols_array text[];
v_local_sql text;
v_l text;
v_match boolean := 'f';
v_old_search_path text;
v_parts record;
v_post_script text[];
v_rcols_array text[];
v_refresh_snap text;
v_remote_sql text;
v_rowcount bigint;
v_r text;
v_snap text;
v_source_table text;
v_step_id int;
v_table_exists int;
v_view_definition text;
BEGIN
IF p_debug IS DISTINCT FROM true THEN
PERFORM set_config( 'client_min_messages', 'notice', true );
END IF;
v_job_name := 'Refresh Snap: '||p_destination;
SELECT nspname INTO v_dblink_schema FROM pg_namespace n, pg_extension e WHERE e.extname = 'dblink' AND e.extnamespace = n.oid;
SELECT nspname INTO v_jobmon_schema FROM pg_namespace n, pg_extension e WHERE e.extname = 'pg_jobmon' AND e.extnamespace = n.oid;
-- Set custom search path to allow easier calls to other functions, especially job logging
SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_jobmon_schema||','||v_dblink_schema||',public'',''false'')';
v_job_id := add_job(v_job_name);
PERFORM gdb(p_debug,'Job ID: '||v_job_id::text);
-- Take advisory lock to prevent multiple calls to function overlapping and causing possible deadlock
v_adv_lock := pg_try_advisory_lock(hashtext('refresh_snap'), hashtext(v_job_name));
IF v_adv_lock = 'false' THEN
v_step_id := add_step(v_job_id,'Obtaining advisory lock for job: '||v_job_name);
PERFORM gdb(p_debug,'Obtaining advisory lock FAILED for job: '||v_job_name);
PERFORM update_step(v_step_id, 'OK','Found concurrent job. Exiting gracefully');
PERFORM close_job(v_job_id);
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
RETURN;
END IF;
v_step_id := add_step(v_job_id,'Grabbing Mapping, Building SQL');
SELECT source_table, dest_table, dblink, post_script INTO v_source_table, v_dest_table, v_dblink, v_post_script FROM refresh_config_snap
WHERE dest_table = p_destination;
IF NOT FOUND THEN
RAISE EXCEPTION 'ERROR: This table is not set up for snapshot replication: %',v_job_name;
END IF;
-- checking for current view
SELECT definition INTO v_view_definition FROM pg_views where
((schemaname || '.') || viewname)=v_dest_table;
v_exists := strpos(v_view_definition, 'snap1');
IF v_exists > 0 THEN
v_snap := '_snap2';
ELSE
v_snap := '_snap1';
END IF;
v_refresh_snap := v_dest_table||v_snap;
PERFORM gdb(p_debug,'v_refresh_snap: '||v_refresh_snap::text);
-- init sql statements
v_remote_sql := 'SELECT array_to_string(array_agg(attname),'','') as cols, array_to_string(array_agg(attname||'' ''||atttypid::regtype::text),'','') as cols_n_types FROM pg_attribute WHERE attnum > 0 AND attisdropped is false AND attrelid = ' || quote_literal(v_source_table) || '::regclass';
v_remote_sql := 'SELECT cols, cols_n_types FROM dblink(auth(' || v_dblink || '), ' || quote_literal(v_remote_sql) || ') t (cols text, cols_n_types text)';
perform gdb(p_debug,'v_remote_sql: '||v_remote_sql);
EXECUTE v_remote_sql INTO v_cols, v_cols_n_types;
perform gdb(p_debug,'v_cols: '||v_cols);
perform gdb(p_debug,'v_cols_n_types: '||v_cols_n_types);
v_remote_sql := 'SELECT '||v_cols||' FROM '||v_source_table;
v_insert_sql := 'INSERT INTO ' || v_refresh_snap || ' SELECT '||v_cols||' FROM dblink(auth('||v_dblink||'),'||quote_literal(v_remote_sql)||') t ('||v_cols_n_types||')';
PERFORM update_step(v_step_id, 'OK','Done');
v_step_id := add_step(v_job_id,'Truncate non-active snap table');
-- Create snap table if it doesn't exist
SELECT string_to_array(v_refresh_snap, '.') AS oparts INTO v_parts;
SELECT INTO v_table_exists count(1) FROM pg_tables
WHERE schemaname = v_parts.oparts[1] AND
tablename = v_parts.oparts[2];
IF v_table_exists = 0 THEN
PERFORM gdb(p_debug,'Snap table does not exist. Creating... ');
v_create_sql := 'CREATE TABLE ' || v_refresh_snap || ' (' || v_cols_n_types || ')';
perform gdb(p_debug,'v_create_sql: '||v_create_sql::text);
EXECUTE v_create_sql;
ELSE
/* Check local column definitions against remote and recreate table if different. Allows automatic recreation of
snap tables if columns change (add, drop type change) */
v_local_sql := 'SELECT array_agg(attname||'' ''||atttypid::regtype::text) as cols_n_types FROM pg_attribute WHERE attnum > 0 AND attisdropped is false AND attrelid = ' || quote_literal(v_refresh_snap) || '::regclass';
PERFORM gdb(p_debug,'v_local_sql: '||v_local_sql::text);
EXECUTE v_local_sql INTO v_lcols_array;
SELECT string_to_array(v_cols_n_types, ',') AS cols INTO v_rcols_array;
-- Check to see if there's a change in the column structure on the remote
FOREACH v_r IN ARRAY v_rcols_array LOOP
v_match := 'f';
FOREACH v_l IN ARRAY v_lcols_array LOOP
IF v_r = v_l THEN
v_match := 't';
EXIT;
END IF;
END LOOP;
END LOOP;
IF v_match = 'f' THEN
EXECUTE 'DROP TABLE ' || v_refresh_snap;
EXECUTE 'DROP VIEW ' || v_dest_table;
v_create_sql := 'CREATE TABLE ' || v_refresh_snap || ' (' || v_cols_n_types || ')';
PERFORM gdb(p_debug,'v_create_sql: '||v_create_sql::text);
EXECUTE v_create_sql;
v_step_id := add_step(v_job_id,'Source table structure changed.');
PERFORM update_step(v_step_id, 'OK','Tables and view dropped and recreated. Please double-check snap table attributes (permissions, indexes, etc');
PERFORM gdb(p_debug,'Source table structure changed. Tables and view dropped and recreated. Please double-check snap table attributes (permissions, indexes, etc)');
END IF;
-- truncate non-active snap table
EXECUTE 'TRUNCATE TABLE ' || v_refresh_snap;
PERFORM update_step(v_step_id, 'OK','Done');
END IF;
-- populating snap table
v_step_id := add_step(v_job_id,'Inserting records into local table');
PERFORM gdb(p_debug,'Inserting rows... '||v_insert_sql);
EXECUTE v_insert_sql;
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
PERFORM update_step(v_step_id, 'OK','Inserted '||v_rowcount||' records');
IF v_rowcount IS NOT NULL THEN
EXECUTE 'ANALYZE ' ||v_refresh_snap;
SET statement_timeout='30 min';
-- swap view
v_step_id := add_step(v_job_id,'Swap view to '||v_refresh_snap);
PERFORM gdb(p_debug,'Swapping view to '||v_refresh_snap);
EXECUTE 'CREATE OR REPLACE VIEW '||v_dest_table||' AS SELECT * FROM '||v_refresh_snap;
PERFORM update_step(v_step_id, 'OK','View Swapped');
v_step_id := add_step(v_job_id,'Updating last value');
UPDATE refresh_config_snap set last_value = now() WHERE dest_table = p_destination;
PERFORM update_step(v_step_id, 'OK','Done');
-- Runs special sql to fix indexes, permissions, etc on recreated objects
IF v_match = 'f' AND v_post_script IS NOT NULL THEN
v_step_id := add_step(v_job_id,'Applying post_script sql commands due to schema change');
PERFORM @extschema@.post_script(v_dest_table);
PERFORM update_step(v_step_id, 'OK','Done');
END IF;
PERFORM close_job(v_job_id);
ELSE
RAISE EXCEPTION 'No rows found in source table';
END IF;
-- Ensure old search path is reset for the current session
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
PERFORM pg_advisory_unlock(hashtext('refresh_snap'), hashtext(v_job_name));
EXCEPTION
WHEN QUERY_CANCELED THEN
PERFORM pg_advisory_unlock(hashtext('refresh_inserter'), hashtext(v_job_name));
RAISE EXCEPTION '%', SQLERRM;
WHEN OTHERS THEN
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_jobmon_schema||','||v_dblink_schema||''',''false'')';
IF v_step_id IS NULL THEN
v_step_id := jobmon.add_step(v_job_id, 'EXCEPTION before first step logged');
END IF;
PERFORM update_step(v_step_id, 'BAD', 'ERROR: '||coalesce(SQLERRM,'unknown'));
PERFORM fail_job(v_job_id);
-- Ensure old search path is reset for the current session
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
PERFORM pg_advisory_unlock(hashtext('refresh_snap'), hashtext(v_job_name));
RAISE EXCEPTION '%', SQLERRM;
END
$$;
/*
* Refresh insert/update only table based on timestamp control field
*/
CREATE OR REPLACE FUNCTION refresh_updater(p_destination text, p_limit integer DEFAULT NULL, p_repull boolean DEFAULT false, p_repull_start text DEFAULT NULL, p_repull_end text DEFAULT NULL, p_debug boolean DEFAULT false) RETURNS void
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
v_adv_lock boolean;
v_boundary_sql text;
v_boundary timestamptz;
v_cols_n_types text;
v_cols text;
v_control text;
v_create_sql text;
v_dblink_schema text;
v_dblink text;
v_delete_sql text;
v_dest_table text;
v_dst_active boolean;
v_dst_check boolean;
v_dst_start int;
v_dst_end int;
v_field text;
v_filter text[];
v_full_refresh boolean := false;
v_insert_sql text;
v_job_id int;
v_jobmon_schema text;
v_job_name text;
v_last_value_sql text;
v_last_value timestamptz;
v_limit int;
v_now timestamptz := now();
v_old_search_path text;
v_pk_counter int := 2;
v_pk_field text[];
v_pk_type text[];
v_pk_where text;
v_remote_boundry_sql text;
v_remote_boundry timestamptz;
v_remote_sql text;
v_rowcount bigint;
v_source_table text;
v_step_id int;
v_tmp_table text;
BEGIN
IF p_debug IS DISTINCT FROM true THEN
PERFORM set_config( 'client_min_messages', 'warning', true );
END IF;
v_job_name := 'Refresh Updater: '||p_destination;
SELECT nspname INTO v_dblink_schema FROM pg_namespace n, pg_extension e WHERE e.extname = 'dblink' AND e.extnamespace = n.oid;
SELECT nspname INTO v_jobmon_schema FROM pg_namespace n, pg_extension e WHERE e.extname = 'pg_jobmon' AND e.extnamespace = n.oid;
-- Set custom search path to allow easier calls to other functions, especially job logging
SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_jobmon_schema||','||v_dblink_schema||',public'',''false'')';
v_job_id := add_job(v_job_name);
PERFORM gdb(p_debug,'Job ID: '||v_job_id::text);
-- Take advisory lock to prevent multiple calls to function overlapping
v_adv_lock := pg_try_advisory_lock(hashtext('refresh_updater'), hashtext(v_job_name));
IF v_adv_lock = 'false' THEN
v_step_id := add_step(v_job_id,'Obtaining advisory lock for job: '||v_job_name);
PERFORM gdb(p_debug,'Obtaining advisory lock FAILED for job: '||v_job_name);
PERFORM update_step(v_step_id, 'OK','Found concurrent job. Exiting gracefully');
PERFORM close_job(v_job_id);
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
RETURN;
END IF;
-- grab boundry
SELECT source_table
, dest_table
, 'tmp_'||replace(dest_table,'.','_')
, dblink, control
, last_value
, now() - boundary::interval
, pk_field
, pk_type
, filter
, dst_active
, dst_start
, dst_end
, batch_limit
FROM refresh_config_updater
WHERE dest_table = p_destination INTO v_source_table, v_dest_table, v_tmp_table, v_dblink, v_control,
v_last_value, v_boundary, v_pk_field, v_pk_type, v_filter, v_dst_active, v_dst_start, v_dst_end, v_limit;
IF NOT FOUND THEN
RAISE EXCEPTION 'ERROR: no mapping found for %',v_job_name;
END IF;
-- Do not allow this function to run during DST time change if config option is true. Otherwise will miss data from source
IF v_dst_active THEN
v_dst_check := @extschema@.dst_change(v_now);
IF v_dst_check THEN
IF to_number(to_char(v_now, 'HH24MM'), '0000') > v_dst_start AND to_number(to_char(v_now, 'HH24MM'), '0000') < v_dst_end THEN
v_step_id := jobmon.add_step( v_job_id, 'DST Check');
PERFORM jobmon.update_step(v_step_id, 'OK', 'Job CANCELLED - Does not run during DST time change');
PERFORM jobmon.close_job(v_job_id);
PERFORM gdb(p_debug, 'Cannot run during DST time change');
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
PERFORM pg_advisory_unlock(hashtext('refresh_updater'), hashtext(v_job_name));
RETURN;
END IF;
END IF;
END IF;
v_step_id := add_step(v_job_id,'Building SQL');
-- determine column list, column type list
IF v_filter IS NULL THEN
SELECT array_to_string(array_agg(attname),','), array_to_string(array_agg(attname||' '||atttypid::regtype::text),',') FROM
pg_attribute WHERE attnum > 0 AND attisdropped is false AND attrelid = p_destination::regclass INTO v_cols, v_cols_n_types;
ELSE
-- ensure all primary key columns are included in any column filters
FOREACH v_field IN ARRAY v_pk_field LOOP
IF v_field = ANY(v_filter) THEN
CONTINUE;
ELSE
RAISE EXCEPTION 'ERROR: filter list did not contain all columns that compose primary key for %',v_job_name;
END IF;
END LOOP;
SELECT array_to_string(array_agg(attname),','), array_to_string(array_agg(attname||' '||atttypid::regtype::text),',') FROM
(SELECT unnest(filter) FROM refresh_config_updater WHERE dest_table = p_destination) x
JOIN pg_attribute ON (unnest=attname::text AND attrelid=p_destination::regclass) INTO v_cols, v_cols_n_types;
END IF;
-- init sql statements
v_last_value_sql := 'SELECT max('||v_control||') FROM '||v_tmp_table;
v_limit = COALESCE(p_limit, v_limit, 10000);
-- Repull old data instead of normal new data pull
IF p_repull THEN
-- Repull ALL data if no start and end values set
IF p_repull_start IS NULL AND p_repull_end IS NULL THEN
-- Actual truncate is done after pull to temp table to minimize lock on dest_table
PERFORM update_step(v_step_id, 'OK','Request to repull ALL data from source. This could take a while...');
v_full_refresh := true;
v_remote_sql := 'SELECT '||v_cols||' FROM '||v_source_table;
ELSE
PERFORM update_step(v_step_id, 'OK','Request to repull data from '||p_repull_start||' to '||p_repull_end);
PERFORM gdb(p_debug,'Request to repull data from '||p_repull_start||' to '||p_repull_end);
v_remote_sql := 'SELECT '||v_cols||' FROM '||v_source_table||' WHERE '||v_control||' > '||quote_literal(p_repull_start)||' AND '||v_control||' < '||quote_literal(p_repull_end);
-- Delete the old local data. Unlike inserter, just do this in the normal delete step below
v_delete_sql := 'DELETE FROM '||v_dest_table||' WHERE '||v_control||' > '||quote_literal(p_repull_start)||' AND '||v_control||' < '||quote_literal(p_repull_end);
-- Set last_value equal to local, real table max instead of temp table (just in case)
v_last_value_sql := 'SELECT max('||v_control||') FROM '||v_dest_table;
END IF;
ELSE
-- does < for upper boundary to keep missing data from happening on rare edge case where a newly inserted row outside the transaction batch
-- has the exact same timestamp as the previous batch's max timestamp
v_remote_sql := 'SELECT '||v_cols||' FROM '||v_source_table||' WHERE '||v_control||' > '||quote_literal(v_last_value)||' AND '||v_control||' < '||quote_literal(v_boundary)||' ORDER BY '||v_control||' ASC LIMIT '|| v_limit;
v_delete_sql := 'DELETE FROM '||v_dest_table||' USING '||v_tmp_table||' t WHERE '||v_dest_table||'.'||v_pk_field[1]||'=t.'||v_pk_field[1];
PERFORM update_step(v_step_id, 'OK','Grabbing rows from '||v_last_value::text||' to '||v_boundary::text);
PERFORM gdb(p_debug,'Grabbing rows from '||v_last_value::text||' to '||v_boundary::text);
END IF;
v_create_sql := 'CREATE TEMP TABLE '||v_tmp_table||' AS SELECT '||v_cols||' FROM dblink(auth('||v_dblink||'),'||quote_literal(v_remote_sql)||') t ('||v_cols_n_types||')';
IF array_length(v_pk_field, 1) > 1 THEN
v_pk_where := '';
WHILE v_pk_counter <= array_length(v_pk_field,1) LOOP
v_pk_where := v_pk_where || ' AND '||v_dest_table||'.'||v_pk_field[v_pk_counter]||' = t.'||v_pk_field[v_pk_counter];
v_pk_counter := v_pk_counter + 1;
END LOOP;
END IF;
IF v_pk_where IS NOT NULL THEN
v_delete_sql := v_delete_sql || v_pk_where;
END IF;
v_insert_sql := 'INSERT INTO '||v_dest_table||'('||v_cols||') SELECT '||v_cols||' FROM '||v_tmp_table;
-- create temp from remote
v_step_id := add_step(v_job_id,'Creating temp table ('||v_tmp_table||') from remote table');
PERFORM gdb(p_debug,v_create_sql);
EXECUTE v_create_sql;
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
IF v_rowcount < 1 THEN
PERFORM update_step(v_step_id, 'OK','No new rows found');
EXECUTE 'DROP TABLE IF EXISTS ' || v_tmp_table;
PERFORM close_job(v_job_id);
PERFORM gdb(p_debug, 'No new rows found');
-- Ensure old search path is reset for the current session
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
PERFORM pg_advisory_unlock(hashtext('refresh_updater'), hashtext(v_job_name));
RETURN;
-- Not recommended that the batch actually equal the limit set if possible.
ELSIF v_rowcount = v_limit THEN
PERFORM update_step(v_step_id, 'WARNING','Row count fetched equal to limit set: '||v_limit||'. Recommend increasing batch limit if possible.');
PERFORM gdb(p_debug, 'Row count fetched equal to limit set: '||v_limit||'. Recommend increasing batch limit if possible.');
EXECUTE v_last_value_sql INTO v_last_value;
v_step_id := add_step(v_job_id, 'Removing high boundary rows from this batch to avoid missing data');
EXECUTE 'DELETE FROM '||v_tmp_table||' WHERE '||v_control||' = '||quote_literal(v_last_value);
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
PERFORM update_step(v_step_id, 'OK', 'Removed '||v_rowcount||' rows. Batch now contains '||v_limit - v_rowcount||' records');
PERFORM gdb(p_debug, 'Removed '||v_rowcount||' rows from batch. Batch table now contains '||v_limit - v_rowcount||' records');
IF (v_limit - v_rowcount) < 1 THEN
v_step_id := add_step(v_job_id, 'Reached inconsistent state');
PERFORM update_step(v_step_id, 'CRITICAL', 'Batch contained max rows ('||v_limit||') and all contained the same timestamp value. Unable to guarentee rows will ever be replicated consistently. Increase row limit parameter to allow a consistent batch.');
PERFORM gdb(p_debug, 'Batch contained max rows desired ('||v_limit||') and all contained the same timestamp value. Unable to guarentee rows will be replicated consistently. Increase row limit parameter to allow a consistent batch.');
PERFORM fail_job(v_job_id);
EXECUTE 'DROP TABLE IF EXISTS ' || v_tmp_table;
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
PERFORM pg_advisory_unlock(hashtext('refresh_updater'), hashtext(v_job_name));
RETURN;
END IF;
ELSE
PERFORM update_step(v_step_id, 'OK','Batch contains '||v_rowcount||' records');
PERFORM gdb(p_debug, 'Batch contains '||v_rowcount||' records');
END IF;
IF v_full_refresh THEN
EXECUTE 'TRUNCATE '||v_dest_table;
ELSE
-- delete records to be updated. This step not needed during full refresh
v_step_id := add_step(v_job_id,'Deleting records marked for update in local table');
perform gdb(p_debug,v_delete_sql);
execute v_delete_sql;
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
PERFORM update_step(v_step_id, 'OK','Deleted '||v_rowcount||' records');
END IF;
-- insert
v_step_id := add_step(v_job_id,'Inserting new records into local table');
perform gdb(p_debug,v_insert_sql);
execute v_insert_sql;
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
PERFORM update_step(v_step_id, 'OK','Inserted '||v_rowcount||' records');
-- Get new last_value
v_step_id := add_step(v_job_id, 'Getting local max control field value for next lower boundary');
PERFORM gdb(p_debug, v_last_value_sql);
EXECUTE v_last_value_sql INTO v_last_value;
PERFORM update_step(v_step_id, 'OK','Max value is: '||v_last_value);
PERFORM gdb(p_debug, 'Max value is: '||v_last_value);
-- update boundries
v_step_id := add_step(v_job_id,'Updating last_value in config');
UPDATE refresh_config_updater set last_value = v_last_value WHERE dest_table = p_destination;
PERFORM update_step(v_step_id, 'OK','Done');
EXECUTE 'DROP TABLE IF EXISTS '||v_tmp_table;
PERFORM close_job(v_job_id);
-- Ensure old search path is reset for the current session
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
PERFORM pg_advisory_unlock(hashtext('refresh_updater'), hashtext(v_job_name));
EXCEPTION
WHEN QUERY_CANCELED THEN
PERFORM pg_advisory_unlock(hashtext('refresh_inserter'), hashtext(v_job_name));
RAISE EXCEPTION '%', SQLERRM;
WHEN OTHERS THEN
-- Exception block resets path, so have to reset it again
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_jobmon_schema||','||v_dblink_schema||''',''false'')';
IF v_step_id IS NULL THEN
v_step_id := jobmon.add_step(v_job_id, 'EXCEPTION before first step logged');
END IF;
PERFORM update_step(v_step_id, 'BAD', 'ERROR: '||coalesce(SQLERRM,'unknown'));
PERFORM fail_job(v_job_id);
-- Ensure old search path is reset for the current session
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
PERFORM pg_advisory_unlock(hashtext('refresh_updater'), hashtext(v_job_name));
RAISE EXCEPTION '%', SQLERRM;
END
$$;
|