/usr/share/postgresql/9.6/extension/mimeo--0.12.0--0.12.1.sql is in postgresql-9.6-mimeo 1.4.4-1.
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 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 | -- Moved the attempt at taking an advisory lock to the earliest point possible in the refresh jobs to avoid edge case of overlapping jobs causing errors instead of exiting gracefully.
-- Simplified exception blocks and made some error messages clearer in refresh functions.
-- Added some simple exception block pgTAP tests.
/*
* Refresh based on DML (Insert, Update, Delete)
*/
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_batch_limit_reached boolean := false;
v_cols_n_types text;
v_cols text;
v_condition text;
v_control text;
v_dblink int;
v_dblink_name text;
v_dblink_schema text;
v_delete_sql text;
v_dest_table text;
v_exec_status text;
v_fetch_sql text;
v_field text;
v_filter text[];
v_insert_sql text;
v_job_id int;
v_jobmon_schema text;
v_job_name text;
v_limit int;
v_link_exists boolean;
v_old_search_path text;
v_pk_counter int;
v_pk_name_csv text;
v_pk_name_type_csv text := '';
v_pk_name text[];
v_pk_type text[];
v_pk_where text := '';
v_remote_f_sql text;
v_remote_q_sql text;
v_rowcount bigint := 0;
v_source_table text;
v_step_id int;
v_tmp_table text;
v_total bigint := 0;
v_trigger_delete text;
v_trigger_update text;
v_truncate_remote_q 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;
v_dblink_name := 'mimeo_dml_refresh_'||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'')';
-- 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_job_id := add_job(v_job_name);
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, 'WARNING','Found concurrent job. Exiting gracefully');
PERFORM fail_job(v_job_id, 2);
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
, pk_name
, pk_type
, filter
, condition
, 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_name
, v_pk_type
, v_filter
, v_condition
, v_limit;
IF NOT FOUND THEN
RAISE EXCEPTION 'No configuration 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);
v_step_id := add_step(v_job_id,'Sanity check primary/unique key values');
IF v_pk_name IS NULL OR v_pk_type IS NULL THEN
RAISE EXCEPTION '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||' '||format_type(atttypid, atttypmod)::text),',')
INTO v_cols, v_cols_n_types
FROM pg_attribute WHERE attrelid = p_destination::regclass AND attnum > 0 AND attisdropped is false;
ELSE
-- ensure all primary key columns are included in any column filters
FOREACH v_field IN ARRAY v_pk_name LOOP
IF v_field = ANY(v_filter) THEN
CONTINUE;
ELSE
RAISE EXCEPTION 'Filter list did not contain all columns that compose primary/unique key for %',v_job_name;
END IF;
END LOOP;
SELECT array_to_string(array_agg(attname),','), array_to_string(array_agg(attname||' '||format_type(atttypid, atttypmod)::text),',')
INTO v_cols, v_cols_n_types
FROM pg_attribute WHERE attrelid = p_destination::regclass AND ARRAY[attname::text] <@ v_filter AND attnum > 0 AND attisdropped is false;
END IF;
IF p_limit IS NOT NULL THEN
v_limit := p_limit;
END IF;
v_pk_name_csv := array_to_string(v_pk_name, ',');
v_pk_counter := 1;
WHILE v_pk_counter <= array_length(v_pk_name,1) LOOP
IF v_pk_counter > 1 THEN
v_pk_name_type_csv := v_pk_name_type_csv || ', ';
v_pk_where := v_pk_where ||' AND ';
END IF;
v_pk_name_type_csv := v_pk_name_type_csv ||v_pk_name[v_pk_counter]||' '||v_pk_type[v_pk_counter];
v_pk_where := v_pk_where || ' a.'||v_pk_name[v_pk_counter]||' = b.'||v_pk_name[v_pk_counter];
v_pk_counter := v_pk_counter + 1;
END LOOP;
PERFORM update_step(v_step_id, 'OK','Done');
PERFORM dblink_connect(v_dblink_name, auth(v_dblink));
-- update remote entries
v_step_id := add_step(v_job_id,'Updating remote trigger table');
v_with_update := 'WITH a AS (SELECT '||v_pk_name_csv||' FROM '|| v_control ||' ORDER BY '||v_pk_name_csv||' LIMIT '|| COALESCE(v_limit::text, 'ALL') ||') UPDATE '||v_control||' b SET processed = true FROM a WHERE '||v_pk_where;
v_trigger_update := 'SELECT dblink_exec('||quote_literal(v_dblink_name)||','|| quote_literal(v_with_update)||')';
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);
IF p_repull THEN
-- Do truncate of remote queue table here before full data pull is actually started to ensure all new changes are recorded
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...');
v_truncate_remote_q := 'SELECT dblink_exec('||quote_literal(v_dblink_name)||','||quote_literal('TRUNCATE TABLE '||v_control)||')';
EXECUTE v_truncate_remote_q;
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');
-- Define cursor query
v_remote_f_sql := 'SELECT '||v_cols||' FROM '||v_source_table;
IF v_condition IS NOT NULL THEN
v_remote_f_sql := v_remote_f_sql || ' ' || v_condition;
END IF;
ELSE
EXECUTE 'CREATE TEMP TABLE '||v_tmp_table||'_queue ('||v_pk_name_type_csv||', PRIMARY KEY ('||v_pk_name_csv||'))';
-- Copy queue locally for use in removing updated/deleted rows
v_remote_q_sql := 'SELECT DISTINCT '||v_pk_name_csv||' FROM '||v_control||' WHERE processed = true';
PERFORM dblink_open(v_dblink_name, 'mimeo_cursor', v_remote_q_sql);
v_step_id := add_step(v_job_id, 'Creating local queue temp table');
v_rowcount := 0;
LOOP
v_fetch_sql := 'INSERT INTO '||v_tmp_table||'_queue ('||v_pk_name_csv||')
SELECT '||v_pk_name_csv||' FROM dblink_fetch('||quote_literal(v_dblink_name)||', ''mimeo_cursor'', 50000) AS ('||v_pk_name_type_csv||')';
EXECUTE v_fetch_sql;
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
EXIT WHEN v_rowcount = 0;
v_total := v_total + coalesce(v_rowcount, 0);
PERFORM gdb(p_debug,'Fetching rows in batches: '||v_total||' done so far.');
PERFORM update_step(v_step_id, 'PENDING', 'Fetching rows in batches: '||v_total||' done so far.');
END LOOP;
PERFORM dblink_close(v_dblink_name, 'mimeo_cursor');
EXECUTE 'CREATE INDEX ON '||v_tmp_table||'_queue ('||v_pk_name_csv||')';
EXECUTE 'ANALYZE '||v_tmp_table||'_queue';
PERFORM update_step(v_step_id, 'OK','Number of rows inserted: '||v_total);
PERFORM gdb(p_debug,'Temp queue table row count '||v_total::text);
v_step_id := add_step(v_job_id,'Deleting records from local table');
v_delete_sql := 'DELETE FROM '||v_dest_table||' a USING '||v_tmp_table||'_queue b WHERE '|| v_pk_where;
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');
-- Define cursor query
v_remote_f_sql := 'SELECT '||v_cols||' FROM '||v_source_table||' JOIN ('||v_remote_q_sql||') x USING ('||v_pk_name_csv||')';
IF v_condition IS NOT NULL THEN
v_remote_f_sql := v_remote_f_sql || ' ' || v_condition;
END IF;
END IF;
-- insert records to local table. Have to do temp table in case destination table is partitioned (returns 0 when inserting to parent)
PERFORM dblink_open(v_dblink_name, 'mimeo_cursor', v_remote_f_sql);
v_step_id := add_step(v_job_id, 'Inserting new records into local table');
EXECUTE 'CREATE TEMP TABLE '||v_tmp_table||'_full ('||v_cols_n_types||')';
v_rowcount := 0;
v_total := 0;
LOOP
v_fetch_sql := 'INSERT INTO '||v_tmp_table||'_full ('||v_cols||')
SELECT '||v_cols||' FROM dblink_fetch('||quote_literal(v_dblink_name)||', ''mimeo_cursor'', 50000) AS ('||v_cols_n_types||')';
EXECUTE v_fetch_sql;
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
v_total := v_total + coalesce(v_rowcount, 0);
EXECUTE 'INSERT INTO '||v_dest_table||' ('||v_cols||') SELECT '||v_cols||' FROM '||v_tmp_table||'_full';
EXECUTE 'TRUNCATE '||v_tmp_table||'_full';
EXIT WHEN v_rowcount = 0;
PERFORM gdb(p_debug,'Fetching rows in batches: '||v_total||' done so far.');
PERFORM update_step(v_step_id, 'PENDING', 'Fetching rows in batches: '||v_total||' done so far.');
END LOOP;
PERFORM dblink_close(v_dblink_name, 'mimeo_cursor');
PERFORM update_step(v_step_id, 'OK','Number of rows inserted: '||v_total);
IF p_repull = false AND v_total > (v_limit * .75) THEN
v_step_id := add_step(v_job_id, 'Row count warning');
PERFORM update_step(v_step_id, 'WARNING','Row count fetched ('||v_total||') greater than 75% of batch limit ('||v_limit||'). Recommend increasing batch limit if possible.');
v_batch_limit_reached := true;
END IF;
-- clean out rows from txn table
v_step_id := add_step(v_job_id,'Cleaning out rows from txn table');
v_trigger_delete := 'SELECT dblink_exec('||quote_literal(v_dblink_name)||','||quote_literal('DELETE FROM '||v_control||' WHERE processed = true')||')';
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_run in config table');
UPDATE refresh_config_dml SET last_run = CURRENT_TIMESTAMP WHERE dest_table = p_destination;
PERFORM update_step(v_step_id, 'OK','Last run was '||CURRENT_TIMESTAMP);
EXECUTE 'DROP TABLE IF EXISTS '||v_tmp_table||'_full';
EXECUTE 'DROP TABLE IF EXISTS '||v_tmp_table||'_queue';
PERFORM dblink_disconnect(v_dblink_name);
IF v_batch_limit_reached = false THEN
PERFORM close_job(v_job_id);
ELSE
-- Set final job status to level 2 (WARNING) to bring notice that the batch limit was reached and may need adjusting.
-- Preventive warning to keep replication from falling behind.
PERFORM fail_job(v_job_id, 2);
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_dml'), hashtext(v_job_name));
EXCEPTION
WHEN QUERY_CANCELED THEN
EXECUTE 'SELECT '||v_dblink_schema||'.dblink_get_connections() @> ARRAY['||quote_literal(v_dblink_name)||']' INTO v_link_exists;
IF v_link_exists THEN
EXECUTE 'SELECT '||v_dblink_schema||'.dblink_disconnect('||quote_literal(v_dblink_name)||')';
END IF;
PERFORM pg_advisory_unlock(hashtext('refresh_dml'), hashtext(v_job_name));
RAISE EXCEPTION '%', SQLERRM;
WHEN OTHERS THEN
IF v_job_id IS NULL THEN
EXECUTE 'SELECT '||v_jobmon_schema||'.add_job(''Refresh DML: '||p_destination||''')' INTO v_job_id;
EXECUTE 'SELECT '||v_jobmon_schema||'.add_step('||v_job_id||', ''EXCEPTION before job logging started'')' INTO v_step_id;
END IF;
IF v_step_id IS NULL THEN
EXECUTE 'SELECT '||v_jobmon_schema||'.add_step('||v_job_id||', ''EXCEPTION before first step logged'')' INTO v_step_id;
END IF;
EXECUTE 'SELECT '||v_dblink_schema||'.dblink_get_connections() @> ARRAY['||quote_literal(v_dblink_name)||']' INTO v_link_exists;
IF v_link_exists THEN
EXECUTE 'SELECT '||v_dblink_schema||'.dblink_disconnect('||quote_literal(v_dblink_name)||')';
END IF;
EXECUTE 'SELECT '||v_jobmon_schema||'.update_step('||v_step_id||', ''CRITICAL'', ''ERROR: '||coalesce(SQLERRM,'unknown')||''')';
EXECUTE 'SELECT '||v_jobmon_schema||'.fail_job('||v_job_id||')';
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_batch_limit_reached int := 0;
v_boundary timestamptz;
v_cols_n_types text;
v_cols text;
v_condition text;
v_control text;
v_create_sql text;
v_dblink int;
v_dblink_name text;
v_dblink_schema 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_fetch_sql 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_fetched timestamptz;
v_last_value timestamptz;
v_limit int;
v_link_exists boolean;
v_now timestamptz := now();
v_old_search_path text;
v_remote_sql text;
v_rowcount bigint := 0;
v_source_table text;
v_step_id int;
v_tmp_table text;
v_total bigint := 0;
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;
v_dblink_name := 'mimeo_inserter_refresh_'||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'')';
-- 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_job_id := add_job(v_job_name);
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, 'WARNING','Found concurrent job. Exiting gracefully');
PERFORM fail_job(v_job_id, 2);
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
RETURN;
END IF;
v_job_id := add_job(v_job_name);
PERFORM gdb(p_debug,'Job ID: '||v_job_id::text);
SELECT source_table
, dest_table
, 'tmp_'||replace(dest_table,'.','_')
, dblink
, control
, last_value
, now() - boundary::interval
, filter
, condition
, 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_condition
, v_dst_active
, v_dst_start
, v_dst_end
, v_limit;
IF NOT FOUND THEN
RAISE EXCEPTION 'No configuration 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 := add_step( v_job_id, 'DST Check');
PERFORM update_step(v_step_id, 'OK', 'Job CANCELLED - Does not run during DST time change');
PERFORM close_job(v_job_id);
PERFORM gdb(p_debug, 'Cannot run during DST time change');
UPDATE refresh_config_inserter SET last_run = CURRENT_TIMESTAMP WHERE dest_table = p_destination;
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||' '||format_type(atttypid, atttypmod)::text),',')
INTO v_cols, v_cols_n_types
FROM pg_attribute WHERE attrelid = p_destination::regclass AND attnum > 0 AND attisdropped is false;
ELSE
SELECT array_to_string(array_agg(attname),','), array_to_string(array_agg(attname||' '||format_type(atttypid, atttypmod)::text),',')
INTO v_cols, v_cols_n_types
FROM pg_attribute WHERE attrelid = p_destination::regclass AND ARRAY[attname::text] <@ v_filter AND attnum > 0 AND attisdropped is false;
END IF;
PERFORM dblink_connect(v_dblink_name, auth(v_dblink));
IF p_limit IS NOT NULL THEN
v_limit := p_limit;
END IF;
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
PERFORM update_step(v_step_id, 'OK','Request to repull ALL data from source. This could take a while...');
EXECUTE 'TRUNCATE '||v_dest_table;
v_remote_sql := 'SELECT '||v_cols||' FROM '||v_source_table;
IF v_condition IS NOT NULL THEN
v_remote_sql := v_remote_sql || ' ' || v_condition;
END IF;
ELSE
PERFORM update_step(v_step_id, 'OK','Request to repull data from '||COALESCE(p_repull_start, '-infinity')||' to '||COALESCE(p_repull_end, 'infinity'));
PERFORM gdb(p_debug,'Request to repull data from '||COALESCE(p_repull_start, '-infinity')||' to '||COALESCE(p_repull_end, 'infinity'));
v_remote_sql := 'SELECT '||v_cols||' FROM '||v_source_table;
IF v_condition IS NOT NULL THEN
v_remote_sql := v_remote_sql || ' ' || v_condition || ' AND ';
ELSE
v_remote_sql := v_remote_sql || ' WHERE ';
END IF;
v_remote_sql := v_remote_sql ||v_control||' > '||quote_literal(COALESCE(p_repull_start, '-infinity'))||' AND '
||v_control||' < '||quote_literal(COALESCE(p_repull_end, 'infinity'));
-- Delete the old local data
v_delete_sql := 'DELETE FROM '||v_dest_table||' WHERE '||v_control||' > '||quote_literal(COALESCE(p_repull_start, '-infinity'))||' AND '
||v_control||' < '||quote_literal(COALESCE(p_repull_end, 'infinity'));
v_step_id := add_step(v_job_id, 'Deleting current, local data');
PERFORM gdb(p_debug,'Deleting current, local data: '||v_delete_sql);
EXECUTE v_delete_sql;
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
PERFORM update_step(v_step_id, 'OK', v_rowcount || 'rows removed');
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;
IF v_condition IS NOT NULL THEN
v_remote_sql := v_remote_sql || ' ' || v_condition || ' AND ';
ELSE
v_remote_sql := v_remote_sql || ' WHERE ';
END IF;
v_remote_sql := v_remote_sql ||v_control||' > '||quote_literal(v_last_value)||' AND '||v_control||' < '||quote_literal(v_boundary)||' ORDER BY '||v_control||' ASC LIMIT '|| COALESCE(v_limit::text, 'ALL');
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;
EXECUTE 'CREATE TEMP TABLE '||v_tmp_table||' ('||v_cols_n_types||')';
PERFORM gdb(p_debug,v_remote_sql);
PERFORM dblink_open(v_dblink_name, 'mimeo_cursor', v_remote_sql);
v_step_id := add_step(v_job_id, 'Inserting new records into local table');
v_rowcount := 0;
v_total := 0;
LOOP
v_fetch_sql := 'INSERT INTO '||v_tmp_table||'('||v_cols||')
SELECT '||v_cols||' FROM dblink_fetch('||quote_literal(v_dblink_name)||', ''mimeo_cursor'', 50000) AS ('||v_cols_n_types||')';
EXECUTE v_fetch_sql;
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
v_total := v_total + coalesce(v_rowcount, 0);
EXECUTE 'SELECT max('||v_control||') FROM '||v_tmp_table INTO v_last_fetched;
IF v_limit IS NULL THEN -- insert into the real table in batches if no limit to avoid excessively large temp tables
EXECUTE 'INSERT INTO '||v_dest_table||' ('||v_cols||') SELECT '||v_cols||' FROM '||v_tmp_table;
EXECUTE 'TRUNCATE '||v_tmp_table;
END IF;
EXIT WHEN v_rowcount = 0;
PERFORM gdb(p_debug,'Fetching rows in batches: '||v_total||' done so far. Last fetched: '||v_last_fetched);
PERFORM update_step(v_step_id, 'PENDING', 'Fetching rows in batches: '||v_total||' done so far. Last fetched: '||v_last_fetched);
END LOOP;
PERFORM dblink_close(v_dblink_name, 'mimeo_cursor');
PERFORM update_step(v_step_id, 'OK','Rows fetched: '||v_total);
IF v_limit IS NULL THEN
-- nothing else to do
ELSE
-- When using batch limits, entire batch must be pulled to temp table before inserting to real table to catch edge cases
v_step_id := add_step(v_job_id,'Checking for batch limit issues');
PERFORM gdb(p_debug, 'Checking for batch limit issues');
-- Not recommended that the batch actually equal the limit set if possible. Handle all edge cases to keep data consistent
IF v_total >= v_limit THEN
PERFORM update_step(v_step_id, 'WARNING','Row count fetched equal to or greater than limit set: '||v_limit||'. Recommend increasing batch limit if possible.');
PERFORM gdb(p_debug, 'Row count fetched equal to or greater than limit set: '||v_limit||'. Recommend increasing batch limit if possible.');
EXECUTE 'SELECT max('||v_control||') FROM '||v_tmp_table 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');
v_batch_limit_reached = 2;
v_total := v_total - v_rowcount;
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||') or greater 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||') or greaer and all contained the same timestamp value. Unable to guarentee rows will be replicated consistently. Increase row limit parameter to allow a consistent batch.');
v_batch_limit_reached = 3;
END IF;
ELSE
PERFORM update_step(v_step_id, 'OK','No issues found');
PERFORM gdb(p_debug, 'No issues found');
END IF;
IF v_batch_limit_reached <> 3 THEN
v_step_id := add_step(v_job_id,'Inserting new records into local table');
EXECUTE 'INSERT INTO '||v_dest_table||' ('||v_cols||') SELECT '||v_cols||' FROM '||v_tmp_table;
PERFORM update_step(v_step_id, 'OK','Inserted '||v_total||' records');
PERFORM gdb(p_debug, 'Inserted '||v_total||' records');
END IF;
END IF; -- end v_limit IF
IF v_batch_limit_reached <> 3 THEN
v_step_id := add_step(v_job_id, 'Setting next lower boundary');
EXECUTE 'SELECT max('||v_control||') FROM '|| v_dest_table INTO v_last_value;
UPDATE refresh_config_inserter set last_value = coalesce(v_last_value, CURRENT_TIMESTAMP), last_run = CURRENT_TIMESTAMP WHERE dest_table = p_destination;
PERFORM update_step(v_step_id, 'OK','Lower boundary value is: '|| coalesce(v_last_value, CURRENT_TIMESTAMP));
PERFORM gdb(p_debug, 'Lower boundary value is: '||coalesce(v_last_value, CURRENT_TIMESTAMP));
END IF;
EXECUTE 'DROP TABLE IF EXISTS ' || v_tmp_table;
PERFORM dblink_disconnect(v_dblink_name);
IF v_batch_limit_reached = 0 THEN
PERFORM close_job(v_job_id);
ELSIF v_batch_limit_reached = 2 THEN
-- Set final job status to level 2 (WARNING) to bring notice that the batch limit was reached and may need adjusting.
-- Preventive warning to keep replication from falling behind.
PERFORM fail_job(v_job_id, 2);
ELSIF v_batch_limit_reached = 3 THEN
-- Really bad. Critical alert!
PERFORM fail_job(v_job_id);
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_inserter'), hashtext(v_job_name));
EXCEPTION
WHEN QUERY_CANCELED THEN
EXECUTE 'SELECT '||v_dblink_schema||'.dblink_get_connections() @> ARRAY['||quote_literal(v_dblink_name)||']' INTO v_link_exists;
IF v_link_exists THEN
EXECUTE 'SELECT '||v_dblink_schema||'.dblink_disconnect('||quote_literal(v_dblink_name)||')';
END IF;
PERFORM pg_advisory_unlock(hashtext('refresh_inserter'), hashtext(v_job_name));
RAISE EXCEPTION '%', SQLERRM;
WHEN OTHERS THEN
IF v_job_id IS NULL THEN
EXECUTE 'SELECT '||v_jobmon_schema||'.add_job(''Refresh Inserter: '||p_destination||''')' INTO v_job_id;
EXECUTE 'SELECT '||v_jobmon_schema||'.add_step('||v_job_id||', ''EXCEPTION before job logging started'')' INTO v_step_id;
END IF;
IF v_step_id IS NULL THEN
EXECUTE 'SELECT '||v_jobmon_schema||'.add_step('||v_job_id||', ''EXCEPTION before first step logged'')' INTO v_step_id;
END IF;
EXECUTE 'SELECT '||v_dblink_schema||'.dblink_get_connections() @> ARRAY['||quote_literal(v_dblink_name)||']' INTO v_link_exists;
IF v_link_exists THEN
EXECUTE 'SELECT '||v_dblink_schema||'.dblink_disconnect('||quote_literal(v_dblink_name)||')';
END IF;
EXECUTE 'SELECT '||v_jobmon_schema||'.update_step('||v_step_id||', ''CRITICAL'', ''ERROR: '||COALESCE(SQLERRM,'unknown')||''')';
EXECUTE 'SELECT '||v_jobmon_schema||'.fail_job('||v_job_id||')';
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_repull boolean DEFAULT false, p_debug boolean DEFAULT false) RETURNS void
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
v_adv_lock boolean;
v_batch_limit_reached boolean := false;
v_cols_n_types text;
v_cols text;
v_condition text;
v_control text;
v_dblink int;
v_dblink_name text;
v_dblink_schema text;
v_delete_d_sql text;
v_delete_f_sql text;
v_dest_table text;
v_exec_status text;
v_fetch_sql 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_limit int;
v_link_exists boolean;
v_old_search_path text;
v_pk_counter int;
v_pk_name text[];
v_pk_name_csv text;
v_pk_name_type_csv 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_rowcount bigint := 0;
v_source_table text;
v_step_id int;
v_tmp_table text;
v_total bigint := 0;
v_trigger_delete text;
v_trigger_update text;
v_truncate_remote_q 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;
v_dblink_name := 'mimeo_logdel_refresh_'||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'')';
-- 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_job_id := add_job(v_job_name);
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, 'WARNING','Found concurrent job. Exiting gracefully');
PERFORM fail_job(v_job_id, 2);
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
, pk_name
, pk_type
, filter
, condition
, 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_name
, v_pk_type
, v_filter
, v_condition
, v_limit;
IF NOT FOUND THEN
RAISE EXCEPTION 'No configuration 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);
v_step_id := add_step(v_job_id,'Sanity check primary/unique key values');
IF v_pk_name IS NULL OR v_pk_type IS NULL THEN
RAISE EXCEPTION '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||' '||format_type(atttypid, atttypmod)::text),',')
INTO v_cols, v_cols_n_types
FROM pg_attribute WHERE attnum > 0 AND attisdropped is false AND attrelid = p_destination::regclass AND attname != 'mimeo_source_deleted';
ELSE
-- ensure all primary key columns are included in any column filters
FOREACH v_field IN ARRAY v_pk_name LOOP
IF v_field = ANY(v_filter) THEN
CONTINUE;
ELSE
RAISE EXCEPTION '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||' '||format_type(atttypid, atttypmod)::text),',')
INTO v_cols, v_cols_n_types
FROM pg_attribute WHERE attrelid = p_destination::regclass AND ARRAY[attname::text] <@ v_filter AND attnum > 0 AND attisdropped is false AND attname != 'mimeo_source_deleted' ;
END IF;
IF p_limit IS NOT NULL THEN
v_limit := p_limit;
END IF;
v_pk_name_csv := array_to_string(v_pk_name,',');
v_pk_counter := 1;
WHILE v_pk_counter <= array_length(v_pk_name,1) LOOP
IF v_pk_counter > 1 THEN
v_pk_name_type_csv := v_pk_name_type_csv || ', ';
v_pk_where := v_pk_where ||' AND ';
END IF;
v_pk_name_type_csv := v_pk_name_type_csv ||v_pk_name[v_pk_counter]||' '||v_pk_type[v_pk_counter];
v_pk_where := v_pk_where || ' a.'||v_pk_name[v_pk_counter]||' = b.'||v_pk_name[v_pk_counter];
v_pk_counter := v_pk_counter + 1;
END LOOP;
PERFORM update_step(v_step_id, 'OK','Done');
PERFORM dblink_connect(v_dblink_name, auth(v_dblink));
-- update remote entries
v_step_id := add_step(v_job_id,'Updating remote trigger table');
v_with_update := 'WITH a AS (SELECT '||v_pk_name_csv||' FROM '|| v_control ||' ORDER BY '||v_pk_name_csv||' LIMIT '|| COALESCE(v_limit::text, 'ALL') ||') UPDATE '||v_control||' b SET processed = true FROM a WHERE '|| v_pk_where;
v_trigger_update := 'SELECT dblink_exec('||quote_literal(v_dblink_name)||','|| quote_literal(v_with_update)||')';
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 recording deleted rows
EXECUTE 'CREATE TEMP TABLE '||v_tmp_table||'_deleted ('||v_cols_n_types||', mimeo_source_deleted timestamptz)';
v_remote_d_sql := 'SELECT '||v_cols||', mimeo_source_deleted FROM '||v_control||' WHERE processed = true and mimeo_source_deleted IS NOT NULL';
PERFORM dblink_open(v_dblink_name, 'mimeo_cursor', v_remote_d_sql);
v_step_id := add_step(v_job_id, 'Creating local queue temp table for deleted rows on source');
v_rowcount := 0;
v_total := 0;
LOOP
v_fetch_sql := 'INSERT INTO '||v_tmp_table||'_deleted ('||v_cols||', mimeo_source_deleted)
SELECT '||v_cols||', mimeo_source_deleted FROM dblink_fetch('||quote_literal(v_dblink_name)||', ''mimeo_cursor'', 50000) AS ('||v_cols_n_types||', mimeo_source_deleted timestamptz)';
EXECUTE v_fetch_sql;
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
EXIT WHEN v_rowcount = 0;
v_total := v_total + coalesce(v_rowcount, 0);
PERFORM gdb(p_debug,'Fetching rows in batches: '||v_total||' done so far.');
PERFORM update_step(v_step_id, 'PENDING', 'Fetching rows in batches: '||v_total||' done so far.');
END LOOP;
PERFORM dblink_close(v_dblink_name, 'mimeo_cursor');
EXECUTE 'CREATE INDEX ON '||v_tmp_table||'_deleted ('||v_pk_name_csv||')';
EXECUTE 'ANALYZE '||v_tmp_table||'_deleted';
PERFORM update_step(v_step_id, 'OK','Number of rows inserted: '||v_total);
PERFORM gdb(p_debug,'Temp deleted queue table row count '||v_total::text);
IF p_repull THEN
-- Do delete instead of truncate like refresh_dml to avoid missing rows between the above deleted queue fetch and here.
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...');
v_truncate_remote_q := 'SELECT dblink_exec('||quote_literal(v_dblink_name)||','||quote_literal('DELETE FROM '||v_control||' WHERE processed = true')||')';
PERFORM gdb(p_debug, v_truncate_remote_q);
EXECUTE v_truncate_remote_q;
v_step_id := add_step(v_job_id,'Removing local, undeleted rows');
PERFORM gdb(p_debug,'Removing local, undeleted rows');
EXECUTE 'DELETE FROM '||v_dest_table||' WHERE mimeo_source_deleted IS NULL';
PERFORM update_step(v_step_id, 'OK','Done');
-- Define cursor query
v_remote_f_sql := 'SELECT '||v_cols||' FROM '||v_source_table;
IF v_condition IS NOT NULL THEN
v_remote_f_sql := v_remote_f_sql || ' ' || v_condition;
END IF;
ELSE
-- Do normal stuff here
EXECUTE 'CREATE TEMP TABLE '||v_tmp_table||'_queue ('||v_pk_name_type_csv||')';
v_remote_q_sql := 'SELECT DISTINCT '||v_pk_name_csv||' FROM '||v_control||' WHERE processed = true and mimeo_source_deleted IS NULL';
PERFORM dblink_open(v_dblink_name, 'mimeo_cursor', v_remote_q_sql);
v_step_id := add_step(v_job_id, 'Creating local queue temp table for inserts/updates');
v_rowcount := 0;
LOOP
v_fetch_sql := 'INSERT INTO '||v_tmp_table||'_queue ('||v_pk_name_csv||')
SELECT '||v_pk_name_csv||' FROM dblink_fetch('||quote_literal(v_dblink_name)||', ''mimeo_cursor'', 50000) AS ('||v_pk_name_type_csv||')';
EXECUTE v_fetch_sql;
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
EXIT WHEN v_rowcount = 0;
v_total := v_total + coalesce(v_rowcount, 0);
PERFORM gdb(p_debug,'Fetching rows in batches: '||v_total||' done so far.');
PERFORM update_step(v_step_id, 'PENDING', 'Fetching rows in batches: '||v_total||' done so far.');
END LOOP;
PERFORM dblink_close(v_dblink_name, 'mimeo_cursor');
EXECUTE 'CREATE INDEX ON '||v_tmp_table||'_queue ('||v_pk_name_csv||')';
EXECUTE 'ANALYZE '||v_tmp_table||'_queue';
PERFORM update_step(v_step_id, 'OK','Number of rows inserted: '||v_total);
PERFORM gdb(p_debug,'Temp inserts/updates queue table row count '||v_total::text);
-- remove records from local table (inserts/updates)
v_step_id := add_step(v_job_id,'Removing insert/update records from local table');
v_delete_f_sql := 'DELETE FROM '||v_dest_table||' a USING '||v_tmp_table||'_queue b WHERE '|| v_pk_where;
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,'Removing deleted records from local table');
v_delete_d_sql := 'DELETE FROM '||v_dest_table||' a USING '||v_tmp_table||'_deleted b WHERE '|| v_pk_where;
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');
-- Remote full query for normal replication
v_remote_f_sql := 'SELECT '||v_cols||' FROM '||v_source_table||' JOIN ('||v_remote_q_sql||') x USING ('||v_pk_name_csv||')';
IF v_condition IS NOT NULL THEN
v_remote_f_sql := v_remote_f_sql || ' ' || v_condition;
END IF;
END IF;
-- insert records to local table (inserts/updates). Have to do temp table in case destination table is partitioned (returns 0 when inserting to parent)
PERFORM dblink_open(v_dblink_name, 'mimeo_cursor', v_remote_f_sql);
v_step_id := add_step(v_job_id, 'Inserting new/updated records into local table');
EXECUTE 'CREATE TEMP TABLE '||v_tmp_table||'_full ('||v_cols_n_types||')';
v_rowcount := 0;
v_total := 0;
LOOP
v_fetch_sql := 'INSERT INTO '||v_tmp_table||'_full ('||v_cols||')
SELECT '||v_cols||' FROM dblink_fetch('||quote_literal(v_dblink_name)||', ''mimeo_cursor'', 50000) AS ('||v_cols_n_types||')';
EXECUTE v_fetch_sql;
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
v_total := v_total + coalesce(v_rowcount, 0);
EXECUTE 'INSERT INTO '||v_dest_table||' ('||v_cols||') SELECT '||v_cols||' FROM '||v_tmp_table||'_full';
EXECUTE 'TRUNCATE '||v_tmp_table||'_full';
EXIT WHEN v_rowcount = 0;
PERFORM gdb(p_debug,'Fetching rows in batches: '||v_total||' done so far.');
PERFORM update_step(v_step_id, 'PENDING', 'Fetching rows in batches: '||v_total||' done so far.');
END LOOP;
PERFORM dblink_close(v_dblink_name, 'mimeo_cursor');
PERFORM update_step(v_step_id, 'OK','New/updated rows inserted: '||v_total);
-- insert records to local table (deleted rows to be kept)
v_step_id := add_step(v_job_id,'Inserting deleted records into local table');
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';
PERFORM gdb(p_debug,v_insert_deleted_sql);
EXECUTE v_insert_deleted_sql;
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
PERFORM gdb(p_debug,'Deleted rows inserted: '||v_rowcount::text);
PERFORM update_step(v_step_id, 'OK','Inserted '||v_rowcount||' records');
IF (v_total + v_rowcount) > (v_limit * .75) THEN
v_step_id := add_step(v_job_id, 'Row count warning');
PERFORM update_step(v_step_id, 'WARNING','Row count fetched ('||v_total||') greater than 75% of batch limit ('||v_limit||'). Recommend increasing batch limit if possible.');
v_batch_limit_reached := true;
END IF;
-- clean out rows from txn table
v_step_id := add_step(v_job_id,'Cleaning out rows from txn table');
v_trigger_delete := 'SELECT dblink_exec('||quote_literal(v_dblink_name)||','||quote_literal('DELETE FROM '||v_control||' WHERE processed = true')||')';
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_run in config table');
UPDATE refresh_config_logdel SET last_run = CURRENT_TIMESTAMP WHERE dest_table = p_destination;
PERFORM update_step(v_step_id, 'OK','Last Value was '||current_timestamp);
PERFORM dblink_disconnect(v_dblink_name);
EXECUTE 'DROP TABLE IF EXISTS '||v_tmp_table||'_full';
EXECUTE 'DROP TABLE IF EXISTS '||v_tmp_table||'_queue';
EXECUTE 'DROP TABLE IF EXISTS '||v_tmp_table||'_deleted';
IF v_batch_limit_reached = false THEN
PERFORM close_job(v_job_id);
ELSE
-- Set final job status to level 2 (WARNING) to bring notice that the batch limit was reached and may need adjusting.
-- Preventive warning to keep replication from falling behind.
PERFORM fail_job(v_job_id, 2);
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_logdel'), hashtext(v_job_name));
EXCEPTION
WHEN QUERY_CANCELED THEN
EXECUTE 'SELECT '||v_dblink_schema||'.dblink_get_connections() @> ARRAY['||quote_literal(v_dblink_name)||']' INTO v_link_exists;
IF v_link_exists THEN
EXECUTE 'SELECT '||v_dblink_schema||'.dblink_disconnect('||quote_literal(v_dblink_name)||')';
END IF;
PERFORM pg_advisory_unlock(hashtext('refresh_logdel'), hashtext(v_job_name));
RAISE EXCEPTION '%', SQLERRM;
WHEN OTHERS THEN
IF v_job_id IS NULL THEN
EXECUTE 'SELECT '||v_jobmon_schema||'.add_job(''Refresh Log Del: '||p_destination||''')' INTO v_job_id;
EXECUTE 'SELECT '||v_jobmon_schema||'.add_step('||v_job_id||', ''EXCEPTION before job logging started'')' INTO v_step_id;
END IF;
IF v_step_id IS NULL THEN
EXECUTE 'SELECT '||v_jobmon_schema||'.add_step('||v_job_id||', ''EXCEPTION before first step logged'')' INTO v_step_id;
END IF;
EXECUTE 'SELECT '||v_dblink_schema||'.dblink_get_connections() @> ARRAY['||quote_literal(v_dblink_name)||']' INTO v_link_exists;
IF v_link_exists THEN
EXECUTE 'SELECT '||v_dblink_schema||'.dblink_disconnect('||quote_literal(v_dblink_name)||')';
END IF;
EXECUTE 'SELECT '||v_jobmon_schema||'.update_step('||v_step_id||', ''CRITICAL'', ''ERROR: '||coalesce(SQLERRM,'unknown')||''')';
EXECUTE 'SELECT '||v_jobmon_schema||'.fail_job('||v_job_id||')';
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_index boolean DEFAULT true, p_debug boolean DEFAULT false, p_pulldata boolean DEFAULT true) RETURNS void
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
v_adv_lock boolean;
v_cols_n_types text[];
v_cols text[];
v_condition text;
v_create_sql text;
v_dblink int;
v_dblink_name text;
v_dblink_schema text;
v_dest_table text;
v_exists int;
v_fetch_sql text;
v_filter text[];
v_insert_sql text;
v_job_id int;
v_jobmon_schema text;
v_job_name text;
v_lcols_array text[];
v_link_exists boolean;
v_local_sql text;
v_l text;
v_match boolean = true;
v_old_grant record;
v_old_owner text;
v_old_search_path text;
v_old_snap text;
v_old_snap_table text;
v_parts record;
v_post_script text[];
v_refresh_snap text;
v_remote_index_sql text;
v_remote_sql text;
v_row record;
v_rowcount bigint;
v_r text;
v_snap text;
v_source_table text;
v_step_id int;
v_table_exists boolean;
v_total bigint := 0;
v_tup_del bigint;
v_tup_ins bigint;
v_tup_upd bigint;
v_tup_del_new bigint;
v_tup_ins_new bigint;
v_tup_upd_new bigint;
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;
v_dblink_name := 'mimeo_snap_refresh_'||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'')';
-- 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_job_id := add_job(v_job_name);
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, 'WARNING','Found concurrent job. Exiting gracefully');
PERFORM fail_job(v_job_id, 2);
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
RETURN;
END IF;
v_job_id := add_job(v_job_name);
PERFORM gdb(p_debug,'Job ID: '||v_job_id::text);
v_step_id := add_step(v_job_id,'Grabbing Mapping, Building SQL');
SELECT source_table
, dest_table
, dblink
, filter
, condition
, n_tup_ins
, n_tup_upd
, n_tup_del
, post_script
INTO v_source_table
, v_dest_table
, v_dblink
, v_filter
, v_condition
, v_tup_ins
, v_tup_upd
, v_tup_del
, v_post_script
FROM refresh_config_snap
WHERE dest_table = p_destination;
IF NOT FOUND THEN
RAISE EXCEPTION 'No configuration found for %',v_job_name;
END IF;
-- checking for current view
SELECT definition INTO v_view_definition FROM pg_views where
((schemaname || '.') || viewname)=v_dest_table;
PERFORM dblink_connect(v_dblink_name, @extschema@.auth(v_dblink));
PERFORM update_step(v_step_id, 'OK','Done');
v_step_id := add_step(v_job_id,'Truncate non-active snap table');
v_exists := strpos(v_view_definition, 'snap1');
IF v_exists > 0 THEN
v_snap := 'snap2';
v_old_snap := 'snap1';
ELSE
v_snap := 'snap1';
v_old_snap := 'snap2';
END IF;
v_refresh_snap := v_dest_table||'_'||v_snap;
v_old_snap_table := v_dest_table||'_'||v_old_snap;
PERFORM gdb(p_debug,'v_refresh_snap: '||v_refresh_snap::text);
-- Create snap table if it doesn't exist
PERFORM gdb(p_debug, 'Getting table columns and creating destination table if it doesn''t exist');
SELECT p_table_exists, p_cols, p_cols_n_types FROM manage_dest_table(v_dest_table, v_snap, p_debug) INTO v_table_exists, v_cols, v_cols_n_types;
IF v_table_exists THEN
/* 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||'' ''||format_type(atttypid, atttypmod)::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);
EXECUTE v_local_sql INTO v_lcols_array;
-- Check to see if there's a change in the column structure on the remote
FOREACH v_r IN ARRAY v_cols_n_types LOOP
v_match := false;
FOREACH v_l IN ARRAY v_lcols_array LOOP
IF v_r = v_l THEN
v_match := true;
EXIT;
END IF;
END LOOP;
END LOOP;
IF v_match = false THEN
-- Grab old table & view privileges. They are applied later after the view is recreated/swapped
CREATE TEMP TABLE mimeo_snapshot_grants_tmp (statement text);
FOR v_old_grant IN
SELECT table_schema ||'.'|| table_name AS tablename
, array_agg(privilege_type::text) AS types
, grantee
FROM information_schema.table_privileges
WHERE table_schema ||'.'|| table_name IN (v_refresh_snap, v_dest_table)
GROUP BY grantee, table_schema, table_name
LOOP
INSERT INTO mimeo_snapshot_grants_tmp VALUES (
'GRANT '||array_to_string(v_old_grant.types, ',')||' ON '||v_old_grant.tablename||' TO '||v_old_grant.grantee
);
END LOOP;
SELECT viewowner INTO v_old_owner FROM pg_views WHERE schemaname ||'.'|| viewname = v_dest_table;
EXECUTE 'DROP TABLE ' || v_refresh_snap;
EXECUTE 'DROP VIEW ' || v_dest_table;
PERFORM manage_dest_table(v_dest_table, v_snap, p_debug);
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;
-- Only check the remote data if there have been no column changes and snap table actually exists.
-- Otherwise maker functions won't work if source is empty & view switch won't happen properly.
IF v_table_exists AND v_match THEN
v_remote_sql := 'SELECT n_tup_ins, n_tup_upd, n_tup_del FROM pg_catalog.pg_stat_all_tables WHERE relid::regclass = '||quote_literal(v_source_table)||'::regclass';
v_remote_sql := 'SELECT n_tup_ins, n_tup_upd, n_tup_del FROM dblink('||quote_literal(v_dblink_name)||', ' || quote_literal(v_remote_sql) || ') t (n_tup_ins bigint, n_tup_upd bigint, n_tup_del bigint)';
perform gdb(p_debug,'v_remote_sql: '||v_remote_sql);
EXECUTE v_remote_sql INTO v_tup_ins_new, v_tup_upd_new, v_tup_del_new;
IF v_tup_ins_new = v_tup_ins AND v_tup_upd_new = v_tup_upd AND v_tup_del_new = v_tup_del THEN
PERFORM gdb(p_debug,'Remote table has not had any writes. Skipping data pull');
PERFORM update_step(v_step_id, 'OK', 'Remote table has not had any writes. Skipping data pull');
UPDATE refresh_config_snap SET last_run = CURRENT_TIMESTAMP WHERE dest_table = p_destination;
PERFORM dblink_disconnect(v_dblink_name);
PERFORM close_job(v_job_id);
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
PERFORM pg_advisory_unlock(hashtext('refresh_snap'), hashtext(v_job_name));
RETURN;
END IF;
END IF;
v_remote_sql := 'SELECT '|| array_to_string(v_cols, ',') ||' FROM '||v_source_table;
-- Used by p_pulldata parameter in maker function
IF p_pulldata = false THEN
v_remote_sql := v_remote_sql || ' LIMIT 0';
ELSIF v_condition IS NOT NULL THEN
v_remote_sql := v_remote_sql || ' ' || v_condition;
END IF;
v_step_id := add_step(v_job_id,'Inserting records into local table');
PERFORM dblink_open(v_dblink_name, 'mimeo_cursor', v_remote_sql);
v_rowcount := 0;
LOOP
v_fetch_sql := 'INSERT INTO '|| v_refresh_snap ||' ('|| array_to_string(v_cols, ',') ||')
SELECT '||array_to_string(v_cols, ',')||' FROM dblink_fetch('||quote_literal(v_dblink_name)||', ''mimeo_cursor'', 50000) AS ('||array_to_string(v_cols_n_types, ',')||')';
EXECUTE v_fetch_sql;
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
EXIT WHEN v_rowcount = 0;
v_total := v_total + coalesce(v_rowcount, 0);
PERFORM gdb(p_debug,'Fetching rows in batches: '||v_total||' done so far.');
PERFORM update_step(v_step_id, 'PENDING', 'Fetching rows in batches: '||v_total||' done so far.');
END LOOP;
PERFORM dblink_close(v_dblink_name, 'mimeo_cursor');
PERFORM update_step(v_step_id, 'OK','Inserted '||v_total||' rows');
-- Create indexes if new table was created
IF (v_table_exists = false OR v_match = 'f') AND p_index = true THEN
PERFORM gdb(p_debug, 'Creating indexes');
PERFORM create_index(v_dest_table, v_snap, p_debug);
END IF;
EXECUTE 'ANALYZE ' ||v_refresh_snap;
-- 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');
IF v_match = false THEN
-- Actually apply the original privileges if the table was recreated
FOR v_old_grant IN SELECT statement FROM mimeo_snapshot_grants_tmp
LOOP
EXECUTE v_old_grant.statement;
END LOOP;
DROP TABLE IF EXISTS mimeo_snapshot_grants_tmp;
EXECUTE 'ALTER VIEW '||v_dest_table||' OWNER TO '||v_old_owner;
EXECUTE 'ALTER TABLE '||v_refresh_snap||' OWNER TO '||v_old_owner;
-- Run any special sql to fix anything that was done to destination tables (extra indexes, etc)
IF 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;
END IF;
SELECT
CASE
WHEN count(1) > 0 THEN true
ELSE false
END
INTO v_table_exists FROM pg_tables WHERE schemaname ||'.'|| tablename = v_old_snap_table;
IF v_table_exists THEN
v_step_id := add_step(v_job_id,'Truncating old snap table');
EXECUTE 'TRUNCATE TABLE '||v_old_snap_table;
PERFORM update_step(v_step_id, 'OK','Done');
END IF;
v_step_id := add_step(v_job_id,'Updating last_run & tuple change values');
UPDATE refresh_config_snap SET
last_run = CURRENT_TIMESTAMP
, n_tup_ins = v_tup_ins_new
, n_tup_upd = v_tup_upd_new
, n_tup_del = v_tup_del_new
WHERE dest_table = p_destination;
PERFORM update_step(v_step_id, 'OK','Done');
PERFORM dblink_disconnect(v_dblink_name);
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_snap'), hashtext(v_job_name));
EXCEPTION
WHEN QUERY_CANCELED THEN
EXECUTE 'SELECT '||v_dblink_schema||'.dblink_get_connections() @> ARRAY['||quote_literal(v_dblink_name)||']' INTO v_link_exists;
IF v_link_exists THEN
EXECUTE 'SELECT '||v_dblink_schema||'.dblink_disconnect('||quote_literal(v_dblink_name)||')';
END IF;
PERFORM pg_advisory_unlock(hashtext('refresh_snap'), hashtext(v_job_name));
RAISE EXCEPTION '%', SQLERRM;
WHEN OTHERS THEN
IF v_job_id IS NULL THEN
EXECUTE 'SELECT '||v_jobmon_schema||'.add_job(''Refresh Snap: '||p_destination||''')' INTO v_job_id;
EXECUTE 'SELECT '||v_jobmon_schema||'.add_step('||v_job_id||', ''EXCEPTION before job logging started'')' INTO v_step_id;
END IF;
IF v_step_id IS NULL THEN
EXECUTE 'SELECT '||v_jobmon_schema||'.add_step('||v_job_id||', ''EXCEPTION before first step logged'')' INTO v_step_id;
END IF;
EXECUTE 'SELECT '||v_dblink_schema||'.dblink_get_connections() @> ARRAY['||quote_literal(v_dblink_name)||']' INTO v_link_exists;
IF v_link_exists THEN
EXECUTE 'SELECT '||v_dblink_schema||'.dblink_disconnect('||quote_literal(v_dblink_name)||')';
END IF;
EXECUTE 'SELECT '||v_jobmon_schema||'.update_step('||v_step_id||', ''CRITICAL'', ''ERROR: '||COALESCE(SQLERRM,'unknown')||''')';
EXECUTE 'SELECT '||v_jobmon_schema||'.fail_job('||v_job_id||')';
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_batch_limit_reached int := 0;
v_boundary_sql text;
v_boundary timestamptz;
v_cols_n_types text;
v_cols text;
v_condition text;
v_control text;
v_create_sql text;
v_dblink int;
v_dblink_name text;
v_dblink_schema 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_fetch_sql text;
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_fetched timestamptz;
v_last_value timestamptz;
v_limit int;
v_link_exists boolean;
v_now timestamptz := now();
v_old_search_path text;
v_pk_counter int := 1;
v_pk_name text[];
v_remote_boundry_sql text;
v_remote_boundry timestamptz;
v_remote_sql text;
v_rowcount bigint := 0;
v_source_table text;
v_step_id int;
v_tmp_table text;
v_total bigint := 0;
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;
v_dblink_name := 'mimeo_updater_refresh_'||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'')';
-- 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_job_id := add_job(v_job_name);
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, 'WARNING','Found concurrent job. Exiting gracefully');
PERFORM fail_job(v_job_id, 2);
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
RETURN;
END IF;
v_job_id := add_job(v_job_name);
PERFORM gdb(p_debug,'Job ID: '||v_job_id::text);
SELECT source_table
, dest_table
, 'tmp_'||replace(dest_table,'.','_')
, dblink
, control
, last_value
, now() - boundary::interval
, pk_name
, filter
, condition
, 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_name
, v_filter
, v_condition
, v_dst_active
, v_dst_start
, v_dst_end
, v_limit;
IF NOT FOUND THEN
RAISE EXCEPTION 'No configuration 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 := add_step( v_job_id, 'DST Check');
PERFORM update_step(v_step_id, 'OK', 'Job CANCELLED - Does not run during DST time change');
UPDATE refresh_config_updater SET last_run = CURRENT_TIMESTAMP WHERE dest_table = p_destination;
PERFORM 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||' '||format_type(atttypid, atttypmod)::text),',')
INTO v_cols, v_cols_n_types
FROM pg_attribute WHERE attrelid = p_destination::regclass AND attnum > 0 AND attisdropped is false;
ELSE
-- ensure all primary key columns are included in any column filters
FOREACH v_field IN ARRAY v_pk_name LOOP
IF v_field = ANY(v_filter) THEN
CONTINUE;
ELSE
RAISE EXCEPTION 'Filter list did not contain all columns that compose primary/unique key for %',v_job_name;
END IF;
END LOOP;
SELECT array_to_string(array_agg(attname),','), array_to_string(array_agg(attname||' '||format_type(atttypid, atttypmod)::text),',')
INTO v_cols, v_cols_n_types
FROM pg_attribute WHERE attrelid = p_destination::regclass AND ARRAY[attname::text] <@ v_filter AND attnum > 0 AND attisdropped is false;
END IF;
PERFORM dblink_connect(v_dblink_name, auth(v_dblink));
IF p_limit IS NOT NULL THEN
v_limit := p_limit;
END IF;
-- 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
PERFORM update_step(v_step_id, 'OK','Request to repull ALL data from source. This could take a while...');
EXECUTE 'TRUNCATE '||v_dest_table;
v_remote_sql := 'SELECT '||v_cols||' FROM '||v_source_table;
IF v_condition IS NOT NULL THEN
v_remote_sql := v_remote_sql || ' ' || v_condition;
END IF;
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;
IF v_condition IS NOT NULL THEN
v_remote_sql := v_remote_sql || ' ' || v_condition || ' AND ';
ELSE
v_remote_sql := v_remote_sql || ' WHERE ';
END IF;
v_remote_sql := v_remote_sql ||v_control||' > '||quote_literal(COALESCE(p_repull_start, '-infinity'))||' AND '
||v_control||' < '||quote_literal(COALESCE(p_repull_end, 'infinity'));
EXECUTE 'DELETE FROM '||v_dest_table||' WHERE '||v_control||' > '||quote_literal(COALESCE(p_repull_start, '-infinity'))||' AND '
||v_control||' < '||quote_literal(COALESCE(p_repull_end, 'infinity'));
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;
IF v_condition IS NOT NULL THEN
v_remote_sql := v_remote_sql || ' ' || v_condition || ' AND ';
ELSE
v_remote_sql := v_remote_sql || ' WHERE ';
END IF;
v_remote_sql := v_remote_sql ||v_control||' > '||quote_literal(v_last_value)||' AND '||v_control||' < '||quote_literal(v_boundary)||' ORDER BY '||v_control||' ASC LIMIT '|| COALESCE(v_limit::text, 'ALL');
v_delete_sql := 'DELETE FROM '||v_dest_table||' USING '||v_tmp_table||' t WHERE ';
WHILE v_pk_counter <= array_length(v_pk_name,1) LOOP
IF v_pk_counter > 1 THEN
v_delete_sql := v_delete_sql ||' AND ';
END IF;
v_delete_sql := v_delete_sql ||v_dest_table||'.'||v_pk_name[v_pk_counter]||' = t.'||v_pk_name[v_pk_counter];
v_pk_counter := v_pk_counter + 1;
END LOOP;
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_insert_sql := 'INSERT INTO '||v_dest_table||' ('||v_cols||') SELECT '||v_cols||' FROM '||v_tmp_table;
PERFORM gdb(p_debug,v_remote_sql);
PERFORM dblink_open(v_dblink_name, 'mimeo_cursor', v_remote_sql);
v_step_id := add_step(v_job_id, 'Inserting new/updated records into local table');
v_rowcount := 0;
EXECUTE 'CREATE TEMP TABLE '||v_tmp_table||' ('||v_cols_n_types||')';
LOOP
v_fetch_sql := 'INSERT INTO '||v_tmp_table||'('||v_cols||')
SELECT '||v_cols||' FROM dblink_fetch('||quote_literal(v_dblink_name)||', ''mimeo_cursor'', 50000) AS ('||v_cols_n_types||')';
EXECUTE v_fetch_sql;
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
v_total := v_total + coalesce(v_rowcount, 0);
EXECUTE 'SELECT max('||v_control||') FROM '||v_tmp_table INTO v_last_fetched;
IF v_limit IS NULL THEN -- insert into the real table in batches if no limit to avoid excessively large temp tables
IF p_repull IS FALSE THEN -- Delete any rows that exist in the current temp table batch. repull delete is done above.
EXECUTE v_delete_sql;
END IF;
EXECUTE v_insert_sql;
EXECUTE 'TRUNCATE '||v_tmp_table;
END IF;
EXIT WHEN v_rowcount = 0;
PERFORM gdb(p_debug,'Fetching rows in batches: '||v_total||' done so far. Last fetched: '||v_last_fetched);
PERFORM update_step(v_step_id, 'PENDING', 'Fetching rows in batches: '||v_total||' done so far. Last fetched: '||v_last_fetched);
END LOOP;
PERFORM dblink_close(v_dblink_name, 'mimeo_cursor');
PERFORM update_step(v_step_id, 'OK','Rows fetched: '||v_total);
IF v_limit IS NULL THEN
-- nothing else to do
ELSE
-- When using batch limits, entire batch must be pulled to temp table before inserting to real table to catch edge cases
v_step_id := add_step(v_job_id,'Checking for batch limit issues');
-- Not recommended that the batch actually equal the limit set if possible.
IF v_total >= v_limit THEN
PERFORM update_step(v_step_id, 'WARNING','Row count fetched equal to or greater than limit set: '||v_limit||'. Recommend increasing batch limit if possible.');
PERFORM gdb(p_debug, 'Row count fetched equal to or greater than limit set: '||v_limit||'. Recommend increasing batch limit if possible.');
EXECUTE 'SELECT max('||v_control||') FROM '||v_tmp_table 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');
v_batch_limit_reached := 2;
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||') or greater 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 ('||v_limit||') or greater and all contained the same timestamp value. Unable to guarentee rows will be replicated consistently. Increase row limit parameter to allow a consistent batch.');
v_batch_limit_reached := 3;
END IF;
ELSE
PERFORM update_step(v_step_id, 'OK','No issues found');
PERFORM gdb(p_debug, 'No issues found');
END IF;
IF v_batch_limit_reached <> 3 THEN
EXECUTE 'CREATE INDEX ON '||v_tmp_table||' ('||array_to_string(v_pk_name, ',')||')'; -- incase of large batch limit
EXECUTE 'ANALYZE '||v_tmp_table;
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');
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');
END IF;
END IF; -- end v_limit IF
IF v_batch_limit_reached <> 3 THEN
v_step_id := add_step(v_job_id, 'Setting next lower boundary');
EXECUTE 'SELECT max('||v_control||') FROM '|| v_dest_table INTO v_last_value;
UPDATE refresh_config_updater set last_value = coalesce(v_last_value, CURRENT_TIMESTAMP), last_run = CURRENT_TIMESTAMP WHERE dest_table = p_destination;
PERFORM update_step(v_step_id, 'OK','Lower boundary value is: '||coalesce(v_last_value, CURRENT_TIMESTAMP));
PERFORM gdb(p_debug, 'Lower boundary value is: '||coalesce(v_last_value, CURRENT_TIMESTAMP));
END IF;
EXECUTE 'DROP TABLE IF EXISTS '||v_tmp_table;
PERFORM dblink_disconnect(v_dblink_name);
IF v_batch_limit_reached = 0 THEN
PERFORM close_job(v_job_id);
ELSIF v_batch_limit_reached = 2 THEN
-- Set final job status to level 2 (WARNING) to bring notice that the batch limit was reached and may need adjusting.
-- Preventive warning to keep replication from falling behind.
PERFORM fail_job(v_job_id, 2);
ELSIF v_batch_limit_reached = 3 THEN
-- Really bad. Critical alert!
PERFORM fail_job(v_job_id);
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_updater'), hashtext(v_job_name));
EXCEPTION
WHEN QUERY_CANCELED THEN
EXECUTE 'SELECT '||v_dblink_schema||'.dblink_get_connections() @> ARRAY['||quote_literal(v_dblink_name)||']' INTO v_link_exists;
IF v_link_exists THEN
EXECUTE 'SELECT '||v_dblink_schema||'.dblink_disconnect('||quote_literal(v_dblink_name)||')';
END IF;
PERFORM pg_advisory_unlock(hashtext('refresh_updater'), 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_job_id IS NULL THEN
EXECUTE 'SELECT '||v_jobmon_schema||'.add_job(''Refresh Updater: '||p_destination||''')' INTO v_job_id;
EXECUTE 'SELECT '||v_jobmon_schema||'.add_step('||v_job_id||', ''EXCEPTION before job logging started'')' INTO v_step_id;
END IF;
IF v_step_id IS NULL THEN
EXECUTE 'SELECT '||v_jobmon_schema||'.add_step('||v_job_id||', ''EXCEPTION before first step logged'')' INTO v_step_id;
END IF;
EXECUTE 'SELECT '||v_dblink_schema||'.dblink_get_connections() @> ARRAY['||quote_literal(v_dblink_name)||']' INTO v_link_exists;
IF v_link_exists THEN
EXECUTE 'SELECT '||v_dblink_schema||'.dblink_disconnect('||quote_literal(v_dblink_name)||')';
END IF;
EXECUTE 'SELECT '||v_jobmon_schema||'.update_step('||v_step_id||', ''CRITICAL'', ''ERROR: '||COALESCE(SQLERRM,'unknown')||''')';
EXECUTE 'SELECT '||v_jobmon_schema||'.fail_job('||v_job_id||')';
PERFORM pg_advisory_unlock(hashtext('refresh_updater'), hashtext(v_job_name));
RAISE EXCEPTION '%', SQLERRM;
END
$$;
/*
* Plain table refresh function.
*/
CREATE OR REPLACE FUNCTION refresh_table(p_destination text, p_truncate_cascade boolean DEFAULT NULL, p_debug boolean DEFAULT false) RETURNS void
LANGUAGE plpgsql
AS $$
DECLARE
v_adv_lock boolean;
v_cols text[];
v_cols_n_types text[];
v_condition text;
v_dblink int;
v_dblink_name text;
v_dblink_schema text;
v_dest_table text;
v_fetch_sql text;
v_filter text;
v_link_exists boolean;
v_old_search_path text;
v_post_script text[];
v_remote_sql text;
v_rowcount bigint := 0;
v_seq text;
v_seq_max bigint;
v_sequences text[];
v_source_table text;
v_total bigint := 0;
v_truncate_cascade boolean;
v_truncate_sql text;
BEGIN
SELECT nspname INTO v_dblink_schema FROM pg_namespace n, pg_extension e WHERE e.extname = 'dblink' AND e.extnamespace = n.oid;
v_dblink_name := 'mimeo_table_refresh_'||p_destination;
SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_dblink_schema||',public'',''false'')';
v_adv_lock := pg_try_advisory_lock(hashtext('refresh_table'), hashtext(p_destination));
IF v_adv_lock = 'false' THEN
RAISE NOTICE 'Found concurrent job. Exiting gracefully';
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
RETURN;
END IF;
SELECT source_table
, dest_table
, dblink
, filter
, condition
, sequences
, truncate_cascade
INTO v_source_table
, v_dest_table
, v_dblink
, v_filter
, v_condition
, v_sequences
, v_truncate_cascade
FROM refresh_config_table
WHERE dest_table = p_destination;
IF NOT FOUND THEN
RAISE EXCEPTION 'No configuration found for Refresh Table: %',p_destination;
END IF;
IF p_truncate_cascade IS NOT NULL THEN
v_truncate_cascade := p_truncate_cascade;
END IF;
v_truncate_sql := 'TRUNCATE TABLE '||v_dest_table;
IF v_truncate_cascade THEN
v_truncate_sql := v_truncate_sql || ' CASCADE';
RAISE NOTICE 'WARNING! If this table had foreign keys, you have just truncated all referencing tables as well!';
END IF;
EXECUTE v_truncate_sql;
PERFORM dblink_connect(v_dblink_name, @extschema@.auth(v_dblink));
v_remote_sql := 'SELECT array_agg(attname) as cols, array_agg(attname||'' ''||format_type(atttypid, atttypmod)::text) as cols_n_types FROM pg_attribute WHERE attrelid = '||quote_literal(v_source_table)||'::regclass AND attnum > 0 AND attisdropped is false';
IF v_filter IS NOT NULL THEN
v_remote_sql := v_remote_sql || ' AND ARRAY[attname::text] <@ '||quote_literal(v_filter);
END IF;
v_remote_sql := 'SELECT cols, cols_n_types FROM dblink('||quote_literal(v_dblink_name)||', ' || quote_literal(v_remote_sql) || ') t (cols text[], cols_n_types text[])';
EXECUTE v_remote_sql INTO v_cols, v_cols_n_types;
v_remote_sql := 'SELECT '|| array_to_string(v_cols, ',') ||' FROM '||v_source_table;
IF v_condition IS NOT NULL THEN
v_remote_sql := v_remote_sql || ' ' || v_condition;
END IF;
PERFORM dblink_open(v_dblink_name, 'mimeo_cursor', v_remote_sql);
v_rowcount := 0;
LOOP
v_fetch_sql := 'INSERT INTO '|| v_dest_table ||' ('|| array_to_string(v_cols, ',') ||')
SELECT '||array_to_string(v_cols, ',')||' FROM dblink_fetch('||quote_literal(v_dblink_name)||', ''mimeo_cursor'', 50000) AS ('||array_to_string(v_cols_n_types, ',')||')';
EXECUTE v_fetch_sql;
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
EXIT WHEN v_rowcount = 0;
v_total := v_total + coalesce(v_rowcount, 0);
PERFORM gdb(p_debug,'Fetching rows in batches: '||v_total||' done so far.');
END LOOP;
PERFORM dblink_close(v_dblink_name, 'mimeo_cursor');
PERFORM dblink_disconnect(v_dblink_name);
-- Reset any sequences given in the parameter to their new value.
-- Checks all tables that use the given sequence to ensure it's the max for the entire database.
IF v_sequences IS NOT NULL THEN
FOREACH v_seq IN ARRAY v_sequences LOOP
SELECT sequence_max_value(c.oid) INTO v_seq_max FROM pg_class c JOIN pg_namespace n ON c.relnamespace = n.oid WHERE n.nspname ||'.'|| c.relname = v_seq;
IF v_seq_max IS NOT NULL THEN
PERFORM setval(v_seq, v_seq_max);
END IF;
END LOOP;
END IF;
UPDATE refresh_config_table set last_run = CURRENT_TIMESTAMP WHERE dest_table = v_dest_table;
PERFORM pg_advisory_unlock(hashtext('refresh_table'), hashtext(p_destination));
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
EXCEPTION
WHEN QUERY_CANCELED OR OTHERS THEN
EXECUTE 'SELECT '||v_dblink_schema||'.dblink_get_connections() @> ARRAY['||quote_literal(v_dblink_name)||']' INTO v_link_exists;
IF v_link_exists THEN
EXECUTE 'SELECT '||v_dblink_schema||'.dblink_disconnect('||quote_literal(v_dblink_name)||')';
END IF;
PERFORM pg_advisory_unlock(hashtext('refresh_table'), hashtext(p_destination));
RAISE EXCEPTION '%', SQLERRM;
END
$$;
|