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
|
-- Refactor of time functions in relation to epoch partitioning to improve maintainability of the code. Much thanks to Michael Rasmussen (Trekoid)! (Github Pull Request #143)
-- Some code cleanup for python scripts. Much thanks to Rodolphe Quiédeville (rodo)! (Github Pull Request #148)
/*
* Create the trigger function for the parent table of a time-based partition set
*/
CREATE OR REPLACE FUNCTION create_function_time(p_parent_table text, p_job_id bigint DEFAULT NULL) RETURNS void
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
ex_context text;
ex_detail text;
ex_hint text;
ex_message text;
v_control text;
v_count int;
v_current_partition_name text;
v_current_partition_timestamp timestamptz;
v_datetime_string text;
v_epoch boolean;
v_final_partition_timestamp timestamptz;
v_function_name text;
v_job_id bigint;
v_jobmon boolean;
v_jobmon_schema text;
v_new_search_path text := '@extschema@,pg_temp';
v_old_search_path text;
v_new_length int;
v_next_partition_name text;
v_next_partition_timestamp timestamptz;
v_parent_schema text;
v_parent_tablename text;
v_partition_expression text;
v_partition_interval interval;
v_prev_partition_name text;
v_prev_partition_timestamp timestamptz;
v_step_id bigint;
v_trig_func text;
v_optimize_trigger int;
v_trigger_exception_handling boolean;
v_trigger_return_null boolean;
v_type text;
v_upsert text;
BEGIN
SELECT partition_type
, partition_interval::interval
, epoch
, control
, optimize_trigger
, datetime_string
, jobmon
, trigger_exception_handling
, upsert
, trigger_return_null
INTO v_type
, v_partition_interval
, v_epoch
, v_control
, v_optimize_trigger
, v_datetime_string
, v_jobmon
, v_trigger_exception_handling
, v_upsert
, v_trigger_return_null
FROM @extschema@.part_config
WHERE parent_table = p_parent_table
AND (partition_type = 'time' OR partition_type = 'time-custom');
IF NOT FOUND THEN
RAISE EXCEPTION 'ERROR: no config found for %', p_parent_table;
END IF;
SELECT current_setting('search_path') INTO v_old_search_path;
IF v_jobmon THEN
SELECT nspname INTO v_jobmon_schema FROM pg_catalog.pg_namespace n, pg_catalog.pg_extension e WHERE e.extname = 'pg_jobmon'::name AND e.extnamespace = n.oid;
IF v_jobmon_schema IS NOT NULL THEN
v_new_search_path := '@extschema@,'||v_jobmon_schema||',pg_temp';
END IF;
END IF;
EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_new_search_path, 'false');
IF v_jobmon_schema IS NOT NULL THEN
IF p_job_id IS NULL THEN
v_job_id := add_job(format('PARTMAN CREATE FUNCTION: %s', p_parent_table));
ELSE
v_job_id = p_job_id;
END IF;
v_step_id := add_step(v_job_id, format('Creating partition function for table %s', p_parent_table));
END IF;
SELECT schemaname, tablename INTO v_parent_schema, v_parent_tablename
FROM pg_catalog.pg_tables
WHERE schemaname = split_part(p_parent_table, '.', 1)::name
AND tablename = split_part(p_parent_table, '.', 2)::name;
v_function_name := @extschema@.check_name_length(v_parent_tablename, '_part_trig_func', FALSE);
v_partition_expression := case
when v_epoch = true then format('to_timestamp(NEW.%I)', v_control)
else format('NEW.%I', v_control)
end;
IF v_type = 'time' THEN
v_trig_func := format('CREATE OR REPLACE FUNCTION %I.%I() RETURNS trigger LANGUAGE plpgsql AS $t$
DECLARE
v_count int;
v_partition_name text;
v_partition_timestamp timestamptz;
BEGIN
IF TG_OP = ''INSERT'' THEN
'
, v_parent_schema
, v_function_name);
CASE
WHEN v_partition_interval = '15 mins' THEN
v_trig_func := v_trig_func||format('v_partition_timestamp := date_trunc(''hour'', %s) +
''15min''::interval * floor(date_part(''minute'', %1$s) / 15.0);' , v_partition_expression);
v_current_partition_timestamp := date_trunc('hour', CURRENT_TIMESTAMP) +
'15min'::interval * floor(date_part('minute', CURRENT_TIMESTAMP) / 15.0);
WHEN v_partition_interval = '30 mins' THEN
v_trig_func := v_trig_func||format('v_partition_timestamp := date_trunc(''hour'', %s) +
''30min''::interval * floor(date_part(''minute'', %1$s) / 30.0);' , v_partition_expression);
v_current_partition_timestamp := date_trunc('hour', CURRENT_TIMESTAMP) +
'30min'::interval * floor(date_part('minute', CURRENT_TIMESTAMP) / 30.0);
WHEN v_partition_interval = '1 hour' THEN
v_trig_func := v_trig_func||format('v_partition_timestamp := date_trunc(''hour'', %s);', v_partition_expression);
v_current_partition_timestamp := date_trunc('hour', CURRENT_TIMESTAMP);
WHEN v_partition_interval = '1 day' THEN
v_trig_func := v_trig_func||format('v_partition_timestamp := date_trunc(''day'', %s);', v_partition_expression);
v_current_partition_timestamp := date_trunc('day', CURRENT_TIMESTAMP);
WHEN v_partition_interval = '1 week' THEN
v_trig_func := v_trig_func||format('v_partition_timestamp := date_trunc(''week'', %s);', v_partition_expression);
v_current_partition_timestamp := date_trunc('week', CURRENT_TIMESTAMP);
WHEN v_partition_interval = '1 month' THEN
v_trig_func := v_trig_func||format('v_partition_timestamp := date_trunc(''month'', %s);', v_partition_expression);
v_current_partition_timestamp := date_trunc('month', CURRENT_TIMESTAMP);
WHEN v_partition_interval = '3 months' THEN
v_trig_func := v_trig_func||format('v_partition_timestamp := date_trunc(''quarter'', %s);', v_partition_expression);
v_current_partition_timestamp := date_trunc('quarter', CURRENT_TIMESTAMP);
WHEN v_partition_interval = '1 year' THEN
v_trig_func := v_trig_func||format('v_partition_timestamp := date_trunc(''year'', %s);', v_partition_expression);
v_current_partition_timestamp := date_trunc('year', CURRENT_TIMESTAMP);
END CASE;
v_current_partition_name := @extschema@.check_name_length(v_parent_tablename, to_char(v_current_partition_timestamp, v_datetime_string), TRUE);
v_next_partition_timestamp := v_current_partition_timestamp + v_partition_interval::interval;
v_trig_func := v_trig_func ||format('
IF %s >= %L AND %1$s < %3$L THEN '
, v_partition_expression
, v_current_partition_timestamp
, v_next_partition_timestamp);
SELECT count(*) INTO v_count FROM pg_catalog.pg_tables WHERE schemaname = v_parent_schema::name AND tablename = v_current_partition_name::name;
IF v_count > 0 THEN
v_trig_func := v_trig_func || format('
INSERT INTO %I.%I VALUES (NEW.*) %s; ', v_parent_schema, v_current_partition_name, v_upsert);
ELSE
v_trig_func := v_trig_func || '
-- Child table for current values does not exist in this partition set, so write to parent
RETURN NEW;';
END IF;
FOR i IN 1..v_optimize_trigger LOOP
v_prev_partition_timestamp := v_current_partition_timestamp - (v_partition_interval::interval * i);
v_next_partition_timestamp := v_current_partition_timestamp + (v_partition_interval::interval * i);
v_final_partition_timestamp := v_next_partition_timestamp + (v_partition_interval::interval);
v_prev_partition_name := @extschema@.check_name_length(v_parent_tablename, to_char(v_prev_partition_timestamp, v_datetime_string), TRUE);
v_next_partition_name := @extschema@.check_name_length(v_parent_tablename, to_char(v_next_partition_timestamp, v_datetime_string), TRUE);
-- Check that child table exist before making a rule to insert to them.
-- Handles optimize_trigger being larger than premake (to go back in time further) and edge case of changing optimize_trigger immediately after running create_parent().
SELECT count(*) INTO v_count FROM pg_catalog.pg_tables WHERE schemaname = v_parent_schema::name AND tablename = v_prev_partition_name::name;
IF v_count > 0 THEN
v_trig_func := v_trig_func ||format('
ELSIF %s >= %L AND %1$s < %3$L THEN
INSERT INTO %I.%I VALUES (NEW.*) %s;'
, v_partition_expression
, v_prev_partition_timestamp
, v_prev_partition_timestamp + v_partition_interval::interval
, v_parent_schema
, v_prev_partition_name
, v_upsert);
END IF;
SELECT count(*) INTO v_count FROM pg_catalog.pg_tables WHERE schemaname = v_parent_schema::name AND tablename = v_next_partition_name::name;
IF v_count > 0 THEN
v_trig_func := v_trig_func ||format('
ELSIF %s >= %L AND %1$s < %3$L THEN
INSERT INTO %I.%I VALUES (NEW.*) %s;'
, v_partition_expression
, v_next_partition_timestamp
, v_final_partition_timestamp
, v_parent_schema
, v_next_partition_name
, v_upsert);
END IF;
END LOOP;
v_trig_func := v_trig_func||format('
ELSE
v_partition_name := @extschema@.check_name_length(%L, to_char(v_partition_timestamp, %L), TRUE);
SELECT count(*) INTO v_count FROM pg_catalog.pg_tables WHERE schemaname = %L::name AND tablename = v_partition_name::name;
IF v_count > 0 THEN
EXECUTE format(''INSERT INTO %%I.%%I VALUES($1.*) %s'', %L, v_partition_name) USING NEW;
ELSE
RETURN NEW;
END IF;
END IF;'
, v_parent_tablename
, v_datetime_string
, v_parent_schema
, v_upsert
, v_parent_schema);
v_trig_func := v_trig_func ||'
END IF;';
IF v_trigger_return_null IS TRUE THEN
v_trig_func := v_trig_func ||'
RETURN NULL;';
ELSE
v_trig_func := v_trig_func ||'
RETURN NEW;';
END IF;
IF v_trigger_exception_handling THEN
v_trig_func := v_trig_func ||'
EXCEPTION WHEN OTHERS THEN
RAISE WARNING ''pg_partman insert into child table failed, row inserted into parent (%.%). ERROR: %'', TG_TABLE_SCHEMA, TG_TABLE_NAME, COALESCE(SQLERRM, ''unknown'');
RETURN NEW;';
END IF;
v_trig_func := v_trig_func ||'
END $t$;';
EXECUTE v_trig_func;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', format('Added function for current time interval: %s to %s'
, v_current_partition_timestamp
, v_final_partition_timestamp-'1sec'::interval));
END IF;
ELSIF v_type = 'time-custom' THEN
v_trig_func := format('CREATE OR REPLACE FUNCTION %I.%I() RETURNS trigger LANGUAGE plpgsql AS $t$
DECLARE
v_child_schemaname text;
v_child_table text;
v_child_tablename text;
v_upsert text;
BEGIN
'
, v_parent_schema
, v_function_name);
v_trig_func := v_trig_func || format('
SELECT c.child_table, p.upsert INTO v_child_table, v_upsert
FROM @extschema@.custom_time_partitions c
JOIN @extschema@.part_config p ON c.parent_table = p.parent_table
WHERE c.partition_range @> %s
AND c.parent_table = %L;'
, v_partition_expression
, v_parent_schema||'.'||v_parent_tablename);
v_trig_func := v_trig_func || '
SELECT schemaname, tablename INTO v_child_schemaname, v_child_tablename
FROM pg_catalog.pg_tables
WHERE schemaname = split_part(v_child_table, ''.'', 1)::name
AND tablename = split_part(v_child_table, ''.'', 2)::name;
IF v_child_schemaname IS NOT NULL AND v_child_tablename IS NOT NULL THEN
EXECUTE format(''INSERT INTO %I.%I VALUES ($1.*) %s'', v_child_schemaname, v_child_tablename, v_upsert) USING NEW;
ELSE
RETURN NEW;
END IF;';
IF v_trigger_return_null IS TRUE THEN
v_trig_func := v_trig_func ||'
RETURN NULL;';
ELSE
v_trig_func := v_trig_func ||'
RETURN NEW;';
END IF;
IF v_trigger_exception_handling THEN
v_trig_func := v_trig_func ||'
EXCEPTION WHEN OTHERS THEN
RAISE WARNING ''pg_partman insert into child table failed, row inserted into parent (%.%). ERROR: %'', TG_TABLE_SCHEMA, TG_TABLE_NAME, COALESCE(SQLERRM, ''unknown'');
RETURN NEW;';
END IF;
v_trig_func := v_trig_func ||'
END $t$;';
EXECUTE v_trig_func;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', format('Added function for custom time table: %s', p_parent_table));
END IF;
ELSE
RAISE EXCEPTION 'ERROR: Invalid time partitioning type given: %', v_type;
END IF;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM close_job(v_job_id);
END IF;
EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_old_search_path, 'false');
EXCEPTION
WHEN OTHERS THEN
GET STACKED DIAGNOSTICS ex_message = MESSAGE_TEXT,
ex_context = PG_EXCEPTION_CONTEXT,
ex_detail = PG_EXCEPTION_DETAIL,
ex_hint = PG_EXCEPTION_HINT;
IF v_jobmon_schema IS NOT NULL THEN
IF v_job_id IS NULL THEN
EXECUTE format('SELECT %I.add_job(''PARTMAN CREATE FUNCTION: %s'')', v_jobmon_schema, p_parent_table) INTO v_job_id;
EXECUTE format('SELECT %I.add_step(%s, ''Partition function maintenance for table %s failed'')', v_jobmon_schema, v_job_id, p_parent_table) INTO v_step_id;
ELSIF v_step_id IS NULL THEN
EXECUTE format('SELECT %I.add_step(%s, ''EXCEPTION before first step logged'')', v_jobmon_schema, v_job_id) INTO v_step_id;
END IF;
EXECUTE format('SELECT %I.update_step(%s, ''CRITICAL'', %L)', v_jobmon_schema, v_step_id, 'ERROR: '||coalesce(SQLERRM,'unknown'));
EXECUTE format('SELECT %I.fail_job(%s)', v_jobmon_schema, v_job_id);
END IF;
RAISE EXCEPTION '%
CONTEXT: %
DETAIL: %
HINT: %', ex_message, ex_context, ex_detail, ex_hint;
END
$$;
/*
* Function to create a child table in a time-based partition set
*/
CREATE OR REPLACE FUNCTION create_partition_time(p_parent_table text, p_partition_times timestamptz[], p_analyze boolean DEFAULT true, p_debug boolean DEFAULT false)
RETURNS boolean
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
ex_context text;
ex_detail text;
ex_hint text;
ex_message text;
v_all text[] := ARRAY['SELECT', 'INSERT', 'UPDATE', 'DELETE', 'TRUNCATE', 'REFERENCES', 'TRIGGER'];
v_analyze boolean := FALSE;
v_control text;
v_datetime_string text;
v_exists text;
v_epoch boolean;
v_grantees text[];
v_hasoids boolean;
v_inherit_fk boolean;
v_job_id bigint;
v_jobmon boolean;
v_jobmon_schema text;
v_new_search_path text := '@extschema@,pg_temp';
v_old_search_path text;
v_parent_grant record;
v_parent_owner text;
v_parent_schema text;
v_parent_tablename text;
v_partition_created boolean := false;
v_partition_name text;
v_partition_suffix text;
v_parent_tablespace text;
v_partition_expression text;
v_partition_interval interval;
v_partition_timestamp_end timestamptz;
v_partition_timestamp_start timestamptz;
v_quarter text;
v_revoke text;
v_row record;
v_sql text;
v_step_id bigint;
v_step_overflow_id bigint;
v_sub_timestamp_max timestamptz;
v_sub_timestamp_min timestamptz;
v_trunc_value text;
v_time timestamptz;
v_type text;
v_unlogged char;
v_year text;
BEGIN
SELECT partition_type
, control
, partition_interval
, epoch
, inherit_fk
, jobmon
, datetime_string
INTO v_type
, v_control
, v_partition_interval
, v_epoch
, v_inherit_fk
, v_jobmon
, v_datetime_string
FROM @extschema@.part_config
WHERE parent_table = p_parent_table
AND (partition_type = 'time' OR partition_type = 'time-custom');
IF NOT FOUND THEN
RAISE EXCEPTION 'ERROR: no config found for %', p_parent_table;
END IF;
SELECT current_setting('search_path') INTO v_old_search_path;
IF v_jobmon THEN
SELECT nspname INTO v_jobmon_schema FROM pg_catalog.pg_namespace n, pg_catalog.pg_extension e WHERE e.extname = 'pg_jobmon'::name AND e.extnamespace = n.oid;
IF v_jobmon_schema IS NOT NULL THEN
v_new_search_path := '@extschema@,'||v_jobmon_schema||',pg_temp';
END IF;
END IF;
EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_new_search_path, 'false');
-- Determine if this table is a child of a subpartition parent. If so, get limits of what child tables can be created based on parent suffix
SELECT sub_min::timestamptz, sub_max::timestamptz INTO v_sub_timestamp_min, v_sub_timestamp_max FROM @extschema@.check_subpartition_limits(p_parent_table, 'time');
SELECT tableowner, schemaname, tablename, tablespace
INTO v_parent_owner, v_parent_schema, v_parent_tablename, v_parent_tablespace
FROM pg_catalog.pg_tables
WHERE schemaname = split_part(p_parent_table, '.', 1)::name
AND tablename = split_part(p_parent_table, '.', 2)::name;
IF v_jobmon_schema IS NOT NULL THEN
v_job_id := add_job(format('PARTMAN CREATE TABLE: %s', p_parent_table));
END IF;
v_partition_expression := case
when v_epoch = true then format('to_timestamp(%I)', v_control)
else format('%I', v_control)
end;
IF p_debug THEN
RAISE NOTICE 'create_partition_time: v_partition_expression: %', v_partition_expression;
END IF;
FOREACH v_time IN ARRAY p_partition_times LOOP
v_partition_timestamp_start := v_time;
BEGIN
v_partition_timestamp_end := v_time + v_partition_interval;
EXCEPTION WHEN datetime_field_overflow THEN
RAISE WARNING 'Attempted partition time interval is outside PostgreSQL''s supported time range.
Child partition creation after time % skipped', v_time;
v_step_overflow_id := add_step(v_job_id, 'Attempted partition time interval is outside PostgreSQL''s supported time range.');
PERFORM update_step(v_step_overflow_id, 'CRITICAL', 'Child partition creation after time '||v_time||' skipped');
CONTINUE;
END;
-- Do not create the child table if it's outside the bounds of the top parent.
IF v_sub_timestamp_min IS NOT NULL THEN
IF v_time < v_sub_timestamp_min OR v_time > v_sub_timestamp_max THEN
CONTINUE;
END IF;
END IF;
-- This suffix generation code is in partition_data_time() as well
v_partition_suffix := to_char(v_time, v_datetime_string);
v_partition_name := @extschema@.check_name_length(v_parent_tablename, v_partition_suffix, TRUE);
SELECT tablename INTO v_exists FROM pg_catalog.pg_tables WHERE schemaname = v_parent_schema::name AND tablename = v_partition_name::name;
IF v_exists IS NOT NULL THEN
CONTINUE;
END IF;
-- Ensure analyze is run if a new partition is created. Otherwise if one isn't, will be false and analyze will be skipped
v_analyze := TRUE;
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, format('Creating new partition %s.%s with interval from %s to %s'
, v_parent_schema
, v_partition_name
, v_partition_timestamp_start
, v_partition_timestamp_end-'1sec'::interval));
END IF;
SELECT relpersistence INTO v_unlogged
FROM pg_catalog.pg_class c
JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
WHERE c.relname = v_parent_tablename::name
AND n.nspname = v_parent_schema::name;
v_sql := 'CREATE';
IF v_unlogged = 'u' THEN
v_sql := v_sql || ' UNLOGGED';
END IF;
v_sql := v_sql || format(' TABLE %I.%I (LIKE %I.%I INCLUDING DEFAULTS INCLUDING CONSTRAINTS INCLUDING INDEXES INCLUDING STORAGE INCLUDING COMMENTS)'
, v_parent_schema
, v_partition_name
, v_parent_schema
, v_parent_tablename);
SELECT relhasoids INTO v_hasoids
FROM pg_catalog.pg_class c
JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
WHERE c.relname = v_parent_tablename::name
AND n.nspname = v_parent_schema::name;
IF v_hasoids IS TRUE THEN
v_sql := v_sql || ' WITH (OIDS)';
END IF;
EXECUTE v_sql;
IF v_parent_tablespace IS NOT NULL THEN
EXECUTE format('ALTER TABLE %I.%I SET TABLESPACE %I', v_parent_schema, v_partition_name, v_parent_tablespace);
END IF;
EXECUTE format('ALTER TABLE %I.%I ADD CONSTRAINT %I CHECK (%s >= %L AND %4$s < %6$L)'
, v_parent_schema
, v_partition_name
, v_partition_name||'_partition_check'
, v_partition_expression
, v_partition_timestamp_start
, v_partition_timestamp_end);
IF v_epoch = true THEN
EXECUTE format('ALTER TABLE %I.%I ADD CONSTRAINT %I CHECK (%I >= %L AND %I < %L)'
, v_parent_schema
, v_partition_name
, v_partition_name||'_partition_int_check'
, v_control
, EXTRACT('epoch' from v_partition_timestamp_start)
, v_control
, EXTRACT('epoch' from v_partition_timestamp_end) );
END IF;
EXECUTE format('ALTER TABLE %I.%I INHERIT %I.%I'
, v_parent_schema
, v_partition_name
, v_parent_schema
, v_parent_tablename);
-- If custom time, set extra config options.
IF v_type = 'time-custom' THEN
INSERT INTO @extschema@.custom_time_partitions (parent_table, child_table, partition_range)
VALUES ( p_parent_table, v_parent_schema||'.'||v_partition_name, tstzrange(v_partition_timestamp_start, v_partition_timestamp_end, '[)') );
END IF;
PERFORM @extschema@.apply_privileges(v_parent_schema, v_parent_tablename, v_parent_schema, v_partition_name, v_job_id);
PERFORM @extschema@.apply_cluster(v_parent_schema, v_parent_tablename, v_parent_schema, v_partition_name);
IF v_inherit_fk THEN
PERFORM @extschema@.apply_foreign_keys(p_parent_table, v_parent_schema||'.'||v_partition_name, v_job_id);
END IF;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Done');
END IF;
-- Will only loop once and only if sub_partitioning is actually configured
-- This seemed easier than assigning a bunch of variables then doing an IF condition
FOR v_row IN
SELECT sub_parent
, sub_partition_type
, sub_control
, sub_partition_interval
, sub_constraint_cols
, sub_premake
, sub_optimize_trigger
, sub_optimize_constraint
, sub_epoch
, sub_inherit_fk
, sub_retention
, sub_retention_schema
, sub_retention_keep_table
, sub_retention_keep_index
, sub_use_run_maintenance
, sub_infinite_time_partitions
, sub_jobmon
, sub_trigger_exception_handling
FROM @extschema@.part_config_sub
WHERE sub_parent = p_parent_table
LOOP
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, format('Subpartitioning %s.%s', v_parent_schema, v_partition_name));
END IF;
v_sql := format('SELECT @extschema@.create_parent(
p_parent_table := %L
, p_control := %L
, p_type := %L
, p_interval := %L
, p_constraint_cols := %L
, p_premake := %L
, p_use_run_maintenance := %L
, p_inherit_fk := %L
, p_epoch := %L
, p_jobmon := %L )'
, v_parent_schema||'.'||v_partition_name
, v_row.sub_control
, v_row.sub_partition_type
, v_row.sub_partition_interval
, v_row.sub_constraint_cols
, v_row.sub_premake
, v_row.sub_use_run_maintenance
, v_row.sub_inherit_fk
, v_row.sub_epoch
, v_row.sub_jobmon);
EXECUTE v_sql;
UPDATE @extschema@.part_config SET
retention_schema = v_row.sub_retention_schema
, retention_keep_table = v_row.sub_retention_keep_table
, retention_keep_index = v_row.sub_retention_keep_index
, optimize_trigger = v_row.sub_optimize_trigger
, optimize_constraint = v_row.sub_optimize_constraint
, infinite_time_partitions = v_row.sub_infinite_time_partitions
, trigger_exception_handling = v_row.sub_trigger_exception_handling
WHERE parent_table = v_parent_schema||'.'||v_partition_name;
END LOOP; -- end sub partitioning LOOP
-- Manage additonal constraints if set
PERFORM @extschema@.apply_constraints(p_parent_table, p_job_id := v_job_id, p_debug := p_debug);
v_partition_created := true;
END LOOP;
-- v_analyze is a local check if a new table is made.
-- p_analyze is a parameter to say whether to run the analyze at all. Used by create_parent() to avoid long exclusive lock or run_maintenence() to avoid long creation runs.
IF v_analyze AND p_analyze THEN
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, format('Analyzing partition set: %s', p_parent_table));
END IF;
EXECUTE format('ANALYZE %I.%I', v_parent_schema, v_parent_tablename);
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Done');
END IF;
END IF;
IF v_jobmon_schema IS NOT NULL THEN
IF v_partition_created = false THEN
v_step_id := add_step(v_job_id, format('No partitions created for partition set: %s. Attempted intervals: %s', p_parent_table, p_partition_times));
PERFORM update_step(v_step_id, 'OK', 'Done');
END IF;
IF v_step_overflow_id IS NOT NULL THEN
PERFORM fail_job(v_job_id);
ELSE
PERFORM close_job(v_job_id);
END IF;
END IF;
EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_old_search_path, 'false');
RETURN v_partition_created;
EXCEPTION
WHEN OTHERS THEN
GET STACKED DIAGNOSTICS ex_message = MESSAGE_TEXT,
ex_context = PG_EXCEPTION_CONTEXT,
ex_detail = PG_EXCEPTION_DETAIL,
ex_hint = PG_EXCEPTION_HINT;
IF v_jobmon_schema IS NOT NULL THEN
IF v_job_id IS NULL THEN
EXECUTE format('SELECT %I.add_job(''PARTMAN CREATE TABLE: %s'')', v_jobmon_schema, p_parent_table) INTO v_job_id;
EXECUTE format('SELECT %I.add_step(%s, ''EXCEPTION before job logging started'')', v_jobmon_schema, v_job_id, p_parent_table) INTO v_step_id;
ELSIF v_step_id IS NULL THEN
EXECUTE format('SELECT %I.add_step(%s, ''EXCEPTION before first step logged'')', v_jobmon_schema, v_job_id) INTO v_step_id;
END IF;
EXECUTE format('SELECT %I.update_step(%s, ''CRITICAL'', %L)', v_jobmon_schema, v_step_id, 'ERROR: '||coalesce(SQLERRM,'unknown'));
EXECUTE format('SELECT %I.fail_job(%s)', v_jobmon_schema, v_job_id);
END IF;
RAISE EXCEPTION '%
CONTEXT: %
DETAIL: %
HINT: %', ex_message, ex_context, ex_detail, ex_hint;
END
$$;
/*
* Populate the child table(s) of a time-based partition set with old data from the original parent
*/
CREATE OR REPLACE FUNCTION partition_data_time(
p_parent_table text
, p_batch_count int DEFAULT 1
, p_batch_interval interval DEFAULT NULL
, p_lock_wait numeric DEFAULT 0
, p_order text DEFAULT 'ASC'
, p_analyze boolean DEFAULT true)
RETURNS bigint
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
v_control text;
v_datetime_string text;
v_current_partition_name text;
v_epoch boolean;
v_last_partition text;
v_lock_iter int := 1;
v_lock_obtained boolean := FALSE;
v_max_partition_timestamp timestamptz;
v_min_partition_timestamp timestamptz;
v_new_search_path text := '@extschema@,pg_temp';
v_old_search_path text;
v_parent_schema text;
v_parent_tablename text;
v_partition_expression text;
v_partition_interval interval;
v_partition_suffix text;
v_partition_timestamp timestamptz[];
v_quarter text;
v_rowcount bigint;
v_start_control timestamptz;
v_time_position int;
v_total_rows bigint := 0;
v_type text;
v_year text;
BEGIN
SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_new_search_path, 'false');
SELECT partition_type
, partition_interval::interval
, control
, datetime_string
, epoch
INTO v_type
, v_partition_interval
, v_control
, v_datetime_string
, v_epoch
FROM @extschema@.part_config
WHERE parent_table = p_parent_table
AND (partition_type = 'time' OR partition_type = 'time-custom');
IF NOT FOUND THEN
EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_old_search_path, 'false');
RAISE EXCEPTION 'ERROR: no config found for %', p_parent_table;
END IF;
IF p_batch_interval IS NULL OR p_batch_interval > v_partition_interval THEN
p_batch_interval := v_partition_interval;
END IF;
SELECT schemaname, tablename INTO v_parent_schema, v_parent_tablename
FROM pg_catalog.pg_tables
WHERE schemaname = split_part(p_parent_table, '.', 1)::name
AND tablename = split_part(p_parent_table, '.', 2)::name;
SELECT partition_tablename INTO v_last_partition FROM @extschema@.show_partitions(p_parent_table, 'DESC') LIMIT 1;
v_partition_expression := case
when v_epoch = true then format('to_timestamp(%I)', v_control)
else format('%I', v_control)
end;
FOR i IN 1..p_batch_count LOOP
IF p_order = 'ASC' THEN
EXECUTE format('SELECT min(%s) FROM ONLY %I.%I', v_partition_expression, v_parent_schema, v_parent_tablename) INTO v_start_control;
ELSIF p_order = 'DESC' THEN
EXECUTE format('SELECT max(%s) FROM ONLY %I.%I', v_partition_expression, v_parent_schema, v_parent_tablename) INTO v_start_control;
ELSE
RAISE EXCEPTION 'Invalid value for p_order. Must be ASC or DESC';
END IF;
IF v_start_control IS NULL THEN
EXIT;
END IF;
IF v_type = 'time' THEN
CASE
WHEN v_partition_interval = '15 mins' THEN
v_min_partition_timestamp := date_trunc('hour', v_start_control) +
'15min'::interval * floor(date_part('minute', v_start_control) / 15.0);
WHEN v_partition_interval = '30 mins' THEN
v_min_partition_timestamp := date_trunc('hour', v_start_control) +
'30min'::interval * floor(date_part('minute', v_start_control) / 30.0);
WHEN v_partition_interval = '1 hour' THEN
v_min_partition_timestamp := date_trunc('hour', v_start_control);
WHEN v_partition_interval = '1 day' THEN
v_min_partition_timestamp := date_trunc('day', v_start_control);
WHEN v_partition_interval = '1 week' THEN
v_min_partition_timestamp := date_trunc('week', v_start_control);
WHEN v_partition_interval = '1 month' THEN
v_min_partition_timestamp := date_trunc('month', v_start_control);
WHEN v_partition_interval = '3 months' THEN
v_min_partition_timestamp := date_trunc('quarter', v_start_control);
WHEN v_partition_interval = '1 year' THEN
v_min_partition_timestamp := date_trunc('year', v_start_control);
END CASE;
ELSIF v_type = 'time-custom' THEN
SELECT child_start_time INTO v_min_partition_timestamp FROM @extschema@.show_partition_info(v_parent_schema||'.'||v_last_partition
, v_partition_interval::text
, p_parent_table);
v_max_partition_timestamp := v_min_partition_timestamp + v_partition_interval;
LOOP
IF v_start_control >= v_min_partition_timestamp AND v_start_control < v_max_partition_timestamp THEN
EXIT;
ELSE
BEGIN
IF v_start_control > v_max_partition_timestamp THEN
-- Keep going forward in time, checking if child partition time interval encompasses the current v_start_control value
v_min_partition_timestamp := v_max_partition_timestamp;
v_max_partition_timestamp := v_max_partition_timestamp + v_partition_interval;
ELSE
-- Keep going backwards in time, checking if child partition time interval encompasses the current v_start_control value
v_max_partition_timestamp := v_min_partition_timestamp;
v_min_partition_timestamp := v_min_partition_timestamp - v_partition_interval;
END IF;
EXCEPTION WHEN datetime_field_overflow THEN
RAISE EXCEPTION 'Attempted partition time interval is outside PostgreSQL''s supported time range.
Unable to create partition with interval before timestamp % ', v_min_partition_interval;
END;
END IF;
END LOOP;
END IF;
v_partition_timestamp := ARRAY[v_min_partition_timestamp];
IF p_order = 'ASC' THEN
-- Ensure batch interval given as parameter doesn't cause maximum to overflow the current partition maximum
IF (v_start_control + p_batch_interval) >= (v_min_partition_timestamp + v_partition_interval) THEN
v_max_partition_timestamp := v_min_partition_timestamp + v_partition_interval;
ELSE
v_max_partition_timestamp := v_start_control + p_batch_interval;
END IF;
ELSIF p_order = 'DESC' THEN
-- Must be greater than max value still in parent table since query below grabs < max
v_max_partition_timestamp := v_min_partition_timestamp + v_partition_interval;
-- Ensure batch interval given as parameter doesn't cause minimum to underflow current partition minimum
IF (v_start_control - p_batch_interval) >= v_min_partition_timestamp THEN
v_min_partition_timestamp = v_start_control - p_batch_interval;
END IF;
ELSE
RAISE EXCEPTION 'Invalid value for p_order. Must be ASC or DESC';
END IF;
-- do some locking with timeout, if required
IF p_lock_wait > 0 THEN
v_lock_iter := 0;
WHILE v_lock_iter <= 5 LOOP
v_lock_iter := v_lock_iter + 1;
BEGIN
EXECUTE format('SELECT * FROM ONLY %I.%I WHERE %s >= %L AND %3$s < %5$L FOR UPDATE NOWAIT'
, v_parent_schema
, v_parent_tablename
, v_partition_expression
, v_min_partition_timestamp
, v_max_partition_timestamp);
v_lock_obtained := TRUE;
EXCEPTION
WHEN lock_not_available THEN
PERFORM pg_sleep( p_lock_wait / 5.0 );
CONTINUE;
END;
EXIT WHEN v_lock_obtained;
END LOOP;
IF NOT v_lock_obtained THEN
RETURN -1;
END IF;
END IF;
PERFORM @extschema@.create_partition_time(p_parent_table, v_partition_timestamp, p_analyze);
-- This suffix generation code is in create_partition_time() as well
v_partition_suffix := to_char(v_min_partition_timestamp, v_datetime_string);
v_current_partition_name := @extschema@.check_name_length(v_parent_tablename, v_partition_suffix, TRUE);
EXECUTE format('WITH partition_data AS (
DELETE FROM ONLY %I.%I WHERE %s >= %L AND %3$s < %5$L RETURNING *)
INSERT INTO %I.%I SELECT * FROM partition_data'
, v_parent_schema
, v_parent_tablename
, v_partition_expression
, v_min_partition_timestamp
, v_max_partition_timestamp
, v_parent_schema
, v_current_partition_name);
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
v_total_rows := v_total_rows + v_rowcount;
IF v_rowcount = 0 THEN
EXIT;
END IF;
END LOOP;
PERFORM @extschema@.create_function_time(p_parent_table);
EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_old_search_path, 'false');
RETURN v_total_rows;
END
$$;
/*
* Function to manage pre-creation of the next partitions in a set.
* Also manages dropping old partitions if the retention option is set.
* If p_parent_table is passed, will only run run_maintenance() on that one table (no matter what the configuration table may have set for it)
* Otherwise, will run on all tables in the config table with p_run_maintenance() set to true.
* For large partition sets, running analyze can cause maintenance to take longer than expected. Can set p_analyze to false to avoid a forced analyze run.
* Be aware that constraint exclusion may not work properly until an analyze on the partition set is run.
*/
CREATE OR REPLACE FUNCTION run_maintenance(p_parent_table text DEFAULT NULL, p_analyze boolean DEFAULT true, p_jobmon boolean DEFAULT true, p_debug boolean DEFAULT false) RETURNS void
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
ex_context text;
ex_detail text;
ex_hint text;
ex_message text;
v_adv_lock boolean;
v_check_subpart int;
v_create_count int := 0;
v_current_partition text;
v_current_partition_id bigint;
v_current_partition_timestamp timestamptz;
v_drop_count int := 0;
v_job_id bigint;
v_jobmon boolean;
v_jobmon_schema text;
v_last_partition text;
v_last_partition_created boolean;
v_last_partition_id bigint;
v_last_partition_timestamp timestamptz;
v_max_id_parent bigint;
v_max_time_parent timestamptz;
v_new_search_path text := '@extschema@,pg_temp';
v_next_partition_id bigint;
v_next_partition_timestamp timestamptz;
v_old_search_path text;
v_parent_schema text;
v_parent_tablename text;
v_partition_expression text;
v_premade_count int;
v_premake_id_max bigint;
v_premake_id_min bigint;
v_premake_timestamp_min timestamptz;
v_premake_timestamp_max timestamptz;
v_row record;
v_row_max_id record;
v_row_max_time record;
v_row_sub record;
v_step_id bigint;
v_step_overflow_id bigint;
v_sub_id_max bigint;
v_sub_id_max_suffix bigint;
v_sub_id_min bigint;
v_sub_parent text;
v_sub_timestamp_max timestamptz;
v_sub_timestamp_max_suffix timestamptz;
v_sub_timestamp_min timestamptz;
v_tablename text;
v_tables_list_sql text;
BEGIN
v_adv_lock := pg_try_advisory_xact_lock(hashtext('pg_partman run_maintenance'));
IF v_adv_lock = 'false' THEN
RAISE NOTICE 'Partman maintenance already running.';
RETURN;
END IF;
SELECT current_setting('search_path') INTO v_old_search_path;
IF p_jobmon THEN
SELECT nspname INTO v_jobmon_schema FROM pg_catalog.pg_namespace n, pg_catalog.pg_extension e WHERE e.extname = 'pg_jobmon'::name AND e.extnamespace = n.oid;
IF v_jobmon_schema IS NOT NULL THEN
v_new_search_path := '@extschema@,'||v_jobmon_schema||',pg_temp';
END IF;
END IF;
EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_new_search_path, 'false');
IF v_jobmon_schema IS NOT NULL THEN
v_job_id := add_job('PARTMAN RUN MAINTENANCE');
v_step_id := add_step(v_job_id, 'Running maintenance loop');
END IF;
v_row := NULL; -- Ensure it's reset
v_tables_list_sql := 'SELECT parent_table
, partition_type
, partition_interval
, control
, premake
, undo_in_progress
, sub_partition_set_full
, epoch
, infinite_time_partitions
FROM @extschema@.part_config
WHERE sub_partition_set_full = false';
IF p_parent_table IS NULL THEN
v_tables_list_sql := v_tables_list_sql || ' AND use_run_maintenance = true';
ELSE
v_tables_list_sql := v_tables_list_sql || format(' AND parent_table = %L', p_parent_table);
END IF;
FOR v_row IN EXECUTE v_tables_list_sql
LOOP
CONTINUE WHEN v_row.undo_in_progress;
-- Check for consistent data in part_config_sub table. Was unable to get this working properly as either a constraint or trigger.
-- Would either delay raising an error until the next write (which I cannot predict) or disallow future edits to update a sub-partition set's configuration.
-- This way at least provides a consistent way to check that I know will run. If anyone can get a working constraint/trigger, please help!
-- Don't have to worry about this in the serial trigger maintenance since subpartitioning requires run_maintenance().
SELECT sub_parent INTO v_sub_parent FROM @extschema@.part_config_sub WHERE sub_parent = v_row.parent_table;
IF v_sub_parent IS NOT NULL THEN
SELECT count(*) INTO v_check_subpart FROM @extschema@.check_subpart_sameconfig(v_row.parent_table);
IF v_check_subpart > 1 THEN
RAISE EXCEPTION 'Inconsistent data in part_config_sub table. Sub-partition tables that are themselves sub-partitions cannot have differing configuration values among their siblings.
Run this query: "SELECT * FROM @extschema@.check_subpart_sameconfig(''%'');" This should only return a single row or nothing.
If multiple rows are returned, results are all children of the given parent. Update the differing values to be consistent for your desired values.', v_row.sub_parent;
END IF;
END IF;
SELECT schemaname, tablename
INTO v_parent_schema, v_parent_tablename
FROM pg_catalog.pg_tables
WHERE schemaname = split_part(v_row.parent_table, '.', 1)::name
AND tablename = split_part(v_row.parent_table, '.', 2)::name;
v_partition_expression := case
when v_row.epoch = true then format('to_timestamp(%I)', v_row.control)
else format('%I', v_row.control)
end;
IF p_debug THEN
RAISE NOTICE 'run_maint: v_partition_expression: %', v_partition_expression;
END IF;
SELECT partition_tablename INTO v_last_partition FROM @extschema@.show_partitions(v_row.parent_table, 'DESC') LIMIT 1;
IF p_debug THEN
RAISE NOTICE 'run_maint: parent_table: %, v_last_partition: %', v_row.parent_table, v_last_partition;
END IF;
IF v_row.partition_type = 'time' OR v_row.partition_type = 'time-custom' THEN
SELECT child_start_time INTO v_last_partition_timestamp
FROM @extschema@.show_partition_info(v_parent_schema||'.'||v_last_partition, v_row.partition_interval, v_row.parent_table);
-- Loop through child tables starting from highest to get current max value in partition set
-- Avoids doing a scan on entire partition set and/or getting any values accidentally in parent.
FOR v_row_max_time IN
SELECT partition_schemaname, partition_tablename FROM @extschema@.show_partitions(v_row.parent_table, 'DESC')
LOOP
EXECUTE format('SELECT max(%s)::text FROM %I.%I'
, v_partition_expression
, v_row_max_time.partition_schemaname
, v_row_max_time.partition_tablename
) INTO v_current_partition_timestamp;
IF v_current_partition_timestamp IS NOT NULL THEN
SELECT suffix_timestamp INTO v_current_partition_timestamp FROM @extschema@.show_partition_name(v_row.parent_table, v_current_partition_timestamp::text);
EXIT;
END IF;
END LOOP;
-- Check for values in the parent table. If they are there and greater than all child values, use that instead
-- This allows maintenance to continue working properly if there is a large gap in data insertion. Data will remain in parent, but new tables will be created
EXECUTE format('SELECT max(%s) FROM ONLY %I.%I', v_partition_expression, v_parent_schema, v_parent_tablename) INTO v_max_time_parent;
IF p_debug THEN
RAISE NOTICE 'run_maint: v_current_partition_timestamp: %, v_max_time_parent: %', v_current_partition_timestamp, v_max_time_parent;
END IF;
IF v_max_time_parent > v_current_partition_timestamp THEN
SELECT suffix_timestamp INTO v_current_partition_timestamp FROM @extschema@.show_partition_name(v_row.parent_table, v_max_time_parent::text);
END IF;
IF v_current_partition_timestamp IS NULL THEN -- Partition set is completely empty
IF v_row.infinite_time_partitions IS TRUE THEN
-- Set it to now so new partitions continue to be created
v_current_partition_timestamp = CURRENT_TIMESTAMP;
ELSE
-- Nothing to do
CONTINUE;
END IF;
END IF;
-- If this is a subpartition, determine if the last child table has been made. If so, mark it as full so future maintenance runs can skip it
SELECT sub_min::timestamptz, sub_max::timestamptz INTO v_sub_timestamp_min, v_sub_timestamp_max FROM @extschema@.check_subpartition_limits(v_row.parent_table, 'time');
IF v_sub_timestamp_max IS NOT NULL THEN
SELECT suffix_timestamp INTO v_sub_timestamp_max_suffix FROM @extschema@.show_partition_name(v_row.parent_table, v_sub_timestamp_max::text);
IF v_sub_timestamp_max_suffix = v_last_partition_timestamp THEN
-- Final partition for this set is created. Set full and skip it
UPDATE @extschema@.part_config SET sub_partition_set_full = true WHERE parent_table = v_row.parent_table;
CONTINUE;
END IF;
END IF;
-- Check and see how many premade partitions there are.
v_premade_count = round(EXTRACT('epoch' FROM age(v_last_partition_timestamp, v_current_partition_timestamp)) / EXTRACT('epoch' FROM v_row.partition_interval::interval));
v_next_partition_timestamp := v_last_partition_timestamp;
IF p_debug THEN
RAISE NOTICE 'run_maint before loop: current_partition_timestamp: %, v_premade_count: %, v_sub_timestamp_min: %, v_sub_timestamp_max: %'
, v_current_partition_timestamp
, v_premade_count
, v_sub_timestamp_min
, v_sub_timestamp_max;
END IF;
-- Loop premaking until config setting is met. Allows it to catch up if it fell behind or if premake changed
WHILE (v_premade_count < v_row.premake) LOOP
IF p_debug THEN
RAISE NOTICE 'run_maint: parent_table: %, v_premade_count: %, v_next_partition_timestamp: %', v_row.parent_table, v_premade_count, v_next_partition_timestamp;
END IF;
IF v_next_partition_timestamp < v_sub_timestamp_min OR v_next_partition_timestamp > v_sub_timestamp_max THEN
-- With subpartitioning, no need to run if the timestamp is not in the parent table's range
EXIT;
END IF;
BEGIN
v_next_partition_timestamp := v_next_partition_timestamp + v_row.partition_interval::interval;
EXCEPTION WHEN datetime_field_overflow THEN
v_premade_count := v_row.premake; -- do this so it can exit the premake check loop and continue in the outer for loop
IF v_jobmon_schema IS NOT NULL THEN
v_step_overflow_id := add_step(v_job_id, 'Attempted partition time interval is outside PostgreSQL''s supported time range.');
PERFORM update_step(v_step_overflow_id, 'CRITICAL', format('Child partition creation skipped for parent table: %s', v_partition_time));
END IF;
RAISE WARNING 'Attempted partition time interval is outside PostgreSQL''s supported time range. Child partition creation skipped for parent table %', v_row.parent_table;
CONTINUE;
END;
v_last_partition_created := @extschema@.create_partition_time(v_row.parent_table, ARRAY[v_next_partition_timestamp], p_analyze);
IF v_last_partition_created THEN
v_create_count := v_create_count + 1;
PERFORM @extschema@.create_function_time(v_row.parent_table, v_job_id);
END IF;
v_premade_count = round(EXTRACT('epoch' FROM age(v_next_partition_timestamp, v_current_partition_timestamp)) / EXTRACT('epoch' FROM v_row.partition_interval::interval));
END LOOP;
ELSIF v_row.partition_type = 'id' THEN
-- Loop through child tables starting from highest to get current max value in partition set
-- Avoids doing a scan on entire partition set and/or getting any values accidentally in parent.
FOR v_row_max_id IN
SELECT partition_schemaname, partition_tablename FROM @extschema@.show_partitions(v_row.parent_table, 'DESC')
LOOP
EXECUTE format('SELECT max(%I)::text FROM %I.%I'
, v_row.control
, v_row_max_id.partition_schemaname
, v_row_max_id.partition_tablename) INTO v_current_partition_id;
IF v_current_partition_id IS NOT NULL THEN
SELECT suffix_id INTO v_current_partition_id FROM @extschema@.show_partition_name(v_row.parent_table, v_current_partition_id::text);
EXIT;
END IF;
END LOOP;
-- Check for values in the parent table. If they are there and greater than all child values, use that instead
-- This allows maintenance to continue working properly if there is a large gap in data insertion. Data will remain in parent, but new tables will be created
EXECUTE format('SELECT max(%I) FROM ONLY %I.%I', v_row.control, v_parent_schema, v_parent_tablename) INTO v_max_id_parent;
IF v_max_id_parent > v_current_partition_id THEN
SELECT suffix_id INTO v_current_partition_id FROM @extschema@.show_partition_name(v_row.parent_table, v_max_id_parent::text);
END IF;
IF v_current_partition_id IS NULL THEN
-- Partition set is completely empty. Nothing to do
CONTINUE;
END IF;
SELECT child_start_id INTO v_last_partition_id
FROM @extschema@.show_partition_info(v_parent_schema||'.'||v_last_partition, v_row.partition_interval, v_row.parent_table);
-- Determine if this table is a child of a subpartition parent. If so, get limits to see if run_maintenance even needs to run for it.
SELECT sub_min::bigint, sub_max::bigint INTO v_sub_id_min, v_sub_id_max FROM @extschema@.check_subpartition_limits(v_row.parent_table, 'id');
IF v_sub_id_max IS NOT NULL THEN
SELECT suffix_id INTO v_sub_id_max_suffix FROM @extschema@.show_partition_name(v_row.parent_table, v_sub_id_max::text);
IF v_sub_id_max_suffix = v_last_partition_id THEN
-- Final partition for this set is created. Set full and skip it
UPDATE @extschema@.part_config SET sub_partition_set_full = true WHERE parent_table = v_row.parent_table;
CONTINUE;
END IF;
END IF;
v_next_partition_id := v_last_partition_id;
v_premade_count := ((v_last_partition_id - v_current_partition_id) / v_row.partition_interval::bigint);
-- Loop premaking until config setting is met. Allows it to catch up if it fell behind or if premake changed.
WHILE (v_premade_count < v_row.premake) LOOP
IF p_debug THEN
RAISE NOTICE 'run_maint: parent_table: %, v_premade_count: %, v_next_partition_id: %', v_row.parent_table, v_premade_count, v_next_partition_id;
END IF;
IF v_next_partition_id < v_sub_id_min OR v_next_partition_id > v_sub_id_max THEN
-- With subpartitioning, no need to run if the id is not in the parent table's range
EXIT;
END IF;
v_next_partition_id := v_next_partition_id + v_row.partition_interval::bigint;
v_last_partition_created := @extschema@.create_partition_id(v_row.parent_table, ARRAY[v_next_partition_id], p_analyze);
IF v_last_partition_created THEN
v_create_count := v_create_count + 1;
PERFORM @extschema@.create_function_id(v_row.parent_table, v_job_id);
END IF;
v_premade_count := ((v_next_partition_id - v_current_partition_id) / v_row.partition_interval::bigint);
END LOOP;
END IF; -- end main IF check for time or id
END LOOP; -- end of creation loop
-- Manage dropping old partitions if retention option is set
FOR v_row IN
SELECT parent_table FROM @extschema@.part_config WHERE retention IS NOT NULL AND undo_in_progress = false AND
(partition_type = 'time' OR partition_type = 'time-custom')
LOOP
IF p_parent_table IS NULL THEN
v_drop_count := v_drop_count + @extschema@.drop_partition_time(v_row.parent_table);
ELSE -- Only run retention on table given in parameter
IF p_parent_table <> v_row.parent_table THEN
CONTINUE;
ELSE
v_drop_count := v_drop_count + @extschema@.drop_partition_time(v_row.parent_table);
END IF;
END IF;
IF v_drop_count > 0 THEN
PERFORM @extschema@.create_function_time(v_row.parent_table, v_job_id);
END IF;
END LOOP;
FOR v_row IN
SELECT parent_table FROM @extschema@.part_config WHERE retention IS NOT NULL AND undo_in_progress = false AND partition_type = 'id'
LOOP
IF p_parent_table IS NULL THEN
v_drop_count := v_drop_count + @extschema@.drop_partition_id(v_row.parent_table);
ELSE -- Only run retention on table given in parameter
IF p_parent_table <> v_row.parent_table THEN
CONTINUE;
ELSE
v_drop_count := v_drop_count + @extschema@.drop_partition_id(v_row.parent_table);
END IF;
END IF;
IF v_drop_count > 0 THEN
PERFORM @extschema@.create_function_id(v_row.parent_table, v_job_id);
END IF;
END LOOP;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', format('Partition maintenance finished. %s partitons made. %s partitions dropped.', v_create_count, v_drop_count));
IF v_step_overflow_id IS NOT NULL THEN
PERFORM fail_job(v_job_id);
ELSE
PERFORM close_job(v_job_id);
END IF;
END IF;
EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_old_search_path, 'false');
EXCEPTION
WHEN OTHERS THEN
GET STACKED DIAGNOSTICS ex_message = MESSAGE_TEXT,
ex_context = PG_EXCEPTION_CONTEXT,
ex_detail = PG_EXCEPTION_DETAIL,
ex_hint = PG_EXCEPTION_HINT;
IF v_jobmon_schema IS NOT NULL THEN
IF v_job_id IS NULL THEN
EXECUTE format('SELECT %I.add_job(''PARTMAN RUN MAINTENANCE'')', v_jobmon_schema) INTO v_job_id;
EXECUTE format('SELECT %I.add_step(%s, ''EXCEPTION before job logging started'')', v_jobmon_schema, v_job_id, p_parent_table) INTO v_step_id;
ELSIF v_step_id IS NULL THEN
EXECUTE format('SELECT %I.add_step(%s, ''EXCEPTION before first step logged'')', v_jobmon_schema, v_job_id) INTO v_step_id;
END IF;
EXECUTE format('SELECT %I.update_step(%s, ''CRITICAL'', %L)', v_jobmon_schema, v_step_id, 'ERROR: '||coalesce(SQLERRM,'unknown'));
EXECUTE format('SELECT %I.fail_job(%s)', v_jobmon_schema, v_job_id);
END IF;
RAISE EXCEPTION '%
CONTEXT: %
DETAIL: %
HINT: %', ex_message, ex_context, ex_detail, ex_hint;
END
$$;
/*
* Function to undo time-based partitioning created by this extension
*/
CREATE OR REPLACE FUNCTION undo_partition_time(p_parent_table text, p_batch_count int DEFAULT 1, p_batch_interval interval DEFAULT NULL, p_keep_table boolean DEFAULT true, p_lock_wait numeric DEFAULT 0) RETURNS bigint
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
ex_context text;
ex_detail text;
ex_hint text;
ex_message text;
v_adv_lock boolean;
v_batch_loop_count int := 0;
v_child_loop_total bigint := 0;
v_child_min timestamptz;
v_child_table text;
v_control text;
v_epoch boolean;
v_function_name text;
v_inner_loop_count int;
v_lock_iter int := 1;
v_lock_obtained boolean := FALSE;
v_job_id bigint;
v_jobmon boolean;
v_jobmon_schema text;
v_new_search_path text := '@extschema@,pg_temp';
v_old_search_path text;
v_parent_schema text;
v_parent_tablename text;
v_partition_expression text;
v_partition_interval interval;
v_row record;
v_rowcount bigint;
v_step_id bigint;
v_sub_count int;
v_total bigint := 0;
v_trig_name text;
v_type text;
v_undo_count int := 0;
BEGIN
v_adv_lock := pg_try_advisory_xact_lock(hashtext('pg_partman undo_partition_time'));
IF v_adv_lock = 'false' THEN
RAISE NOTICE 'undo_partition_time already running.';
RETURN 0;
END IF;
SELECT partition_type
, partition_interval::interval
, control
, jobmon
, epoch
INTO v_type
, v_partition_interval
, v_control
, v_jobmon
, v_epoch
FROM @extschema@.part_config
WHERE parent_table = p_parent_table
AND (partition_type = 'time' OR partition_type = 'time-custom');
IF v_partition_interval IS NULL THEN
RAISE EXCEPTION 'Configuration for given parent table not found: %', p_parent_table;
END IF;
SELECT current_setting('search_path') INTO v_old_search_path;
IF v_jobmon THEN
SELECT nspname INTO v_jobmon_schema FROM pg_catalog.pg_namespace n, pg_catalog.pg_extension e WHERE e.extname = 'pg_jobmon'::name AND e.extnamespace = n.oid;
IF v_jobmon_schema IS NOT NULL THEN
v_new_search_path := '@extschema@,'||v_jobmon_schema||',pg_temp';
END IF;
END IF;
EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_new_search_path, 'false');
-- Check if any child tables are themselves partitioned or part of an inheritance tree. Prevent undo at this level if so.
-- Need to either lock child tables at all levels or handle the proper removal of triggers on all child tables first
-- before multi-level undo can be performed safely.
FOR v_row IN
SELECT partition_schemaname, partition_tablename FROM @extschema@.show_partitions(p_parent_table)
LOOP
SELECT count(*) INTO v_sub_count
FROM pg_catalog.pg_inherits i
JOIN pg_catalog.pg_class c ON i.inhparent = c.oid
JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
WHERE c.relname = v_row.partition_tablename::name
AND n.nspname = v_row.partition_schemaname::name;
IF v_sub_count > 0 THEN
RAISE EXCEPTION 'Child table for this parent has child table(s) itself (%). Run undo partitioning on this table or remove inheritance first to ensure all data is properly moved to parent', v_row.partition_schemaname||'.'||v_row.partition_tablename;
END IF;
END LOOP;
IF v_jobmon_schema IS NOT NULL THEN
v_job_id := add_job(format('PARTMAN UNDO PARTITIONING: %s', p_parent_table));
v_step_id := add_step(v_job_id, format('Undoing partitioning for table %s', p_parent_table));
END IF;
IF p_batch_interval IS NULL THEN
p_batch_interval := v_partition_interval;
END IF;
SELECT schemaname, tablename
INTO v_parent_schema, v_parent_tablename
FROM pg_catalog.pg_tables
WHERE schemaname = split_part(p_parent_table, '.', 1)::name
AND tablename = split_part(p_parent_table, '.', 2)::name;
v_partition_expression := case
when v_epoch = true then format('to_timestamp(%I)', v_control)
else format('%I', v_control)
end;
-- Stops new time partitons from being made as well as stopping child tables from being dropped if they were configured with a retention period.
UPDATE @extschema@.part_config SET undo_in_progress = true WHERE parent_table = p_parent_table;
-- Stop data going into child tables.
v_trig_name := @extschema@.check_name_length(p_object_name := v_parent_tablename, p_suffix := '_part_trig');
v_function_name := @extschema@.check_name_length(v_parent_tablename, '_part_trig_func', FALSE);
SELECT tgname INTO v_trig_name
FROM pg_catalog.pg_trigger t
JOIN pg_catalog.pg_class c ON t.tgrelid = c.oid
WHERE tgname = v_trig_name::name
AND c.relname = v_parent_tablename::name;
SELECT proname INTO v_function_name FROM pg_catalog.pg_proc p JOIN pg_catalog.pg_namespace n ON p.pronamespace = n.oid WHERE n.nspname = v_parent_schema::name AND proname = v_function_name::name;
IF v_trig_name IS NOT NULL THEN
-- lockwait for trigger drop
IF p_lock_wait > 0 THEN
v_lock_iter := 0;
WHILE v_lock_iter <= 5 LOOP
v_lock_iter := v_lock_iter + 1;
BEGIN
EXECUTE format('LOCK TABLE ONLY %I.%I IN ACCESS EXCLUSIVE MODE NOWAIT', v_parent_schema, v_parent_tablename);
v_lock_obtained := TRUE;
EXCEPTION
WHEN lock_not_available THEN
PERFORM pg_sleep( p_lock_wait / 5.0 );
CONTINUE;
END;
EXIT WHEN v_lock_obtained;
END LOOP;
IF NOT v_lock_obtained THEN
RAISE NOTICE 'Unable to obtain lock on parent table to remove trigger';
RETURN -1;
END IF;
END IF; -- END p_lock_wait IF
EXECUTE format('DROP TRIGGER IF EXISTS %I ON %I.%I', v_trig_name, v_parent_schema, v_parent_tablename);
END IF; -- END trigger IF
v_lock_obtained := FALSE; -- reset for reuse later
IF v_function_name IS NOT NULL THEN
EXECUTE format('DROP FUNCTION IF EXISTS %I.%I()', v_parent_schema, v_function_name);
END IF;
IF v_jobmon_schema IS NOT NULL THEN
IF (v_trig_name IS NOT NULL OR v_function_name IS NOT NULL) THEN
PERFORM update_step(v_step_id, 'OK', 'Stopped partition creation process. Removed trigger & trigger function');
ELSE
PERFORM update_step(v_step_id, 'OK', 'Stopped partition creation process.');
END IF;
END IF;
<<outer_child_loop>>
LOOP
-- Get ordered list of child table in set. Store in variable one at a time per loop until none are left or batch count is reached.
-- This easily allows it to loop over same child table until empty or move onto next child table after it's dropped
SELECT partition_tablename INTO v_child_table FROM @extschema@.show_partitions(p_parent_table, 'ASC') LIMIT 1;
EXIT outer_child_loop WHEN v_child_table IS NULL;
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, format('Removing child partition: %s.%s', v_parent_schema, v_child_table));
END IF;
EXECUTE format('SELECT min(%s) FROM %I.%I', v_partition_expression, v_parent_schema, v_child_table) INTO v_child_min;
IF v_child_min IS NULL THEN
-- No rows left in this child table. Remove from partition set.
-- lockwait timeout for table drop
IF p_lock_wait > 0 THEN
v_lock_iter := 0;
WHILE v_lock_iter <= 5 LOOP
v_lock_iter := v_lock_iter + 1;
BEGIN
EXECUTE format('LOCK TABLE ONLY %I.%I IN ACCESS EXCLUSIVE MODE NOWAIT', v_parent_schema, v_child_table);
v_lock_obtained := TRUE;
EXCEPTION
WHEN lock_not_available THEN
PERFORM pg_sleep( p_lock_wait / 5.0 );
CONTINUE;
END;
EXIT WHEN v_lock_obtained;
END LOOP;
IF NOT v_lock_obtained THEN
RAISE NOTICE 'Unable to obtain lock on child table for removal from partition set';
RETURN -1;
END IF;
END IF; -- END p_lock_wait IF
v_lock_obtained := FALSE; -- reset for reuse later
EXECUTE format('ALTER TABLE %I.%I NO INHERIT %I.%I'
, v_parent_schema
, v_child_table
, v_parent_schema
, v_parent_tablename);
IF p_keep_table = false THEN
EXECUTE format('DROP TABLE %I.%I', v_parent_schema, v_child_table);
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', format('Child table DROPPED. Moved %s rows to parent', v_child_loop_total));
END IF;
ELSE
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', format('Child table UNINHERITED, not DROPPED. Moved %s rows to parent', v_child_loop_total));
END IF;
END IF;
IF v_type = 'time-custom' THEN
DELETE FROM @extschema@.custom_time_partitions WHERE parent_table = p_parent_table AND child_table = v_parent_schema||'.'||v_child_table;
END IF;
v_undo_count := v_undo_count + 1;
EXIT outer_child_loop WHEN v_batch_loop_count >= p_batch_count; -- Exit outer FOR loop if p_batch_count is reached
CONTINUE outer_child_loop; -- skip data moving steps below
END IF;
v_inner_loop_count := 1;
v_child_loop_total := 0;
<<inner_child_loop>>
LOOP
-- do some locking with timeout, if required
IF p_lock_wait > 0 THEN
v_lock_iter := 0;
WHILE v_lock_iter <= 5 LOOP
v_lock_iter := v_lock_iter + 1;
BEGIN
EXECUTE format('SELECT * FROM %I.%I WHERE %I <= %L FOR UPDATE NOWAIT'
, v_parent_schema
, v_child_table
, v_control
, v_child_min + (p_batch_interval * v_inner_loop_count));
v_lock_obtained := TRUE;
EXCEPTION
WHEN lock_not_available THEN
PERFORM pg_sleep( p_lock_wait / 5.0 );
CONTINUE;
END;
EXIT WHEN v_lock_obtained;
END LOOP;
IF NOT v_lock_obtained THEN
RAISE NOTICE 'Unable to obtain lock on batch of rows to move';
RETURN -1;
END IF;
END IF;
-- Get everything from the current child minimum up to the multiples of the given interval
EXECUTE format('WITH move_data AS (
DELETE FROM %I.%I WHERE %s <= %L RETURNING *)
INSERT INTO %I.%I SELECT * FROM move_data'
, v_parent_schema
, v_child_table
, v_partition_expression
, v_child_min + (p_batch_interval * v_inner_loop_count)
, v_parent_schema
, v_parent_tablename);
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
v_total := v_total + v_rowcount;
v_child_loop_total := v_child_loop_total + v_rowcount;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', format('Moved %s rows to parent.', v_child_loop_total));
END IF;
EXIT inner_child_loop WHEN v_rowcount = 0; -- exit before loop incr if table is empty
v_inner_loop_count := v_inner_loop_count + 1;
v_batch_loop_count := v_batch_loop_count + 1;
-- Check again if table is empty and go to outer loop again to drop it if so
EXECUTE format('SELECT min(%s) FROM %I.%I', v_partition_expression, v_parent_schema, v_child_table) INTO v_child_min;
CONTINUE outer_child_loop WHEN v_child_min IS NULL;
EXIT outer_child_loop WHEN v_batch_loop_count >= p_batch_count; -- Exit outer FOR loop if p_batch_count is reached
END LOOP inner_child_loop;
END LOOP outer_child_loop;
SELECT partition_tablename INTO v_child_table FROM @extschema@.show_partitions(p_parent_table, 'ASC') LIMIT 1;
IF v_child_table IS NULL THEN
DELETE FROM @extschema@.part_config WHERE parent_table = p_parent_table;
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Removing config from pg_partman');
PERFORM update_step(v_step_id, 'OK', 'Done');
END IF;
END IF;
RAISE NOTICE 'Copied % row(s) to the parent. Removed % partitions.', v_total, v_undo_count;
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Final stats');
PERFORM update_step(v_step_id, 'OK', format('Copied %s row(s) to the parent. Removed %s partitions.', v_total, v_undo_count));
END IF;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM close_job(v_job_id);
END IF;
EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_old_search_path, 'false');
RETURN v_total;
EXCEPTION
WHEN OTHERS THEN
GET STACKED DIAGNOSTICS ex_message = MESSAGE_TEXT,
ex_context = PG_EXCEPTION_CONTEXT,
ex_detail = PG_EXCEPTION_DETAIL,
ex_hint = PG_EXCEPTION_HINT;
IF v_jobmon_schema IS NOT NULL THEN
IF v_job_id IS NULL THEN
EXECUTE format('SELECT %I.add_job(''PARTMAN UNDO PARTITIONING: %s'')', v_jobmon_schema, p_parent_table) INTO v_job_id;
EXECUTE format('SELECT %I.add_step(%s, ''EXCEPTION before job logging started'')', v_jobmon_schema, v_job_id, p_parent_table) INTO v_step_id;
ELSIF v_step_id IS NULL THEN
EXECUTE format('SELECT %I.add_step(%s, ''EXCEPTION before first step logged'')', v_jobmon_schema, v_job_id) INTO v_step_id;
END IF;
EXECUTE format('SELECT %I.update_step(%s, ''CRITICAL'', %L)', v_jobmon_schema, v_step_id, 'ERROR: '||coalesce(SQLERRM,'unknown'));
EXECUTE format('SELECT %I.fail_job(%s)', v_jobmon_schema, v_job_id);
END IF;
RAISE EXCEPTION '%
CONTEXT: %
DETAIL: %
HINT: %', ex_message, ex_context, ex_detail, ex_hint;
END
$$;
|