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Commitea90879

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committed
Enable hash partitioning of text arrays
hash_array_extended() needs to pass PG_GET_COLLATION() to the hashfunction of the element type. Otherwise, the hash function of acollation-aware data type such as text will error out, since theintroduction of nondeterministic collation made hash functions requirea collation, too.The consequence of this is that before this change, hash partitioningusing an array over text in the partition key would not work.Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi>Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>Reviewed-by: Michael Paquier <michael@paquier.xyz>Discussion:https://www.postgresql.org/message-id/flat/32c1fdae-95c6-5dc6-058a-a90330a3b621%40enterprisedb.com
1 parent55416b2 commitea90879

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3 files changed

+77
-1
lines changed

3 files changed

+77
-1
lines changed

‎src/backend/utils/adt/arrayfuncs.c

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -4046,7 +4046,7 @@ hash_array_extended(PG_FUNCTION_ARGS)
40464046
typalign=typentry->typalign;
40474047

40484048
InitFunctionCallInfoData(*locfcinfo,&typentry->hash_extended_proc_finfo,2,
4049-
InvalidOid,NULL,NULL);
4049+
PG_GET_COLLATION(),NULL,NULL);
40504050

40514051
/* Loop over source data */
40524052
nitems=ArrayGetNItems(ndims,dims);

‎src/test/regress/expected/collate.icu.utf8.out

Lines changed: 50 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1208,6 +1208,30 @@ SELECT * FROM test6 WHERE b = 'äbc' COLLATE ctest_nondet;
12081208
2 | äbc
12091209
(2 rows)
12101210

1211+
-- same with arrays
1212+
CREATE TABLE test6a (a int, b text[]);
1213+
INSERT INTO test6a VALUES (1, ARRAY[U&'\00E4bc']);
1214+
INSERT INTO test6a VALUES (2, ARRAY[U&'\0061\0308bc']);
1215+
SELECT * FROM test6a;
1216+
a | b
1217+
---+-------
1218+
1 | {äbc}
1219+
2 | {äbc}
1220+
(2 rows)
1221+
1222+
SELECT * FROM test6a WHERE b = ARRAY['äbc'] COLLATE ctest_det;
1223+
a | b
1224+
---+-------
1225+
1 | {äbc}
1226+
(1 row)
1227+
1228+
SELECT * FROM test6a WHERE b = ARRAY['äbc'] COLLATE ctest_nondet;
1229+
a | b
1230+
---+-------
1231+
1 | {äbc}
1232+
2 | {äbc}
1233+
(2 rows)
1234+
12111235
CREATE COLLATION case_sensitive (provider = icu, locale = '');
12121236
CREATE COLLATION case_insensitive (provider = icu, locale = '@colStrength=secondary', deterministic = false);
12131237
SELECT 'abc' <= 'ABC' COLLATE case_sensitive, 'abc' >= 'ABC' COLLATE case_sensitive;
@@ -1835,6 +1859,19 @@ SELECT (SELECT count(*) FROM test22_0) = (SELECT count(*) FROM test22_1);
18351859
t
18361860
(1 row)
18371861

1862+
-- same with arrays
1863+
CREATE TABLE test22a (a int, b text[] COLLATE case_sensitive) PARTITION BY HASH (b);
1864+
CREATE TABLE test22a_0 PARTITION OF test22a FOR VALUES WITH (MODULUS 2, REMAINDER 0);
1865+
CREATE TABLE test22a_1 PARTITION OF test22a FOR VALUES WITH (MODULUS 2, REMAINDER 1);
1866+
INSERT INTO test22a VALUES (1, ARRAY['def']);
1867+
INSERT INTO test22a VALUES (2, ARRAY['DEF']);
1868+
-- they end up in different partitions
1869+
SELECT (SELECT count(*) FROM test22a_0) = (SELECT count(*) FROM test22a_1);
1870+
?column?
1871+
----------
1872+
t
1873+
(1 row)
1874+
18381875
CREATE TABLE test23 (a int, b text COLLATE case_insensitive) PARTITION BY HASH (b);
18391876
CREATE TABLE test23_0 PARTITION OF test23 FOR VALUES WITH (MODULUS 2, REMAINDER 0);
18401877
CREATE TABLE test23_1 PARTITION OF test23 FOR VALUES WITH (MODULUS 2, REMAINDER 1);
@@ -1847,6 +1884,19 @@ SELECT (SELECT count(*) FROM test23_0) <> (SELECT count(*) FROM test23_1);
18471884
t
18481885
(1 row)
18491886

1887+
-- same with arrays
1888+
CREATE TABLE test23a (a int, b text[] COLLATE case_insensitive) PARTITION BY HASH (b);
1889+
CREATE TABLE test23a_0 PARTITION OF test23a FOR VALUES WITH (MODULUS 2, REMAINDER 0);
1890+
CREATE TABLE test23a_1 PARTITION OF test23a FOR VALUES WITH (MODULUS 2, REMAINDER 1);
1891+
INSERT INTO test23a VALUES (1, ARRAY['def']);
1892+
INSERT INTO test23a VALUES (2, ARRAY['DEF']);
1893+
-- they end up in the same partition (but it's platform-dependent which one)
1894+
SELECT (SELECT count(*) FROM test23a_0) <> (SELECT count(*) FROM test23a_1);
1895+
?column?
1896+
----------
1897+
t
1898+
(1 row)
1899+
18501900
CREATE TABLE test30 (a int, b char(3) COLLATE case_insensitive) PARTITION BY LIST (b);
18511901
CREATE TABLE test30_1 PARTITION OF test30 FOR VALUES IN ('abc');
18521902
INSERT INTO test30 VALUES (1, 'abc');

‎src/test/regress/sql/collate.icu.utf8.sql

Lines changed: 26 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -475,6 +475,14 @@ SELECT * FROM test6;
475475
SELECT*FROM test6WHERE b='äbc' COLLATE ctest_det;
476476
SELECT*FROM test6WHERE b='äbc' COLLATE ctest_nondet;
477477

478+
-- same with arrays
479+
CREATETABLEtest6a (aint, btext[]);
480+
INSERT INTO test6aVALUES (1, ARRAY[U&'\00E4bc']);
481+
INSERT INTO test6aVALUES (2, ARRAY[U&'\0061\0308bc']);
482+
SELECT*FROM test6a;
483+
SELECT*FROM test6aWHERE b= ARRAY['äbc'] COLLATE ctest_det;
484+
SELECT*FROM test6aWHERE b= ARRAY['äbc'] COLLATE ctest_nondet;
485+
478486
CREATE COLLATION case_sensitive (provider= icu, locale='');
479487
CREATE COLLATION case_insensitive (provider= icu, locale='@colStrength=secondary', deterministic= false);
480488

@@ -677,6 +685,15 @@ INSERT INTO test22 VALUES (2, 'DEF');
677685
-- they end up in different partitions
678686
SELECT (SELECTcount(*)FROM test22_0)= (SELECTcount(*)FROM test22_1);
679687

688+
-- same with arrays
689+
CREATETABLEtest22a (aint, btext[] COLLATE case_sensitive) PARTITION BY HASH (b);
690+
CREATETABLEtest22a_0 PARTITION OF test22a FORVALUES WITH (MODULUS2, REMAINDER0);
691+
CREATETABLEtest22a_1 PARTITION OF test22a FORVALUES WITH (MODULUS2, REMAINDER1);
692+
INSERT INTO test22aVALUES (1, ARRAY['def']);
693+
INSERT INTO test22aVALUES (2, ARRAY['DEF']);
694+
-- they end up in different partitions
695+
SELECT (SELECTcount(*)FROM test22a_0)= (SELECTcount(*)FROM test22a_1);
696+
680697
CREATETABLEtest23 (aint, btext COLLATE case_insensitive) PARTITION BY HASH (b);
681698
CREATETABLEtest23_0 PARTITION OF test23 FORVALUES WITH (MODULUS2, REMAINDER0);
682699
CREATETABLEtest23_1 PARTITION OF test23 FORVALUES WITH (MODULUS2, REMAINDER1);
@@ -685,6 +702,15 @@ INSERT INTO test23 VALUES (2, 'DEF');
685702
-- they end up in the same partition (but it's platform-dependent which one)
686703
SELECT (SELECTcount(*)FROM test23_0)<> (SELECTcount(*)FROM test23_1);
687704

705+
-- same with arrays
706+
CREATETABLEtest23a (aint, btext[] COLLATE case_insensitive) PARTITION BY HASH (b);
707+
CREATETABLEtest23a_0 PARTITION OF test23a FORVALUES WITH (MODULUS2, REMAINDER0);
708+
CREATETABLEtest23a_1 PARTITION OF test23a FORVALUES WITH (MODULUS2, REMAINDER1);
709+
INSERT INTO test23aVALUES (1, ARRAY['def']);
710+
INSERT INTO test23aVALUES (2, ARRAY['DEF']);
711+
-- they end up in the same partition (but it's platform-dependent which one)
712+
SELECT (SELECTcount(*)FROM test23a_0)<> (SELECTcount(*)FROM test23a_1);
713+
688714
CREATETABLEtest30 (aint, bchar(3) COLLATE case_insensitive) PARTITION BY LIST (b);
689715
CREATETABLEtest30_1 PARTITION OF test30 FORVALUESIN ('abc');
690716
INSERT INTO test30VALUES (1,'abc');

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