diff options
Diffstat (limited to 'src/test/regress/sql')
-rw-r--r-- | src/test/regress/sql/collate.icu.utf8.sql | 13 | ||||
-rw-r--r-- | src/test/regress/sql/eager_aggregate.sql | 377 | ||||
-rw-r--r-- | src/test/regress/sql/opr_sanity.sql | 2 | ||||
-rw-r--r-- | src/test/regress/sql/partition_aggregate.sql | 2 | ||||
-rw-r--r-- | src/test/regress/sql/publication.sql | 46 | ||||
-rw-r--r-- | src/test/regress/sql/window.sql | 13 |
6 files changed, 452 insertions, 1 deletions
diff --git a/src/test/regress/sql/collate.icu.utf8.sql b/src/test/regress/sql/collate.icu.utf8.sql index dbc190227d0..6f5abac0dc0 100644 --- a/src/test/regress/sql/collate.icu.utf8.sql +++ b/src/test/regress/sql/collate.icu.utf8.sql @@ -997,6 +997,19 @@ INSERT INTO t5 (a, b) values (1, 'D1'), (2, 'D2'), (3, 'd1'); -- rewriting.) SELECT * FROM t5 ORDER BY c ASC, a ASC; +-- Check that DEFAULT expressions in SQL/JSON functions use the same collation +-- as the RETURNING type. Mismatched collations should raise an error. +CREATE DOMAIN d1 AS text COLLATE case_insensitive; +CREATE DOMAIN d2 AS text COLLATE "C"; +SELECT JSON_VALUE('{"a": "A"}', '$.a' RETURNING d1 DEFAULT ('C' COLLATE "C") COLLATE case_insensitive ON EMPTY) = 'a'; -- true +SELECT JSON_VALUE('{"a": "A"}', '$.a' RETURNING d1 DEFAULT 'C' ON EMPTY) = 'a'; -- true +SELECT JSON_VALUE('{"a": "A"}', '$.a' RETURNING d1 DEFAULT 'C'::d2 ON EMPTY) = 'a'; -- error +SELECT JSON_VALUE('{"a": "A"}', '$.a' RETURNING d1 DEFAULT 'C' COLLATE "C" ON EMPTY) = 'a'; -- error +SELECT JSON_VALUE('{"a": "A"}', '$.c' RETURNING d1 DEFAULT 'A' ON EMPTY) = 'a'; -- true +SELECT JSON_VALUE('{"a": "A"}', '$.c' RETURNING d1 DEFAULT 'A' COLLATE case_insensitive ON EMPTY) = 'a'; -- true +SELECT JSON_VALUE('{"a": "A"}', '$.c' RETURNING d1 DEFAULT 'A'::d2 ON EMPTY) = 'a'; -- error +SELECT JSON_VALUE('{"a": "A"}', '$.c' RETURNING d1 DEFAULT 'A' COLLATE "C" ON EMPTY) = 'a'; -- error +DROP DOMAIN d1, d2; -- cleanup RESET search_path; diff --git a/src/test/regress/sql/eager_aggregate.sql b/src/test/regress/sql/eager_aggregate.sql new file mode 100644 index 00000000000..abe6d6ae09f --- /dev/null +++ b/src/test/regress/sql/eager_aggregate.sql @@ -0,0 +1,377 @@ +-- +-- EAGER AGGREGATION +-- Test we can push aggregation down below join +-- + +CREATE TABLE eager_agg_t1 (a int, b int, c double precision); +CREATE TABLE eager_agg_t2 (a int, b int, c double precision); +CREATE TABLE eager_agg_t3 (a int, b int, c double precision); + +INSERT INTO eager_agg_t1 SELECT i, i, i FROM generate_series(1, 1000) i; +INSERT INTO eager_agg_t2 SELECT i, i%10, i FROM generate_series(1, 1000) i; +INSERT INTO eager_agg_t3 SELECT i%10, i%10, i FROM generate_series(1, 1000) i; + +ANALYZE eager_agg_t1; +ANALYZE eager_agg_t2; +ANALYZE eager_agg_t3; + + +-- +-- Test eager aggregation over base rel +-- + +-- Perform scan of a table, aggregate the result, join it to the other table +-- and finalize the aggregation. +EXPLAIN (VERBOSE, COSTS OFF) +SELECT t1.a, avg(t2.c) + FROM eager_agg_t1 t1 + JOIN eager_agg_t2 t2 ON t1.b = t2.b +GROUP BY t1.a ORDER BY t1.a; + +SELECT t1.a, avg(t2.c) + FROM eager_agg_t1 t1 + JOIN eager_agg_t2 t2 ON t1.b = t2.b +GROUP BY t1.a ORDER BY t1.a; + +-- Produce results with sorting aggregation +SET enable_hashagg TO off; + +EXPLAIN (VERBOSE, COSTS OFF) +SELECT t1.a, avg(t2.c) + FROM eager_agg_t1 t1 + JOIN eager_agg_t2 t2 ON t1.b = t2.b +GROUP BY t1.a ORDER BY t1.a; + +SELECT t1.a, avg(t2.c) + FROM eager_agg_t1 t1 + JOIN eager_agg_t2 t2 ON t1.b = t2.b +GROUP BY t1.a ORDER BY t1.a; + +RESET enable_hashagg; + + +-- +-- Test eager aggregation over join rel +-- + +-- Perform join of tables, aggregate the result, join it to the other table +-- and finalize the aggregation. +EXPLAIN (VERBOSE, COSTS OFF) +SELECT t1.a, avg(t2.c + t3.c) + FROM eager_agg_t1 t1 + JOIN eager_agg_t2 t2 ON t1.b = t2.b + JOIN eager_agg_t3 t3 ON t2.a = t3.a +GROUP BY t1.a ORDER BY t1.a; + +SELECT t1.a, avg(t2.c + t3.c) + FROM eager_agg_t1 t1 + JOIN eager_agg_t2 t2 ON t1.b = t2.b + JOIN eager_agg_t3 t3 ON t2.a = t3.a +GROUP BY t1.a ORDER BY t1.a; + +-- Produce results with sorting aggregation +SET enable_hashagg TO off; + +EXPLAIN (VERBOSE, COSTS OFF) +SELECT t1.a, avg(t2.c + t3.c) + FROM eager_agg_t1 t1 + JOIN eager_agg_t2 t2 ON t1.b = t2.b + JOIN eager_agg_t3 t3 ON t2.a = t3.a +GROUP BY t1.a ORDER BY t1.a; + +SELECT t1.a, avg(t2.c + t3.c) + FROM eager_agg_t1 t1 + JOIN eager_agg_t2 t2 ON t1.b = t2.b + JOIN eager_agg_t3 t3 ON t2.a = t3.a +GROUP BY t1.a ORDER BY t1.a; + +RESET enable_hashagg; + + +-- +-- Test that eager aggregation works for outer join +-- + +-- Ensure aggregation can be pushed down to the non-nullable side +EXPLAIN (VERBOSE, COSTS OFF) +SELECT t1.a, avg(t2.c) + FROM eager_agg_t1 t1 + RIGHT JOIN eager_agg_t2 t2 ON t1.b = t2.b +GROUP BY t1.a ORDER BY t1.a; + +SELECT t1.a, avg(t2.c) + FROM eager_agg_t1 t1 + RIGHT JOIN eager_agg_t2 t2 ON t1.b = t2.b +GROUP BY t1.a ORDER BY t1.a; + +-- Ensure aggregation cannot be pushed down to the nullable side +EXPLAIN (VERBOSE, COSTS OFF) +SELECT t2.b, avg(t2.c) + FROM eager_agg_t1 t1 + LEFT JOIN eager_agg_t2 t2 ON t1.b = t2.b +GROUP BY t2.b ORDER BY t2.b; + +SELECT t2.b, avg(t2.c) + FROM eager_agg_t1 t1 + LEFT JOIN eager_agg_t2 t2 ON t1.b = t2.b +GROUP BY t2.b ORDER BY t2.b; + + +-- +-- Test that eager aggregation works for parallel plans +-- + +SET parallel_setup_cost=0; +SET parallel_tuple_cost=0; +SET min_parallel_table_scan_size=0; +SET max_parallel_workers_per_gather=4; + +EXPLAIN (VERBOSE, COSTS OFF) +SELECT t1.a, avg(t2.c) + FROM eager_agg_t1 t1 + JOIN eager_agg_t2 t2 ON t1.b = t2.b +GROUP BY t1.a ORDER BY t1.a; + +SELECT t1.a, avg(t2.c) + FROM eager_agg_t1 t1 + JOIN eager_agg_t2 t2 ON t1.b = t2.b +GROUP BY t1.a ORDER BY t1.a; + +RESET parallel_setup_cost; +RESET parallel_tuple_cost; +RESET min_parallel_table_scan_size; +RESET max_parallel_workers_per_gather; + +-- +-- Test eager aggregation with GEQO +-- + +SET geqo = on; +SET geqo_threshold = 2; + +EXPLAIN (VERBOSE, COSTS OFF) +SELECT t1.a, avg(t2.c) + FROM eager_agg_t1 t1 + JOIN eager_agg_t2 t2 ON t1.b = t2.b +GROUP BY t1.a ORDER BY t1.a; + +SELECT t1.a, avg(t2.c) + FROM eager_agg_t1 t1 + JOIN eager_agg_t2 t2 ON t1.b = t2.b +GROUP BY t1.a ORDER BY t1.a; + +RESET geqo; +RESET geqo_threshold; + +DROP TABLE eager_agg_t1; +DROP TABLE eager_agg_t2; +DROP TABLE eager_agg_t3; + + +-- +-- Test eager aggregation for partitionwise join +-- + +-- Enable partitionwise aggregate, which by default is disabled. +SET enable_partitionwise_aggregate TO true; +-- Enable partitionwise join, which by default is disabled. +SET enable_partitionwise_join TO true; + +CREATE TABLE eager_agg_tab1(x int, y int) PARTITION BY RANGE(x); +CREATE TABLE eager_agg_tab1_p1 PARTITION OF eager_agg_tab1 FOR VALUES FROM (0) TO (5); +CREATE TABLE eager_agg_tab1_p2 PARTITION OF eager_agg_tab1 FOR VALUES FROM (5) TO (10); +CREATE TABLE eager_agg_tab1_p3 PARTITION OF eager_agg_tab1 FOR VALUES FROM (10) TO (15); +CREATE TABLE eager_agg_tab2(x int, y int) PARTITION BY RANGE(y); +CREATE TABLE eager_agg_tab2_p1 PARTITION OF eager_agg_tab2 FOR VALUES FROM (0) TO (5); +CREATE TABLE eager_agg_tab2_p2 PARTITION OF eager_agg_tab2 FOR VALUES FROM (5) TO (10); +CREATE TABLE eager_agg_tab2_p3 PARTITION OF eager_agg_tab2 FOR VALUES FROM (10) TO (15); +INSERT INTO eager_agg_tab1 SELECT i % 15, i % 10 FROM generate_series(1, 1000) i; +INSERT INTO eager_agg_tab2 SELECT i % 10, i % 15 FROM generate_series(1, 1000) i; + +ANALYZE eager_agg_tab1; +ANALYZE eager_agg_tab2; + +-- When GROUP BY clause matches; full aggregation is performed for each +-- partition. +EXPLAIN (VERBOSE, COSTS OFF) +SELECT t1.x, sum(t1.y), count(*) + FROM eager_agg_tab1 t1 + JOIN eager_agg_tab2 t2 ON t1.x = t2.y +GROUP BY t1.x ORDER BY t1.x; + +SELECT t1.x, sum(t1.y), count(*) + FROM eager_agg_tab1 t1 + JOIN eager_agg_tab2 t2 ON t1.x = t2.y +GROUP BY t1.x ORDER BY t1.x; + +-- GROUP BY having other matching key +EXPLAIN (VERBOSE, COSTS OFF) +SELECT t2.y, sum(t1.y), count(*) + FROM eager_agg_tab1 t1 + JOIN eager_agg_tab2 t2 ON t1.x = t2.y +GROUP BY t2.y ORDER BY t2.y; + +SELECT t2.y, sum(t1.y), count(*) + FROM eager_agg_tab1 t1 + JOIN eager_agg_tab2 t2 ON t1.x = t2.y +GROUP BY t2.y ORDER BY t2.y; + +-- When GROUP BY clause does not match; partial aggregation is performed for +-- each partition. +EXPLAIN (VERBOSE, COSTS OFF) +SELECT t2.x, sum(t1.x), count(*) + FROM eager_agg_tab1 t1 + JOIN eager_agg_tab2 t2 ON t1.x = t2.y +GROUP BY t2.x HAVING avg(t1.x) > 5 ORDER BY t2.x; + +SELECT t2.x, sum(t1.x), count(*) + FROM eager_agg_tab1 t1 + JOIN eager_agg_tab2 t2 ON t1.x = t2.y +GROUP BY t2.x HAVING avg(t1.x) > 5 ORDER BY t2.x; + +-- Check with eager aggregation over join rel +-- full aggregation +EXPLAIN (VERBOSE, COSTS OFF) +SELECT t1.x, sum(t2.y + t3.y) + FROM eager_agg_tab1 t1 + JOIN eager_agg_tab1 t2 ON t1.x = t2.x + JOIN eager_agg_tab1 t3 ON t2.x = t3.x +GROUP BY t1.x ORDER BY t1.x; + +SELECT t1.x, sum(t2.y + t3.y) + FROM eager_agg_tab1 t1 + JOIN eager_agg_tab1 t2 ON t1.x = t2.x + JOIN eager_agg_tab1 t3 ON t2.x = t3.x +GROUP BY t1.x ORDER BY t1.x; + +-- partial aggregation +SET enable_hashagg TO off; +SET max_parallel_workers_per_gather TO 0; + +EXPLAIN (VERBOSE, COSTS OFF) +SELECT t3.y, sum(t2.y + t3.y) + FROM eager_agg_tab1 t1 + JOIN eager_agg_tab1 t2 ON t1.x = t2.x + JOIN eager_agg_tab1 t3 ON t2.x = t3.x +GROUP BY t3.y ORDER BY t3.y; + +SELECT t3.y, sum(t2.y + t3.y) + FROM eager_agg_tab1 t1 + JOIN eager_agg_tab1 t2 ON t1.x = t2.x + JOIN eager_agg_tab1 t3 ON t2.x = t3.x +GROUP BY t3.y ORDER BY t3.y; + +RESET enable_hashagg; +RESET max_parallel_workers_per_gather; + +-- try that with GEQO too +SET geqo = on; +SET geqo_threshold = 2; + +EXPLAIN (VERBOSE, COSTS OFF) +SELECT t1.x, sum(t1.y), count(*) + FROM eager_agg_tab1 t1 + JOIN eager_agg_tab2 t2 ON t1.x = t2.y +GROUP BY t1.x ORDER BY t1.x; + +SELECT t1.x, sum(t1.y), count(*) + FROM eager_agg_tab1 t1 + JOIN eager_agg_tab2 t2 ON t1.x = t2.y +GROUP BY t1.x ORDER BY t1.x; + +RESET geqo; +RESET geqo_threshold; + +DROP TABLE eager_agg_tab1; +DROP TABLE eager_agg_tab2; + + +-- +-- Test with multi-level partitioning scheme +-- +CREATE TABLE eager_agg_tab_ml(x int, y int) PARTITION BY RANGE(x); +CREATE TABLE eager_agg_tab_ml_p1 PARTITION OF eager_agg_tab_ml FOR VALUES FROM (0) TO (10); +CREATE TABLE eager_agg_tab_ml_p2 PARTITION OF eager_agg_tab_ml FOR VALUES FROM (10) TO (20) PARTITION BY RANGE(x); +CREATE TABLE eager_agg_tab_ml_p2_s1 PARTITION OF eager_agg_tab_ml_p2 FOR VALUES FROM (10) TO (15); +CREATE TABLE eager_agg_tab_ml_p2_s2 PARTITION OF eager_agg_tab_ml_p2 FOR VALUES FROM (15) TO (20); +CREATE TABLE eager_agg_tab_ml_p3 PARTITION OF eager_agg_tab_ml FOR VALUES FROM (20) TO (30) PARTITION BY RANGE(x); +CREATE TABLE eager_agg_tab_ml_p3_s1 PARTITION OF eager_agg_tab_ml_p3 FOR VALUES FROM (20) TO (25); +CREATE TABLE eager_agg_tab_ml_p3_s2 PARTITION OF eager_agg_tab_ml_p3 FOR VALUES FROM (25) TO (30); +INSERT INTO eager_agg_tab_ml SELECT i % 30, i % 30 FROM generate_series(1, 1000) i; + +ANALYZE eager_agg_tab_ml; + +-- When GROUP BY clause matches; full aggregation is performed for each +-- partition. +EXPLAIN (VERBOSE, COSTS OFF) +SELECT t1.x, sum(t2.y), count(*) + FROM eager_agg_tab_ml t1 + JOIN eager_agg_tab_ml t2 ON t1.x = t2.x +GROUP BY t1.x ORDER BY t1.x; + +SELECT t1.x, sum(t2.y), count(*) + FROM eager_agg_tab_ml t1 + JOIN eager_agg_tab_ml t2 ON t1.x = t2.x +GROUP BY t1.x ORDER BY t1.x; + +-- When GROUP BY clause does not match; partial aggregation is performed for +-- each partition. +EXPLAIN (VERBOSE, COSTS OFF) +SELECT t1.y, sum(t2.y), count(*) + FROM eager_agg_tab_ml t1 + JOIN eager_agg_tab_ml t2 ON t1.x = t2.x +GROUP BY t1.y ORDER BY t1.y; + +SELECT t1.y, sum(t2.y), count(*) + FROM eager_agg_tab_ml t1 + JOIN eager_agg_tab_ml t2 ON t1.x = t2.x +GROUP BY t1.y ORDER BY t1.y; + +-- Check with eager aggregation over join rel +-- full aggregation +EXPLAIN (VERBOSE, COSTS OFF) +SELECT t1.x, sum(t2.y + t3.y), count(*) + FROM eager_agg_tab_ml t1 + JOIN eager_agg_tab_ml t2 ON t1.x = t2.x + JOIN eager_agg_tab_ml t3 ON t2.x = t3.x +GROUP BY t1.x ORDER BY t1.x; + +SELECT t1.x, sum(t2.y + t3.y), count(*) + FROM eager_agg_tab_ml t1 + JOIN eager_agg_tab_ml t2 ON t1.x = t2.x + JOIN eager_agg_tab_ml t3 ON t2.x = t3.x +GROUP BY t1.x ORDER BY t1.x; + +-- partial aggregation +EXPLAIN (VERBOSE, COSTS OFF) +SELECT t3.y, sum(t2.y + t3.y), count(*) + FROM eager_agg_tab_ml t1 + JOIN eager_agg_tab_ml t2 ON t1.x = t2.x + JOIN eager_agg_tab_ml t3 ON t2.x = t3.x +GROUP BY t3.y ORDER BY t3.y; + +SELECT t3.y, sum(t2.y + t3.y), count(*) + FROM eager_agg_tab_ml t1 + JOIN eager_agg_tab_ml t2 ON t1.x = t2.x + JOIN eager_agg_tab_ml t3 ON t2.x = t3.x +GROUP BY t3.y ORDER BY t3.y; + +-- try that with GEQO too +SET geqo = on; +SET geqo_threshold = 2; + +EXPLAIN (VERBOSE, COSTS OFF) +SELECT t1.x, sum(t2.y), count(*) + FROM eager_agg_tab_ml t1 + JOIN eager_agg_tab_ml t2 ON t1.x = t2.x +GROUP BY t1.x ORDER BY t1.x; + +SELECT t1.x, sum(t2.y), count(*) + FROM eager_agg_tab_ml t1 + JOIN eager_agg_tab_ml t2 ON t1.x = t2.x +GROUP BY t1.x ORDER BY t1.x; + +RESET geqo; +RESET geqo_threshold; + +DROP TABLE eager_agg_tab_ml; diff --git a/src/test/regress/sql/opr_sanity.sql b/src/test/regress/sql/opr_sanity.sql index 2fb3a852878..cd674d7dbca 100644 --- a/src/test/regress/sql/opr_sanity.sql +++ b/src/test/regress/sql/opr_sanity.sql @@ -847,7 +847,7 @@ WHERE aggfnoid = 0 OR aggtransfn = 0 OR (aggkind = 'n' AND aggnumdirectargs > 0) OR aggfinalmodify NOT IN ('r', 's', 'w') OR aggmfinalmodify NOT IN ('r', 's', 'w') OR - aggtranstype = 0 OR aggtransspace < 0 OR aggmtransspace < 0; + aggtranstype = 0 OR aggmtransspace < 0; -- Make sure the matching pg_proc entry is sensible, too. diff --git a/src/test/regress/sql/partition_aggregate.sql b/src/test/regress/sql/partition_aggregate.sql index ab070fee244..124cc260461 100644 --- a/src/test/regress/sql/partition_aggregate.sql +++ b/src/test/regress/sql/partition_aggregate.sql @@ -14,6 +14,8 @@ SET enable_partitionwise_join TO true; SET max_parallel_workers_per_gather TO 0; -- Disable incremental sort, which can influence selected plans due to fuzz factor. SET enable_incremental_sort TO off; +-- Disable eager aggregation, which can interfere with the generation of partitionwise aggregation. +SET enable_eager_aggregate TO off; -- -- Tests for list partitioned tables. diff --git a/src/test/regress/sql/publication.sql b/src/test/regress/sql/publication.sql index 3f423061395..00390aecd47 100644 --- a/src/test/regress/sql/publication.sql +++ b/src/test/regress/sql/publication.sql @@ -120,6 +120,52 @@ RESET client_min_messages; DROP TABLE testpub_tbl3, testpub_tbl3a; DROP PUBLICATION testpub3, testpub4; +--- Tests for publications with SEQUENCES +CREATE SEQUENCE regress_pub_seq0; +CREATE SEQUENCE pub_test.regress_pub_seq1; + +-- FOR ALL SEQUENCES +SET client_min_messages = 'ERROR'; +CREATE PUBLICATION regress_pub_forallsequences1 FOR ALL SEQUENCES; +RESET client_min_messages; + +SELECT pubname, puballtables, puballsequences FROM pg_publication WHERE pubname = 'regress_pub_forallsequences1'; +\d+ regress_pub_seq0 +\dRp+ regress_pub_forallsequences1 + +SET client_min_messages = 'ERROR'; +CREATE PUBLICATION regress_pub_forallsequences2 FOR ALL SEQUENCES; +RESET client_min_messages; + +-- check that describe sequence lists both publications the sequence belongs to +\d+ pub_test.regress_pub_seq1 + +--- Specifying both ALL TABLES and ALL SEQUENCES +SET client_min_messages = 'ERROR'; +CREATE PUBLICATION regress_pub_for_allsequences_alltables FOR ALL SEQUENCES, ALL TABLES; + +-- Specifying WITH clause in an ALL SEQUENCES publication will emit a NOTICE. +SET client_min_messages = 'NOTICE'; +CREATE PUBLICATION regress_pub_for_allsequences_alltables_withclause FOR ALL SEQUENCES, ALL TABLES WITH (publish = 'insert'); +CREATE PUBLICATION regress_pub_for_allsequences_withclause FOR ALL SEQUENCES WITH (publish_generated_columns = 'stored'); +RESET client_min_messages; + +SELECT pubname, puballtables, puballsequences FROM pg_publication WHERE pubname = 'regress_pub_for_allsequences_alltables'; +\dRp+ regress_pub_for_allsequences_alltables + +DROP SEQUENCE regress_pub_seq0, pub_test.regress_pub_seq1; +DROP PUBLICATION regress_pub_forallsequences1; +DROP PUBLICATION regress_pub_forallsequences2; +DROP PUBLICATION regress_pub_for_allsequences_alltables; +DROP PUBLICATION regress_pub_for_allsequences_alltables_withclause; +DROP PUBLICATION regress_pub_for_allsequences_withclause; + +-- fail - Specifying ALL TABLES more than once +CREATE PUBLICATION regress_pub_for_allsequences_alltables FOR ALL SEQUENCES, ALL TABLES, ALL TABLES; + +-- fail - Specifying ALL SEQUENCES more than once +CREATE PUBLICATION regress_pub_for_allsequences_alltables FOR ALL SEQUENCES, ALL TABLES, ALL SEQUENCES; + -- Tests for partitioned tables SET client_min_messages = 'ERROR'; CREATE PUBLICATION testpub_forparted; diff --git a/src/test/regress/sql/window.sql b/src/test/regress/sql/window.sql index 85fc621c8db..37d837a2f66 100644 --- a/src/test/regress/sql/window.sql +++ b/src/test/regress/sql/window.sql @@ -1522,6 +1522,19 @@ SELECT * FROM FROM empsalary) emp WHERE first_emp = 1 OR last_emp = 1; +CREATE INDEX empsalary_salary_empno_idx ON empsalary (salary, empno); + +SET enable_seqscan = 0; + +-- Ensure no sorting is done and that the IndexScan maintains all pathkeys +-- useful for the final sort order. +EXPLAIN (COSTS OFF) +SELECT salary, empno, row_number() OVER (ORDER BY salary) rn +FROM empsalary +ORDER BY salary, empno; + +RESET enable_seqscan; + -- cleanup DROP TABLE empsalary; |