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Diffstat (limited to 'src/test/regress/expected/tsrf.out')
-rw-r--r-- | src/test/regress/expected/tsrf.out | 712 |
1 files changed, 712 insertions, 0 deletions
diff --git a/src/test/regress/expected/tsrf.out b/src/test/regress/expected/tsrf.out new file mode 100644 index 0000000..d47b5f6 --- /dev/null +++ b/src/test/regress/expected/tsrf.out @@ -0,0 +1,712 @@ +-- +-- tsrf - targetlist set returning function tests +-- +-- simple srf +SELECT generate_series(1, 3); + generate_series +----------------- + 1 + 2 + 3 +(3 rows) + +-- parallel iteration +SELECT generate_series(1, 3), generate_series(3,5); + generate_series | generate_series +-----------------+----------------- + 1 | 3 + 2 | 4 + 3 | 5 +(3 rows) + +-- parallel iteration, different number of rows +SELECT generate_series(1, 2), generate_series(1,4); + generate_series | generate_series +-----------------+----------------- + 1 | 1 + 2 | 2 + | 3 + | 4 +(4 rows) + +-- srf, with SRF argument +SELECT generate_series(1, generate_series(1, 3)); + generate_series +----------------- + 1 + 1 + 2 + 1 + 2 + 3 +(6 rows) + +-- but we've traditionally rejected the same in FROM +SELECT * FROM generate_series(1, generate_series(1, 3)); +ERROR: set-returning functions must appear at top level of FROM +LINE 1: SELECT * FROM generate_series(1, generate_series(1, 3)); + ^ +-- srf, with two SRF arguments +SELECT generate_series(generate_series(1,3), generate_series(2, 4)); + generate_series +----------------- + 1 + 2 + 2 + 3 + 3 + 4 +(6 rows) + +-- check proper nesting of SRFs in different expressions +explain (verbose, costs off) +SELECT generate_series(1, generate_series(1, 3)), generate_series(2, 4); + QUERY PLAN +-------------------------------------------------------------------------------- + ProjectSet + Output: generate_series(1, (generate_series(1, 3))), (generate_series(2, 4)) + -> ProjectSet + Output: generate_series(1, 3), generate_series(2, 4) + -> Result +(5 rows) + +SELECT generate_series(1, generate_series(1, 3)), generate_series(2, 4); + generate_series | generate_series +-----------------+----------------- + 1 | 2 + 1 | 3 + 2 | 3 + 1 | 4 + 2 | 4 + 3 | 4 +(6 rows) + +CREATE TABLE few(id int, dataa text, datab text); +INSERT INTO few VALUES(1, 'a', 'foo'),(2, 'a', 'bar'),(3, 'b', 'bar'); +-- SRF with a provably-dummy relation +explain (verbose, costs off) +SELECT unnest(ARRAY[1, 2]) FROM few WHERE false; + QUERY PLAN +-------------------------------------- + ProjectSet + Output: unnest('{1,2}'::integer[]) + -> Result + One-Time Filter: false +(4 rows) + +SELECT unnest(ARRAY[1, 2]) FROM few WHERE false; + unnest +-------- +(0 rows) + +-- SRF shouldn't prevent upper query from recognizing lower as dummy +explain (verbose, costs off) +SELECT * FROM few f1, + (SELECT unnest(ARRAY[1,2]) FROM few f2 WHERE false OFFSET 0) ss; + QUERY PLAN +------------------------------------------------ + Result + Output: f1.id, f1.dataa, f1.datab, ss.unnest + One-Time Filter: false +(3 rows) + +SELECT * FROM few f1, + (SELECT unnest(ARRAY[1,2]) FROM few f2 WHERE false OFFSET 0) ss; + id | dataa | datab | unnest +----+-------+-------+-------- +(0 rows) + +-- SRF output order of sorting is maintained, if SRF is not referenced +SELECT few.id, generate_series(1,3) g FROM few ORDER BY id DESC; + id | g +----+--- + 3 | 1 + 3 | 2 + 3 | 3 + 2 | 1 + 2 | 2 + 2 | 3 + 1 | 1 + 1 | 2 + 1 | 3 +(9 rows) + +-- but SRFs can be referenced in sort +SELECT few.id, generate_series(1,3) g FROM few ORDER BY id, g DESC; + id | g +----+--- + 1 | 3 + 1 | 2 + 1 | 1 + 2 | 3 + 2 | 2 + 2 | 1 + 3 | 3 + 3 | 2 + 3 | 1 +(9 rows) + +SELECT few.id, generate_series(1,3) g FROM few ORDER BY id, generate_series(1,3) DESC; + id | g +----+--- + 1 | 3 + 1 | 2 + 1 | 1 + 2 | 3 + 2 | 2 + 2 | 1 + 3 | 3 + 3 | 2 + 3 | 1 +(9 rows) + +-- it's weird to have ORDER BYs that increase the number of results +SELECT few.id FROM few ORDER BY id, generate_series(1,3) DESC; + id +---- + 1 + 1 + 1 + 2 + 2 + 2 + 3 + 3 + 3 +(9 rows) + +-- SRFs are computed after aggregation +SET enable_hashagg TO 0; -- stable output order +SELECT few.dataa, count(*), min(id), max(id), unnest('{1,1,3}'::int[]) FROM few WHERE few.id = 1 GROUP BY few.dataa; + dataa | count | min | max | unnest +-------+-------+-----+-----+-------- + a | 1 | 1 | 1 | 1 + a | 1 | 1 | 1 | 1 + a | 1 | 1 | 1 | 3 +(3 rows) + +-- unless referenced in GROUP BY clause +SELECT few.dataa, count(*), min(id), max(id), unnest('{1,1,3}'::int[]) FROM few WHERE few.id = 1 GROUP BY few.dataa, unnest('{1,1,3}'::int[]); + dataa | count | min | max | unnest +-------+-------+-----+-----+-------- + a | 2 | 1 | 1 | 1 + a | 1 | 1 | 1 | 3 +(2 rows) + +SELECT few.dataa, count(*), min(id), max(id), unnest('{1,1,3}'::int[]) FROM few WHERE few.id = 1 GROUP BY few.dataa, 5; + dataa | count | min | max | unnest +-------+-------+-----+-----+-------- + a | 2 | 1 | 1 | 1 + a | 1 | 1 | 1 | 3 +(2 rows) + +RESET enable_hashagg; +-- check HAVING works when GROUP BY does [not] reference SRF output +SELECT dataa, generate_series(1,1), count(*) FROM few GROUP BY 1 HAVING count(*) > 1; + dataa | generate_series | count +-------+-----------------+------- + a | 1 | 2 +(1 row) + +SELECT dataa, generate_series(1,1), count(*) FROM few GROUP BY 1, 2 HAVING count(*) > 1; + dataa | generate_series | count +-------+-----------------+------- + a | 1 | 2 +(1 row) + +-- it's weird to have GROUP BYs that increase the number of results +SELECT few.dataa, count(*) FROM few WHERE dataa = 'a' GROUP BY few.dataa ORDER BY 2; + dataa | count +-------+------- + a | 2 +(1 row) + +SELECT few.dataa, count(*) FROM few WHERE dataa = 'a' GROUP BY few.dataa, unnest('{1,1,3}'::int[]) ORDER BY 2; + dataa | count +-------+------- + a | 2 + a | 4 +(2 rows) + +-- SRFs are not allowed if they'd need to be conditionally executed +SELECT q1, case when q1 > 0 then generate_series(1,3) else 0 end FROM int8_tbl; +ERROR: set-returning functions are not allowed in CASE +LINE 1: SELECT q1, case when q1 > 0 then generate_series(1,3) else 0... + ^ +HINT: You might be able to move the set-returning function into a LATERAL FROM item. +SELECT q1, coalesce(generate_series(1,3), 0) FROM int8_tbl; +ERROR: set-returning functions are not allowed in COALESCE +LINE 1: SELECT q1, coalesce(generate_series(1,3), 0) FROM int8_tbl; + ^ +HINT: You might be able to move the set-returning function into a LATERAL FROM item. +-- SRFs are not allowed in aggregate arguments +SELECT min(generate_series(1, 3)) FROM few; +ERROR: aggregate function calls cannot contain set-returning function calls +LINE 1: SELECT min(generate_series(1, 3)) FROM few; + ^ +HINT: You might be able to move the set-returning function into a LATERAL FROM item. +-- ... unless they're within a sub-select +SELECT sum((3 = ANY(SELECT generate_series(1,4)))::int); + sum +----- + 1 +(1 row) + +SELECT sum((3 = ANY(SELECT lag(x) over(order by x) + FROM generate_series(1,4) x))::int); + sum +----- + 1 +(1 row) + +-- SRFs are not allowed in window function arguments, either +SELECT min(generate_series(1, 3)) OVER() FROM few; +ERROR: window function calls cannot contain set-returning function calls +LINE 1: SELECT min(generate_series(1, 3)) OVER() FROM few; + ^ +HINT: You might be able to move the set-returning function into a LATERAL FROM item. +-- SRFs are normally computed after window functions +SELECT id,lag(id) OVER(), count(*) OVER(), generate_series(1,3) FROM few; + id | lag | count | generate_series +----+-----+-------+----------------- + 1 | | 3 | 1 + 1 | | 3 | 2 + 1 | | 3 | 3 + 2 | 1 | 3 | 1 + 2 | 1 | 3 | 2 + 2 | 1 | 3 | 3 + 3 | 2 | 3 | 1 + 3 | 2 | 3 | 2 + 3 | 2 | 3 | 3 +(9 rows) + +-- unless referencing SRFs +SELECT SUM(count(*)) OVER(PARTITION BY generate_series(1,3) ORDER BY generate_series(1,3)), generate_series(1,3) g FROM few GROUP BY g; + sum | g +-----+--- + 3 | 1 + 3 | 2 + 3 | 3 +(3 rows) + +-- sorting + grouping +SELECT few.dataa, count(*), min(id), max(id), generate_series(1,3) FROM few GROUP BY few.dataa ORDER BY 5, 1; + dataa | count | min | max | generate_series +-------+-------+-----+-----+----------------- + a | 2 | 1 | 2 | 1 + b | 1 | 3 | 3 | 1 + a | 2 | 1 | 2 | 2 + b | 1 | 3 | 3 | 2 + a | 2 | 1 | 2 | 3 + b | 1 | 3 | 3 | 3 +(6 rows) + +-- grouping sets are a bit special, they produce NULLs in columns not actually NULL +set enable_hashagg = false; +SELECT dataa, datab b, generate_series(1,2) g, count(*) FROM few GROUP BY CUBE(dataa, datab); + dataa | b | g | count +-------+-----+---+------- + a | bar | 1 | 1 + a | bar | 2 | 1 + a | foo | 1 | 1 + a | foo | 2 | 1 + a | | 1 | 2 + a | | 2 | 2 + b | bar | 1 | 1 + b | bar | 2 | 1 + b | | 1 | 1 + b | | 2 | 1 + | | 1 | 3 + | | 2 | 3 + | bar | 1 | 2 + | bar | 2 | 2 + | foo | 1 | 1 + | foo | 2 | 1 +(16 rows) + +SELECT dataa, datab b, generate_series(1,2) g, count(*) FROM few GROUP BY CUBE(dataa, datab) ORDER BY dataa; + dataa | b | g | count +-------+-----+---+------- + a | bar | 1 | 1 + a | bar | 2 | 1 + a | foo | 1 | 1 + a | foo | 2 | 1 + a | | 1 | 2 + a | | 2 | 2 + b | bar | 1 | 1 + b | bar | 2 | 1 + b | | 1 | 1 + b | | 2 | 1 + | | 1 | 3 + | | 2 | 3 + | bar | 1 | 2 + | bar | 2 | 2 + | foo | 1 | 1 + | foo | 2 | 1 +(16 rows) + +SELECT dataa, datab b, generate_series(1,2) g, count(*) FROM few GROUP BY CUBE(dataa, datab) ORDER BY g; + dataa | b | g | count +-------+-----+---+------- + a | bar | 1 | 1 + a | foo | 1 | 1 + a | | 1 | 2 + b | bar | 1 | 1 + b | | 1 | 1 + | | 1 | 3 + | bar | 1 | 2 + | foo | 1 | 1 + | foo | 2 | 1 + a | bar | 2 | 1 + b | | 2 | 1 + a | foo | 2 | 1 + | bar | 2 | 2 + a | | 2 | 2 + | | 2 | 3 + b | bar | 2 | 1 +(16 rows) + +SELECT dataa, datab b, generate_series(1,2) g, count(*) FROM few GROUP BY CUBE(dataa, datab, g); + dataa | b | g | count +-------+-----+---+------- + a | bar | 1 | 1 + a | bar | 2 | 1 + a | bar | | 2 + a | foo | 1 | 1 + a | foo | 2 | 1 + a | foo | | 2 + a | | | 4 + b | bar | 1 | 1 + b | bar | 2 | 1 + b | bar | | 2 + b | | | 2 + | | | 6 + | bar | 1 | 2 + | bar | 2 | 2 + | bar | | 4 + | foo | 1 | 1 + | foo | 2 | 1 + | foo | | 2 + a | | 1 | 2 + b | | 1 | 1 + | | 1 | 3 + a | | 2 | 2 + b | | 2 | 1 + | | 2 | 3 +(24 rows) + +SELECT dataa, datab b, generate_series(1,2) g, count(*) FROM few GROUP BY CUBE(dataa, datab, g) ORDER BY dataa; + dataa | b | g | count +-------+-----+---+------- + a | foo | | 2 + a | | | 4 + a | | 2 | 2 + a | bar | 1 | 1 + a | bar | 2 | 1 + a | bar | | 2 + a | foo | 1 | 1 + a | foo | 2 | 1 + a | | 1 | 2 + b | bar | 1 | 1 + b | | | 2 + b | | 1 | 1 + b | bar | 2 | 1 + b | bar | | 2 + b | | 2 | 1 + | | 2 | 3 + | | | 6 + | bar | 1 | 2 + | bar | 2 | 2 + | bar | | 4 + | foo | 1 | 1 + | foo | 2 | 1 + | foo | | 2 + | | 1 | 3 +(24 rows) + +SELECT dataa, datab b, generate_series(1,2) g, count(*) FROM few GROUP BY CUBE(dataa, datab, g) ORDER BY g; + dataa | b | g | count +-------+-----+---+------- + a | bar | 1 | 1 + a | foo | 1 | 1 + b | bar | 1 | 1 + | bar | 1 | 2 + | foo | 1 | 1 + a | | 1 | 2 + b | | 1 | 1 + | | 1 | 3 + a | | 2 | 2 + b | | 2 | 1 + | bar | 2 | 2 + | | 2 | 3 + | foo | 2 | 1 + a | bar | 2 | 1 + a | foo | 2 | 1 + b | bar | 2 | 1 + a | | | 4 + b | bar | | 2 + b | | | 2 + | | | 6 + a | foo | | 2 + a | bar | | 2 + | bar | | 4 + | foo | | 2 +(24 rows) + +reset enable_hashagg; +-- case with degenerate ORDER BY +explain (verbose, costs off) +select 'foo' as f, generate_series(1,2) as g from few order by 1; + QUERY PLAN +---------------------------------------------- + ProjectSet + Output: 'foo'::text, generate_series(1, 2) + -> Seq Scan on public.few + Output: id, dataa, datab +(4 rows) + +select 'foo' as f, generate_series(1,2) as g from few order by 1; + f | g +-----+--- + foo | 1 + foo | 2 + foo | 1 + foo | 2 + foo | 1 + foo | 2 +(6 rows) + +-- data modification +CREATE TABLE fewmore AS SELECT generate_series(1,3) AS data; +INSERT INTO fewmore VALUES(generate_series(4,5)); +SELECT * FROM fewmore; + data +------ + 1 + 2 + 3 + 4 + 5 +(5 rows) + +-- SRFs are not allowed in UPDATE (they once were, but it was nonsense) +UPDATE fewmore SET data = generate_series(4,9); +ERROR: set-returning functions are not allowed in UPDATE +LINE 1: UPDATE fewmore SET data = generate_series(4,9); + ^ +-- SRFs are not allowed in RETURNING +INSERT INTO fewmore VALUES(1) RETURNING generate_series(1,3); +ERROR: set-returning functions are not allowed in RETURNING +LINE 1: INSERT INTO fewmore VALUES(1) RETURNING generate_series(1,3)... + ^ +-- nor standalone VALUES (but surely this is a bug?) +VALUES(1, generate_series(1,2)); +ERROR: set-returning functions are not allowed in VALUES +LINE 1: VALUES(1, generate_series(1,2)); + ^ +-- We allow tSRFs that are not at top level +SELECT int4mul(generate_series(1,2), 10); + int4mul +--------- + 10 + 20 +(2 rows) + +SELECT generate_series(1,3) IS DISTINCT FROM 2; + ?column? +---------- + t + f + t +(3 rows) + +-- but SRFs in function RTEs must be at top level (annoying restriction) +SELECT * FROM int4mul(generate_series(1,2), 10); +ERROR: set-returning functions must appear at top level of FROM +LINE 1: SELECT * FROM int4mul(generate_series(1,2), 10); + ^ +-- DISTINCT ON is evaluated before tSRF evaluation if SRF is not +-- referenced either in ORDER BY or in the DISTINCT ON list. The ORDER +-- BY reference can be implicitly generated, if there's no other ORDER BY. +-- implicit reference (via implicit ORDER) to all columns +SELECT DISTINCT ON (a) a, b, generate_series(1,3) g +FROM (VALUES (3, 2), (3,1), (1,1), (1,4), (5,3), (5,1)) AS t(a, b); + a | b | g +---+---+--- + 1 | 1 | 1 + 3 | 2 | 1 + 5 | 3 | 1 +(3 rows) + +-- unreferenced in DISTINCT ON or ORDER BY +SELECT DISTINCT ON (a) a, b, generate_series(1,3) g +FROM (VALUES (3, 2), (3,1), (1,1), (1,4), (5,3), (5,1)) AS t(a, b) +ORDER BY a, b DESC; + a | b | g +---+---+--- + 1 | 4 | 1 + 1 | 4 | 2 + 1 | 4 | 3 + 3 | 2 | 1 + 3 | 2 | 2 + 3 | 2 | 3 + 5 | 3 | 1 + 5 | 3 | 2 + 5 | 3 | 3 +(9 rows) + +-- referenced in ORDER BY +SELECT DISTINCT ON (a) a, b, generate_series(1,3) g +FROM (VALUES (3, 2), (3,1), (1,1), (1,4), (5,3), (5,1)) AS t(a, b) +ORDER BY a, b DESC, g DESC; + a | b | g +---+---+--- + 1 | 4 | 3 + 3 | 2 | 3 + 5 | 3 | 3 +(3 rows) + +-- referenced in ORDER BY and DISTINCT ON +SELECT DISTINCT ON (a, b, g) a, b, generate_series(1,3) g +FROM (VALUES (3, 2), (3,1), (1,1), (1,4), (5,3), (5,1)) AS t(a, b) +ORDER BY a, b DESC, g DESC; + a | b | g +---+---+--- + 1 | 4 | 3 + 1 | 4 | 2 + 1 | 4 | 1 + 1 | 1 | 3 + 1 | 1 | 2 + 1 | 1 | 1 + 3 | 2 | 3 + 3 | 2 | 2 + 3 | 2 | 1 + 3 | 1 | 3 + 3 | 1 | 2 + 3 | 1 | 1 + 5 | 3 | 3 + 5 | 3 | 2 + 5 | 3 | 1 + 5 | 1 | 3 + 5 | 1 | 2 + 5 | 1 | 1 +(18 rows) + +-- only SRF mentioned in DISTINCT ON +SELECT DISTINCT ON (g) a, b, generate_series(1,3) g +FROM (VALUES (3, 2), (3,1), (1,1), (1,4), (5,3), (5,1)) AS t(a, b); + a | b | g +---+---+--- + 3 | 2 | 1 + 5 | 1 | 2 + 3 | 1 | 3 +(3 rows) + +-- LIMIT / OFFSET is evaluated after SRF evaluation +SELECT a, generate_series(1,2) FROM (VALUES(1),(2),(3)) r(a) LIMIT 2 OFFSET 2; + a | generate_series +---+----------------- + 2 | 1 + 2 | 2 +(2 rows) + +-- SRFs are not allowed in LIMIT. +SELECT 1 LIMIT generate_series(1,3); +ERROR: set-returning functions are not allowed in LIMIT +LINE 1: SELECT 1 LIMIT generate_series(1,3); + ^ +-- tSRF in correlated subquery, referencing table outside +SELECT (SELECT generate_series(1,3) LIMIT 1 OFFSET few.id) FROM few; + generate_series +----------------- + 2 + 3 + +(3 rows) + +-- tSRF in correlated subquery, referencing SRF outside +SELECT (SELECT generate_series(1,3) LIMIT 1 OFFSET g.i) FROM generate_series(0,3) g(i); + generate_series +----------------- + 1 + 2 + 3 + +(4 rows) + +-- Operators can return sets too +CREATE OPERATOR |@| (PROCEDURE = unnest, RIGHTARG = ANYARRAY); +SELECT |@|ARRAY[1,2,3]; + ?column? +---------- + 1 + 2 + 3 +(3 rows) + +-- Some fun cases involving duplicate SRF calls +explain (verbose, costs off) +select generate_series(1,3) as x, generate_series(1,3) + 1 as xp1; + QUERY PLAN +------------------------------------------------------------------ + Result + Output: (generate_series(1, 3)), ((generate_series(1, 3)) + 1) + -> ProjectSet + Output: generate_series(1, 3) + -> Result +(5 rows) + +select generate_series(1,3) as x, generate_series(1,3) + 1 as xp1; + x | xp1 +---+----- + 1 | 2 + 2 | 3 + 3 | 4 +(3 rows) + +explain (verbose, costs off) +select generate_series(1,3)+1 order by generate_series(1,3); + QUERY PLAN +------------------------------------------------------------------------ + Sort + Output: (((generate_series(1, 3)) + 1)), (generate_series(1, 3)) + Sort Key: (generate_series(1, 3)) + -> Result + Output: ((generate_series(1, 3)) + 1), (generate_series(1, 3)) + -> ProjectSet + Output: generate_series(1, 3) + -> Result +(8 rows) + +select generate_series(1,3)+1 order by generate_series(1,3); + ?column? +---------- + 2 + 3 + 4 +(3 rows) + +-- Check that SRFs of same nesting level run in lockstep +explain (verbose, costs off) +select generate_series(1,3) as x, generate_series(3,6) + 1 as y; + QUERY PLAN +------------------------------------------------------------------ + Result + Output: (generate_series(1, 3)), ((generate_series(3, 6)) + 1) + -> ProjectSet + Output: generate_series(1, 3), generate_series(3, 6) + -> Result +(5 rows) + +select generate_series(1,3) as x, generate_series(3,6) + 1 as y; + x | y +---+--- + 1 | 4 + 2 | 5 + 3 | 6 + | 7 +(4 rows) + +-- Clean up +DROP TABLE few; +DROP TABLE fewmore; |