Avoid making commutatively-duplicate clauses in EquivalenceClasses.
When we decide we need to make a derived clause equating a.x and b.y, we already will re-use a previously-made clause "a.x = b.y". But we might instead have "b.y = a.x", which is perfectly usable because equivclass.c has never promised anything about the operand order in clauses it builds. Saving construction of a new RestrictInfo doesn't matter all that much in itself --- but because we cache selectivity estimates and so on per-RestrictInfo, there's a possibility of saving a fair amount of duplicative effort downstream. Hence, check for commutative matches as well as direct ones when seeing if we have a pre-existing clause. This changes the visible clause order in several regression test cases, but they're all clearly-insignificant changes. Checking for the reverse operand order is simple enough, but if we wanted to check for operator OID match we'd need to call get_commutator here, which is not so cheap. I concluded that we don't really need the operator check anyway, so I just removed it. It's unlikely that an opfamily contains more than one applicable operator for a given pair of operand datatypes; and if it does they had better give the same answers, so there seems little need to insist that we use exactly the one select_equality_operator chose. Using the current core regression suite as a test case, I see this change reducing the number of new join clauses built by create_join_clause from 9673 to 5142 (out of 26652 calls). So not quite 50% savings, but pretty close to it. Discussion: https://postgr.es/m/78062.1666735746@sss.pgh.pa.us
This commit is contained in:
Tom Lane
parent
4ab8c81bd9
commit
a5fc46414d
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@ -526,7 +526,7 @@ EXPLAIN (VERBOSE, COSTS OFF)
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-> Foreign Scan
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Output: t3.c1
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Relations: (public.ft1 t2) INNER JOIN (public.ft2 t3)
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Remote SQL: SELECT r3."C 1" FROM ("S 1"."T 1" r2 INNER JOIN "S 1"."T 1" r3 ON (((r2."C 1" = r3."C 1")))) ORDER BY r2."C 1" ASC NULLS LAST
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Remote SQL: SELECT r3."C 1" FROM ("S 1"."T 1" r2 INNER JOIN "S 1"."T 1" r3 ON (((r3."C 1" = r2."C 1")))) ORDER BY r2."C 1" ASC NULLS LAST
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-> Index Only Scan using t1_pkey on "S 1"."T 1" t1
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Output: t1."C 1"
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(12 rows)
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@ -740,7 +740,7 @@ EXPLAIN (VERBOSE, COSTS OFF)
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Index Cond: (a."C 1" = 47)
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-> Foreign Scan on public.ft2 b
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Output: b.c1, b.c2, b.c3, b.c4, b.c5, b.c6, b.c7, b.c8
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Remote SQL: SELECT "C 1", c2, c3, c4, c5, c6, c7, c8 FROM "S 1"."T 1" WHERE (($1::integer = "C 1"))
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Remote SQL: SELECT "C 1", c2, c3, c4, c5, c6, c7, c8 FROM "S 1"."T 1" WHERE (("C 1" = $1::integer))
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(8 rows)
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SELECT * FROM ft2 a, ft2 b WHERE a.c1 = 47 AND b.c1 = a.c2;
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@ -763,7 +763,7 @@ EXPLAIN (VERBOSE, COSTS OFF)
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Remote SQL: SELECT "C 1", c2, c3, c4, c5, c6, c7, c8 FROM "S 1"."T 1" WHERE ((c2 = 6))
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-> Foreign Scan on public.ft2 b
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Output: b.c1, b.c2, b.c3, b.c4, b.c5, b.c6, b.c7, b.c8
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Filter: (upper((a.c7)::text) = (b.c7)::text)
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Filter: ((b.c7)::text = upper((a.c7)::text))
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Remote SQL: SELECT "C 1", c2, c3, c4, c5, c6, c7, c8 FROM "S 1"."T 1" WHERE (($1::integer = "C 1"))
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(10 rows)
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@ -1220,7 +1220,7 @@ SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t
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Foreign Scan
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Output: t1.c1, t2.c1, t1.c3
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Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2)
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Remote SQL: SELECT r1."C 1", r2."C 1", r1.c3 FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r1."C 1" = r2."C 1")))) ORDER BY r1.c3 ASC NULLS LAST, r1."C 1" ASC NULLS LAST LIMIT 10::bigint OFFSET 100::bigint
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Remote SQL: SELECT r1."C 1", r2."C 1", r1.c3 FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r2."C 1" = r1."C 1")))) ORDER BY r1.c3 ASC NULLS LAST, r1."C 1" ASC NULLS LAST LIMIT 10::bigint OFFSET 100::bigint
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(4 rows)
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SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10;
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@ -1246,7 +1246,7 @@ SELECT t1.c1, t2.c2, t3.c3 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) JOIN ft4 t
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Foreign Scan
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Output: t1.c1, t2.c2, t3.c3, t1.c3
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Relations: ((public.ft1 t1) INNER JOIN (public.ft2 t2)) INNER JOIN (public.ft4 t3)
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Remote SQL: SELECT r1."C 1", r2.c2, r4.c3, r1.c3 FROM (("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r1."C 1" = r2."C 1")))) INNER JOIN "S 1"."T 3" r4 ON (((r1."C 1" = r4.c1)))) ORDER BY r1.c3 ASC NULLS LAST, r1."C 1" ASC NULLS LAST LIMIT 10::bigint OFFSET 10::bigint
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Remote SQL: SELECT r1."C 1", r2.c2, r4.c3, r1.c3 FROM (("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r2."C 1" = r1."C 1")))) INNER JOIN "S 1"."T 3" r4 ON (((r1."C 1" = r4.c1)))) ORDER BY r1.c3 ASC NULLS LAST, r1."C 1" ASC NULLS LAST LIMIT 10::bigint OFFSET 10::bigint
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(4 rows)
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SELECT t1.c1, t2.c2, t3.c3 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) JOIN ft4 t3 ON (t3.c1 = t1.c1) ORDER BY t1.c3, t1.c1 OFFSET 10 LIMIT 10;
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@ -1861,7 +1861,7 @@ SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t
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Foreign Scan
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Output: t1.c1, t2.c1, t1.c3, t1.*, t2.*
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Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2)
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Remote SQL: SELECT r1."C 1", r2."C 1", r1.c3, CASE WHEN (r1.*)::text IS NOT NULL THEN ROW(r1."C 1", r1.c2, r1.c3, r1.c4, r1.c5, r1.c6, r1.c7, r1.c8) END, CASE WHEN (r2.*)::text IS NOT NULL THEN ROW(r2."C 1", r2.c2, r2.c3, r2.c4, r2.c5, r2.c6, r2.c7, r2.c8) END FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r1."C 1" = r2."C 1")))) ORDER BY r1.c3 ASC NULLS LAST, r1."C 1" ASC NULLS LAST LIMIT 10::bigint OFFSET 100::bigint FOR UPDATE OF r1
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Remote SQL: SELECT r1."C 1", r2."C 1", r1.c3, CASE WHEN (r1.*)::text IS NOT NULL THEN ROW(r1."C 1", r1.c2, r1.c3, r1.c4, r1.c5, r1.c6, r1.c7, r1.c8) END, CASE WHEN (r2.*)::text IS NOT NULL THEN ROW(r2."C 1", r2.c2, r2.c3, r2.c4, r2.c5, r2.c6, r2.c7, r2.c8) END FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r2."C 1" = r1."C 1")))) ORDER BY r1.c3 ASC NULLS LAST, r1."C 1" ASC NULLS LAST LIMIT 10::bigint OFFSET 100::bigint FOR UPDATE OF r1
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(4 rows)
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SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10 FOR UPDATE OF t1;
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@ -1886,7 +1886,7 @@ SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t
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Foreign Scan
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Output: t1.c1, t2.c1, t1.c3, t1.*, t2.*
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Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2)
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Remote SQL: SELECT r1."C 1", r2."C 1", r1.c3, CASE WHEN (r1.*)::text IS NOT NULL THEN ROW(r1."C 1", r1.c2, r1.c3, r1.c4, r1.c5, r1.c6, r1.c7, r1.c8) END, CASE WHEN (r2.*)::text IS NOT NULL THEN ROW(r2."C 1", r2.c2, r2.c3, r2.c4, r2.c5, r2.c6, r2.c7, r2.c8) END FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r1."C 1" = r2."C 1")))) ORDER BY r1.c3 ASC NULLS LAST, r1."C 1" ASC NULLS LAST LIMIT 10::bigint OFFSET 100::bigint FOR UPDATE OF r1 FOR UPDATE OF r2
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Remote SQL: SELECT r1."C 1", r2."C 1", r1.c3, CASE WHEN (r1.*)::text IS NOT NULL THEN ROW(r1."C 1", r1.c2, r1.c3, r1.c4, r1.c5, r1.c6, r1.c7, r1.c8) END, CASE WHEN (r2.*)::text IS NOT NULL THEN ROW(r2."C 1", r2.c2, r2.c3, r2.c4, r2.c5, r2.c6, r2.c7, r2.c8) END FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r2."C 1" = r1."C 1")))) ORDER BY r1.c3 ASC NULLS LAST, r1."C 1" ASC NULLS LAST LIMIT 10::bigint OFFSET 100::bigint FOR UPDATE OF r1 FOR UPDATE OF r2
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(4 rows)
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SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10 FOR UPDATE;
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@ -1912,7 +1912,7 @@ SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t
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Foreign Scan
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Output: t1.c1, t2.c1, t1.c3, t1.*, t2.*
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Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2)
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Remote SQL: SELECT r1."C 1", r2."C 1", r1.c3, CASE WHEN (r1.*)::text IS NOT NULL THEN ROW(r1."C 1", r1.c2, r1.c3, r1.c4, r1.c5, r1.c6, r1.c7, r1.c8) END, CASE WHEN (r2.*)::text IS NOT NULL THEN ROW(r2."C 1", r2.c2, r2.c3, r2.c4, r2.c5, r2.c6, r2.c7, r2.c8) END FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r1."C 1" = r2."C 1")))) ORDER BY r1.c3 ASC NULLS LAST, r1."C 1" ASC NULLS LAST LIMIT 10::bigint OFFSET 100::bigint FOR SHARE OF r1
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Remote SQL: SELECT r1."C 1", r2."C 1", r1.c3, CASE WHEN (r1.*)::text IS NOT NULL THEN ROW(r1."C 1", r1.c2, r1.c3, r1.c4, r1.c5, r1.c6, r1.c7, r1.c8) END, CASE WHEN (r2.*)::text IS NOT NULL THEN ROW(r2."C 1", r2.c2, r2.c3, r2.c4, r2.c5, r2.c6, r2.c7, r2.c8) END FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r2."C 1" = r1."C 1")))) ORDER BY r1.c3 ASC NULLS LAST, r1."C 1" ASC NULLS LAST LIMIT 10::bigint OFFSET 100::bigint FOR SHARE OF r1
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(4 rows)
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SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10 FOR SHARE OF t1;
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@ -1937,7 +1937,7 @@ SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t
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Foreign Scan
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Output: t1.c1, t2.c1, t1.c3, t1.*, t2.*
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Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2)
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Remote SQL: SELECT r1."C 1", r2."C 1", r1.c3, CASE WHEN (r1.*)::text IS NOT NULL THEN ROW(r1."C 1", r1.c2, r1.c3, r1.c4, r1.c5, r1.c6, r1.c7, r1.c8) END, CASE WHEN (r2.*)::text IS NOT NULL THEN ROW(r2."C 1", r2.c2, r2.c3, r2.c4, r2.c5, r2.c6, r2.c7, r2.c8) END FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r1."C 1" = r2."C 1")))) ORDER BY r1.c3 ASC NULLS LAST, r1."C 1" ASC NULLS LAST LIMIT 10::bigint OFFSET 100::bigint FOR SHARE OF r1 FOR SHARE OF r2
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Remote SQL: SELECT r1."C 1", r2."C 1", r1.c3, CASE WHEN (r1.*)::text IS NOT NULL THEN ROW(r1."C 1", r1.c2, r1.c3, r1.c4, r1.c5, r1.c6, r1.c7, r1.c8) END, CASE WHEN (r2.*)::text IS NOT NULL THEN ROW(r2."C 1", r2.c2, r2.c3, r2.c4, r2.c5, r2.c6, r2.c7, r2.c8) END FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r2."C 1" = r1."C 1")))) ORDER BY r1.c3 ASC NULLS LAST, r1."C 1" ASC NULLS LAST LIMIT 10::bigint OFFSET 100::bigint FOR SHARE OF r1 FOR SHARE OF r2
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(4 rows)
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SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10 FOR SHARE;
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@ -1966,7 +1966,7 @@ WITH t (c1_1, c1_3, c2_1) AS MATERIALIZED (SELECT t1.c1, t1.c3, t2.c1 FROM ft1 t
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-> Foreign Scan
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Output: t1.c1, t1.c3, t2.c1
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Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2)
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Remote SQL: SELECT r1."C 1", r1.c3, r2."C 1" FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r1."C 1" = r2."C 1"))))
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Remote SQL: SELECT r1."C 1", r1.c3, r2."C 1" FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r2."C 1" = r1."C 1"))))
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-> Sort
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Output: t.c1_1, t.c2_1, t.c1_3
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Sort Key: t.c1_3, t.c1_1
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@ -1997,7 +1997,7 @@ SELECT t1.ctid, t1, t2, t1.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER B
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Foreign Scan
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Output: t1.ctid, t1.*, t2.*, t1.c1, t1.c3
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Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2)
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Remote SQL: SELECT r1.ctid, CASE WHEN (r1.*)::text IS NOT NULL THEN ROW(r1."C 1", r1.c2, r1.c3, r1.c4, r1.c5, r1.c6, r1.c7, r1.c8) END, CASE WHEN (r2.*)::text IS NOT NULL THEN ROW(r2."C 1", r2.c2, r2.c3, r2.c4, r2.c5, r2.c6, r2.c7, r2.c8) END, r1."C 1", r1.c3 FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r1."C 1" = r2."C 1")))) ORDER BY r1.c3 ASC NULLS LAST, r1."C 1" ASC NULLS LAST LIMIT 10::bigint OFFSET 100::bigint
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Remote SQL: SELECT r1.ctid, CASE WHEN (r1.*)::text IS NOT NULL THEN ROW(r1."C 1", r1.c2, r1.c3, r1.c4, r1.c5, r1.c6, r1.c7, r1.c8) END, CASE WHEN (r2.*)::text IS NOT NULL THEN ROW(r2."C 1", r2.c2, r2.c3, r2.c4, r2.c5, r2.c6, r2.c7, r2.c8) END, r1."C 1", r1.c3 FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r2."C 1" = r1."C 1")))) ORDER BY r1.c3 ASC NULLS LAST, r1."C 1" ASC NULLS LAST LIMIT 10::bigint OFFSET 100::bigint
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(4 rows)
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-- SEMI JOIN, not pushed down
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@ -2216,7 +2216,7 @@ SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) WHERE t1.c8 = t2.
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Output: t1.c1, t2.c1, t1.c3
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Filter: (t1.c8 = t2.c8)
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Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2)
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Remote SQL: SELECT r1."C 1", r2."C 1", r1.c3, r1.c8, r2.c8 FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r1."C 1" = r2."C 1"))))
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Remote SQL: SELECT r1."C 1", r2."C 1", r1.c3, r1.c8, r2.c8 FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r2."C 1" = r1."C 1"))))
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(10 rows)
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SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) WHERE t1.c8 = t2.c8 ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10;
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-> Foreign Scan
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Output: t1.c1, t2.c1
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Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2)
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Remote SQL: SELECT r1."C 1", r2."C 1" FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r1."C 1" = r2."C 1"))))
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Remote SQL: SELECT r1."C 1", r2."C 1" FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r2."C 1" = r1."C 1"))))
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-> Foreign Scan
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Output: t1_1.c1, t2_1.c1
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Relations: (public.ft1 t1_1) INNER JOIN (public.ft2 t2_1)
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Remote SQL: SELECT r1."C 1", r2."C 1" FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r1."C 1" = r2."C 1"))))
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Remote SQL: SELECT r1."C 1", r2."C 1" FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r2."C 1" = r1."C 1"))))
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(20 rows)
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SELECT t1c1, avg(t1c1 + t2c1) FROM (SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) UNION SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1)) AS t (t1c1, t2c1) GROUP BY t1c1 ORDER BY t1c1 OFFSET 100 LIMIT 10;
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-> Foreign Scan
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Output: t2.c1, t3.c1
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Relations: (public.ft1 t2) INNER JOIN (public.ft2 t3)
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Remote SQL: SELECT r1."C 1", r2."C 1" FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r1."C 1" = r2."C 1")) AND ((r1.c2 = $1::integer))))
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Remote SQL: SELECT r1."C 1", r2."C 1" FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r2."C 1" = r1."C 1")) AND ((r1.c2 = $1::integer))))
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(17 rows)
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SELECT t1."C 1" FROM "S 1"."T 1" t1, LATERAL (SELECT DISTINCT t2.c1, t3.c1 FROM ft1 t2, ft2 t3 WHERE t2.c1 = t3.c1 AND t2.c2 = t1.c2) q ORDER BY t1."C 1" OFFSET 10 LIMIT 10;
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-> Foreign Scan
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Output: ft1.c1, ft1.c2, ft1.c3, ft1.c4, ft1.c5, ft1.c6, ft1.c7, ft1.c8, ft1.*, ft2.c1, ft2.c2, ft2.c3, ft2.c4, ft2.c5, ft2.c6, ft2.c7, ft2.c8, ft2.*, ft4.c1, ft4.c2, ft4.c3, ft4.*, ft5.c1, ft5.c2, ft5.c3, ft5.*
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Relations: (((public.ft1) INNER JOIN (public.ft2)) INNER JOIN (public.ft4)) INNER JOIN (public.ft5)
|
||||
Remote SQL: SELECT r1."C 1", r1.c2, r1.c3, r1.c4, r1.c5, r1.c6, r1.c7, r1.c8, CASE WHEN (r1.*)::text IS NOT NULL THEN ROW(r1."C 1", r1.c2, r1.c3, r1.c4, r1.c5, r1.c6, r1.c7, r1.c8) END, r2."C 1", r2.c2, r2.c3, r2.c4, r2.c5, r2.c6, r2.c7, r2.c8, CASE WHEN (r2.*)::text IS NOT NULL THEN ROW(r2."C 1", r2.c2, r2.c3, r2.c4, r2.c5, r2.c6, r2.c7, r2.c8) END, r3.c1, r3.c2, r3.c3, CASE WHEN (r3.*)::text IS NOT NULL THEN ROW(r3.c1, r3.c2, r3.c3) END, r4.c1, r4.c2, r4.c3, CASE WHEN (r4.*)::text IS NOT NULL THEN ROW(r4.c1, r4.c2, r4.c3) END FROM ((("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r1."C 1" = r2."C 1")) AND ((r2."C 1" < 100)) AND ((r1."C 1" < 100)))) INNER JOIN "S 1"."T 3" r3 ON (((r1.c2 = r3.c1)))) INNER JOIN "S 1"."T 4" r4 ON (((r1.c2 = r4.c1)))) ORDER BY r1.c2 ASC NULLS LAST FOR UPDATE OF r1 FOR UPDATE OF r2 FOR UPDATE OF r3 FOR UPDATE OF r4
|
||||
Remote SQL: SELECT r1."C 1", r1.c2, r1.c3, r1.c4, r1.c5, r1.c6, r1.c7, r1.c8, CASE WHEN (r1.*)::text IS NOT NULL THEN ROW(r1."C 1", r1.c2, r1.c3, r1.c4, r1.c5, r1.c6, r1.c7, r1.c8) END, r2."C 1", r2.c2, r2.c3, r2.c4, r2.c5, r2.c6, r2.c7, r2.c8, CASE WHEN (r2.*)::text IS NOT NULL THEN ROW(r2."C 1", r2.c2, r2.c3, r2.c4, r2.c5, r2.c6, r2.c7, r2.c8) END, r3.c1, r3.c2, r3.c3, CASE WHEN (r3.*)::text IS NOT NULL THEN ROW(r3.c1, r3.c2, r3.c3) END, r4.c1, r4.c2, r4.c3, CASE WHEN (r4.*)::text IS NOT NULL THEN ROW(r4.c1, r4.c2, r4.c3) END FROM ((("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r2."C 1" = r1."C 1")) AND ((r2."C 1" < 100)) AND ((r1."C 1" < 100)))) INNER JOIN "S 1"."T 3" r3 ON (((r1.c2 = r3.c1)))) INNER JOIN "S 1"."T 4" r4 ON (((r1.c2 = r4.c1)))) ORDER BY r1.c2 ASC NULLS LAST FOR UPDATE OF r1 FOR UPDATE OF r2 FOR UPDATE OF r3 FOR UPDATE OF r4
|
||||
-> Merge Join
|
||||
Output: ft1.c1, ft1.c2, ft1.c3, ft1.c4, ft1.c5, ft1.c6, ft1.c7, ft1.c8, ft1.*, ft2.c1, ft2.c2, ft2.c3, ft2.c4, ft2.c5, ft2.c6, ft2.c7, ft2.c8, ft2.*, ft4.c1, ft4.c2, ft4.c3, ft4.*, ft5.c1, ft5.c2, ft5.c3, ft5.*
|
||||
Merge Cond: (ft1.c2 = ft5.c1)
|
||||
|
|
@ -2491,7 +2491,7 @@ SELECT * FROM local_tbl LEFT JOIN (SELECT ft1.*, COALESCE(ft1.c3 || ft2.c3, 'foo
|
|||
-> Foreign Scan
|
||||
Output: ft1.c1, ft1.c2, ft1.c3, ft1.c4, ft1.c5, ft1.c6, ft1.c7, ft1.c8, ft1.*, ft2.*, COALESCE((ft1.c3 || ft2.c3), 'foobar'::text)
|
||||
Relations: (public.ft1) INNER JOIN (public.ft2)
|
||||
Remote SQL: SELECT r4."C 1", r4.c2, r4.c3, r4.c4, r4.c5, r4.c6, r4.c7, r4.c8, CASE WHEN (r4.*)::text IS NOT NULL THEN ROW(r4."C 1", r4.c2, r4.c3, r4.c4, r4.c5, r4.c6, r4.c7, r4.c8) END, CASE WHEN (r5.*)::text IS NOT NULL THEN ROW(r5."C 1", r5.c2, r5.c3, r5.c4, r5.c5, r5.c6, r5.c7, r5.c8) END, r5.c3 FROM ("S 1"."T 1" r4 INNER JOIN "S 1"."T 1" r5 ON (((r4."C 1" = r5."C 1")) AND ((r4."C 1" < 100)))) ORDER BY r4."C 1" ASC NULLS LAST
|
||||
Remote SQL: SELECT r4."C 1", r4.c2, r4.c3, r4.c4, r4.c5, r4.c6, r4.c7, r4.c8, CASE WHEN (r4.*)::text IS NOT NULL THEN ROW(r4."C 1", r4.c2, r4.c3, r4.c4, r4.c5, r4.c6, r4.c7, r4.c8) END, CASE WHEN (r5.*)::text IS NOT NULL THEN ROW(r5."C 1", r5.c2, r5.c3, r5.c4, r5.c5, r5.c6, r5.c7, r5.c8) END, r5.c3 FROM ("S 1"."T 1" r4 INNER JOIN "S 1"."T 1" r5 ON (((r5."C 1" = r4."C 1")) AND ((r4."C 1" < 100)))) ORDER BY r4."C 1" ASC NULLS LAST
|
||||
-> Result
|
||||
Output: ft1.c1, ft1.c2, ft1.c3, ft1.c4, ft1.c5, ft1.c6, ft1.c7, ft1.c8, ft1.*, ft2.*, ft2.c3
|
||||
-> Sort
|
||||
|
|
@ -2529,7 +2529,7 @@ SELECT * FROM local_tbl LEFT JOIN (SELECT ft1.* FROM ft1 INNER JOIN ft2 ON (ft1.
|
|||
Output: ft1.c1, ft1.c2, ft1.c3, ft1.c4, ft1.c5, ft1.c6, ft1.c7, ft1.c8, ft1.*, ft2.*
|
||||
Filter: (ft1.c1 = postgres_fdw_abs(ft2.c2))
|
||||
Relations: (public.ft1) INNER JOIN (public.ft2)
|
||||
Remote SQL: SELECT r4."C 1", r4.c2, r4.c3, r4.c4, r4.c5, r4.c6, r4.c7, r4.c8, CASE WHEN (r4.*)::text IS NOT NULL THEN ROW(r4."C 1", r4.c2, r4.c3, r4.c4, r4.c5, r4.c6, r4.c7, r4.c8) END, CASE WHEN (r5.*)::text IS NOT NULL THEN ROW(r5."C 1", r5.c2, r5.c3, r5.c4, r5.c5, r5.c6, r5.c7, r5.c8) END, r5.c2 FROM ("S 1"."T 1" r4 INNER JOIN "S 1"."T 1" r5 ON (((r4."C 1" = r5."C 1")) AND ((r4."C 1" < 100)))) ORDER BY r4.c3 ASC NULLS LAST
|
||||
Remote SQL: SELECT r4."C 1", r4.c2, r4.c3, r4.c4, r4.c5, r4.c6, r4.c7, r4.c8, CASE WHEN (r4.*)::text IS NOT NULL THEN ROW(r4."C 1", r4.c2, r4.c3, r4.c4, r4.c5, r4.c6, r4.c7, r4.c8) END, CASE WHEN (r5.*)::text IS NOT NULL THEN ROW(r5."C 1", r5.c2, r5.c3, r5.c4, r5.c5, r5.c6, r5.c7, r5.c8) END, r5.c2 FROM ("S 1"."T 1" r4 INNER JOIN "S 1"."T 1" r5 ON (((r5."C 1" = r4."C 1")) AND ((r4."C 1" < 100)))) ORDER BY r4.c3 ASC NULLS LAST
|
||||
-> Sort
|
||||
Output: ft1.c1, ft1.c2, ft1.c3, ft1.c4, ft1.c5, ft1.c6, ft1.c7, ft1.c8, ft1.*, ft2.*, ft2.c2
|
||||
Sort Key: ft1.c3
|
||||
|
|
@ -2771,7 +2771,7 @@ select sum(t1.c1), count(t2.c1) from ft1 t1 inner join ft2 t2 on (t1.c1 = t2.c1)
|
|||
Output: t1.c1, t2.c1
|
||||
Filter: (((((t1.c1 * t2.c1) / (t1.c1 * t2.c1)))::double precision * random()) <= '1'::double precision)
|
||||
Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2)
|
||||
Remote SQL: SELECT r1."C 1", r2."C 1" FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r1."C 1" = r2."C 1"))))
|
||||
Remote SQL: SELECT r1."C 1", r2."C 1" FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r2."C 1" = r1."C 1"))))
|
||||
(7 rows)
|
||||
|
||||
-- GROUP BY clause having expressions
|
||||
|
|
@ -3973,7 +3973,7 @@ EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st2(10, 20);
|
|||
Sort Key: t1.c1
|
||||
-> Nested Loop Semi Join
|
||||
Output: t1.c1, t1.c2, t1.c3, t1.c4, t1.c5, t1.c6, t1.c7, t1.c8
|
||||
Join Filter: (t1.c3 = t2.c3)
|
||||
Join Filter: (t2.c3 = t1.c3)
|
||||
-> Foreign Scan on public.ft1 t1
|
||||
Output: t1.c1, t1.c2, t1.c3, t1.c4, t1.c5, t1.c6, t1.c7, t1.c8
|
||||
Remote SQL: SELECT "C 1", c2, c3, c4, c5, c6, c7, c8 FROM "S 1"."T 1" WHERE (("C 1" < 20))
|
||||
|
|
@ -4007,7 +4007,7 @@ EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st3(10, 20);
|
|||
Sort Key: t1.c1
|
||||
-> Nested Loop Semi Join
|
||||
Output: t1.c1, t1.c2, t1.c3, t1.c4, t1.c5, t1.c6, t1.c7, t1.c8
|
||||
Join Filter: (t1.c3 = t2.c3)
|
||||
Join Filter: (t2.c3 = t1.c3)
|
||||
-> Foreign Scan on public.ft1 t1
|
||||
Output: t1.c1, t1.c2, t1.c3, t1.c4, t1.c5, t1.c6, t1.c7, t1.c8
|
||||
Remote SQL: SELECT "C 1", c2, c3, c4, c5, c6, c7, c8 FROM "S 1"."T 1" WHERE (("C 1" < 20))
|
||||
|
|
@ -4502,7 +4502,7 @@ explain (verbose, costs off) select * from ft3 f, loct3 l
|
|||
Index Cond: (l.f1 = 'foo'::text)
|
||||
-> Foreign Scan on public.ft3 f
|
||||
Output: f.f1, f.f2, f.f3
|
||||
Remote SQL: SELECT f1, f2, f3 FROM public.loct3 WHERE (($1::character varying(10) = f3))
|
||||
Remote SQL: SELECT f1, f2, f3 FROM public.loct3 WHERE ((f3 = $1::character varying(10)))
|
||||
(8 rows)
|
||||
|
||||
-- can't be sent to remote
|
||||
|
|
@ -10899,13 +10899,13 @@ SELECT * FROM local_tbl, async_pt WHERE local_tbl.a = async_pt.a AND local_tbl.c
|
|||
-> Append
|
||||
-> Async Foreign Scan on public.async_p1 async_pt_1
|
||||
Output: async_pt_1.a, async_pt_1.b, async_pt_1.c
|
||||
Remote SQL: SELECT a, b, c FROM public.base_tbl1 WHERE (($1::integer = a))
|
||||
Remote SQL: SELECT a, b, c FROM public.base_tbl1 WHERE ((a = $1::integer))
|
||||
-> Async Foreign Scan on public.async_p2 async_pt_2
|
||||
Output: async_pt_2.a, async_pt_2.b, async_pt_2.c
|
||||
Remote SQL: SELECT a, b, c FROM public.base_tbl2 WHERE (($1::integer = a))
|
||||
Remote SQL: SELECT a, b, c FROM public.base_tbl2 WHERE ((a = $1::integer))
|
||||
-> Seq Scan on public.async_p3 async_pt_3
|
||||
Output: async_pt_3.a, async_pt_3.b, async_pt_3.c
|
||||
Filter: (local_tbl.a = async_pt_3.a)
|
||||
Filter: (async_pt_3.a = local_tbl.a)
|
||||
(15 rows)
|
||||
|
||||
EXPLAIN (ANALYZE, COSTS OFF, SUMMARY OFF, TIMING OFF)
|
||||
|
|
@ -10920,7 +10920,7 @@ SELECT * FROM local_tbl, async_pt WHERE local_tbl.a = async_pt.a AND local_tbl.c
|
|||
-> Async Foreign Scan on async_p1 async_pt_1 (never executed)
|
||||
-> Async Foreign Scan on async_p2 async_pt_2 (actual rows=1 loops=1)
|
||||
-> Seq Scan on async_p3 async_pt_3 (never executed)
|
||||
Filter: (local_tbl.a = a)
|
||||
Filter: (a = local_tbl.a)
|
||||
(9 rows)
|
||||
|
||||
SELECT * FROM local_tbl, async_pt WHERE local_tbl.a = async_pt.a AND local_tbl.c = 'bar';
|
||||
|
|
|
|||
|
|
@ -1382,7 +1382,9 @@ generate_base_implied_equalities_broken(PlannerInfo *root,
|
|||
* whenever we select a particular pair of EquivalenceMembers to join,
|
||||
* we check to see if the pair matches any original clause (in ec_sources)
|
||||
* or previously-built clause (in ec_derives). This saves memory and allows
|
||||
* re-use of information cached in RestrictInfos.
|
||||
* re-use of information cached in RestrictInfos. We also avoid generating
|
||||
* commutative duplicates, i.e. if the algorithm selects "a.x = b.y" but
|
||||
* we already have "b.y = a.x", we return the existing clause.
|
||||
*
|
||||
* join_relids should always equal bms_union(outer_relids, inner_rel->relids).
|
||||
* We could simplify this function's API by computing it internally, but in
|
||||
|
|
@ -1790,7 +1792,8 @@ select_equality_operator(EquivalenceClass *ec, Oid lefttype, Oid righttype)
|
|||
/*
|
||||
* create_join_clause
|
||||
* Find or make a RestrictInfo comparing the two given EC members
|
||||
* with the given operator.
|
||||
* with the given operator (or, possibly, its commutator, because
|
||||
* the ordering of the operands in the result is not guaranteed).
|
||||
*
|
||||
* parent_ec is either equal to ec (if the clause is a potentially-redundant
|
||||
* join clause) or NULL (if not). We have to treat this as part of the
|
||||
|
|
@ -1811,16 +1814,22 @@ create_join_clause(PlannerInfo *root,
|
|||
/*
|
||||
* Search to see if we already built a RestrictInfo for this pair of
|
||||
* EquivalenceMembers. We can use either original source clauses or
|
||||
* previously-derived clauses. The check on opno is probably redundant,
|
||||
* but be safe ...
|
||||
* previously-derived clauses, and a commutator clause is acceptable.
|
||||
*
|
||||
* We used to verify that opno matches, but that seems redundant: even if
|
||||
* it's not identical, it'd better have the same effects, or the operator
|
||||
* families we're using are broken.
|
||||
*/
|
||||
foreach(lc, ec->ec_sources)
|
||||
{
|
||||
rinfo = (RestrictInfo *) lfirst(lc);
|
||||
if (rinfo->left_em == leftem &&
|
||||
rinfo->right_em == rightem &&
|
||||
rinfo->parent_ec == parent_ec &&
|
||||
opno == ((OpExpr *) rinfo->clause)->opno)
|
||||
rinfo->parent_ec == parent_ec)
|
||||
return rinfo;
|
||||
if (rinfo->left_em == rightem &&
|
||||
rinfo->right_em == leftem &&
|
||||
rinfo->parent_ec == parent_ec)
|
||||
return rinfo;
|
||||
}
|
||||
|
||||
|
|
@ -1829,8 +1838,11 @@ create_join_clause(PlannerInfo *root,
|
|||
rinfo = (RestrictInfo *) lfirst(lc);
|
||||
if (rinfo->left_em == leftem &&
|
||||
rinfo->right_em == rightem &&
|
||||
rinfo->parent_ec == parent_ec &&
|
||||
opno == ((OpExpr *) rinfo->clause)->opno)
|
||||
rinfo->parent_ec == parent_ec)
|
||||
return rinfo;
|
||||
if (rinfo->left_em == rightem &&
|
||||
rinfo->right_em == leftem &&
|
||||
rinfo->parent_ec == parent_ec)
|
||||
return rinfo;
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -3149,7 +3149,7 @@ where i41.f1 > 0;
|
|||
-> Seq Scan on int4_tbl i41
|
||||
Filter: (f1 > 0)
|
||||
-> Nested Loop
|
||||
Join Filter: (i41.f1 = i42.f1)
|
||||
Join Filter: (i42.f1 = i41.f1)
|
||||
-> Seq Scan on int8_tbl i81
|
||||
-> Materialize
|
||||
-> Seq Scan on int4_tbl i42
|
||||
|
|
@ -4871,7 +4871,7 @@ where ss.stringu2 !~* ss.case1;
|
|||
QUERY PLAN
|
||||
--------------------------------------------------------------------------------------------
|
||||
Nested Loop
|
||||
Join Filter: (CASE t1.ten WHEN 0 THEN 'doh!'::text ELSE NULL::text END = t0.f1)
|
||||
Join Filter: (t0.f1 = CASE t1.ten WHEN 0 THEN 'doh!'::text ELSE NULL::text END)
|
||||
-> Nested Loop
|
||||
-> Seq Scan on int4_tbl i4
|
||||
-> Index Scan using tenk1_unique2 on tenk1 t1
|
||||
|
|
@ -6533,7 +6533,7 @@ where j1.id1 % 1000 = 1 and j2.id1 % 1000 = 1;
|
|||
-----------------------------------------
|
||||
Merge Join
|
||||
Merge Cond: (j1.id1 = j2.id1)
|
||||
Join Filter: (j1.id2 = j2.id2)
|
||||
Join Filter: (j2.id2 = j1.id2)
|
||||
-> Index Scan using j1_id1_idx on j1
|
||||
-> Index Scan using j2_id1_idx on j2
|
||||
(5 rows)
|
||||
|
|
@ -6555,7 +6555,7 @@ where j1.id1 % 1000 = 1 and j2.id1 % 1000 = 1 and j2.id1 = any (array[1]);
|
|||
----------------------------------------------------
|
||||
Merge Join
|
||||
Merge Cond: (j1.id1 = j2.id1)
|
||||
Join Filter: (j1.id2 = j2.id2)
|
||||
Join Filter: (j2.id2 = j1.id2)
|
||||
-> Index Scan using j1_id1_idx on j1
|
||||
-> Index Scan using j2_id1_idx on j2
|
||||
Index Cond: (id1 = ANY ('{1}'::integer[]))
|
||||
|
|
@ -6578,7 +6578,7 @@ where j1.id1 % 1000 = 1 and j2.id1 % 1000 = 1 and j2.id1 >= any (array[1,5]);
|
|||
-------------------------------------------------------
|
||||
Merge Join
|
||||
Merge Cond: (j1.id1 = j2.id1)
|
||||
Join Filter: (j1.id2 = j2.id2)
|
||||
Join Filter: (j2.id2 = j1.id2)
|
||||
-> Index Scan using j1_id1_idx on j1
|
||||
-> Index Only Scan using j2_pkey on j2
|
||||
Index Cond: (id1 >= ANY ('{1,5}'::integer[]))
|
||||
|
|
|
|||
|
|
@ -304,7 +304,7 @@ SELECT t1.* FROM prt1 t1 WHERE t1.a IN (SELECT t2.b FROM prt2 t2 WHERE t2.a = 0)
|
|||
-> Seq Scan on prt2_p2 t2_2
|
||||
Filter: (a = 0)
|
||||
-> Nested Loop Semi Join
|
||||
Join Filter: (t1_3.a = t2_3.b)
|
||||
Join Filter: (t2_3.b = t1_3.a)
|
||||
-> Seq Scan on prt1_p3 t1_3
|
||||
Filter: (b = 0)
|
||||
-> Materialize
|
||||
|
|
@ -601,7 +601,7 @@ SELECT t1.a, t1.c, t2.b, t2.c, t3.a + t3.b, t3.c FROM prt1 t1, prt2 t2, prt1_e t
|
|||
Sort Key: t1.a
|
||||
-> Append
|
||||
-> Nested Loop
|
||||
Join Filter: (t1_1.a = ((t3_1.a + t3_1.b) / 2))
|
||||
Join Filter: (((t3_1.a + t3_1.b) / 2) = t1_1.a)
|
||||
-> Hash Join
|
||||
Hash Cond: (t2_1.b = t1_1.a)
|
||||
-> Seq Scan on prt2_p1 t2_1
|
||||
|
|
@ -611,7 +611,7 @@ SELECT t1.a, t1.c, t2.b, t2.c, t3.a + t3.b, t3.c FROM prt1 t1, prt2 t2, prt1_e t
|
|||
-> Index Scan using iprt1_e_p1_ab2 on prt1_e_p1 t3_1
|
||||
Index Cond: (((a + b) / 2) = t2_1.b)
|
||||
-> Nested Loop
|
||||
Join Filter: (t1_2.a = ((t3_2.a + t3_2.b) / 2))
|
||||
Join Filter: (((t3_2.a + t3_2.b) / 2) = t1_2.a)
|
||||
-> Hash Join
|
||||
Hash Cond: (t2_2.b = t1_2.a)
|
||||
-> Seq Scan on prt2_p2 t2_2
|
||||
|
|
@ -621,7 +621,7 @@ SELECT t1.a, t1.c, t2.b, t2.c, t3.a + t3.b, t3.c FROM prt1 t1, prt2 t2, prt1_e t
|
|||
-> Index Scan using iprt1_e_p2_ab2 on prt1_e_p2 t3_2
|
||||
Index Cond: (((a + b) / 2) = t2_2.b)
|
||||
-> Nested Loop
|
||||
Join Filter: (t1_3.a = ((t3_3.a + t3_3.b) / 2))
|
||||
Join Filter: (((t3_3.a + t3_3.b) / 2) = t1_3.a)
|
||||
-> Hash Join
|
||||
Hash Cond: (t2_3.b = t1_3.a)
|
||||
-> Seq Scan on prt2_p3 t2_3
|
||||
|
|
@ -926,7 +926,7 @@ SELECT t1.* FROM prt1 t1 WHERE t1.a IN (SELECT t1.b FROM prt2 t1, prt1_e t2 WHER
|
|||
Sort Key: t1.a
|
||||
-> Append
|
||||
-> Nested Loop
|
||||
Join Filter: (t1_2.a = t1_5.b)
|
||||
Join Filter: (t1_5.b = t1_2.a)
|
||||
-> HashAggregate
|
||||
Group Key: t1_5.b
|
||||
-> Hash Join
|
||||
|
|
@ -939,7 +939,7 @@ SELECT t1.* FROM prt1 t1 WHERE t1.a IN (SELECT t1.b FROM prt2 t1, prt1_e t2 WHER
|
|||
Index Cond: (a = ((t2_1.a + t2_1.b) / 2))
|
||||
Filter: (b = 0)
|
||||
-> Nested Loop
|
||||
Join Filter: (t1_3.a = t1_6.b)
|
||||
Join Filter: (t1_6.b = t1_3.a)
|
||||
-> HashAggregate
|
||||
Group Key: t1_6.b
|
||||
-> Hash Join
|
||||
|
|
@ -952,7 +952,7 @@ SELECT t1.* FROM prt1 t1 WHERE t1.a IN (SELECT t1.b FROM prt2 t1, prt1_e t2 WHER
|
|||
Index Cond: (a = ((t2_2.a + t2_2.b) / 2))
|
||||
Filter: (b = 0)
|
||||
-> Nested Loop
|
||||
Join Filter: (t1_4.a = t1_7.b)
|
||||
Join Filter: (t1_7.b = t1_4.a)
|
||||
-> HashAggregate
|
||||
Group Key: t1_7.b
|
||||
-> Nested Loop
|
||||
|
|
|
|||
|
|
@ -119,7 +119,7 @@ FROM tidscan t1 JOIN tidscan t2 ON t1.ctid = t2.ctid WHERE t1.id = 1;
|
|||
-> Seq Scan on tidscan t1
|
||||
Filter: (id = 1)
|
||||
-> Tid Scan on tidscan t2
|
||||
TID Cond: (ctid = t1.ctid)
|
||||
TID Cond: (t1.ctid = ctid)
|
||||
(5 rows)
|
||||
|
||||
SELECT t1.ctid, t1.*, t2.ctid, t2.*
|
||||
|
|
|
|||
Loading…
Reference in New Issue