From 26213367c7208c3cefe9467c6bc0b1399632a8fc Mon Sep 17 00:00:00 2001 From: Paul Guo Date: Wed, 27 Jan 2021 13:06:16 +0800 Subject: [PATCH v2] Freeze the tuples during CTAS. Actually this is the behavior in materialized view code also. With this unncessary vacuum could be avoided. --- src/backend/commands/createas.c | 2 +- src/test/regress/expected/create_index.out | 12 +++++------- 2 files changed, 6 insertions(+), 8 deletions(-) diff --git a/src/backend/commands/createas.c b/src/backend/commands/createas.c index dce882012e..0391699423 100644 --- a/src/backend/commands/createas.c +++ b/src/backend/commands/createas.c @@ -552,7 +552,7 @@ intorel_startup(DestReceiver *self, int operation, TupleDesc typeinfo) myState->rel = intoRelationDesc; myState->reladdr = intoRelationAddr; myState->output_cid = GetCurrentCommandId(true); - myState->ti_options = TABLE_INSERT_SKIP_FSM; + myState->ti_options = TABLE_INSERT_SKIP_FSM | TABLE_INSERT_FROZEN; /* * If WITH NO DATA is specified, there is no need to set up the state for diff --git a/src/test/regress/expected/create_index.out b/src/test/regress/expected/create_index.out index fc6afab58a..63ac9f1425 100644 --- a/src/test/regress/expected/create_index.out +++ b/src/test/regress/expected/create_index.out @@ -1857,14 +1857,12 @@ ANALYZE dupindexcols; EXPLAIN (COSTS OFF) SELECT count(*) FROM dupindexcols WHERE f1 BETWEEN 'WA' AND 'ZZZ' and id < 1000 and f1 ~<~ 'YX'; - QUERY PLAN ----------------------------------------------------------------------------------------------------------------- + QUERY PLAN +---------------------------------------------------------------------------------------------------------- Aggregate - -> Bitmap Heap Scan on dupindexcols - Recheck Cond: ((f1 >= 'WA'::text) AND (f1 <= 'ZZZ'::text) AND (id < 1000) AND (f1 ~<~ 'YX'::text)) - -> Bitmap Index Scan on dupindexcols_i - Index Cond: ((f1 >= 'WA'::text) AND (f1 <= 'ZZZ'::text) AND (id < 1000) AND (f1 ~<~ 'YX'::text)) -(5 rows) + -> Index Only Scan using dupindexcols_i on dupindexcols + Index Cond: ((f1 >= 'WA'::text) AND (f1 <= 'ZZZ'::text) AND (id < 1000) AND (f1 ~<~ 'YX'::text)) +(3 rows) SELECT count(*) FROM dupindexcols WHERE f1 BETWEEN 'WA' AND 'ZZZ' and id < 1000 and f1 ~<~ 'YX'; -- 2.14.3