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Add test for CREATE INDEX CONCURRENTLY with not-so-immutable predicate
83158f7
has improved index_set_state_flags() so as it is possible to use
transactional updates when updating pg_index state flags, but there was
not really a test case which stressed directly the possibility it fixed.
This commit adds such a test, using a predicate that looks valid in
appearance but calls a stable function.
Author: Andrey Lepikhov
Discussion: https://postgr.es/m/9b905019-5297-7372-0ad2-e1a4bb66a719@postgrespro.ru
Backpatch-through: 9.6
This commit is contained in:
parent
acb60edf02
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@ -1393,6 +1393,18 @@ BEGIN;
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CREATE INDEX CONCURRENTLY concur_index7 ON concur_heap(f1);
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ERROR: CREATE INDEX CONCURRENTLY cannot run inside a transaction block
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COMMIT;
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-- test where predicate is able to do a transactional update during
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-- a concurrent build before switching pg_index state flags.
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CREATE FUNCTION predicate_stable() RETURNS bool IMMUTABLE
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LANGUAGE plpgsql AS $$
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BEGIN
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EXECUTE 'SELECT txid_current()';
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RETURN true;
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END; $$;
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CREATE INDEX CONCURRENTLY concur_index8 ON concur_heap (f1)
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WHERE predicate_stable();
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DROP INDEX concur_index8;
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DROP FUNCTION predicate_stable();
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-- But you can do a regular index build in a transaction
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BEGIN;
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CREATE INDEX std_index on concur_heap(f2);
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@ -481,11 +481,22 @@ CREATE INDEX CONCURRENTLY concur_index4 on concur_heap(f2) WHERE f1='a';
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CREATE INDEX CONCURRENTLY concur_index5 on concur_heap(f2) WHERE f1='x';
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-- here we also check that you can default the index name
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CREATE INDEX CONCURRENTLY on concur_heap((f2||f1));
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-- You can't do a concurrent index build in a transaction
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BEGIN;
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CREATE INDEX CONCURRENTLY concur_index7 ON concur_heap(f1);
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COMMIT;
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-- test where predicate is able to do a transactional update during
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-- a concurrent build before switching pg_index state flags.
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CREATE FUNCTION predicate_stable() RETURNS bool IMMUTABLE
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LANGUAGE plpgsql AS $$
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BEGIN
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EXECUTE 'SELECT txid_current()';
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RETURN true;
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END; $$;
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CREATE INDEX CONCURRENTLY concur_index8 ON concur_heap (f1)
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WHERE predicate_stable();
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DROP INDEX concur_index8;
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DROP FUNCTION predicate_stable();
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-- But you can do a regular index build in a transaction
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BEGIN;
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