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a49927f04c
The previous isolation tests did not account for the possibility that the background writer or the checkpointer could write a RUNNING_XACTS record, which could cause logical decoding to produce more logical snapshots than expected. This commit modifies the isolation tests to verify that at least one logical snapshot contains the expected number of committed or ongoing catalog-change transactions. Per buildfarm member skink. Reported-by: Andres Freund <andres@anarazel.de> Author: Bertrand Drouvot <bertranddrouvot.pg@gmail.com> Reviewed-by: Amit Kapila <amit.kapila16@gmail.com> Reviewed-by: Masahiko Sawada <sawada.mshk@gmail.com> Discussion: https://postgr.es/m/5qbxud4pvnvmtuoi7weiizm5hmumxaeohx4vztfhrwlfhyz6rj@buh4435mllwo
33 lines
1.2 KiB
Plaintext
33 lines
1.2 KiB
Plaintext
Parsed test spec with 2 sessions
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starting permutation: s0_init s0_begin s0_savepoint s0_truncate s1_create_table s1_checkpoint s1_get_changes s1_check_snapshot_info s1_check_snapshot_meta s0_commit
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step s0_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
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?column?
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--------
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init
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(1 row)
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step s0_begin: BEGIN;
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step s0_savepoint: SAVEPOINT sp1;
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step s0_truncate: TRUNCATE tbl1;
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step s1_create_table: CREATE TABLE tbl2 (val1 integer, val2 integer);
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step s1_checkpoint: CHECKPOINT;
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step s1_get_changes: SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'skip-empty-xacts', '1', 'include-xids', '0');
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data
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----
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(0 rows)
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step s1_check_snapshot_info: SELECT count(*) > 0 as has_info FROM pg_ls_logicalsnapdir(), pg_get_logical_snapshot_info(name) AS info where info.catchange_count >= 2 and array_length(info.catchange_xip,1) >= 2 and info.committed_count >= 1 and array_length(info.committed_xip,1) >= 1;
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has_info
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--------
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t
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(1 row)
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step s1_check_snapshot_meta: SELECT count(meta.*) > 0 AS has_meta from pg_ls_logicalsnapdir(), pg_get_logical_snapshot_meta(name) as meta;
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has_meta
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--------
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t
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(1 row)
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step s0_commit: COMMIT;
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