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4c04be9b05
The txid_XXX family of fmgr functions exposes 64 bit transaction IDs to users as int8. Now that we have an SQL type xid8 for FullTransactionId, define a new set of functions including pg_current_xact_id() and pg_current_snapshot() based on that. Keep the old functions around too, for now. It's a bit sneaky to use the same C functions for both, but since the binary representation is identical except for the signedness of the type, and since older functions are the ones using the wrong signedness, and since we'll presumably drop the older ones after a reasonable period of time, it seems reasonable to switch to FullTransactionId internally and share the code for both. Reviewed-by: Fujii Masao <masao.fujii@oss.nttdata.com> Reviewed-by: Takao Fujii <btfujiitkp@oss.nttdata.com> Reviewed-by: Yoshikazu Imai <imai.yoshikazu@fujitsu.com> Reviewed-by: Mark Dilger <mark.dilger@enterprisedb.com> Discussion: https://postgr.es/m/20190725000636.666m5mad25wfbrri%40alap3.anarazel.de
50 lines
1.9 KiB
Plaintext
50 lines
1.9 KiB
Plaintext
Parsed test spec with 2 sessions
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starting permutation: s0_begin s0_begin_sub0 s0_log_assignment s0_sub_get_base_snap s1_produce_new_snap s0_insert s0_end_sub0 s0_commit s0_get_changes
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step s0_begin: BEGIN;
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step s0_begin_sub0: SAVEPOINT s0;
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step s0_log_assignment: SELECT pg_current_xact_id() IS NULL;
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?column?
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f
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step s0_sub_get_base_snap: INSERT INTO dummy VALUES (0);
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step s1_produce_new_snap: ALTER TABLE harvest ADD COLUMN mangos int;
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step s0_insert: INSERT INTO harvest VALUES (1, 2, 3);
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step s0_end_sub0: RELEASE SAVEPOINT s0;
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step s0_commit: COMMIT;
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step s0_get_changes: SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
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data
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BEGIN
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table public.dummy: INSERT: i[integer]:0
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table public.harvest: INSERT: apples[integer]:1 pears[integer]:2 mangos[integer]:3
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COMMIT
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?column?
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stop
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starting permutation: s0_begin s0_begin_sub0 s0_log_assignment s0_begin_sub1 s0_sub_get_base_snap s1_produce_new_snap s0_insert s0_end_sub1 s0_end_sub0 s0_commit s0_get_changes
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step s0_begin: BEGIN;
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step s0_begin_sub0: SAVEPOINT s0;
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step s0_log_assignment: SELECT pg_current_xact_id() IS NULL;
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?column?
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f
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step s0_begin_sub1: SAVEPOINT s1;
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step s0_sub_get_base_snap: INSERT INTO dummy VALUES (0);
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step s1_produce_new_snap: ALTER TABLE harvest ADD COLUMN mangos int;
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step s0_insert: INSERT INTO harvest VALUES (1, 2, 3);
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step s0_end_sub1: RELEASE SAVEPOINT s1;
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step s0_end_sub0: RELEASE SAVEPOINT s0;
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step s0_commit: COMMIT;
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step s0_get_changes: SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
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data
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BEGIN
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table public.dummy: INSERT: i[integer]:0
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table public.harvest: INSERT: apples[integer]:1 pears[integer]:2 mangos[integer]:3
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COMMIT
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?column?
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stop
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