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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
44 lines
1.9 KiB
RPMSpec
44 lines
1.9 KiB
RPMSpec
# Test snapshot transfer from subxact to top-level and receival of later snaps.
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setup
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{
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SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding'); -- must be first write in xact
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DROP TABLE IF EXISTS dummy;
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CREATE TABLE dummy(i int);
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DROP TABLE IF EXISTS harvest;
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CREATE TABLE harvest(apples int, pears int);
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}
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teardown
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{
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DROP TABLE IF EXISTS harvest;
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DROP TABLE IF EXISTS dummy;
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SELECT 'stop' FROM pg_drop_replication_slot('isolation_slot');
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}
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session "s0"
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setup { SET synchronous_commit=on; }
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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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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 "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_end_sub1" { RELEASE SAVEPOINT s1; }
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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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session "s1"
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setup { SET synchronous_commit=on; }
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step "s1_produce_new_snap" { ALTER TABLE harvest ADD COLUMN mangos int; }
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# start top-level without base snap, get base snap in subxact, then create new
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# snap and make sure it is queued.
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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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# In previous test, we firstly associated subxact with xact and only then got
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# base snap; now nest one more subxact to get snap first and only then (at
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# commit) associate it with toplevel.
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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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