mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-07-14 17:59:18 +02:00
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
53 lines
1.6 KiB
Plaintext
53 lines
1.6 KiB
Plaintext
Parsed test spec with 3 sessions
|
|
|
|
starting permutation: s2b s2txid s1init s3b s3txid s2alter s2c s2b s2txid s3c s2c s1insert s1checkpoint s1start s1insert s1alter s1insert s1start
|
|
step s2b: BEGIN;
|
|
step s2txid: SELECT pg_current_xact_id() IS NULL;
|
|
?column?
|
|
|
|
f
|
|
step s1init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding'); <waiting ...>
|
|
step s3b: BEGIN;
|
|
step s3txid: SELECT pg_current_xact_id() IS NULL;
|
|
?column?
|
|
|
|
f
|
|
step s2alter: ALTER TABLE do_write ADD COLUMN addedbys2 int;
|
|
step s2c: COMMIT;
|
|
step s2b: BEGIN;
|
|
step s2txid: SELECT pg_current_xact_id() IS NULL;
|
|
?column?
|
|
|
|
f
|
|
step s3c: COMMIT;
|
|
step s1init: <... completed>
|
|
?column?
|
|
|
|
init
|
|
step s2c: COMMIT;
|
|
step s1insert: INSERT INTO do_write DEFAULT VALUES;
|
|
step s1checkpoint: CHECKPOINT;
|
|
step s1start: SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', 'false');
|
|
data
|
|
|
|
BEGIN
|
|
table public.do_write: INSERT: id[integer]:1 addedbys2[integer]:null
|
|
COMMIT
|
|
step s1insert: INSERT INTO do_write DEFAULT VALUES;
|
|
step s1alter: ALTER TABLE do_write ADD COLUMN addedbys1 int;
|
|
step s1insert: INSERT INTO do_write DEFAULT VALUES;
|
|
step s1start: SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', 'false');
|
|
data
|
|
|
|
BEGIN
|
|
table public.do_write: INSERT: id[integer]:2 addedbys2[integer]:null
|
|
COMMIT
|
|
BEGIN
|
|
COMMIT
|
|
BEGIN
|
|
table public.do_write: INSERT: id[integer]:3 addedbys2[integer]:null addedbys1[integer]:null
|
|
COMMIT
|
|
?column?
|
|
|
|
stop
|