database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-11-07 19:06:32 +03:00
Code Activity

Extend ALTER TABLE to allow Foreign Keys to be added without initial validation.

Browse Source 
FK constraints that are marked NOT VALID may later be VALIDATED, which uses an
ShareUpdateExclusiveLock on constraint table and RowShareLock on referenced
table. Significantly reduces lock strength and duration when adding FKs.
New state visible from psql.

Simon Riggs, with reviews from Marko Tiikkaja and Robert Haas
This commit is contained in:
Simon Riggs
2011-02-08 12:23:20 +00:00
parent 7202ad7b8d
commit 722bf7017b
15 changed files with 215 additions and 32 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
src/include/nodes/parsenodes.h
View File

@@ -1140,6 +1140,7 @@ typedef enum AlterTableType
AT_ReAddIndex, /* internal to commands/tablecmds.c */
AT_AddConstraint, /* add constraint */
AT_AddConstraintRecurse, /* internal to commands/tablecmds.c */
AT_ValidateConstraint, /* validate constraint */
AT_ProcessedConstraint, /* pre-processed add constraint (local in
* parser/parse_utilcmd.c) */
AT_AddIndexConstraint, /* add constraint using existing index */
@@ -1182,6 +1183,7 @@ typedef struct AlterTableCmd /* one subcommand of an ALTER TABLE */
Node *transform; /* transformation expr for ALTER TYPE */
DropBehavior behavior; /* RESTRICT or CASCADE for DROP cases */
bool missing_ok; /* skip error if missing? */
bool validated;
} AlterTableCmd;