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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2003-01-08 22:06:23 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2003-01-08 22:06:23 +0000 |
| commit | 2d140d35a4170a6ad20dae5c01a381b5b4a4b6a3 (patch) | |
| tree | a9cb21aae59bbc611d32e2a39f604cfc4df8707b /src/backend/commands/tablecmds.c | |
| parent | 51d2e3bd6e5b3c9f3bb7aef465bd4f8ce2527d78 (diff) | |
| download | postgresql-2d140d35a4170a6ad20dae5c01a381b5b4a4b6a3.tar.gz postgresql-2d140d35a4170a6ad20dae5c01a381b5b4a4b6a3.zip | |
Reconsider old decision to try to constant-fold default and constraint
expressions before they are stored. This seems like not such a hot idea,
particularly now that the constant-folder will try to inline SQL functions.
Diffstat (limited to 'src/backend/commands/tablecmds.c')
| -rw-r--r-- | src/backend/commands/tablecmds.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/src/backend/commands/tablecmds.c b/src/backend/commands/tablecmds.c index 3f9cad16ce4..84ea31885d6 100644 --- a/src/backend/commands/tablecmds.c +++ b/src/backend/commands/tablecmds.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/commands/tablecmds.c,v 1.64 2002/12/30 19:45:17 tgl Exp $ + * $Header: /cvsroot/pgsql/src/backend/commands/tablecmds.c,v 1.65 2003/01/08 22:06:23 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -2756,7 +2756,10 @@ AlterTableAddCheckConstraint(Relation rel, Constraint *constr) elog(ERROR, "cannot use aggregate function in CHECK constraint expression"); /* - * Might as well try to reduce any constant expressions. + * Might as well try to reduce any constant expressions, so as to + * minimize overhead while testing the constraint at each row. + * + * Note that the stored form of the constraint will NOT be const-folded. */ expr = eval_const_expressions(expr); |