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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2007-02-14 01:58:58 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2007-02-14 01:58:58 +0000 |
| commit | 7bddca3450cc8631e5bf05e43988cf10ae32230e (patch) | |
| tree | 0bdc9972eb5c687d2dd6d266295de3d317dee229 /src/backend/commands/explain.c | |
| parent | 65e2f55031802dd1ee8f22d880e49b94b3534483 (diff) | |
| download | postgresql-7bddca3450cc8631e5bf05e43988cf10ae32230e.tar.gz postgresql-7bddca3450cc8631e5bf05e43988cf10ae32230e.zip | |
Fix up foreign-key mechanism so that there is a sound semantic basis for the
equality checks it applies, instead of a random dependence on whatever
operators might be named "=". The equality operators will now be selected
from the opfamily of the unique index that the FK constraint depends on to
enforce uniqueness of the referenced columns; therefore they are certain to be
consistent with that index's notion of equality. Among other things this
should fix the problem noted awhile back that pg_dump may fail for foreign-key
constraints on user-defined types when the required operators aren't in the
search path. This also means that the former warning condition about "foreign
key constraint will require costly sequential scans" is gone: if the
comparison condition isn't indexable then we'll reject the constraint
entirely. All per past discussions.
Along the way, make the RI triggers look into pg_constraint for their
information, instead of using pg_trigger.tgargs; and get rid of the always
error-prone fixed-size string buffers in ri_triggers.c in favor of building up
the RI queries in StringInfo buffers.
initdb forced due to columns added to pg_constraint and pg_trigger.
Diffstat (limited to 'src/backend/commands/explain.c')
| -rw-r--r-- | src/backend/commands/explain.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/backend/commands/explain.c b/src/backend/commands/explain.c index ae9839641e5..9ea32d7707a 100644 --- a/src/backend/commands/explain.c +++ b/src/backend/commands/explain.c @@ -7,7 +7,7 @@ * Portions Copyright (c) 1994-5, Regents of the University of California * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/commands/explain.c,v 1.153 2007/01/05 22:19:26 momjian Exp $ + * $PostgreSQL: pgsql/src/backend/commands/explain.c,v 1.154 2007/02/14 01:58:56 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -327,8 +327,8 @@ ExplainOnePlan(QueryDesc *queryDesc, ExplainStmt *stmt, if (instr->ntuples == 0) continue; - if (trig->tgisconstraint && - (conname = GetConstraintNameForTrigger(trig->tgoid)) != NULL) + if (OidIsValid(trig->tgconstraint) && + (conname = get_constraint_name(trig->tgconstraint)) != NULL) { appendStringInfo(&buf, "Trigger for constraint %s", conname); |