diff options
Diffstat (limited to 'src/backend/utils/adt/ruleutils.c')
| -rw-r--r-- | src/backend/utils/adt/ruleutils.c | 36 |
1 files changed, 29 insertions, 7 deletions
diff --git a/src/backend/utils/adt/ruleutils.c b/src/backend/utils/adt/ruleutils.c index f05e6a2cb93..8d06f54e479 100644 --- a/src/backend/utils/adt/ruleutils.c +++ b/src/backend/utils/adt/ruleutils.c @@ -9,7 +9,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/utils/adt/ruleutils.c,v 1.296 2009/02/25 18:00:01 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/utils/adt/ruleutils.c,v 1.297 2009/04/05 19:59:40 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -4404,20 +4404,42 @@ get_rule_expr(Node *node, deparse_context *context, case T_SubPlan: { + SubPlan *subplan = (SubPlan *) node; + /* * We cannot see an already-planned subplan in rule deparsing, - * only while EXPLAINing a query plan. For now, just punt. + * only while EXPLAINing a query plan. We don't try to + * reconstruct the original SQL, just reference the subplan + * that appears elsewhere in EXPLAIN's result. */ - if (((SubPlan *) node)->useHashTable) - appendStringInfo(buf, "(hashed subplan)"); + if (subplan->useHashTable) + appendStringInfo(buf, "(hashed %s)", subplan->plan_name); else - appendStringInfo(buf, "(subplan)"); + appendStringInfo(buf, "(%s)", subplan->plan_name); } break; case T_AlternativeSubPlan: - /* As above, just punt */ - appendStringInfo(buf, "(alternative subplans)"); + { + AlternativeSubPlan *asplan = (AlternativeSubPlan *) node; + ListCell *lc; + + /* As above, this can only happen during EXPLAIN */ + appendStringInfo(buf, "(alternatives: "); + foreach(lc, asplan->subplans) + { + SubPlan *splan = (SubPlan *) lfirst(lc); + + Assert(IsA(splan, SubPlan)); + if (splan->useHashTable) + appendStringInfo(buf, "hashed %s", splan->plan_name); + else + appendStringInfo(buf, "%s", splan->plan_name); + if (lnext(lc)) + appendStringInfo(buf, " or "); + } + appendStringInfo(buf, ")"); + } break; case T_FieldSelect: |