diff options
Diffstat (limited to 'src/backend/rewrite/rewriteHandler.c')
| -rw-r--r-- | src/backend/rewrite/rewriteHandler.c | 52 |
1 files changed, 23 insertions, 29 deletions
diff --git a/src/backend/rewrite/rewriteHandler.c b/src/backend/rewrite/rewriteHandler.c index 6ece2ae938f..889351067db 100644 --- a/src/backend/rewrite/rewriteHandler.c +++ b/src/backend/rewrite/rewriteHandler.c @@ -7,7 +7,7 @@ * * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteHandler.c,v 1.90 2001/03/22 03:59:44 momjian Exp $ + * $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteHandler.c,v 1.91 2001/03/22 06:16:16 momjian Exp $ * *------------------------------------------------------------------------- */ @@ -672,17 +672,15 @@ fireRules(Query *parsetree, { Query *qual_product; - /* ---------- - * If there are instead rules with qualifications, - * the original query is still performed. But all - * the negated rule qualifications of the instead - * rules are added so it does its actions only - * in cases where the rule quals of all instead - * rules are false. Think of it as the default - * action in a case. We save this in *qual_products - * so deepRewriteQuery() can add it to the query - * list after we mangled it up enough. - * ---------- + /* + * If there are instead rules with qualifications, the + * original query is still performed. But all the negated rule + * qualifications of the instead rules are added so it does + * its actions only in cases where the rule quals of all + * instead rules are false. Think of it as the default action + * in a case. We save this in *qual_products so + * deepRewriteQuery() can add it to the query list after we + * mangled it up enough. */ if (*qual_products == NIL) qual_product = parsetree; @@ -722,10 +720,9 @@ fireRules(Query *parsetree, pfree(info); } - /* ---------- - * If this was an unqualified instead rule, - * throw away an eventually saved 'default' parsetree - * ---------- + /* + * If this was an unqualified instead rule, throw away an + * eventually saved 'default' parsetree */ if (event_qual == NULL && *instead_flag) *qual_products = NIL; @@ -842,23 +839,20 @@ deepRewriteQuery(Query *parsetree) rewritten = nconc(rewritten, newstuff); } - /* ---------- - * qual_products are the original query with the negated - * rule qualification of an instead rule - * ---------- + /* + * qual_products are the original query with the negated rule + * qualification of an instead rule */ if (qual_products != NIL) rewritten = nconc(rewritten, qual_products); - /* ---------- - * The original query is appended last (if no "instead" rule) - * because update and delete rule actions might not do - * anything if they are invoked after the update or - * delete is performed. The command counter increment - * between the query execution makes the deleted (and - * maybe the updated) tuples disappear so the scans - * for them in the rule actions cannot find them. - * ---------- + /* + * The original query is appended last (if no "instead" rule) because + * update and delete rule actions might not do anything if they are + * invoked after the update or delete is performed. The command + * counter increment between the query execution makes the deleted + * (and maybe the updated) tuples disappear so the scans for them in + * the rule actions cannot find them. */ if (!instead) rewritten = lappend(rewritten, parsetree); |