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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2003-02-16 02:30:39 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2003-02-16 02:30:39 +0000 |
| commit | 51972a9d5d068dd34b24ff4923981ffb90e5cc2d (patch) | |
| tree | c68fddbb3eaafbd332e84afbafe3c171f6372d4e /src/backend/parser/parse_target.c | |
| parent | de25638d2fbe9e56ecfc60a7dda8a0c56028317a (diff) | |
| download | postgresql-51972a9d5d068dd34b24ff4923981ffb90e5cc2d.tar.gz postgresql-51972a9d5d068dd34b24ff4923981ffb90e5cc2d.zip | |
COALESCE() and NULLIF() are now first-class expressions, not macros
that turn into CASE expressions. They evaluate their arguments at most
once. Patch by Kris Jurka, review and (very light) editorializing by me.
Diffstat (limited to 'src/backend/parser/parse_target.c')
| -rw-r--r-- | src/backend/parser/parse_target.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/src/backend/parser/parse_target.c b/src/backend/parser/parse_target.c index 70aaf18ef58..4108e7557da 100644 --- a/src/backend/parser/parse_target.c +++ b/src/backend/parser/parse_target.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/parser/parse_target.c,v 1.97 2003/02/13 05:53:46 momjian Exp $ + * $Header: /cvsroot/pgsql/src/backend/parser/parse_target.c,v 1.98 2003/02/16 02:30:38 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -482,6 +482,14 @@ FigureColnameInternal(Node *node, char **name) case T_FuncCall: *name = strVal(llast(((FuncCall *) node)->funcname)); return 2; + case T_A_Expr: + /* make nullif() act like a regular function */ + if (((A_Expr *) node)->kind == AEXPR_NULLIF) + { + *name = "nullif"; + return 2; + } + break; case T_A_Const: if (((A_Const *) node)->typename != NULL) { @@ -510,6 +518,10 @@ FigureColnameInternal(Node *node, char **name) return 1; } break; + case T_CoalesceExpr: + /* make coalesce() act like a regular function */ + *name = "coalesce"; + return 2; default: break; } |