diff options
Diffstat (limited to 'src/backend/parser/parse_target.c')
| -rw-r--r-- | src/backend/parser/parse_target.c | 31 |
1 files changed, 29 insertions, 2 deletions
diff --git a/src/backend/parser/parse_target.c b/src/backend/parser/parse_target.c index ce3f51ca6e5..007a3cc6936 100644 --- a/src/backend/parser/parse_target.c +++ b/src/backend/parser/parse_target.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/parser/parse_target.c,v 1.174 2009/10/31 01:41:31 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/parser/parse_target.c,v 1.175 2009/12/23 02:35:22 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -1410,13 +1410,40 @@ FigureColname(Node *node) { char *name = NULL; - FigureColnameInternal(node, &name); + (void) FigureColnameInternal(node, &name); if (name != NULL) return name; /* default result if we can't guess anything */ return "?column?"; } +/* + * FigureIndexColname - + * choose the name for an expression column in an index + * + * This is actually just like FigureColname, except we return NULL if + * we can't pick a good name. + */ +char * +FigureIndexColname(Node *node) +{ + char *name = NULL; + + (void) FigureColnameInternal(node, &name); + return name; +} + +/* + * FigureColnameInternal - + * internal workhorse for FigureColname + * + * Return value indicates strength of confidence in result: + * 0 - no information + * 1 - second-best name choice + * 2 - good name choice + * The return value is actually only used internally. + * If the result isn't zero, *name is set to the chosen name. + */ static int FigureColnameInternal(Node *node, char **name) { |