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Add new SQL function, format(text).

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Currently, three conversion format specifiers are supported: %s for a
string, %L for an SQL literal, and %I for an SQL identifier.  The latter
two are deliberately designed not to overlap with what sprintf() already
supports, in case we want to add more of sprintf()'s functionality here
later.

Patch by Pavel Stehule, heavily revised by me.  Reviewed by Jeff Janes
and, in earlier versions, by Itagaki Takahiro and Tom Lane.
This commit is contained in:
Robert Haas
2010-11-20 00:21:17 -05:00
parent 89a368418c
commit 7504870778
7 changed files with 374 additions and 15 deletions
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2
src/include/utils/builtins.h
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@ -743,6 +743,8 @@ extern Datum text_concat_ws(PG_FUNCTION_ARGS);
extern Datum text_left(PG_FUNCTION_ARGS);
extern Datum text_right(PG_FUNCTION_ARGS);
extern Datum text_reverse(PG_FUNCTION_ARGS);
extern Datum text_format(PG_FUNCTION_ARGS);
extern Datum text_format_nv(PG_FUNCTION_ARGS);
/* version.c */
extern Datum pgsql_version(PG_FUNCTION_ARGS);