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Add get_bit/set_bit functions for bit strings, paralleling those for bytea,

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and implement OVERLAY() for bit strings and bytea.

In passing also convert text OVERLAY() to a true built-in, instead of
relying on a SQL function.

Leonardo F, reviewed by Kevin Grittner
This commit is contained in:
Tom Lane
2010-01-25 20:55:32 +00:00
parent 1d1f425f8d
commit 9507c8a1db
13 changed files with 554 additions and 93 deletions
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6
src/include/utils/varbit.h
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@@ -8,7 +8,7 @@
* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/utils/varbit.h,v 1.30 2010/01/07 20:17:44 tgl Exp $
* $PostgreSQL: pgsql/src/include/utils/varbit.h,v 1.31 2010/01/25 20:55:32 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -89,6 +89,8 @@ extern Datum bitshiftright(PG_FUNCTION_ARGS);
extern Datum bitcat(PG_FUNCTION_ARGS);
extern Datum bitsubstr(PG_FUNCTION_ARGS);
extern Datum bitsubstr_no_len(PG_FUNCTION_ARGS);
extern Datum bitoverlay(PG_FUNCTION_ARGS);
extern Datum bitoverlay_no_len(PG_FUNCTION_ARGS);
extern Datum bitlength(PG_FUNCTION_ARGS);
extern Datum bitoctetlength(PG_FUNCTION_ARGS);
extern Datum bitfromint4(PG_FUNCTION_ARGS);
@@ -96,5 +98,7 @@ extern Datum bittoint4(PG_FUNCTION_ARGS);
extern Datum bitfromint8(PG_FUNCTION_ARGS);
extern Datum bittoint8(PG_FUNCTION_ARGS);
extern Datum bitposition(PG_FUNCTION_ARGS);
extern Datum bitsetbit(PG_FUNCTION_ARGS);
extern Datum bitgetbit(PG_FUNCTION_ARGS);
#endif