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Add array_remove() and array_replace() functions.

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These functions support removing or replacing array element value(s)
matching a given search value.  Although intended mainly to support a
future array-foreign-key feature, they seem useful in their own right.

Marco Nenciarini and Gabriele Bartolini, reviewed by Alex Hunsaker
This commit is contained in:
Tom Lane
2012-07-11 13:59:35 -04:00
parent f9951252db
commit 84a42560c8
7 changed files with 415 additions and 1 deletions
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src/include/utils/array.h
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@ -211,6 +211,8 @@ extern Datum generate_subscripts_nodir(PG_FUNCTION_ARGS);
extern Datum array_fill(PG_FUNCTION_ARGS);
extern Datum array_fill_with_lower_bounds(PG_FUNCTION_ARGS);
extern Datum array_unnest(PG_FUNCTION_ARGS);
extern Datum array_remove(PG_FUNCTION_ARGS);
extern Datum array_replace(PG_FUNCTION_ARGS);
extern Datum array_ref(ArrayType *array, int nSubscripts, int *indx,
int arraytyplen, int elmlen, bool elmbyval, char elmalign,