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JSON generation improvements.

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This adds the following:

    json_agg(anyrecord) -> json
    to_json(any) -> json
    hstore_to_json(hstore) -> json (also used as a cast)
    hstore_to_json_loose(hstore) -> json

The last provides heuristic treatment of numbers and booleans.

Also, in json generation, if any non-builtin type has a cast to json,
that function is used instead of the type's output function.

Andrew Dunstan, reviewed by Steve Singer.

Catalog version bumped.
This commit is contained in:
Andrew Dunstan
2013-03-10 17:35:36 -04:00
parent dd28c410f7
commit 38fb4d978c
13 changed files with 699 additions and 21 deletions
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5
src/include/utils/json.h
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@ -25,6 +25,11 @@ extern Datum array_to_json(PG_FUNCTION_ARGS);
extern Datum array_to_json_pretty(PG_FUNCTION_ARGS);
extern Datum row_to_json(PG_FUNCTION_ARGS);
extern Datum row_to_json_pretty(PG_FUNCTION_ARGS);
extern Datum to_json(PG_FUNCTION_ARGS);
extern Datum json_agg_transfn(PG_FUNCTION_ARGS);
extern Datum json_agg_finalfn(PG_FUNCTION_ARGS);
extern void escape_json(StringInfo buf, const char *str);
#endif /* JSON_H */