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Add transforms feature

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This provides a mechanism for specifying conversions between SQL data
types and procedural languages.  As examples, there are transforms
for hstore and ltree for PL/Perl and PL/Python.

reviews by Pavel Stěhule and Andres Freund
This commit is contained in:
Peter Eisentraut
2015-04-26 10:33:14 -04:00
parent f320cbb615
commit cac7658205
101 changed files with 6034 additions and 2811 deletions
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3
src/include/utils/lsyscache.h
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@@ -70,6 +70,7 @@ extern void get_atttypetypmodcoll(Oid relid, AttrNumber attnum,
Oid *typid, int32 *typmod, Oid *collid);
extern char *get_collation_name(Oid colloid);
extern char *get_constraint_name(Oid conoid);
extern char *get_language_name(Oid langoid, bool missing_ok);
extern Oid get_opclass_family(Oid opclass);
extern Oid get_opclass_input_type(Oid opclass);
extern RegProcedure get_opcode(Oid opno);
@@ -101,6 +102,8 @@ extern Oid get_rel_namespace(Oid relid);
extern Oid get_rel_type_id(Oid relid);
extern char get_rel_relkind(Oid relid);
extern Oid get_rel_tablespace(Oid relid);
extern Oid get_transform_fromsql(Oid typid, Oid langid, List *trftypes);
extern Oid get_transform_tosql(Oid typid, Oid langid, List *trftypes);
extern bool get_typisdefined(Oid typid);
extern int16 get_typlen(Oid typid);
extern bool get_typbyval(Oid typid);