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Allow new values to be added to an existing enum type.

Browse Source 
After much expenditure of effort, we've got this to the point where the
performance penalty is pretty minimal in typical cases.

Andrew Dunstan, reviewed by Brendan Jurd, Dean Rasheed, and Tom Lane
This commit is contained in:
Tom Lane
2010-10-24 23:04:37 -04:00
parent 24b29ca8f9
commit 84c123be1d
23 changed files with 1422 additions and 170 deletions
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19
contrib/pg_upgrade_support/pg_upgrade_support.c
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@ -16,13 +16,6 @@
/* THIS IS USED ONLY FOR PG >= 9.0 */
/*
* Cannot include "catalog/pg_enum.h" here because we might
* not be compiling against PG 9.0.
*/
extern void EnumValuesCreate(Oid enumTypeOid, List *vals,
Oid binary_upgrade_next_pg_enum_oid);
#ifdef PG_MODULE_MAGIC
PG_MODULE_MAGIC;
#endif
@ -33,6 +26,7 @@ extern PGDLLIMPORT Oid binary_upgrade_next_pg_type_toast_oid;
extern PGDLLIMPORT Oid binary_upgrade_next_heap_relfilenode;
extern PGDLLIMPORT Oid binary_upgrade_next_toast_relfilenode;
extern PGDLLIMPORT Oid binary_upgrade_next_index_relfilenode;
extern PGDLLIMPORT Oid binary_upgrade_next_pg_enum_oid;
Datum set_next_pg_type_oid(PG_FUNCTION_ARGS);
Datum set_next_pg_type_array_oid(PG_FUNCTION_ARGS);
@ -40,7 +34,7 @@ Datum set_next_pg_type_toast_oid(PG_FUNCTION_ARGS);
Datum set_next_heap_relfilenode(PG_FUNCTION_ARGS);
Datum set_next_toast_relfilenode(PG_FUNCTION_ARGS);
Datum set_next_index_relfilenode(PG_FUNCTION_ARGS);
Datum add_pg_enum_label(PG_FUNCTION_ARGS);
Datum set_next_pg_enum_oid(PG_FUNCTION_ARGS);
PG_FUNCTION_INFO_V1(set_next_pg_type_oid);
PG_FUNCTION_INFO_V1(set_next_pg_type_array_oid);
@ -48,7 +42,7 @@ PG_FUNCTION_INFO_V1(set_next_pg_type_toast_oid);
PG_FUNCTION_INFO_V1(set_next_heap_relfilenode);
PG_FUNCTION_INFO_V1(set_next_toast_relfilenode);
PG_FUNCTION_INFO_V1(set_next_index_relfilenode);
PG_FUNCTION_INFO_V1(add_pg_enum_label);
PG_FUNCTION_INFO_V1(set_next_pg_enum_oid);
Datum
set_next_pg_type_oid(PG_FUNCTION_ARGS)
@ -111,14 +105,11 @@ set_next_index_relfilenode(PG_FUNCTION_ARGS)
}
Datum
add_pg_enum_label(PG_FUNCTION_ARGS)
set_next_pg_enum_oid(PG_FUNCTION_ARGS)
{
Oid enumoid = PG_GETARG_OID(0);
Oid typoid = PG_GETARG_OID(1);
Name label = PG_GETARG_NAME(2);
EnumValuesCreate(typoid, list_make1(makeString(NameStr(*label))),
enumoid);
binary_upgrade_next_pg_enum_oid = enumoid;
PG_RETURN_VOID();
}