greenplumn pg_collation 源码
greenplumn pg_collation 代码
文件路径：/src/include/catalog/pg_collation.h
/*-------------------------------------------------------------------------
*
* pg_collation.h
* definition of the "collation" system catalog (pg_collation)
*
*
* Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/catalog/pg_collation.h
*
* NOTES
* The Catalog.pm module reads this file and derives schema
* information.
*
*-------------------------------------------------------------------------
*/
#ifndef PG_COLLATION_H
#define PG_COLLATION_H
#include "catalog/genbki.h"
#include "catalog/pg_collation_d.h"
/* ----------------
* pg_collation definition. cpp turns this into
* typedef struct FormData_pg_collation
* ----------------
*/
CATALOG(pg_collation,3456,CollationRelationId)
{
Oid oid; /* oid */
NameData collname; /* collation name */
Oid collnamespace; /* OID of namespace containing collation */
Oid collowner; /* owner of collation */
char collprovider; /* see constants below */
bool collisdeterministic BKI_DEFAULT(t);
int32 collencoding; /* encoding for this collation; -1 = "all" */
NameData collcollate; /* LC_COLLATE setting */
NameData collctype; /* LC_CTYPE setting */
#ifdef CATALOG_VARLEN /* variable-length fields start here */
text collversion; /* provider-dependent version of collation
* data */
#endif
} FormData_pg_collation;
/* ----------------
* Form_pg_collation corresponds to a pointer to a row with
* the format of pg_collation relation.
* ----------------
*/
typedef FormData_pg_collation *Form_pg_collation;
#ifdef EXPOSE_TO_CLIENT_CODE
#define COLLPROVIDER_DEFAULT 'd'
#define COLLPROVIDER_ICU 'i'
#define COLLPROVIDER_LIBC 'c'
#endif /* EXPOSE_TO_CLIENT_CODE */
extern Oid CollationCreate(const char *collname, Oid collnamespace,
Oid collowner,
char collprovider,
bool collisdeterministic,
int32 collencoding,
const char *collcollate, const char *collctype,
const char *collversion,
bool if_not_exists,
bool quiet);
extern void RemoveCollationById(Oid collationOid);
#endif /* PG_COLLATION_H */
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