<primary>regclass</primary>
</indexterm>
+ <indexterm zone="datatype-oid">
+ <primary>regcollation</primary>
+ </indexterm>
+
<indexterm zone="datatype-oid">
<primary>regconfig</primary>
</indexterm>
<entry><literal>pg_type</literal></entry>
</row>
+ <row>
+ <entry><type>regcollation</type></entry>
+ <entry><structname>pg_collation</structname></entry>
+ <entry>collation name</entry>
+ <entry><literal>"POSIX"</literal></entry>
+ </row>
<row>
<entry><type>regconfig</type></entry>
<primary>to_regclass</primary>
</indexterm>
+ <indexterm>
+ <primary>to_regcollation</primary>
+ </indexterm>
+
<indexterm>
<primary>to_regnamespace</primary>
</indexterm>
<entry><type>regclass</type></entry>
<entry>get the OID of the named relation</entry>
</row>
+ <row>
+ <entry><literal><function>to_regcollation(<parameter>coll_name</parameter>)</function></literal></entry>
+ <entry><type>regcollation</type></entry>
+ <entry>get the OID of the named collation</entry>
+ </row>
<row>
<entry><literal><function>to_regnamespace(<parameter>schema_name</parameter>)</function></literal></entry>
<entry><type>regnamespace</type></entry>
</para>
<para>
- The functions <function>to_regclass</function>,
+ The functions <function>to_regclass</function>, <function>to_regcollation</function>,
<function>to_regnamespace</function>, <function>to_regoper</function>,
<function>to_regoperator</function>, <function>to_regrole</function>,
<function>to_regproc</function>, <function>to_regprocedure</function>, and
- <function>to_regtype</function>, functions translate relation, schema,
+ <function>to_regtype</function>, functions translate relation, collation, schema,
operator, role, function, and type names (given as <type>text</type>) to
objects of the corresponding <type>reg*</type> type (see <xref
linkend="datatype-oid"/> about the types). These functions differ from a
<application>pg_upgrade</application> does not support upgrading of databases
containing table columns using these <type>reg*</type> OID-referencing system data types:
<simplelist>
+ <member><type>regcollation</type></member>
<member><type>regconfig</type></member>
<member><type>regdictionary</type></member>
<member><type>regnamespace</type></member>
#include "access/htup_details.h"
#include "catalog/namespace.h"
#include "catalog/pg_class.h"
+#include "catalog/pg_collation.h"
#include "catalog/pg_operator.h"
#include "catalog/pg_proc.h"
#include "catalog/pg_ts_config.h"
}
+/*
+ * regcollationin - converts "collationname" to collation OID
+ *
+ * We also accept a numeric OID, for symmetry with the output routine.
+ *
+ * '-' signifies unknown (OID 0). In all other cases, the input must
+ * match an existing pg_collation entry.
+ */
+Datum
+regcollationin(PG_FUNCTION_ARGS)
+{
+ char *collation_name_or_oid = PG_GETARG_CSTRING(0);
+ Oid result = InvalidOid;
+ List *names;
+
+ /* '-' ? */
+ if (strcmp(collation_name_or_oid, "-") == 0)
+ PG_RETURN_OID(InvalidOid);
+
+ /* Numeric OID? */
+ if (collation_name_or_oid[0] >= '0' &&
+ collation_name_or_oid[0] <= '9' &&
+ strspn(collation_name_or_oid, "0123456789") == strlen(collation_name_or_oid))
+ {
+ result = DatumGetObjectId(DirectFunctionCall1(oidin,
+ CStringGetDatum(collation_name_or_oid)));
+ PG_RETURN_OID(result);
+ }
+
+ /* Else it's a name, possibly schema-qualified */
+
+ /* The rest of this wouldn't work in bootstrap mode */
+ if (IsBootstrapProcessingMode())
+ elog(ERROR, "regcollation values must be OIDs in bootstrap mode");
+
+ /*
+ * Normal case: parse the name into components and see if it matches any
+ * pg_collation entries in the current search path.
+ */
+ names = stringToQualifiedNameList(collation_name_or_oid);
+
+ result = get_collation_oid(names, false);
+
+ PG_RETURN_OID(result);
+}
+
+/*
+ * to_regcollation - converts "collationname" to collation OID
+ *
+ * If the name is not found, we return NULL.
+ */
+Datum
+to_regcollation(PG_FUNCTION_ARGS)
+{
+ char *collation_name = text_to_cstring(PG_GETARG_TEXT_PP(0));
+ Oid result;
+ List *names;
+
+ /*
+ * Parse the name into components and see if it matches any pg_collation
+ * entries in the current search path.
+ */
+ names = stringToQualifiedNameList(collation_name);
+
+ /* We might not even have permissions on this relation; don't lock it. */
+ result = get_collation_oid(names, true);
+
+ if (OidIsValid(result))
+ PG_RETURN_OID(result);
+ else
+ PG_RETURN_NULL();
+}
+
+/*
+ * regcollationout - converts collation OID to "collation_name"
+ */
+Datum
+regcollationout(PG_FUNCTION_ARGS)
+{
+ Oid collationid = PG_GETARG_OID(0);
+ char *result;
+ HeapTuple collationtup;
+
+ if (collationid == InvalidOid)
+ {
+ result = pstrdup("-");
+ PG_RETURN_CSTRING(result);
+ }
+
+ collationtup = SearchSysCache1(COLLOID, ObjectIdGetDatum(collationid));
+
+ if (HeapTupleIsValid(collationtup))
+ {
+ Form_pg_collation collationform = (Form_pg_collation) GETSTRUCT(collationtup);
+ char *collationname = NameStr(collationform->collname);
+
+ /*
+ * In bootstrap mode, skip the fancy namespace stuff and just return
+ * the collation name. (This path is only needed for debugging output
+ * anyway.)
+ */
+ if (IsBootstrapProcessingMode())
+ result = pstrdup(collationname);
+ else
+ {
+ char *nspname;
+
+ /*
+ * Would this collation be found by regcollationin? If not, qualify it.
+ */
+ if (CollationIsVisible(collationid))
+ nspname = NULL;
+ else
+ nspname = get_namespace_name(collationform->collnamespace);
+
+ result = quote_qualified_identifier(nspname, collationname);
+ }
+
+ ReleaseSysCache(collationtup);
+ }
+ else
+ {
+ /* If OID doesn't match any pg_collation entry, return it numerically */
+ result = (char *) palloc(NAMEDATALEN);
+ snprintf(result, NAMEDATALEN, "%u", collationid);
+ }
+
+ PG_RETURN_CSTRING(result);
+}
+
+/*
+ * regcollationrecv - converts external binary format to regcollation
+ */
+Datum
+regcollationrecv(PG_FUNCTION_ARGS)
+{
+ /* Exactly the same as oidrecv, so share code */
+ return oidrecv(fcinfo);
+}
+
+/*
+ * regcollationsend - converts regcollation to binary format
+ */
+Datum
+regcollationsend(PG_FUNCTION_ARGS)
+{
+ /* Exactly the same as oidsend, so share code */
+ return oidsend(fcinfo);
+}
+
+
/*
* regtypein - converts "typename" to type OID
*
" WHERE nspname = 'pg_catalog') AND"
" t.typname IN ( "
/* regclass.oid is preserved, so 'regclass' is OK */
+ " 'regcollation', "
" 'regconfig', "
" 'regdictionary', "
" 'regnamespace', "
*/
/* yyyymmddN */
-#define CATALOG_VERSION_NO 202003051
+#define CATALOG_VERSION_NO 202003181
#endif
castcontext => 'a', castmethod => 'f' },
{ castsource => 'regclass', casttarget => 'int4', castfunc => '0',
castcontext => 'a', castmethod => 'b' },
+{ castsource => 'oid', casttarget => 'regcollation', castfunc => '0',
+ castcontext => 'i', castmethod => 'b' },
+{ castsource => 'regcollation', casttarget => 'oid', castfunc => '0',
+ castcontext => 'i', castmethod => 'b' },
+{ castsource => 'int8', casttarget => 'regcollation', castfunc => 'oid',
+ castcontext => 'i', castmethod => 'f' },
+{ castsource => 'int2', casttarget => 'regcollation', castfunc => 'int4(int2)',
+ castcontext => 'i', castmethod => 'f' },
+{ castsource => 'int4', casttarget => 'regcollation', castfunc => '0',
+ castcontext => 'i', castmethod => 'b' },
+{ castsource => 'regcollation', casttarget => 'int8', castfunc => 'int8(oid)',
+ castcontext => 'a', castmethod => 'f' },
+{ castsource => 'regcollation', casttarget => 'int4', castfunc => '0',
+ castcontext => 'a', castmethod => 'b' },
{ castsource => 'oid', casttarget => 'regtype', castfunc => '0',
castcontext => 'i', castmethod => 'b' },
{ castsource => 'regtype', casttarget => 'oid', castfunc => '0',
{ oid => '3495', descr => 'convert classname to regclass',
proname => 'to_regclass', provolatile => 's', prorettype => 'regclass',
proargtypes => 'text', prosrc => 'to_regclass' },
+{ oid => '4193', descr => 'I/O',
+ proname => 'regcollationin', provolatile => 's', prorettype => 'regcollation',
+ proargtypes => 'cstring', prosrc => 'regcollationin' },
+{ oid => '4194', descr => 'I/O',
+ proname => 'regcollationout', provolatile => 's', prorettype => 'cstring',
+ proargtypes => 'regcollation', prosrc => 'regcollationout' },
+{ oid => '4195', descr => 'convert classname to regcollation',
+ proname => 'to_regcollation', provolatile => 's', prorettype => 'regcollation',
+ proargtypes => 'text', prosrc => 'to_regcollation' },
{ oid => '2220', descr => 'I/O',
proname => 'regtypein', provolatile => 's', prorettype => 'regtype',
proargtypes => 'cstring', prosrc => 'regtypein' },
{ oid => '2453', descr => 'I/O',
proname => 'regclasssend', prorettype => 'bytea', proargtypes => 'regclass',
prosrc => 'regclasssend' },
+{ oid => '4196', descr => 'I/O',
+ proname => 'regcollationrecv', prorettype => 'regcollation',
+ proargtypes => 'internal', prosrc => 'regcollationrecv' },
+{ oid => '4197', descr => 'I/O',
+ proname => 'regcollationsend', prorettype => 'bytea', proargtypes => 'regcollation',
+ prosrc => 'regcollationsend' },
{ oid => '2454', descr => 'I/O',
proname => 'regtyperecv', prorettype => 'regtype', proargtypes => 'internal',
prosrc => 'regtyperecv' },
typname => 'regclass', typlen => '4', typbyval => 't', typcategory => 'N',
typinput => 'regclassin', typoutput => 'regclassout',
typreceive => 'regclassrecv', typsend => 'regclasssend', typalign => 'i' },
+{ oid => '4191', array_type_oid => '4192', descr => 'registered collation',
+ typname => 'regcollation', typlen => '4', typbyval => 't', typcategory => 'N',
+ typinput => 'regcollationin', typoutput => 'regcollationout',
+ typreceive => 'regcollationrecv', typsend => 'regcollationsend', typalign => 'i' },
{ oid => '2206', array_type_oid => '2211', descr => 'registered type',
typname => 'regtype', typlen => '4', typbyval => 't', typcategory => 'N',
typinput => 'regtypein', typoutput => 'regtypeout',
integer
(1 row)
+SELECT regcollation('"POSIX"');
+ regcollation
+--------------
+ "POSIX"
+(1 row)
+
SELECT to_regoper('||/');
to_regoper
------------
integer
(1 row)
+SELECT to_regcollation('"POSIX"');
+ to_regcollation
+-----------------
+ "POSIX"
+(1 row)
+
-- with schemaname
SELECT regoper('pg_catalog.||/');
regoper
integer
(1 row)
+SELECT regcollation('pg_catalog."POSIX"');
+ regcollation
+--------------
+ "POSIX"
+(1 row)
+
SELECT to_regoper('pg_catalog.||/');
to_regoper
------------
integer
(1 row)
+SELECT to_regcollation('pg_catalog."POSIX"');
+ to_regcollation
+-----------------
+ "POSIX"
+(1 row)
+
-- schemaname not applicable
SELECT regrole('regress_regrole_test');
regrole
ERROR: schema "ng_catalog" does not exist
LINE 1: SELECT regtype('ng_catalog.int4');
^
+SELECT regcollation('ng_catalog."POSIX"');
+ERROR: schema "ng_catalog" does not exist
+LINE 1: SELECT regcollation('ng_catalog."POSIX"');
+ ^
-- schemaname not applicable
SELECT regrole('regress_regrole_test');
ERROR: role "regress_regrole_test" does not exist
(1 row)
+SELECT to_regcollation('notacollation');
+ to_regcollation
+-----------------
+
+(1 row)
+
-- with schemaname
SELECT to_regoper('ng_catalog.||/');
to_regoper
(1 row)
+SELECT to_regcollation('ng_catalog."POSIX"');
+ to_regcollation
+-----------------
+
+(1 row)
+
-- schemaname not applicable
SELECT to_regrole('regress_regrole_test');
to_regrole
SELECT regprocedure('abs(numeric)');
SELECT regclass('pg_class');
SELECT regtype('int4');
+SELECT regcollation('"POSIX"');
SELECT to_regoper('||/');
SELECT to_regoperator('+(int4,int4)');
SELECT to_regprocedure('abs(numeric)');
SELECT to_regclass('pg_class');
SELECT to_regtype('int4');
+SELECT to_regcollation('"POSIX"');
-- with schemaname
SELECT regprocedure('pg_catalog.abs(numeric)');
SELECT regclass('pg_catalog.pg_class');
SELECT regtype('pg_catalog.int4');
+SELECT regcollation('pg_catalog."POSIX"');
SELECT to_regoper('pg_catalog.||/');
SELECT to_regproc('pg_catalog.now');
SELECT to_regprocedure('pg_catalog.abs(numeric)');
SELECT to_regclass('pg_catalog.pg_class');
SELECT to_regtype('pg_catalog.int4');
+SELECT to_regcollation('pg_catalog."POSIX"');
-- schemaname not applicable
SELECT regprocedure('ng_catalog.abs(numeric)');
SELECT regclass('ng_catalog.pg_class');
SELECT regtype('ng_catalog.int4');
+SELECT regcollation('ng_catalog."POSIX"');
-- schemaname not applicable
SELECT to_regprocedure('absinthe(numeric)');
SELECT to_regclass('pg_classes');
SELECT to_regtype('int3');
+SELECT to_regcollation('notacollation');
-- with schemaname
SELECT to_regprocedure('ng_catalog.abs(numeric)');
SELECT to_regclass('ng_catalog.pg_class');
SELECT to_regtype('ng_catalog.int4');
+SELECT to_regcollation('ng_catalog."POSIX"');
-- schemaname not applicable
projects / postgresql.git / commitdiff