SQL:2008 syntax CURRENT_CATALOG, CURRENT_SCHEMA, SET CATALOG, SET SCHEMA.
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Peter Eisentraut
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<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.450 2008/10/14 17:12:32 tgl Exp $ -->
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<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.451 2008/10/27 09:37:46 petere Exp $ -->
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<chapter id="functions">
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<title>Functions and Operators</title>
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@ -3184,7 +3184,8 @@ cast(-44 as bit(12)) <lineannotation>111111010100</lineannotation>
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function fails and returns null. To indicate the part of the
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pattern that should be returned on success, the pattern must contain
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two occurrences of the escape character followed by a double quote
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(<literal>"</>). The text matching the portion of the pattern
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(<literal>"</>). <!-- " font-lock sanity -->
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The text matching the portion of the pattern
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between these markers is returned.
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</para>
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@ -10932,6 +10933,12 @@ postgres=# select * from unnest2(array[[1,2],[3,4]]);
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</thead>
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<tbody>
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<row>
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<entry><literal><function>current_catalog</function></literal></entry>
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<entry><type>name</type></entry>
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<entry>name of current database (called <quote>catalog</quote> in the SQL standard)</entry>
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</row>
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<row>
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<entry><literal><function>current_database</function>()</literal></entry>
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<entry><type>name</type></entry>
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@ -10939,7 +10946,7 @@ postgres=# select * from unnest2(array[[1,2],[3,4]]);
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</row>
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<row>
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<entry><literal><function>current_schema</function>()</literal></entry>
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<entry><literal><function>current_schema</function>[()]</literal></entry>
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<entry><type>name</type></entry>
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<entry>name of current schema</entry>
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</row>
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@ -11055,6 +11062,10 @@ postgres=# select * from unnest2(array[[1,2],[3,4]]);
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<secondary>current</secondary>
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</indexterm>
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<indexterm>
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<primary>current_catalog</primary>
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</indexterm>
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<indexterm>
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<primary>current_database</primary>
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</indexterm>
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@ -11083,9 +11094,12 @@ postgres=# select * from unnest2(array[[1,2],[3,4]]);
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<note>
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<para>
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<function>current_user</function>, <function>session_user</function>, and
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<function>user</function> have special syntactic status in <acronym>SQL</acronym>:
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they must be called without trailing parentheses.
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<function>current_catalog</function>, <function>current_schema</function>,
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<function>current_user</function>, <function>session_user</function>,
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and <function>user</function> have special syntactic status
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in <acronym>SQL</acronym>: they must be called without trailing
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parentheses (optional in PostgreSQL in the case
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of <function>current_schema</function>).
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</para>
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</note>
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@ -1,5 +1,5 @@
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<!--
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$PostgreSQL: pgsql/doc/src/sgml/ref/set.sgml,v 1.92 2008/03/10 12:39:22 tgl Exp $
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$PostgreSQL: pgsql/doc/src/sgml/ref/set.sgml,v 1.93 2008/10/27 09:37:47 petere Exp $
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PostgreSQL documentation
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-->
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@ -150,6 +150,17 @@ SET [ SESSION | LOCAL ] TIME ZONE { <replaceable class="PARAMETER">timezone</rep
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special syntax:
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<variablelist>
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<varlistentry>
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<term><literal>SCHEMA</literal></term>
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<listitem>
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<para>
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<literal>SET SCHEMA '<replaceable>value</>'</> is an alias for
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<literal>SET search_path TO <replaceable>value</></>. Only one
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schema can be specified using this syntax.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><literal>NAMES</literal></term>
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<listitem>
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@ -295,8 +295,8 @@ F731 INSERT column privileges NO
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F741 Referential MATCH types NO no partial match yet
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F751 View CHECK enhancements NO
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F761 Session management YES
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F762 CURRENT_CATALOG NO same as current_database()
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F763 CURRENT_SCHEMA NO same as current_schema()
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F762 CURRENT_CATALOG YES
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F763 CURRENT_SCHEMA YES
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F771 Connection management YES
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F781 Self-referencing operations YES
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F791 Insensitive cursors YES
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@ -11,7 +11,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.629 2008/10/27 08:47:14 petere Exp $
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* $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.630 2008/10/27 09:37:47 petere Exp $
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*
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* HISTORY
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* AUTHOR DATE MAJOR EVENT
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@ -401,12 +401,13 @@ static TypeName *TableFuncTypeName(List *columns);
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BACKWARD BEFORE BEGIN_P BETWEEN BIGINT BINARY BIT
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BOOLEAN_P BOTH BY
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CACHE CALLED CASCADE CASCADED CASE CAST CHAIN CHAR_P
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CACHE CALLED CASCADE CASCADED CASE CAST CATALOG_P CHAIN CHAR_P
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CHARACTER CHARACTERISTICS CHECK CHECKPOINT CLASS CLOSE
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CLUSTER COALESCE COLLATE COLUMN COMMENT COMMIT
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COMMITTED CONCURRENTLY CONFIGURATION CONNECTION CONSTRAINT CONSTRAINTS
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CONTENT_P CONTINUE_P CONVERSION_P COPY COST CREATE CREATEDB
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CREATEROLE CREATEUSER CROSS CSV CTYPE CURRENT_P CURRENT_DATE CURRENT_ROLE
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CREATEROLE CREATEUSER CROSS CSV CTYPE CURRENT_P
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CURRENT_CATALOG CURRENT_DATE CURRENT_ROLE CURRENT_SCHEMA
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CURRENT_TIME CURRENT_TIMESTAMP CURRENT_USER CURSOR CYCLE
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DATA_P DATABASE DAY_P DEALLOCATE DEC DECIMAL_P DECLARE DEFAULT DEFAULTS
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@ -1133,6 +1134,22 @@ set_rest: /* Generic SET syntaxes: */
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n->args = $5;
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$$ = n;
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}
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| CATALOG_P Sconst
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{
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ereport(ERROR,
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(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
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errmsg("current database cannot be changed"),
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scanner_errposition(@2)));
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$$ = NULL; /*not reached*/
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}
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| SCHEMA Sconst
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{
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VariableSetStmt *n = makeNode(VariableSetStmt);
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n->kind = VAR_SET_VALUE;
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n->name = "search_path";
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n->args = list_make1(makeStringConst($2, @2));
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$$ = n;
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}
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| NAMES opt_encoding
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{
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VariableSetStmt *n = makeNode(VariableSetStmt);
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@ -8401,6 +8418,28 @@ func_expr: func_name '(' ')'
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n->location = @1;
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$$ = (Node *)n;
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}
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| CURRENT_CATALOG
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{
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FuncCall *n = makeNode(FuncCall);
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n->funcname = SystemFuncName("current_database");
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n->args = NIL;
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n->agg_star = FALSE;
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n->agg_distinct = FALSE;
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n->func_variadic = FALSE;
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n->location = @1;
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$$ = (Node *)n;
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}
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| CURRENT_SCHEMA
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{
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FuncCall *n = makeNode(FuncCall);
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n->funcname = SystemFuncName("current_schema");
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n->args = NIL;
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n->agg_star = FALSE;
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n->agg_distinct = FALSE;
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n->func_variadic = FALSE;
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n->location = @1;
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$$ = (Node *)n;
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}
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| CAST '(' a_expr AS Typename ')'
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{ $$ = makeTypeCast($3, $5, @1); }
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| EXTRACT '(' extract_list ')'
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@ -9336,6 +9375,7 @@ unreserved_keyword:
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| CALLED
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| CASCADE
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| CASCADED
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| CATALOG_P
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| CHAIN
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| CHARACTERISTICS
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| CHECKPOINT
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@ -9625,6 +9665,7 @@ type_func_name_keyword:
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| BETWEEN
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| BINARY
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| CROSS
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| CURRENT_SCHEMA
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| FREEZE
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| FULL
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| ILIKE
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@ -9667,6 +9708,7 @@ reserved_keyword:
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| COLUMN
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| CONSTRAINT
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| CREATE
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| CURRENT_CATALOG
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| CURRENT_DATE
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| CURRENT_ROLE
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| CURRENT_TIME
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@ -11,7 +11,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/parser/keywords.c,v 1.204 2008/10/22 11:00:34 petere Exp $
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* $PostgreSQL: pgsql/src/backend/parser/keywords.c,v 1.205 2008/10/27 09:37:47 petere Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -83,6 +83,7 @@ const ScanKeyword ScanKeywords[] = {
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{"cascaded", CASCADED, UNRESERVED_KEYWORD},
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{"case", CASE, RESERVED_KEYWORD},
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{"cast", CAST, RESERVED_KEYWORD},
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{"catalog", CATALOG_P, UNRESERVED_KEYWORD},
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{"chain", CHAIN, UNRESERVED_KEYWORD},
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{"char", CHAR_P, COL_NAME_KEYWORD},
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{"character", CHARACTER, COL_NAME_KEYWORD},
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{"csv", CSV, UNRESERVED_KEYWORD},
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{"ctype", CTYPE, UNRESERVED_KEYWORD},
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{"current", CURRENT_P, UNRESERVED_KEYWORD},
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{"current_catalog", CURRENT_CATALOG, RESERVED_KEYWORD},
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{"current_date", CURRENT_DATE, RESERVED_KEYWORD},
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{"current_role", CURRENT_ROLE, RESERVED_KEYWORD},
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{"current_schema", CURRENT_SCHEMA, TYPE_FUNC_NAME_KEYWORD},
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{"current_time", CURRENT_TIME, RESERVED_KEYWORD},
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{"current_timestamp", CURRENT_TIMESTAMP, RESERVED_KEYWORD},
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{"current_user", CURRENT_USER, RESERVED_KEYWORD},
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@ -1,4 +1,4 @@
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/* $PostgreSQL: pgsql/src/interfaces/ecpg/preproc/preproc.y,v 1.377 2008/10/21 08:38:16 petere Exp $ */
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/* $PostgreSQL: pgsql/src/interfaces/ecpg/preproc/preproc.y,v 1.378 2008/10/27 09:37:47 petere Exp $ */
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/* Copyright comment */
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%{
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@ -423,12 +423,13 @@ add_typedef(char *name, char * dimension, char * length, enum ECPGttype type_enu
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BACKWARD BEFORE BEGIN_P BETWEEN BIGINT BINARY BIT
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BOOLEAN_P BOTH BY
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CACHE CALLED CASCADE CASCADED CASE CAST CHAIN CHAR_P
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CACHE CALLED CASCADE CASCADED CASE CAST CATALOG_P CHAIN CHAR_P
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CHARACTER CHARACTERISTICS CHECK CHECKPOINT CLASS CLOSE
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CLUSTER COALESCE COLLATE COLUMN COMMENT COMMIT
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COMMITTED CONCURRENTLY CONFIGURATION CONNECTION CONSTRAINT CONSTRAINTS
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CONTENT_P CONTINUE_P CONVERSION_P COPY COST CREATE CREATEDB
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CREATEROLE CREATEUSER CROSS CSV CTYPE CURRENT_P CURRENT_DATE CURRENT_ROLE
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CREATEROLE CREATEUSER CROSS CSV CTYPE CURRENT_P
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CURRENT_CATALOG CURRENT_DATE CURRENT_ROLE CURRENT_SCHEMA
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CURRENT_TIME CURRENT_TIMESTAMP CURRENT_USER CURSOR CYCLE
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DATA_P DATABASE DAY_P DEALLOCATE DEC DECIMAL_P DECLARE DEFAULT DEFAULTS
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@ -1217,6 +1218,10 @@ set_rest: /* Generic SET syntaxes: */
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{ $$ = cat2_str(make_str("transaction"), $2); }
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| SESSION CHARACTERISTICS AS TRANSACTION transaction_mode_list
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{ $$ = cat2_str(make_str("session characteristics as transaction"), $5); }
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| CATALOG_P Sconst
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{ $$ = cat2_str(make_str("catalog"), $2); }
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| SCHEMA Sconst
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{ $$ = cat2_str(make_str("schema"), $2); }
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| NAMES opt_encoding
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{ $$ = cat2_str(make_str("names"), $2); }
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| ROLE ColId_or_Sconst
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@ -4469,6 +4474,10 @@ func_expr: func_name '(' ')'
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{ $$ = make_str("session_user"); }
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| USER
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{ $$ = make_str("user"); }
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| CURRENT_CATALOG
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{ $$ = make_str("current_catalog"); }
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| CURRENT_SCHEMA
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{ $$ = make_str("current_schema"); }
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| CAST '(' a_expr AS Typename ')'
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{ $$ = cat_str(5, make_str("cast("), $3, make_str("as"), $5, make_str(")")); }
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| EXTRACT '(' extract_list ')'
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@ -6867,10 +6876,12 @@ reserved_keyword:
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| CONSTRAINT { $$ = make_str("constraint"); }
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| CREATE { $$ = make_str("create"); }
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| CURRENT_P { $$ = make_str("current"); }
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| CURRENT_CATALOG { $$ = make_str("current_catalog"); }
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| CURRENT_DATE { $$ = make_str("current_date"); }
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| CURRENT_TIME { $$ = make_str("current_time"); }
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| CURRENT_TIMESTAMP { $$ = make_str("current_timestamp"); }
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| CURRENT_ROLE { $$ = make_str("current_role"); }
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| CURRENT_SCHEMA { $$ = make_str("current_schema"); }
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| CURRENT_USER { $$ = make_str("current_user"); }
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| DEFAULT { $$ = make_str("default"); }
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| DEFERRABLE { $$ = make_str("deferrable"); }
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