Change naming rule for ON SELECT rules of views: they're all just
_RETURN now, since there's no need to keep 'em unique anymore.
This commit is contained in:
Tom Lane
parent
201737168c
commit
6d6ca2166c
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@ -1,5 +1,5 @@
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<!--
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_rule.sgml,v 1.34 2002/04/19 16:36:08 tgl Exp $
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_rule.sgml,v 1.35 2002/04/19 23:13:53 tgl Exp $
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PostgreSQL documentation
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-->
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@ -268,12 +268,12 @@ CREATE
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report an error because the query cycled too many times:
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<programlisting>
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CREATE RULE "_RETemp" AS
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CREATE RULE "_RETURN" AS
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ON SELECT TO emp
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DO INSTEAD
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SELECT * FROM toyemp;
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CREATE RULE "_RETtoyemp" AS
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CREATE RULE "_RETURN" AS
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ON SELECT TO toyemp
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DO INSTEAD
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SELECT * FROM emp;
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@ -1,4 +1,4 @@
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<!-- $Header: /cvsroot/pgsql/doc/src/sgml/rules.sgml,v 1.22 2002/03/22 19:20:26 petere Exp $ -->
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<!-- $Header: /cvsroot/pgsql/doc/src/sgml/rules.sgml,v 1.23 2002/04/19 23:13:53 tgl Exp $ -->
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<Chapter Id="rules">
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<Title>The Rule System</Title>
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@ -289,7 +289,7 @@ CREATE VIEW myview AS SELECT * FROM mytab;
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<ProgramListing>
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CREATE TABLE myview (<Replaceable>same attribute list as for mytab</Replaceable>);
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CREATE RULE "_RETmyview" AS ON SELECT TO myview DO INSTEAD
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CREATE RULE "_RETURN" AS ON SELECT TO myview DO INSTEAD
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SELECT * FROM mytab;
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</ProgramListing>
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@ -517,7 +517,7 @@ SELECT shoelace.sl_name, shoelace.sl_avail,
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range table and checks if there are rules in <Filename>pg_rewrite</Filename>
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for any relation. When processing the range table entry for
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<Filename>shoelace</Filename> (the only one up to now) it finds the
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rule <literal>_RETshoelace</literal> with the parse tree
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<literal>_RETURN</literal> rule with the parse tree
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<ProgramListing>
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<emphasis>SELECT s.sl_name, s.sl_avail,
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@ -1494,7 +1494,7 @@ UPDATE shoelace_data SET
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Again it's an INSTEAD rule and the previous parse tree is trashed.
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Note that this query still uses the view <Filename>shoelace</Filename>.
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But the rule system isn't finished with this loop so it continues
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and applies the rule <literal>_RETshoelace</literal> on it and we get
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and applies the <literal>_RETURN</literal> rule on it and we get
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<ProgramListing>
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UPDATE shoelace_data SET
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@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/commands/tablecmds.c,v 1.4 2002/04/19 16:36:08 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/commands/tablecmds.c,v 1.5 2002/04/19 23:13:54 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -40,8 +40,6 @@
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#include "parser/parse_expr.h"
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#include "parser/parse_relation.h"
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#include "parser/parse_type.h"
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#include "rewrite/rewriteDefine.h"
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#include "rewrite/rewriteSupport.h"
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#include "utils/acl.h"
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#include "utils/builtins.h"
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#include "utils/fmgroids.h"
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@ -2814,19 +2812,6 @@ renamerel(Oid relid, const char *newrelname)
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if (relkind != RELKIND_INDEX)
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TypeRename(oldrelname, namespaceId, newrelname);
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/*
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* If it's a view, must also rename the associated ON SELECT rule.
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*/
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if (relkind == RELKIND_VIEW)
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{
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char *oldrulename,
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*newrulename;
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oldrulename = MakeRetrieveViewRuleName(oldrelname);
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newrulename = MakeRetrieveViewRuleName(newrelname);
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RenameRewriteRule(relid, oldrulename, newrulename);
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}
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/*
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* Update rel name in any RI triggers associated with the relation.
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*/
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@ -6,7 +6,7 @@
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* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $Id: view.c,v 1.62 2002/04/15 05:22:03 tgl Exp $
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* $Id: view.c,v 1.63 2002/04/19 23:13:54 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -99,17 +99,14 @@ static RuleStmt *
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FormViewRetrieveRule(const RangeVar *view, Query *viewParse)
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{
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RuleStmt *rule;
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char *rname;
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/*
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* Create a RuleStmt that corresponds to the suitable rewrite rule
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* args for DefineQueryRewrite();
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*/
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rname = MakeRetrieveViewRuleName(view->relname);
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rule = makeNode(RuleStmt);
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rule->relation = copyObject((RangeVar *) view);
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rule->rulename = pstrdup(rname);
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rule->rulename = pstrdup(ViewSelectRuleName);
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rule->whereClause = NULL;
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rule->event = CMD_SELECT;
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rule->instead = true;
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@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteDefine.c,v 1.67 2002/04/18 20:01:09 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteDefine.c,v 1.68 2002/04/19 23:13:54 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -176,7 +176,6 @@ DefineQueryRewrite(RuleStmt *stmt)
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{
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List *tllist;
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int i;
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char *expected_name;
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/*
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* So there cannot be INSTEAD NOTHING, ...
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@ -265,15 +264,26 @@ DefineQueryRewrite(RuleStmt *stmt)
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}
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/*
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* ... and finally the rule must be named _RETviewname.
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* ... and finally the rule must be named _RETURN.
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*/
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expected_name = MakeRetrieveViewRuleName(event_obj->relname);
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if (strcmp(expected_name, stmt->rulename) != 0)
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if (strcmp(stmt->rulename, ViewSelectRuleName) != 0)
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{
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elog(ERROR, "view rule for \"%s\" must be named \"%s\"",
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event_obj->relname, expected_name);
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/*
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* In versions before 7.3, the expected name was _RETviewname.
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* For backwards compatibility with old pg_dump output, accept
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* that and silently change it to _RETURN. Since this is just
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* a quick backwards-compatibility hack, limit the number of
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* characters checked to a few less than NAMEDATALEN; this
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* saves having to worry about where a multibyte character might
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* have gotten truncated.
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*/
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if (strncmp(stmt->rulename, "_RET", 4) != 0 ||
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strncmp(stmt->rulename + 4, event_obj->relname,
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NAMEDATALEN - 4 - 4) != 0)
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elog(ERROR, "view rule for \"%s\" must be named \"%s\"",
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event_obj->relname, ViewSelectRuleName);
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stmt->rulename = pstrdup(ViewSelectRuleName);
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}
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pfree(expected_name);
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/*
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* Are we converting a relation to a view?
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@ -418,9 +428,7 @@ setRuleCheckAsUser_walker(Node *node, Oid *context)
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/*
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* Rename an existing rewrite rule.
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*
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* There is not currently a user command to invoke this directly
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* (perhaps there should be). But we need it anyway to rename the
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* ON SELECT rule associated with a view, when the view is renamed.
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* This is unused code at the moment.
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*/
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void
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RenameRewriteRule(Oid owningRel, const char *oldName,
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@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteSupport.c,v 1.50 2002/04/18 20:01:09 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteSupport.c,v 1.51 2002/04/19 23:13:54 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -20,10 +20,6 @@
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#include "rewrite/rewriteSupport.h"
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#include "utils/syscache.h"
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#ifdef MULTIBYTE
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#include "mb/pg_wchar.h"
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#endif
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/*
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* Is there a rule by the given name?
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@ -37,35 +33,6 @@ IsDefinedRewriteRule(Oid owningRel, const char *ruleName)
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0, 0);
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}
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/*
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* makeViewRetrieveRuleName
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*
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* Given a view name, returns the name for the associated ON SELECT rule.
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*
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* XXX this is not the only place in the backend that knows about the _RET
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* name-forming convention.
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*/
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char *
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MakeRetrieveViewRuleName(const char *viewName)
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{
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char *buf;
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int buflen,
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maxlen;
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buflen = strlen(viewName) + 5;
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buf = palloc(buflen);
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snprintf(buf, buflen, "_RET%s", viewName);
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/* clip to less than NAMEDATALEN bytes, if necessary */
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#ifdef MULTIBYTE
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maxlen = pg_mbcliplen(buf, strlen(buf), NAMEDATALEN - 1);
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#else
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maxlen = NAMEDATALEN - 1;
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#endif
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if (maxlen < buflen)
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buf[maxlen] = '\0';
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return buf;
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}
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/*
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* SetRelationRuleStatus
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@ -3,7 +3,7 @@
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* back to source text
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/ruleutils.c,v 1.97 2002/04/18 20:01:09 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/ruleutils.c,v 1.98 2002/04/19 23:13:54 tgl Exp $
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*
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* This software is copyrighted by Jan Wieck - Hamburg.
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*
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@ -283,7 +283,6 @@ pg_do_getviewdef(Oid viewoid)
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StringInfoData buf;
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int len;
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char *viewname;
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char *name;
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/*
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* Connect to SPI manager
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@ -313,9 +312,8 @@ pg_do_getviewdef(Oid viewoid)
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* Get the pg_rewrite tuple for the view's SELECT rule
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*/
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viewname = get_rel_name(viewoid);
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name = MakeRetrieveViewRuleName(viewname);
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args[0] = ObjectIdGetDatum(viewoid);
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args[1] = PointerGetDatum(name);
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args[1] = PointerGetDatum(ViewSelectRuleName);
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nulls[0] = ' ';
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nulls[1] = ' ';
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spirc = SPI_execp(plan_getviewrule, args, nulls, 2);
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@ -338,7 +336,6 @@ pg_do_getviewdef(Oid viewoid)
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VARATT_SIZEP(ruledef) = len;
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memcpy(VARDATA(ruledef), buf.data, buf.len);
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pfree(buf.data);
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pfree(name);
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/*
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* Disconnect from SPI manager
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@ -27,7 +27,7 @@
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# Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
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# Portions Copyright (c) 1994, Regents of the University of California
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#
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# $Header: /cvsroot/pgsql/src/bin/initdb/Attic/initdb.sh,v 1.149 2002/04/18 20:01:10 tgl Exp $
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# $Header: /cvsroot/pgsql/src/bin/initdb/Attic/initdb.sh,v 1.150 2002/04/19 23:13:54 tgl Exp $
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#
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#-------------------------------------------------------------------------
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@ -695,7 +695,7 @@ CREATE VIEW pg_rules AS \
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pg_get_ruledef(R.oid) AS definition \
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FROM (pg_rewrite R JOIN pg_class C ON (C.oid = R.ev_class)) \
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LEFT JOIN pg_namespace N ON (N.oid = C.relnamespace) \
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WHERE R.rulename !~ '^_RET';
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WHERE R.rulename != '_RETURN';
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CREATE VIEW pg_views AS \
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SELECT \
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@ -22,7 +22,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/bin/pg_dump/pg_dump.c,v 1.249 2002/04/18 20:01:10 tgl Exp $
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* $Header: /cvsroot/pgsql/src/bin/pg_dump/pg_dump.c,v 1.250 2002/04/19 23:13:54 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -2291,10 +2291,8 @@ getTables(int *numTables, FuncInfo *finfo, int numFuncs, const char *tablename)
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"oid as view_oid"
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" from pg_rewrite where"
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" ev_class = '%s'::oid and"
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" rulename = ('_RET' || ",
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" rulename = '_RETURN';",
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tblinfo[i].oid);
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formatStringLiteral(query, tblinfo[i].relname, CONV_ALL);
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appendPQExpBuffer(query, ")::name;");
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}
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res2 = PQexec(g_conn, query->data);
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@ -5006,7 +5004,7 @@ dumpRules(Archive *fout, const char *tablename,
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continue;
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/*
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* Get all rules defined for this table
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* Get all rules defined for this table, except view select rules
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*/
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resetPQExpBuffer(query);
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@ -5036,7 +5034,7 @@ dumpRules(Archive *fout, const char *tablename,
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"FROM pg_rewrite, pg_class "
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"WHERE pg_class.oid = '%s'::oid "
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" AND pg_rewrite.ev_class = pg_class.oid "
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" AND pg_rewrite.rulename !~ '^_RET' "
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" AND pg_rewrite.rulename != '_RETURN' "
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"ORDER BY pg_rewrite.oid",
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tblinfo[t].oid);
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}
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@ -3,7 +3,7 @@
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*
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* Copyright 2000 by PostgreSQL Global Development Group
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*
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* $Header: /cvsroot/pgsql/src/bin/psql/describe.c,v 1.49 2002/04/11 20:00:08 tgl Exp $
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* $Header: /cvsroot/pgsql/src/bin/psql/describe.c,v 1.50 2002/04/19 23:13:54 tgl Exp $
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*/
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#include "postgres_fe.h"
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#include "describe.h"
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@ -385,9 +385,9 @@ objectDescription(const char *object)
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/* Rule description (ignore rules for views) */
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"UNION ALL\n"
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" SELECT r.oid as oid, r.tableoid as tableoid,\n"
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" CAST(r.rulename AS text) as name, CAST('%s' AS text) as object\n"
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" CAST(r.rulename AS text) as name, CAST('%s' AS text) as object\n"
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" FROM pg_rewrite r\n"
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" WHERE r.rulename !~ '^_RET'\n"
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" WHERE r.rulename != '_RETURN'\n"
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/* Trigger description */
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"UNION ALL\n"
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@ -704,8 +704,8 @@ describeTableDetails(const char *name, bool desc)
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sprintf(buf,
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"SELECT r.rulename\n"
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"FROM pg_rewrite r, pg_class c\n"
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"WHERE c.relname='%s' AND c.oid = r.ev_class\n"
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"AND r.rulename NOT LIKE '_RET%%'",
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"WHERE c.relname = '%s' AND c.oid = r.ev_class\n"
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"AND r.rulename != '_RETURN'",
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name);
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result = PSQLexec(buf);
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if (!result)
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@ -37,7 +37,7 @@
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* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $Id: catversion.h,v 1.119 2002/04/19 16:36:08 tgl Exp $
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* $Id: catversion.h,v 1.120 2002/04/19 23:13:54 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -53,6 +53,6 @@
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*/
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/* yyyymmddN */
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#define CATALOG_VERSION_NO 200204182
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#define CATALOG_VERSION_NO 200204191
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#endif
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@ -7,16 +7,17 @@
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* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $Id: rewriteSupport.h,v 1.21 2002/04/18 20:01:11 tgl Exp $
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* $Id: rewriteSupport.h,v 1.22 2002/04/19 23:13:54 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef REWRITESUPPORT_H
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#define REWRITESUPPORT_H
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extern bool IsDefinedRewriteRule(Oid owningRel, const char *ruleName);
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/* The ON SELECT rule of a view is always named this: */
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#define ViewSelectRuleName "_RETURN"
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extern char *MakeRetrieveViewRuleName(const char *view_name);
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extern bool IsDefinedRewriteRule(Oid owningRel, const char *ruleName);
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extern void SetRelationRuleStatus(Oid relationId, bool relHasRules,
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bool relIsBecomingView);
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|
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@ -1268,7 +1268,7 @@ SELECT viewname, definition FROM pg_views ORDER BY viewname;
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--------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
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iexit | SELECT ih.name, ih.thepath, interpt_pp(ih.thepath, r.thepath) AS exit FROM ihighway ih, ramp r WHERE (ih.thepath ## r.thepath);
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pg_indexes | SELECT c.relname AS tablename, i.relname AS indexname, pg_get_indexdef(x.indexrelid) AS indexdef FROM pg_index x, pg_class c, pg_class i WHERE ((((c.relkind = 'r'::"char") AND (i.relkind = 'i'::"char")) AND (c.oid = x.indrelid)) AND (i.oid = x.indexrelid));
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pg_rules | SELECT n.nspname AS schemaname, c.relname AS tablename, r.rulename, pg_get_ruledef(r.oid) AS definition FROM ((pg_rewrite r JOIN pg_class c ON ((c.oid = r.ev_class))) LEFT JOIN pg_namespace n ON ((n.oid = c.relnamespace))) WHERE (r.rulename !~ '^_RET'::text);
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pg_rules | SELECT n.nspname AS schemaname, c.relname AS tablename, r.rulename, pg_get_ruledef(r.oid) AS definition FROM ((pg_rewrite r JOIN pg_class c ON ((c.oid = r.ev_class))) LEFT JOIN pg_namespace n ON ((n.oid = c.relnamespace))) WHERE (r.rulename <> '_RETURN'::name);
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pg_stat_activity | SELECT d.oid AS datid, d.datname, pg_stat_get_backend_pid(s.backendid) AS procpid, pg_stat_get_backend_userid(s.backendid) AS usesysid, u.usename, pg_stat_get_backend_activity(s.backendid) AS current_query FROM pg_database d, (SELECT pg_stat_get_backend_idset() AS backendid) s, pg_shadow u WHERE ((pg_stat_get_backend_dbid(s.backendid) = d.oid) AND (pg_stat_get_backend_userid(s.backendid) = u.usesysid));
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pg_stat_all_indexes | SELECT c.oid AS relid, i.oid AS indexrelid, c.relname, i.relname AS indexrelname, pg_stat_get_numscans(i.oid) AS idx_scan, pg_stat_get_tuples_returned(i.oid) AS idx_tup_read, pg_stat_get_tuples_fetched(i.oid) AS idx_tup_fetch FROM pg_class c, pg_class i, pg_index x WHERE (((c.relkind = 'r'::"char") AND (x.indrelid = c.oid)) AND (x.indexrelid = i.oid));
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pg_stat_all_tables | SELECT c.oid AS relid, c.relname, pg_stat_get_numscans(c.oid) AS seq_scan, pg_stat_get_tuples_returned(c.oid) AS seq_tup_read, sum(pg_stat_get_numscans(i.indexrelid)) AS idx_scan, sum(pg_stat_get_tuples_fetched(i.indexrelid)) AS idx_tup_fetch, pg_stat_get_tuples_inserted(c.oid) AS n_tup_ins, pg_stat_get_tuples_updated(c.oid) AS n_tup_upd, pg_stat_get_tuples_deleted(c.oid) AS n_tup_del FROM (pg_class c LEFT JOIN pg_index i ON ((c.oid = i.indrelid))) WHERE (c.relkind = 'r'::"char") GROUP BY c.oid, c.relname;
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Reference in New Issue