mirror of
https://github.com/postgres/postgres.git
synced 2025-06-27 23:21:58 +03:00
Massive commit to run PGINDENT on all *.c and *.h files.
This commit is contained in:
Bruce Momjian
@ -1,17 +1,17 @@
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/*-------------------------------------------------------------------------
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*
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* view.c--
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* use rewrite rules to construct views
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* use rewrite rules to construct views
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*
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* Copyright (c) 1994, Regents of the University of California
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/commands/view.c,v 1.8 1997/08/22 14:22:14 vadim Exp $
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* $Header: /cvsroot/pgsql/src/backend/commands/view.c,v 1.9 1997/09/07 04:41:06 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#include <stdio.h> /* for sprintf() */
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#include <stdio.h> /* for sprintf() */
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#include <string.h>
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#include <postgres.h>
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@ -42,69 +42,74 @@
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*---------------------------------------------------------------------
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*/
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static void
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DefineVirtualRelation(char *relname, List *tlist)
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DefineVirtualRelation(char *relname, List * tlist)
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{
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CreateStmt createStmt;
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List *attrList, *t;
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TargetEntry *entry;
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Resdom *res;
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char *resname;
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char *restypename;
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/*
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* create a list with one entry per attribute of this relation.
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* Each entry is a two element list. The first element is the
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* name of the attribute (a string) and the second the name of the type
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* (NOTE: a string, not a type id!).
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*/
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attrList = NIL;
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if (tlist!=NIL) {
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foreach (t, tlist ) {
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ColumnDef *def = makeNode(ColumnDef);
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TypeName *typename;
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CreateStmt createStmt;
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List *attrList,
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*t;
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TargetEntry *entry;
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Resdom *res;
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char *resname;
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char *restypename;
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/*
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* find the names of the attribute & its type
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*/
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entry = lfirst(t);
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res = entry->resdom;
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resname = res->resname;
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restypename = tname(get_id_type(res->restype));
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/*
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* create a list with one entry per attribute of this relation. Each
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* entry is a two element list. The first element is the name of the
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* attribute (a string) and the second the name of the type (NOTE: a
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* string, not a type id!).
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*/
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attrList = NIL;
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if (tlist != NIL)
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{
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foreach(t, tlist)
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{
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ColumnDef *def = makeNode(ColumnDef);
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TypeName *typename;
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typename = makeNode(TypeName);
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/*
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* find the names of the attribute & its type
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*/
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entry = lfirst(t);
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res = entry->resdom;
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resname = res->resname;
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restypename = tname(get_id_type(res->restype));
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typename->name = pstrdup(restypename);
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def->colname = pstrdup(resname);
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typename = makeNode(TypeName);
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def->typename = typename;
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def->is_not_null = false;
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def->defval = (char*) NULL;
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typename->name = pstrdup(restypename);
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def->colname = pstrdup(resname);
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attrList = lappend(attrList, def);
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def->typename = typename;
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def->is_not_null = false;
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def->defval = (char *) NULL;
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attrList = lappend(attrList, def);
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}
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}
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else
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{
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elog(WARN, "attempted to define virtual relation with no attrs");
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}
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} else {
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elog ( WARN, "attempted to define virtual relation with no attrs");
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}
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/*
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* now create the parametesr for keys/inheritance etc.
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* All of them are nil...
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*/
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createStmt.relname = relname;
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createStmt.tableElts = attrList;
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/* createStmt.tableType = NULL;*/
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createStmt.inhRelnames = NIL;
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createStmt.archiveType = ARCH_NONE;
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createStmt.location = -1;
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createStmt.archiveLoc = -1;
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createStmt.constraints = NIL;
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/*
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* finally create the relation...
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*/
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DefineRelation(&createStmt);
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}
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/*
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* now create the parametesr for keys/inheritance etc. All of them are
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* nil...
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*/
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createStmt.relname = relname;
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createStmt.tableElts = attrList;
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/* createStmt.tableType = NULL;*/
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createStmt.inhRelnames = NIL;
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createStmt.archiveType = ARCH_NONE;
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createStmt.location = -1;
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createStmt.archiveLoc = -1;
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createStmt.constraints = NIL;
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/*
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* finally create the relation...
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*/
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DefineRelation(&createStmt);
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}
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/*------------------------------------------------------------------
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* makeViewRetrieveRuleName
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@ -118,84 +123,87 @@ DefineVirtualRelation(char *relname, List *tlist)
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* XXX it also means viewName cannot be 16 chars long! - ay 11/94
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*------------------------------------------------------------------
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*/
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char *
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char *
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MakeRetrieveViewRuleName(char *viewName)
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{
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/*
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char buf[100];
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char buf[100];
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memset(buf, 0, sizeof(buf));
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sprintf(buf, "_RET%.*s", NAMEDATALEN, viewName->data);
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buf[15] = '\0';
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namestrcpy(rule_name, buf);
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memset(buf, 0, sizeof(buf));
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sprintf(buf, "_RET%.*s", NAMEDATALEN, viewName->data);
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buf[15] = '\0';
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namestrcpy(rule_name, buf);
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*/
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char *buf;
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buf = palloc(strlen(viewName) + 5);
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sprintf(buf, "_RET%s",viewName);
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return buf;
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char *buf;
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buf = palloc(strlen(viewName) + 5);
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sprintf(buf, "_RET%s", viewName);
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return buf;
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}
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static RuleStmt *
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FormViewRetrieveRule(char *viewName, Query *viewParse)
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FormViewRetrieveRule(char *viewName, Query * viewParse)
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{
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RuleStmt *rule;
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char *rname;
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Attr *attr;
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/*
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* Create a RuleStmt that corresponds to the suitable
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* rewrite rule args for DefineQueryRewrite();
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*/
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rule = makeNode(RuleStmt);
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rname = MakeRetrieveViewRuleName(viewName);
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RuleStmt *rule;
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char *rname;
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Attr *attr;
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attr = makeNode(Attr);
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attr->relname = pstrdup(viewName);
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/* attr->refname = pstrdup(viewName);*/
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rule->rulename = pstrdup(rname);
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rule->whereClause = NULL;
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rule->event = CMD_SELECT;
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rule->object = attr;
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rule->instead = true;
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rule->actions = lcons(viewParse, NIL);
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return rule;
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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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rule = makeNode(RuleStmt);
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rname = MakeRetrieveViewRuleName(viewName);
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attr = makeNode(Attr);
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attr->relname = pstrdup(viewName);
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/* attr->refname = pstrdup(viewName);*/
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rule->rulename = pstrdup(rname);
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rule->whereClause = NULL;
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rule->event = CMD_SELECT;
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rule->object = attr;
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rule->instead = true;
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rule->actions = lcons(viewParse, NIL);
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return rule;
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}
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static void
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DefineViewRules(char *viewName, Query *viewParse)
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DefineViewRules(char *viewName, Query * viewParse)
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{
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RuleStmt *retrieve_rule = NULL;
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#ifdef NOTYET
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RuleStmt *replace_rule = NULL;
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RuleStmt *append_rule = NULL;
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RuleStmt *delete_rule = NULL;
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#endif
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retrieve_rule =
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FormViewRetrieveRule(viewName, viewParse);
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#ifdef NOTYET
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replace_rule =
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FormViewReplaceRule(viewName, viewParse);
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append_rule =
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FormViewAppendRule(viewName, viewParse);
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delete_rule =
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FormViewDeleteRule(viewName, viewParse);
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#endif
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DefineQueryRewrite(retrieve_rule);
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RuleStmt *retrieve_rule = NULL;
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#ifdef NOTYET
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DefineQueryRewrite(replace_rule);
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DefineQueryRewrite(append_rule);
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DefineQueryRewrite(delete_rule);
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RuleStmt *replace_rule = NULL;
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RuleStmt *append_rule = NULL;
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RuleStmt *delete_rule = NULL;
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#endif
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}
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retrieve_rule =
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FormViewRetrieveRule(viewName, viewParse);
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#ifdef NOTYET
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replace_rule =
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FormViewReplaceRule(viewName, viewParse);
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append_rule =
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FormViewAppendRule(viewName, viewParse);
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delete_rule =
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FormViewDeleteRule(viewName, viewParse);
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#endif
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DefineQueryRewrite(retrieve_rule);
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#ifdef NOTYET
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DefineQueryRewrite(replace_rule);
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DefineQueryRewrite(append_rule);
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DefineQueryRewrite(delete_rule);
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#endif
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}
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/*---------------------------------------------------------------
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* UpdateRangeTableOfViewParse
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@ -216,88 +224,84 @@ DefineViewRules(char *viewName, Query *viewParse)
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*---------------------------------------------------------------
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*/
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static void
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UpdateRangeTableOfViewParse(char *viewName, Query *viewParse)
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UpdateRangeTableOfViewParse(char *viewName, Query * viewParse)
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{
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List *old_rt;
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List *new_rt;
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RangeTblEntry *rt_entry1, *rt_entry2;
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/*
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* first offset all var nodes by 2
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*/
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OffsetVarNodes((Node*)viewParse->targetList, 2);
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OffsetVarNodes(viewParse->qual, 2);
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/*
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* find the old range table...
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*/
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old_rt = viewParse->rtable;
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List *old_rt;
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List *new_rt;
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RangeTblEntry *rt_entry1,
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*rt_entry2;
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/*
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* create the 2 new range table entries and form the new
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* range table...
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* CURRENT first, then NEW....
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*/
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rt_entry1 =
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addRangeTableEntry(NULL, (char*)viewName, "*CURRENT*",
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FALSE, FALSE, NULL);
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rt_entry2 =
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addRangeTableEntry(NULL, (char*)viewName, "*NEW*",
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FALSE, FALSE, NULL);
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new_rt = lcons(rt_entry2, old_rt);
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new_rt = lcons(rt_entry1, new_rt);
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/*
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* Now the tricky part....
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* Update the range table in place... Be careful here, or
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* hell breaks loooooooooooooOOOOOOOOOOOOOOOOOOSE!
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*/
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viewParse->rtable = new_rt;
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/*
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* first offset all var nodes by 2
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*/
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OffsetVarNodes((Node *) viewParse->targetList, 2);
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OffsetVarNodes(viewParse->qual, 2);
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/*
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* find the old range table...
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*/
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old_rt = viewParse->rtable;
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/*
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* create the 2 new range table entries and form the new range
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* table... CURRENT first, then NEW....
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*/
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rt_entry1 =
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addRangeTableEntry(NULL, (char *) viewName, "*CURRENT*",
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FALSE, FALSE, NULL);
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rt_entry2 =
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addRangeTableEntry(NULL, (char *) viewName, "*NEW*",
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FALSE, FALSE, NULL);
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new_rt = lcons(rt_entry2, old_rt);
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new_rt = lcons(rt_entry1, new_rt);
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/*
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* Now the tricky part.... Update the range table in place... Be
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* careful here, or hell breaks loooooooooooooOOOOOOOOOOOOOOOOOOSE!
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*/
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viewParse->rtable = new_rt;
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}
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/*-------------------------------------------------------------------
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* DefineView
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*
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* - takes a "viewname", "parsetree" pair and then
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* 1) construct the "virtual" relation
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* 2) commit the command but NOT the transaction,
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* so that the relation exists
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* before the rules are defined.
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* 2) define the "n" rules specified in the PRS2 paper
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* over the "virtual" relation
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* - takes a "viewname", "parsetree" pair and then
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* 1) construct the "virtual" relation
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* 2) commit the command but NOT the transaction,
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* so that the relation exists
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* before the rules are defined.
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* 2) define the "n" rules specified in the PRS2 paper
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* over the "virtual" relation
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*-------------------------------------------------------------------
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*/
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void
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DefineView(char *viewName, Query *viewParse)
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DefineView(char *viewName, Query * viewParse)
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{
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List *viewTlist;
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List *viewTlist;
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viewTlist = viewParse->targetList;
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/*
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* Create the "view" relation
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* NOTE: if it already exists, the xaxt will be aborted.
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*/
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DefineVirtualRelation(viewName, viewTlist);
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/*
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* The relation we have just created is not visible
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* to any other commands running with the same transaction &
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* command id.
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* So, increment the command id counter (but do NOT pfree any
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* memory!!!!)
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*/
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CommandCounterIncrement();
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/*
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* The range table of 'viewParse' does not contain entries
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* for the "CURRENT" and "NEW" relations.
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* So... add them!
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* NOTE: we make the update in place! After this call 'viewParse'
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* will never be what it used to be...
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*/
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UpdateRangeTableOfViewParse(viewName, viewParse);
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DefineViewRules(viewName, viewParse);
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viewTlist = viewParse->targetList;
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/*
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* Create the "view" relation NOTE: if it already exists, the xaxt
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* will be aborted.
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*/
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DefineVirtualRelation(viewName, viewTlist);
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/*
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* The relation we have just created is not visible to any other
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* commands running with the same transaction & command id. So,
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* increment the command id counter (but do NOT pfree any memory!!!!)
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*/
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CommandCounterIncrement();
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/*
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* The range table of 'viewParse' does not contain entries for the
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* "CURRENT" and "NEW" relations. So... add them! NOTE: we make the
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* update in place! After this call 'viewParse' will never be what it
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* used to be...
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*/
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UpdateRangeTableOfViewParse(viewName, viewParse);
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DefineViewRules(viewName, viewParse);
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}
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/*------------------------------------------------------------------
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||||
@ -309,23 +313,22 @@ DefineView(char *viewName, Query *viewParse)
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void
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RemoveView(char *viewName)
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{
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||||
char* rname;
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||||
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||||
/*
|
||||
* first remove all the "view" rules...
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||||
* Currently we only have one!
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||||
*/
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rname = MakeRetrieveViewRuleName(viewName);
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RemoveRewriteRule(rname);
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char *rname;
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||||
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/*
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* we don't really need that, but just in case...
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*/
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CommandCounterIncrement();
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/*
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* now remove the relation.
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||||
*/
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heap_destroy(viewName);
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pfree(rname);
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/*
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* first remove all the "view" rules... Currently we only have one!
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||||
*/
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||||
rname = MakeRetrieveViewRuleName(viewName);
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RemoveRewriteRule(rname);
|
||||
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||||
/*
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||||
* we don't really need that, but just in case...
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*/
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||||
CommandCounterIncrement();
|
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/*
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* now remove the relation.
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||||
*/
|
||||
heap_destroy(viewName);
|
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pfree(rname);
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user