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DROP RULE and COMMENT ON RULE syntax adds an 'ON tablename' clause, similar to TRIGGER syntaxes. To allow loading of existing pg_dump files containing COMMENT ON RULE, the COMMENT code will still accept the old syntax --- but only if the target rulename is unique across the whole database.
825 lines
19 KiB
C
825 lines
19 KiB
C
/*-------------------------------------------------------------------------
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*
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* utility.c
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* Contains functions which control the execution of the POSTGRES utility
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* commands. At one time acted as an interface between the Lisp and C
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* systems.
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*
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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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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/tcop/utility.c,v 1.150 2002/04/18 20:01:09 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include "access/heapam.h"
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#include "catalog/catalog.h"
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#include "catalog/namespace.h"
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#include "catalog/pg_shadow.h"
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#include "commands/async.h"
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#include "commands/cluster.h"
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#include "commands/comment.h"
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#include "commands/copy.h"
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#include "commands/dbcommands.h"
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#include "commands/defrem.h"
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#include "commands/explain.h"
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#include "commands/lockcmds.h"
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#include "commands/portalcmds.h"
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#include "commands/proclang.h"
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#include "commands/schemacmds.h"
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#include "commands/sequence.h"
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#include "commands/tablecmds.h"
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#include "commands/trigger.h"
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#include "commands/user.h"
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#include "commands/vacuum.h"
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#include "commands/variable.h"
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#include "commands/view.h"
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#include "miscadmin.h"
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#include "nodes/makefuncs.h"
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#include "parser/parse.h"
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#include "parser/parse_clause.h"
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#include "parser/parse_expr.h"
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#include "parser/parse_type.h"
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#include "rewrite/rewriteDefine.h"
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#include "rewrite/rewriteRemove.h"
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#include "tcop/utility.h"
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#include "utils/acl.h"
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#include "utils/lsyscache.h"
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#include "utils/syscache.h"
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#include "access/xlog.h"
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/*
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* Error-checking support for DROP commands
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*/
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struct kindstrings
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{
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char kind;
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char *indef_article;
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char *name;
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char *command;
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};
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static struct kindstrings kindstringarray[] = {
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{RELKIND_RELATION, "a", "table", "TABLE"},
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{RELKIND_SEQUENCE, "a", "sequence", "SEQUENCE"},
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{RELKIND_VIEW, "a", "view", "VIEW"},
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{RELKIND_INDEX, "an", "index", "INDEX"},
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{'\0', "a", "???", "???"}
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};
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static void
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DropErrorMsg(char *relname, char wrongkind, char rightkind)
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{
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struct kindstrings *rentry;
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struct kindstrings *wentry;
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for (rentry = kindstringarray; rentry->kind != '\0'; rentry++)
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if (rentry->kind == rightkind)
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break;
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Assert(rentry->kind != '\0');
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for (wentry = kindstringarray; wentry->kind != '\0'; wentry++)
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if (wentry->kind == wrongkind)
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break;
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/* wrongkind could be something we don't have in our table... */
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if (wentry->kind != '\0')
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elog(ERROR, "\"%s\" is not %s %s. Use DROP %s to remove %s %s",
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relname, rentry->indef_article, rentry->name,
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wentry->command, wentry->indef_article, wentry->name);
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else
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elog(ERROR, "\"%s\" is not %s %s",
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relname, rentry->indef_article, rentry->name);
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}
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static void
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CheckDropPermissions(RangeVar *rel, char rightkind)
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{
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struct kindstrings *rentry;
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Oid relOid;
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HeapTuple tuple;
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Form_pg_class classform;
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for (rentry = kindstringarray; rentry->kind != '\0'; rentry++)
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if (rentry->kind == rightkind)
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break;
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Assert(rentry->kind != '\0');
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relOid = RangeVarGetRelid(rel, true);
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if (!OidIsValid(relOid))
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elog(ERROR, "%s \"%s\" does not exist", rentry->name, rel->relname);
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tuple = SearchSysCache(RELOID,
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ObjectIdGetDatum(relOid),
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0, 0, 0);
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if (!HeapTupleIsValid(tuple))
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elog(ERROR, "%s \"%s\" does not exist", rentry->name, rel->relname);
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classform = (Form_pg_class) GETSTRUCT(tuple);
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if (classform->relkind != rightkind)
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DropErrorMsg(rel->relname, classform->relkind, rightkind);
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if (!pg_class_ownercheck(relOid, GetUserId()))
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elog(ERROR, "you do not own %s \"%s\"",
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rentry->name, rel->relname);
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if (!allowSystemTableMods && IsSystemClass(classform))
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elog(ERROR, "%s \"%s\" is a system %s",
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rentry->name, rel->relname, rentry->name);
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ReleaseSysCache(tuple);
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}
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static void
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CheckOwnership(RangeVar *rel, bool noCatalogs)
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{
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Oid relOid;
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HeapTuple tuple;
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relOid = RangeVarGetRelid(rel, false);
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tuple = SearchSysCache(RELOID,
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ObjectIdGetDatum(relOid),
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0, 0, 0);
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if (!HeapTupleIsValid(tuple))
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elog(ERROR, "Relation \"%s\" does not exist", rel->relname);
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if (!pg_class_ownercheck(relOid, GetUserId()))
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elog(ERROR, "%s: %s", rel->relname,
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aclcheck_error_strings[ACLCHECK_NOT_OWNER]);
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if (noCatalogs)
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{
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if (!allowSystemTableMods &&
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IsSystemClass((Form_pg_class) GETSTRUCT(tuple)))
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elog(ERROR, "relation \"%s\" is a system catalog",
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rel->relname);
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}
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ReleaseSysCache(tuple);
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}
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/*
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* ProcessUtility
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* general utility function invoker
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*
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* parsetree: the parse tree for the utility statement
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* dest: where to send results
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* completionTag: points to a buffer of size COMPLETION_TAG_BUFSIZE
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* in which to store a command completion status string.
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*
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* completionTag is only set nonempty if we want to return a nondefault
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* status (currently, only used for MOVE/FETCH).
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*
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* completionTag may be NULL if caller doesn't want a status string.
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*/
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void
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ProcessUtility(Node *parsetree,
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CommandDest dest,
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char *completionTag)
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{
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char *relname;
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if (completionTag)
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completionTag[0] = '\0';
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switch (nodeTag(parsetree))
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{
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/*
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* ******************************** transactions ********************************
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*
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*/
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case T_TransactionStmt:
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{
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TransactionStmt *stmt = (TransactionStmt *) parsetree;
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switch (stmt->command)
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{
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case BEGIN_TRANS:
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BeginTransactionBlock();
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break;
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case COMMIT:
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EndTransactionBlock();
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break;
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case ROLLBACK:
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UserAbortTransactionBlock();
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break;
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}
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}
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break;
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/*
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* ******************************** portal manipulation ********************************
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*
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*/
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case T_ClosePortalStmt:
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{
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ClosePortalStmt *stmt = (ClosePortalStmt *) parsetree;
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PerformPortalClose(stmt->portalname, dest);
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}
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break;
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case T_FetchStmt:
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{
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FetchStmt *stmt = (FetchStmt *) parsetree;
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char *portalName = stmt->portalname;
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bool forward;
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int count;
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SetQuerySnapshot();
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forward = (bool) (stmt->direction == FORWARD);
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/*
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* parser ensures that count is >= 0 and 'fetch ALL' -> 0
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*/
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count = stmt->howMany;
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PerformPortalFetch(portalName, forward, count,
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(stmt->ismove) ? None : dest,
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completionTag);
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}
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break;
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/*
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* relation and attribute manipulation
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*/
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case T_CreateSchemaStmt:
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{
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CreateSchemaStmt *stmt = (CreateSchemaStmt *) parsetree;
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CreateSchemaCommand(stmt);
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}
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break;
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case T_CreateStmt:
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{
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Oid relOid;
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relOid = DefineRelation((CreateStmt *) parsetree,
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RELKIND_RELATION);
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/*
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* Let AlterTableCreateToastTable decide if this one needs a
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* secondary relation too.
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*/
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CommandCounterIncrement();
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AlterTableCreateToastTable(relOid, true);
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}
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break;
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case T_DropStmt:
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{
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DropStmt *stmt = (DropStmt *) parsetree;
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List *arg;
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foreach(arg, stmt->objects)
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{
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List *names = (List *) lfirst(arg);
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RangeVar *rel;
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switch (stmt->removeType)
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{
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case DROP_TABLE:
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rel = makeRangeVarFromNameList(names);
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CheckDropPermissions(rel, RELKIND_RELATION);
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RemoveRelation(rel);
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break;
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case DROP_SEQUENCE:
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rel = makeRangeVarFromNameList(names);
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CheckDropPermissions(rel, RELKIND_SEQUENCE);
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RemoveRelation(rel);
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break;
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case DROP_VIEW:
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rel = makeRangeVarFromNameList(names);
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CheckDropPermissions(rel, RELKIND_VIEW);
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RemoveView(rel);
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break;
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case DROP_INDEX:
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rel = makeRangeVarFromNameList(names);
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CheckDropPermissions(rel, RELKIND_INDEX);
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RemoveIndex(rel);
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break;
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case DROP_TYPE:
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/* RemoveType does its own permissions checks */
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RemoveType(names);
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break;
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case DROP_DOMAIN:
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/* RemoveDomain does its own permissions checks */
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RemoveDomain(names, stmt->behavior);
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break;
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}
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/*
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* Make sure subsequent loop iterations will see
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* results of this one; needed if removing multiple
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* rules for same table, for example.
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*/
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CommandCounterIncrement();
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}
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}
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break;
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case T_TruncateStmt:
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{
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TruncateStmt *stmt = (TruncateStmt *) parsetree;
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TruncateRelation(stmt->relation);
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}
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break;
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case T_CommentStmt:
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CommentObject((CommentStmt *) parsetree);
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break;
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case T_CopyStmt:
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{
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CopyStmt *stmt = (CopyStmt *) parsetree;
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if (stmt->direction != FROM)
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SetQuerySnapshot();
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DoCopy(stmt->relation,
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stmt->binary,
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stmt->oids,
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(bool) (stmt->direction == FROM),
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(bool) (stmt->filename == NULL),
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/*
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* null filename means copy to/from stdout/stdin, rather
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* than to/from a file.
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*/
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stmt->filename,
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stmt->delimiter,
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stmt->null_print);
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}
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break;
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/*
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* schema
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*/
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case T_RenameStmt:
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{
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RenameStmt *stmt = (RenameStmt *) parsetree;
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CheckOwnership(stmt->relation, true);
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if (stmt->column == NULL)
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{
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/*
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* rename relation
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*/
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renamerel(RangeVarGetRelid(stmt->relation, false),
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stmt->newname);
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}
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else
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{
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/*
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* rename attribute
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*/
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renameatt(RangeVarGetRelid(stmt->relation, false),
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stmt->column, /* old att name */
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stmt->newname, /* new att name */
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interpretInhOption(stmt->relation->inhOpt)); /* recursive? */
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}
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}
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break;
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/* various Alter Table forms */
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case T_AlterTableStmt:
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{
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AlterTableStmt *stmt = (AlterTableStmt *) parsetree;
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/*
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* Some or all of these functions are recursive to cover
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* inherited things, so permission checks are done there.
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*/
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switch (stmt->subtype)
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{
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case 'A': /* ADD COLUMN */
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/*
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* Recursively add column to table and,
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* if requested, to descendants
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*/
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AlterTableAddColumn(RangeVarGetRelid(stmt->relation, false),
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interpretInhOption(stmt->relation->inhOpt),
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(ColumnDef *) stmt->def);
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break;
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case 'T': /* ALTER COLUMN DEFAULT */
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/*
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* Recursively alter column default for table and,
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* if requested, for descendants
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*/
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AlterTableAlterColumnDefault(RangeVarGetRelid(stmt->relation, false),
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interpretInhOption(stmt->relation->inhOpt),
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stmt->name,
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stmt->def);
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break;
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case 'N': /* ALTER COLUMN DROP NOT NULL */
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AlterTableAlterColumnDropNotNull(RangeVarGetRelid(stmt->relation, false),
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interpretInhOption(stmt->relation->inhOpt),
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stmt->name);
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break;
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case 'O': /* ALTER COLUMN SET NOT NULL */
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AlterTableAlterColumnSetNotNull(RangeVarGetRelid(stmt->relation, false),
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interpretInhOption(stmt->relation->inhOpt),
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stmt->name);
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break;
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case 'S': /* ALTER COLUMN STATISTICS */
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case 'M': /* ALTER COLUMN STORAGE */
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/*
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* Recursively alter column statistics for table and,
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* if requested, for descendants
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*/
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AlterTableAlterColumnFlags(RangeVarGetRelid(stmt->relation, false),
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interpretInhOption(stmt->relation->inhOpt),
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stmt->name,
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stmt->def,
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&(stmt->subtype));
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break;
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case 'D': /* DROP COLUMN */
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/*
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* XXX We don't actually recurse yet, but what we should do would be:
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* Recursively drop column from table and,
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* if requested, from descendants
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*/
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AlterTableDropColumn(RangeVarGetRelid(stmt->relation, false),
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interpretInhOption(stmt->relation->inhOpt),
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stmt->name,
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stmt->behavior);
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break;
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case 'C': /* ADD CONSTRAINT */
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/*
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* Recursively add constraint to table and,
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* if requested, to descendants
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*/
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AlterTableAddConstraint(RangeVarGetRelid(stmt->relation, false),
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interpretInhOption(stmt->relation->inhOpt),
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(List *) stmt->def);
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break;
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case 'X': /* DROP CONSTRAINT */
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/*
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* Recursively drop constraint from table and,
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* if requested, from descendants
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*/
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AlterTableDropConstraint(RangeVarGetRelid(stmt->relation, false),
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interpretInhOption(stmt->relation->inhOpt),
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stmt->name,
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stmt->behavior);
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break;
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case 'E': /* CREATE TOAST TABLE */
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AlterTableCreateToastTable(RangeVarGetRelid(stmt->relation, false),
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false);
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break;
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case 'U': /* ALTER OWNER */
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/* check that we are the superuser */
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if (!superuser())
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elog(ERROR, "ALTER TABLE: permission denied");
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/* get_usesysid raises an error if no such user */
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AlterTableOwner(RangeVarGetRelid(stmt->relation, false),
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get_usesysid(stmt->name));
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break;
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default: /* oops */
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elog(ERROR, "T_AlterTableStmt: unknown subtype");
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break;
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}
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}
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break;
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case T_GrantStmt:
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{
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GrantStmt *stmt = (GrantStmt *) parsetree;
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ExecuteGrantStmt(stmt);
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}
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break;
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/*
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* ******************************** object creation /
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* destruction ********************************
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*
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*/
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case T_DefineStmt:
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{
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DefineStmt *stmt = (DefineStmt *) parsetree;
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switch (stmt->defType)
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{
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case OPERATOR:
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DefineOperator(stmt->defnames, stmt->definition);
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break;
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case TYPE_P:
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DefineType(stmt->defnames, stmt->definition);
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break;
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case AGGREGATE:
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DefineAggregate(stmt->defnames, stmt->definition);
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break;
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}
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}
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break;
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case T_ViewStmt: /* CREATE VIEW */
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{
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ViewStmt *stmt = (ViewStmt *) parsetree;
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DefineView(stmt->view, stmt->query);
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}
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break;
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case T_ProcedureStmt: /* CREATE FUNCTION */
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CreateFunction((ProcedureStmt *) parsetree);
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break;
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case T_IndexStmt: /* CREATE INDEX */
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{
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IndexStmt *stmt = (IndexStmt *) parsetree;
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CheckOwnership(stmt->relation, true);
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DefineIndex(stmt->relation, /* relation */
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stmt->idxname, /* index name */
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stmt->accessMethod, /* am name */
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stmt->indexParams, /* parameters */
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stmt->unique,
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stmt->primary,
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(Expr *) stmt->whereClause,
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stmt->rangetable);
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}
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break;
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case T_RuleStmt: /* CREATE RULE */
|
|
DefineQueryRewrite((RuleStmt *) parsetree);
|
|
break;
|
|
|
|
case T_CreateSeqStmt:
|
|
DefineSequence((CreateSeqStmt *) parsetree);
|
|
break;
|
|
|
|
case T_RemoveAggrStmt:
|
|
{
|
|
RemoveAggrStmt *stmt = (RemoveAggrStmt *) parsetree;
|
|
|
|
RemoveAggregate(stmt->aggname, stmt->aggtype);
|
|
}
|
|
break;
|
|
|
|
case T_RemoveFuncStmt:
|
|
{
|
|
RemoveFuncStmt *stmt = (RemoveFuncStmt *) parsetree;
|
|
|
|
RemoveFunction(stmt->funcname, stmt->args);
|
|
}
|
|
break;
|
|
|
|
case T_RemoveOperStmt:
|
|
{
|
|
RemoveOperStmt *stmt = (RemoveOperStmt *) parsetree;
|
|
TypeName *typenode1 = (TypeName *) lfirst(stmt->args);
|
|
TypeName *typenode2 = (TypeName *) lsecond(stmt->args);
|
|
|
|
RemoveOperator(stmt->opname, typenode1, typenode2);
|
|
}
|
|
break;
|
|
|
|
case T_CreatedbStmt:
|
|
{
|
|
CreatedbStmt *stmt = (CreatedbStmt *) parsetree;
|
|
|
|
createdb(stmt->dbname, stmt->dbowner,
|
|
stmt->dbpath, stmt->dbtemplate,
|
|
stmt->encoding);
|
|
}
|
|
break;
|
|
|
|
case T_AlterDatabaseSetStmt:
|
|
AlterDatabaseSet((AlterDatabaseSetStmt *)parsetree);
|
|
break;
|
|
|
|
case T_DropdbStmt:
|
|
{
|
|
DropdbStmt *stmt = (DropdbStmt *) parsetree;
|
|
|
|
dropdb(stmt->dbname);
|
|
}
|
|
break;
|
|
|
|
/* Query-level asynchronous notification */
|
|
case T_NotifyStmt:
|
|
{
|
|
NotifyStmt *stmt = (NotifyStmt *) parsetree;
|
|
|
|
Async_Notify(stmt->relation->relname);
|
|
}
|
|
break;
|
|
|
|
case T_ListenStmt:
|
|
{
|
|
ListenStmt *stmt = (ListenStmt *) parsetree;
|
|
|
|
Async_Listen(stmt->relation->relname, MyProcPid);
|
|
}
|
|
break;
|
|
|
|
case T_UnlistenStmt:
|
|
{
|
|
UnlistenStmt *stmt = (UnlistenStmt *) parsetree;
|
|
|
|
Async_Unlisten(stmt->relation->relname, MyProcPid);
|
|
}
|
|
break;
|
|
|
|
case T_LoadStmt:
|
|
{
|
|
LoadStmt *stmt = (LoadStmt *) parsetree;
|
|
|
|
closeAllVfds(); /* probably not necessary... */
|
|
load_file(stmt->filename);
|
|
}
|
|
break;
|
|
|
|
case T_ClusterStmt:
|
|
{
|
|
ClusterStmt *stmt = (ClusterStmt *) parsetree;
|
|
|
|
CheckOwnership(stmt->relation, true);
|
|
|
|
cluster(stmt->relation, stmt->indexname);
|
|
}
|
|
break;
|
|
|
|
case T_VacuumStmt:
|
|
vacuum((VacuumStmt *) parsetree);
|
|
break;
|
|
|
|
case T_ExplainStmt:
|
|
ExplainQuery((ExplainStmt *) parsetree, dest);
|
|
break;
|
|
|
|
#ifdef NOT_USED
|
|
|
|
case T_RecipeStmt:
|
|
{
|
|
RecipeStmt *stmt = (RecipeStmt *) parsetree;
|
|
|
|
beginRecipe(stmt);
|
|
}
|
|
break;
|
|
#endif
|
|
|
|
case T_VariableSetStmt:
|
|
{
|
|
VariableSetStmt *n = (VariableSetStmt *) parsetree;
|
|
|
|
SetPGVariable(n->name, n->args);
|
|
}
|
|
break;
|
|
|
|
case T_VariableShowStmt:
|
|
{
|
|
VariableShowStmt *n = (VariableShowStmt *) parsetree;
|
|
|
|
GetPGVariable(n->name);
|
|
}
|
|
break;
|
|
|
|
case T_VariableResetStmt:
|
|
{
|
|
VariableResetStmt *n = (VariableResetStmt *) parsetree;
|
|
|
|
ResetPGVariable(n->name);
|
|
}
|
|
break;
|
|
|
|
case T_CreateTrigStmt:
|
|
CreateTrigger((CreateTrigStmt *) parsetree);
|
|
break;
|
|
|
|
case T_DropPropertyStmt:
|
|
{
|
|
DropPropertyStmt *stmt = (DropPropertyStmt *) parsetree;
|
|
Oid relId;
|
|
|
|
relId = RangeVarGetRelid(stmt->relation, false);
|
|
|
|
switch (stmt->removeType)
|
|
{
|
|
case DROP_RULE:
|
|
/* RemoveRewriteRule checks permissions */
|
|
RemoveRewriteRule(relId, stmt->property);
|
|
break;
|
|
case DROP_TRIGGER:
|
|
/* DropTrigger checks permissions */
|
|
DropTrigger(relId, stmt->property);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case T_CreatePLangStmt:
|
|
CreateProceduralLanguage((CreatePLangStmt *) parsetree);
|
|
break;
|
|
|
|
case T_DropPLangStmt:
|
|
DropProceduralLanguage((DropPLangStmt *) parsetree);
|
|
break;
|
|
|
|
/*
|
|
* ******************************** DOMAIN statements ****
|
|
*/
|
|
case T_CreateDomainStmt:
|
|
DefineDomain((CreateDomainStmt *) parsetree);
|
|
break;
|
|
|
|
/*
|
|
* ******************************** USER statements ****
|
|
*/
|
|
case T_CreateUserStmt:
|
|
CreateUser((CreateUserStmt *) parsetree);
|
|
break;
|
|
|
|
case T_AlterUserStmt:
|
|
AlterUser((AlterUserStmt *) parsetree);
|
|
break;
|
|
|
|
case T_AlterUserSetStmt:
|
|
AlterUserSet((AlterUserSetStmt *) parsetree);
|
|
break;
|
|
|
|
case T_DropUserStmt:
|
|
DropUser((DropUserStmt *) parsetree);
|
|
break;
|
|
|
|
case T_LockStmt:
|
|
LockTableCommand((LockStmt *) parsetree);
|
|
break;
|
|
|
|
case T_ConstraintsSetStmt:
|
|
DeferredTriggerSetState((ConstraintsSetStmt *) parsetree);
|
|
break;
|
|
|
|
case T_CreateGroupStmt:
|
|
CreateGroup((CreateGroupStmt *) parsetree);
|
|
break;
|
|
|
|
case T_AlterGroupStmt:
|
|
AlterGroup((AlterGroupStmt *) parsetree, "ALTER GROUP");
|
|
break;
|
|
|
|
case T_DropGroupStmt:
|
|
DropGroup((DropGroupStmt *) parsetree);
|
|
break;
|
|
|
|
case T_CheckPointStmt:
|
|
{
|
|
if (!superuser())
|
|
elog(ERROR, "permission denied");
|
|
CreateCheckPoint(false);
|
|
}
|
|
break;
|
|
|
|
case T_ReindexStmt:
|
|
{
|
|
ReindexStmt *stmt = (ReindexStmt *) parsetree;
|
|
|
|
switch (stmt->reindexType)
|
|
{
|
|
case INDEX:
|
|
relname = (char *) stmt->relation->relname;
|
|
CheckOwnership(stmt->relation, false);
|
|
ReindexIndex(stmt->relation, stmt->force);
|
|
break;
|
|
case TABLE:
|
|
CheckOwnership(stmt->relation, false);
|
|
ReindexTable(stmt->relation, stmt->force);
|
|
break;
|
|
case DATABASE:
|
|
relname = (char *) stmt->name;
|
|
ReindexDatabase(relname, stmt->force, false);
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
elog(ERROR, "ProcessUtility: command #%d unsupported",
|
|
nodeTag(parsetree));
|
|
break;
|
|
}
|
|
}
|