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Add TRUNCATE command, with psql help and sgml additions.

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This commit is contained in:
Bruce Momjian
1999-09-23 17:03:39 +00:00
parent abd4bf1341
commit e7cad7b0cb
15 changed files with 497 additions and 44 deletions
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34
src/backend/tcop/utility.c
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@@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/tcop/utility.c,v 1.65 1999/09/18 19:07:44 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/tcop/utility.c,v 1.66 1999/09/23 17:02:52 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@@ -206,6 +206,38 @@ ProcessUtility(Node *parsetree,
}
break;
case T_TruncateStmt:
{
Relation rel;
PS_SET_STATUS(commandTag = "TRUNCATE");
CHECK_IF_ABORTED();
relname = ((TruncateStmt *) parsetree)->relName;
if (!allowSystemTableMods && IsSystemRelationName(relname)) {
elog(ERROR, "TRUNCATE cannot be used on system tables. '%s' is a system table",
relname);
}
rel = heap_openr(relname);
if (RelationIsValid(rel)) {
if (rel->rd_rel->relkind == RELKIND_SEQUENCE) {
elog(ERROR, "TRUNCATE cannot be used on sequences. '%s' is a sequence",
relname);
}
heap_close(rel);
}
#ifndef NO_SECURITY
if (!pg_ownercheck(userName, relname, RELNAME)) {
elog(ERROR, "you do not own class \"%s\"", relname);
}
#endif
TruncateRelation(((TruncateStmt *) parsetree)->relName);
}
break;
case T_CopyStmt:
{
CopyStmt *stmt = (CopyStmt *) parsetree;