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Add LOCK command as DELETE FROM ... WHERE false.

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This commit is contained in:
Bruce Momjian
1998-01-22 23:05:18 +00:00
parent 0fd8d60185
commit 7015dfef4b
4 changed files with 33 additions and 7 deletions
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28
src/backend/parser/gram.y
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@ -10,7 +10,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 1.95 1998/01/20 05:04:07 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 1.96 1998/01/22 23:04:52 momjian Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@ -116,7 +116,7 @@ Oid param_type(int t); /* used in parse_expr.c */
CopyStmt, CreateStmt, CreateAsStmt, CreateSeqStmt, DefineStmt, DestroyStmt,
ExtendStmt, FetchStmt, GrantStmt, CreateTrigStmt, DropTrigStmt,
CreatePLangStmt, DropPLangStmt,
IndexStmt, ListenStmt, OptimizableStmt,
IndexStmt, ListenStmt, LockStmt, OptimizableStmt,
ProcedureStmt, RecipeStmt, RemoveAggrStmt, RemoveOperStmt,
RemoveFuncStmt, RemoveStmt,
RenameStmt, RevokeStmt, RuleStmt, TransactionStmt, ViewStmt, LoadStmt,
@ -276,7 +276,7 @@ Oid param_type(int t); /* used in parse_expr.c */
DATABASE, DELIMITERS, DO, EXPLAIN, EXTEND,
FORWARD, FUNCTION, HANDLER,
INDEX, INHERITS, INSTEAD, ISNULL,
LANCOMPILER, LISTEN, LOAD, LOCATION, MERGE, MOVE,
LANCOMPILER, LISTEN, LOAD, LOCK_P, LOCATION, MERGE, MOVE,
NEW, NONE, NOTHING, NOTNULL, OIDS, OPERATOR, PROCEDURAL,
RECIPE, RENAME, REPLACE, RESET, RETURNS, RULE,
SEQUENCE, SETOF, SHOW, STDIN, STDOUT, TRUSTED,
@ -364,6 +364,7 @@ stmt : AddAttrStmt
| GrantStmt
| IndexStmt
| ListenStmt
| LockStmt
| ProcedureStmt
| RecipeStmt
| RemoveAggrStmt
@ -2210,6 +2211,27 @@ DeleteStmt: DELETE FROM relation_name
}
;
/*
* Total hack to just lock a table inside a transaction.
* Is it worth making this a separate command, with
* its own node type and file. I don't think so. bjm 1998/1/22
*/
LockStmt: LOCK_P relation_name
{
DeleteStmt *n = makeNode(DeleteStmt);
A_Const *c = makeNode(A_Const);
c->val.type = T_String;
c->val.val.str = "f";
c->typename = makeNode(TypeName);
c->typename->name = xlateSqlType("bool");
n->relname = $2;
n->whereClause = c;
$$ = (Node *)n;
}
;
/*****************************************************************************
*

3
src/backend/parser/keywords.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/keywords.c,v 1.31 1998/01/20 05:04:09 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/keywords.c,v 1.32 1998/01/22 23:04:54 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -127,6 +127,7 @@ static ScanKeyword ScanKeywords[] = {
{"load", LOAD},
{"local", LOCAL},
{"location", LOCATION},
{"lock", LOCK_P},
{"match", MATCH},
{"merge", MERGE},
{"minute", MINUTE_P},