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CREATE/DROP TRIGGER syntax

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This commit is contained in:
Vadim B. Mikheev 1997-09-04 13:24:26 +00:00
parent 0badb77e73
commit bad4bc40b9
2 changed files with 102 additions and 9 deletions
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107
src/backend/parser/gram.y
View File

@ -10,7 +10,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 1.41 1997/09/01 06:00:35 thomas Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 1.42 1997/09/04 13:24:25 vadim Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@ -107,7 +107,7 @@ static Node *makeA_Expr(int oper, char *opname, Node *lexpr, Node *rexpr);
%type <node> stmt,
AddAttrStmt, ClosePortalStmt,
CopyStmt, CreateStmt, CreateSeqStmt, DefineStmt, DestroyStmt,
ExtendStmt, FetchStmt, GrantStmt,
ExtendStmt, FetchStmt, GrantStmt, CreateTrigStmt, DropTrigStmt,
IndexStmt, MoveStmt, ListenStmt, OptimizableStmt,
ProcedureStmt, PurgeStmt,
RecipeStmt, RemoveAggrStmt, RemoveOperStmt, RemoveFuncStmt, RemoveStmt,
@ -119,9 +119,9 @@ static Node *makeA_Expr(int oper, char *opname, Node *lexpr, Node *rexpr);
%type <str> txname
%type <node> SubSelect
%type <str> join_clause, join_type, join_outer, join_spec
%type <boolean> join_qual
%type <boolean> join_qual, TriggerActionTime, TriggerForSpec
%type <str> datetime
%type <str> datetime, TriggerEvents, TriggerFuncArg
%type <str> relation_name, copy_file_name, copy_delimiter, def_name,
database_name, access_method_clause, access_method, attr_name,
@ -136,7 +136,7 @@ static Node *makeA_Expr(int oper, char *opname, Node *lexpr, Node *rexpr);
SpecialRuleRelation
%type <str> privileges, operation_commalist, grantee
%type <chr> operation
%type <chr> operation, TriggerOneEvent
%type <list> stmtblock, stmtmulti,
relation_name_list, OptTableElementList, tableElementList,
@ -147,7 +147,7 @@ static Node *makeA_Expr(int oper, char *opname, Node *lexpr, Node *rexpr);
sort_clause, sortby_list, index_params, index_list, name_list,
from_clause, from_list, opt_array_bounds, nest_array_bounds,
expr_list, default_expr_list, attrs, res_target_list, res_target_list2,
def_list, opt_indirection, group_clause, groupby_list
def_list, opt_indirection, group_clause, groupby_list, TriggerFuncArgs
%type <list> union_clause, select_list
%type <list> join_list
@ -217,10 +217,10 @@ static Node *makeA_Expr(int oper, char *opname, Node *lexpr, Node *rexpr);
MERGE, MINUTEINTERVAL, MONTHINTERVAL, MOVE,
NATURAL, NEW, NONE, NOT, NOTHING, NOTIFY, NOTNULL,
OIDS, ON, OPERATOR, OPTION, OR, ORDER, OUTERJOIN,
PNULL, POSITION, PRIVILEGES, PUBLIC, PURGE, P_TYPE,
PNULL, POSITION, PRIVILEGES, PROCEDURE, PUBLIC, PURGE, P_TYPE,
RENAME, REPLACE, RESET, RETRIEVE, RETURNS, REVOKE, RIGHT, ROLLBACK, RULE,
SECONDINTERVAL, SELECT, SET, SETOF, SHOW, STDIN, STDOUT, STORE, SUBSTRING,
TABLE, TIME, TO, TRAILING, TRANSACTION, TRIM,
TABLE, TIME, TO, TRAILING, TRANSACTION, TRIGGER, TRIM,
UNION, UNIQUE, UPDATE, USING, VACUUM, VALUES,
VERBOSE, VERSION, VIEW, WHERE, WITH, WORK, YEARINTERVAL, ZONE
%token EXECUTE, RECIPE, EXPLAIN, LIKE, SEQUENCE
@ -278,9 +278,11 @@ stmt : AddAttrStmt
| CopyStmt
| CreateStmt
| CreateSeqStmt
| CreateTrigStmt
| ClusterStmt
| DefineStmt
| DestroyStmt
| DropTrigStmt
| ExtendStmt
| ExplainStmt
| FetchStmt
@ -713,6 +715,95 @@ OptSeqElem: IDENT NumConst
;
/*****************************************************************************
*
* QUERIES :
* CREATE TRIGGER ...
* DROP TRIGGER ...
*
*****************************************************************************/
CreateTrigStmt: CREATE TRIGGER name TriggerActionTime TriggerEvents ON
relation_name TriggerForSpec EXECUTE PROCEDURE
name '(' TriggerFuncArgs ')'
{
CreateTrigStmt *n = makeNode(CreateTrigStmt);
n->trigname = $3;
n->relname = $7;
n->funcname = $11;
n->args = $13;
n->before = $4;
n->row = $8;
memcpy (n->actions, $5, 4);
$$ = (Node *)n;
}
;
TriggerActionTime: BEFORE { $$ = true; }
| AFTER { $$ = false; }
;
TriggerEvents: TriggerOneEvent
{
char *e = palloc (4);
e[0] = $1; e[1] = 0; $$ = e;
}
| TriggerOneEvent OR TriggerOneEvent
{
char *e = palloc (4);
e[0] = $1; e[1] = $3; e[2] = 0; $$ = e;
}
| TriggerOneEvent OR TriggerOneEvent OR TriggerOneEvent
{
char *e = palloc (4);
e[0] = $1; e[1] = $3; e[2] = $5; e[3] = 0;
$$ = e;
}
;
TriggerOneEvent: INSERT { $$ = 'i'; }
| DELETE { $$ = 'd'; }
| UPDATE { $$ = 'u'; }
;
TriggerForSpec: FOR name name
{
if ( strcmp ($2, "each") != 0 )
elog (WARN, "parser: syntax error near %s", $2);
if ( strcmp ($3, "row") == 0 )
$$ = true;
else if ( strcmp ($3, "statement") == 0 )
$$ = false;
else
elog (WARN, "parser: syntax error near %s", $3);
}
;
TriggerFuncArgs: TriggerFuncArg
{ $$ = lcons($1, NIL); }
| TriggerFuncArgs ',' TriggerFuncArg
{ $$ = lappend($1, $3); }
| /* EMPTY */ { $$ = NIL; }
;
TriggerFuncArg: ICONST
{
char *s = (char *) palloc (256);
sprintf (s, "%d", $1);
$$ = s;
}
| Sconst { $$ = $1; }
;
DropTrigStmt: DROP TRIGGER name ON relation_name
{
DropTrigStmt *n = makeNode(DropTrigStmt);
n->trigname = $3;
n->relname = $5;
$$ = (Node *) n;
}
;
/*****************************************************************************
*
* QUERY :

4
src/backend/parser/keywords.c
View File

@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/keywords.c,v 1.13 1997/09/01 05:53:31 thomas Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/keywords.c,v 1.14 1997/09/04 13:24:26 vadim Exp $
*
*-------------------------------------------------------------------------
*/
@ -133,6 +133,7 @@ static ScanKeyword ScanKeywords[] = {
{ "outer", OUTERJOIN },
{ "position", POSITION },
{ "privileges", PRIVILEGES },
{ "procedure", PROCEDURE },
{ "public", PUBLIC },
{ "purge", PURGE },
{ "recipe", RECIPE },
@ -160,6 +161,7 @@ static ScanKeyword ScanKeywords[] = {
{ "to", TO },
{ "transaction", TRANSACTION },
{ "trailing", TRAILING },
{ "trigger", TRIGGER },
{ "trim", TRIM },
{ "type", P_TYPE },
{ "union", UNION },