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This is part #1 for of the DEFERRED CONSTRAINT TRIGGER support.

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Implements the CREATE CONSTRAINT TRIGGER and SET CONSTRAINTS commands.

TODO:
    Generic builtin trigger procedures
    Automatic execution of appropriate CREATE CONSTRAINT... at CREATE TABLE
    Support of new trigger type in pg_dump
    Swapping of huge # of events to disk

Jan
This commit is contained in:
Jan Wieck
1999-09-29 16:06:40 +00:00
parent d810338d29
commit 1547ee017c
20 changed files with 1473 additions and 245 deletions
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159
src/backend/parser/gram.y
View File

@@ -10,7 +10,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.103 1999/09/28 14:49:36 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.104 1999/09/29 16:06:06 wieck Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@@ -132,7 +132,8 @@ Oid param_type(int t); /* used in parse_expr.c */
CreatedbStmt, DestroydbStmt, VacuumStmt, CursorStmt, SubSelect,
UpdateStmt, InsertStmt, select_clause, SelectStmt, NotifyStmt, DeleteStmt,
ClusterStmt, ExplainStmt, VariableSetStmt, VariableShowStmt, VariableResetStmt,
CreateUserStmt, AlterUserStmt, DropUserStmt, RuleActionStmt
CreateUserStmt, AlterUserStmt, DropUserStmt, RuleActionStmt,
ConstraintsSetStmt,
%type <str> opt_database1, opt_database2, location, encoding
@@ -146,6 +147,9 @@ Oid param_type(int t); /* used in parse_expr.c */
%type <boolean> TriggerActionTime, TriggerForSpec, PLangTrusted
%type <ival> OptConstrTrigDeferrable, OptConstrTrigInitdeferred
%type <str> OptConstrFromTable
%type <str> TriggerEvents, TriggerFuncArg
%type <str> relation_name, copy_file_name, copy_delimiter, def_name,
@@ -254,6 +258,10 @@ Oid param_type(int t); /* used in parse_expr.c */
%type <list> key_actions, key_action
%type <str> key_match, key_reference
%type <list> constraints_set_list
%type <list> constraints_set_namelist
%type <boolean> constraints_set_mode
/*
* If you make any token changes, remember to:
* - use "yacc -d" and update parse.h
@@ -274,8 +282,8 @@ Oid param_type(int t); /* used in parse_expr.c */
BEGIN_TRANS, BETWEEN, BOTH, BY,
CASCADE, CASE, CAST, CHAR, CHARACTER, CHECK, CLOSE,
COALESCE, COLLATE, COLUMN, COMMIT,
CONSTRAINT, CREATE, CROSS, CURRENT, CURRENT_DATE, CURRENT_TIME,
CURRENT_TIMESTAMP, CURRENT_USER, CURSOR,
CONSTRAINT, CONSTRAINTS, CREATE, CROSS, CURRENT, CURRENT_DATE,
CURRENT_TIME, CURRENT_TIMESTAMP, CURRENT_USER, CURSOR,
DAY_P, DECIMAL, DECLARE, DEFAULT, DELETE, DESC, DISTINCT, DOUBLE, DROP,
ELSE, END_TRANS, EXCEPT, EXECUTE, EXISTS, EXTRACT,
FALSE_P, FETCH, FLOAT, FOR, FOREIGN, FROM, FULL,
@@ -295,7 +303,11 @@ Oid param_type(int t); /* used in parse_expr.c */
WHEN, WHERE, WITH, WORK, YEAR_P, ZONE
/* Keywords (in SQL3 reserved words) */
%token TRIGGER
%token DEFERRABLE, DEFERRED,
IMMEDIATE, INITIALLY,
PENDANT,
RESTRICT,
TRIGGER
/* Keywords (in SQL92 non-reserved words) */
%token COMMITTED, SERIALIZABLE, TYPE_P
@@ -415,6 +427,7 @@ stmt : AddAttrStmt
| VariableSetStmt
| VariableShowStmt
| VariableResetStmt
| ConstraintsSetStmt
;
/*****************************************************************************
@@ -630,6 +643,49 @@ VariableResetStmt: RESET ColId
;
ConstraintsSetStmt: SET CONSTRAINTS constraints_set_list constraints_set_mode
{
ConstraintsSetStmt *n = makeNode(ConstraintsSetStmt);
n->constraints = $3;
n->deferred = $4;
$$ = (Node *) n;
}
;
constraints_set_list: ALL
{
$$ = NIL;
}
| constraints_set_namelist
{
$$ = $1;
}
;
constraints_set_namelist: IDENT
{
$$ = lappend(NIL, $1);
}
| constraints_set_namelist ',' IDENT
{
$$ = lappend($1, $3);
}
;
constraints_set_mode: DEFERRED
{
$$ = true;
}
| IMMEDIATE
{
$$ = false;
}
;
/*****************************************************************************
*
* QUERY :
@@ -1434,6 +1490,54 @@ CreateTrigStmt: CREATE TRIGGER name TriggerActionTime TriggerEvents ON
n->before = $4;
n->row = $8;
memcpy (n->actions, $5, 4);
n->lang = NULL; /* unused */
n->text = NULL; /* unused */
n->attr = NULL; /* unused */
n->when = NULL; /* unused */
n->isconstraint = false;
n->deferrable = false;
n->initdeferred = false;
n->constrrelname = NULL;
$$ = (Node *)n;
}
| CREATE CONSTRAINT TRIGGER name AFTER TriggerOneEvent ON
relation_name OptConstrFromTable
OptConstrTrigDeferrable OptConstrTrigInitdeferred
FOR EACH ROW EXECUTE PROCEDURE name '(' TriggerFuncArgs ')'
{
CreateTrigStmt *n = makeNode(CreateTrigStmt);
n->trigname = $4;
n->relname = $8;
n->funcname = $17;
n->args = $19;
n->before = false;
n->row = true;
n->actions[0] = $6;
n->actions[1] = '\0';
n->lang = NULL; /* unused */
n->text = NULL; /* unused */
n->attr = NULL; /* unused */
n->when = NULL; /* unused */
/*
* Check that the DEFERRABLE and INITIALLY combination
* makes sense
*/
n->isconstraint = true;
if ($11 == 1)
{
if ($10 == 0)
elog(ERROR, "INITIALLY DEFERRED constraint "
"cannot be NOT DEFERRABLE");
n->deferrable = true;
n->initdeferred = true;
} else {
n->deferrable = ($10 == 1);
n->initdeferred = false;
}
n->constrrelname = $9;
$$ = (Node *)n;
}
;
@@ -1503,6 +1607,44 @@ TriggerFuncArg: ICONST
| IDENT { $$ = $1; }
;
OptConstrFromTable: /* Empty */
{
$$ = "";
}
| FROM relation_name
{
$$ = $2;
}
;
OptConstrTrigDeferrable: /* Empty */
{
$$ = -1;
}
| DEFERRABLE
{
$$ = 1;
}
| NOT DEFERRABLE
{
$$ = 0;
}
;
OptConstrTrigInitdeferred: /* Empty */
{
$$ = -1;
}
| INITIALLY DEFERRED
{
$$ = 1;
}
| INITIALLY IMMEDIATE
{
$$ = 0;
}
;
DropTrigStmt: DROP TRIGGER name ON relation_name
{
DropTrigStmt *n = makeNode(DropTrigStmt);
@@ -5080,10 +5222,13 @@ ColId: IDENT { $$ = $1; }
| BEFORE { $$ = "before"; }
| CACHE { $$ = "cache"; }
| COMMITTED { $$ = "committed"; }
| CONSTRAINTS { $$ = "constraints"; }
| CREATEDB { $$ = "createdb"; }
| CREATEUSER { $$ = "createuser"; }
| CYCLE { $$ = "cycle"; }
| DATABASE { $$ = "database"; }
| DEFERRABLE { $$ = "deferrable"; }
| DEFERRED { $$ = "deferred"; }
| DELIMITERS { $$ = "delimiters"; }
| DOUBLE { $$ = "double"; }
| EACH { $$ = "each"; }
@@ -5092,9 +5237,11 @@ ColId: IDENT { $$ = $1; }
| FORWARD { $$ = "forward"; }
| FUNCTION { $$ = "function"; }
| HANDLER { $$ = "handler"; }
| IMMEDIATE { $$ = "immediate"; }
| INCREMENT { $$ = "increment"; }
| INDEX { $$ = "index"; }
| INHERITS { $$ = "inherits"; }
| INITIALLY { $$ = "initially"; }
| INSENSITIVE { $$ = "insensitive"; }
| INSTEAD { $$ = "instead"; }
| ISNULL { $$ = "isnull"; }
@@ -5119,12 +5266,14 @@ ColId: IDENT { $$ = $1; }
| OPERATOR { $$ = "operator"; }
| OPTION { $$ = "option"; }
| PASSWORD { $$ = "password"; }
| PENDANT { $$ = "pendant"; }
| PRIOR { $$ = "prior"; }
| PRIVILEGES { $$ = "privileges"; }
| PROCEDURAL { $$ = "procedural"; }
| READ { $$ = "read"; }
| RELATIVE { $$ = "relative"; }
| RENAME { $$ = "rename"; }
| RESTRICT { $$ = "restrict"; }
| RETURNS { $$ = "returns"; }
| ROW { $$ = "row"; }
| RULE { $$ = "rule"; }

9
src/backend/parser/keywords.c
View File

@@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/keywords.c,v 1.61 1999/09/23 17:02:46 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/keywords.c,v 1.62 1999/09/29 16:06:08 wieck Exp $
*
*-------------------------------------------------------------------------
*/
@@ -63,6 +63,7 @@ static ScanKeyword ScanKeywords[] = {
{"commit", COMMIT},
{"committed", COMMITTED},
{"constraint", CONSTRAINT},
{"constraints", CONSTRAINTS},
{"copy", COPY},
{"create", CREATE},
{"createdb", CREATEDB},
@@ -79,6 +80,8 @@ static ScanKeyword ScanKeywords[] = {
{"decimal", DECIMAL},
{"declare", DECLARE},
{"default", DEFAULT},
{"deferrable", DEFERRABLE},
{"deferred", DEFERRED},
{"delete", DELETE},
{"delimiters", DELIMITERS},
{"desc", DESC},
@@ -112,10 +115,12 @@ static ScanKeyword ScanKeywords[] = {
{"handler", HANDLER},
{"having", HAVING},
{"hour", HOUR_P},
{"immediate", IMMEDIATE},
{"in", IN},
{"increment", INCREMENT},
{"index", INDEX},
{"inherits", INHERITS},
{"initially", INITIALLY},
{"inner", INNER_P},
{"insensitive", INSENSITIVE},
{"insert", INSERT},
@@ -177,6 +182,7 @@ static ScanKeyword ScanKeywords[] = {
{"outer", OUTER_P},
{"partial", PARTIAL},
{"password", PASSWORD},
{"pendant", PENDANT},
{"position", POSITION},
{"precision", PRECISION},
{"primary", PRIMARY},
@@ -190,6 +196,7 @@ static ScanKeyword ScanKeywords[] = {
{"relative", RELATIVE},
{"rename", RENAME},
{"reset", RESET},
{"restrict", RESTRICT},
{"returns", RETURNS},
{"revoke", REVOKE},
{"right", RIGHT},