*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.144 2000/02/18 09:29:40 inoue Exp $
+ * $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.145 2000/02/19 08:25:49 thomas Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
%type <str> TypeId
%type <node> TableConstraint
-%type <list> ColPrimaryKey, ColQualList, ColQualifier
+%type <list> ColQualList, ColQualifier
%type <list> ColQualListWithNull
-%type <node> ColConstraint, ColConstraintElem
+%type <node> ColConstraint, ColConstraintElem, PrimaryKey, NotNull
+%type <node> DefaultClause, DefaultExpr
%type <node> ColConstraintWithNull, ColConstraintElemWithNull
-%type <ival> key_actions, key_action, key_reference
+%type <ival> key_actions, key_delete, key_update, key_reference
%type <str> key_match
-%type <ival> ConstraintAttributeSpec, ConstraintDeferrabilitySpec,
- ConstraintTimeSpec
+%type <ival> ConstraintAttribute, DeferrabilityClause,
+ TimeClause
%type <list> constraints_set_list
%type <list> constraints_set_namelist
| TableConstraint { $$ = $1; }
;
-columnDef: ColId Typename ColQualifier
+columnDef: ColId Typename ColQualifier opt_collate
{
ColumnDef *n = makeNode(ColumnDef);
n->colname = $1;
n->typename = $2;
+#if 0
n->raw_default = NULL;
n->cooked_default = NULL;
n->is_not_null = FALSE;
+#endif
n->constraints = $3;
+
+ if ($4 != NULL)
+ elog(NOTICE,"CREATE TABLE/COLLATE %s not yet implemented"
+ "; clause ignored", $4);
+
$$ = (Node *)n;
}
- | ColId SERIAL ColPrimaryKey
+ | ColId SERIAL PrimaryKey
{
ColumnDef *n = makeNode(ColumnDef);
n->colname = $1;
n->typename = makeNode(TypeName);
n->typename->name = xlateSqlType("integer");
n->typename->typmod = -1;
+#if 0
n->raw_default = NULL;
n->cooked_default = NULL;
+#endif
n->is_not_null = TRUE;
n->is_sequence = TRUE;
- n->constraints = $3;
+ n->constraints = lcons($3, NIL);
$$ = (Node *)n;
}
;
-ColQualifier: ColQualList { $$ = $1; }
- | NULL_P ColQualListWithNull { $$ = $2; }
- | NULL_P { $$ = NULL; }
+/*
+ * ColQualifier encapsulates an entire column qualification,
+ * including DEFAULT, constraints, and constraint attributes.
+ * Note that the DefaultClause handles the empty case.
+ */
+ColQualifier: DefaultClause ColQualList
+ {
+ if ($1 != NULL)
+ $$ = lcons($1, $2);
+ else
+ $$ = $2;
+ }
+ | NotNull DefaultClause ColQualListWithNull
+ {
+ $$ = lcons($1, $3);
+ if ($2 != NULL)
+ $$ = lcons($2, $$);
+ }
+ | DefaultExpr NotNull ColQualListWithNull
+ {
+ $$ = lcons($2, $3);
+ if ($1 != NULL)
+ $$ = lcons($1, $$);
+ }
+ | DefaultExpr NotNull
+ {
+ $$ = lcons($2, NIL);
+ if ($1 != NULL)
+ $$ = lcons($1, $$);
+ }
+ | NotNull DefaultClause
+ {
+ $$ = lcons($1, NIL);
+ if ($2 != NULL)
+ $$ = lcons($2, $$);
+ }
+ | NULL_P DefaultClause ColQualListWithNull
+ {
+ $$ = $3;
+ if ($2 != NULL)
+ $$ = lcons($2, $$);
+ }
+ | NULL_P DefaultClause
+ {
+ if ($2 != NULL)
+ $$ = lcons($2, NIL);
+ else
+ $$ = NIL;
+ }
+ | DefaultClause
+ {
+ if ($1 != NULL)
+ $$ = lcons($1, NIL);
+ else
+ $$ = NIL;
+ }
+ ;
+
+/*
+ * DEFAULT expression must be b_expr not a_expr to prevent shift/reduce
+ * conflict on NOT (since NOT might start a subsequent NOT NULL constraint,
+ * or be part of a_expr NOT LIKE or similar constructs).
+ */
+DefaultClause: DefaultExpr { $$ = $1; }
| /*EMPTY*/ { $$ = NULL; }
;
+DefaultExpr: DEFAULT NULL_P
+ {
+ Constraint *n = makeNode(Constraint);
+ n->contype = CONSTR_DEFAULT;
+ n->name = NULL;
+ n->raw_expr = NULL;
+ n->cooked_expr = NULL;
+ n->keys = NULL;
+ $$ = (Node *)n;
+ }
+ | DEFAULT b_expr
+ {
+ Constraint *n = makeNode(Constraint);
+ n->contype = CONSTR_DEFAULT;
+ n->name = NULL;
+ n->raw_expr = $2;
+ n->cooked_expr = NULL;
+ n->keys = NULL;
+ $$ = (Node *)n;
+ }
+ ;
+
ColQualList: ColQualList ColConstraint
{
if ($2 != NULL)
}
;
-ColQualListWithNull: ColQualListWithNull ColConstraintWithNull
+ColQualListWithNull: ColConstraintWithNull ColQualListWithNull
{
- if ($2 != NULL)
- $$ = lappend($1, $2);
+ if ($1 != NULL)
+ $$ = lcons($1, $2);
else
- $$ = $1;
+ $$ = $2;
}
| ColConstraintWithNull
{
}
;
-ColPrimaryKey: PRIMARY KEY
- {
- Constraint *n = makeNode(Constraint);
- n->contype = CONSTR_PRIMARY;
- n->name = NULL;
- n->raw_expr = NULL;
- n->cooked_expr = NULL;
- n->keys = NULL;
- $$ = lcons((Node *)n, NIL);
- }
- | /*EMPTY*/ { $$ = NULL; }
- ;
-
-ColConstraint:
- CONSTRAINT name ColConstraintElem
+ColConstraint: CONSTRAINT name ColConstraintElem
{
switch (nodeTag($3))
{
{ $$ = $1; }
;
-ColConstraintWithNull:
- CONSTRAINT name ColConstraintElemWithNull
+ColConstraintWithNull: CONSTRAINT name ColConstraintElemWithNull
{
switch (nodeTag($3))
{
* that a column may have that value. WITH NULL leads to
* shift/reduce conflicts with WITH TIME ZONE anyway.
* - thomas 1999-01-08
- *
- * DEFAULT expression must be b_expr not a_expr to prevent shift/reduce
- * conflict on NOT (since NOT might start a subsequent NOT NULL constraint,
- * or be part of a_expr NOT LIKE or similar constructs).
*/
ColConstraintElem: ColConstraintElemWithNull
{
$$ = $1;
}
- | NOT NULL_P
- {
- Constraint *n = makeNode(Constraint);
- n->contype = CONSTR_NOTNULL;
- n->name = NULL;
- n->raw_expr = NULL;
- n->cooked_expr = NULL;
- n->keys = NULL;
- $$ = (Node *)n;
- }
| UNIQUE
{
Constraint *n = makeNode(Constraint);
n->keys = NULL;
$$ = (Node *)n;
}
- | PRIMARY KEY
+ | PrimaryKey
{
- Constraint *n = makeNode(Constraint);
- n->contype = CONSTR_PRIMARY;
- n->name = NULL;
- n->raw_expr = NULL;
- n->cooked_expr = NULL;
- n->keys = NULL;
- $$ = (Node *)n;
+ $$ = $1;
}
;
n->keys = NULL;
$$ = (Node *)n;
}
- | DEFAULT NULL_P
+ | REFERENCES ColId opt_column_list
+ key_match key_actions ConstraintAttribute
{
- Constraint *n = makeNode(Constraint);
- n->contype = CONSTR_DEFAULT;
- n->name = NULL;
- n->raw_expr = NULL;
- n->cooked_expr = NULL;
- n->keys = NULL;
- $$ = (Node *)n;
- }
- | DEFAULT b_expr
- {
- Constraint *n = makeNode(Constraint);
- n->contype = CONSTR_DEFAULT;
- n->name = NULL;
- n->raw_expr = $2;
- n->cooked_expr = NULL;
- n->keys = NULL;
+ FkConstraint *n = makeNode(FkConstraint);
+ n->constr_name = NULL;
+ n->pktable_name = $2;
+ n->fk_attrs = NIL;
+ n->pk_attrs = $3;
+ n->match_type = $4;
+ n->actions = $5;
+ n->deferrable = (($6 & 1) != 0);
+ n->initdeferred = (($6 & 2) != 0);
$$ = (Node *)n;
}
- | REFERENCES ColId opt_column_list key_match key_actions
+ | REFERENCES ColId opt_column_list
+ key_match key_actions
{
- /* XXX
- * Need ConstraintAttributeSpec as $6 -- Jan
- */
FkConstraint *n = makeNode(FkConstraint);
n->constr_name = NULL;
n->pktable_name = $2;
n->actions = $5;
n->deferrable = true;
n->initdeferred = false;
- /*
- n->deferrable = ($6 & 1) != 0;
- n->initdeferred = ($6 & 2) != 0;
- */
$$ = (Node *)n;
}
;
+PrimaryKey: PRIMARY KEY
+ {
+ Constraint *n = makeNode(Constraint);
+ n->contype = CONSTR_PRIMARY;
+ n->name = NULL;
+ n->raw_expr = NULL;
+ n->cooked_expr = NULL;
+ n->keys = NULL;
+ $$ = (Node *)n;
+ }
+ ;
+
+NotNull: NOT NULL_P
+ {
+ Constraint *n = makeNode(Constraint);
+ n->contype = CONSTR_NOTNULL;
+ n->name = NULL;
+ n->raw_expr = NULL;
+ n->cooked_expr = NULL;
+ n->keys = NULL;
+ $$ = (Node *)n;
+ }
+
/* ConstraintElem specifies constraint syntax which is not embedded into
* a column definition. ColConstraintElem specifies the embedded form.
* - thomas 1997-12-03
n->keys = $3;
$$ = (Node *)n;
}
- | PRIMARY KEY '(' columnList ')'
+ | PrimaryKey '(' columnList ')'
{
- Constraint *n = makeNode(Constraint);
- n->contype = CONSTR_PRIMARY;
- n->name = NULL;
- n->raw_expr = NULL;
- n->cooked_expr = NULL;
- n->keys = $4;
+ Constraint *n = (Constraint *)$1;
+ n->keys = $3;
$$ = (Node *)n;
}
- | FOREIGN KEY '(' columnList ')' REFERENCES ColId opt_column_list key_match key_actions ConstraintAttributeSpec
+ | FOREIGN KEY '(' columnList ')' REFERENCES ColId opt_column_list
+ key_match key_actions ConstraintAttribute
{
FkConstraint *n = makeNode(FkConstraint);
n->constr_name = NULL;
n->initdeferred = ($11 & 2) != 0;
$$ = (Node *)n;
}
+ | FOREIGN KEY '(' columnList ')' REFERENCES ColId opt_column_list
+ key_match key_actions
+ {
+ FkConstraint *n = makeNode(FkConstraint);
+ n->constr_name = NULL;
+ n->pktable_name = $7;
+ n->fk_attrs = $4;
+ n->pk_attrs = $8;
+ n->match_type = $9;
+ n->actions = $10;
+ n->deferrable = false;
+ n->initdeferred = false;
+ $$ = (Node *)n;
+ }
;
key_match: MATCH FULL
}
| MATCH PARTIAL
{
- elog(ERROR, "FOREIGN KEY match type PARTIAL not implemented yet");
+ elog(ERROR, "FOREIGN KEY/MATCH PARTIAL not yet implemented");
$$ = "PARTIAL";
}
| /*EMPTY*/
}
;
-key_actions: key_action key_action { $$ = $1 | $2; }
- | key_action { $$ = $1; }
+key_actions: key_delete { $$ = $1; }
+ | key_update { $$ = $1; }
+ | key_delete key_update { $$ = $1 | $2; }
+ | key_update key_delete { $$ = $1 | $2; }
| /*EMPTY*/ { $$ = 0; }
;
-key_action: ON DELETE key_reference { $$ = $3 << FKCONSTR_ON_DELETE_SHIFT; }
- | ON UPDATE key_reference { $$ = $3 << FKCONSTR_ON_UPDATE_SHIFT; }
+key_delete: ON DELETE key_reference { $$ = $3 << FKCONSTR_ON_DELETE_SHIFT; }
+ ;
+
+key_update: ON UPDATE key_reference { $$ = $3 << FKCONSTR_ON_UPDATE_SHIFT; }
;
key_reference: NO ACTION { $$ = FKCONSTR_ON_KEY_NOACTION; }
}
| CREATE CONSTRAINT TRIGGER name AFTER TriggerEvents ON
relation_name OptConstrFromTable
- ConstraintAttributeSpec
+ ConstraintAttribute
FOR EACH ROW EXECUTE PROCEDURE name '(' TriggerFuncArgs ')'
{
CreateTrigStmt *n = makeNode(CreateTrigStmt);
}
;
-ConstraintAttributeSpec: ConstraintDeferrabilitySpec
- { $$ = $1; }
- | ConstraintDeferrabilitySpec ConstraintTimeSpec
+ConstraintAttribute: DeferrabilityClause
{
- if ($1 == 0 && $2 != 0)
- elog(ERROR, "INITIALLY DEFERRED constraint must be DEFERRABLE");
- $$ = $1 | $2;
+ $$ = $1;
}
- | ConstraintTimeSpec
+ | TimeClause
{
if ($1 != 0)
$$ = 3;
else
$$ = 0;
}
- | ConstraintTimeSpec ConstraintDeferrabilitySpec
+ | DeferrabilityClause TimeClause
+ {
+ if ($1 == 0 && $2 != 0)
+ elog(ERROR, "INITIALLY DEFERRED constraint must be DEFERRABLE");
+ $$ = $1 | $2;
+ }
+ | TimeClause DeferrabilityClause
{
if ($2 == 0 && $1 != 0)
elog(ERROR, "INITIALLY DEFERRED constraint must be DEFERRABLE");
$$ = $1 | $2;
}
- | /* Empty */
- { $$ = 0; }
;
-ConstraintDeferrabilitySpec: NOT DEFERRABLE
- { $$ = 0; }
- | DEFERRABLE
- { $$ = 1; }
+DeferrabilityClause: DEFERRABLE { $$ = 1; }
+ | NOT DEFERRABLE { $$ = 0; }
;
-ConstraintTimeSpec: INITIALLY IMMEDIATE
- { $$ = 0; }
- | INITIALLY DEFERRED
- { $$ = 2; }
+TimeClause: INITIALLY IMMEDIATE { $$ = 0; }
+ | INITIALLY DEFERRED { $$ = 2; }
;
n = makeNode(CreatedbStmt);
n->dbname = $3;
n->dbpath = $5;
-#ifdef MULTIBYTE
- if ($6 != NULL) {
- n->encoding = pg_char_to_encoding($6);
- if (n->encoding < 0) {
- elog(ERROR, "Encoding name '%s' is invalid", $6);
- }
- } else {
- n->encoding = GetTemplateEncoding();
- }
-#else
- n->encoding = 0;
-#endif
+ n->encoding = $6;
$$ = (Node *)n;
}
| CREATE DATABASE database_name
#ifdef MULTIBYTE
$$ = GetTemplateEncoding();
#else
- $$ = -1;
+ $$ = 0;
#endif
}
| /*EMPTY*/
#ifdef MULTIBYTE
$$ = GetTemplateEncoding();
#else
- $$= -1;
+ $$= 0;
#endif
}
;
}
;
-character: CHARACTER opt_varying opt_charset opt_collate
+character: CHARACTER opt_varying opt_charset
{
char *type, *c;
if (($3 == NULL) || (strcasecmp($3, "sql_text") == 0)) {
type = xlateSqlType($3);
}
};
- if ($4 != NULL)
- elog(NOTICE,"COLLATE %s not yet implemented; clause ignored",$4);
$$ = type;
}
| CHAR opt_varying { $$ = xlateSqlType($2? "varchar": "char"); }
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