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Support specifying PRIMARY KEY for the SERIAL type.

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Change DEFAULT NULL to send back a NULL pointer
 rather than a string "NULL". This seems to work, where sending
 the string led to type conversion problems (and probably the wrong
 thing anyway).
This commit is contained in:
Thomas G. Lockhart 1998-09-16 14:29:35 +00:00
parent 7c30ac961f
commit 20693de474
1 changed files with 37 additions and 6 deletions
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43
src/backend/parser/gram.y
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@ -10,7 +10,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.30 1998/09/13 04:19:29 thomas Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.31 1998/09/16 14:29:35 thomas Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@ -236,7 +236,7 @@ Oid param_type(int t); /* used in parse_expr.c */
%type <node> TableConstraint
%type <list> constraint_list, constraint_expr
%type <list> default_list, default_expr
%type <list> ColQualList, ColQualifier
%type <list> ColPrimaryKey, ColQualList, ColQualifier
%type <node> ColConstraint, ColConstraintElem
%type <list> key_actions, key_action
%type <str> key_match, key_reference
@ -751,7 +751,7 @@ columnDef: ColId Typename ColQualifier
n->constraints = $3;
$$ = (Node *)n;
}
| ColId SERIAL
| ColId SERIAL ColPrimaryKey
{
ColumnDef *n = makeNode(ColumnDef);
n->colname = $1;
@ -760,7 +760,7 @@ columnDef: ColId Typename ColQualifier
n->defval = NULL;
n->is_not_null = TRUE;
n->is_sequence = TRUE;
n->constraints = NULL;
n->constraints = $3;
$$ = (Node *)n;
}
@ -786,6 +786,18 @@ ColQualList: ColQualList ColConstraint
}
;
ColPrimaryKey: PRIMARY KEY
{
Constraint *n = makeNode(Constraint);
n->contype = CONSTR_PRIMARY;
n->name = NULL;
n->def = NULL;
n->keys = NULL;
$$ = lcons((Node *)n, NIL);
}
| /*EMPTY*/ { $$ = NULL; }
;
ColConstraint:
CONSTRAINT name ColConstraintElem
{
@ -806,6 +818,11 @@ ColConstraint:
$$ = NULL;
}
* - thomas 1998-09-12
*
* DEFAULT NULL is already the default for Postgres.
* Bue define it here and carry it forward into the system
* to make it explicit.
* - thomas 1998-09-13
*/
ColConstraintElem: CHECK '(' constraint_expr ')'
{
@ -816,6 +833,15 @@ ColConstraintElem: CHECK '(' constraint_expr ')'
n->keys = NULL;
$$ = (Node *)n;
}
| DEFAULT NULL_P
{
Constraint *n = makeNode(Constraint);
n->contype = CONSTR_DEFAULT;
n->name = NULL;
n->def = NULL;
n->keys = NULL;
$$ = (Node *)n;
}
| DEFAULT default_expr
{
Constraint *n = makeNode(Constraint);
@ -870,10 +896,15 @@ default_list: default_list ',' default_expr
}
;
default_expr: AexprConst
{ $$ = makeConstantList((A_Const *) $1); }
/* The Postgres default column value is NULL.
* Rather than carrying DEFAULT NULL forward as a clause,
* let's just have it be a no-op.
| NULL_P
{ $$ = lcons( makeString("NULL"), NIL); }
* - thomas 1998-09-13
*/
default_expr: AexprConst
{ $$ = makeConstantList((A_Const *) $1); }
| '-' default_expr %prec UMINUS
{ $$ = lcons( makeString( "-"), $2); }
| default_expr '+' default_expr