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Code review for domain-constraints patch. Use a new ConstraintTest node

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type for runtime constraint checks, instead of misusing the parse-time
Constraint node for the purpose.  Fix some damage introduced into type
coercion logic; in particular ensure that a coerced expression tree will
read out the correct result type when inspected (patch had broken some
RelabelType cases).  Enforce domain NOT NULL constraints against columns
that are omitted from an INSERT.
This commit is contained in:
Tom Lane
2002-08-31 22:10:48 +00:00
parent 1440acd703
commit 845a6c3acc
19 changed files with 335 additions and 176 deletions
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14
src/backend/parser/parse_expr.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/parse_expr.c,v 1.126 2002/08/26 17:53:58 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/parse_expr.c,v 1.127 2002/08/31 22:10:46 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -640,6 +640,7 @@ transformExpr(ParseState *pstate, Node *expr)
case T_ArrayRef:
case T_FieldSelect:
case T_RelabelType:
case T_ConstraintTest:
{
result = (Node *) expr;
break;
@ -919,15 +920,15 @@ exprType(Node *expr)
case T_CaseWhen:
type = exprType(((CaseWhen *) expr)->result);
break;
case T_Constraint:
type = exprType(((Constraint *) expr)->raw_expr);
break;
case T_NullTest:
type = BOOLOID;
break;
case T_BooleanTest:
type = BOOLOID;
break;
case T_ConstraintTest:
type = exprType(((ConstraintTest *) expr)->arg);
break;
default:
elog(ERROR, "exprType: Do not know how to get type for %d node",
nodeTag(expr));
@ -978,10 +979,8 @@ exprTypmod(Node *expr)
break;
case T_FieldSelect:
return ((FieldSelect *) expr)->resulttypmod;
break;
case T_RelabelType:
return ((RelabelType *) expr)->resulttypmod;
break;
case T_CaseExpr:
{
/*
@ -1013,6 +1012,9 @@ exprTypmod(Node *expr)
return typmod;
}
break;
case T_ConstraintTest:
return exprTypmod(((ConstraintTest *) expr)->arg);
default:
break;
}