diff options
Diffstat (limited to 'src/backend/executor/execQual.c')
| -rw-r--r-- | src/backend/executor/execQual.c | 47 |
1 files changed, 46 insertions, 1 deletions
diff --git a/src/backend/executor/execQual.c b/src/backend/executor/execQual.c index 789251b70e7..6bb2b5fa942 100644 --- a/src/backend/executor/execQual.c +++ b/src/backend/executor/execQual.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/executor/execQual.c,v 1.96 2002/07/04 16:44:08 momjian Exp $ + * $Header: /cvsroot/pgsql/src/backend/executor/execQual.c,v 1.97 2002/07/06 20:16:35 momjian Exp $ * *------------------------------------------------------------------------- */ @@ -66,6 +66,8 @@ static Datum ExecEvalNullTest(NullTest *ntest, ExprContext *econtext, bool *isNull, ExprDoneCond *isDone); static Datum ExecEvalBooleanTest(BooleanTest *btest, ExprContext *econtext, bool *isNull, ExprDoneCond *isDone); +static Datum ExecEvalConstraint(Constraint *constraint, ExprContext *econtext, + bool *isNull, ExprDoneCond *isDone); /*---------- @@ -1226,6 +1228,43 @@ ExecEvalNullTest(NullTest *ntest, } } +/* + * ExecEvalConstraint + * + * Test the constraint against the data provided. If the data fits + * within the constraint specifications, pass it through (return the + * datum) otherwise throw an error. + */ +static Datum +ExecEvalConstraint(Constraint *constraint, ExprContext *econtext, + bool *isNull, ExprDoneCond *isDone) +{ + Datum result; + + result = ExecEvalExpr(constraint->raw_expr, econtext, isNull, isDone); + + /* Test for the constraint type */ + switch(constraint->contype) + { + case CONSTR_NOTNULL: + if (*isNull) + { + elog(ERROR, "Domain %s does not allow NULL values", constraint->name); + } + break; + case CONSTR_CHECK: + + elog(ERROR, "ExecEvalConstraint: Domain CHECK Constraints not yet implemented"); + break; + default: + elog(ERROR, "ExecEvalConstraint: Constraint type unknown"); + break; + } + + /* If all has gone well (constraint did not fail) return the datum */ + return result; +} + /* ---------------------------------------------------------------- * ExecEvalBooleanTest * @@ -1473,6 +1512,12 @@ ExecEvalExpr(Node *expression, isNull, isDone); break; + case T_Constraint: + retDatum = ExecEvalConstraint((Constraint *) expression, + econtext, + isNull, + isDone); + break; case T_CaseExpr: retDatum = ExecEvalCase((CaseExpr *) expression, econtext, |