public virtual SqlExpression VisitCondition(SqlConditionExpression expression)
{
var test = expression.Test;
if (test != null)
{
test = Visit(test);
}
var ifTrue = expression.IfTrue;
if (ifTrue != null)
{
ifTrue = Visit(ifTrue);
}
var ifFalse = expression.IfFalse;
if (ifFalse != null)
{
ifFalse = Visit(ifFalse);
}
return(SqlExpression.Condition(test, ifTrue, ifFalse));
}
public override SqlExpression VisitSimpleCaseExpression(PlSqlParser.SimpleCaseExpressionContext context)
{
var exp = Visit(context.atom());
var switches = new List <CaseSwitch>();
foreach (var partContext in context.simpleCaseWhenExpressionPart())
{
var otherExp = Visit(partContext.conditionWrapper());
switches.Add(new CaseSwitch {
Condition = SqlExpression.Equal(exp, otherExp),
ReturnExpression = Visit(partContext.expressionWrapper())
});
}
if (context.caseElseExpressionPart() != null)
{
var returnExp = Visit(context.caseElseExpressionPart().expressionWrapper());
switches.Add(new CaseSwitch {
Condition = SqlExpression.Constant(SqlObject.Boolean(true)),
ReturnExpression = returnExp
});
}
SqlConditionExpression conditional = null;
for (int i = switches.Count - 1; i >= 0; i--)
{
var current = switches[i];
var condition = SqlExpression.Condition(current.Condition, current.ReturnExpression);
if (conditional != null)
{
conditional = SqlExpression.Condition(current.Condition, current.ReturnExpression, conditional);
}
else
{
conditional = condition;
}
}
return(conditional);
}