public override ISqlNode VisitInfixOperation(SqlInfixOperationNode n)
{
// TODO: Can we assert a more specific requirement on Left and Right?
_result.AssertNotNull(n, nameof(n.Left), n.Left);
_result.AssertNotNull(n, nameof(n.Operator), n.Operator);
_result.AssertNotNull(n, nameof(n.Right), n.Right);
if (n.IsUnionOperation())
{
_result.AssertIsUnionStatement(n, nameof(n.Left), n.Left);
_result.AssertIsUnionStatement(n, nameof(n.Right), n.Right);
}
else if (n.IsArithmeticOperation())
{
_result.AssertIsScalarExpression(n, nameof(n.Left), n.Left);
_result.AssertIsScalarExpression(n, nameof(n.Right), n.Right);
}
else if (n.IsBooleanOperation())
{
_result.AssertIsBooleanExpression(n, nameof(n.Left), n.Left);
_result.AssertIsBooleanExpression(n, nameof(n.Right), n.Right);
}
else if (n.IsComparisonOperation())
{
_result.AssertIsScalarExpression(n, nameof(n.Left), n.Left);
_result.AssertIsScalarExpression(n, nameof(n.Right), n.Right);
}
else
{
_result.UnexpectedNodeType(n, nameof(n.Operator), n.Operator);
}
return(base.VisitInfixOperation(n));
}
public override ISqlNode VisitInfixOperation(SqlInfixOperationNode n)
{
n = base.VisitInfixOperation(n) as SqlInfixOperationNode;
if (n.IsArithmeticOperation())
{
if (n.Left is SqlNumberNode nl && n.Right is SqlNumberNode nr)
{
var newNode = n.Operator.Apply(nl, nr);
newNode.Location = n.Location;
return(newNode);
}
if (n.Left is SqlStringNode sl && n.Right is SqlStringNode a)
{
var newNode = n.Operator.Apply(sl, a);
newNode.Location = n.Location;
return(newNode);
}
}
// TODO: If the operation is AND or OR and both sides can reduce to one of (TRUE, FALSE), we can reduce the whole thing
return(n);
}