public SqlStringNode Apply(SqlStringNode left, SqlStringNode right)
{
if (Operator == "+")
{
return(new SqlStringNode(left.Value + right.Value));
}
throw new Exception($"Cannot apply operator {Operator} to operands of type string");
}
private ISqlNode TryReduceStringToNumber(SqlStringNode asString)
{
switch (DataType.DataType.Keyword)
{
case "INT":
return(new SqlNumberNode(int.Parse(asString.Value)));
case "BIT":
return(new SqlNumberNode(int.Parse(asString.Value) > 0 ? 1 : 0));
case "BIGINT":
return(new SqlNumberNode(long.Parse(asString.Value)));
case "DECIMAL":
case "DEC":
case "NUMERIC":
// TODO: size and precision
return(new SqlNumberNode(decimal.Parse(asString.Value)));
default:
return(this);
}
}
