private SqlExpression CreateComparison(SqlExpression a, SqlExpression b, Expression source)
{
SqlExpression lower = sql.Binary(SqlNodeType.LT, a, b);
SqlExpression equal = sql.Binary(SqlNodeType.EQ2V, a, b);
return(sql.SearchedCase(
new SqlWhen[] {
new SqlWhen(lower, sql.ValueFromObject(-1, false, source)),
new SqlWhen(equal, sql.ValueFromObject(0, false, source)),
},
sql.ValueFromObject(1, false, source), source
));
}