void BuildSql(string field_type, MemberNode memberNode, ValueNode valueNode, ExpressionType op)
{
if(valueNode.Value == null)
{
ResolveNullValue(memberNode, op);
}
else
{
_builder.QueryByField(field_type/*memberNode.TableName*/, memberNode.TableName, memberNode.FieldName, _operationDictionary[op], valueNode.Value);
}
}
void BuildSql(MemberNode leftMember, MemberNode rightMember, ExpressionType op)
{
_builder.QueryByFieldComparison(leftMember.TableName, leftMember.FieldName, _operationDictionary[op], rightMember.TableName, rightMember.FieldName);
}
void BuildSql(ValueNode valueNode, MemberNode memberNode, ExpressionType op)
{
BuildSql(memberNode, valueNode, op);
}
void BuildSql(string field_type, MemberNode memberNode)
{
_builder.QueryByField(field_type, memberNode.TableName , memberNode.FieldName, _operationDictionary[ExpressionType.Equal], true);
}
void ResolveNullValue(MemberNode memberNode, ExpressionType op)
{
switch (op)
{
case ExpressionType.Equal:
_builder.QueryByFieldNull(memberNode.TableName, memberNode.FieldName);
break;
case ExpressionType.NotEqual:
_builder.QueryByFieldNotNull(memberNode.TableName, memberNode.FieldName);
break;
}
}