How can I use SQL in XMLA for SSAS? - sql

Question

I have a problem with usage of SQL in XMLA for SSAS. It is required for Python library that interacts with SSAS server using SOAP protocol. There are 2 ways to reach data: MDX (multidimentional mode) and SQL (tabular mode). I have a simple task to select data from 1 table. So SQL should fit best, but it has too many limitations: there is no groups, havings, limits, also WHERE clause is limited to "=" operator. So it cannot be used for large tables in real world.
Example of code:
<soap-env:Envelope xmlns:soap-env="http://schemas.xmlsoap.org/soap/envelope/" xmlns="urn:schemas-microsoft-com:xml-analysis">
<soap-env:Body>
<Execute>
<Command>
<Statement>
SELECT [Customer Id] as [Customer.Customer Id] ,[Title] as [Customer.Title]
FROM [Adventure Works Internet Sales Model].[$Customer]
WHERE ([Customer Id]="11000" OR [Customer Id]="11001" OR [Customer Id]="11002" OR [Customer Id]="11003" OR [Customer Id]="11004")
</Statement>
</Command>
<Properties>
<PropertyList>
<Format>Tabular</Format>
<AxisFormat>TupleFormat</AxisFormat>
<MaximumRows>2</MaximumRows>
</PropertyList>
</Properties>
</Execute>
</soap-env:Body>
</soap-env:Envelope>
Also, "MaximumRows" doesn't works here. Result is next:
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Body>
<ExecuteResponse xmlns="urn:schemas-microsoft-com:xml-analysis">
<return>
<root xmlns="urn:schemas-microsoft-com:xml-analysis:rowset" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msxmla="http://schemas.microsoft.com/analysisservices/2003/xmla">
<xsd:schema targetNamespace="urn:schemas-microsoft-com:xml-analysis:rowset" xmlns:sql="urn:schemas-microsoft-com:xml-sql" elementFormDefault="qualified">
<xsd:element name="root">
<xsd:complexType>
<xsd:sequence minOccurs="0" maxOccurs="unbounded">
<xsd:element name="row" type="row" />
</xsd:sequence>
</xsd:complexType>
</xsd:element>
<xsd:simpleType name="uuid">
<xsd:restriction base="xsd:string">
<xsd:pattern value="[0-9a-zA-Z]{8}-[0-9a-zA-Z]{4}-[0-9a-zA-Z]{4}-[0-9a-zA-Z]{4}-[0-9a-zA-Z]{12}" />
</xsd:restriction>
</xsd:simpleType>
<xsd:complexType name="xmlDocument">
<xsd:sequence>
<xsd:any />
</xsd:sequence>
</xsd:complexType>
<xsd:complexType name="row">
<xsd:sequence>
<xsd:element sql:field="Customer.Customer Id" name="Customer.Customer_x0020_Id" type="xsd:string" minOccurs="0" />
<xsd:element sql:field="Customer.Title" name="Customer.Title" type="xsd:string" minOccurs="0" />
</xsd:sequence>
</xsd:complexType>
</xsd:schema>
<row>
<Customer.Customer_x0020_Id>11000</Customer.Customer_x0020_Id>
</row>
<row>
<Customer.Customer_x0020_Id>11001</Customer.Customer_x0020_Id>
</row>
<row>
<Customer.Customer_x0020_Id>11002</Customer.Customer_x0020_Id>
</row>
<row>
<Customer.Customer_x0020_Id>11003</Customer.Customer_x0020_Id>
</row>
<row>
<Customer.Customer_x0020_Id>11004</Customer.Customer_x0020_Id>
</row>
</root>
</return>
</ExecuteResponse>
</soap:Body>
</soap:Envelope>
So, my next investigation was using MDX query. I know it's more powerful. And I also can use XMLA for that. But I cannot realize how to get data in "tabular" mode.
Something like that:
select {[Customer].members} on columns
from [Adventure Works Internet Sales Model]
But I cannot reach this goal for now. Can someone help me?