ElasticSearch Connector for SSAS
In this article you will learn how to integrate Using ElasticSearch Connector you will be able to connect, read, and write data from within SSAS. Follow the steps below to see how we would accomplish that. The driver mentioned above is part of ODBC PowerPack which is a collection of high-performance Drivers for various API data source (i.e. REST API, JSON, XML, CSV, Amazon S3 and many more). Using familiar SQL query language you can make live connections and read/write data from API sources or JSON / XML / CSV Files inside SQL Server (T-SQL) or your favorite Reporting (i.e. Power BI, Tableau, Qlik, SSRS, MicroStrategy, Excel, MS Access), ETL Tools (i.e. Informatica, Talend, Pentaho, SSIS). You can also call our drivers from programming languages such as JAVA, C#, Python, PowerShell etc. If you are new to ODBC and ZappySys ODBC PowerPack then check the following links to get started. |
Connect to ElasticSearch in other apps
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Create Data Source in ZappySys Data Gateway based on API Driver
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Download and install ZappySys ODBC PowerPack.
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Search for gateway in start menu and Open ZappySys Data Gateway:
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Go to Users Tab to add our first Gateway user. Click Add; we will give it a name tdsuser and enter password you like to give. Check Admin option and click OK to save. We will use these details later when we create linked server:
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Now we are ready to add a data source. Click Add, give data source a name (Copy this name somewhere, we will need it later) and then select Native - ZappySys API Driver. Finally, click OK. And it will create the Data Set for it and open the ZS driver UI.
ElasticSearchDSN
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When the Configuration window appears give your data source a name if you haven't done that already, then select "ElasticSearch" from the list of Popular Connectors. If "ElasticSearch" is not present in the list, then click "Search Online" and download it. Then set the path to the location where you downloaded it. Finally, click Continue >> to proceed with configuring the DSN:
ElasticSearchDSNElasticSearch -
Now it's time to configure the Connection Manager. Select Authentication Type, e.g. Token Authentication. Then select API Base URL (in most cases, the default one is the right one). More info is available in the Authentication section.
Fill in all required parameters and set optional parameters if needed:
ElasticSearchDSNElasticSearchBasic Authentication (UserId/Password) [Http]http://localhost:9200Required Parameters Optional Parameters UserName Fill in the parameter... Password Fill in the parameter... IgnoreSSLCertificateErrors Fill in the parameter... Fill in all required parameters and set optional parameters if needed:
ElasticSearchDSNElasticSearchWindows Authentication (No Password) [Http]http://localhost:9200Required Parameters Optional Parameters IgnoreSSLCertificateErrors Fill in the parameter... -
Once the data source has been configured, you can preview data. Select the Preview tab and use settings similar to the following to preview data:
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Click OK to finish creating the data source.
Read ElasticSearch data in SSAS cube
With the data source created in the Data Gateway (previous step), we're now ready to read ElasticSearch data in an SSAS cube. Before we dive in, open Visual Studio and create a new Analysis Services project. Then, you're all set!
Create data source based on ZappySys Data Gateway
Let's start by creating a data source for a cube, based on the Data Gateway's data source we created earlier. So, what are we waiting for? Let's do it!
- Create a new data source:
- Once a window opens, select Create a data source based on an existing or new connection option and click New...:
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Here things become a little complicated, but do not despair, it's only for a little while.
Just perform these little steps:
- Select Native OLE DB\SQL Server Native Client 11.0 as provider.
- Enter your Server name (or IP address) and Port, separated by a comma.
- Select SQL Server Authentication option for authentication.
- Input User name which has admin permissions in the ZappySys Data Gateway.
- In Database name field enter the same data source name you use in the ZappySys Data Gateway.
- Hopefully, our hard work is done, when we Test Connection.
ElasticSearchDSNElasticSearchDSNIf SQL Server Native Client 11.0 is not listed as Native OLE DB provider, try using these:- Microsoft OLE DB Driver for SQL Server
- Microsoft OLE DB Provider for SQL Server
- Indeed, life is easy again:
Add data source view
We have data source in place, it's now time to add a data source view. Let's not waste a single second and get on to it!
- Start by right-clicking on Data Source Views and then choosing New Data Source View...:
- Select the previously created data source and click Next:
- Ignore the Name Matching window and click Next.
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Add the tables you will use in your SSAS cube:
For cube dimensions, consider creating a Virtual Table in the Data Gateway's data source. Use the
DISTINCT
keyword in theSELECT
statement to get unique values from the facts table, like this:SELECT DISTINCT Country FROM Customers
For demonstration purposes we are using sample tables which may not be available in ElasticSearch. - Review your data source view and click Finish:
- Add the missing table relationships and you're done!
Create cube
We have a data source view ready to be used by our cube. Let's create one!
- Start by right-clicking on Cubes and selecting New Cube... menu item:
- Select tables you will use for the measures:
- And then select the measures themselves:
- Don't stop and select the dimensions too:
- Move along and click Finish before the final steps:
- Review your cube before processing it:
- It's time for the grand finale! Hit Process... to create the cube:
- A splendid success!
Execute MDX query
The cube is created and processed. It's time to reap what we sow! Just execute an MDX query and get ElasticSearch data in your SSAS cube:
Advanced topics
Create Custom Stored Procedure in ZappySys Driver
You can create procedures to encapsulate custom logic and then only pass handful parameters rather than long SQL to execute your API call.
Steps to create Custom Stored Procedure in ZappySys Driver. You can insert Placeholders anywhere inside Procedure Body. Read more about placeholders here
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Go to Custom Objects Tab and Click on Add button and Select Add Procedure:
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Enter the desired Procedure name and click on OK:
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Select the created Stored Procedure and write the your desired stored procedure and Save it and it will create the custom stored procedure in the ZappySys Driver:
Here is an example stored procedure for ZappySys Driver. You can insert Placeholders anywhere inside Procedure Body. Read more about placeholders here
CREATE PROCEDURE [usp_get_orders] @fromdate = '<<yyyy-MM-dd,FUN_TODAY>>' AS SELECT * FROM Orders where OrderDate >= '<@fromdate>';
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That's it now go to Preview Tab and Execute your Stored Procedure using Exec Command. In this example it will extract the orders from the date 1996-01-01:
Exec usp_get_orders '1996-01-01';
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Let's generate the SQL Server Query Code to make the API call using stored procedure. Go to Code Generator Tab, select language as SQL Server and click on Generate button the generate the code.
As we already created the linked server for this Data Source, in that you just need to copy the Select Query and need to use the linked server name which we have apply on the place of [MY_API_SERVICE] placeholder.
SELECT * FROM OPENQUERY([MY_API_SERVICE], 'EXEC usp_get_orders @fromdate=''1996-07-30''')
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Now go to SQL served and execute that query and it will make the API call using stored procedure and provide you the response.
Create Custom Virtual Table in ZappySys Driver
ZappySys API Drivers support flexible Query language so you can override Default Properties you configured on Data Source such as URL, Body. This way you don't have to create multiple Data Sources if you like to read data from multiple EndPoints. However not every application support supplying custom SQL to driver so you can only select Table from list returned from driver.
If you're dealing with Microsoft Access and need to import data from an SQL query, it's important to note that Access doesn't allow direct import of SQL queries. Instead, you can create custom objects (Virtual Tables) to handle the import process.
Many applications like MS Access, Informatica Designer wont give you option to specify custom SQL when you import Objects. In such case Virtual Table is very useful. You can create many Virtual Tables on the same Data Source (e.g. If you have 50 URLs with slight variations you can create virtual tables with just URL as Parameter setting.
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Go to Custom Objects Tab and Click on Add button and Select Add Table:
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Enter the desired Table name and click on OK:
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And it will open the New Query Window Click on Cancel to close that window and go to Custom Objects Tab.
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Select the created table, Select Text Type AS SQL and write the your desired SQL Query and Save it and it will create the custom table in the ZappySys Driver:
Here is an example SQL query for ZappySys Driver. You can insert Placeholders also. Read more about placeholders here
SELECT "ShipCountry", "OrderID", "CustomerID", "EmployeeID", "OrderDate", "RequiredDate", "ShippedDate", "ShipVia", "Freight", "ShipName", "ShipAddress", "ShipCity", "ShipRegion", "ShipPostalCode" FROM "Orders" Where "ShipCountry"='USA'
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That's it now go to Preview Tab and Execute your custom virtual table query. In this example it will extract the orders for the USA Shipping Country only:
SELECT * FROM "vt__usa_orders_only"
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Let's generate the SQL Server Query Code to make the API call using stored procedure. Go to Code Generator Tab, select language as SQL Server and click on Generate button the generate the code.
As we already created the linked server for this Data Source, in that you just need to copy the Select Query and need to use the linked server name which we have apply on the place of [MY_API_SERVICE] placeholder.
SELECT * FROM OPENQUERY([MY_API_SERVICE], 'EXEC [usp_get_orders] ''1996-01-01''')
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Now go to SQL served and execute that query and it will make the API call using stored procedure and provide you the response.
Actions supported by ElasticSearch Connector
ElasticSearch Connector support following actions for REST API integration. If some actions are not listed below then you can easily edit Connector file and enhance out of the box functionality.Parameter | Description |
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New Index Name |
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Parameter | Description |
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Index to delete |
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Parameter | Description |
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Parameter | Description |
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Index |
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Alias |
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Parameter | Description |
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Index |
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Alias |
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Enter Document ID |
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Parameter | Description | ||||||||
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Index or Alias Name (choose one --OR-- enter * --OR-- comma seperated names) |
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Enter Query (JSON Format) |
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Parameter | Description |
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Index |
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Alias |
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Parameter | Description |
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Index |
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Alias |
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Parameter | Description |
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Index |
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Alias |
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Parameter | Description |
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Index |
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Parameter | Description |
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Url |
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Body |
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IsMultiPart |
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Filter |
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Headers |
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ElasticSearch Connector Examples for SSAS Connection
This page offers a collection of SQL examples designed for seamless integration with the ZappySys API ODBC Driver under ODBC Data Source (36/64) or ZappySys Data Gateway, enhancing your ability to connect and interact with Prebuilt Connectors effectively.
Create a new index (i.e. Table) [Read more...]
Create a new index (i.e. Create a new table). To trow error if table exists you can set ContineOnErrorForStatusCode=0
SELECT * FROM create_index WITH(Name='my_new_index_name', ContineOnErrorForStatusCode=1)
Delete an exising index (i.e. Table) [Read more...]
Delete an exising index. It it exists it will show status code 400
SELECT * FROM delete_index WITH(Name='my_index_name', ContineOn404Error=1 )
Generic API Call for ElasticSearch [Read more...]
When EndPoint not defined and you like to call some API use this way. Below example shows how to call CREATE INDEX API generic way. See other generic API call examples.
SELECT * FROM generic_request
WITH(Url='/my_index_name'
, RequestMethod='PUT'
-- , Body='{}'
-- , Headers='X-Hdr1:aaa || x-HDR2: bbb'
, Meta='acknowledged:bool'
)
List indexes [Read more...]
Lists indexes
SELECT * FROM Indexes
Get index metadata [Read more...]
Gets index metadata
SELECT * FROM get_index_metadata WITH (Index='my_index_name')
Read ElasticSearch documents from Index (all or with filter) [Read more...]
Gets documents by index name (i.e. Table name) or alias name (i.e. View name). Using WHERE clause invokes client side engine so try to avoid WHERE clause and use WITH clause QUERY attribute. Use search endpoint instead to invoke query.
SELECT * FROM MyIndexOrAliasName --WITH(Query='{"match": { "PartNumber" : "P50" } }')
Read ElasticSearch documents from Alias (all or with filter) [Read more...]
Gets documents by index name (i.e. Table name) or alias name (i.e. View name). Using WHERE clause invokes client side engine so try to avoid WHERE clause and use WITH clause QUERY attribute. Use search endpoint instead to invoke query.
SELECT * FROM MyIndexOrAliasName --WITH(Query='{"match": { "PartNumber" : "P50" } }')
Search documents from Index using ElasticSearch Query language [Read more...]
Below example shows how to search on a comment field for TV word anywhere in the text for Index named MyIndexOrAliasName (it can be index name or alias name). For more information on ElasticSearch Query expression check this link https://www.elastic.co/guide/en/elasticsearch/reference/6.8/query-dsl-match-query.html
SELECT * FROM MyIndexOrAliasName WITH(Query='{"match": { "comment" : "TV" } }')
--or use below - slight faster (avoids table / alias list validation)
--SELECT * FROM search WITH(Index='MyIndexName', Query='{"match": { "comment" : "TV" } }')
--SELECT * FROM search WITH(Index='MyIndexName', Alias='MyAliasName', Query='{"match": { "comment" : "TV" } }')
Search documents from Alias using ElasticSearch Query language [Read more...]
Below example shows how to search on Alias rather than Index name. Alias is build on index (consider like a view in RDBMS). This example filtes data from Alias with some condition in the Query Text. For more information on ElasticSearch Query expression check this link https://www.elastic.co/guide/en/elasticsearch/reference/6.8/query-dsl-match-query.html
SELECT * FROM MyAliasName WITH(Query='{"match": { "comment" : "TV" } }')
--or use search endpoint then you must supply both Index name and Alias name
--calling /search endpoint in FROM clause is slight faster (avoids table / alias list validation)
--SELECT * FROM search WITH(Index='MyIndexName',Index='MyAliasName', Query='{"match": { "comment" : "TV" } }')
Count ElasticSearch index documents using ElasticSearch Query language [Read more...]
Below example shows how to get just count of documents from Index (single, multiple or all index). Optionally you can supply expression to filter. For more information on ElasticSearch Query expression check this link https://www.elastic.co/guide/en/elasticsearch/reference/6.8/query-dsl-match-query.html
SELECT * FROM count WITH(Index='MyIndexOrAliasName') --//get count of documents in index / alias named MyIndexOrAliasName
SELECT * FROM count WITH(Index='*') --//get count of documents in all indices (total distinct _id found across all indices + alias)
SELECT * FROM count WITH(Index='MyIndex1,MyIndex2,MyAlias1,MyAlias2')--//get count of documents in indices named MyIndex1, MyIndex2 and Alias named MyAlias1,MyAlias2
SELECT * FROM count WITH(Index='MyIndexOrAliasName', Query='{"match": { "comment" : "TV" } }') --//get count of documents in MyIndex where comment field contains word "TV"
Count ElasticSearch alias documents using ElasticSearch Query language [Read more...]
Below example shows how to get just count of documents from Alias (single, multiple or all alias). Optionally you can supply expression to filter. For more information on ElasticSearch Query expression check this link https://www.elastic.co/guide/en/elasticsearch/reference/6.8/query-dsl-match-query.html
SELECT * FROM count WITH(Index='MyIndexOrAliasName') --//get count of documents in index / alias named MyIndexOrAliasName
SELECT * FROM count WITH(Index='*') --//get count of documents in all indices (total distinct _id found across all indices + alias)
SELECT * FROM count WITH(Index='MyIndexOrAlias1,MyIndexOrAlias2') --//get count of documents in MyIndex1 and MyIndex2
SELECT * FROM count WITH(Index='MyIndex', Query='{"match": { "comment" : "TV" } }') --//get count of documents in Index named MyIndex where comment field contains word "TV"
SELECT * FROM count WITH(Index='MyAlias', Query='{"match": { "comment" : "TV" } }') --//get count of documents in Alias named MyAlias where comment field contains word "TV"
Using JSON Array / Value functions [Read more...]
Below example shows how to select specific elements from value array or use JSON PATH expression to extract from document array
SELECT _id
, JSON_ARRAY_FIRST(colors) as first_color
, JSON_ARRAY_LAST(colors) as last_color
, JSON_ARRAY_NTH(colors,3) as third_color
, JSON_VALUE(locationList,'$.locationList[0].country') as first_preferred_country
, JSON_VALUE(locationList,'$.locationList[?(@country=='India')].capital as capital_of_india
FROM shop WHERE _Id='1'
Insert documents into index with _id autogenerated [Read more...]
When you dont supply _id column value, ElasticSearch will generate it automatically for you.
INSERT INTO MyIndex([MyCol1], [MyCol2] ) VALUES (100, 'A1')
Insert documents into index with your own _id [Read more...]
Inserts documents into index with _id column. _id is string datatype so can be
INSERT INTO MyIndex(_id, [MyCol1], [MyCol2] ) VALUES ('A1234', 100, 'A1')
Insert documents using nested attribute and raw fragments (JSON sub-documents, arrays) [Read more...]
This example produces JSON document like this {"_id": "some_auto_generated_id" , "Location": { "City" : "Atlanta" , "ZipCode" : "30060" },"ColorsArray ": ["Red", "Blue", "Green"],"SomeNestedDoc": { "Col1" : "aaa" , "Col2" : "bbb" , "Col2" : "ccc" }} . Notice that how Column name with Dot translated into nested Columns (i.e. City, ZipCode) and Prefix raw:: allowed to treat value as array or sub document.
INSERT INTO MyIndexName ([Location.City], [Location.ZipCode], [raw::ColorsArray], [raw::SomeNestedDoc] )
VALUES ('A1234', 'Atlanta', '30060', '["red","green","blue"]', '{"Col1":"aaa","Col2":"bbb","Col3":"ccc"}' )
Insert raw document (_rawdoc_ usage) [Read more...]
This example shows how to insert document(s) in a raw format. When you use column name _rawdoc_ then its treated as RAW body. Notice that we use @ before string literal in value. This allow to use escape sequence (in this case \n for new line).
INSERT INTO shop(_RAWDOC_)
VALUES(@'{"create":{"_index":"shop","_id":"1"}}\n{"name":"record-1","colors":["yellow","orange"]}\n{"create":{"_index":"shop","_id":"2"}}\n{"name":"record-2","colors":["red","blue"]}\n')
Update documents in index [Read more...]
Updates documents in index
UPDATE MyIndex
SET Col1 = 'NewValue-1', Col2 = 'NewValue-2'
WHERE _Id = 'A1234'
Update raw document (_rawdoc_ usage) [Read more...]
This example shows how to update document(s) in a raw format. When you use column name _rawdoc_ then its treated as RAW body. Notice that we use @ before string literal in value. This allow to use escape sequence (in this case \n for new line).
UPDATE shop SET _rawdoc_ = @'{"update": {"_index": "shop", "_id": "1"}}\n{ "doc": {"colors":["yellow","orange"] } }\n{"update": {"_index": "shop", "_id": "2"}}\n{ "doc": {"colors":["yellow","blue"] } }\n'
Update array or sub document [Read more...]
This example shows how to update Array / nested Sub-document by adding raw:: prefix infront of column name to treat column as json fragment
UPDATE MyIndex
SET name = 'abcd', [raw::colors]='["yellow","red"]', [raw::location]='{x:10, y:20}'
WHERE _id='1'
Delete documents from index [Read more...]
Deletes documents from index
DELETE MyIndex WHERE _id = 'A1234'
Conclusion
In this article we discussed how to connect to ElasticSearch in SSAS and integrate data without any coding. Click here to Download ElasticSearch Connector for SSAS and try yourself see how easy it is. If you still have any question(s) then ask here or simply click on live chat icon below and ask our expert (see bottom-right corner of this page).
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ElasticSearch ODBC Driver | ODBC Driver for ElasticSearch | ODBC ElasticSearch Driver | SSIS ElasticSearch Source | SSIS ElasticSearch Destination
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