[teiid-issues] [JBoss JIRA] (TEIID-4284) Implement Salesforce Bulk API for SELECTS to Salesforce Connector

[Steven Hawkins (JIRA)]

     [ https://issues.jboss.org/browse/TEIID-4284?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steven Hawkins resolved TEIID-4284.
-----------------------------------
    Resolution: Done


For the first phase of this the implementation an explicit source hint is required:

select /*+ sh salesforce:'bulk' */ name, id ... from Account

here the the source name is salesforce.  

We'll do a minimal amount of validation, such that it's not a relationship query and doesn't use sum/count aggregates, etc.  The default 100,000 chunk size will be used.

A follow on to this if needed would be to detect when bulk/pk chunking should be used - such as against the tables listed in https://developer.salesforce.com/docs/atlas.en-us.api_asynch.meta/api_asynch/async_api_headers_enable_pk_chunking.htm and if the cardinality of the tables are greater than 10,000,000 and there is no of seemingly low filtering predicates.

Also I did not yet convert the insert logic to csv, but that is possible also.



> Implement Salesforce Bulk API for SELECTS to Salesforce Connector
> -----------------------------------------------------------------
>
>                 Key: TEIID-4284
>                 URL: https://issues.jboss.org/browse/TEIID-4284
>             Project: Teiid
>          Issue Type: Feature Request
>          Components: Salesforce Connector
>    Affects Versions: 8.13.5
>         Environment: With Salesforce datasource
>            Reporter: sameer P
>            Assignee: Steven Hawkins
>             Fix For: 9.1
>
>
> There is some huge data (many GBs) in the Salesforce which has around 1.5 million rows and doing some simple select * on it fails with QUERY_TIMEOUT.  
> The salesforce guys suggested to try Bulk API for select with PK chunking as stated in https://developer.salesforce.com/docs/atlas.en-us.api_asynch.meta/api_asynch/asynch_api_code_curl_walkthrough_pk_chunking.htm . 



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