[LENS-1545] Fixed a Bug and made changes for PreparedQuery

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: api, cube, server
• Assignee: Amareshwari Sriramadasu
• Reporter: Rajashekhar
• Created: 09/Jul/19 08:27
• Updated: 19/Aug/19 15:17

Description

Fixed following Issues in Lens for Azure Migrations

1. Bug in Lens-Metastore for single fact granularity -- https://issues.apache.org/jira/browse/LENS-1544. Explaination: This had a special case for handling facts with one-update-period and multiple-update-periods. The case which handled one-update-period had a bug while generating the name of the hive table whole format is update_period-fact_name, the update_period was coming as null.
2. JDBCDriver.java was invoking JDBC Driver while validating the prepared query, I don't need this functionality so blocking this via already existing config parameter JDBC_VALIDATE_THROUGH_PREPARE.
   2a) Old Flow:

   esitmate()
   --- | --> validate
   -----| --> JDBC_VALIDATE_THROUGH_PREPARE condition to prepare through if condition
   -----|--> prepareInternal()
   ----------------|--> rewrite -- Rewritting take place
   

   2b) New Flow:

   esitmate()
   ---| --> rewrite -- Rewritting take place
   ---| --> validate
   -----| --> JDBC_VALIDATE_THROUGH_PREPARE condition to prepare through if condition
   -----|--> prepareInternal()
   

Issue Links

• links to: GitHub Pull Request #34
• links to: GitHub Pull Request #35