[teiid-issues] [JBoss JIRA] (TEIID-4455) Impala Translator - Change planning step for from_unixtime() pushdown
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https://issues.jboss.org/browse/TEIID-4455?page=com.atlassian.jira.plugin...
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Steven Hawkins commented on TEIID-4455:
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Yes, this is a change in the engine logic starting in the QueryRewriter. The rewriter is
replacing from_unixtime with the timestampadd equivalent - that needs moved to be a much
later operation probably in LanguageBridgeFactory based upon the actual support. Also the
logic for function support needs to be updated so that pushdown support for from_unixtime
checks both for from_unixtime and timestampadd. Finally from_unix time needs to be added
as a SourceSystemFunction and added to the getSupportedFunctions list for hive/impala.
Impala Translator - Change planning step for from_unixtime()
pushdown
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Key: TEIID-4455
URL: https://issues.jboss.org/browse/TEIID-4455
Project: Teiid
Issue Type: Feature Request
Components: JDBC Connector
Reporter: Don Krapohl
Assignee: Kylin Soong
Priority: Minor
Labels: Impala_Translator
Fix For: 9.2
Impala and Teiid both have from_unixtime() functions and per the forum reference the
mapping to timestampadd() appears to come before the test for pushdown support of the
impala native function.
As a query request we require the impala from_unixtime() function be executed instead of
the Teiid-native version.
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