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https://issues.apache.org/jira/browse/IMPALA-10882?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Quanlong Huang updated IMPALA-10882:
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Priority: Critical (was: Major)
> Push down Min-Max predicates of CHAR/VARCHAR to ORC reader
> ----------------------------------------------------------
>
> Key: IMPALA-10882
> URL: https://issues.apache.org/jira/browse/IMPALA-10882
> Project: IMPALA
> Issue Type: Improvement
> Components: Backend
> Reporter: Quanlong Huang
> Priority: Critical
>
> This is a follow-up work of IMPALA-6505. Due to padding/truncation issues of
> CHAR/VARCHAR types when comparing to string literals, we might get wrong
> results if we simply push down CHAR/VARCHAR predicates into the ORC reader,
> especially when the file schema differs from the table schema.
> See more discussion in the Gerrit review:
> https://gerrit.cloudera.org/c/15403/1/be/src/exec/hdfs-orc-scanner.cc#889
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