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https://issues.apache.org/jira/browse/IMPALA-4944?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gabor Kaszab updated IMPALA-4944:
---------------------------------
Labels: catalog-server complextype statistics (was: catalog-server
statistics)
> COMPUTE STATS on non-primitive columns
> --------------------------------------
>
> Key: IMPALA-4944
> URL: https://issues.apache.org/jira/browse/IMPALA-4944
> Project: IMPALA
> Issue Type: Improvement
> Components: Catalog
> Affects Versions: Impala 2.9.0
> Reporter: Miklos Szurap
> Priority: Major
> Labels: catalog-server, complextype, statistics
>
> Currently Impala does not compute the stats for complex-type columns, as per
> the
> [docs|https://www.cloudera.com/documentation/enterprise/latest/topics/impala_compute_stats.html]:
> {quote}
> Currently, the statistics created by the COMPUTE STATS statement do not
> include information about complex type columns. The column stats metrics for
> complex columns are always shown as -1. For queries involving complex type
> columns, Impala uses heuristics to estimate the data distribution within such
> columns.
> {quote}
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