[GitHub] [drill] dvjyothsna opened a new pull request #1745: DRILL-7166: Count query with wildcard should skip reading of metadata summary file

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dvjyothsna opened a new pull request #1745: DRILL-7166: Count query with wildcard should skip reading of metadata summary file
URL: https://github.com/apache/drill/pull/1745
 
 
   Count(*) or Count(column) queries use the aggregated row count and null count from the metadata summary file without reading the large file metadata. When the directory filter has a wildcard, count cannot be fetched from the metadata summary file since the summary file contains count of all the children underneath that and there is no way to filter using wild card. The ConvertCountToDirectScan physical rule will be applied to these cases.

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