shenh062326 opened a new pull request #1410: [CALCITE-3287] Fix minor bug, getRowCount for union in RelMdRowCount.java not consider 'union all' URL: https://github.com/apache/calcite/pull/1410 Issue was illustrated in https://issues.apache.org/jira/browse/CALCITE-3287, Change getRowCount for union in RelMdRowCount.java to call Union.estimateRowCount.
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