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  1. Apache Drill
  2. DRILL-4476

Enhance Union-All operator for dealing with empty left input or empty both inputs

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    Description

      Union-All operator does not deal with the situation where left side comes from empty source.

      Due to DRILL-2288's enhancement for empty sources, Union-All operator now can be allowed to support this scenario.

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          incorporates

          Bug - A problem which impairs or prevents the functions of the product. DRILL-4472 Pushing Filter past Union All fails: DRILL-3257 regressed DRILL-2746 but unit test update break test goal

          • Major - Major loss of function.
          • Closed
          is related to

          Bug - A problem which impairs or prevents the functions of the product. DRILL-5327 Hash aggregate can return empty batch which can cause schema change exception

          • Major - Major loss of function.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. DRILL-5546 Schema change problems caused by empty batch

          • Major - Major loss of function.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. DRILL-2288 ScanBatch violates IterOutcome protocol for zero-row sources [was: missing JDBC metadata (schema) for 0-row results...]

          • Major - Major loss of function.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. DRILL-4510 IllegalStateException: Failure while reading vector. Expected vector class of org.apache.drill.exec.vector.NullableIntVector but was holding vector class org.apache.drill.exec.vector.NullableVarCharVector

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

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              seanhychu Sean Hsuan-Yi Chu
              seanhychu Sean Hsuan-Yi Chu
              Khurram Faraaz Khurram Faraaz
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                Created:
                Updated:
                Resolved: