wuyi created SPARK-26814:
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Summary: Avoid unnecessary block concatenation while empty block
exists
Key: SPARK-26814
URL: https://issues.apache.org/jira/browse/SPARK-26814
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 2.4.0
Environment: We should always avoid unnecessary block concatenation
while empty block exists among the two Blocks, which avoid redundant code
interpolation for blocks.
Reporter: wuyi
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