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Commit 0f820e2b authored by liuxian's avatar liuxian Committed by Sean Owen
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[SPARK-20519][SQL][CORE] Modify to prevent some possible runtime exceptions

Signed-off-by: liuxian <liu.xian3zte.com.cn>

## What changes were proposed in this pull request?

When the input parameter is null, may be a runtime exception occurs

## How was this patch tested?
Existing unit tests

Author: liuxian <liu.xian3@zte.com.cn>

Closes #17796 from 10110346/wip_lx_0428.
parent 2fdaeb52
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