expression: the quote function should treat null expr as NULL literal string instead of NULL (#11592)#13681
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zz-jason merged 4 commits intopingcap:release-2.1from Nov 26, 2019
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zz-jason
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Nov 25, 2019
…upstream-release-2.1
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@SunRunAway merge failed. |
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Automated cherry pick of #11592 on release-2.1.
What problem does this PR solve?
Fix #11556 QUOTE(null) should return 'NULL' string instead of NULL value
What is changed and how it works?
if the expr is NULL, then the value for quote(expr) will be "NULL" instead of NULL.
Check List
Tests
Side effects