parser: fix compatibility for `OnDelete`,`OnUpdate` clauses#393

Merged

kennytm merged 6 commits into

pingcap:masterfrom

zier-one:fix_alter_table_add_column

Jul 25, 2019

Commits on Jul 18, 2019

fix
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Commits on Jul 19, 2019

fix check for ColumnOption
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add test for match
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Commits on Jul 22, 2019

merge master
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Commits on Jul 25, 2019

Merge remote-tracking branch 'upstream/master' into fix_alter_table_add_column
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use array
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