v8.5.5: refine modify column (#21110)#21276

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qiancai merged 19 commits intopingcap:release-8.5from

ti-chi-bot:cherry-pick-21110-to-release-8.5

Jan 16, 2026

Commits on Jan 13, 2026

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Update sql-statement-modify-column.md

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Update sql-statement-modify-column.md

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Update documentation for MODIFY COLUMN statement

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revise descriptions

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Update sql-statements/sql-statement-modify-column.md

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revise descriptions

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Update sql-statements/sql-statement-modify-column.md

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fix typo

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Update sql-statements/sql-statement-modify-column.md

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Update sql-statements/sql-statement-modify-column.md

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Update sql-statements/sql-statement-modify-column.md

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remove an empty line

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Update sql-statements/sql-statement-modify-column.md
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