v8.5.5: Add index lookup push down content (#20950)#21229

Merged

ti-chi-bot[bot] merged 23 commits intopingcap:feature/preview-v8.5.5from

ti-chi-bot:cherry-pick-20950-to-release-8.5

Jan 13, 2026

Commits on Dec 31, 2025

v8.5.4 tikv: update rocksdb.max-manifest-file-size default value (#20846) (#21227)
ti-chi-bot
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Add index lookup push down content

lcwangchao
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remove sys var

lcwangchao
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add sysvar and NO_INDEX_LOOKUP_PUSHDOWN

lcwangchao
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Update system-variables.md

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Update optimizer-hints.md

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Update optimizer-hints.md

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Update optimizer-hints.md

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Update optimizer-hints.md

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ti-chi-bot
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Update optimizer-hints.md

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Update optimizer-hints.md

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Update optimizer-hints.md

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Update optimizer-hints.md

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remove copyable

Oreoxmt
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Apply suggestions from code review

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Apply suggestions from code review

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Apply suggestions from code review

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Apply suggestions from code review
Oreoxmt
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Discard changes to releases/release-8.5.4.md
Oreoxmt
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Apply suggestions from code review
Oreoxmt
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Discard changes to tikv-configuration-file.md
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Apply suggestions from code review
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Apply suggestions from code review
Oreoxmt
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