reference: add a description of max-index-length by zimulala · Pull Request #2748 · pingcap/docs-cn

zimulala · 2020-04-14T13:03:02Z

What is changed, added or deleted? (Required)

Add a description of max-index-length.
Related to pingcap/tidb#15012.

Which TiDB version(s) do your changes apply to? (Required)

If you select two or more versions from above, to trigger the bot to cherry-pick this PR to your desired release version branch(es), you must add corresponding labels such as needs-cherry-pick-4.0, needs-cherry-pick-3.1, needs-cherry-pick-3.0, and needs-cherry-pick-2.1.

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TomShawn · 2020-04-14T13:30:52Z

LGTM
@zimulala Please involve a technical review.

zimulala · 2020-04-15T02:28:50Z

PTAL @bb7133 @AilinKid

AilinKid

Rest LGTM

AilinKid · 2020-04-15T02:39:17Z

+
+### `max-index-length`
+
+ 用于设置新建索引的长度限制。


should put the difference with MySQL's link here?

+1, we can add a little more explainations here.

MySQL does not have this item.

@bb7133 @AilinKid PTAL

AilinKid

LGTM

TomShawn · 2020-04-15T09:10:56Z

+
+ 用于设置新建索引的长度限制。
+ 默认值：3072
+ 单位：byte，目前的合法值范围 [3072, 3072*4]。MySQL 和 TiDB v3.0.11 之前版本没有此配置项，不过都对新建索引的长度做了限制。MySQL 对此的长度限制为 3072，TiDB 在 v3.0.7 以及之前版本此值为 3072*4。为了与 MySQL 和 TiDB 之前版本的兼容，添加了此配置项。


@zimulala v3.0.11 and v3.0.7, the versions seem inconsistent. If this is correct, I may wonder:

what's the default length limit between v3.0.7 and v3.0.11.

when this limit (default value) changed from 3072*4 to 3072.

what's the default length limit between v3.0.7 and v3.0.11.

when this limit (default value) changed from 3072*4 to 3072.

3.0.11

Suggested change

+ 单位：byte，目前的合法值范围 [3072, 3072*4]。MySQL 和 TiDB v3.0.11 之前版本没有此配置项，不过都对新建索引的长度做了限制。MySQL 对此的长度限制为 3072，TiDB 在 v3.0.7 以及之前版本此值为 3072*4。为了与 MySQL 和 TiDB 之前版本的兼容，添加了此配置项。

+ 单位：byte

+ 目前的合法值范围 `[3072, 3072*4]`。MySQL 和 TiDB v3.0.11 之前版本（不包含 v3.0.11）没有此配置项，不过都对新建索引的长度做了限制。MySQL 对此的长度限制为 `3072`，TiDB 在 v3.0.7 以及之前版本该值为 `3072*4`，在 v3.0.7 之后的该值为 `3072`。为了与 MySQL 和 TiDB 之前版本的兼容，添加了此配置项。

@TomShawn Done.

Signed-off-by: sre-bot <sre-bot@pingcap.com>

sre-bot · 2020-04-15T10:07:01Z

cherry pick to release-3.0 in PR #2764

Signed-off-by: sre-bot <sre-bot@pingcap.com>

sre-bot · 2020-04-15T10:07:43Z

cherry pick to release-3.1 in PR #2765

sre-bot · 2020-04-15T10:09:29Z

cherry pick to release-4.0 in PR #2766

Co-authored-by: Lynn <zimu_xia@126.com>

* cherry pick #2748 to release-3.1 Signed-off-by: sre-bot <sre-bot@pingcap.com> * *: fix conflicts Co-authored-by: Lynn <zimu_xia@126.com>

* cherry pick #2748 to release-3.0 Signed-off-by: sre-bot <sre-bot@pingcap.com> * *: fix conflicts Co-authored-by: Lynn <zimu_xia@126.com>

reference: add max-index-length

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zimulala added needs-cherry-pick-3.1 labels Apr 14, 2020

TomShawn added the translation/doing This PR’s assignee is translating this PR. label Apr 14, 2020

TomShawn self-assigned this Apr 14, 2020

AilinKid reviewed Apr 15, 2020

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*: add comments

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reference/configuration/tidb-server: address comments

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zimulala force-pushed the max-index-length branch from ed4f083 to 08bf0ad Compare April 15, 2020 09:59

reference/configuration/tidb-server: tiny update

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zimulala force-pushed the max-index-length branch from 6024f94 to de6fff6 Compare April 15, 2020 10:02

Merge branch 'master' into max-index-length

a0c2a28

zimulala merged commit 6050271 into pingcap:master Apr 15, 2020

zimulala deleted the max-index-length branch April 15, 2020 10:06

sre-bot pushed a commit to sre-bot/docs-cn that referenced this pull request Apr 15, 2020

cherry pick pingcap#2748 to release-3.0

476508b

Signed-off-by: sre-bot <sre-bot@pingcap.com>

sre-bot mentioned this pull request Apr 15, 2020

reference: add a description of max-index-length (#2748) #2764

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sre-bot pushed a commit to sre-bot/docs-cn that referenced this pull request Apr 15, 2020

cherry pick pingcap#2748 to release-3.1

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Signed-off-by: sre-bot <sre-bot@pingcap.com>

sre-bot mentioned this pull request Apr 15, 2020

reference: add a description of max-index-length (#2748) #2765

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sre-bot pushed a commit to sre-bot/docs-cn that referenced this pull request Apr 15, 2020

reference: add a description of max-index-length (pingcap#2748)

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sre-bot mentioned this pull request Apr 15, 2020

reference: add a description of max-index-length (#2748) #2766

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TomShawn pushed a commit that referenced this pull request Apr 15, 2020

reference: add a description of max-index-length (#2748) (#2766)

23beea4

Co-authored-by: Lynn <zimu_xia@126.com>

TomShawn pushed a commit that referenced this pull request Apr 15, 2020

reference: add a description of max-index-length (#2748) (#2765)

53bf5d8

* cherry pick #2748 to release-3.1 Signed-off-by: sre-bot <sre-bot@pingcap.com> * *: fix conflicts Co-authored-by: Lynn <zimu_xia@126.com>

TomShawn pushed a commit that referenced this pull request Apr 15, 2020

reference: add a description of max-index-length (#2748) (#2764)

63b7e58

* cherry pick #2748 to release-3.0 Signed-off-by: sre-bot <sre-bot@pingcap.com> * *: fix conflicts Co-authored-by: Lynn <zimu_xia@126.com>

TomShawn mentioned this pull request Apr 16, 2020

reference: add a description of max-index-length pingcap/docs#2303

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TomShawn added translation/done This PR has been translated from English into Chinese and updated to pingcap/docs-cn in a PR. and removed translation/doing This PR’s assignee is translating this PR. labels Apr 16, 2020

This was referenced Apr 21, 2020

reference: add a description of max-index-length (#2303) pingcap/docs#2352

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reference: add a description of max-index-length (#2303) pingcap/docs#2353

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reference: add a description of max-index-length (#2303) pingcap/docs#2354

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rleungx pushed a commit to rleungx/docs-cn that referenced this pull request May 22, 2020

reference: add a description of max-index-length (pingcap#2748)

c6251ed


		### `max-index-length`

		+ 用于设置新建索引的长度限制。

	+ 单位：byte，目前的合法值范围 [3072, 30724]。MySQL 和 TiDB v3.0.11 之前版本没有此配置项，不过都对新建索引的长度做了限制。MySQL 对此的长度限制为 3072，TiDB 在 v3.0.7 以及之前版本此值为 30724。为了与 MySQL 和 TiDB 之前版本的兼容，添加了此配置项。
	+ 单位：byte
	+ 目前的合法值范围 `[3072, 30724]`。MySQL 和 TiDB v3.0.11 之前版本（不包含 v3.0.11）没有此配置项，不过都对新建索引的长度做了限制。MySQL 对此的长度限制为 `3072`，TiDB 在 v3.0.7 以及之前版本该值为 `30724`，在 v3.0.7 之后的该值为 `3072`。为了与 MySQL 和 TiDB 之前版本的兼容，添加了此配置项。

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zimulala commented Apr 14, 2020 • edited by TomShawn Loading Uh oh! There was an error while loading. Please reload this page.

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zimulala commented Apr 14, 2020 •

edited by TomShawn

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