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fix typo in index key encoding format (tableID -> TableID, indexID -> IndexID) #21044

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merged 1 commit into from
Nov 4, 2025
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fix typo in index key encoding format (tableID -> TableID, indexID -> IndexID) #21044

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8 changes: 4 additions & 4 deletions troubleshoot-hot-spot-issues.md
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Original file line number Diff line number Diff line change
Expand Up @@ -21,7 +21,7 @@ TiDB 对每个表分配一个 TableID，每一个索引都会分配一个 IndexI
每行数据按照如下规则进行编码成 Key-Value pair：

```text
Key: tablePrefix{tableID}_recordPrefixSep{rowID}
Key: tablePrefix{TableID}_recordPrefixSep{RowID}
Value: [col1, col2, col3, col4]
```

Expand All @@ -30,14 +30,14 @@ Value: [col1, col2, col3, col4]
对于 Index 数据，会按照如下规则编码成 Key-Value pair：

```text
Key: tablePrefix{tableID}_indexPrefixSep{indexID}_indexedColumnsValue
Key: tablePrefix{TableID}_indexPrefixSep{IndexID}_indexedColumnsValue
Value: rowID
```

Index 数据还需要考虑 Unique Index 和非 Unique Index 两种情况，对于 Unique Index，可以按照上述编码规则。但是对于非 Unique Index，通过这种编码并不能构造出唯一的 Key，因为同一个 Index 的 `tablePrefix{tableID}_indexPrefixSep{indexID}` 都一样，可能有多行数据的 `ColumnsValue` 是一样的，所以对于非 Unique Index 的编码做了一点调整：
Index 数据还需要考虑 Unique Index 和非 Unique Index 两种情况，对于 Unique Index，可以按照上述编码规则。但是对于非 Unique Index，通过这种编码并不能构造出唯一的 Key，因为同一个 Index 的 `tablePrefix{TableID}_indexPrefixSep{IndexID}` 都一样，可能有多行数据的 `ColumnsValue` 是一样的，所以对于非 Unique Index 的编码做了一点调整：

```text
Key: tablePrefix{tableID}_indexPrefixSep{indexID}_indexedColumnsValue_rowID
Key: tablePrefix{TableID}_indexPrefixSep{IndexID}_indexedColumnsValue_rowID
Value: null
```

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2 changes: 1 addition & 1 deletion troubleshoot-write-conflicts.md
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Expand Up @@ -79,7 +79,7 @@ tiup ctl:v<CLUSTER_VERSION> pd -u https://127.0.0.1:2379 tso {TIMESTAMP}
{{< copyable "" >}}

```shell
curl http://{TiDBIP}:10080/db-table/{tableID}
curl http://{TiDBIP}:10080/db-table/{TableID}
```

通过 indexID 查找具体的索引名：
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