Merge branch 'master' of https://github.com/qiancai/docs

TOC.md

@@ -579,7 +579,7 @@
       - [Bidirectional Replication](/ticdc/ticdc-bidirectional-replication.md)
       - [Data Integrity Validation for Single-Row Data](/ticdc/ticdc-integrity-check.md)
       - [Data Consistency Validation for TiDB Upstream/Downstream Clusters](/ticdc/ticdc-upstream-downstream-check.md)
-      - [TiCDC Behavior Changes](/ticdc/ticdc-behavior-change.md)
+      - [TiCDC Behavior in Splitting UPDATE Events](/ticdc/ticdc-split-update-behavior.md)
     - Monitor and Alert
       - [Monitoring Metrics Summary](/ticdc/ticdc-summary-monitor.md)
       - [Monitoring Metrics Details](/ticdc/monitor-ticdc.md)

dm/dm-worker-intro.md

@@ -55,7 +55,7 @@ The upstream database (MySQL/MariaDB) user must have the following privileges:
 If you need to migrate the data from `db1` to TiDB, execute the following `GRANT` statement:
 
 ```sql
-GRANT RELOAD,REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO 'your_user'@'your_wildcard_of_host'
+GRANT RELOAD,REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO 'your_user'@'your_wildcard_of_host';
 GRANT SELECT ON db1.* TO 'your_user'@'your_wildcard_of_host';
 ```
 

explain-joins.md

@@ -70,7 +70,7 @@ Index join is efficient in memory usage, but might be slower to execute than oth
 SELECT * FROM t1 INNER JOIN t2 ON t1.id=t2.t1_id WHERE t1.pad1 = 'value' and t2.pad1='value';
 ```
 
-In an inner join operation, TiDB implements join reordering and might access either `t1` or `t2` first. Assume that TiDB selects `t1` as the first table to apply the `build` step, and then TiDB is able to filter on the predicate `t1.col = 'value'` before probing the table `t2`. The filter for the predicate `t2.col='value'` will be applied on each probe of table `t2`, which might be less efficient than other join methods.
+In an inner join operation, TiDB implements join reordering and might access either `t1` or `t2` first. Assume that TiDB selects `t1` as the first table to apply the `build` step, and then TiDB is able to filter on the predicate `t1.pad1 = 'value'` before probing the table `t2`. The filter for the predicate `t2.pad1='value'` will be applied on each probe of table `t2`, which might be less efficient than other join methods.
 
 Index join is effective if the build side is small and the probe side is pre-indexed and large. Consider the following query where an index join performs worse than a hash join and is not chosen by the SQL Optimizer:
 

extended-statistics.md

@@ -105,7 +105,7 @@ Other TiDB nodes will read this change and delete the object in their memory cac
 
 ### Export and import extended statistics
 
-The way of exporting or importing extended statistics is the same as exporting or importing basic statistics. See [Introduction to Statistics - Import and export statistics](/statistics.md#import-and-export-statistics) for details.
+The way of exporting or importing extended statistics is the same as exporting or importing basic statistics. See [Introduction to Statistics - Import and export statistics](/statistics.md#export-and-import-statistics) for details.
 
 ## Usage examples for correlation-type extended statistics
 

functions-and-operators/expressions-pushed-down.md

@@ -10,6 +10,10 @@ When TiDB reads data from TiKV, TiDB tries to push down some expressions (includ
 
 TiFlash also supports pushdown for the functions and operators [listed on this page](/tiflash/tiflash-supported-pushdown-calculations.md).
 
+> **Note:**
+>
+> The Aggregate functions do not support pushdown to TiKV when used as [window functions](/functions-and-operators/window-functions.md).
+
 ## Supported expressions for pushdown to TiKV
 
 | Expression Type | Operations |
@@ -26,6 +30,7 @@ TiFlash also supports pushdown for the functions and operators [listed on this p
 | [Encryption and compression functions](/functions-and-operators/encryption-and-compression-functions.md#encryption-and-compression-functions) | [MD5()](/functions-and-operators/encryption-and-compression-functions.md#md5) <br/>[SHA1(), SHA()](/functions-and-operators/encryption-and-compression-functions.md#sha1) <br/>[UNCOMPRESSED_LENGTH()](/functions-and-operators/encryption-and-compression-functions.md#uncompressed_length) |
 | [Cast functions and operators](/functions-and-operators/cast-functions-and-operators.md#cast-functions-and-operators) | [CAST()](/functions-and-operators/cast-functions-and-operators.md#cast) <br/>[CONVERT()](/functions-and-operators/cast-functions-and-operators.md#convert) |
 | [Miscellaneous functions](/functions-and-operators/miscellaneous-functions.md#supported-functions) | [UUID()](/functions-and-operators/miscellaneous-functions.md#uuid) |
+| [Window Functions](/functions-and-operators/window-functions.md) | None |
 
 ## Blocklist specific expressions