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Merged
ti-srebot merged 2 commits into from
Jun 16, 2020
Merged

Fix sql-statement: use, update, truncate, trace (#2889) #2907

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dfa9b90
cherry pick #2889 to release-4.0
tangenta Jun 16, 2020
b36d709
Merge branch 'release-4.0' into release-4.0-c98a36e70f25
ti-srebot Jun 16, 2020
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135 changes: 30 additions & 105 deletions sql-statements/sql-statement-trace.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -21,112 +21,37 @@ The `TRACE` statement provides detailed information about query execution. It is

## Examples

{{< copyable "sql" >}}

```sql
trace format='row' select * from mysql.user;
```

```
+--------------------------------------------+-----------------+------------+
| operation | startTS | duration |
+--------------------------------------------+-----------------+------------+
| trace | 17:03:31.938237 | 886.086µs |
| ├─session.Execute | 17:03:31.938247 | 507.812µs |
| │ ├─session.ParseSQL | 17:03:31.938254 | 22.504µs |
| │ ├─executor.Compile | 17:03:31.938321 | 278.931µs |
| │ │ └─session.getTxnFuture | 17:03:31.938337 | 1.515µs |
| │ └─session.runStmt | 17:03:31.938613 | 109.578µs |
| │ ├─TableReaderExecutor.Open | 17:03:31.938645 | 50.657µs |
| │ │ └─distsql.Select | 17:03:31.938666 | 21.066µs |
| │ │ └─RPCClient.SendRequest | 17:03:31.938799 | 158.411µs |
| │ └─session.CommitTxn | 17:03:31.938705 | 12.06µs |
| │ └─session.doCommitWitRetry | 17:03:31.938709 | 2.437µs |
| ├─*executor.TableReaderExecutor.Next | 17:03:31.938781 | 224.327µs |
| └─*executor.TableReaderExecutor.Next | 17:03:31.939019 | 6.266µs |
+--------------------------------------------+-----------------+------------+
13 rows in set (0.00 sec)
```

{{< copyable "sql" >}}

```sql
mysql> trace format='row' select * from mysql.user;
+---------------------------+-----------------+------------+
| operation | startTS | duration |
+---------------------------+-----------------+------------+
| session.getTxnFuture | 10:33:34.647148 | 3.847µs |
| ├─session.Execute | 10:33:34.647146 | 536.233µs |
| ├─session.ParseSQL | 10:33:34.647182 | 19.868µs |
| ├─executor.Compile | 10:33:34.647219 | 295.688µs |
| ├─session.runStmt | 10:33:34.647533 | 116.229µs |
| ├─session.CommitTxn | 10:33:34.647631 | 5.44µs |
| ├─recordSet.Next | 10:33:34.647707 | 833.103µs |
| ├─tableReader.Next | 10:33:34.647709 | 806.783µs |
| ├─recordSet.Next | 10:33:34.648572 | 19.367µs |
| └─tableReader.Next | 10:33:34.648575 | 1.783µs |
+---------------------------+-----------------+------------+
10 rows in set (0.00 sec)

mysql> CREATE TABLE t1 (id int not null primary key AUTO_INCREMENT);
Query OK, 0 rows affected (0.11 sec)

mysql> INSERT INTO t1 VALUES (1),(2),(3),(4),(5);
Query OK, 5 rows affected (0.02 sec)
Records: 5 Duplicates: 0 Warnings: 0

mysql> TRACE FORMAT='json' SELECT * FROM t1 WHERE id = 2\G
operation: [
{"ID":{"Trace":"60d20d005593de87","Span":"44e5b309242ffe2f","Parent":"79d146dac9a29a7e"},
"Annotations":[
{"Key":"Name","Value":"c2Vzc2lvbi5nZXRUeG5GdXR1cmU="},
{"Key":"_schema:name","Value":null},
{"Key":"Span.Start","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDE2MTQ3ODYtMDY6MDA="},
{"Key":"Span.End","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDE2MjA0MDYtMDY6MDA="},
{"Key":"_schema:Timespan","Value":null}
],
"Sub":[
{"ID":{"Trace":"60d20d005593de87","Span":"4dbf8f2ca373b4b0","Parent":"79d146dac9a29a7e"},
"Annotations":[
{"Key":"Name","Value":"c2Vzc2lvbi5QYXJzZVNRTA=="},
{"Key":"_schema:name","Value":null},
{"Key":"Span.Start","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDE2NjE1MTQtMDY6MDA="},
{"Key":"Span.End","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDE3MDYxNjgtMDY6MDA="},
{"Key":"_schema:Timespan","Value":null}
],
"Sub":null},
{"ID":{"Trace":"60d20d005593de87","Span":"6b6d6916df809604","Parent":"79d146dac9a29a7e"},
"Annotations":[
{"Key":"Name","Value":"ZXhlY3V0b3IuQ29tcGlsZQ=="},
{"Key":"_schema:name","Value":null},
{"Key":"Span.End","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDE3NTcyODUtMDY6MDA="},
{"Key":"Span.Start","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDE3MzE0MjYtMDY6MDA="},
{"Key":"_schema:Timespan","Value":null}
],
"Sub":null},
{"ID":{"Trace":"60d20d005593de87","Span":"3f1bcdd402a72911","Parent":"79d146dac9a29a7e"},
"Annotations":[
{"Key":"Name","Value":"c2Vzc2lvbi5Db21taXRUeG4="},
{"Key":"_schema:name","Value":null},
{"Key":"Span.Start","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDE3OTgyNjItMDY6MDA="},
{"Key":"Span.End","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDE4MDU1NzYtMDY6MDA="},
{"Key":"_schema:Timespan","Value":null}
],
"Sub":null},
{"ID":{"Trace":"60d20d005593de87","Span":"58c1f7d66dc5afbc","Parent":"79d146dac9a29a7e"},
"Annotations":[
{"Key":"Name","Value":"c2Vzc2lvbi5ydW5TdG10"},
{"Key":"_schema:name","Value":null},
{"Key":"Msg","Value":"eyJzcWwiOiJTRUxFQ1QgKiBGUk9NIHQxIFdIRVJFIGlkID0gMiJ9"},
{"Key":"Time","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDE3ODA1NjgtMDY6MDA="},
{"Key":"_schema:log","Value":null},
{"Key":"Span.End","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDE4MTk5MzMtMDY6MDA="},
{"Key":"Span.Start","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDE3NzcyNDItMDY6MDA="},
{"Key":"_schema:Timespan","Value":null}
],
"Sub":null},
{"ID":{"Trace":"60d20d005593de87","Span":"6bd8cc440fb31ed7","Parent":"79d146dac9a29a7e"},
"Annotations":[
{"Key":"Name","Value":"c2Vzc2lvbi5FeGVjdXRl"},
{"Key":"_schema:name","Value":null},
{"Key":"Span.Start","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDE2MTEwODktMDY6MDA="},
{"Key":"Span.End","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDE4NTU0My0wNjowMA=="},
{"Key":"_schema:Timespan","Value":null}
],
"Sub":null},
{"ID":{"Trace":"60d20d005593de87","Span":"61d0b809f6cc018b","Parent":"79d146dac9a29a7e"},
"Annotations":[
{"Key":"Name","Value":"cmVjb3JkU2V0Lk5leHQ="},
{"Key":"_schema:name","Value":null},
{"Key":"Span.Start","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDE4NzQ1NTYtMDY6MDA="},
{"Key":"Span.End","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDIyOTg4NjYtMDY6MDA="},
{"Key":"_schema:Timespan","Value":null}
],
"Sub":null},
{"ID":{"Trace":"60d20d005593de87","Span":"2bd2c3d47ccb1133","Parent":"79d146dac9a29a7e"},
"Annotations":[
{"Key":"Name","Value":"cmVjb3JkU2V0Lk5leHQ="},
{"Key":"_schema:name","Value":null},
{"Key":"Span.Start","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDIzMjY0ODgtMDY6MDA="},
{"Key":"Span.End","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDIzMjkwMDMtMDY6MDA="},
{"Key":"_schema:Timespan","Value":null}
],
"Sub":null}
]
}
]
1 row in set (0.00 sec)
trace format='json' select * from mysql.user;
```

The JSON formatted trace can be pasted into the trace viewer, which is accessed via the TiDB status port:
Expand Down
4 changes: 4 additions & 0 deletions sql-statements/sql-statement-update.md
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Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,10 @@ The `UPDATE` statement is used to modify data in a specified table.

![UpdateStmt](/media/sqlgram/UpdateStmt.png)

**PriorityOpt:**

![PriorityOpt](/media/sqlgram/PriorityOpt.png)

**TableRef:**

![TableRef](/media/sqlgram/TableRef.png)
Expand Down
46 changes: 25 additions & 21 deletions sql-statements/sql-statement-use.md
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Original file line number Diff line number Diff line change
Expand Up @@ -28,27 +28,31 @@ You can turn off this feature to get a quicker startup with -A

Database changed
mysql> SHOW TABLES;
+----------------------+
| Tables_in_mysql |
+----------------------+
| GLOBAL_VARIABLES |
| bind_info |
| columns_priv |
| db |
| default_roles |
| gc_delete_range |
| gc_delete_range_done |
| help_topic |
| role_edges |
| stats_buckets |
| stats_feedback |
| stats_histograms |
| stats_meta |
| tables_priv |
| tidb |
| user |
+----------------------+
16 rows in set (0.00 sec)
+-------------------------+
| Tables_in_mysql |
+-------------------------+
| GLOBAL_VARIABLES |
| bind_info |
| columns_priv |
| db |
| default_roles |
| expr_pushdown_blacklist |
| gc_delete_range |
| gc_delete_range_done |
| global_priv |
| help_topic |
| opt_rule_blacklist |
| role_edges |
| stats_buckets |
| stats_feedback |
| stats_histograms |
| stats_meta |
| stats_top_n |
| tables_priv |
| tidb |
| user |
+-------------------------+
20 rows in set (0.01 sec)

mysql> CREATE DATABASE newtest;
Query OK, 0 rows affected (0.10 sec)
Expand Down