cherry pick pingcap#5069 to release-4.0 (pingcap#5074)

Signed-off-by: ti-srebot <ti-srebot@pingcap.com> Co-authored-by: TomShawn <41534398+TomShawn@users.noreply.github.com>
ti-srebot · Dec 10, 2020 · 9bca06b · 9bca06b
1 parent c583725
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diff --git a/media/sqlgram/BRIETables.png b/media/sqlgram/BRIETables.png
diff --git a/media/sqlgram/BackupOption.png b/media/sqlgram/BackupOption.png
diff --git a/media/sqlgram/BackupStmt.png b/media/sqlgram/BackupStmt.png
diff --git a/media/sqlgram/BackupTSO.png b/media/sqlgram/BackupTSO.png
diff --git a/media/sqlgram/Boolean.png b/media/sqlgram/Boolean.png
diff --git a/media/sqlgram/RestoreOption.png b/media/sqlgram/RestoreOption.png
diff --git a/media/sqlgram/RestoreStmt.png b/media/sqlgram/RestoreStmt.png
diff --git a/media/sqlgram/ShowBRIEStmt.png b/media/sqlgram/ShowBRIEStmt.png
diff --git a/sql-statements/sql-statement-backup.md b/sql-statements/sql-statement-backup.md
@@ -18,25 +18,28 @@ aliases: ['/docs-cn/stable/sql-statements/sql-statement-backup/','/docs-cn/v4.0/
 
 ## 语法图
 
-**BackupStmt:**
-
-![BackupStmt](/media/sqlgram/BackupStmt.png)
-
-**BRIETables:**
-
-![BRIETables](/media/sqlgram/BRIETables.png)
-
-**BackupOption:**
-
-![BackupOption](/media/sqlgram/BackupOption.png)
-
-**Boolean:**
-
-![Boolean](/media/sqlgram/Boolean.png)
-
-**BackupTSO:**
-
-![BackupTSO](/media/sqlgram/BackupTSO.png)
+```ebnf+diagram
+BackupStmt ::=
+    "BACKUP" BRIETables "TO" stringLit BackupOption*
+
+BRIETables ::=
+    "DATABASE" ( '*' | DBName (',' DBName)* )
+|   "TABLE" TableNameList
+
+BackupOption ::=
+    "RATE_LIMIT" '='? LengthNum "MB" '/' "SECOND"
+|   "CONCURRENCY" '='? LengthNum
+|   "CHECKSUM" '='? Boolean
+|   "SEND_CREDENTIALS_TO_TIKV" '='? Boolean
+|   "LAST_BACKUP" '='? BackupTSO
+|   "SNAPSHOT" '='? ( BackupTSO | LengthNum TimestampUnit "AGO" )
+
+Boolean ::=
+    NUM | "TRUE" | "FALSE"
+
+BackupTSO ::=
+    LengthNum | stringLit
+```
 
 ## 示例
 

diff --git a/sql-statements/sql-statement-restore.md b/sql-statements/sql-statement-restore.md
@@ -26,21 +26,23 @@ aliases: ['/docs-cn/stable/sql-statements/sql-statement-restore/','/docs-cn/v4.0
 
 ## 语法图
 
-**RestoreStmt:**
-
-![RestoreStmt](/media/sqlgram/RestoreStmt.png)
-
-**BRIETables:**
-
-![BRIETables](/media/sqlgram/BRIETables.png)
-
-**RestoreOption:**
-
-![RestoreOption](/media/sqlgram/RestoreOption.png)
-
-**Boolean:**
-
-![Boolean](/media/sqlgram/Boolean.png)
+```ebnf+diagram
+RestoreStmt ::=
+    "RESTORE" BRIETables "FROM" stringLit RestoreOption*
+
+BRIETables ::=
+    "DATABASE" ( '*' | DBName (',' DBName)* )
+|   "TABLE" TableNameList
+
+RestoreOption ::=
+    "RATE_LIMIT" '='? LengthNum "MB" '/' "SECOND"
+|   "CONCURRENCY" '='? LengthNum
+|   "CHECKSUM" '='? Boolean
+|   "SEND_CREDENTIALS_TO_TIKV" '='? Boolean
+
+Boolean ::=
+    NUM | "TRUE" | "FALSE"
+```
 
 ## 示例
 

diff --git a/sql-statements/sql-statement-show-backups.md b/sql-statements/sql-statement-show-backups.md
@@ -12,13 +12,14 @@ aliases: ['/docs-cn/stable/sql-statements/sql-statement-show-backups/','/docs-cn
 
 ## 语法图
 
-**ShowBRIEStmt:**
+```ebnf+diagram
+ShowBRIEStmt ::=
+    "SHOW" ("BACKUPS" | "RESTORES") ShowLikeOrWhere?
 
-![ShowBRIEStmt](/media/sqlgram/ShowBRIEStmt.png)
-
-**ShowLikeOrWhereOpt:**
-
-![ShowLikeOrWhereOpt](/media/sqlgram/ShowLikeOrWhereOpt.png)
+ShowLikeOrWhere ::=
+    "LIKE" SimpleExpr
+|   "WHERE" Expression
+```
 
 ## 示例