#5452, carry PR#5753 to dev-4.x (#5754)

shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/antlr4/imports/mysql/BaseRule.g4

@@ -397,7 +397,8 @@ positionFunction
     ;
 
 substringFunction
-    :  (SUBSTRING | SUBSTR) LP_ expr FROM NUMBER_ (FOR NUMBER_)? RP_
+    : (SUBSTRING | SUBSTR) LP_ expr FROM NUMBER_ (FOR NUMBER_)? RP_
+    | (SUBSTRING | SUBSTR) LP_ expr COMMA_ NUMBER_ (COMMA_ NUMBER_)? RP_
     ;
 
 extractFunction
@@ -494,14 +495,14 @@ orderByItem
     ;
 
 dataType
-    : dataTypeName dataTypeLength? characterSet_? collateClause_? (UNSIGNED | SIGNED)? ZEROFILL? | dataTypeName collectionOptions characterSet_? collateClause_?
+    : dataTypeName dataTypeLength? characterSet_? collateClause_? ZEROFILL? | dataTypeName collectionOptions characterSet_? collateClause_?
     ;
 
 dataTypeName
-    : INTEGER | INT | SMALLINT | TINYINT | MEDIUMINT | BIGINT | DECIMAL| NUMERIC | FLOAT | DOUBLE | BIT | BOOL | BOOLEAN
+    : (UNSIGNED | SIGNED)? INTEGER | INT | SMALLINT | TINYINT | MEDIUMINT | BIGINT | DECIMAL| NUMERIC | FLOAT | DOUBLE | BIT | BOOL | BOOLEAN
     | DEC | DATE | DATETIME | TIMESTAMP | TIME | YEAR | CHAR | VARCHAR | BINARY | VARBINARY | TINYBLOB | TINYTEXT | BLOB
     | TEXT | MEDIUMBLOB | MEDIUMTEXT | LONGBLOB | LONGTEXT | ENUM | SET | GEOMETRY | POINT | LINESTRING | POLYGON
-    | MULTIPOINT | MULTILINESTRING | MULTIPOLYGON | GEOMETRYCOLLECTION | JSON
+    | MULTIPOINT | MULTILINESTRING | MULTIPOLYGON | GEOMETRYCOLLECTION | JSON | UNSIGNED | SIGNED
     ;
 
 dataTypeLength