anchor.diff:  }
   
   
  +createTableOptions:
  +	createTableBasic
  +	|createTableSelect
  +	|createTableLike
  +	;
  +	
  +createTableBasic:
  +	
  +	;
  +	
  +createDefinition:
  +	columnNameAndDefinition
  +  	(constraintDefinition|indexDefinition)
  +  	;	
  +	
  +createTableSelect:
  +	;
  +	
  +createTableLike:
  +	;	
  +
   alterSpecifications:
   	alterSpecification (COMMA alterSpecification)*
   	;
  
positive.code: alterSpecification:
    	tableOptions
    	| ADD COLUMN? (singleColumn | multiColumn)
  	| (ADD (INDEX|KEY) indexName? indexType? keyParts indexOption?)+
  	| (ADD (CONSTRAINT symbol?)? (primaryKeyOption | uniqueOption | foreignKeyOption))+
  	| (ADD FULLTEXT (INDEX|KEY)? indexName? indexType? keyParts indexOption?)+
  	| (ADD SPATIAL (INDEX|KEY)? indexName? indexType? keyParts indexOption?)+
  	| ALGORITHM EQ_OR_ASSIGN? (DEFAULT|INPLACE|COPY)
  	| ALTER COLUMN? columnName (SET DEFAULT | DROP DEFAULT)
  	| CHANGE COLUMN? columnName columnName columnDefinition (FIRST|AFTER columnName)?
  
negative.code: indexType:
      USING (BTREE | HASH)
  	;
  	
  indexOption:
      KEY_BLOCK_SIZE EQ_OR_ASSIGN? value
    | indexType
  