anchor.diff:  subpartitionDefinition_
       : SUBPARTITION identifier_ partitionDefinitionOption_*
       ;
  -
  -dropTable
  -    : DROP TEMPORARY? TABLE (IF EXISTS)? tableName (COMMA_ tableName)*
  -    ;
  -
  -truncateTable
  -    : TRUNCATE TABLE? tableName
  -    ;
  -
  -createIndex
  -    : CREATE (UNIQUE | FULLTEXT | SPATIAL)? INDEX indexName indexType_? ON tableName
  -    ;
  -
  -dropIndex
  -    : DROP INDEX (ONLINE | OFFLINE)? indexName ON tableName
  -    ;
  
positive.code:     : CREATE TEMPORARY? TABLE (IF NOT EXISTS)? tableName (LP_ createDefinitions_ RP_ | createLike_)
      ;
  
  createDefinitions_
      : createDefinition_ (COMMA_ createDefinition_)*
      ;
  
negative.code: 
  checkConstraintDefinition_
      : (CONSTRAINT ignoredIdentifier_?)? CHECK expr (NOT? ENFORCED)?
      ;
  
  alterSpecifications_
  