anchor.diff:  arrayConstructor:
   	| ARRAY LEFT_BRACKET exprs RIGHT_BRACKET
   	| ARRAY LEFT_BRACKET arrayConstructor (COMMA arrayConstructor)* RIGHT_BRACKET
  -	;+	;
  
positive.code: 	;
  
  withStorageParameters:
  	WITH LEFT_PAREN storageParameters RIGHT_PAREN
  	;
  
  storageParameters:
  
negative.code: import PostgreKeyword, DataType, Keyword,BaseRule,Symbol;
  
  createIndex:
      CREATE UNIQUE? INDEX CONCURRENTLY? ((IF NOT EXISTS)? indexName)? ON tableName indexType?
      keyParts
      withStorageParameters?
      tableSpaceClause?
      whereClause?
      ;
  