anchor.diff:  an SQL identifier containing the name of a statement already prepared in this session. An SQL identifier is
   case-insensitive (will be in uppercase) unless it is double-quoted. It must be double-quoted if it contains blanks,
   lowercase letters, or special characters. It must start with a letter. When you refer to the prepared query in a
  -SELECT statement, you must use uppercase.
  -
  -Note: A few non-reserved words that can be used for prepared statement names cannot be used directly in EXPLAIN.
  -For example, 'EXPLAIN access;' results in a syntax error. You can still use the name, however, by using a
  -delimited identifier. That is, specify the name in upper case, surrounded by double-quotes. For example,
  -'EXPLAIN "ACCESS";' will work.
  -
  +SELECT statement, you must use uppercase.
  +
  +Note: A few non-reserved words that can be used for prepared statement names cannot be used directly in EXPLAIN.
  +For example, 'EXPLAIN access;' results in a syntax error. You can still use the name, however, by using a
  +delimited identifier. That is, specify the name in upper case, surrounded by double-quotes. For example,
  +'EXPLAIN "ACCESS";' will work.
  +
   * `_query-text_`
   +
   specifies the text of a query.
  
positive.code: ////
  
  <<<
  [[alter_table_statement]]
  == ALTER TABLE Statement
  
  
negative.code: == CREATE INDEX Statement
  
  The CREATE INDEX statement creates an SQL index based on one or more columns of a table or table-like object.
  
  CREATE INDEX is a Trafodion SQL extension.
  
  NOTE: DDL statements are not currently supported in transactions. That means that you cannot run this statement
  inside a user-defined transaction (BEGIN WORK&#8230;COMMIT WORK) or when AUTOCOMMIT is OFF. To run this statement,
  AUTOCOMMIT must be turned ON (the default) for the session.
  
  ```
  CREATE [VOLATILE | UNIQUE] INDEX index ON table
     (column-name [ASC[ENDING] | DESC[ENDING]]
     [,column-name [ASC[ENDING] | DESC[ENDING]]]...)
     [HBASE_OPTIONS (hbase-options-list)]
  