CreateQuery test (children 3)
 Identifier test
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration json (children 1)
    DataType JSON (children 1)
     ExpressionList (children 1)
      ASTObjectTypeArgument (children 1)
       NameTypePair e (children 1)
        DataType Enum (children 1)
         ExpressionList (children 2)
          Function equals (children 1)
           ExpressionList (children 2)
            Literal \'a\'
            Literal UInt64_1
          Function equals (children 1)
           ExpressionList (children 2)
            Literal \'b\'
            Literal UInt64_2
 Storage definition (children 2)
  Function MergeTree
  Function tuple (children 1)
   ExpressionList
