CreateQuery test (children 3)
 Identifier test
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration val (children 1)
    DataType LowCardinality (children 1)
     ExpressionList (children 1)
      DataType Float32
 Storage definition (children 2)
  Function MergeTree
  Identifier val
