CreateQuery test (children 3)
 Identifier test
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration d (children 1)
    DataType DateTime
   ColumnDeclaration a (children 1)
    DataType String
   ColumnDeclaration b (children 1)
    DataType UInt64
 Storage definition (children 3)
  Function MergeTree
  Function toDate (children 1)
   ExpressionList (children 1)
    Identifier d
  Identifier d
