CreateQuery t1 (children 3)
 Identifier t1
 Columns definition (children 2)
  ExpressionList (children 2)
   ColumnDeclaration vkey (children 1)
    DataType UInt32
   ColumnDeclaration c8 (children 1)
    DataType String
  Identifier vkey
 Storage definition (children 1)
  Function MergeTree
