CreateQuery samples (children 3)
 Identifier samples
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration key (children 1)
    DataType UInt32
   ColumnDeclaration value (children 1)
    DataType UInt32
 Storage definition (children 3)
  Function MergeTree (children 1)
   ExpressionList
  Identifier key
  Identifier key
