CreateQuery unsorted_collapsing (children 3)
 Identifier unsorted_collapsing
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration x (children 1)
    DataType UInt32
   ColumnDeclaration s (children 1)
    DataType String
   ColumnDeclaration sign (children 1)
    DataType Int8
 Storage definition (children 2)
  Function CollapsingMergeTree (children 1)
   ExpressionList (children 1)
    Identifier sign
  Function tuple (children 1)
   ExpressionList
