CreateQuery prewhere (children 3)
 Identifier prewhere
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration light (children 1)
    DataType UInt8
   ColumnDeclaration heavy (children 1)
    DataType String
 Storage definition (children 2)
  Function MergeTree
  Function tuple (children 1)
   ExpressionList