CreateQuery row_level_policy_prewhere (children 3)
 Identifier row_level_policy_prewhere
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration x (children 1)
    DataType Int16
   ColumnDeclaration y (children 1)
    DataType String
 Storage definition (children 2)
  Function MergeTree
  Identifier x
