CreateQuery t_in_tuple_index (children 3)
 Identifier t_in_tuple_index
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration ID (children 1)
    DataType String
   ColumnDeclaration USER_ID (children 1)
    DataType String
   ColumnDeclaration PLATFORM (children 1)
    DataType LowCardinality (children 1)
     ExpressionList (children 1)
      DataType String
 Storage definition (children 3)
  Function MergeTree (children 1)
   ExpressionList
  Function tuple (children 1)
   ExpressionList (children 3)
    Identifier PLATFORM
    Identifier USER_ID
    Identifier ID
  Set