CreateQuery attach_partition_t2 (children 3)
 Identifier attach_partition_t2
 Columns definition (children 2)
  ExpressionList (children 2)
   ColumnDeclaration a (children 1)
    DataType UInt32
   ColumnDeclaration b (children 1)
    DataType String
  ExpressionList (children 1)
   Index (children 2)
    Identifier b
    Function bloom_filter (children 1)
     ExpressionList
 Storage definition (children 2)
  Function MergeTree
  Identifier a
