ClickHouse/tests/queries/0_stateless/02835_join_step_explain.reference

Expression ((Project names + (Projection + DROP unused columns after JOIN)))
Header: id UInt64
        value_1 String
        rhs.id UInt64
        rhs.value_1 String
Actions: INPUT : 0 -> __table1.id UInt64 : 0
         INPUT : 1 -> __table1.value_1 String : 1
         INPUT : 2 -> __table2.value_1 String : 2
         INPUT : 3 -> __table2.id UInt64 : 3
         ALIAS __table1.id :: 0 -> id UInt64 : 4
         ALIAS __table1.value_1 :: 1 -> value_1 String : 0
         ALIAS __table2.value_1 :: 2 -> rhs.value_1 String : 1
         ALIAS __table2.id :: 3 -> rhs.id UInt64 : 2
Positions: 4 0 2 1
  Join (JOIN FillRightFirst)
  Header: __table1.id UInt64
          __table1.value_1 String
          __table2.value_1 String
          __table2.id UInt64
  Type: INNER
  Strictness: ALL
  Algorithm: HashJoin
  Clauses: [(__table1.id) = (__table2.id)]
    Expression ((JOIN actions + Change column names to column identifiers))
    Header: __table1.id UInt64
            __table1.value_1 String
    Actions: INPUT : 0 -> id UInt64 : 0
             INPUT : 1 -> value_1 String : 1
             ALIAS id :: 0 -> __table1.id UInt64 : 2
             ALIAS value_1 :: 1 -> __table1.value_1 String : 0
    Positions: 2 0
      ReadFromMergeTree (default.test_table_1)
      Header: id UInt64
              value_1 String
      ReadType: Default
      Parts: 1
      Granules: 1
    Expression ((JOIN actions + Change column names to column identifiers))
    Header: __table2.id UInt64
            __table2.value_1 String
    Actions: INPUT : 0 -> id UInt64 : 0
             INPUT : 1 -> value_1 String : 1
             ALIAS id :: 0 -> __table2.id UInt64 : 2
             ALIAS value_1 :: 1 -> __table2.value_1 String : 0
    Positions: 2 0
      ReadFromMergeTree (default.test_table_2)
      Header: id UInt64
              value_1 String
      ReadType: Default
      Parts: 1
      Granules: 1
--
Expression ((Project names + (Projection + DROP unused columns after JOIN)))
Header: id UInt64
        value_1 String
        rhs.id UInt64
        rhs.value_1 String
Actions: INPUT : 0 -> __table1.id UInt64 : 0
         INPUT : 1 -> __table1.value_1 String : 1
         INPUT :: 2 -> __table1.value_2 UInt64 : 2
         INPUT : 3 -> __table2.value_1 String : 3
         INPUT :: 4 -> __table2.value_2 UInt64 : 4
         INPUT : 5 -> __table2.id UInt64 : 5
         ALIAS __table1.id :: 0 -> id UInt64 : 6
         ALIAS __table1.value_1 :: 1 -> value_1 String : 0
         ALIAS __table2.value_1 :: 3 -> rhs.value_1 String : 1
         ALIAS __table2.id :: 5 -> rhs.id UInt64 : 3
Positions: 6 0 3 1
  Join (JOIN FillRightFirst)
  Header: __table1.id UInt64
          __table1.value_1 String
          __table1.value_2 UInt64
          __table2.value_1 String
          __table2.value_2 UInt64
          __table2.id UInt64
  Type: INNER
  Strictness: ASOF
  Algorithm: HashJoin
  ASOF inequality: LESS
  Clauses: [(__table1.id, __table1.value_2) = (__table2.id, __table2.value_2)]
    Expression ((JOIN actions + Change column names to column identifiers))
    Header: __table1.id UInt64
            __table1.value_1 String
            __table1.value_2 UInt64
    Actions: INPUT : 0 -> id UInt64 : 0
             INPUT : 1 -> value_1 String : 1
             INPUT : 2 -> value_2 UInt64 : 2
             ALIAS id :: 0 -> __table1.id UInt64 : 3
             ALIAS value_1 :: 1 -> __table1.value_1 String : 0
             ALIAS value_2 :: 2 -> __table1.value_2 UInt64 : 1
    Positions: 3 0 1
      ReadFromMergeTree (default.test_table_1)
      Header: id UInt64
              value_1 String
              value_2 UInt64
      ReadType: Default
      Parts: 1
      Granules: 1
    Expression ((JOIN actions + Change column names to column identifiers))
    Header: __table2.id UInt64
            __table2.value_1 String
            __table2.value_2 UInt64
    Actions: INPUT : 0 -> id UInt64 : 0
             INPUT : 1 -> value_1 String : 1
             INPUT : 2 -> value_2 UInt64 : 2
             ALIAS id :: 0 -> __table2.id UInt64 : 3
             ALIAS value_1 :: 1 -> __table2.value_1 String : 0
             ALIAS value_2 :: 2 -> __table2.value_2 UInt64 : 1
    Positions: 3 0 1
      ReadFromMergeTree (default.test_table_2)
      Header: id UInt64
              value_1 String
              value_2 UInt64
      ReadType: Default
      Parts: 1
      Granules: 1