yiqijiu commented on PR #5556:
URL: https://github.com/apache/hive/pull/5556#issuecomment-2509630350
@okumin @ngsg
Hello, I finally managed to mock the issue. For example, with this statement
`create table explain_multiple_ptf_big_table
(
key1 string,
value_str1 string,
key3 string
);
create table explain_multiple_ptf_big_table2
(
key21 string,
value_str21 string,
key23 string
);
alter table explain_multiple_ptf_big_table
update statistics set('numRows' = '9223372036854775',
'rawDataSize' = '9223372036854775807');
alter table explain_multiple_ptf_big_table2
update statistics set('numRows' = '9223372036854775',
'rawDataSize' = '9223372036854775807');
explain
select *,row_number() over (partition by key order by key2 desc) rn,
row_number() over (partition by key2 order by key desc) rn2,
max(value_str) over (partition by key2 order by key desc) max1,
max(value_str) over (partition by key order by key2 desc) max3,
min(value_str) over (partition by key2 order by key desc) min1,
min(value_str) over (partition by key order by key2 desc) min3,
last_value(value_str) over (partition by key) lv,
first_value(value_str) over (partition by key2) fv,
max(value_str) over (partition by key) fv21
from (select key1 key, value_str1 value_str, key3 key2 from
explain_multiple_ptf_big_table
union all select key21 key, value_str21 value_str, key23 key2 from
explain_multiple_ptf_big_table2) a1
;`
it produces the following result.
`+----------------------------------------------------+
| Explain |
+----------------------------------------------------+
| Plan optimized by CBO. |
| |
| Vertex dependency in root stage |
| Map 1 <- Union 2 (CONTAINS) |
| Map 8 <- Union 2 (CONTAINS) |
| Reducer 3 <- Union 2 (SIMPLE_EDGE) |
| Reducer 4 <- Reducer 3 (SIMPLE_EDGE) |
| Reducer 5 <- Reducer 4 (SIMPLE_EDGE) |
| Reducer 6 <- Reducer 5 (SIMPLE_EDGE) |
| Reducer 7 <- Reducer 6 (SIMPLE_EDGE) |
| |
| Stage-0 |
| Fetch Operator |
| limit:-1 |
| Stage-1 |
| Reducer 7 |
| File Output Operator [FS_26] |
| Select Operator [SEL_24] (rows=18446744073709550 width=-475) |
|
Output:["_col0","_col1","_col2","_col3","_col4","_col5","_col6","_col7","_col8","_col9","_col10","_col11"]
|
| PTF Operator [PTF_23] (rows=18446744073709550 width=-475) |
| Function
definitions:[{},{"name:":"windowingtablefunction","order by:":"_col8 ASC NULLS
FIRST","partition by:":"_col8"}] |
| Select Operator [SEL_22] (rows=18446744073709550 width=-475) |
|
Output:["_col0","_col1","_col2","_col3","_col4","_col5","_col6","_col7","_col8","_col9","_col10"]
|
| <-Reducer 6 [SIMPLE_EDGE] |
| SHUFFLE [RS_21] |
| PartitionCols:_col7 |
| Select Operator [SEL_20] (rows=18446744073709550
width=-475) |
|
Output:["first_value_window_7","_col0","_col1","_col2","_col3","_col4","_col5","_col6","_col7","_col8","_col9"]
|
| PTF Operator [PTF_19] (rows=18446744073709550
width=-475) |
| Function
definitions:[{},{"name:":"windowingtablefunction","order by:":"_col9 ASC NULLS
FIRST","partition by:":"_col9"}] |
| Select Operator [SEL_18] (rows=18446744073709550
width=-475) |
|
Output:["_col0","_col1","_col2","_col3","_col4","_col5","_col6","_col7","_col8","_col9"]
|
| <-Reducer 5 [SIMPLE_EDGE] |
| SHUFFLE [RS_17] |
| PartitionCols:_col8 |
| Select Operator [SEL_16] (rows=18446744073709550
width=-475) |
|
Output:["first_value_window_6","_col0","_col1","_col2","_col3","_col4","_col5","_col6","_col7","_col8"]
|
| PTF Operator [PTF_15] (rows=18446744073709550
width=-475) |
| Function
definitions:[{},{"name:":"windowingtablefunction","order by:":"_col6 DESC NULLS
LAST","partition by:":"_col6"}] |
| Select Operator [SEL_14]
(rows=18446744073709550 width=-475) |
|
Output:["_col0","_col1","_col2","_col3","_col4","_col5","_col6","_col7","_col8"]
|
| <-Reducer 4 [SIMPLE_EDGE] |
| SHUFFLE [RS_13] |
| PartitionCols:_col3 |
| Select Operator [SEL_12]
(rows=18446744073709550 width=-475) |
|
Output:["row_number_window_1","max_window_2","min_window_4","_col0","_col1","_col2","_col3","_col4","_col5"]
|
| PTF Operator [PTF_11]
(rows=18446744073709550 width=-475) |
| Function
definitions:[{},{"name:":"windowingtablefunction","order by:":"_col3 DESC NULLS
FIRST","partition by:":"_col5"}] |
| Select Operator [SEL_10]
(rows=18446744073709550 width=-475) |
|
Output:["_col0","_col1","_col2","_col3","_col4","_col5"] |
| <-Reducer 3 [SIMPLE_EDGE] |
| SHUFFLE [RS_9] |
| PartitionCols:_col2 |
| Select Operator [SEL_8]
(rows=18446744073709550 width=-475) |
|
Output:["row_number_window_0","max_window_3","min_window_5","_col0","_col1","_col2"]
|
| PTF Operator [PTF_7]
(rows=18446744073709550 width=-475) |
| Function
definitions:[{},{"name:":"windowingtablefunction","order by:":"_col2 DESC NULLS
FIRST","partition by:":"_col0"}] |
| Select Operator [SEL_6]
(rows=18446744073709550 width=-475) |
|
Output:["_col0","_col1","_col2"] |
| <-Union 2 [SIMPLE_EDGE] |
| <-Map 1 [CONTAINS]
vectorized |
| Reduce Output Operator
[RS_36] |
| PartitionCols:_col0 |
| Select Operator [SEL_35]
(rows=9223372036854775 width=524) |
|
Output:["_col0","_col1","_col2"] |
| TableScan [TS_27]
(rows=9223372036854775 width=524) |
|
default@explain_multiple_ptf_big_table,explain_multiple_ptf_big_table,Tbl:COMPLETE,Col:NONE,Output:["key1","value_str1","key3"]
|
| <-Map 8 [CONTAINS]
vectorized |
| Reduce Output Operator
[RS_43] |
| PartitionCols:_col0 |
| Select Operator [SEL_42]
(rows=9223372036854775 width=524) |
|
Output:["_col0","_col1","_col2"] |
| TableScan [TS_31]
(rows=9223372036854775 width=524) |
|
default@explain_multiple_ptf_big_table2,explain_multiple_ptf_big_table2,Tbl:COMPLETE,Col:NONE,Output:["key21","value_str21","key23"]
|
| |
+----------------------------------------------------+`
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