| # topn_bytes_limit is set to 6 so a limit of 1 will return a single int |
| # a single int is 4 bytes, which is under the limit of 6 so a TOP-N should be triggered |
| select int_col from functional.alltypes order by 1 limit 1 |
| ---- PLAN |
| PLAN-ROOT SINK |
| | |
| 01:TOP-N [LIMIT=1] |
| | order by: int_col ASC |
| | row-size=4B cardinality=1 |
| | |
| 00:SCAN HDFS [functional.alltypes] |
| partitions=24/24 files=24 size=478.45KB |
| row-size=4B cardinality=7.30K |
| ---- DISTRIBUTEDPLAN |
| PLAN-ROOT SINK |
| | |
| 02:MERGING-EXCHANGE [UNPARTITIONED] |
| | order by: int_col ASC |
| | limit: 1 |
| | |
| 01:TOP-N [LIMIT=1] |
| | order by: int_col ASC |
| | row-size=4B cardinality=1 |
| | |
| 00:SCAN HDFS [functional.alltypes] |
| partitions=24/24 files=24 size=478.45KB |
| row-size=4B cardinality=7.30K |
| ==== |
| # returns 2 ints, with a total size of 8 bytes, which exceeds the limit of 6 and thus triggers a SORT |
| select int_col from functional.alltypes order by 1 limit 2 |
| ---- PLAN |
| PLAN-ROOT SINK |
| | |
| 01:SORT [LIMIT=2] |
| | order by: int_col ASC |
| | row-size=4B cardinality=2 |
| | |
| 00:SCAN HDFS [functional.alltypes] |
| partitions=24/24 files=24 size=478.45KB |
| row-size=4B cardinality=7.30K |
| ---- DISTRIBUTEDPLAN |
| PLAN-ROOT SINK |
| | |
| 02:MERGING-EXCHANGE [UNPARTITIONED] |
| | order by: int_col ASC |
| | limit: 2 |
| | |
| 01:SORT [LIMIT=2] |
| | order by: int_col ASC |
| | row-size=4B cardinality=2 |
| | |
| 00:SCAN HDFS [functional.alltypes] |
| partitions=24/24 files=24 size=478.45KB |
| row-size=4B cardinality=7.30K |
| ==== |
| # test that offset is taken into account; the query only returns a single row but needs to sort two rows |
| # sorting two ints requires 8 bytes of memory, which exceeds the threshold of 6 |
| select int_col from functional.alltypes order by 1 limit 1 offset 1 |
| ---- PLAN |
| PLAN-ROOT SINK |
| | |
| 01:SORT [LIMIT=1 OFFSET=1] |
| | order by: int_col ASC |
| | row-size=4B cardinality=1 |
| | |
| 00:SCAN HDFS [functional.alltypes] |
| partitions=24/24 files=24 size=478.45KB |
| row-size=4B cardinality=7.30K |
| ---- DISTRIBUTEDPLAN |
| PLAN-ROOT SINK |
| | |
| 02:MERGING-EXCHANGE [UNPARTITIONED] |
| | offset: 1 |
| | order by: int_col ASC |
| | limit: 1 |
| | |
| 01:SORT [LIMIT=2] |
| | order by: int_col ASC |
| | row-size=4B cardinality=2 |
| | |
| 00:SCAN HDFS [functional.alltypes] |
| partitions=24/24 files=24 size=478.45KB |
| row-size=4B cardinality=7.30K |
| ==== |
