[ https://issues.apache.org/jira/browse/FLINK-21573?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ASF GitHub Bot updated FLINK-21573: ----------------------------------- Labels: auto-deprioritized-major auto-deprioritized-minor pull-request-available (was: auto-deprioritized-major auto-deprioritized-minor) > Support expression reuse in codegen > ----------------------------------- > > Key: FLINK-21573 > URL: https://issues.apache.org/jira/browse/FLINK-21573 > Project: Flink > Issue Type: Improvement > Components: Table SQL / Runtime > Reporter: Benchao Li > Priority: Not a Priority > Labels: auto-deprioritized-major, auto-deprioritized-minor, > pull-request-available > > Currently there is no expression reuse in codegen, and this may result in > more CPU overhead in some cases. E.g. > {code:java} > SELECT my_map['key1'] as key1, my_map['key2'] as key2, my_map['key3'] as key3 > FROM ( > SELECT dump_json_to_map(col1) as my_map > FROM T > ) > {code} > `dump_json_to_map` will be called 3 times. -- This message was sent by Atlassian Jira (v8.20.10#820010)