[ https://issues.apache.org/jira/browse/IOTDB-181?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jialin Qiao closed IOTDB-181. ----------------------------- Resolution: Later > Remove "first_value" and "last_value" in TsDigest > ------------------------------------------------- > > Key: IOTDB-181 > URL: https://issues.apache.org/jira/browse/IOTDB-181 > Project: Apache IoTDB > Issue Type: Improvement > Reporter: Jialin Qiao > Priority: Minor > > In TsDigest, we have five statistics: min_value, max_value, sum_value, > first_value, last_value. > When filtering page or chunk, we use min_value and max_value for a filter > like "s1>10" or "s1<20". > The sum value can be used in aggregation query "select sum(s1) from root...". > However, it is difficult for me to come up with a scenario that uses > "first_value" and "last_value" to filter data, and they are never used at > all... > So why not remove them? -- This message was sent by Atlassian Jira (v8.3.4#803005)