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Danny Chen commented on CALCITE-3272: ------------------------------------- I'm preparing to merge the PR soon if there are no more comments in 24 hours :) > TUMBLE Table-valued Function > ---------------------------- > > Key: CALCITE-3272 > URL: https://issues.apache.org/jira/browse/CALCITE-3272 > Project: Calcite > Issue Type: Sub-task > Reporter: Rui Wang > Assignee: Rui Wang > Priority: Major > Labels: pull-request-available > Fix For: 1.22.0 > > Time Spent: 17h > Remaining Estimate: 0h > > Define a builtin TVF: Tumble (data , timecol , dur, [ offset ]) > The return value of Tumble is a relation that includes all columns of data as > well as additional event time columns window_start and window_end. > Examples of TUMBLE TVF are (from https://s.apache.org/streaming-beam-sql ): > 8:21> SELECT * FROM Bid; > -------------------------- > | bidtime | price | item | > -------------------------- > | 8:07 | $2 | A | > | 8:11 | $3 | B | > | 8:05 | $4 | C | > | 8:09 | $5 | D | > | 8:13 | $1 | E | > | 8:17 | $6 | F | > -------------------------- > 8:21> SELECT * > FROM TABLE Tumble ( > data => TABLE Bid , > timecol => DESCRIPTOR ( bidtime ) , > dur => INTERVAL '10' MINUTES , > offset => INTERVAL '0' MINUTES ); > ------------------------------------------ > | window_start | window_end | bidtime | price | item | > ------------------------------------------ > | 8:00 | 8:10 | 8:07 | $2 | A | > | 8:10 | 8:20 | 8:11 | $3 | B | > | 8:00 | 8:10 | 8:05 | $4 | C | > | 8:00 | 8:10 | 8:09 | $5 | D | > | 8:10 | 8:20 | 8:13 | $1 | E | > | 8:10 | 8:20 | 8:17 | $6 | F | > ------------------------------------------ > 8:21> SELECT MAX ( window_start ) , window_end , SUM ( price ) > FROM TABLE Tumble ( > data => TABLE ( Bid ) , > timecol => DESCRIPTOR ( bidtime ) , > dur => INTERVAL '10 ' MINUTES ) > GROUP BY wend; > ------------------------- > | window_start | window_end | price | > ------------------------- > | 8:00 | 8:10 | $11 | > | 8:10 | 8:20 | $10 | > ------------------------- -- This message was sent by Atlassian Jira (v8.3.4#803005)