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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PHOENIX-3176) Rows will be skipped which are having future timestamp in row_timestamp column
Date Fri, 09 Sep 2016 04:18:20 GMT

    [ https://issues.apache.org/jira/browse/PHOENIX-3176?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15475861#comment-15475861
] 

Lars Hofhansl commented on PHOENIX-3176:
----------------------------------------

bq.  This would be a pretty fundamental change, so we need to be careful with it.

Let's not do that for 4.8.x then.

> Rows will be skipped which are having future timestamp in row_timestamp column
> ------------------------------------------------------------------------------
>
>                 Key: PHOENIX-3176
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-3176
>             Project: Phoenix
>          Issue Type: Bug
>    Affects Versions: 4.6.0
>            Reporter: Ankit Singhal
>             Fix For: 4.8.1
>
>         Attachments: PHOENIX-3176.patch
>
>
> Rows will be skipped when row_timestamp have future timestamp
> {code}
> : jdbc:phoenix:localhost> CREATE TABLE historian.data (
> . . . . . . . . . . . . .> assetid unsigned_int not null,
> . . . . . . . . . . . . .> metricid unsigned_int not null,
> . . . . . . . . . . . . .> ts timestamp not null,
> . . . . . . . . . . . . .> val double
> . . . . . . . . . . . . .> CONSTRAINT pk PRIMARY KEY (assetid, metricid, ts row_timestamp))
> . . . . . . . . . . . . .> IMMUTABLE_ROWS=true;
> No rows affected (1.283 seconds)
> 0: jdbc:phoenix:localhost> upsert into historian.data values(1,2,'2015-01-01',1.2);
> 1 row affected (0.047 seconds)
> 0: jdbc:phoenix:localhost> upsert into historian.data values(1,2,'2018-01-01',1.2);
> 1 row affected (0.005 seconds)
> 0: jdbc:phoenix:localhost> select * from historian.data;
> +----------+-----------+--------------------------+------+
> | ASSETID  | METRICID  |            TS            | VAL  |
> +----------+-----------+--------------------------+------+
> | 1        | 2         | 2015-01-01 00:00:00.000  | 1.2  |
> +----------+-----------+--------------------------+------+
> 1 row selected (0.04 seconds)
> 0: jdbc:phoenix:localhost> select count(*) from historian.data;
> +-----------+
> | COUNT(1)  |
> +-----------+
> | 1         |
> +-----------+
> 1 row selected (0.013 seconds)
> {code}
> Explain plan, where scan range is capped to compile time.
> {code}
> | CLIENT 1-CHUNK PARALLEL 1-WAY FULL SCAN OVER HISTORIAN.DATA  |
> |     ROW TIMESTAMP FILTER [0, 1470901929982)                  |
> |     SERVER FILTER BY FIRST KEY ONLY                          |
> |     SERVER AGGREGATE INTO SINGLE ROW                         |
> {code}



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