About select * from .... :Kylin 1792
<https://issues.apache.org/jira/browse/KYLIN-1792> v1.5.3
Can you check if you see this error: "*Scan row count exceeded threshold:
1000000, please add filter condition to narrow down backend scan range,
like where clause*"
With Queries like this:
SELECT * FROM TB
There are some limits:
- Read more 1M rows per RS
- Read more 100MB per RD
- Total result of Kylin 3.0 GB (more or less)
- Time limit to solve querie . (I don't remember if it was 10 seconds)
*As resume:* Kylin, can't read Billon of rows, and compute its. Because is
a OLAP Cube and we espect solve queries very very fast (This is the reason
of existence of a Precalculates Cubes)
You must add where condition to Select column from TB Where ... to make a
predicate pushdown on queries
2016-12-02 3:23 GMT+01:00 alaleiwang <[email protected]>:
> KYLIN-1787 say fixed in v1.5.3,but it still happened from v1.5.1 to v1.5.3
>
> --
> View this message in context: http://apache-kylin.74782.x6.
> nabble.com/select-clause-still-cause-all-regionserver-
> crash-tp6474p6476.html
> Sent from the Apache Kylin mailing list archive at Nabble.com.
>
