You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@calcite.apache.org by "Julian Hyde (Jira)" <ji...@apache.org> on 2021/06/28 23:05:00 UTC
[jira] [Comment Edited] (CALCITE-2322) Add fetch size support to
connection url and JDBC statement
[ https://issues.apache.org/jira/browse/CALCITE-2322?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17370933#comment-17370933 ]
Julian Hyde edited comment on CALCITE-2322 at 6/28/21, 11:04 PM:
-----------------------------------------------------------------
Properties are defined in [class CalciteConnectionProperty|https://github.com/apache/calcite/blob/4bc916619fd286b2c0cc4d5c653c96a68801d74e/core/src/main/java/org/apache/calcite/config/CalciteConnectionProperty.java#L39]. Follow the examples there. CALCITE-2995 is an example change that added a property.
Also update [JDBC adapter doc|https://calcite.apache.org/docs/adapter.html#jdbc-connect-string-parameters].
was (Author: julianhyde):
Properties are defined in [class CalciteConnectionProperty|https://github.com/apache/calcite/blob/4bc916619fd286b2c0cc4d5c653c96a68801d74e/core/src/main/java/org/apache/calcite/config/CalciteConnectionProperty.java#L39]. Follow the examples there. CALCITE-2995 is an example change that added a property.
> Add fetch size support to connection url and JDBC statement
> -----------------------------------------------------------
>
> Key: CALCITE-2322
> URL: https://issues.apache.org/jira/browse/CALCITE-2322
> Project: Calcite
> Issue Type: Improvement
> Components: avatica, core
> Affects Versions: 1.11.0
> Reporter: Kevin Minder
> Priority: Major
> Time Spent: 50m
> Remaining Estimate: 0h
>
> Currently the remote driver defaults to hard coded fetch size of 100 rows. When a connection is operating in HTTP mode having such a small fetch size can add enormous overhead. This is especially true if TLS connections are used and made worse if each connection flows throw multiple proxies. Consider that 100K rows returned 100 rows at a time will make 1K HTTP POST requests. One might say that nobody should ever do that but some tools like Spotfire may end up doing this.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)