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https://issues.apache.org/jira/browse/IOTDB-334?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jialin Qiao closed IOTDB-334.
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Resolution: Fixed
> Move limit parser to Server side
> --------------------------------
>
> Key: IOTDB-334
> URL: https://issues.apache.org/jira/browse/IOTDB-334
> Project: Apache IoTDB
> Issue Type: Improvement
> Reporter: Jialin Qiao
> Priority: Major
> Labels: pull-request-available
> Time Spent: 20m
> Remaining Estimate: 0h
>
> In our query process, SQL will be analyzed by Antlr in the server-side, then
> generated to a logical plan.
> However, query SQL is also parsed in the client (IoTDBQueryResultSet) by the
> following statement to get the value of the limit clause.
> String[] splited = sql.toUpperCase().split("
> s+");
> This causes extra parsing for a query, which will slow down the query speed.
> I recommend moving the limit parsing to the server-side.
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