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https://issues.apache.org/jira/browse/CALCITE-5841?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated CALCITE-5841:
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Labels: pull-request-available (was: )
> Improve the logic of creating JDBCMeta singleton in calcite plus
> ----------------------------------------------------------------
>
> Key: CALCITE-5841
> URL: https://issues.apache.org/jira/browse/CALCITE-5841
> Project: Calcite
> Issue Type: Improvement
> Components: extensions
> Affects Versions: 1.34.0
> Reporter: Ran Tao
> Assignee: Ran Tao
> Priority: Major
> Labels: pull-request-available
>
> current the logic of creating JdbcMeta singleton could be not safe in
> multi-thread occasion.
> we can add double-checking.
> {code:java}
> private static JdbcMeta getInstance() {
> if (instance == null) {
> try {
> instance =
> new JdbcMeta(CalciteConnectionProvider.DRIVER_URL,
> CONNECTION_PROVIDER.provideConnectionInfo());
> } catch (SQLException | IOException e) {
> throw new RuntimeException(e);
> }
> }
> return instance;
> } {code}
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