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https://issues.apache.org/jira/browse/DRILL-3510?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15926826#comment-15926826
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ASF GitHub Bot commented on DRILL-3510:
---------------------------------------
Github user vdiravka commented on a diff in the pull request:
https://github.com/apache/drill/pull/520#discussion_r106263502
--- Diff:
exec/jdbc/src/main/java/org/apache/drill/jdbc/impl/DrillDatabaseMetaDataImpl.java
---
@@ -184,6 +184,17 @@ private ServerMeta getServerMeta() throws SQLException
{
return serverMeta;
}
+ /**
+ * The same as {@link DrillDatabaseMetaDataImpl#getServerMeta()} but
updates server metadata for the every call
+ * @return server meta information
+ * @throws SQLException for error when getting server meta
+ */
+ private ServerMeta getUpdatedServerMeta() throws SQLException {
--- End diff --
SQL Server, for example, updates metadata in some cases
https://www.mssqltips.com/sqlservertip/1415/determining-set-options-for-a-current-session-in-sql-server/
Quoting_identifiers can be changes as system option. In this case any user
can get the right and actual quoting_identifiers method from server_metadata.
> Add ANSI_QUOTES option so that Drill's SQL Parser will recognize ANSI_SQL
> identifiers
> --------------------------------------------------------------------------------------
>
> Key: DRILL-3510
> URL: https://issues.apache.org/jira/browse/DRILL-3510
> Project: Apache Drill
> Issue Type: Improvement
> Components: SQL Parser
> Reporter: Jinfeng Ni
> Assignee: Vitalii Diravka
> Labels: doc-impacting
> Fix For: 1.10.0
>
> Attachments: DRILL-3510.patch, DRILL-3510.patch
>
>
> Currently Drill's SQL parser uses backtick as identifier quotes, the same as
> what MySQL does. However, this is different from ANSI SQL specification,
> where double quote is used as identifier quotes.
> MySQL has an option "ANSI_QUOTES", which could be switched on/off by user.
> Drill should follow the same way, so that Drill users do not have to rewrite
> their existing queries, if their queries use double quotes.
> {code}
> SET sql_mode='ANSI_QUOTES';
> {code}
>
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