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https://issues.apache.org/jira/browse/DRILL-7887?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17309990#comment-17309990
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ASF GitHub Bot commented on DRILL-7887:
---------------------------------------
luocooong commented on a change in pull request #2193:
URL: https://github.com/apache/drill/pull/2193#discussion_r602738548
##########
File path:
contrib/storage-jdbc/src/main/java/org/apache/drill/exec/store/jdbc/JdbcRecordReader.java
##########
@@ -210,8 +212,8 @@ public void setup(OperatorContext operatorContext,
OutputMutator output) {
String name = columns.get(i - 1).getRootSegmentPath();
// column index in ResultSetMetaData starts from 1
int jdbcType = meta.getColumnType(i);
- int width = meta.getPrecision(i);
- int scale = meta.getScale(i);
+ int width = Math.min(meta.getPrecision(i),
DRILL_REL_DATATYPE_SYSTEM.getMaxNumericPrecision());
Review comment:
Nice idea. Is it possible to add the description of UDF (with the
limitation of precision) in the
[JDBC](https://github.com/apache/drill/blob/gh-pages/_docs/connect-a-data-source/plugins/080-rdbms-storage-plugin.md)
docs?
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> JDBC plugin returns incorrect precision for SUM(DECIMAL) queries
> ----------------------------------------------------------------
>
> Key: DRILL-7887
> URL: https://issues.apache.org/jira/browse/DRILL-7887
> Project: Apache Drill
> Issue Type: Bug
> Affects Versions: 1.19.0
> Reporter: Vova Vysotskyi
> Assignee: Vova Vysotskyi
> Priority: Major
> Fix For: 1.19.0
>
>
> The following query:
> {code:sql}
> SELECT sum(decimal_field * smallint_field) AS `order_total`
> FROM mysql.`drill_mysql_test`.person e
> {code}
> returns {{order_total}} field with {{DECIMAL(42, 2)}} type, but Drill
> supports max presision of 38.
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