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https://issues.apache.org/jira/browse/HIVE-1631?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13080819#comment-13080819
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Mythili Gopalakrishnan commented on HIVE-1631:
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Fixing some typos from previous comment
Just tested this fix and does NOT work correctly. Here are my findings on a
FLOAT column
Without Patch on a FLOAT Column
--------------------------------
DatabaseMetaData.getColumns () COLUMN_SIZE returns 12
DatabaseMetaData.getColumns () DECIMAL_DIGITS - returns 0
ResultSetMetaData.getPrecision() returns 0
ResultSetMetaData.getScale() returns 0
With Patch on a FLOAT Column
----------------------------
DatabaseMetaData.getColumns () COLUMN_SIZE returns 24
DatabaseMetaData.getColumns () DECIMAL_DIGITS - returns 0
ResultSetMetaData.getPrecision() returns 7
ResultSetMetaData.getScale() returns 7
Also both DatabaseMetadata and ResultSetMetaData must return the same
information for Precision and Scale for FLOAT,DOUBLE types.
> JDBC driver returns wrong precision, scale, or column size for some data types
> ------------------------------------------------------------------------------
>
> Key: HIVE-1631
> URL: https://issues.apache.org/jira/browse/HIVE-1631
> Project: Hive
> Issue Type: Bug
> Components: JDBC
> Affects Versions: 0.7.0
> Reporter: Steven Wong
> Assignee: Patrick Hunt
> Priority: Minor
> Fix For: 0.8.0
>
> Attachments: HIVE-1631.patch
>
>
> For some data types, these methods return values that do not conform to the
> JDBC spec:
> org.apache.hadoop.hive.jdbc.HiveResultSetMetaData.getPrecision(int)
> org.apache.hadoop.hive.jdbc.HiveResultSetMetaData.getScale(int)
> org.apache.hadoop.hive.jdbc.HiveResultSetMetaData.getColumnDisplaySize(int)
> org.apache.hadoop.hive.jdbc.JdbcColumn.getColumnSize()
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