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https://issues.apache.org/jira/browse/SQOOP-3285?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16554321#comment-16554321
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Greg Lindholm commented on SQOOP-3285:
--------------------------------------
What needs to happen to get this patch applied?
Is there anything I can do to assist?
> Hcatalog import is loosing precision on DECIMAL fields
> ------------------------------------------------------
>
> Key: SQOOP-3285
> URL: https://issues.apache.org/jira/browse/SQOOP-3285
> Project: Sqoop
> Issue Type: Bug
> Components: hive-integration
> Affects Versions: 1.4.7
> Reporter: Greg Lindholm
> Priority: Major
> Labels: newbie, patch
> Attachments:
> 0001-Fix-DECIMAL-percision-loss-with-Hcatalog-imports.patch
>
>
> Import with hcatalog for DECIMAL fields is loosing precision.
> The bug is in
> org.apache.sqoop.mapreduce.hcat.SqoopHCatImportHelper.convertNumberTypes()
> Internally the BigDecimal value is converted to a Double then back into a
> BigDecimal.
> As a test I imported from a MySQL db a DECIMAL(38,8) field:
> {code:java}
> create table sampledata1 ( n38 DECIMAL(38,8) );
> insert into sampledata1 ( n38 ) values (
> -123456789012345678901234567890.12345678 )
> sqoop import \
> --connect jdbc:mysql://10.210.144.22:3306/greg --username greg -P \
> -m 1 \
> --table sampledata1 \
> --hcatalog-table sampledata1_orc2 \
> --create-hcatalog-table \
> --hcatalog-storage-stanza 'stored as orc'
> {code}
> The result in the hive table does not match the input.
> {noformat}
> Original:
> -123456789012345678901234567890.12345678
> Result:
> -123456789012345677877719597056.00000000{noformat}
> I get the same result with Orc, RCfile, and Avro files.
>
> I believe I found the problem and will provide a patch shortly.
>
>
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