-Re: Sqoop import - column removed in the source DB and all the records are off by 1 column.
Anandha L Ranganathan 2012-12-02, 04:13
I went with second option.
giving "select col1, col2, NULL as col3, col4" was throwing
So I went with
"Select col1,col2,'col3' as col3, col4"
The second option --query looks good but is it support partition ?
On Sat, Dec 1, 2012 at 10:03 AM, Jarek Jarcec Cecho <[EMAIL PROTECTED]>wrote:
> Hi Anandha,
> I do have couple of suggestions that could help in your scenario:
> 1) Rename your hive table to "TABLENAME_OLD" or something and let Sqoop
> create new hive table with proper schema. This way you will not loose any
> data nor appropriate schema, however you will end up with two tables.
> 2) Change your table based import to query based import and select one
> column extra:
> --query "select col1, col2, NULL as col3, col4, ..."
> On Fri, Nov 30, 2012 at 06:15:02PM -0800, Anandha L Ranganathan wrote:
> > In my Sqoop import one of the column in the source table got deleted and
> > that resulting in data issue. This resulting data are off by 1 column.
> > The removed column was in the middle of the schema. If it were last
> > then wouldn't have any worries.
> > Data is imported from MySql to Hive using Sqoop. I am using
> > Here is the syntax.
> > sqoop import --hive-import
> > --options-file 'credential.txt'
> > --table 'TABLENAME '
> > --where 'created between 1353960000000 and 1353963600000'
> > --hive-partition-key part
> > --hive-partition-value 'PARTITION_VALUE'
> > --hive-overwrite
> > --hive-delims-replacement
> > Now the problem is One of the column in the source DB got removed.
> > I tried with workaround by including the --columns
> > 1) By hardcoding third column with quotes.
> > --columns "col1,col2,'col3' as col3,col4"
> > but this gives error Column name 'col3' not in table
> > 2) Then i tried with (col2 repeated twice)
> > --columns " col1,col2, col2 , col4"
> > It threw an error
> > Imported Failed: Duplicate Column identifier specified:
> > 3) Then i tried with (col2 as col3)
> > --columns " col1,col2, col2 as col3, col4"
> > ERROR tool.ImportTool: Imported Failed: Column name 'authid uuid' not in
> > table
> > Could anybody suggest workaround for this.
> > Thanks