Db2 import data from file

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Figure The message file also serves as a very good progress indicator, because you can access this file while the utility is running. If you have import failures due to invalid input, for example, you can use the message file generated from an import command that uses the commitcount and messages options to identify which record failed.

This is a very handy method to restart a failed import. Here is an example:. The import utility also has the modified by clause to allow customization.

Some modifiers supported in the export utility also apply to the import utility. The following sections describe some of the more useful modifiers. Tables with generated columns or identity columns are defined in a way that column values will be automatically generated when records are inserted into the tables. Since import operations perform inserts in the background, new values will be generated at the target server. Therefore, you need to decide whether values stored in the source input file should be used or if new values should be generated.

The import utility supports a few file type modifiers to take care of that. The file modifier generatedignore forces the import utility to ignore data for all generated columns presented in the data file. The utility generates the values of those columns. The file modifier identityignore behaves the same way as generatedignore. You can use the generatemissing modifier to inform the import utility that the input data file contains no data for the generated columns not even NULLs , and the import utility will therefore generate a value for each row.

This behavior also applies to identitymissing modifier. If you are exporting LOB data in separate files as described in Section Consider the following import command. This command takes mgrresume. With the lobsinfile modifier, the utility searches the paths specified in the lobs from clause for the LOB location specifier LLS.

Notice that an additional clause, long in lobts , is added to the create into option. It indicates that all LOB data will be created and stored in lobts table space. If this clause is omitted, LOB data will be stored in the same table space with the other data. Typically, we recommend that you use DMS table space and keep regular data, LOB data, and indexes in different table spaces.

There are three ways to select particular columns you want to import. This method only supports ASC files. Another question might be whether your concurrent queries will return erroneous results if you load or import just a single table at a time Serge Rielau.

Morten The "hierarchy level" refers to typed table hierarchies. Nothing you have to worry about. Mark A. Ken Keep in mind that since import does inserts, it could fire triggers defined on the tables.

Load will not fire any triggers. If doing an import, you should use the commitcount parm to do a commit every rows or so if you have a large amount of data to import. This will keep the logs from filling up. Doug Crowson. This is LUW, 8.

Yeah, i try very hard to avoid using load on a transactional database. In the case of my warehouse, it is non-transactional - and the load files are the backups: if a recovery is required we move the compressed files from archive to input, and the loader takes care of it.

Simplifies most things. Other than that, a long lockwaittime of seconds or so assuming average query duration of 5 seconds has worked fine. Especially when concurrency is tricky. Obviously you've been around the block a few times, but from a concurrency perspective, you do realize that IMPORT by default takes an exclusive lock on the table it is writing to, right? In other words, if for example the 3rd field of the table is defined as numerical 5 along which 2 decimals, the content of the 3rd field in all lines of the CSV file must be either null or contain a valid number with at most 3 integers and 2 decimals and must there is the decimal separator character or comma or dot.

For every error that the DB2 finds trying to import the contents of the various fields of the CSV file, a message is recorded in the job joblog and the line affected by the error is discarded.

In the message present in the joblog it is in most cases specified exactly on which field the problem was found. It is a possibility perhaps little known, but very convenient to identify more easily the lines that are rejected by the import. Very useful especially when the csv file contains hundreds or thousands of lines. If you have doubts about the end-of-line character of a csv file, you can open and check the last characters of the line by displaying them in hexadecimal mode.

Move the view to the right until the end of the line is shown: type in the column placement the last column of the text file.