Teradata FastLoad

Write

The Teradata FastLoad Snap uses the "FastLoad" command installed in the Operating System to load data into empty tables. Teradata FastLoad program should be installed on the Snaplex where the Snap is being executed. The Snap generates a script based on the field mapping which is executed using the FastLoad program that is installed on the OS. The Snap also captures the output generated from the FastLoad program (in the OS) and writes to the OUT field in the output views.

Queries produced by the Snap have the format:

• Expected downstream Snaps: A Snap monitoring the exit code to check result status.

• Expected input: None or documents with values to evaluate expression properties in the Snap. Each input document triggers one execution of the script.

• Expected output: A single document containing the console output and return status from the external Teradata application for each input document

TPT Snaps (TPT Insert, TPT Update, TPT Delete, TPT  Upsert and TPT Load) uses the 'tbuild' utility for the respective operations.

In order to use these Snaps in the pipelines, the respective TPT utilities should be installed/available on the Snapplexes. 

Procedure to install the Teradata tools and utilities:

• Download the Teradata Tools and Utilities base such as TeradataToolsAndUtilitiesBase__Linux_i386-x8664.15.10.06.00.tar.gz for Linux environment.

• If the OS is 64 bit,  install 32 bit support packages on the environment and also any further dependencies

• Install the Teradata Tools and Utilities (that includes tbuild, fastload, mload etc)

• The default installation also configures the PATH in the OS

Flow:  If the tbuild or fastload is already available on the OS path then the corresponding TPT Snap can invoke the required utility, however, if these binaries are not available on the OS path, then we need to provide the absolute path of the respective binary in the Snap.

Works in Ultra Tasks.

When the upstream Snap passes empty strings as two consecutive delimiter characters, this Snap inserts null values into the corresponding fields of the table in the Teradata database. Also, if the last character in a record is a delimiter character, and if there is at least one more field to be processed, this Snap inserts null value in the field corresponding to the next one to be processed.

See Null Fields section in the Teradata documentation for more information.

When the Teradata FastLoad Snap pauses, both the target and error tables get locked.

Workaround: You must manually drop these tables before retrying the fast-load job.

This Snap uses account references created on the Accounts page of SnapLogic Manager to handle access to this endpoint. See Configuring Teradata Database Accounts for information on setting up this type of account.

Required. The name for the Snap. You can modify this to be more specific, especially if you have more than one of the same Snap in your pipeline.

The database schema name. In case it is not defined, the suggestion for the table name will retrieve all the table names of all the schemas. The property is suggestible and will retrieve available database schemas during suggest values.

Example: SYS

Default value: [None] 

Required. Name of the table to execute a select query on.

Example: people

Default value: [None] 

Whether the table should be automatically created if not already present.

Default value: [None] 

The absolute path for FastLoad command. If this field is left blank then the Snap tries to load the Fastload command from the Operating System.

Default value: [None] 

Required. Value that specifies the number of rows transmitted to the Teradata Database between checkpoints using the CHECKPOINT. If the value is set to 0, then the checkpoint is not enabled during Fastload execution. 

Default value: 0 

Writes all the records from error tables to an error view after a Fastload execution is completed.

Default value: Not Selected 

Specify the name-value pairs to use in the session's generated query band statement. The query band is passed to the Teradata database as a list of name-value pairs separated by semi-colons.

Default Value: N/A
Example: ProjectName=dstage1;user=test;

SnapDataException

The Snap loads records with value more than the data type size

Manually drop the tables and retry.

Failure: TPT script failed to execute

error code: 8

The Snap is unable to read the Fastload absolute path.

Leave the field blank or update the Fastload absolute path with .exe extension to prevent your pipeline from failing.

For example, if you used /usr/bin/fastloadas the Fastload absolute path, change it to /usr/bin/fastload.exe.

Failure: Failed to execute query

error code: 5992

A syntax error was found in the QUERY_BAND.

Check that the query band is in the form specified in the Query band field above.

For example, if you used priority=1;workload=high in the Query band, add a semi-colon and update the value to priority=1;workload=high;.