Teradata Fastload Reference Manual



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For more information, see Teradata FastLoad Reference documentation. TStatCatcher Statistics Select this check box to collect log data at the component level. Teradata FastLoad can be used to load CSV/TSV or other delimited files into database. Refer to article Teradata FastLoad - Load CSV File for more details about how to load CSV into Teradata. This article shows how to skip header line or multiple lines in the input file. So, I found some obsure information in the fastload reference manual that states fastload cannot support data files larger than 2 Gb on Windows systems becasue of old 32-bit architecture. The workaround was to use the 'LARGE FILE' AXSMOD. Unfortunantly, the AXSMOD source code is missing or no longer available that I can find.

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Teradata Fastload Reference Manual
TeradataFastload

FastLoad utility is used to load data into empty tables. Since it does not use transient journals, data can be loaded quickly. It doesn't load duplicate rows even if the target table is a MULTISET table.

Limitation

Target table should not have secondary index, join index and foreign key reference.

How FastLoad Works

FastLoad is executed in two phases.

Phase 1

  • The Parsing engines read the records from the input file and sends a block to each AMP. Twixtor mac.

  • Each AMP stores the blocks of records.

  • Then AMPs hash each record and redistribute them to the correct AMP.

  • At the end of Phase 1, each AMP has its rows but they are not in row hash sequence.

Phase 2

Teradata Fastload Csv

  • Phase 2 starts when FastLoad receives the END LOADING statement.

  • Each AMP sorts the records on row hash and writes them to the disk.

  • Locks on the target table is released and the error tables are dropped.

Example

Create a text file with the following records and name the file as employee.txt.

Following is a sample FastLoad script to load the above file into Employee_Stg table.

Teradata Fastload Reference Manual User

Executing a FastLoad Script

Once the input file employee.txt is created and the FastLoad script is named as EmployeeLoad.fl, you can run the FastLoad script using the following command in UNIX and Windows.

Once the above command is executed, the FastLoad script will run and produce the log. In the log, you can see the number of records processed by FastLoad and status code.

FastLoad Terms

Following is the list of common terms used in FastLoad script.

  • LOGON − Logs into Teradata and initiates one or more sessions.

  • DATABASE − Sets the default database.

  • BEGIN LOADING − Identifies the table to be loaded.

  • ERRORFILES − Identifies the 2 error tables that needs to be created/updated.

  • CHECKPOINT − Defines when to take checkpoint.

  • SET RECORD − Specifies if the input file format is formatted, binary, text or unformatted.

  • DEFINE − Defines the input file layout.

  • FILE − Specifies the input file name and path.

  • INSERT − Inserts the records from the input file into the target table.

  • END LOADING − Initiates phase 2 of the FastLoad. Distributes the records into the target table.

  • LOGOFF − Ends all sessions and terminates FastLoad.