TPT Update
- Amritesh Singh
- Aparna Tayi (Unlicensed)
- Anand Vedam
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Snap type: | Write | |||||||
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Description: | The TPT (Teradata Parallel Transport) Update Snap allows you to update the data from an input view by executing the script generated using the fields provided by the user in the Snap fields. The Snap updates the table with the values provided in the input view and using the where clause, provides the console output and status code on the output view for any downstream Snap checking for successful execution. Queries produced by the Snap have the format: UPDATE table_name SET column1=value1,column2=value2,... WHERE some_column=some_value;
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| Prerequisites: | 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. All the required TPT utilities must be installed on the node where JCC is running or the Snap simply executes but may not perform the operation. Any utility/library file missing on the node may cause the Snap to perform a failed operation. | |||||||
Basic steps for installing the TPT utilities: | Procedure to install the Teradata tools and utilities:
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. | |||||||
| Support and limitations: | None. | |||||||
| Account: | 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. | |||||||
| Views: |
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Settings | ||||||||
Label | 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. Default value: TPT Update | |||||||
Schema name | The database schema name. In case it is not defined, then the suggestion for the table name will retrieve all tables names of all schemas. The property is suggestible and will retrieve available database schemas during suggest values. The values can be passed using the pipeline parameters but not the upstream parameter. Example: SYS Default value: [None] | |||||||
| Table name | Name of the table to execute the update on. The values can be passed using the pipeline parameters but not the upstream parameter. Example: people Default value: [None] | |||||||
TBUILD location | Location of the TBUILD application Example: /usr/bin/tbuild Default value: [None] It will be present on the Snapplex. | |||||||
| Fetch metadata delay (seconds) | The wait time in seconds to be used before fetching metadata to avoid conflicts while performing Teradata parallel executions in a pipeline. Default value: 0 | |||||||
Where columns | Required. Where clause of the select statement. Columns to use to in, where a condition of the update query to check for existing entries in the target table, the value for the column is given from the input document. The primary columns should be included in both, the Where columns and the Primary partition columns properties. Example: email Default value: [None] | |||||||
Primary partition columns | Required. Add all the primary and partition columns for the given table, that are excluded from the "SET" operation as the TPT Script doesn't support primary or partition key as the update fields. The TPT Update Snap does not support NOPI (No Primary Index) tables. Example: id name Default value: None | |||||||
Snap execution | Select one of the three modes in which the Snap executes. Available options are:
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Example
In this pipeline, the TPT Update Snap updates the values in the records of the TPT table using the upstream JSON Generator Snap. The error view is enabled for the invalid records to be routed to the error view.
The JSON Generator Snap passes the values to be updated on the TPT table.
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The TPT Update Snap updates the records on the table, Insert Sample3 under the schema, ADW SNAPL.
Note that the Where Columns are to be supplied with the condition(s) to check for the existing entries on the target table. The value for the column is supplied via the upstream JSON Generator Snap. In this example the primary key value is empno which is included in the Where columns as well as the Primary Partition columns fields of the Snap.
The successful execution of the pipeline displays the below output preview:
Snap Pack History
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