TPT Delete

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Snap type:

Write


Description:

The TPT (Teradata Parallel Transport) Delete Snap allows you to delete the data  by executing the script generated using the upstream document provided by the user.  The Snap deletes the table data with the values provided in the input view and using the delete condition provided in the Delete Condition property, and provides the console output, status code and summary on the output view for any downstream Snap checking for successful execution. 


Queries produced by the Snap have the format:

DELETE FROM CUSTOMER WHERE CUSTOMER_NUMBER LT 100000;

Give the delete Condition as follows: 

empno  LT : empno ( Where : empno is the  place holder which internally represents $empno value coming from the upstream component)
empno < :empno

Allows logical operators like GE (Greater than or equals), GT (Greater than), LT (Less than), LE(Less than or equals), IS NULL, IS NOT NULL etc..
Allows < , > , <=, >= etc.  


The TPT Snaps are built to handle the bulk input documents. The TPT Delete Snap is designed to execute only if there are input documents. The Snap does not to execute when there is no input document. 

The equalTo '=' operator is not allowed to use with a PI (Primary Index) column. However, if the table has more than one PI columns, you can use them as partial PI columns.


  • Expected upstream Snaps: Any Snap that provides a document output view, such as Structure or a JSON Generator Snap.
  • Expected downstream Snaps: Any Snap with a document input view
  • Expected input: A stream of documents to be loaded into the table. Each input document contains values for one record in the table.
  • Expected output: A single document containing the console output, return status from tbuild and the script which the Snap submitted to tbuild.


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:

  • Download the Teradata Tools and Utilities base such as TTU 16.20.25.00 Linux - Base 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.

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:
InputThis Snap has at most one Document view.
OutputThis Snap has at most one output view.
Error

This Snap has at most one error view and produces zero or more documents in the view. 

A single document containing the console output and return status from the external TPT application for each input document

 


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.


Schema name



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.

The values can be passed using the pipeline parameters but not the upstream parameter.

Example: SYS

Default value: [None] 

Table name

Required. Name of the table to insert records into.

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.
Note: The location will be on the Snapplex.

Example: /usr/bin/tbuild

Default value: [None]

Delete Condition


Delete Statement to be executed to delete the table data which matches given delete condition. If no condition specified in the Delete Condition field then entire table data will be deleted from the specified database. Please note that, due to Teradata's requirement, an equality operator '=' is not allowed with PI (Primary Index). For example, if 'empno' is a PI, "empno=:empno" will cause an error "RDBMS error 3537: A MultiLoad DELETE Statement is Invalid."

Example:  empno < 1000
                     empno LT :empno

Default value: [None] 

Snap execution

Select one of the three modes in which the Snap executes. Available options are:

  • Validate & Execute: Performs limited execution of the Snap, and generates a data preview during Pipeline validation. Subsequently, performs full execution of the Snap (unlimited records) during Pipeline runtime.
  • Execute only: Performs full execution of the Snap during Pipeline execution without generating preview data.
  • Disabled: Disables the Snap and all Snaps that are downstream from it.


Example


 In this pipeline, the TPT Delete Snap deletes the TPT table items by providing a delete query condition. The TPT Insert Snap inserts the values into the TPT records via the upstream JSON Generator Snap. 


 

The upstream JSON Generator Snap supplies the values to be inserted into the records of the target TPT Table. The respective output preview is as displayed:



The TPT insert Snap inserts the values into the records of the TPT table Table Delete under the schema, ADW SNAPL. Additionally provide the Fetch metadata delay field with a time of 5secs to avoid the conflict of parallel TPT executions in the pipeline. 


 


The output preview at the TPT Insert Snap is as displayed below: 


 


The Mapper Snap maps the values to the target path, here, the value 103 is mapped to the column empno.



The TPT Delete Snap deletes the items from the table, "ADW_SNAPL"."Delete_Table item1" by  providing the delete condition, empno > :empno which deletes all the items that have the empno greater than the value 103. Leave the Delete Condition field empty if the entire table needs to be deleted. 


The successful execution of the pipeline displays the below output preview:

(Note that the two rows having the value greater than103 have been deleted from the table)


Snap Pack History

 Click to view/expand
Release Snap Pack VersionDateType  Updates

August 2024

main27765

 

Stable

Upgraded the org.json.json library from v20090211 to v20240303, which is fully backward compatible.

May 2024437patches26471 LatestThe jOOQ library for Teradata Snap Pack is upgraded from v3.9.1 to v3.17.3. This upgrade will be part of the GA release on August 14, 2024 (Stable release). Pipelines using the Teradata Snaps are not impacted after the jOOQ upgrade.

May 2024

main26341

 


Stable

Updated and certified against the current SnapLogic Platform release.

February 2024

main25112

 

Stable

Updated and certified against the current SnapLogic Platform release.

November 2023main23721 StableUpdated and certified against the current SnapLogic Platform release.

August 2023

main22460

 


Stable

The Teradata Execute Snap now includes a new Query type field. When Auto is selected, the Snap tries to determine the query type automatically.

May 2023

main21015 

Stable

Upgraded with the latest SnapLogic Platform release.

February 2023main19844 StableUpgraded with the latest SnapLogic Platform release.
November 2022main18944 Stable

The TPT Insert Snap now creates the target table only from the table metadata of the second input view when the following conditions are met:

  • The Create table if not present checkbox is selected.

  • The target table does not exist.

  • The table metadata is provided in the second input view.

August 2022main17386 StableUpgraded with the latest SnapLogic Platform release.
4.29 Patch429patches16235 Latest

Fixed an issue with Teradata Execute Snap where the Snap did not display valid error message when the delete condition is invalid.

4.29main15993 Stable

Enhanced the Teradata FastExport Snap with Character Set dropdown list to support encoding of data when you export data from the Teradata Database.

4.28main14627 StableUpgraded with the latest SnapLogic Platform release.
4.27main12833 Stable

Enhanced the Teradata Execute Snap to invoke stored procedures.

4.26main11181 StableUpgraded with the latest SnapLogic Platform release.
4.25 Patch425patches11008 Latest

Improved the error messages for all the Snaps in the Teradata Snap Pack where the Snaps fail with a null pointer exception error when the account reference provided is invalid. 

4.25main9554
 
StableUpgraded with the latest SnapLogic Platform release.

4.24 Patch

424patches8799 Latest
  • Enhanced the Teradata Execute Snap by adding a new field, Advanced options, which extends support with microsecond precision for TIMESTAMP data type.
  • Fixed an issue in the TPT Load Snap where the Snap failed to load data into the table while creating an output.
  • Fixed an issue with the TPT Load Snap wherein now a null value is loaded as null and empty string is loaded as empty string.

    • This fix may cause existing pipelines to fail if empty string values are expected to be loaded as null.

    • Following are the new configurations:

      • VARCHAR QuotedData= Optional

      • VARCHAR OpenQuoteMark= \”

      • VARCHAR NullColumns= Yes

4.24main8556
Stable

Enhanced the Teradata Select Snap to return only the selected output fields or columns in the output schema (second output view) using the Fetch Output Fields In Schema check box. If the Output Fields field is empty all the columns are visible.

4.23main7430
 
Stable

Fixes the multi-line value issue and issue in the TPT Load Snap where the Snap writes null for both an empty string and null values in the input data. The fix for this issue was to add the following three lines in the script and wrap all the values in double quotes unless they are null while writing the input data into a temp CSV file. 
VARCHAR QuotedData = 'Optional',
VARCHAR OpenQuoteMark = '\"'
VARCHAR NullColumns = 'Yes'

This fix may cause existing pipelines to fail if empty string values are expected to be loaded as null.

4.22main6403
 
StableUpgraded with the latest SnapLogic Platform release.

4.21 Patch

421patches6272 Latest

Fixed the issue where Snowflake SCD2 Snap generates two output documents despite no changes to Cause-historization fields with DATE, TIME and TIMESTAMP Snowflake data types, and with Ignore unchanged rows field selected.

4.21 Patch

421patches6144 Latest

Fixed the following issues with DB Snaps:

  • The connection thread waits indefinitely causing the subsequent connection requests to become unresponsive.
  • Connection leaks occur during Pipeline execution.

4.21 Patch

MULTIPLE8841 Latest

Fixed the connection issue in Database Snaps by detecting and closing open connections after the Snap execution ends. 

4.21snapsmrc542

 

StableUpgraded with the latest SnapLogic Platform release.
4.20snapsmrc535
 
StableUpgraded with the latest SnapLogic Platform release.

4.19 Patch 

db/teradata8414 LatestFixed an issue with the TPT Update Snap wherein the Snap is unable to perform operations when:
  • An expression is used in the Update condition property.
  • Input data contain the character '?'.
4.19snaprsmrc528
 
StableUpgraded with the latest SnapLogic Platform release.
4.18snapsmrc523
 
StableUpgraded with the latest SnapLogic Platform release.
4.17ALL7402
 
Latest

Pushed automatic rebuild of the latest version of each Snap Pack to SnapLogic UAT and Elastic servers.

4.17snapsmrc515
 
Latest
  • Fixed an issue with the Teradata Execute Snap wherein the Snap would send the input document to the output view even if the Pass through field is not selected in the Snap configuration. With this fix, the Snap sends the input document to the output view, under the key original, only if you select the Pass through field.
  • Added the Snap Execution field to all Standard-mode Snaps. In some Snaps, this field replaces the existing Execute during preview check box.
4.16snapsmrc508
 
StableUpgraded with the latest SnapLogic Platform release.

4.15 Patch 

db/teradata6338 Latest

Replaced Max idle time and Idle connection test period properties with Max life time and Idle Timeout properties respectively, in the Account configuration. The new properties fix the connection release issues that were occurring due to default/restricted DB Account settings.

4.15snapsmrc500
 
StableUpgraded with the latest SnapLogic Platform release.
4.14snapsmrc490
 
StableUpgraded with the latest SnapLogic Platform release.
4.13

snapsmrc486

 
StableUpgraded with the latest SnapLogic Platform release.
4.12

snapsmrc480

 
StableUpgraded with the latest SnapLogic Platform release.
4.11snapsmrc465
 
StableUpgraded with the latest SnapLogic Platform release.
4.10

snapsmrc414

 
Stable

Added Auto commit property to the Select and Execute Snaps at the Snap level to support overriding of the Auto commit property at the Account level.

4.9.0 Patch

teradata3077 Latest

Fixed an issue regarding connection not closed after login failure; Expose autocommit for "Select into" statement in PostgreSQL Execute Snap and Redshift Execute Snap

4.9snapsmrc405
 
Stable
  • Enhanced the Output view of the Snap with Order Summary field that displays the output values (added to the out, err, status, classpath and env fields of the single output view that display the subprocess only).
  • Teradata Export to HDFS Snap supported with Dynamic account.
4.8

snapsmrc398

 
Stable
  • Introduced the TPT Delete, Insert, Load, Upsert and Update Snaps in this release.
  • Introduced Teradata Export to HDFS Snap in this release.
  • Info tab added to accounts.
  • Database accounts now invalidate connection pools if account properties are modified and login attempts fail.
4.7

snapsmrc382

 
Stable
  • Introduced the Teradata FastLoad and Execute Snaps in this release.
  • Migration impact: In Teradata FastExport, the values of the Data Format field have been standardized to be in all caps. Existing pipelines that use the values of Binary, Text, or Unformatted will fail unless the new value of BINARY, TEXT, or UNFORMAT are used.
4.6snapsmrc362
 
Stable

Snap Pack introduced in 4.6.0. This includes only Teradata extract functionality to move data out of Teradata database using the FastExport Utility. It does not include Snaps for load, select, insert, delete, execute or others at this time. It also does not utilize the Teradata Parallel Transporter to extract data.