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In this article
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Overview
You can use this Snap to execute
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an SQL delete as per the configured properties.
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Oracle JDBC Driver Upgrade
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Snap Type
The Oracle Delete Snap is a WRITE-type Snap.
Support for Ultra Pipelines
Works in Ultra Pipelines.
Snap Views
Type | Format | Number of Views | Examples of Upstream and Downstream Snaps | Description |
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Input | Document |
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| The records to be deleted. |
Output | Document |
| NA | This Snap has at most one document output view. If an output view is available, then the original document |
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used to create the statement will be output with the status of the delete executed. | ||||
Error | Error handling is a generic way to handle errors without losing data or failing the Snap execution. You can handle the errors that the Snap might encounter when running the Pipeline by choosing one of the following options from the When errors occur list under the Views tab:
Learn more about Error handling in Pipelines. |
Snap Settings
Info |
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Field Name | Field Type | Description | ||||
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Label Default Value: Oracle Delete | String | Specify 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
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Value: N/A | String/Expression/Suggestion |
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Specify the database schema name. |
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If it is not defined, then the suggestion for the Table Name |
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retrieves all |
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table names of all |
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schemas |
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. |
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The values can be passed using the pipeline parameters but not the upstream parameter. | ||||
Table name*
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Value: |
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N/A | String/Expression/Suggestion |
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Specify the table name to execute the delete |
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statement.
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Delete condition (deletes all records from table if left blank) Default value: N/A Examples: Without using expressions
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Using expressions
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| String/Expression | This is an expression property to specify the SQL WHERE clause of the delete statement. The delete condition may also be passed via an upstream Snap or through the pipeline parameters.
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Number of retries |
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Default value: 0 | Integer/Expression |
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Specify the maximum number of attempts to |
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make to receive a response. The request is terminated if the attempts do not result in a response. | ||||
Retry interval (seconds) Default Value: 1 |
Default value: 1
Integer/Expression |
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Specify the time interval between two successive retry requests. A retry happens only when the previous attempt resulted in an exception. | ||||||||||||||||||
Default Value: Execute only |
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Examples
Following are the two examples, the first one using a conditional update of one of the values that then gets merged into the data using the Oracle - Merge Snap.
Delete student records
The following example pipeline demonstrates how to delete all the student records that have the same scores as Adam's. In this example, we have a table named STUDENT that stores students' scores. It has 3 columns:
ID
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NAME
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SCORE
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Configure the Oracle - Select Snap
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to find the row whose NAME is 'Adam', and pass the row's data to Oracle - Delete Snap
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Configure the Oracle - Delete Snap
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to delete all the rows
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with the same score as Adam's. We use $SCORE to retrieve the data
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from the SCORE Column passed from
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Oracle—Select Snap.
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Error Handling
The second one will showcase error handling.
This example
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pipeline demonstrates the error handling of the Snap.
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We use the same pipeline as the one in Example #1 and let error messages route to the error view:
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Configure the Oracle - Delete Snap to set the Delete condition
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to "Score = $NAME", which is supposed to cause a type mismatch error since column SCORE is of type NUMBER while column NAME is of type VARCHAR2
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. Here is the error message that is routed to the error view:
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Downloads
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