DB Delete (Table)

Deletes all data rows from the selected database table that match the values of a row from the selected KNIME input table columns. All selected column names of the KNIME table need to exactly match the column names inside the database. Only the rows matching all values of the selected column of any given input row will be deleted. The column order of the KNIME table and the database table do not need to match.
The output table contains two additional columns if Append delete statuses checkbox is checked. The first extra columns is the number of rows affected by the DELETE statement. A number greater than or equal to zero -- indicates that the command was processed successfully and is an update count giving the number of rows in the database that were affected by the command's execution. A value of -2 -- indicates that the command was processed successfully but that the number of rows affected is unknown. The second shows a warning message, if any.

Options

Settings

Table to delete
Click Select a table to select the table to delete from in the pop up dialog, or enter a valid Schema and Table name into the input fields.
Batch size
Enter a number greater than 0 for the number of rows deleted in one batch job. Entering 1 disables batch processing. This way only one row is processed at a time.
Fail on error
Disable this if you want to continue after a database error.
Append delete status columns
Enable this to append two additional (status and error) columns to the output table (see description).
Disable DB Data output port
Select this option to disable the DB Data output port and the execution of the metadata query at the end of the node execution which might cause problems with databases that do not support subqueries.
Select identification columns (WHERE in SQL)
Select all columns used to identify the records in the database that should be deleted. Only records in the database that match all values from a row of the input table are deleted. The column names in the KNIME input table need to match the column names in corresponding database table. In SQL this is equivalent to the WHERE columns.

Output Type Mapping

This tab allows you to define rules to map from KNIME types to database types.

Mapping by Name
Columns that match the given name (or regular expression) and KNIME type will be mapped to the specified database type.
Mapping by Type
Columns that match the given KNIME type will be mapped to the specified database type.

Input Ports

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KNIME data table with the data rows to be deleted from the database.
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DB Connection to the database.

Output Ports

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Input KNIME data table with additional columns providing the number of affected rows in the database and warnings, if checked in the dialog.
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DB Data referencing the selected database table.

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Installation

To use this node in KNIME, install the extension KNIME Database from the below update site following our NodePit Product and Node Installation Guide:

v5.4

A zipped version of the software site can be downloaded here.

Plugin provider: KNIME AG, Zurich, Switzerland
Plugin version: 5.4.0.v202410281607
On NodePit since: 2024-12-06
Last update: 2024-12-17
Tags: Streamable
KNIME versions: Since v3.6

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