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Snap type:

Write

Description:

This Snap executes a SQL Merge with given properties. The documents that are provided on the input view will be merged into the provided table on the provided database. Each document on the input view is expected to be merged or created with/as a new record in the table. Unlike Oracle - Merge and SQL Server - Merge Snaps, MySQL - Merge Snap does not have Merge condition property. This is because MySQL operates merge on its primary key only. Therefore, input data must contain the value of the primary key for the merge operation to work.

Merges will be batched up until the account's batch size property or until the structure of the update statement changes. An update statement will change if an incoming document contains different keys than a previous document.

Queries produced by the Snap have the format:

 MERGE INTO tablename USING table_reference ON (condition)
    WHEN MATCHED THEN
    UPDATE SET column1 = value1 [, column2 = value2 ...]
    WHEN NOT MATCHED THEN
    INSERT (column1 [, column2 ...]) VALUES (value1 [, value2 ...]);

More info on SQL Merges can be found at http://en.wikipedia.org/wiki/Merge_(SQL) and http://www.h2database.com/html/grammar.html#merge

Prerequisites:

[None]

Support and limitations:

Works in Ultra Tasks.
When MySQL execute Snaps (MySQL - Execute and MySQL - Multi Execute) are followed by MySQL non-execute Snaps, such as MySQL - Insert, MySQL - Merge, and so on, the following error is displayed when executed:
Table definition has changed, please retry transaction.
This happens due to a known issue in the MySql Connector. For more information about this issue, see MySQL Bug #65378.

Account:

This Snap uses account references created on the Accounts page of SnapLogic Manager to handle access to this endpoint. See MySQL Account for information on setting up this type of account.

Views:

Input	This Snap has exactly one document input view.
Output	This Snap has at most one document output view. If an output view is available, then the original document that was used to create the statement will be output with the status of the merge executed.
Error	This Snap has at most one document error view and produces zero or more documents in the view.

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, 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

Required.The name of table to execute the insert on.

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

Example: people

Default value: [None]

Number of retries

Specifies the maximum number of attempts to be made to receive a response. The request is terminated if the attempts do not result in a response.

When you enable retry and a connection failure occurs that cannot be recovered by retry, the Snap writes a connection failure error in the error view. In some cases, the error view records might contain duplicate data that was written to the database. Ensure to verify all the records in the error file before you restart the merge request. You can locate the duplicate records in the error view by checking the $reason property for the sub-string: Connection is not available, request timed out.

Example: 3

Default value: 0

If the value is larger than 0, the Snap first downloads the target file into a temporary local file. If any error occurs during the download, the Snap waits for the time specified in the Retry interval and attempts to download the file again from the beginning. When the download is successful, the Snap streams the data from the temporary file to the downstream Pipeline. All temporary local files are deleted when they are no longer needed.
Ensure that the local drive has sufficient free disk space to store the temporary local file.

Retry interval (seconds)

Specifies the time interval between two successive retry requests. A retry happens only when the previous attempt resulted in an exception.

Example: 10

Default value: 1

When you enable retry and a connection failure occurs that cannot be recovered by retry, the Snap writes a connection failure error in the error view. In some cases, the error view records might contain duplicate data that was written to the database. Ensure to verify all the records in the error file before you restart the merge request. You can locate the duplicate records in the error view by checking the $reason property for the sub-string: Connection is not available, request timed out.

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 records from two different input streams are merged into a MySQL table using the MySQL Merge Snap. The upstream input from the Mapper Snap and the CSV Generator Snap are joined by the Join Snap. The new MySQL table will now have the records with columns passed from both the input sources.

The MySQl Select Snap retrieves the records from the table, `pqadb`.`TAM_SAMPLE_PERSONS` to be merged into a table `pqadb`.`TAM_SAMPLE_PERSONS_MERGE`.

The Snap settings and the output preview is as displayed below:

The Mapper Snap maps the records to be merged with the MySQL table, `pqadb`.`TAM_SAMPLE_PERSONS_MERGE`.

The CSV Generator passes the records to be merged into the MySQL table, `pqadb`.`TAM_SAMPLE_PERSONS_MERGE`.

The output preview at the CSV Generator Snap is as displayed below:

The Join Snap joins both the input streams and the output preview is as displayed below:

Note that the input from the CSV Generator Snap had three columns only and hence the remaining columns are displayed as null.

The MySQL Merge Snap merges the input documents into the table `pqadb`.`TAM_SAMPLE_PERSONS_MERGE`.

The output preview at the MySQL Merge Snap is as displayed below:

Snap Pack History

Click to view/expand

Release	Snap Pack Version	Date	Type	Updates
August 2024	main27765	21 Aug 2024	Stable	Updated and certified against the current Snaplogic Platform release.
May 2024	437patches26298	09 May 2024	Latest	Fixed an issue with the MySQL - Multi Execute Snap and the MySQL - Execute Snaps that displayed a `null pointer exception` when the Snap did not check `null` table metadata.
May 2024	main26341	08 May 2024	Stable	Updated the Delete Condition (Truncates a Table if empty) field in the MySQL - Delete Snap to Delete condition (deletes all records from a table if left blank) to indicate that all entries will be deleted from the table when this field is blank, but no truncate operation is performed.
February 2024	436patches25659	27 Mar 2024	Latest	Fixed an issue with the MySQL- Multi Execute Snap that committed the changes when the Snap was expected to roll back if any query failed and the Number of Retries was more than 0. The Snap now performs a rollback when one or more queries fail. Fixed an issue with the MySQL-Insert Snap that displayed an error when you inserted values such as 128 or more in the Tinyint unsigned datatype when the datatype must accept all the values in the range of 0-255. Fixed an issue with MySQL-Insert Snap that failed to store the `Time` datatype with precision in the target table when passed from an upstream Mapper Snap in the `string` format or `Date-only` date format.
February 2024	main25112	14 Feb 2024	Stable	Updated and certified against the current SnapLogic Platform release.
November 2023	main23721	08 Nov 2023	Stable	Updated and certified against the current SnapLogic Platform release.
August 2023	main22460	16 Aug 2023	Stable	The MySQL - 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	10 May 2023	Stable	Upgraded with the latest SnapLogic Platform release.
February 2023	432patches19870	23 Feb 2023	Latest	Fixed an issue with the preview data of the MySQL-Execute Snap that displayed the date format as `%m %d %Y` (without the forward slash '/'). The Snap now displays the date as intended in `%m/%d/%Y` format after validation.
February 2023	main19844	09 Feb 2023	Stable	Upgraded with the latest SnapLogic Platform release.
November 2022	431patches19263	19 Dec 2022	Latest	The MySQL Insert Snap no longer includes the Preserve case-sensitivity checkbox because the database is case-insensitive. The database stores the data regardless of whether the columns in the target table and the input data are in mixed, lower, or upper case.
November 2022	main18944	10 Nov 2022	Stable	The MySQL - 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.
September 2022	430patches17894	15 Sep 2022	Latest	The MySQL Select Snap now work as expected when the table name is dependent on an upstream input;
August 2022	430patches17387	17 Aug 2022	Latest	The following issues are fixed in the MySQL Bulk Load Snap: Writing the first batch of records to a temporary file after the Snap fails. Now the Snap writes to the error view as is the expected behavior. Temporary files generation when a record does not contain a table column. Now, the Snaplex removes the temporary files created along with the directory after the Pipeline execution.
August 2022	main17386	11 Aug 2022	Stable	Upgraded with the latest SnapLogic Platform release.
4.29	main15993	14 May 2022	Stable	Upgraded with the latest SnapLogic Platform release.
4.28 Patch	428patches15101	12 Apr 2022	Latest	Fixed an issue with SQL Server - Execute Snap where the Pipeline was failing when there were consecutive execute Snaps with a procedure call, followed by select statements.
4.28	main14627	12 Feb 2022	Stable	Updated the label for Delete Condition to Delete Condition (Truncates Table if empty) in the MySQL Delete Snap.
4.27	main12833	13 Nov 2021	Stable	Enhanced the MySQL Database Account to skip batch execution, when the Batch size value is one. When the Batch size is greater than one, the batch is executed. Enhanced the MySQL - Execute Snap to invoke stored procedures.
4.26	main11181	14 Aug 2021	Stable	Upgraded with the latest SnapLogic Platform release.
4.25	425patches11008	04 Aug 2021	Latest	Enhanced the MySQL - Lookup Snap suggestions to load the Output Fields and Lookup Column settings. Fixed an issue with MySQL - Select Snap where the second output view of the Snap was showing empty column values and improved the error messages in the Snap where the Snap fails with Null Pointer Exception when the account reference provided is invalid.
4.25	main9554	08 May 2021	Stable	Upgraded with the latest SnapLogic Platform release.
4.24	main8556	13 Feb 2021	Stable	Enhances the MySQL - Select Snap to return only the fields (provided in the Output Fields) in the output schema (second output view), through a new check box Fetch Output Fields In Schema. If the Output Fields property is empty all the columns are visible. Enhances the MySQL - Stored Procedure to accept parameters from input documents by column keys. If the values are empty, the parameters are populated based on the column keys for easier mapping in the upstream Mapper Snap.
4.23 Patch	423patches7732	14 Dec 2020	Latest	Fixes an issue in the MySQL - Bulk Load Snap to support the following versions: MySQL 8.0.17 MySQL 5.6.34
4.23	main7430	14 Nov 2020	Stable	Upgraded with the latest SnapLogic Platform release.
4.22 Patch	422patches6629	01 Sep 2020	Latest	Fixes the MySQL Snap Pack by acknowledging the lineage information of the original document in an empty output view when Pass Through is enabled.
4.22	main6403	12 Sep 2020	Stable	Upgraded with the latest SnapLogic Platform release.
4.21 Patch	421patches6272	27 Jul 2020	Latest	Fixes 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	20 Jul 2020	Latest	Fixes 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	mysql8842	20 May 2020	Latest	Fixes the SSH tunneling issue by ensuring connectivity between JCC and MySQL server. Updates the UI for MySQL Accounts to simplify the SSH tunneling configuration as described in Configuring MySQL Accounts.
4.21 Patch	MULTIPLE8841	20 May 2020	Latest	Fixes the connection issue in Database Snaps by detecting and closing open connections after the Snap execution ends.
4.21	snapsmrc542	09 May 2020	Stable	Upgraded with the latest SnapLogic Platform release.
4.20 Patch	db/mysql8815	22 Apr 2020	Latest	Fixes the MySQL Stored Procedure Snap to resolve compatibility issues with the Amazon Aurora database.
4.20 Patch	db/mysql8786	30 Mar 2020	Latest	Fixes the MySQL - Bulk Load Snap to use the UTF-8 character set for writing temporary files in order to successfully handle special characters, irrespective of the value specified in the Character set field in the Snap settings.
4.20	snapsmrc535	08 Feb 2020	Stable	Upgraded with the latest SnapLogic Platform release.
4.19 Patch	db/mysql8638	21 Jan 2020	Latest	Fixes the MySQL Database Account where the associated Snaps produce a huge count of open file descriptors when the Configure SSH Tunnel property is enabled.
4.19 Patch	db/mysql8635	21 Jan 2020	Latest	Fixes the MySQL - Execute Snap where the retry option fails to establish a connection with the MySQL database, after an interrupted transmission.
4.19 Patch	db/mysql8407	13 Dec 2019	Latest	Fixes an issue with the MySQL - 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 '?'.
4.19 Patch	db/mysql8390	13 Dec 2020	Latest	Fixes an issue wherein the MySQL Snaps are unable to reconnect to the MySQL database after the breakdown of a connection.
4.19 Patch	db/mysql8340	03 Dec 2019	Latest	Fixes an issue with the MySQL Bulk Load Snap wherein the Snap is unable to execute the bulk load feature with MySQL 8.0 and higher versions.
4.19	snaprsmrc528	14 Nov 2019	Stable	Upgraded with the latest SnapLogic Platform release.
4.18 Patch	db/mysql7846	23 Sep 2019	Latest	Fixed an issue with the MySQL Snaps wherein the Snaps exhibit degraded performance with snapsmrc523.
4.18	snapsmrc523	10 Aug 2019	Stable	Reverted a 4.17-patch (db/mysql7395) update regarding how BIT and BOOLEAN column data type values are displayed. They now display as true or false (4.17GA behavior in snapsmrc515) rather than converting to 0 or 1 values (4.17-patch behavior).
4.17 Patch	db/mysql7395	10 Jun 2019	Latest	Fixed an issue wherein bit data types in the MySQL - Select table convert to true or false instead of 0 or 1.
4.17 Patch	db/mysql7357	03 Jun 2019	Latest	Fixed an issue with the MySQL Execute snap wherein the Retry property for connection fails after the database connection is severed.
4.17	ALL7402	11 Jun 2019	Latest	Pushed automatic rebuild of the latest version of each Snap Pack to SnapLogic UAT and Elastic servers.
4.17	snapsmrc515	11 Jun 2019	Latest	Fixed an issue with the MySQL 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.
4.16 Patch	MULTIPLE7123	22 Feb 2019	Latest	Added two new properties, Number of retries and Retry interval, to Delete, Insert, Select, Execute, Merge, Update, and MutliExecute Snaps that enables you to handle retry attempts during a connection failure.
4.16 Patch	db/mysql6823	22 Feb 2019	Latest	Fixed an issue with the Lookup Snap passing data simultaneously to output and error views when some values contained spaces at the end.
4.16	snapsmrc508	16 Feb 2019	Stable	Upgraded with the latest SnapLogic Platform release.
4.15 Patch	MULTIPLE6413	02 Jan 2019	Latest	Added 2 new properties, JDBC Driver Class and JDBC JARs. The new properties enable uploading JDBC JARs that help connect to MYSQL8.
4.15 Patch	db/mysql6332	05 Dec 2018	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.
4.15	snapsmrc500	15 Dec 2018	Stable	Upgraded with the latest SnapLogic Platform release.
4.14	snapsmrc490	11 Aug 2018	Stable	Upgraded with the latest SnapLogic Platform release.
4.13	snapsmrc486	12 May 2018	Stable	Upgraded with the latest SnapLogic Platform release.
4.12 Patch	db/mysql4924	03 Apr 2018	Latest	Fixed the MySQL Bulk Load Snap so that it doesn't produce an output document if there are no input documents.
4.12	snapsmrc480	17 Feb 2018	Stable	Upgraded with the latest SnapLogic Platform release.
4.11	snapsmrc465	11 Nov 2017	Stable	New! MySQL Stored Procedure Snap added to call/execute MySQL Stored Procedure. SSH Tunnelling related properties added at the Account level for both MySQL Dynamic Account and MySQL Database Account.
4.10 Patch	mysql3988	21 Sep 2017	Latest	SSH Tunnelling related properties added at the Account level for both MySQL Dynamic Account and MySQL Database Account.
4.10	snapsmrc414	12 Aug 2017	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	mysql3070	01 Jun 2017	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
4.9	snapsmrc405	13 May 2017	Stable	Upgraded with the latest SnapLogic Platform release.
4.8.0 Patch	mysql2755	27 Mar 2017	Latest	Potential fix for JDBC deadlock issue.
4.8.0 Patch	mysql2695	22 Feb 2017	Latest	Addresses an issue where some changes made in the platform patch MRC294 to improve perfomance caused Snaps in the listed Snap Packs to fail.
4.8	snapsmrc398	11 Feb 2017	Stable	Info tab added to accounts. Database accounts now invalidate connection pools if account properties are modified and login attempts fail.
4.7.0 Patch	mysql2189	28 Nov 2016	Latest	Fixed an issue for database Select Snaps regarding Limit rows not supporting an empty string from a pipeline parameter.
4.7.0 Patch	mysql2280	13 Dec 2016	Latest	MySQL Merge will now route documents to the output and error views correctly
4.7	snapsmrc382	23 Nov 2016	Stable	Added a new Snap, MySQL Bulk Load.
4.6	snapsmrc362	13 Aug 2016	Stable	Enhanced MySQL Execute Snap to fully support SQL statements with/without expressions & SQL bind variables. Extended support for MySQL Dynamic accounts. Resolved an issue in MySQL Select Snap that caused failures in the second output view when retrieving outputs from a table with a dot (.) character. Resolved an issue in MySQL Execute Snap that caused failures when passing expression ($variable_name) for stored procedures. Resolved an issue in MySQL Execute Snap that caused failures when an SQL statement had an inline comment. Resolved an issue in MySQL Execute Snap that ignored all statements after "–".
4.5.1	snapsmrc344	18 May 2016	Stable	Fixed an error in a tooltip for MySQL - Select Snap.
4.5	snapsmrc344	18 May 2016	Latest	Resolved an issue in MySQL Insert Snap to ensure an error is reported when table column is set to NOT NULL.
4.4.1	NA	18 Mar 2016	Stable	Upgraded with the latest SnapLogic Platform release.
4.4	NA	13 Feb 2016	Stable	Upgraded with the latest SnapLogic Platform release.
4.3.2	NA	15 Jan 2016	Stable	NEW! MySQL Lookup Snap Improved performance of the MySQL Execute Snap.
4.3	NA	NA	Stable	Table List Snap: A new option, Compute table graph, now lets you determine whether or not to generate dependents data into the output.
4.2.2	NA	NA	Stable	Ignore empty result added to Execute and Select Snaps. The option will not write any document to the output view for select statements producing no results. Resolved a Java exception in MySQL Merge Snap.