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Snap type: Read

Description:

This Snap allows you to fetch data from a database by providing a table name and configuring the connection. The Snap produces the records from the database on its output view, which can then be processed by a downstream Snap.

JSON paths can be used in a query and will have values from an incoming document substituted into the query. However, documents missing values for a given JSON path will be written to the Snap's error view. After a query is executed, the query's results are merged into the incoming document overwriting any existing keys' values. The original document is output if there are no results from the query.

Queries produced by the Snap have an equivalent format:

SELECT * FROM [table] WHERE [where clause] ORDER BY [ordering] LIMIT [limit] OFFSET [offset]

If more powerful functionality is desired, then the SAP HANA Execute Snap should be used.

Expected upstream Snaps: A dynamic where clause can be defined by providing values upstream. Such as the Mapper Snap can provide constants, pipeline parameters mapped into variables which then can be used in the where clause or even in the table/schema properties.

Expected downstream Snaps: The Snap will output one document for every record retrieved, hence any document processing Snap can be used downstream.

Expected input: Document that provides values for one or more properties of the Snap or simply for pass through purpose.

Expected output: Document for each record retrieved. Special types such as TIMESTAMP, TIME are converted into SnapLogic internal date type representations which then can be consumed by downstream Snaps just like any other data type.

Important: The where clause can only use variables, no constants or pipeline parameters.

Important

The where clause can only use variables, no constants or pipeline parameters.

A good example for a where clause is: SALARY =$SALARY (here we use the SALARY variable of the input document).
A bad example for a where clause is: SALARY = _param (this will not work since we do not evaluate pipeline parameters during prepared statement execution, instead an upstream Mapper needs to be used that maps _param into $SALARY).

Prerequisites:

Support and limitations: Works in Ultra Tasks.

Account:

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

Views:

Input	This Snap has exactly one document input view.
Output	This Snap has exactly one document output view.
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 suggest-able and will retrieve available database schemas during suggest values.

Example: myschema

Default value: [None]

Table name

Required. The name of the table to execute a select query on.

Example: people

Default value: [None]

Where clause

Where clause of select statement. This supports document value substitution (such as $person.firstname will be substituted with the value found in the incoming document at the path).

Example: email = 'kalmeida@example.com' or email = $email

Default value: [None]

Order by

Enter in the columns in order to order by. The default database sort order will be used.

Example:

name

Default value: [None]

Limit offset

Starting row for the query.

Example: 0

Default value: [None]

Limit rows

Number of rows to return from the query.

Example: 10

Default value: [None]

Output fields

Enter or select output field names for SQL SELECT statement. To select all fields, leave it at default.

Example: email, address, first, last, etc.

Default value: [None]

Fetch Output Fields In Schema

Select this check box to include only the selected fields or columns in the Output Schema (second output view). If you do not provide any Output fields, all the columns are visible in the output.
If you provide output fields, we recommend you to select Fetch Output Fields In Schema check box.

Default value: Not selected

Pass through

If checked, the input document will be passed through to the output view under the key 'original'.

Default value: Selected

Ignore empty result If checked, no document will be written to the output view when the SELECT operation does not produces any result. If this property is unchecked and the Pass through property is checked, the input document will be passed through to the output view.

Auto commit

Select one of the options for this property to override the state of the Auto commit property on the account. The Auto commit at the Snap-level has three values: True, False, and Use account setting. The expected functionality for these modes are:

True - The Snap will execute with auto-commit enabled regardless of the value set for Auto commit in the Account used by the Snap.
False - The Snap will execute with auto-commit disabled regardless of the value set for Auto commit in the Account used by the Snap.
Use account setting - The Snap will execute with Auto commit property value inherited by the Account used by the Snap.

Default value: False

Match data types

Conditional. This property applies only when the Output fields property is provided with any field value(s).

If this property is selected, the Snap tries to match the output data types same as when the Output fields property is empty (SELECT * FROM ...). The output preview would be in the same format as the one when SELECT * FROM is implied and all the contents of the table are displayed.

Default value: Not selected

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.

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.

Example: 3

Default value: 0

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

Staging mode

Required when the value in the Number of retries field is greater than 0.

Specify the location from the following options to store input documents between retries:

In memory: The query results are stored in the Snaplex memory. If the query is too large to fit in the memory space, it may cause the Snap to fail, choose the On disk option.
On disk: The query results are stored on the disk in a temporary (tmp) directory that is managed by the SnapLogic platform. This directory is deleted automatically when the Snap terminates.

Snap Execution

Select one of the following three modes in which the Snap executes:

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.

Default Value: Execute only
Example: Validate & Execute

Examples

In this example, we show how to retrieve data from a table called "USER".

We can pass the dynamic variable used in where clause from upstream Snap like JSON Generator. We try to retrieve employees by their age.

The sample output looks like:

Snap Pack History

Click to view/expand

Release	Snap Pack Version	Date	Type	Updates
February 2025	main29887	12 Feb 2025	Stable	Updated and certified against the current SnapLogic Platform release.
November 2024	main29029	13 Nov 2024	Stable	Updated and certified against the current SnapLogic Platform release.
August 2024	main27765	21 Aug 2024	Stable	Updated and certified against the current Snaplogic Platform release.
May 2024	437patches26690	10 Jun 2024	Latest	Fixed an issue in the SAP HANA Snap Pack where the downstream Snaps did not support the data type appropriately.
May 2024	main26341	08 May 2024	Stable	Updated the Delete Condition (Truncates a Table if empty) field in the SAP HANA - 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	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 SAP HANA - 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	main19844	09 Feb 2023	Stable	Upgraded with the latest SnapLogic Platform release.
November 2022	main18944	10 Nov 2022	Stable	The SAP HANA 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.
October 2022	430patches18852	31 Oct 2022	Latest	SAP HANA Snaps now properly handle lineage when used in Ultra Pipelines.
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	main14627	12 Feb 2022	Stable	Updated the label for Delete Condition to Delete Condition (Truncates Table if empty) in the SAP HANA Delete Snap
4.27	main12833	13 Nov 2021	Stable	Enhanced the SAP HANA - Execute Snap to invoke stored procedures.
4.26	main11181	14 Aug 2021	Stable	Upgraded with the latest SnapLogic Platform release.
4.25	main9554	08 May 2021	Stable	Upgraded with the latest SnapLogic Platform release.
4.24	main8556	13 Feb 2021	Stable	Enhanced the SAP HANA - 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. Enhanced the SAP HANA - 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	423patches7548	23 Nov 2020	Latest	Fixed the batch size issue in SAP HANA - Upsert Snap by using a prepare statement when sending the batch request.
4.23	main7430	14 Nov 2020	Stable	Upgraded with the latest SnapLogic Platform release.
4.22 Patch	422patches6940	07 Oct 2020	Latest	Fixed the stored procedure name conflict issue in the SAP HANA - Stored Procedure Snap, when the stored procedure exists in multiple schemas, by parsing each procedure name.
4.22	main6403	12 Sep 2020	Stable	Upgraded with the latest SnapLogic Platform release.
4.21 Patch	421patches6272	27 Jul 2020	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	20 Jul 2020	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	snapsmrc542	09 May 2020	Stable	Upgraded with the latest SnapLogic Platform release.
4.20	snapsmrc535	08 Feb 2020	Stable	Reverted the SAP/HANA Snap Pack to the stable version snapsmrc535.
4.19 Patch	db/saphana8411	13 Dec 2019	Latest	Fixed an issue with the SAP HANA - 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	snaprsmrc528	14 Nov 2019	Stable	Upgraded with the latest SnapLogic Platform release.
4.18	snapsmrc523	10 Aug 2019	Stable	Upgraded with the latest SnapLogic Platform release.
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 SAP HANA 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	db/saphana7062	01 Apr 2019	Latest	Fixed an issue in SAP HANA Update and Insert Snaps wherein time data type was not getting passed if a table name and column name were similar in multiple schemas.
4.16 Patch	db/saphana7040	05 Apr 2019	Latest	Fixed an issue with the SAP HANA - Delete Snap wherein the Snap was unable to delete a data if the delete condition was not selected or if the condition was a static value.
4.16	snapsmrc508	16 Feb 2019	Stable	Upgraded with the latest SnapLogic Platform release.
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	snapsmrc480	17 Feb 2018	Stable	Upgraded with the latest SnapLogic Platform release.
4.11	snapsmrc465	11 Nov 2017	Stable	Upgraded with the latest SnapLogic Platform release.
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	saphana3074	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	saphana2759	27 Mar 2017	Latest	Potential fix for JDBC deadlock issue.
4.8.0 Patch	saphana2714	01 Mar 2017	Latest	Fixed SAP HANA Snap Pack rendering dates that are one hour off from the date returned by database query for non-UTC Snaplexes.
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	saphana2202	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	snapsmrc382	23 Nov 2016	Stable	Upgraded with the latest SnapLogic Platform release.
4.6	snapsmrc362	13 Aug 2016	Stable	Upgraded with the latest SnapLogic Platform release.
4.5.1	snapsmrc344	18 May 2016	Latest	Fixed an error in a tooltip for SAP HANA Upsert.
4.5	snapsmrc344	18 May 2016	Stable	NEW! SAP HANA - Table List: This Snap outputs a list of tables in a database. Output fields property added to SAP HANA Select Snap. Resolved an issue in SAP HANA Write Snap to disallow insertion of unsupported data types as NULLs in HANA tables. Resolved an issue in SAP HANA Execute Snap that occurred when errors were reported even when table creation was successful.
4.22	NA	NA	NA	Ignored empty result added to Execute and Select Snaps. The option will not any document to the output view for select statements.
NA	NA	07 Jun 2015	NA	Addressed the following issues: Mismatched datatype values are inserted as NULLs JSON paths in WHERE clauses should be processed as bind values after the expression is evaluated.
NA	NA	06 Jun 2015	NA	Addressed the following issue: When schema name entered in lower case- click on suggest for table name- says - no tables found Dynamic DB queries now supported in the Execute Snap. The SQL statement property now can be set as an expression property. When it is an expression, it will be evaluated with each input document and one SQL statement per each input document will be executed. Known issue: When the SQL statement property is an expression, the pipeline parameters are shown in the suggest, but not the input schema. With the SQL statement property set as an expression, the Snap can be exposed to SQL injection. Please use this feature with caution. SAP Hana Insert string into number no longer routes to error view - just inserts null
NA	NA	02 May 2015	NA	SAP HANA Stored Procedure Insert: Issue resolved with failing to write a string "NaN" to a string datatype column in HANA. Select: Issue resolved with invalid table name.

Settings

Examples

snapsmrc486

snapsmrc480

snapsmrc414

snapsmrc398

snapsmrc382

snapsmrc344

snapsmrc344