Snowflake - Lookup

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Overview

Snap type:

Read


Description:

This Snap looks up records in the target Snowflake SQL Server table and returns a selected set of fields for every matched record. The Snap executes one request per multiple input documents to avoid making a request for every input record.
The Snap ignores any duplicated lookup condition in the input document stream since it maintains a cache for lookup conditions internally.


Queries produced by the Snap have the format:

SELECT [Output fields] FROM [Table name] WHERE
[C1 = V11 AND C2 = V21 AND...[Cn = Vn1] OR
[C1 = V12 AND C2 = V22 AND...[Cn = Vn2] OR 
......................................  OR
[Cn = V1n AND Cm = V2m AND...[Cn = Vnm]


The Snap ignores any duplicated lookup condition in the input document stream since it maintains a cache for lookup conditions internally. 


Expected upstream Snaps:  Any Snap which produces documents in the output view, such as CSV Parser, JSON Parser, Structure, and Mapper.
 
Expected downstream Snaps:  Any Snap which receives documents in the input view, such as JSON Formatter, Structure, and Mapper. The CSV Formatter will cause an error since the output data is not a flattened Map data.
 

Prerequisites:

You should have minimum permissions on the database to execute Snowflake Snaps. To understand if you already have them, you must retrieve the current set of permissions. The following commands enable you to retrieve those permissions.

SHOW GRANTS ON DATABASE <database_name>
 
SHOW GRANTS ON SCHEMA <schema_name>
 
SHOW GRANTS TO USER <user_name>

Security Prerequisites: You should have the following permissions in your Snowflake account to execute this Snap: 

  • Usage (DB and Schema): Privilege to use database, role, and schema.

The following commands enable minimum privileges in the Snowflake Console:

grant usage on database <database_name> to role <role_name>;
grant usage on schema <database_name>.<schema_name>;


For more information on Snowflake privileges, refer to Access Control Privileges.
Internal SQL Commands

This Snap uses the LOOKUP command internally. It queries the database and retrieves a set of rows or defines the set of columns returned by a query.

Support and limitations:Works in Ultra Task Pipelines.
Account: 

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


Views:
InputThis Snap allows exactly one input view and expects documents in the view. 
OutputThis Snap has at most one document output view.
Error

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


Settings

Label*


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*



Specify the database schema name. In case it is not defined, then the suggestion for the Table Name will retrieve all table 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.

Default value:  [None]


Table name*

Enter or select the name of the Snowflake SQL table to execute the lookup query.

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

Default value: [None]
 

Output fields*

Enter or select output field names for the Snowflake SQL SELECT statement.

Default: [None]
 

Lookup conditions*


Enter or select the lookup column name.


Value*

Enter or select the JSON path of the lookup column value. The value will be provided by the input data field. 


Lookup column name*


Specify the lookup conditions are created by using the lookup column name and the lookup column value. Each row will build a condition, such aslookupColumn1 = $inputField. Each additional row will be concatenated using a logical AND. All rows together build the lookup condition being used to look up records in the lookup table.


Pass-through on no lookup match


When there is no lookup matching an input document, the input document will pass through to the output view if this property is checked. Otherwise, it will be written to the error view as an error condition.

Default value:  Not Selected

Number of Retries

Specify the maximum number of retry attempts when the Snap fails to read.

Minimum value: 0

Default value: 0
Example: 3

Retry Interval (seconds)

Specifies the minimum number of seconds the Snap must wait before each retry attempt.

Minimum value: 1

Default value: 1
Example: 3

Input Date Format
The property has the following two options:
  • Select Continue to execute the snap with the given input Date format if you want the Snap to continue with the current date format. This option is selected by default. 
  • Select Auto Convert the format to Snowflake default format if you want the Snap to convert the provided date format to the default Snowflake date format. To know about the date formats supported by Snowflake, see Snowflake date formats
Handle Timestamp and Date Time Data

Specify how the Snap must handle timestamp and date-time data. The available options are:

  • Default Date Time format in UTC Time Zone: The Snowflake date time data are represented in UTC Time Zone.

  • SnapLogic Date Time format in Regional Time Zone: The Snowflake date time data are represented in the same regional time zone value, as provided in the Snowflake account.

Default value: Default Date Time format in UTC Time Zone

Recommendation:

If you use the Timestamp TZ and Timestamp LTZ in this Snap, we recommend you to use SnapLogic Date Time format in Regional TimeZone to ensure that you get the Timestamp data output of the target table in the same format as in the source table.

Source Table

Target Table

Manage Queue Queries

Select this checkbox to determine whether the Snap should continue or cancel the execution of the queued Snowflake Execute SQL queries when you stop the Pipeline.

If you select Cancel queued queries when the pipeline is stopped or if it fails, then the read queries under execution are canceled, whereas the write queries under execution are not canceled. Snowflake internally determines which queries are safe to be canceled and cancels those queries.

Default value: Continue to execute queued queries when pipeline is stopped or if it fails

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


The following example shows how a Snowflake object record can be looked up using the Snowflake Lookup Snap and record the data using the Snowflake Execute Snap. In this pipeline, the Snowflake Execute Snap writes the data from the Snowflake table ADOBEDATA123 to the target Snowflake table, ADOBEDATA using the Snowflake Lookup Snap. 

  

1. The Execute Snap runs the select query to retrieve the data from the table ADOBEDATA123

2. The Snowflake Lookup Snap runs the lookup query on, and the lookup conditions specify the column names to be looked up in the look-up table ADOBEDATA123. 

Additionally, in the Output fields, select the names of the specific output field name(s) for the output preview to contain only those fields("ACCOUNT_C", "ADOBE_ROLE_C", "ID")  to be recorded on the target table, ADOBEDATA.


Successful execution of the Snap gives the following preview:

Note that the output preview has only those column names that were specified in the output fields. The column, original, displays all the column names present in the original table (ADOBEDATA123) as displayed below:

 

Snap Pack History

 Click to view/expand
Release Snap Pack VersionDateType  Updates
4.27427patches12999 LatestEnhanced the Snowflake SCD2 Snap to support Pipeline parameters for Natural key and Cause-historization fields.
4.27main12833 Stable
  • Enhanced the Snowflake S3 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.
  • Added the following truncate options to Snowflake - Bulk Load Snap to truncate existing data before performing data load to more efficiently transfer data where possible.
    • Truncate data: Truncates existing data before performing data load. 
    • Truncate columns: Truncates column values that are larger than the maximum column length in the table.
  • Enhanced the Snowflake - Execute Snap to invoke stored procedures.
4.26 Patch426patches11469 LatestFixed an issue with Snowflake Insert and Snowflake Bulk Load Snaps where the schema names or database names containing underscore (_) caused the time out of Pipelines.
4.26main11181 Stable
  • Enhanced Snowflake - Lookup and Snowflake SCD2 Snaps with the Input Date Format field to select from the following two options:
    • Continue to execute the snap with the given input Date format
    • Auto Convert the format to Snowflake default format
  • Added a new account type Snowflake Google Storage Database to connect to Google Cloud Storage to load data.
  • Added support for all existing Snowflake Snap accounts to connect to a Snowflake instance hosted on the Google Cloud Platform

4.25425patches10190LatestEnhanced the Snowflake S3 Database and Snowflake S3 Dynamic accounts with a new field S3 AWS Token that allows you to connect to private and protected Amazon S3 buckets.
4.25main9554
 
StableUpgraded with the latest SnapLogic Platform release.

4.24 Patch

424patches8905 LatestEnhanced the Snowflake - Bulk Load Snap to allow transforming data using a new field Select Query before loading data into the Snowflake database. This option enables you to query the staged data files by either reordering the columns or loading a subset of table data from a staged file. This Snap supports CSV and JSON file formats for this data transformation.
4.24main8556
Stable

Enhanced the Snowflake - 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.

4.23 Patch

423patches7905 Latest

Fixed the performance issue in the Snowflake - Bulk Load Snap while using External Staging on Amazon S3.

4.23main7430
 
Stable
4.22 Patch 422patches7246 Latest

Fixes an issue with the Snowflake Snaps that fail while displaying the same error message, javax.management.MalformedObjectNameException: Invalid character '=' in value part of property, repeatedly when there is “=“ or ”:” in the Snowflake URL connection.

4.22 Patch

422patches6849 Latest
4.22main6403
 
StableUpgraded with the latest SnapLogic Platform release.

4.21 Patch

421patches6272 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 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.
  • Fixed the exception RefCnt has gone negative across the Snaps in Snowflake Snap Pack.

4.21 Patch 

db/snowflake8860 Latest

Added a new field, Handle Timestamp and Date Time Data, to Snowflake Lookup Snap. This field enables you to decide whether the Snap should translate UTC time to your local time and the format of the Date Time data.

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.
4.20 Patch db/snowflake8800 Latest
  • Certifies the Snowflake Snap Pack against JDBC Driver version 3.12.3.

Snowflake Execute and Multi-Execute Snaps may break existing Pipelines if the JDBC Driver is updated to a newer version.

With the updated JDBC driver (version 3.12.3), the Snowflake Execute and Multi-Execute Snaps' output displays a Status of "-1" instead of "0" without the Message field upon successfully executing DDL statements. If your Pipelines use these Snaps and downstream Snaps use the Status field's value from these, you must modify the downstream Snaps to proceed on a status value of -1 instead of 0.

This change in the Snap behavior follows from the change introduced in the Snowflake JDBC driver in version 3.8.1:
"Statement.getUpdateCount() and PreparedStatement.getUpdateCount() return the number of rows updated by DML statements. For all other types of statements, including queries, they return -1."

4.20 Patch db/snowflake8758 Latest

Re-release of fixes from db/snowflake8687 for 4.20: Fixes the Snowflake Bulk Load snap where the Snap fails to load documents containing single quotes when the Load empty strings checkbox is not selected.

4.20snapsmrc535
 
StableUpgraded with the latest SnapLogic Platform release.
4.19 Patch db/snowflake8687 Latest

Fixed the Snowflake Bulk Load snap where the Snap fails to load documents containing single quotes when the Load empty strings checkbox is not selected.

4.19 Patch 

db/snowflake8499 Latest

Added the property Handle Timestamp and Date Time Data to Snowflake - Execute and Snowflake - Select Snaps. This property enables you to decide whether the Snap should translate UTC time to your local time.

4.19 Patch 

db/snowflake8412 Latest

Fixed an issue with the Snowflake - 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
 
Stable
  • Added a new field-set, Auto Historization Query, in the Snowflake SCD2 Snap to support auto-historization of column data. With this enhancement you can detect whether the incoming record is a historical event or a current event.  
  • Raised the minimum buffer size in the Snowflake - Bulk Upsert and Snowflake - Bulk Load Snaps to 6 MB.
4.18 Patch db/snowflake8044 Latest

Fixed an issue with the Snowflake - Select Snap wherein the Snap converts the Snowflake-provided timestamp value to the local timezone of the account.

4.18 Patch 

db/snowflake8044 Latest

Enhanced the Snap Pack to support AWS SDK 1.11.634 to fix the NullPointerException issue in the AWS SDK. This issue occurred in AWS-related Snaps that had HTTP or HTTPS proxy configured without a username and/or password. 

4.18 Patch

MULTIPLE7884 Latest

Fixed an issue with the PostgreSQL grammar to better handle the single quote characters.

4.18 Patch 

db/snowflake7821 Latest

Fixed an issue with the Snowflake - Execute Snap wherein the Snap is unable to support the '$' character in query syntax.

4.18 Patch

MULTIPLE7778 Latest

Updated the AWS SDK library version to default to Signature Version 4 Signing process for API requests across all regions.

4.18 Patch 

db/snowflake7739 Latest
  • Fixed an issue with the Snowflake - Bulk Upsert Snap wherein the Snap fails when using a pipeline parameter in Key columns.
  • Fixed an issue with the Snowflake - Unload Snap wherein the Snap does not abort the query when you stop the Pipeline execution.
4.18snapsmrc523
 
Stable

Added the Use Result Query property to the Multi Execute Snap, which enables you to write results to an output view.

4.17ALL7402
 
Latest

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

4.17 Patch 

db/snowflake7396 Latest

Fixed an issue wherein bit data types in the Snowflake - Select table convert to true or false instead of 0 or 1.

4.17 Patch 

db/snowflake7334 Latest

Added AWS Server-Side Encryption support for AWS S3 and AWS KMS (Key Management Service) for Snowflake Bulk Load, Snowflake Bulk Upsert, and Snowflake Unload Snaps.

4.17snapsmrc515
 
Latest
  • Fixed an issue with the Snowflake 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/snowflake6945 Latest

Fixed an issue with the Snowflake Lookup Snap failing when Date datatype is used in JavaScript functions.

4.16 Patch 

db/snowflake6928 Latest

Added support for file format options for input data from upstream Snaps, to the Snowflake Bulk Load Snap.

4.16 Patch 

db/snowflake6819 Latest
  • Snowflake Bulk Load: Added new property, Buffer size (MB). Configure this to specify the size limit of each buffer when writing to external staging systems such as S3. 
  • Fixed an issue with the Lookup Snap passing data simultaneously to output and error views when some values contained spaces at the end.
4.16snapsmrc508
 
Stable
  • Snowflake Account: Added the ability to use SnapLogic to securely connect to and query a Snowflake instance using Azure Blob as its storage layer. 
  • Snowflake Account: Added support for Snowflake JDBC JAR version 3.6.17. 
  • Snowflake Unload, Bulk Load, and Bulk Upsert: Updated the Snaps to enable SnapLogic users to successfully connect to a Snowflake instance to query, bulk load, and unload data from Azure Blob storage.
4.15snapsmrc500
 
Stable
  • Added two new Snaps, Snowflake - Multi Execute, and Snowflake SCD2. Snowflake - Multi Execute is used for executing multiple DDL and DML queries on the Snowflake DB. Snowflake SCD2 is used for Type 2 field historization. 
  • Enhanced the Snowflake Bulk Upsert Snaps to improve the Snaps performance.
  • Enhanced the Snowflake Snap Pack to reflect Azure certification.
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.
4.11 PatchMULTIPLE4377 Latest

Fixed a document call issue that was slowing down the Snowflake Bulk Load Snap.

4.11 Patch 

db/snowflake4283 Latest

Snowflake Bulk Load - Fixed an issue by adding PUT command to the list of DDL command list for Snowflake.

4.11 Patch 

db/snowflake4273 Latest

Snowflake Bulk Load - Resolved an issue with Snowflake Bulk Load Delimiter Consistency (comma and newline).

4.11snapsmrc465
 
StableUpgraded with the latest SnapLogic Platform release.

4.10 Patch

snowflake4133
Latest

Updated the Snowflake Bulk Load Snap with Preserve case sensitivity property to preserve the case sensitivity of column names.

4.10

snapsmrc414

 
Stable
  • Updated the Snowflake Bulk Load Snap with Load empty strings property for the empty string values in the input documents to be loaded as empty strings to the string-type fields.
  • Updated the Snowflake Bulk Load Snap with Table Columns to support the order of the entries on the staged files that contain a subset of the columns in the Snowflake table.
  • Added the property Use Result Query to view the output preview field with a result statement.
  • Tested for the JDBC jar version 3.1.1 on the Database and the Dynamic accounts.

4.9.0 Patch

snowflake3234 Latest

Enhanced Snowflake - Execute Snap results to include additional details

4.9.0 Patch

snowflake3125 Latest

Addressed an issue in Snowflake Bulk Load where the comma character in a value is not escaped.

4.9snapsmrc405
 
StableJDBC Driver Class property added to enable the user to custom configure the JDBC driver in the Database and the Dynamic accounts.

4.8.0 Patch

snowflake2760 Latest

Potential fix for JDBC deadlock issue.

4.8.0 Patch

snowflake2739 Latest

Addressed an issue with the Snowflake schema not correctly represented in the Mapper Snap.

4.8

snapsmrc398

 
Stable
  • Info tab added to accounts.
  • Database accounts now invalidate connection pools if account properties are modified and login attempts fail.
  • Enhanced the default count of input and output view (UI) behavior of the Snaps for better user experience. 

    Snowflake Snap Pack

    Views

    Bulk Load

    Bulk Upsert

    Insert

    Update

    Delete

    Execute

    Unload

    Select

    Table List

    Lookup

    Initial (4.7)

    Input-Output views

    1-0

    1-0

    1-0

    1-0

    0-0

    0-0

    0-0

    0-1

    0-1

    0-1

    Current (4.8)

    Input-Output views

    1-1

    1-1

    1-1

    1-1

    0-1

    0-1

    0-1

    0-1

    0-1

    0-1

    Note that the Snowflake Select, Table List and Lookup Snap views remain unchanged.