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URL: https://www.cdata.com/kb/tech/odata-ssis-snowflake.rst

⇱ Migrating data from OData to Snowflake using CData SSIS Components.

Migrating data from OData to Snowflake using CData SSIS Components.

👁 Cameron Leblanc
Cameron Leblanc
Senior Technology Evangelist
Easily push OData services to Snowflake using the CData SSIS Tasks for OData and Snowflake.

Snowflake is a leading cloud data warehouse and a popular backbone for enterprise BI, analytics, data management, and governance initiatives. Snowflake offers features such as data sharing, real-time data processing, and secure data storage which makes it a common choice for cloud data consolidation.

The CData SSIS Components enhance SQL Server Integration Services by enabling users to easily import and export data from various sources and destinations.

In this article, we explore the data type mapping considerations when exporting to Snowflake and walk through how to migrate OData services to Snowflake using the CData SSIS Components for OData and Snowflake.

Data Type Mapping

Snowflake Schema CData Schema

NUMBER, DECIMAL, NUMERIC, INT, INTEGER, BIGINT, SMALLINT, TINYINT, BYTEINT

decimal

DOUBLE, FLOAT, FLOAT4, FLOAT8, DOUBLEPRECISION, REAL

real

VARCHAR, CHAR, STRING, TEXT, VARIANT, OBJECT, ARRAY, GEOGRAPHY

varchar

BINARY, VARBINARY

binary

BOOLEAN

bool

DATE

date

DATETIME, TIMESTAMP, TIMESTAMP_LTZ, TIMESTAMP_NTZ, TIMESTAMP_TZ

datetime

TIME

time

Special Considerations

  • Casing: Snowflake enforces an exact case match by default for identifiers, so it is common to run into issues that can be attributed to mismatched casing. Set the IgnoreCase property to True in your CData SSIS Components for Snowflake connection to resolve these issues. This property directly maps to the QUOTED_IDENTIFIERS_IGNORE_CASE property in Snowflake and specifies whether Snowflake will treat identifiers as case-sensitive.

  • Timestamps: Snowflake supports three timestamp types:

    • TIMESTAMP_NTZ: This timestamp stores UTC time with a specified precision. However, all operations are performed in the current session's time zone, controlled by the TIMEZONE session parameter.
    • TIMESTAMP_LTZ: This timestamp stores "wallclock" time with a specified precision. All operations are performed without taking any time zone into account.
    • TIMESTAMP_TZ: This timestamp stores UTC time together with an associated time zone offset. When a time zone isn't provided, the session time zone offset is used.

    By default the CData SSIS Components write timestamps to Snowflake as TIMESTAMP_NTZ unless manually configured.

About OData Data Integration

CData simplifies access and integration of live OData services data. Our customers leverage CData connectivity to:

  • Access OData versions 2.0, 3.0, and 4.0, working with legacy services and the latest features and capabilities.
  • Leverage advanced query options, including $filter, $select, and $expand, enhancing data retrieval from 3rd party tools.
  • Use Server-side execution of aggregation and grouping to minimize data transfer and boost performance.
  • Authenticate securely using a variety of schemes, including Azure AD, digest, negotiate, NTLM, OAuth, and more means secure authentication with every connection.
  • Use SQL stored procedures to manage OData service entities - listing, creating, and removing associations between entities.

Customers use CData's solutions to regularly integrate their OData services with preferred tools, such as Power BI, MicroStrategy, or Tableau, and to replicate data from OData services to their databases or data warehouses.


Getting Started


Prerequisites

Create the project and add components

  1. Open Visual Studio and create a new Integration Services Project. 👁 Create the SSIS project
  2. Add a new Data Flow Task to the Control Flow screen and open the Data Flow Task.
  3. Add a CData OData Source control and a CData Snowflake Destination control to the data flow task. 👁 Add the source and destination controls (Salesforce is shown)

Configure the OData source

Follow the steps below to specify properties required to connect to OData.

  1. Double-click the CData OData Source to open the source component editor and add a new connection. 👁 Open the source component editor (Salesforce is shown)
  2. In the CData OData Connection Manager, configure the connection properties, then test and save the connection.

    The User and Password properties, under the Authentication section, must be set to valid OData user credentials. In addition, specify a URL to a valid OData server organization root or OData services file.

    👁 Configure the source connection (Salesforce is shown)
  3. After saving the connection, select "Table or view" and select the table or view to export into Snowflake, then close the CData OData Source Editor. 👁 Select the table to export (Salesforce is shown)

Configure the Snowflake destination

With the OData Source configured, we can configure the Snowflake connection and map the columns.

  1. Double-click the CData Snowflake Destination to open the destination component editor and add a new connection. 👁 Open the destination component editor
  2. In the CData Snowflake Connection Manager, configure the connection properties, then test and save the connection.
    • The component supports Snowflake user authentication, federated authentication, and SSL client authentication. To authenticate, set User and Password, and select the authentication method in the AuthScheme property. Starting with accounts created using Snowflake’s bundle 2024_08 (October 2024), password-based authentication is no longer supported due to security concerns. Instead, use alternative authentication methods such as OAuth or Private Key authentication.

    Other helpful connection properties

    • QueryPassthrough: When this is set to True, queries are passed through directly to Snowflake.
    • ConvertDateTimetoGMT: When this is set to True, the components will convert date-time values to GMT, instead of the local time of the machine.
    • IgnoreCase: A session parameter that specifies whether Snowflake will treat identifiers as case sensitive. Default: false(case is sensitive).
    • BindingType: There are two kinds of binding types: DEFAULT and TEXT. DEFAULT uses the binding type DATE for the Date type, TIME for the Time type, and TIMESTAMP_* for the Timestamp_* type. TEST uses the binding type TEXT for Date, Time, and Timestamp_* types.
    👁 Configure the destination connection
  3. After saving the connection, select a table in the Use a Table menu and in the Action menu, select Insert. 👁 Choose the destination table
  4. On the Column Mappings tab, configure the mappings from the input columns to the destination columns. 👁 Map the columns (Salesforce is shown)

Run the project

You can now run the project. After the SSIS Task has finished executing, data from your SQL table will be exported to the chosen table.

Ready to get started?

Download a free trial of the OData SSIS Component to get started:

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Learn more:

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OData SSIS Components

Powerful SSIS Source & Destination Components that allow you to easily connect SQL Server with live OData feeds through SSIS Workflows.

Use the OData Data Flow Components to synchronize with OData Services. Perfect for data synchronization, local back-ups, workflow automation, and more!