tSnowflakeOutput Standard properties - 7.2

Snowflake

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7.2
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Talend Big Data
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Talend Studio
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Data Governance > Third-party systems > Cloud storages > Snowflake components
Data Quality and Preparation > Third-party systems > Cloud storages > Snowflake components
Design and Development > Third-party systems > Cloud storages > Snowflake components

These properties are used to configure tSnowflakeOutput running in the Standard Job framework.

The Standard tSnowflakeOutput component belongs to the Cloud family.

The component in this framework is available in all Talend products.

Note: This component is a specific version of a dynamic database connector. The properties related to database settings vary depending on your database type selection. For more information about dynamic database connectors, see pzz1550477830065.html.

Basic settings

Database

Select a type of database from the list and click Apply.

Property Type

Select the way the connection details will be set.

  • Built-In: The connection details will be set locally for this component. You need to specify the values for all related connection properties manually.

  • Repository: The connection details stored centrally in Repository > Metadata will be reused by this component. You need to click the [...] button next to it and in the pop-up Repository Content dialog box, select the connection details to be reused, and all related connection properties will be automatically filled in.

This property is not available when other connection component is selected from the Connection Component drop-down list.

Connection Component

Select the component that opens the database connection to be reused by this component.

Account

In the Account field, enter, in double quotation marks, the account name that has been assigned to you by Snowflake.

Snowflake Region

Select an AWS region or an Azure region from the Snowflake Region drop-down list.

This field is available only when Use this Component is selected from the Connection Component drop-down list and the Use Custom Snowflake Region option is not selected in the Advanced settings view.

User Id and Password

Enter, in double quotation marks, your authentication information to log in Snowflake.

  • In the User ID field, enter, in double quotation marks, your login name that has been defined in Snowflake using the LOGIN_NAME parameter of Snowflake. For details, ask the administrator of your Snowflake system.

  • To enter the password, click the [...] button next to the password field, and then in the pop-up dialog box enter the password between double quotes and click OK to save the settings.

Warehouse

Enter, in double quotation marks, the name of the Snowflake warehouse to be used. This name is case-sensitive and is normally upper case in Snowflake.

Schema

Enter, within double quotation marks, the name of the database schema to be used. This name is case-sensitive and is normally upper case in Snowflake.

Database

Enter, in double quotation marks, the name of the Snowflake database to be used. This name is case-sensitive and is normally upper case in Snowflake.

Table

Click the [...] button and in the displayed wizard, select the Snowflake table to be used.

Schema and Edit Schema

A schema is a row description. It defines the number of fields (columns) to be processed and passed on to the next component. When you create a Spark Job, avoid the reserved word line when naming the fields.

Built-In: You create and store the schema locally for this component only.

Repository: You have already created the schema and stored it in the Repository. You can reuse it in various projects and Job designs.

If the Snowflake data type to be handled is VARIANT, OBJECT or ARRAY, while defining the schema in the component, select String for the corresponding data in the Type column of the schema editor wizard.

Click Edit schema to make changes to the schema. If the current schema is of the Repository type, three options are available:

  • View schema: choose this option to view the schema only.

  • Change to built-in property: choose this option to change the schema to Built-in for local changes.

  • Update repository connection: choose this option to change the schema stored in the repository and decide whether to propagate the changes to all the Jobs upon completion. If you just want to propagate the changes to the current Job, you can select No upon completion and choose this schema metadata again in the Repository Content window.

Note that if the input value of any non-nullable primitive field is null, the row of data including that field will be rejected.

This component offers the advantage of the dynamic schema feature. This allows you to retrieve unknown columns from source files or to copy batches of columns from a source without mapping each column individually. For further information about dynamic schemas, see Talend Studio User Guide.

This dynamic schema feature is designed for the purpose of retrieving unknown columns of a table and is recommended to be used for this purpose only; it is not recommended for the use of creating tables.

Output Action

Select the operation to insert, delete, update or merge data in Snowflake tables.

The Upsert operation allows you to merge data in a Snowflake table based on the data that is passed to tSnowflakeOutput. After selecting Upsert, select the column to be used as the join key of this operation.

Advanced settings

Additional JDBC Parameters

Specify additional connection properties for the database connection you are creating. The properties are separated by semicolon and each property is a key-value pair, for example, encryption=1;clientname=Talend.

This field is available only when you select Use this Component from the Connection Component drop-down list and select Internal from the Storage drop-down list in the Basic settings view.

Use Custom Snowflake Region
Select this check box to specify a custom Snowflake region. This option is available only when you select Use this Component from the Connection Component drop-down list in the Basic settings view.
  • Region ID: enter a region ID in double quotation marks, for example eu-west-1 or east-us-2.azure.
Login Timeout

Specify the timeout period (in minutes) of Snowflake login attempts. An error will be generated if no response is received in this period.

Tracing

Select the log level for the Snowflake JDBC driver. If enabled, a standard Java log is generated.

Role

Enter, in double quotation marks, the default access control role to use to initiate the Snowflake session.

This role must already exist and has been granted to the user ID you are using to connect to Snowflake. If this field is left empty, the PUBLIC role is automatically granted. For information about Snowflake access control model, see Understanding the Access Control Model.

Allow Snowflake to convert columns and tables to uppercase

Select this check box to convert lowercase in the defined table name and schema column names to uppercase. Note that unquoted identifiers should match the Snowflake Identifier Syntax.

If you deselect the check box, all identifiers are automatically quoted.

This property is not available when you select the Manual Query check box.

For more information on the Snowflake Identifier Syntax, see Identifier Syntax.

Custom DB Type Select this check box to specify the DB type for each column in the schema.

This property is available only when you select an action with Create Table from the Table Action drop down list in the Basic settings.

tStatCatcher Statistics

Select this check box to gather the Job processing metadata at the Job level as well as at each component level.

Global Variables

NB_LINE

The number of rows processed. This is an After variable and it returns an integer.

NB_SUCCESS

The number of rows successfully processed. This is an After variable and it returns an integer.

NB_REJECT

The number of rows rejected. This is an After variable and it returns an integer.

ERROR_MESSAGE

The error message generated by the component when an error occurs. This is an After variable and it returns a string.

Usage

Usage rule

This component is end component of a data flow in your Job. It receives data from other components via a Row > Main link.

It can also send error messages to other components via a Row > Rejects link. The provided information about an error could be:
  • The name of the column in error.

  • The number of the row in error.

  • The category of the error, such as a parsing error or a conversion error.

  • The character offset in the line in error.

  • The related error message.

  • The offset of the byte in error.

  • The number of the line in error.

  • SQLSTATE for the error.

  • Snowflake error code.