BigQuery Table Create
In this article
Overview
You can use this Snap to create Google BigQuery tables that support clustering and partitioning.
Snap Type
The Google BigQuery Table Create Snap is a Write-type Snap that creates BigQuery tables.
Prerequisites
A valid Google BigQuery account with the required permissions.
Support for Ultra Pipelines Â
Works in Ultra Pipelines.Â
Limitations and Known Issues
The
rounding_mode
option for BIGNUMERIC and NUMERIC data type fields is not supported. These data type fields fields can be configured on the Google Cloud console.This Snap considers only the following JSON keys in the schema during table creation (any other keys given are ignored):
name
type
mode
description
fields
In the following example, the Snap creates the table with the with name
, type
, and mode
keys but ignores defaultValueExpression
. There is no error displayed for unsupported keys.
[{
"name": "sales",
"type": "FLOAT",
"mode": "NULLABLE",
"defaultValueExpression": "2.55"
}]
Snap Views
Type | Format | Number of Views | Examples of Upstream and Downstream Snaps | Description |
---|---|---|---|---|
Input | Document |
|
| The Project ID and the Document ID. |
Output | Document |
|
| The list of Table IDs along with their Project IDs, Dataset IDs, and Table type. |
Error | Error handling is a generic way to handle errors without losing data or failing the Snap execution. You can handle the errors that the Snap might encounter while running the Pipeline by choosing one of the following options from the When errors occur list under the Views tab:
Learn more about Error handling in Pipelines. |
Snap Settings
Asterisk ( * ): Indicates a mandatory field.
Suggestion icon (): Indicates a list that is dynamically populated based on the configuration.
Expression icon ( ): Indicates the value is an expression (if enabled) or a static value (if disabled). Learn more about Using Expressions in SnapLogic.
Add icon ( ): Indicates that you can add fields in the field set.
Remove icon ( ): Indicates that you can remove fields from the field set.
Field Name | Field Type | Field Dependency | Description | |
---|---|---|---|---|
Label* Default Value:Â BigQuery Table Create | String/Expression | None | Specify a unique name for the Snap. Modify this to be more specific, especially if you have more than one Snap of the same type in your pipeline. | |
Project ID Default Value:Â N/A | String/Expression/Suggestion | None | Specify the project ID in which the dataset resides. | |
Dataset ID Default Value:Â N/A | String/Expression/Suggestion | None | Specify the dataset ID of the destination. | |
Table ID Default Value:Â N/A | String/Expression/Suggestion | None | Specify the table ID of the table you are creating. This is a unique ID that you must provide (it is not automatically created or assigned). Learn more about creating valid BigQuery table names. | |
Table Schema (JSON) | String | None | Enter the JSON schema for the table. | |
Detailed Information Default value: Deselected | Checkbox | None | Select this checkbox to enable the Snap to access additional fields for displaying them in the output. | |
Default table expiration (in days) | String/Expression | Appears when you select the Detailed Information checkbox. | New tables created in this dataset will be automatically deleted in the number of days specified. | |
Partitioning
| Use this field set to define partitioning requirements. | |||
Enable partitioning Default Value: Deselected | Checkbox | Appears when you select the Partitioning dropdown. | Select to configure partitioning. | |
Require partitioning filter Default Value: Deselected | Checkbox | Appears when you select the Enable Partitioning checkbox. | Select to require users to include a WHERE clause that specifies the partitions to query each time they query the table. Select the partitioning type (time or range) and the partitioning time (time interval after which a new partition is created). | |
Clustering  | Use this field set to define clustering requirements. | |||
Enable clustering Default Value: Deselected | Checkbox | Appears when you select the Clustering dropdown. | Select to configure clustering. | |
Snap Execution Default Value:Â Validate & Execute | Â | Dropdown list | None | Select one of the following three modes in which the Snap executes:
|
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Examples
Creating a BigQuery Table
This example demonstrates how to create a table from a BigQuery dataset.
Configure the Snap with the Project ID, Dataset ID, Table ID, and Table schema in JSON format.
On validation, the Snap lists information about the newly created table in the output.
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Creating a BigQuery Table After Filtering the Dataset
This example pipeline demonstrates how to read tables from a BigQuery dataset and create a new table from the filtered the dataset.
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First, configure the BigQuery Table List Snap with the Project ID and Dataset ID of the dataset from which the table data is to be listed.
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On validation, the Snap lists the tables in the dataset.
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Next, configure the Filter Snap with an expression that filters the data to limit it to just the Inventory table: $table_id=="Inventory"
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On validation, the Snap lists information about the filtered data in the output.
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Configure the Table Create Snap with the Project ID, Dataset ID, Table ID, and Table schema in JSON format.
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On validation, the Snap lists information about the newly created table in the output.
Downloads
Download and import the pipeline into SnapLogic.
Configure Snap accounts, as applicable.
Provide pipeline parameters, as applicable.
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