Input 

Document

• Min: 0

• Max: 1

• Mapper

• JSON Generator

This Snap has at most one document input view. If the input view is defined, then the where clause can substitute incoming values for a given expression (in for example, to use it as a lookup).

Output

Document

• Min: 1

• Max: 2

• Bulk Load

• File Writer

This Snap produces one document for each row in the table. 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.

A second view can be added to push the metadata for the table as a document. The metadata document can then be passed into the second input view of AlloyDB Insert Snap so that the table is created in AlloyDB with a similar schema as the source table.

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:

• Stop Pipeline Execution: Stops the current pipeline execution if the Snap encounters an error.

• Discard Error Data and Continue: Ignores the error, discards that record, and continues with the remaining records.

• Route Error Data to Error View: Routes the error data to an error view without stopping the Snap execution.

Learn more about Error handling in Pipelines.

Label*

Default Value: AlloyDB Select
Example: Select Query

String

N/A

Specify a unique name for the Snap.

Schema name

Default Value: N/A
Example: SYS

String/Expression/Suggestion

N/A

The database schema name. Selecting a schema filters the Table name list to show only those tables within the selected schema. The property is suggestible and will retrieve available database schemas during suggest values.

Table name*

Default Value: N/A
Example: people

String/Expression/Suggestion

N/A

Specify the name of the table to execute a select query on.

Where clause

Default Value: N/A
Example:

Without using expressions

• email = 'you@example.com' or email = $email 

• emp=$emp

Using expressions

• "EMPNO=$EMPNO and ENAME=$EMPNAME"

• "emp='" + $emp + "'"

• "EMPNO=" + $EMPNO + " and ENAME='" + $EMPNAME+ "'"

String/Expression/Suggestion

N/A

Where clause of the 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). 

Order By

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

Limit offset

Default Value: None
Example: 10

Integer/Expression/Suggestion

N/A

Number of rows to return from the query.

Limit rows 

Default Value: None.
Example: 10

Integer/Expression/Suggestion

N/A

Number of rows to return from the query.

Output fields

Default Value: None
Example: email, address, first, last, etc.

String/Expression/Suggestion

N/A

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

Fetch output fields In schema

Default Value: Not Selected
Example: Selected

Checkbox

N/A

Select this checkbox 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 select the Fetch Output Fields In Schema check box.

Pass through

Default Value: Selected
Example: Not Selected

Checkbox

N/A

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

Ignore empty result

Default Value: Not Selected
Example: Selected

Checkbox

N/A

If selected, no document will be written to the output view when a SELECT operation does not produce any result. If this property is not selected and the Pass through property is selected, the input document will be passed through to the output view.

Auto commit

Default Value: False
Example: True

Dropdown List

N/A

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 autocommit 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 the Auto commit property value inherited by the Account used by the Snap.

Match data types

Default Value: Not Selected
Example: Selected

Checkbox

N/A

This property applies only when the Output fields property is provided with any field value.

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.

Number of retries

Default Value: 0
Example: 3

Integer/Expression

N/A

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.

Retry interval (seconds)

Default Value: 1
Example: 10

Integer/Expression

N/A

Specifies the time interval between two successive retry requests. A retry happens only when the previous attempt resulted in an exception. 

Staging mode

Default Value: In memory
Example: On disk

Dropdown List

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

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

• 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, so 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.

To disable staging, enter 0 in the Number of retries field.

Snap Execution

Default Value: 
Example: Validate & Execute

Dropdown list

N/A

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.