task(connector-sdk): Adding example for composite primary key operations

[fivetran-sahilkhirwal]

closes https://fivetran.height.app/T-898799

Example description

• It has examples for update and delete operations when the primary key is composite ( contains more than one columns)
  
  

Verification of the connector

[height]

This pull request has been linked to and will mark 1 task as "Done" when merged:

• T-898799 Connector SDK: Example for update method (unlink task)

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[Copilot]

PR Overview

This PR adds two complete examples demonstrating how to handle composite primary key operations in Fivetran connectors—one for update operations and one for delete operations—and updates the documentation accordingly.

• Adds an update example that shows how to perform composite key updates on the product_inventory table.
• Adds a delete example that illustrates composite key deletion on the sample_table table.
• Updates the README to document the composite primary key approaches used in both examples.

Reviewed Changes

File	Description
update_example/connector.py	Introduces update operations using composite keys on product_inventory.
delete_example/connector.py	Demonstrates delete operations using composite keys on sample_table.
README.md	Documents examples and explains composite key operations for update and delete scenarios.

Copilot reviewed 7 out of 7 changed files in this pull request and generated 1 comment.

Comments suppressed due to low confidence (2)

examples/common_patterns_for_connectors/update_and_delete/update_example/connector.py:160

• [nitpick] There appear to be multiple yield statements for op.checkpoint(state) (one earlier and another at the end). Consider removing the redundant final checkpoint yield if it is not required.

    yield op.checkpoint(state)

examples/common_patterns_for_connectors/update_and_delete/README.md:20

• The note in the delete section incorrectly uses 'updating' instead of 'deleting'. Update the text to say 'When deleting records with composite primary keys...' to clearly reflect the operation being described.

> NOTE: When updating records with composite primary keys, you need to ensure that the primary key values are included in the delete payload. If there are multiple primary key columns, you need to include all of them in the payload to identify the record to mark as deleted.

[Copilot]

Pull Request Overview

This PR adds examples for handling composite primary key operations in Fivetran connectors, demonstrating both update and delete workflows.

• Added delete_example and update_example connector scripts that illustrate various cases of operations with composite primary keys.
• Updated README documentation to reference the new examples and clarify their purpose.

Reviewed Changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 1 comment.

File	Description
examples/common_patterns_for_connectors/update_and_delete/delete_example/connector.py	Adds delete example demonstrating composite primary key deletion cases.
examples/common_patterns_for_connectors/update_and_delete/update_example/connector.py	Adds update example demonstrating composite primary key update cases.
examples/common_patterns_for_connectors/update_and_delete/README.md	Provides an overview and instructions on handling composite primary keys.
README.md	Updates the list of examples to include the new composite primary key operations example.

[varundhall]

please remove the inner readme

[Copilot]

Pull Request Overview

This PR adds examples for handling composite primary key operations in both update and delete contexts using the Fivetran Connector SDK.

• Introduces an update example with composite primary key support.
• Introduces a delete example with composite primary key support.
• Updates the README to include the new update and delete example.

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 1 comment.

File	Description
examples/common_patterns_for_connectors/update_and_delete/update_example/connector.py	Provides an example demonstrating update operations using composite primary keys.
examples/common_patterns_for_connectors/update_and_delete/delete_example/connector.py	Provides an example demonstrating delete operations using composite primary keys.
README.md	Updates the examples list with a reference to the new update and delete example.

[Copilot]

Pull Request Overview

This pull request adds two example connectors demonstrating composite primary key operations for update and delete operations.

• Adds an update_example that showcases various update scenarios when a composite primary key is provided.
• Adds a delete_example that demonstrates delete operations using composite primary keys.
• Updates the README documentation to include a reference to the composite primary key examples.

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 1 comment.

File	Description
examples/common_patterns_for_connectors/update_and_delete/update_example/connector.py	Adds an example for update operations with composite primary keys.
examples/common_patterns_for_connectors/update_and_delete/delete_example/connector.py	Adds an example for delete operations using composite primary keys.
README.md	Updates documentation to include the new composite primary key example.

[Copilot]

Pull Request Overview

This pull request adds new examples for handling composite primary key operations using update and delete methods in the fivetran_connector_sdk. The key changes include:

• A new update example demonstrating composite primary key upsert and update operations.
• A new delete example illustrating composite primary key deletion operations.
• An update to the README to reference the new examples.

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 1 comment.

File	Description
examples/common_patterns_for_connectors/update_and_delete/update_example/connector.py	Provides an example implementation of update operations with a composite primary key.
examples/common_patterns_for_connectors/update_and_delete/delete_example/connector.py	Provides an example implementation of delete operations with a composite primary key.
README.md	Updates documentation to include a reference to the composite primary key update and delete examples.

Comments suppressed due to low confidence (2)

examples/common_patterns_for_connectors/delete_example/connector.py:53

• Ensure the connection assignment is updated by using self.connection = self.connect() when there is no active connection to properly store and reuse the connection object.

if not self.connection:

examples/common_patterns_for_connectors/update_and_delete/update_example/connector.py:159

• [nitpick] There are multiple checkpoint calls in the update function; consider consolidating them to a single checkpoint call to streamline the state update process.

yield op.checkpoint(state)

[fivetran-chiragramachandraiah]

Lgtm! Pls test it using a test connector if the results match/failures. Added few comments.