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Version: devel

dlt.sources.sql_database.helpers

SQL database source helpers

unwrap_json_connector_x​

def unwrap_json_connector_x(field: str) -> TDataItem

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Creates a transform function to be added with add_map that will unwrap JSON columns ingested via connectorx. Such columns are additionally quoted and translate SQL NULL to json "null"

remove_nullability_adapter​

def remove_nullability_adapter(table: Table) -> Table

View source on GitHub

A table adapter that removes nullability from columns.

SqlTableResourceConfiguration Objects​

@configspec
class SqlTableResourceConfiguration(BaseConfiguration)

View source on GitHub

incremental​

type: ignore[type-arg]

default_engine_adapter_callback​

def default_engine_adapter_callback(engine: Engine,
                                    metadata: MetaData) -> None

View source on GitHub

Applies default engine adaptations for known dialects.

For Oracle dialect, registers an event listener on the provided MetaData that forces NUMBER columns to be reflected as Python Decimal to preserve numeric precision.

Arguments:

  • engine - The SQLAlchemy engine to check dialect for.
  • metadata - The MetaData instance to register the listener on.

This demo works on codespaces. Codespaces is a development environment available for free to anyone with a Github account. You'll be asked to fork the demo repository and from there the README guides you with further steps.
The demo uses the Continue VSCode extension.

Off to codespaces!

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