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Version: 0.5.4

SQL INSERT File Format

This file format contains an INSERT...VALUES statement to be executed on the destination during the load stage.

Additional data types are stored as follows:

  • datetime and date are stored as ISO strings;
  • decimal is stored as a text representation of a decimal number;
  • binary storage depends on the format accepted by the destination;
  • complex storage also depends on the format accepted by the destination.

This file format is compressed by default.

Supported Destinations​

This format is used by default by: DuckDB, Postgres, Redshift.

It is also supported by: Filesystem.

How to configure​

There are several ways of configuring dlt to use insert_values file format for normalization step and to store your data at the destination:
  1. You can set the loader_file_format argument to insert_values in the run command:
info = pipeline.run(some_source(), loader_file_format="insert_values")
  1. You can set the loader_file_format in config.toml or secrets.toml:
[normalize]
loader_file_format="insert_values"
  1. You can set the loader_file_format via ENV variable:
export NORMALIZE__LOADER_FILE_FORMAT="insert_values"
  1. You can set the file type directly in the resource decorator.
@dlt.resource(file_format="insert_values")
def generate_rows(nr):
    pass

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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