Why does the PostgreSQL connector remove \ from a text field?

Diana Rus 0 Reputation points
2024-06-17T10:07:26.5733333+00:00

Hi,

I have a pipeline that copies data from a postgresql db table into an azure db. This table has a column that contains special characters like {. The copy activity has been running for a long time without issues, however last week overnight it decided that the \ will no longer be brought back. If I connect directly into the Postgresql db I can still see the \ in that column, if I preview data in ADF those \ don't appear and are subsequently not being copied into the Azure db. Why has this happened?

See below screenshots of the 2 behaviours.

ADF:

User's image

PostgreSql db:

User's image

Azure Data Factory
Azure Data Factory
An Azure service for ingesting, preparing, and transforming data at scale.
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  1. phemanth 8,485 Reputation points Microsoft Vendor
    2024-06-17T10:36:52.08+00:00

    @Diana Rus

    Thanks for using MS Q&A platform and posting your query.

    The issue you’re experiencing might be due to the way the backslash (\) character is handled in different systems. The backslash is often used as an escape character in many programming languages and databases, including PostgreSQL. This means that it’s used to introduce special character sequences.

    If a system or language interprets the backslash as an escape character, it will treat the \ character and the character following it as a special sequence, and it won’t be displayed in the output. This could be why you’re not seeing the \ character when you preview the data in Azure Data Factory (ADF).

    To resolve this issue, you might need to adjust the settings or the query used in your pipeline to ensure that the \ character is correctly copied from the PostgreSQL database to the Azure database. This could involve adding an extra \ to escape the backslash itself (i.e., \\), or changing the settings to treat the \ as a literal character instead of an escape character.

    Please note that the exact solution might depend on the specifics of your pipeline and the data you’re working with

    Hope this helps. Do let us know if you any further queries.