feat: propagate column comments as schema descriptions#3805
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tuantran0910 wants to merge 1 commit intodlt-hub:develfrom
Open
feat: propagate column comments as schema descriptions#3805tuantran0910 wants to merge 1 commit intodlt-hub:develfrom
tuantran0910 wants to merge 1 commit intodlt-hub:develfrom
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Bridge SQLAlchemy column .comment to dlt TColumnSchema description field so users loading from databases with documented columns preserve that metadata through to the destination. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
tuantran0910
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Description
Bridges SQLAlchemy
column.commentto dlt'sTColumnSchema.descriptionfield in the sql_database source. Column comments from documented databases (PostgreSQL, MySQL, Oracle) are now preserved during schema conversion.Previously, column descriptions were lost even though dlt supports the field and destinations like BigQuery, Databricks, and Snowflake can write them.
Example:
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