Thread: Question Regarding COPY Command Handling of Line Breaks in PostgreSQL
Dear,
I am encountering an issue with the COPY command in PostgreSQL regarding the handling of line breaks in data fields. My PostgreSQL instance is installed on a Linux system.
When I use the COPY command to export data to a CSV file and then import the same CSV file back into the database, all carriage return characters (CR) in the fields are automatically converted to line feed characters (LF). For example:
Field content before import: *** (CR) ***
Field content after import: *** (LF) ***
I would like to know if there is a way to use the COPY command while preserving the original line breaks (CR) in the data fields during import.
Thank you for your assistance.
Best regards,
gzh
On Fri, Jul 11, 2025 at 8:20 AM gzh <gzhcoder@126.com> wrote:
Dear,I am encountering an issue with the COPY command in PostgreSQL regarding the handling of line breaks in data fields. My PostgreSQL instance is installed on a Linux system.When I use the COPY command to export data to a CSV file and then import the same CSV file back into the database, all carriage return characters (CR) in the fields are automatically converted to line feed characters (LF). For example:Field content before import: *** (CR) ***Field content after import: *** (LF) ***I would like to know if there is a way to use the COPY command while preserving the original line breaks (CR) in the data fields during import.
What PG version?
What's the full command (including both shell and SQL commands)?
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On 7/11/25 06:07, Ron Johnson wrote: > On Fri, Jul 11, 2025 at 8:20 AM gzh <gzhcoder@126.com > <mailto:gzhcoder@126.com>> wrote: > What PG version? > What's the full command (including both shell and SQL commands)? Also provide a sample of the original exported data and a sample of the data after it is imported. -- Adrian Klaver adrian.klaver@aklaver.com