COPY ignoring extra columns

Question

I recently noticed that Redshift COPY command is ignoring any extra columns at the end of the source file which are missing in the table being loaded. I remember copy command used to fail with `Extra columns found` error earlier. Is this a new behavior recently released?

Answer

Hello,

As per https://docs.aws.amazon.com/redshift/latest/dg/r_COPY.html , there has been no change to COPY command recently.

If you use COPY command with "maxerror" parameter then it will ignore the records with additional columns.

https://docs.aws.amazon.com/redshift/latest/dg/copy-parameters-data-load.html#copy-maxerror

Thank You !

COPY ignoring extra columns

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