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postgresql/contrib/file_fdw/data/text.csv

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Provide a FORCE NULL option to COPY in CSV mode. This forces an input field containing the quoted null string to be returned as a NULL. Without this option, only unquoted null strings behave this way. This helps where some CSV producers insist on quoting every field, whether or not it is needed. The option takes a list of fields, and only applies to those columns. There is an equivalent column-level option added to file_fdw. Ian Barwick, with some tweaking by Andrew Dunstan, reviewed by Payal Singh.
2014-03-04 17:31:59 -05:00
AAA,aaa,123,""
XYZ,xyz,"",321
NULL,NULL,NULL,NULL
NULL,NULL,"NULL",NULL
ABC,abc,"",""
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