pgsql-server/ oc/src/sgml/ref/copy.sgml rc/bac ...

CVSROOT:    /cvsroot
Module name:    pgsql-server
Changes by:    tgl@svr1.postgresql.org    03/10/05 23:38:53

Modified files:
    doc/src/sgml/ref: copy.sgml
    src/backend/commands: copy.c

Log message:
    Modify COPY FROM to match the null-value string against the column value
    before it is de-backslashed, not after.  This allows the null string \N
    to be reliably distinguished from the data value \N (which must be
    represented as \\N).  Per bug report from Manfred Koizar ... but it's
    amazing this hasn't been reported before ...
    Also, be consistent about encoding conversion for null string: the form
    specified in the command is in the server encoding, but what is sent
    to/from client must be in client encoding.  This never worked quite
    right before either.