PostgreSQL copy 时提示：ERROR: invalid byte sequence for encoding "UTF8": 0xb3

测试时使用三种文件格式：

ISO-8859

Netpbm PBM image

ASCII

if [ $(file $filename|grep -c "ISO-8859") -gt 0 ]
then
　　 echo "ISO-8859"
    psql -c "copy $schemaname.$tbname from '$dirname/$filename' with(format 'csv', delimiter ', encoding 'ISO-8859-1')" $dbname
elif [ $(file $filename|grep -c "ASCII") -gt 0 ]
then
　　 echo $format
    psql -c "copy $schemaname.$tbname from '$dirname/$filename' with(format 'csv', delimiter ', encoding 'UTF-8')" $dbname
else
    psql -c "copy $schemaname.$tbname from '$dirname/$filename' with(format 'csv', delimiter ', encoding 'ISO-8859-1')" $dbname

这种处理方式在文件格式为ASCII时，copy中途仍然会出现编码错误提示。

ERROR: invalid byte sequence for encoding "UTF8": 0xb3 

最后摸索发现不管什么格式，都指定为ISO-8859-1就能处理。

全包容的编码格式，都能处理：

psql -c "copy $schemaname.$tbname from '$dirname/$filename' with(format 'csv', delimiter ', encoding 'ISO-8859-1')" $dbname