How to import ZIpped file into Postgres Table

问题

I would like to important a file into my Postgresql system(specificly RedShift). I have found a arguement for copy that allows importing a gzip file. But the provider for the data I am trying to include in my system only produces the data in a .zip. Any built in postgres commands for opening a .zip?

回答1:

From within Postgres:

COPY table_name FROM PROGRAM 'unzip -p input.csv.zip' DELIMITER ',';

From the man page for unzip -p:

-p     extract files to pipe (stdout).  Nothing but the file data is sent to stdout, and the files are always extracted  in  binary
       format, just as they are stored (no conversions).

回答2:

Can you just do something like

unzip -c myfile.zip | gzip myfile.gz

Easy enough to automate if you have enough files.

回答3:

This might only work when loading redshift from S3, but you can actually just include a "gzip" flag when copying data to redshift tables, as described here:

This is the format that works for me if my s3 bucket contains a gzipped .csv.

copy <table> from 's3://mybucket/<foldername> '<aws-auth-args>' delimiter ',' gzip;

回答4:

unzip -c /path/to/.zip | psql -U user

The 'user' must be have super user right else you will get a

ERROR:  must be superuser to COPY to or from a file

To learn more about this see

https://www.postgresql.org/docs/8.0/static/backup.html

Basically this command is used in handling large databases

来源：https://stackoverflow.com/questions/17750706/how-to-import-zipped-file-into-postgres-table