Postgresql – Source several files at once with psql

postgresqlpsql

I want to execute several sql scripts sequentially with psql as a single transaction to set up my database schema. What is the best way to do this? In the past I know I had a master script that I ran psql against that included the other files however I don't remember the syntax of this script.

Best Answer

Your script could look like this:

BEGIN;
\i file1.sql
\i file2.sql
COMMIT;

Or you could do something like this:

cat file1.sql file2.sql | psql -1 -f -

Related Solutions

Postgresql – Span single transaction over several sequential psql sessions

Maybe it would be easiest to run a psql in the background, with it set to execute stdin, and connect its stdin to a named pipe. Then you can continually push data into that pipe, and finally push "end; \quit". Something like:

#!/bin/sh

psql_pipe=/tmp/psql$$
mkfifo -m 600 $psql_pipe
psql < $psql_pipe &
exec 3>$psql_pipe
psql_pid=$!

echo "> Started psql (pid=$psql_pid) reading from $psql_pipe"
trap '
  kill $psql_pid
  rm -f $psql_pipe
' EXIT

echo "begin;" >&3

echo "select now();" >&3

sleep 2

echo "select now();" >&3

sleep 2

echo "end; \quit" >&3

wait $psql_pid

Note that you can't simply do echo "sql" >$psql_pipe since the EOF would be transmitted to psql, which would then exit early-- the shell script has to keep its fd open.

PostgreSQL psql command line tool and SET CONSTRAINTS DEFERRED

The -1 option to psql causes it to wrap a file specified by -f in a BEGIN..COMMIT block, making it a transaction.

Otherwise, add the BEGIN and COMMIT commands to your script so that it becomes a single transaction.

Best Answer

Related Solutions

Postgresql – Span single transaction over several sequential psql sessions

PostgreSQL psql command line tool and SET CONSTRAINTS DEFERRED

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