MasahikoSawada / pg_block_banner

A toy program showing message in PostgreSQL table blocks.

pg_block_banner

A toy program showing message in PostgreSQL table blocks.

Build

$ gcc -o block_banner block_banner.c

Run with psql

block_banner generates and writes INSERT queries to stdout, which can be redirected to psql to run.

• -t option is the table name.
• -m option is the message to show.
• -i option writes DROP TABLE and CREATE TABLE to initialize the table.

$ ./block_banner -t test -m hello -i | psql

Where is message?

$ xxd -u -c 32 $(psql -d postgres -Atq -X -c "select current_setting('data_directory') || '/' || pg_relation_filepath('test')")

If you want to show it with delays, you can execute instead:

$ xxd -u -c 32 $(psql -d postgres -Atq -X -c "select current_setting('data_directory') || '/' || pg_relation_filepath('test')") | awk '{print $0; system("sleep 0.05")}'