May 2018
Intermediate to advanced
576 pages
30h 25m
English
Overall, this is just an example of dynamic scripting, and it has been used by DBAs for many decades, even before PostgreSQL was born.
This method can go wrong in various ways, especially if you generate SQL text with syntax errors. Just fix that and carry on.
The \t command means tuples only, so keeping \t to on will ensure that there are no headers, command tags, or row counts following the results.
The \o FILENAME command redirects the output to a file until the subsequent \o command reverts to no redirection.
The \! command runs operating system commands, so \! cat will show the file contents on *nix systems.
The \i command redirects the input from a file, or in simpler terms, executes the named file. Running the script ...