I would think that depends upon how the sql in the file is coded.  You can use the 
RAISE NOTICE / ERROR commands to abort a function's execution.

> Can psql be told to exit immediately after an error (especially when 
> doing commands from a file, -f)? This is the default behaviour of the 
> mysql client, except when we give it -f option ("force").
> 
> The problem is, when restoring a dump, a failure at the some point might 
> cause the subsequent commands to produce wrong results (e.g. I redefine 
> a builtin function with a plruby function with different behaviour, but 
> plruby failed to be installed due to wrong path. Thus the subsequent 
> commands are executed using the builtin function which is not the 
> expected one.) Furthermore, you can't check on psql exit code to see 
> whether _any_ command was not successfully executed.
> 
> Of course one should examine the full psql output after a restore 
> anyway, and the option to exit immediately after an error can save time 
> (especially for large dumps).
> 
> -- 
> dave
> 
> 
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