itagaki@postgresql.org (Takahiro Itagaki) writes:
> Add psql tab completion for DO blocks.
> Also adjust documentation of DO.
This syntax synopsis is completely nuts:
DO { [ LANGUAGE <replaceable class="PARAMETER">lang_name</replaceable> ] | <replaceable
class="PARAMETER">code</replaceable>} ...
It implies that an empty string is a valid substitute for the { ... }
construct, since I could take the first choice and then omit the
optional bracketed construct.
I think that it would be logically correct without the square brackets,
but as a matter of clarity I really doubt it's an improvement over the
original.
regards, tom lane
