Re: [HACKERS] psql - add special variable to reflect the last querystatus
От | Fabien COELHO |
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Тема | Re: [HACKERS] psql - add special variable to reflect the last querystatus |
Дата | |
Msg-id | alpine.DEB.2.20.1706271537220.31961@lancre обсуждение исходный текст |
Ответ на | Re: [HACKERS] psql - add special variable to reflect the last query status (Pavel Stehule <pavel.stehule@gmail.com>) |
Ответы |
Re: [HACKERS] psql - add special variable to reflect the last query status
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Список | pgsql-hackers |
Hello Pavel, >> We can introduce macro SetVariableBool(vars, varname, bool) instead >> >> SetVariable(pset.vars, "ERROR", "FALSE"); > > I checked source code, and it requires little bit more harder refactoring > because now we have SetVariableBool - what is unhappy name, because it > initialize variable to ON value. It is question what is better name? The boolean values (on/off 1/0 true/false...) accepted for pg settings is probably convenient but also somehow fuzzy. From a programming point of view, I like booleans to have either true or false values, and nothing else. I agree that the existing "SetVariableBool" function is a misnommer, it should be "SetVariableOn" given what it does, and it is not what we need. Here is a v4 which attempts to extend & reuse the function. People might be surprised that TRUE is used where ON was used before, so I'm not sure. > I found more interesting issue - the code of SetResultVariables is > partially redundant with AcceptResult - maybe the switch there can be > shared. I agree that there is some common structure, but ISTM that the AcceptResult function is called in a variety of situation where variables are not to be set (eg "internal" queries, not user provided queries), so I thought it best to keep the two apart. -- Fabien. -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
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