Re: [PATCH] psql: Add tab-complete for optional view parameters

From: David Zhang <david(dot)zhang(at)highgo(dot)ca>
To: Christoph Heiss <christoph(at)c8h4(dot)io>
Cc: PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: [PATCH] psql: Add tab-complete for optional view parameters
Date: 2023-08-14 17:34:11
Message-ID: ed54075e-506b-7860-ebce-1bfccc265780@highgo.ca
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>> [..]
>>
>> For below changes,
>>
>>      else if (TailMatches("CREATE", "VIEW", MatchAny, "AS") ||
>> -             TailMatches("CREATE", "OR", "REPLACE", "VIEW", MatchAny,
>> "AS"))
>> +             TailMatches("CREATE", "VIEW", MatchAny, "WITH", "(*)", "AS")
>> ||
>> +             TailMatches("CREATE", "OR", "REPLACE", "VIEW", MatchAny, "AS")
>> ||
>> +             TailMatches("CREATE", "OR", "REPLACE", "VIEW", MatchAny,
>> "WITH", "(*)", "AS"))
>>
>> it would be great to switch the order of the 3rd and the 4th line to make a
>> better match for "CREATE" and "CREATE OR REPLACE" .
> I don't see how it would effect matching in any way - or am I
> overlooking something here?

It won't affect the SQL matching. What I was trying to say is that using
'CREATE OR REPLACE ...' after 'CREATE ...' can enhance code structure,
making it more readable. For instance,

/* Complete CREATE [ OR REPLACE ] VIEW <name> WITH ( ... ) with "AS" */
else if (TailMatches("CREATE", "VIEW", MatchAny, "WITH", "(*)") ||
                 TailMatches("CREATE", "OR", "REPLACE", "VIEW",
MatchAny, "WITH", "(*)"))
        COMPLETE_WITH("AS");

"CREATE", "OR", "REPLACE", "VIEW", MatchAny, "WITH", "(*)" follows
"CREATE", "VIEW", MatchAny, "WITH", "(*)") immediately.

best regards,

David

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