问题描述
从Postgresql文档中尚不清楚：是否将添加新生成的列锁定表？
我的Postgresql 12安装中有一张大桌子，我需要执行sql-patch：
ALTER TABLE abc ADD COLUMN gen TEXT GENERATED AS ALWAYS (...) STORED;
因此，就我而言，长时间锁定整个表是不可接受的。添加新生成的列是否安全？
解决方法
由于生成的列为AddEventHandler("playerConnecting",function(playerName,setKickReason)
playerName = (string.gsub(string.gsub(string.gsub(string.gsub(playerName,"-",""),","%."," ",""):lower())
for k,v in pairs(unauthNames) do
local g,f = playerName:find(string.lower(v))
if g or f then
local id = source;
local ids = ExtractIdentifiers(id);
local ip = ids.ip;
local steam = ids.steam:gsub("steam:","");
local steamDec = tostring(tonumber(steam,16));
steam = "https://steamcommunity.com/profiles/" .. steamDec;
local gameLicense = ids.license;
local discord = ids.discord;
local realName = GetPlayerName(source);
print(playerName .. " has been kicked for having an unauthorised name")
sendToDisc("Anti-abuse - Player kicked for having an unauthorised name",'Steam: **' .. steam .. '**\n' ..
'GameLicense: **' .. gameLicense .. '**\n' ..
'Discord UID: **' .. discord:gsub('discord:','') .. '**\n'
.. 'Name: **' .. realName ..'**\n'
.. 'Blacklisted Item: **' .. v ..'**\n');
setKickReason("[Anti-abuse] Your name,or part of it,is not permitted. Please check your name is not offensive,does not contain weblinks,odd characters or other restricted content: " ..v)
CancelEvent()
end
end
end)
，PostgreSQL必须重写该表，因此，这将花费很长时间。
为什么不使用视图来计算STORED上的列？