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This is how I am accessing variable in PostgreSQL.

select CURRENT_SETTING('abc.var1')

Is there an optimal way so that I can get default value i.e. 0 in case variable doesn't exist, instead of receiving an error ?

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1 Answer 1

Reset to default
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Use the two parameter version of that function (which prevents an error if the variable is missing), then use coalesce():

select coalesce(current_setting('abc.var1', true), '0');
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