There any performance differences between a SQL function written in SQL
language or PL/psSQL language? For example:
Create or replace function sp_getfreq(
Var1 integer
) returns Boolean as
$$
Declare
Myval Boolean;
Begin
Select var1 in (select var3 from table1) into myval;
Return myval;
End;
$$
Language plpgsql stable;
And with:
Create or replace function sp_getfreq(
Var1 integer
) returns boolean as
$$
Select $1 in (select var3 from table1);
$$
Language sql stable;
I know the function is really simple, but in theory which of the three would
run faster?
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