On Sat, May 20, 2023 at 4:43 PM Marcos Pegoraro <marcos@xxxxxxxxxx> wrote:
I have a table like pg_settings, so records have name and value.
Hi. Maybe I'm missing something, but why aren't you simply doing:
select name, varvalue from sys_var where name = any($1)
and binding your 4 (in your examples) or 10 or 1 name(s) as a text array (i.e. text[])?
With a prepared statement you plan only once.
You can also avoid selecting names by unnest'ing the text-array with ordinality
and join+sort on it, to get the values in name order (i.e. same order as $1 you control).
See my recent thread where I learned about that technique.
Generating SQL text dynamically when you can avoid it with proper binding
and appropriate SQL is leaving performance on the table IMHO. --DD
