Submitted by: @pavel-zotov

Is related to QA278

It is impossible to OVERWRITE any of previously assigned context variable if the number of them reaches the hard-coded limit (1000).
The following code will finished Ok only for the FIRST run. The error "Too many context variables" will occur if we run it second time - even if the limit will be decreased:

execute block returns(was_overwritten int, ctx_key varchar(30), ctx_val varchar(30))
as
declare variable k int;
begin
k = 0;
while (k < 1000) do
begin
ctx_key = 'var_' || k;

was\_overwritten=rdb$set\_context\('USER\_SESSION', :ctx\_key, rand\(\)\);
ctx\_val = rdb$get\_context\('USER\_SESSION', :ctx\_key\);
suspend;

k = k \+ 1;

end
end

Commits: c07eebd FirebirdSQL/fbt-repository@2488814