Incremental View Maintenance: ERROR: out of shared memory

Hello 
here is an unexpected error found while testing IVM v11 patches

create table b1 (id integer, x numeric(10,3));
create incremental materialized view mv1 
as select id, count(*),sum(x) from b1 group by id;

do $$ 
declare 
    i integer;
begin 
    for i in 1..10000 
    loop 
        insert into b1 values (1,1); 
    end loop; 
end;
$$
;

ERROR:  out of shared memory
HINT:  You might need to increase max_locks_per_transaction.
CONTEXT:  SQL statement "DROP TABLE pg_temp_3.pg_temp_66154"
SQL statement "insert into b1 values (1,1)"
PL/pgSQL function inline_code_block line 1 at SQL statement

Regards
PAscal



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