create table t1 (a int primary key, b int) partition by hash (a);

create table t1_00 partition of t1 for values with (modulus 64, remainder 0);
create table t1_01 partition of t1 for values with (modulus 64, remainder 1);
create table t1_02 partition of t1 for values with (modulus 64, remainder 2);
create table t1_03 partition of t1 for values with (modulus 64, remainder 3);
create table t1_04 partition of t1 for values with (modulus 64, remainder 4);
create table t1_05 partition of t1 for values with (modulus 64, remainder 5);
create table t1_06 partition of t1 for values with (modulus 64, remainder 6);
create table t1_07 partition of t1 for values with (modulus 64, remainder 7);
create table t1_08 partition of t1 for values with (modulus 64, remainder 8);
create table t1_09 partition of t1 for values with (modulus 64, remainder 9);

create table t1_10 partition of t1 for values with (modulus 64, remainder 10);
create table t1_11 partition of t1 for values with (modulus 64, remainder 11);
create table t1_12 partition of t1 for values with (modulus 64, remainder 12);
create table t1_13 partition of t1 for values with (modulus 64, remainder 13);
create table t1_14 partition of t1 for values with (modulus 64, remainder 14);
create table t1_15 partition of t1 for values with (modulus 64, remainder 15);
create table t1_16 partition of t1 for values with (modulus 64, remainder 16);
create table t1_17 partition of t1 for values with (modulus 64, remainder 17);
create table t1_18 partition of t1 for values with (modulus 64, remainder 18);
create table t1_19 partition of t1 for values with (modulus 64, remainder 19);

create table t1_20 partition of t1 for values with (modulus 64, remainder 20);
create table t1_21 partition of t1 for values with (modulus 64, remainder 21);
create table t1_22 partition of t1 for values with (modulus 64, remainder 22);
create table t1_23 partition of t1 for values with (modulus 64, remainder 23);
create table t1_24 partition of t1 for values with (modulus 64, remainder 24);
create table t1_25 partition of t1 for values with (modulus 64, remainder 25);
create table t1_26 partition of t1 for values with (modulus 64, remainder 26);
create table t1_27 partition of t1 for values with (modulus 64, remainder 27);
create table t1_28 partition of t1 for values with (modulus 64, remainder 28);
create table t1_29 partition of t1 for values with (modulus 64, remainder 29);

create table t1_30 partition of t1 for values with (modulus 64, remainder 30);
create table t1_31 partition of t1 for values with (modulus 64, remainder 31);
create table t1_32 partition of t1 for values with (modulus 64, remainder 32);
create table t1_33 partition of t1 for values with (modulus 64, remainder 33);
create table t1_34 partition of t1 for values with (modulus 64, remainder 34);
create table t1_35 partition of t1 for values with (modulus 64, remainder 35);
create table t1_36 partition of t1 for values with (modulus 64, remainder 36);
create table t1_37 partition of t1 for values with (modulus 64, remainder 37);
create table t1_38 partition of t1 for values with (modulus 64, remainder 38);
create table t1_39 partition of t1 for values with (modulus 64, remainder 39);

create table t1_40 partition of t1 for values with (modulus 64, remainder 40);
create table t1_41 partition of t1 for values with (modulus 64, remainder 41);
create table t1_42 partition of t1 for values with (modulus 64, remainder 42);
create table t1_43 partition of t1 for values with (modulus 64, remainder 43);
create table t1_44 partition of t1 for values with (modulus 64, remainder 44);
create table t1_45 partition of t1 for values with (modulus 64, remainder 45);
create table t1_46 partition of t1 for values with (modulus 64, remainder 46);
create table t1_47 partition of t1 for values with (modulus 64, remainder 47);
create table t1_48 partition of t1 for values with (modulus 64, remainder 48);
create table t1_49 partition of t1 for values with (modulus 64, remainder 49);

create table t1_50 partition of t1 for values with (modulus 64, remainder 50);
create table t1_51 partition of t1 for values with (modulus 64, remainder 51);
create table t1_52 partition of t1 for values with (modulus 64, remainder 52);
create table t1_53 partition of t1 for values with (modulus 64, remainder 53);
create table t1_54 partition of t1 for values with (modulus 64, remainder 54);
create table t1_55 partition of t1 for values with (modulus 64, remainder 55);
create table t1_56 partition of t1 for values with (modulus 64, remainder 56);
create table t1_57 partition of t1 for values with (modulus 64, remainder 57);
create table t1_58 partition of t1 for values with (modulus 64, remainder 58);
create table t1_59 partition of t1 for values with (modulus 64, remainder 59);

create table t1_60 partition of t1 for values with (modulus 64, remainder 60);
create table t1_61 partition of t1 for values with (modulus 64, remainder 61);
create table t1_62 partition of t1 for values with (modulus 64, remainder 62);
create table t1_63 partition of t1 for values with (modulus 64, remainder 63);

insert into t1 (select i, i from generate_series(1, 10000000) as i);

analyze;