github.com/matrixorigin/matrixone@v1.2.0/test/distributed/cases/dml/insert/on_duplicate_ignore.result (about)

     1  create table if not exists indup_01 (a int primary key, b int);
     2  insert into indup_01 values (1,1);
     3  insert into indup_01 values (1,2),(2,2) on duplicate key ignore;
     4  select * from indup_01;
     5  a    b
     6  1    1
     7  2    2
     8  insert into indup_01 values (3,1),(3,2),(3,3) on duplicate key ignore;
     9  select * from indup_01;
    10  a    b
    11  1    1
    12  2    2
    13  3    1
    14  insert into indup_01 values (null,1),(null,2),(null,null) on duplicate key ignore;
    15  constraint violation: Column 'a' cannot be null
    16  select * from indup_01;
    17  a    b
    18  1    1
    19  2    2
    20  3    1