Commit 2fc78cb3 authored by unknown's avatar unknown
Browse files

Bug#12518 

  "COLUMN_DEFAULT has wrong value if NOT NULL is set"
  Show NULL instead of empty string when no default value is set


mysql-test/r/information_schema.result:
  test for bug 12518
mysql-test/t/information_schema.test:
  test for bug 12518
sql/sql_show.cc:
  report NULL for information schema result when there is no default value
parent 3b422187

mysql-test/r/information_schema.result

+9 −0
Original line number Diff line number Diff line
@@ -958,3 +958,12 @@ trigger_schema trigger_name 
test	tr1

use test;

drop table t1;

create table t1 (a int not null, b int);

use information_schema;

select column_name, column_default from columns

where table_schema='test' and table_name='t1';

column_name	column_default

a	NULL

b	NULL

use test;

drop table t1;

mysql-test/t/information_schema.test

+10 −0
Original line number Diff line number Diff line
@@ -639,3 +639,13 @@ select trigger_schema, trigger_name from triggers where 
trigger_name='tr1';

use test;

drop table t1;



#

# Bug#12518 COLUMN_DEFAULT has wrong value if NOT NULL is set

#

create table t1 (a int not null, b int);

use information_schema;

select column_name, column_default from columns

  where table_schema='test' and table_name='t1';

use test;

drop table t1;

sql/sql_show.cc

+1 −0
Original line number Diff line number Diff line
@@ -2462,6 +2462,7 @@ static int get_schema_column_record(THD *thd, struct st_table_list *tables, 
        table->field[5]->set_notnull();

      }

      else if (field->unireg_check == Field::NEXT_NUMBER ||

               lex->orig_sql_command != SQLCOM_SHOW_FIELDS ||

               field->maybe_null())

        table->field[5]->set_null();                // Null as default

      else