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MDEV-11698 Old Bug possibly not fixed; BEFORE INSERT Trigger on NOT NULL

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check_that_all_fields_are_given_values() relied on write_set,
but was run too early, before triggers updated write_set.

also, when triggers are present, fields might get values conditionally,
so we need to check that all fields are given values for every row.
This commit is contained in:
Sergei Golubchik
2017-01-16 18:23:02 +01:00
parent e79e840607
commit ef8003eb9a
7 changed files with 119 additions and 61 deletions
Download Patch File Download Diff File Expand all files Collapse all files

118
sql/sql_insert.cc
View File

@ -304,6 +304,32 @@ static int check_insert_fields(THD *thd, TABLE_LIST *table_list,
DBUG_RETURN(0);
}
static bool has_no_default_value(THD *thd, Field *field, TABLE_LIST *table_list)
{
if ((field->flags & NO_DEFAULT_VALUE_FLAG) && field->real_type() != MYSQL_TYPE_ENUM)
{
bool view= false;
if (table_list)
{
table_list= table_list->top_table();
view= table_list->view != NULL;
}
if (view)
{
push_warning_printf(thd, Sql_condition::WARN_LEVEL_WARN, ER_NO_DEFAULT_FOR_VIEW_FIELD,
ER_THD(thd, ER_NO_DEFAULT_FOR_VIEW_FIELD),
table_list->view_db.str, table_list->view_name.str);
}
else
{
push_warning_printf(thd, Sql_condition::WARN_LEVEL_WARN, ER_NO_DEFAULT_FOR_FIELD,
ER_THD(thd, ER_NO_DEFAULT_FOR_FIELD), field->field_name);
}
return true;
}
return false;
}
/**
Check if update fields are correct.
@ -733,13 +759,10 @@ bool mysql_insert(THD *thd,TABLE_LIST *table_list,
if (mysql_prepare_insert(thd, table_list, table, fields, values,
update_fields, update_values, duplic, &unused_conds,
FALSE,
(fields.elements || !value_count ||
table_list->view != 0),
!ignore && thd->is_strict_mode()))
FALSE))
goto abort;
/* mysql_prepare_insert set table_list->table if it was not set */
/* mysql_prepare_insert sets table_list->table if it was not set */
table= table_list->table;
context= &thd->lex->select_lex.context;
@ -866,6 +889,14 @@ bool mysql_insert(THD *thd,TABLE_LIST *table_list,
table->prepare_triggers_for_insert_stmt_or_event();
table->mark_columns_needed_for_insert();
if (fields.elements || !value_count || table_list->view != 0)
{
if (check_that_all_fields_are_given_values(thd, table, table_list))
{
error= 1;
goto values_loop_end;
}
}
if (table_list->prepare_where(thd, 0, TRUE) ||
table_list->prepare_check_option(thd))
@ -965,6 +996,23 @@ bool mysql_insert(THD *thd,TABLE_LIST *table_list,
error= 1;
break;
}
/*
with triggers a field can get a value *conditionally*, so we have to repeat
has_no_default_value() check for every row
*/
if (table->triggers &&
table->triggers->has_triggers(TRG_EVENT_INSERT, TRG_ACTION_BEFORE))
{
for (Field **f=table->field ; *f ; f++)
{
if (!((*f)->flags & HAS_EXPLICIT_VALUE) && has_no_default_value(thd, *f, table_list))
{
error= 1;
goto values_loop_end;
}
(*f)->flags &= ~HAS_EXPLICIT_VALUE;
}
}
if ((res= table_list->view_check_option(thd,
(values_list.elements == 1 ?
@ -1374,10 +1422,6 @@ static void prepare_for_positional_update(TABLE *table, TABLE_LIST *tables)
be taken from table_list->table)
where Where clause (for insert ... select)
select_insert TRUE if INSERT ... SELECT statement
check_fields TRUE if need to check that all INSERT fields are
given values.
abort_on_warning whether to report if some INSERT field is not
assigned as an error (TRUE) or as a warning (FALSE).
TODO (in far future)
In cases of:
@ -1397,9 +1441,8 @@ static void prepare_for_positional_update(TABLE *table, TABLE_LIST *tables)
bool mysql_prepare_insert(THD *thd, TABLE_LIST *table_list,
TABLE *table, List<Item> &fields, List_item *values,
List<Item> &update_fields, List<Item> &update_values,
enum_duplicates duplic,
COND **where, bool select_insert,
bool check_fields, bool abort_on_warning)
enum_duplicates duplic, COND **where,
bool select_insert)
{
SELECT_LEX *select_lex= &thd->lex->select_lex;
Name_resolution_context *context= &select_lex->context;
@ -1470,17 +1513,6 @@ bool mysql_prepare_insert(THD *thd, TABLE_LIST *table_list,
check_insert_fields(thd, context->table_list, fields, *values,
!insert_into_view, 0, &map));
if (!res && check_fields)
{
bool saved_abort_on_warning= thd->abort_on_warning;
thd->abort_on_warning= abort_on_warning;
res= check_that_all_fields_are_given_values(thd,
table ? table :
context->table_list->table,
context->table_list);
thd->abort_on_warning= saved_abort_on_warning;
}
if (!res)
res= setup_fields(thd, 0, update_values, MARK_COLUMNS_READ, 0, 0);
@ -1923,8 +1955,8 @@ before_trg_err:
Check that all fields with arn't null_fields are used
******************************************************************************/
int check_that_all_fields_are_given_values(THD *thd, TABLE *entry,
TABLE_LIST *table_list)
int check_that_all_fields_are_given_values(THD *thd, TABLE *entry, TABLE_LIST *table_list)
{
int err= 0;
MY_BITMAP *write_set= entry->write_set;
@ -1932,32 +1964,8 @@ int check_that_all_fields_are_given_values(THD *thd, TABLE *entry,
for (Field **field=entry->field ; *field ; field++)
{
if (!bitmap_is_set(write_set, (*field)->field_index) &&
((*field)->flags & NO_DEFAULT_VALUE_FLAG) &&
((*field)->real_type() != MYSQL_TYPE_ENUM))
{
bool view= FALSE;
if (table_list)
{
table_list= table_list->top_table();
view= MY_TEST(table_list->view);
}
if (view)
{
push_warning_printf(thd, Sql_condition::WARN_LEVEL_WARN,
ER_NO_DEFAULT_FOR_VIEW_FIELD,
ER_THD(thd, ER_NO_DEFAULT_FOR_VIEW_FIELD),
table_list->view_db.str,
table_list->view_name.str);
}
else
{
push_warning_printf(thd, Sql_condition::WARN_LEVEL_WARN,
ER_NO_DEFAULT_FOR_FIELD,
ER_THD(thd, ER_NO_DEFAULT_FOR_FIELD),
(*field)->field_name);
}
err= 1;
}
has_no_default_value(thd, *field, table_list))
err=1;
}
return thd->abort_on_warning ? err : 0;
}
@ -3390,9 +3398,8 @@ bool mysql_insert_select_prepare(THD *thd)
if (mysql_prepare_insert(thd, lex->query_tables,
lex->query_tables->table, lex->field_list, 0,
lex->update_list, lex->value_list,
lex->duplicates,
&select_lex->where, TRUE, FALSE, FALSE))
lex->update_list, lex->value_list, lex->duplicates,
&select_lex->where, TRUE))
DBUG_RETURN(TRUE);
DBUG_ASSERT(select_lex->leaf_tables.elements != 0);
@ -3479,8 +3486,7 @@ select_insert::prepare(List<Item> &values, SELECT_LEX_UNIT *u)
{
bool saved_abort_on_warning= thd->abort_on_warning;
thd->abort_on_warning= !info.ignore && thd->is_strict_mode();
res= check_that_all_fields_are_given_values(thd, table_list->table,
table_list);
res= check_that_all_fields_are_given_values(thd, table_list->table, table_list);
thd->abort_on_warning= saved_abort_on_warning;
}