Commit c55ba71e authored by Tatiana A. Nurnberg's avatar Tatiana A. Nurnberg

Bug#48525: trigger changes "Column 'id' cannot be null" behaviour

CHECK_FIELD_IGNORE was treated as CHECK_FIELD_ERROR_FOR_NULL;
UPDATE...SET...NULL on NOT NULL fields behaved differently after
a trigger.

Now distinguishes between IGNORE and ERROR_FOR_NULL and save/restores
check-field options.
parent b38ac49c
......@@ -2087,4 +2087,21 @@ ERROR 42S02: Table 'test.a_nonextisting_table' doesn't exist
SELECT * FROM t2;
a b
DROP TABLE t1, t2;
CREATE TABLE t1 (id INT NOT NULL);
CREATE TABLE t2 (id INT NOT NULL);
INSERT t1 VALUES (1),(2),(3);
UPDATE t1 SET id=NULL;
Warnings:
Warning 1048 Column 'id' cannot be null
Warning 1048 Column 'id' cannot be null
Warning 1048 Column 'id' cannot be null
CREATE TRIGGER t1_bu BEFORE UPDATE ON t1 FOR EACH ROW
INSERT INTO t2 VALUES (3);
UPDATE t1 SET id=NULL;
Warnings:
Warning 1048 Column 'id' cannot be null
Warning 1048 Column 'id' cannot be null
Warning 1048 Column 'id' cannot be null
DROP TRIGGER t1_bu;
DROP TABLE t1,t2;
End of 5.1 tests.
......@@ -2396,4 +2396,17 @@ SELECT * FROM t2;
DROP TABLE t1, t2;
#
# Bug #48525: trigger changes "Column 'id' cannot be null" behaviour
#
CREATE TABLE t1 (id INT NOT NULL);
CREATE TABLE t2 (id INT NOT NULL);
INSERT t1 VALUES (1),(2),(3);
UPDATE t1 SET id=NULL;
CREATE TRIGGER t1_bu BEFORE UPDATE ON t1 FOR EACH ROW
INSERT INTO t2 VALUES (3);
UPDATE t1 SET id=NULL;
DROP TRIGGER t1_bu;
DROP TABLE t1,t2;
--echo End of 5.1 tests.
......@@ -122,13 +122,18 @@ set_field_to_null(Field *field)
return 0;
}
field->reset();
if (field->table->in_use->count_cuted_fields == CHECK_FIELD_WARN)
{
switch (field->table->in_use->count_cuted_fields) {
case CHECK_FIELD_WARN:
field->set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, WARN_DATA_TRUNCATED, 1);
/* fall through */
case CHECK_FIELD_IGNORE:
return 0;
case CHECK_FIELD_ERROR_FOR_NULL:
if (!field->table->in_use->no_errors)
my_error(ER_BAD_NULL_ERROR, MYF(0), field->field_name);
return -1;
}
if (!field->table->in_use->no_errors)
my_error(ER_BAD_NULL_ERROR, MYF(0), field->field_name);
DBUG_ASSERT(0); // impossible
return -1;
}
......@@ -178,13 +183,18 @@ set_field_to_null_with_conversions(Field *field, bool no_conversions)
field->table->auto_increment_field_not_null= FALSE;
return 0; // field is set in fill_record()
}
if (field->table->in_use->count_cuted_fields == CHECK_FIELD_WARN)
{
switch (field->table->in_use->count_cuted_fields) {
case CHECK_FIELD_WARN:
field->set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_BAD_NULL_ERROR, 1);
/* fall through */
case CHECK_FIELD_IGNORE:
return 0;
case CHECK_FIELD_ERROR_FOR_NULL:
if (!field->table->in_use->no_errors)
my_error(ER_BAD_NULL_ERROR, MYF(0), field->field_name);
return -1;
}
if (!field->table->in_use->no_errors)
my_error(ER_BAD_NULL_ERROR, MYF(0), field->field_name);
DBUG_ASSERT(0); // impossible
return -1;
}
......
......@@ -3009,6 +3009,7 @@ int
sp_instr_set_trigger_field::execute(THD *thd, uint *nextp)
{
DBUG_ENTER("sp_instr_set_trigger_field::execute");
thd->count_cuted_fields= CHECK_FIELD_ERROR_FOR_NULL;
DBUG_RETURN(m_lex_keeper.reset_lex_and_exec_core(thd, nextp, TRUE, this));
}
......
......@@ -3100,6 +3100,7 @@ void THD::reset_sub_statement_state(Sub_statement_state *backup,
}
#endif
backup->count_cuted_fields= count_cuted_fields;
backup->options= options;
backup->in_sub_stmt= in_sub_stmt;
backup->enable_slow_log= enable_slow_log;
......@@ -3137,6 +3138,7 @@ void THD::reset_sub_statement_state(Sub_statement_state *backup,
void THD::restore_sub_statement_state(Sub_statement_state *backup)
{
DBUG_ENTER("THD::restore_sub_statement_state");
#ifndef EMBEDDED_LIBRARY
/* BUG#33029, if we are replicating from a buggy master, restore
auto_inc_intervals_forced so that the top statement can use the
......@@ -3163,6 +3165,7 @@ void THD::restore_sub_statement_state(Sub_statement_state *backup)
/* ha_release_savepoint() never returns error. */
(void)ha_release_savepoint(this, sv);
}
count_cuted_fields= backup->count_cuted_fields;
transaction.savepoints= backup->savepoints;
options= backup->options;
in_sub_stmt= backup->in_sub_stmt;
......@@ -3192,6 +3195,7 @@ void THD::restore_sub_statement_state(Sub_statement_state *backup)
*/
examined_row_count+= backup->examined_row_count;
cuted_fields+= backup->cuted_fields;
DBUG_VOID_RETURN;
}
......
......@@ -995,6 +995,7 @@ public:
bool enable_slow_log;
bool last_insert_id_used;
SAVEPOINT *savepoints;
enum enum_check_fields count_cuted_fields;
};
......
......@@ -3158,7 +3158,7 @@ bool select_insert::send_data(List<Item> &values)
thd->count_cuted_fields= CHECK_FIELD_WARN; // Calculate cuted fields
store_values(values);
thd->count_cuted_fields= CHECK_FIELD_IGNORE;
thd->count_cuted_fields= CHECK_FIELD_ERROR_FOR_NULL;
if (thd->is_error())
{
table->auto_increment_field_not_null= FALSE;
......
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