Commit 97cdd9df authored by unknown's avatar unknown

Bug #17766: The server accepts to create MERGE tables which cannot work

 Changed the error reporting (and a crash) when inserting data into a
 MERGE table that has no underlying tables or no INSERT_METHOD specified
 by reporting that it is read-only.


include/my_base.h:
  Add new handler error
mysql-test/r/merge.result:
  Update results
mysql-test/t/merge.test:
  Add new regression test
sql/ha_myisammrg.cc:
  When trying to insert into a MERGE table with no underlying tables
  or no INSERT_METHOD, report that it is read-only.
sql/handler.cc:
  Handle new error message
parent c3cb4690
......@@ -347,8 +347,9 @@ enum ha_base_keytype {
#define HA_ERR_NULL_IN_SPATIAL 158 /* NULLs are not supported in spatial index */
#define HA_ERR_TABLE_DEF_CHANGED 159 /* The table changed in storage engine */
#define HA_ERR_TABLE_NEEDS_UPGRADE 160 /* The table changed in storage engine */
#define HA_ERR_TABLE_READONLY 161 /* The table is not writable */
#define HA_ERR_LAST 160 /*Copy last error nr.*/
#define HA_ERR_LAST 161 /*Copy last error nr.*/
/* Add error numbers before HA_ERR_LAST and change it accordingly. */
#define HA_ERR_ERRORS (HA_ERR_LAST - HA_ERR_FIRST + 1)
......
......@@ -782,3 +782,15 @@ create table tm (b bit(1)) engine = merge union = (t1,t2);
select * from tm;
b
drop table tm, t1, t2;
create table t1 (a int) insert_method = last engine = merge;
insert into t1 values (1);
ERROR HY000: Table 't1' is read only
create table t2 (a int) engine = myisam;
alter table t1 union (t2);
insert into t1 values (1);
alter table t1 insert_method = no;
insert into t1 values (1);
ERROR HY000: Table 't1' is read only
drop table t2;
drop table t1;
End of 5.0 tests
......@@ -399,4 +399,19 @@ create table tm (b bit(1)) engine = merge union = (t1,t2);
select * from tm;
drop table tm, t1, t2;
# End of 5.0 tests
#
# Bug #17766: The server accepts to create MERGE tables which cannot work
#
create table t1 (a int) insert_method = last engine = merge;
--error ER_OPEN_AS_READONLY
insert into t1 values (1);
create table t2 (a int) engine = myisam;
alter table t1 union (t2);
insert into t1 values (1);
alter table t1 insert_method = no;
--error ER_OPEN_AS_READONLY
insert into t1 values (1);
drop table t2;
drop table t1;
--echo End of 5.0 tests
......@@ -132,6 +132,10 @@ int ha_myisammrg::close(void)
int ha_myisammrg::write_row(byte * buf)
{
statistic_increment(table->in_use->status_var.ha_write_count,&LOCK_status);
if (file->merge_insert_method == MERGE_INSERT_DISABLED || !file->tables)
return (HA_ERR_TABLE_READONLY);
if (table->timestamp_field_type & TIMESTAMP_AUTO_SET_ON_INSERT)
table->timestamp_field->set_time();
if (table->next_number_field && buf == table->record[0])
......
......@@ -426,6 +426,7 @@ static int ha_init_errors(void)
SETMSG(HA_ERR_NO_CONNECTION, "Could not connect to storage engine");
SETMSG(HA_ERR_TABLE_DEF_CHANGED, ER(ER_TABLE_DEF_CHANGED));
SETMSG(HA_ERR_TABLE_NEEDS_UPGRADE, ER(ER_TABLE_NEEDS_UPGRADE));
SETMSG(HA_ERR_TABLE_READONLY, ER(ER_OPEN_AS_READONLY));
/* Register the error messages for use with my_error(). */
return my_error_register(errmsgs, HA_ERR_FIRST, HA_ERR_LAST);
......@@ -1799,6 +1800,9 @@ void handler::print_error(int error, myf errflag)
case HA_ERR_TABLE_NEEDS_UPGRADE:
textno=ER_TABLE_NEEDS_UPGRADE;
break;
case HA_ERR_TABLE_READONLY:
textno= ER_OPEN_AS_READONLY;
break;
default:
{
/* The error was "unknown" to this function.
......
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