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Bug#30384: Having SQL_BUFFER_RESULT option in the CREATE .. KEY(..) .. SELECT

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led to creating corrupted index.

While execution of the  CREATE .. SELECT SQL_BUFFER_RESULT statement the 
engine->start_bulk_insert function was called twice. On the first call
On the first call MyISAM disabled all non-unique indexes and on the second
call it decides to not re-enable them because all indexes was disabled.
Due to this no indexes was actually created during CREATE TABLE thus
producing crashed table.

Now the select_inset class has is_bulk_insert_mode flag which prevents
calling the start_bulk_insert function twice.
The flag is set in the select_create::prepare, select_insert::prepare2
functions and the select_insert class constructor.
The flag is reset in the select_insert::send_eof function.
This commit is contained in:
evgen@sunlight.local
2007-09-21 12:09:00 +04:00
parent 4ffcc4f266
commit bb5cdfb87e
4 changed files with 35 additions and 3 deletions
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12
mysql-test/r/insert_select.result
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@ -830,3 +830,15 @@ id prev_id join_id
3 2 0
4 3 0
DROP TABLE t1,t2;
#
# Bug#30384: Having SQL_BUFFER_RESULT option in the
# CREATE .. KEY(..) .. SELECT led to creating corrupted index.
#
create table t1(f1 int);
insert into t1 values(1),(2),(3);
create table t2 (key(f1)) engine=myisam select sql_buffer_result f1 from t1;
check table t2 extended;
Table Op Msg_type Msg_text
test.t2 check status OK
drop table t1,t2;
##################################################################