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Change of internal key_field=NULL handling to avoid error messages.

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Optimized SELECT DISTINCT ... ORDER BY ... LIMIT
Fixed reference to uninitalized variable
This commit is contained in:
monty@hundin.mysql.fi
2002-12-03 13:08:25 +02:00
parent ce56f927fa
commit 8830eb4aa9
25 changed files with 315 additions and 119 deletions
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17
sql/sql_class.cc
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@ -158,9 +158,8 @@ THD::THD():user_time(0),fatal_error(0),last_insert_id_used(0),
{
pthread_mutex_lock(&LOCK_thread_count);
ulong tmp=(ulong) (rnd(&sql_rand) * 3000000);
randominit(&rand, tmp + (ulong) start_time,
tmp + (ulong) thread_id);
pthread_mutex_unlock(&LOCK_thread_count);
randominit(&rand, tmp + (ulong) start_time, tmp + (ulong) thread_id);
}
}
@ -171,16 +170,16 @@ THD::THD():user_time(0),fatal_error(0),last_insert_id_used(0),
void THD::init(void)
{
server_status= SERVER_STATUS_AUTOCOMMIT;
update_lock_default= (variables.low_priority_updates ?
TL_WRITE_LOW_PRIORITY :
TL_WRITE);
options= thd_startup_options;
sql_mode=(uint) opt_sql_mode;
open_options=ha_open_options;
pthread_mutex_lock(&LOCK_global_system_variables);
variables= global_system_variables;
pthread_mutex_unlock(&LOCK_global_system_variables);
server_status= SERVER_STATUS_AUTOCOMMIT;
options= thd_startup_options;
sql_mode=(uint) opt_sql_mode;
open_options=ha_open_options;
update_lock_default= (variables.low_priority_updates ?
TL_WRITE_LOW_PRIORITY :
TL_WRITE);
session_tx_isolation= (enum_tx_isolation) variables.tx_isolation;
}