From d9bddf13418aecd95ff3c47b25bd42e94bc46138 Mon Sep 17 00:00:00 2001
From: Rich Prohaska <prohaska@tokutek.com>
Date: Fri, 25 Apr 2014 14:26:29 -0400
Subject: #209 add tokudb_open_table_check_empty session variable to
 enable/disable may_table_be_open

---
 storage/tokudb/ha_tokudb.cc   | 2 +-
 storage/tokudb/hatoku_hton.cc | 1 +
 storage/tokudb/hatoku_hton.h  | 2 ++
 3 files changed, 4 insertions(+), 1 deletion(-)

(limited to 'storage')

diff --git a/storage/tokudb/ha_tokudb.cc b/storage/tokudb/ha_tokudb.cc
index 19ee41fc4dd..27485ab121c 100644
--- a/storage/tokudb/ha_tokudb.cc
+++ b/storage/tokudb/ha_tokudb.cc
@@ -1732,7 +1732,7 @@ int ha_tokudb::initialize_share(
         init_auto_increment();
     }
 
-    if (may_table_be_empty(txn)) {
+    if (THDVAR(thd, open_table_check_empty) && may_table_be_empty(txn)) {
         share->try_table_lock = true;
     }
     else {
diff --git a/storage/tokudb/hatoku_hton.cc b/storage/tokudb/hatoku_hton.cc
index f91cbeb302f..fcfdc5e419f 100644
--- a/storage/tokudb/hatoku_hton.cc
+++ b/storage/tokudb/hatoku_hton.cc
@@ -1394,6 +1394,7 @@ static struct st_mysql_sys_var *tokudb_system_variables[] = {
     MYSQL_SYSVAR(loader_memory_size),
     MYSQL_SYSVAR(hide_default_row_format),
     MYSQL_SYSVAR(killed_time),
+    MYSQL_SYSVAR(open_table_check_empty),
     NULL
 };
 
diff --git a/storage/tokudb/hatoku_hton.h b/storage/tokudb/hatoku_hton.h
index b2e5c6eeb9c..2163775f0b1 100644
--- a/storage/tokudb/hatoku_hton.h
+++ b/storage/tokudb/hatoku_hton.h
@@ -484,6 +484,8 @@ static int tokudb_killed_callback(void) {
     return thd->killed;
 }
 
+static MYSQL_THDVAR_BOOL(open_table_check_empty, 0, "Check if table is empty at first open", NULL /*check*/, NULL /*update*/, true /*default*/);
+
 extern HASH tokudb_open_tables;
 extern pthread_mutex_t tokudb_mutex;
 extern uint32_t tokudb_write_status_frequency;
-- 
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