Feature_check_constraint status variable

mysql-test/r/features.result

@@ -3,6 +3,7 @@ set sql_mode="";
 flush status;
 show status like "feature%";
 Variable_name	Value
+Feature_check_constraint	0
 Feature_delay_key_write	0
 Feature_dynamic_columns	0
 Feature_fulltext	0
@@ -158,3 +159,9 @@ drop table t1;
 show status like "feature_delay_key_write";
 Variable_name	Value
 Feature_delay_key_write	2
+create table t1 (a int check (a > 5));
+create table t2 (b int, constraint foo check (b < 10));
+drop table t1, t2;
+show status like "feature_check_constraint";
+Variable_name	Value
+Feature_check_constraint	2

mysql-test/t/features.test

@@ -130,3 +130,11 @@ insert into t1 values(2);
 drop table t1;
 
 show status like "feature_delay_key_write";
+
+#
+# Feature CHECK CONSTRAINT
+#
+create table t1 (a int check (a > 5));
+create table t2 (b int, constraint foo check (b < 10));
+drop table t1, t2;
+show status like "feature_check_constraint";

sql/mysqld.cc

@@ -530,7 +530,7 @@ ulong extra_max_connections;
 uint max_digest_length= 0;
 ulong slave_retried_transactions;
 ulonglong slave_skipped_errors;
-ulong feature_files_opened_with_delayed_keys;
+ulong feature_files_opened_with_delayed_keys= 0, feature_check_constraint= 0;
 ulonglong denied_connections;
 my_decimal decimal_zero;
 
@@ -8390,6 +8390,7 @@ SHOW_VAR status_vars[]= {
   {"Empty_queries",            (char*) offsetof(STATUS_VAR, empty_queries), SHOW_LONG_STATUS},
   {"Executed_events",          (char*) &executed_events, SHOW_LONG_NOFLUSH },
   {"Executed_triggers",        (char*) offsetof(STATUS_VAR, executed_triggers), SHOW_LONG_STATUS},
+  {"Feature_check_constraint", (char*) &feature_check_constraint, SHOW_LONG },
   {"Feature_delay_key_write",  (char*) &feature_files_opened_with_delayed_keys, SHOW_LONG },
   {"Feature_dynamic_columns",  (char*) offsetof(STATUS_VAR, feature_dynamic_columns), SHOW_LONG_STATUS},
   {"Feature_fulltext",         (char*) offsetof(STATUS_VAR, feature_fulltext), SHOW_LONG_STATUS},

sql/sql_class.h

@@ -823,8 +823,7 @@ typedef struct system_status_var
   Global status variables
 */
 
-extern ulong feature_files_opened_with_delayed_keys;
-
+extern ulong feature_files_opened_with_delayed_keys, feature_check_constraint;
 
 void add_to_status(STATUS_VAR *to_var, STATUS_VAR *from_var);
 

sql/table.cc

@@ -2306,6 +2306,7 @@ int TABLE_SHARE::init_from_binary_frm_image(THD *thd, bool write,
   bitmap_count= 1;
   if (share->table_check_constraints)
   {
+    feature_check_constraint++;
     if (!(share->check_set= (MY_BITMAP*)
           alloc_root(&share->mem_root, sizeof(*share->check_set))))
       goto err;