MDEV-15062 Information Schema COLUMNS Table does not show system vers…

…ioning information

get_schema_column_record(): print 'WITHOUT SYSTEM VERSIONING` in 'EXTRA'
for such fields

mysql-test/suite/versioning/r/optimized.result

@@ -61,4 +61,15 @@ a	b
 3	4
 select * from t for system_time as of timestamp now(6) where b is NULL;
 a	b
+create or replace table t (x int with system versioning, y int);
+select column_name, extra from information_schema.columns where table_name='t';
+column_name	extra
+x	
+y	WITHOUT SYSTEM VERSIONING
+show create table t;
+Table	Create Table
+t	CREATE TABLE `t` (
+  `x` int(11) DEFAULT NULL,
+  `y` int(11) DEFAULT NULL WITHOUT SYSTEM VERSIONING
+) ENGINE=MyISAM DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
 drop table t;

mysql-test/suite/versioning/t/optimized.test

@@ -30,4 +30,11 @@ insert into t values (1, 2), (3, 4);
 select * from t for system_time as of timestamp now(6);
 select * from t for system_time as of timestamp now(6) where b is NULL;
 
+#
+# MDEV-15062 Information Schema COLUMNS Table does not show system versioning information
+#
+create or replace table t (x int with system versioning, y int);
+select column_name, extra from information_schema.columns where table_name='t';
+show create table t;
+
 drop table t;

sql/sql_show.cc

@@ -6000,6 +6000,12 @@ static int get_schema_column_record(THD *thd, TABLE_LIST *tables,
         buf.append(STRING_WITH_LEN(", "));
       buf.append(STRING_WITH_LEN("INVISIBLE"),cs);
     }
+    if (field->vers_update_unversioned())
+    {
+      if (buf.length())
+        buf.append(STRING_WITH_LEN(", "));
+      buf.append(STRING_WITH_LEN("WITHOUT SYSTEM VERSIONING"), cs);
+    }
     table->field[17]->store(buf.ptr(), buf.length(), cs);
     table->field[19]->store(field->comment.str, field->comment.length, cs);
     if (schema_table_store_record(thd, table))