MDEV-20186 Wrong result or Assertion on INSERT after DELETE HISTORY

Fix reinitialize vers_write on table reopen.

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

@@ -118,5 +118,16 @@ with system versioning;
 insert into t1 (f) values ('a'), ('b'), ('c'), ('d'), ('e'), ('f'), ('g'), ('h');
 delete from t1;
 delete history from t1;
+drop table t1;
+#
+# MDEV-20186 Wrong result or Assertion on INSERT after DELETE HISTORY
+#
+create or replace table t1 (a int check (a > 0)) with system versioning;
+delete history from t1;
+insert into t1 values (1);
+select * from t1;
+a
+1
+drop table t1;
 drop database test;
 create database test;

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

@@ -130,6 +130,16 @@ with system versioning;
 insert into t1 (f) values ('a'), ('b'), ('c'), ('d'), ('e'), ('f'), ('g'), ('h');
 delete from t1;
 delete history from t1;
+drop table t1;
+
+--echo #
+--echo # MDEV-20186 Wrong result or Assertion on INSERT after DELETE HISTORY
+--echo #
+create or replace table t1 (a int check (a > 0)) with system versioning;
+delete history from t1;
+insert into t1 values (1);
+select * from t1;
+drop table t1;
 
 drop database test;
 create database test;

sql/table.cc

@@ -4653,6 +4653,7 @@ void TABLE::init(THD *thd, TABLE_LIST *tl)
   created= TRUE;
   cond_selectivity= 1.0;
   cond_selectivity_sampling_explain= NULL;
+  vers_write= s->versioned;
 #ifdef HAVE_REPLICATION
   /* used in RBR Triggers */
   master_had_triggers= 0;