MDEV-35006 Using varbinary as vector-storing column results in assertion failures

* hlindexes cannot be extended with pk
* hlindexes cannot be covering

mysql-test/main/vector_innodb.result

@@ -94,3 +94,12 @@ select vec_distance_euclidean(v, x'B047263C9F87233fcfd27e3eae493e3f0329f43e') as
 e
 insert into t values (x'B047263C9F87233fcfd27e3eae493e3f0329f43e');
 drop table t;
+#
+# MDEV-35006 Using varbinary as vector-storing column results in assertion failures
+#
+create table t (pk int primary key, v varbinary(1024) not null, vector key(v)) engine=InnoDB;
+insert into t values (1, x'B047263C9F87233fcfd27e3eae493e3f0329f43e');
+select pk,hex(v) from t;
+pk	hex(v)
+1	B047263C9F87233FCFD27E3EAE493E3F0329F43E
+drop table t;

mysql-test/main/vector_innodb.test

@@ -79,3 +79,11 @@ create table t (v blob not null, vector key(v)) engine=InnoDB;
 select vec_distance_euclidean(v, x'B047263C9F87233fcfd27e3eae493e3f0329f43e') as e from t order by e limit 1;
 insert into t values (x'B047263C9F87233fcfd27e3eae493e3f0329f43e');
 drop table t;
+
+--echo #
+--echo # MDEV-35006 Using varbinary as vector-storing column results in assertion failures
+--echo #
+create table t (pk int primary key, v varbinary(1024) not null, vector key(v)) engine=InnoDB;
+insert into t values (1, x'B047263C9F87233fcfd27e3eae493e3f0329f43e');
+select pk,hex(v) from t;
+drop table t;

sql/table.cc

@@ -3136,8 +3136,8 @@ int TABLE_SHARE::init_from_binary_frm_image(THD *thd, bool write,
       }
  
       key_part= keyinfo->key_part;
-      uint key_parts= share->use_ext_keys ? keyinfo->ext_key_parts :
-	                                    keyinfo->user_defined_key_parts;
+      uint key_parts= share->use_ext_keys && key < share->keys
+                  ? keyinfo->ext_key_parts : keyinfo->user_defined_key_parts;
       if (keyinfo->algorithm == HA_KEY_ALG_LONG_HASH)
         key_parts++;
       if (keyinfo->algorithm == HA_KEY_ALG_UNDEF) // old .frm
@@ -3191,7 +3191,7 @@ int TABLE_SHARE::init_from_binary_frm_image(THD *thd, bool write,
         if (i == 0)
           field->key_start.set_bit(key);
         if (field->key_length() == key_part->length &&
-            !(field->flags & BLOB_FLAG) &&
+            !(field->flags & BLOB_FLAG) && key < share->keys &&
             keyinfo->algorithm != HA_KEY_ALG_LONG_HASH)
         {
           if (handler_file->index_flags(key, i, 0) & HA_KEYREAD_ONLY)