Fix Bug#14672 Bug in deletion

mysql-test/r/csv.result:
  correct result file
mysql-test/t/csv.test:
  Add test for a bug
sql/examples/ha_tina.cc:
  Add O_APPEND flag to my_open. We should always add rows to the end of file

mysql-test/r/csv.result

@@ -4949,3 +4949,30 @@ val
 6
 6
 DROP TABLE bug13894;
+DROP TABLE IF EXISTS bug14672;
+CREATE TABLE bug14672 (c1 integer) engine = CSV;
+INSERT INTO bug14672 VALUES (1), (2), (3);
+SELECT * FROM bug14672;
+c1
+1
+2
+3
+DELETE FROM bug14672 WHERE c1 = 2;
+SELECT * FROM bug14672;
+c1
+1
+3
+INSERT INTO bug14672 VALUES (4);
+SELECT * FROM bug14672;
+c1
+1
+3
+4
+INSERT INTO bug14672 VALUES (5);
+SELECT * FROM bug14672;
+c1
+1
+3
+4
+5
+DROP TABLE bug14672;

mysql-test/t/csv.test

@@ -1332,4 +1332,23 @@ UPDATE  bug13894 SET val=6 WHERE val=10;
 SELECT * FROM bug13894;
 DROP TABLE bug13894;
 
+#
+# Bug #14672    Bug in deletion
+#
+
+--disable_warnings
+DROP TABLE IF EXISTS bug14672;
+--enable_warnings
+
+CREATE TABLE bug14672 (c1 integer) engine = CSV;   
+INSERT INTO bug14672 VALUES (1), (2), (3);
+SELECT * FROM bug14672;  
+DELETE FROM bug14672 WHERE c1 = 2;   
+SELECT * FROM bug14672;  
+INSERT INTO bug14672 VALUES (4);   
+SELECT * FROM bug14672;  
+INSERT INTO bug14672 VALUES (5);   
+SELECT * FROM bug14672;  
+DROP TABLE bug14672;
+
 # End of 4.1 tests

sql/examples/ha_tina.cc

@@ -166,7 +166,8 @@ static TINA_SHARE *get_share(const char *table_name, TABLE *table)
     thr_lock_init(&share->lock);
     pthread_mutex_init(&share->mutex,MY_MUTEX_INIT_FAST);
 
-    if ((share->data_file= my_open(data_file_name, O_RDWR, MYF(0))) == -1)
+    if ((share->data_file= my_open(data_file_name, O_RDWR|O_APPEND,
+                                   MYF(0))) == -1)
       goto error2;
 
     /* We only use share->data_file for writing, so we scan to the end to append */