Bug#34861: mysqldump with --tab gives weird output for triggers.

mysqldump --tab still dumped triggers to stdout rather than to
individual tables.

We now append triggers to the .sql file for the corresponding
table.

--events and --routines correspond to a database rather than a
table and will still go to stdout with --tab unless redirected
with --result-file (-r).

client/mysqldump.c:
  Extend open_sql_file_for_table() so we can open-append.
  Change dump_triggers_for_table() so it will append its
  output to the table's .sql-file when --tab is used.
mysql-test/r/mysqldump.result:
  Show that when using --tab, triggers now end up in the .sql
  file with the corresponding table (after that table), while
  --routines and --events go to stdout or --result-file.
mysql-test/t/mysqldump.test:
  Show that when using --tab, triggers now end up in the .sql
  file with the corresponding table (after that table), while
  --routines and --events go to stdout or --result-file.

client/mysqldump.c

@@ -1397,18 +1397,19 @@ static char *cover_definer_clause_in_sp(const char *def_str,
   SYNOPSIS
     open_sql_file_for_table
     name      name of the table or view
+    flags     flags (as per "man 2 open")
 
   RETURN VALUES
     0        Failed to open file
     > 0      Handle of the open file
 */
-static FILE* open_sql_file_for_table(const char* table)
+static FILE* open_sql_file_for_table(const char* table, int flags)
 {
   FILE* res;
   char filename[FN_REFLEN], tmp_path[FN_REFLEN];
   convert_dirname(tmp_path,path,NullS);
   res= my_fopen(fn_format(filename, table, tmp_path, ".sql", 4),
-                O_WRONLY, MYF(MY_WME));
+                flags, MYF(MY_WME));
   return res;
 }
 
@@ -2290,7 +2291,7 @@ static uint get_table_structure(char *table, char *db, char *table_type,
 
       if (path)
       {
-        if (!(sql_file= open_sql_file_for_table(table)))
+        if (!(sql_file= open_sql_file_for_table(table, O_WRONLY)))
           DBUG_RETURN(0);
 
         write_header(sql_file, db);
@@ -2501,7 +2502,7 @@ static uint get_table_structure(char *table, char *db, char *table_type,
     {
       if (path)
       {
-        if (!(sql_file= open_sql_file_for_table(table)))
+        if (!(sql_file= open_sql_file_for_table(table, O_WRONLY)))
           DBUG_RETURN(0);
         write_header(sql_file, db);
       }
@@ -2725,12 +2726,10 @@ continue_xml:
   DBUG_RETURN((uint) num_fields);
 } /* get_table_structure */
 
-static void dump_trigger_old(MYSQL_RES *show_triggers_rs,
+static void dump_trigger_old(FILE *sql_file, MYSQL_RES *show_triggers_rs,
                              MYSQL_ROW *show_trigger_row,
                              const char *table_name)
 {
-  FILE *sql_file= md_result_file;
-
   char quoted_table_name_buf[NAME_LEN * 2 + 3];
   char *quoted_table_name= quote_name(table_name, quoted_table_name_buf, 1);
 
@@ -2796,11 +2795,10 @@ static void dump_trigger_old(MYSQL_RES *show_triggers_rs,
   DBUG_VOID_RETURN;
 }
 
-static int dump_trigger(MYSQL_RES *show_create_trigger_rs,
+static int dump_trigger(FILE *sql_file, MYSQL_RES *show_create_trigger_rs,
                         const char *db_name,
                         const char *db_cl_name)
 {
-  FILE *sql_file= md_result_file;
   MYSQL_ROW row;
   int db_cl_altered= FALSE;
 
@@ -2864,22 +2862,28 @@ static int dump_triggers_for_table(char *table_name, char *db_name)
   uint       old_opt_compatible_mode= opt_compatible_mode;
   MYSQL_RES  *show_triggers_rs;
   MYSQL_ROW  row;
+  FILE      *sql_file= md_result_file;
 
   char       db_cl_name[MY_CS_NAME_SIZE];
+  int        ret= TRUE;
 
   DBUG_ENTER("dump_triggers_for_table");
   DBUG_PRINT("enter", ("db: %s, table_name: %s", db_name, table_name));
 
+  if (path && !(sql_file= open_sql_file_for_table(table_name,
+                                                  O_WRONLY | O_APPEND)))
+    DBUG_RETURN(1);
+
   /* Do not use ANSI_QUOTES on triggers in dump */
   opt_compatible_mode&= ~MASK_ANSI_QUOTES;
 
   /* Get database collation. */
 
   if (switch_character_set_results(mysql, "binary"))
-    DBUG_RETURN(TRUE);
+    goto done;
 
   if (fetch_db_collation(db_name, db_cl_name, sizeof (db_cl_name)))
-    DBUG_RETURN(TRUE);
+    goto done;
 
   /* Get list of triggers. */
 
@@ -2888,7 +2892,7 @@ static int dump_triggers_for_table(char *table_name, char *db_name)
               quote_for_like(table_name, name_buff));
 
   if (mysql_query_with_error_report(mysql, &show_triggers_rs, query_buff))
-    DBUG_RETURN(TRUE);
+    goto done;
 
   /* Dump triggers. */
 
@@ -2909,17 +2913,15 @@ static int dump_triggers_for_table(char *table_name, char *db_name)
         provide all the necessary information to restore trigger properly.
       */
 
-      dump_trigger_old(show_triggers_rs, &row, table_name);
+      dump_trigger_old(sql_file, show_triggers_rs, &row, table_name);
     }
     else
     {
       MYSQL_RES *show_create_trigger_rs= mysql_store_result(mysql);
 
       if (!show_create_trigger_rs ||
-          dump_trigger(show_create_trigger_rs, db_name, db_cl_name))
-      {
-        DBUG_RETURN(TRUE);
-      }
+          dump_trigger(sql_file, show_create_trigger_rs, db_name, db_cl_name))
+        goto done;
 
       mysql_free_result(show_create_trigger_rs);
     }
@@ -2929,7 +2931,7 @@ static int dump_triggers_for_table(char *table_name, char *db_name)
   mysql_free_result(show_triggers_rs);
 
   if (switch_character_set_results(mysql, default_charset))
-    DBUG_RETURN(TRUE);
+    goto done;
 
   /*
     make sure to set back opt_compatible mode to
@@ -2937,7 +2939,13 @@ static int dump_triggers_for_table(char *table_name, char *db_name)
   */
   opt_compatible_mode=old_opt_compatible_mode;
 
-  DBUG_RETURN(FALSE);
+  ret= FALSE;
+
+done:
+  if (path)
+    my_fclose(sql_file, MYF(0));
+
+  DBUG_RETURN(ret);
 }
 
 static void add_load_option(DYNAMIC_STRING *str, const char *option,
@@ -4782,7 +4790,7 @@ static my_bool get_view_structure(char *table, char* db)
   /* If requested, open separate .sql file for this view */
   if (path)
   {
-    if (!(sql_file= open_sql_file_for_table(table)))
+    if (!(sql_file= open_sql_file_for_table(table, O_WRONLY)))
       DBUG_RETURN(1);
 
     write_header(sql_file, db);

mysql-test/r/mysqldump.result

@@ -4226,6 +4226,57 @@ DROP DATABASE mysqldump_test_db;
 # -- End of test case for Bug#32538.
 
 SET @@GLOBAL.CONCURRENT_INSERT = @OLD_CONCURRENT_INSERT;
+
+Bug #34861 - mysqldump with --tab gives weird output for triggers.
+
+CREATE TABLE t1 (f1 INT);
+CREATE TRIGGER tr1 BEFORE UPDATE ON t1 FOR EACH ROW SET @f1 = 1;
+CREATE PROCEDURE pr1 () SELECT "Meow";
+CREATE EVENT ev1 ON SCHEDULE AT '2030-01-01 00:00:00' DO SELECT "Meow";
+
+SHOW TRIGGERS;
+Trigger	Event	Table	Statement	Timing	Created	sql_mode	Definer	character_set_client	collation_connection	Database Collation
+tr1	UPDATE	t1	SET @f1 = 1	BEFORE	NULL		root@localhost	latin1	latin1_swedish_ci	latin1_swedish_ci
+SHOW EVENTS;
+Db	Name	Definer	Time zone	Type	Execute at	Interval value	Interval field	Starts	Ends	Status	Originator	character_set_client	collation_connection	Database Collation
+test	ev1	root@localhost	SYSTEM	ONE TIME	2030-01-01 00:00:00	NULL	NULL	NULL	NULL	ENABLED	1	latin1	latin1_swedish_ci	latin1_swedish_ci
+SELECT name,body FROM mysql.proc WHERE NAME = 'pr1';
+name	body
+pr1	SELECT "Meow"
+
+dump table; if anything goes to stdout, it ends up here: ---------------
+
+drop everything
+DROP EVENT ev1;
+DROP TRIGGER tr1;
+DROP TABLE t1;
+DROP PROCEDURE pr1;
+
+reload table; this should restore table and trigger
+SHOW TRIGGERS;
+Trigger	Event	Table	Statement	Timing	Created	sql_mode	Definer	character_set_client	collation_connection	Database Collation
+tr1	UPDATE	t1	SET @f1 = 1	BEFORE	NULL		root@localhost	latin1	latin1_swedish_ci	latin1_swedish_ci
+SHOW EVENTS;
+Db	Name	Definer	Time zone	Type	Execute at	Interval value	Interval field	Starts	Ends	Status	Originator	character_set_client	collation_connection	Database Collation
+SELECT name,body FROM mysql.proc WHERE NAME = 'pr1';
+name	body
+
+reload db; this should restore routines and events
+SHOW TRIGGERS;
+Trigger	Event	Table	Statement	Timing	Created	sql_mode	Definer	character_set_client	collation_connection	Database Collation
+tr1	UPDATE	t1	SET @f1 = 1	BEFORE	NULL		root@localhost	latin1	latin1_swedish_ci	latin1_swedish_ci
+SHOW EVENTS;
+Db	Name	Definer	Time zone	Type	Execute at	Interval value	Interval field	Starts	Ends	Status	Originator	character_set_client	collation_connection	Database Collation
+test	ev1	root@localhost	SYSTEM	ONE TIME	2030-01-01 00:00:00	NULL	NULL	NULL	NULL	ENABLED	1	latin1	latin1_swedish_ci	latin1_swedish_ci
+SELECT name,body FROM mysql.proc WHERE NAME = 'pr1';
+name	body
+pr1	SELECT "Meow"
+
+cleanup
+DROP EVENT IF EXISTS ev1;
+DROP PROCEDURE IF EXISTS pr1;
+DROP TRIGGER IF EXISTS tr1;
+DROP TABLE IF EXISTS t1;
 #
 # End of 5.1 tests
 #

mysql-test/t/mysqldump.test

@@ -1953,6 +1953,59 @@ DROP DATABASE mysqldump_test_db;
 SET @@GLOBAL.CONCURRENT_INSERT = @OLD_CONCURRENT_INSERT;
 
 
+###########################################################################
+
+--echo
+--echo Bug #34861 - mysqldump with --tab gives weird output for triggers.
+--echo
+
+CREATE TABLE t1 (f1 INT);
+CREATE TRIGGER tr1 BEFORE UPDATE ON t1 FOR EACH ROW SET @f1 = 1;
+CREATE PROCEDURE pr1 () SELECT "Meow";
+CREATE EVENT ev1 ON SCHEDULE AT '2030-01-01 00:00:00' DO SELECT "Meow";
+
+--echo
+SHOW TRIGGERS;
+SHOW EVENTS;
+SELECT name,body FROM mysql.proc WHERE NAME = 'pr1';
+
+--echo
+--echo dump table; if anything goes to stdout, it ends up here: ---------------
+--exec $MYSQL_DUMP --compact --routines --triggers --events --result-file=$MYSQLTEST_VARDIR/tmp/test_34861.sql --tab=$MYSQLTEST_VARDIR/tmp/ test
+
+--echo
+--echo drop everything
+DROP EVENT ev1;
+DROP TRIGGER tr1;
+DROP TABLE t1;
+DROP PROCEDURE pr1;
+
+--echo
+--echo reload table; this should restore table and trigger
+--exec $MYSQL test < $MYSQLTEST_VARDIR/tmp/t1.sql
+SHOW TRIGGERS;
+SHOW EVENTS;
+SELECT name,body FROM mysql.proc WHERE NAME = 'pr1';
+
+--echo
+--echo reload db; this should restore routines and events
+--exec $MYSQL test < $MYSQLTEST_VARDIR/tmp/test_34861.sql
+SHOW TRIGGERS;
+SHOW EVENTS;
+SELECT name,body FROM mysql.proc WHERE NAME = 'pr1';
+
+--echo
+--echo cleanup
+--remove_file $MYSQLTEST_VARDIR/tmp/t1.txt
+--remove_file $MYSQLTEST_VARDIR/tmp/t1.sql
+--remove_file $MYSQLTEST_VARDIR/tmp/test_34861.sql
+--disable_warnings
+DROP EVENT IF EXISTS ev1;
+DROP PROCEDURE IF EXISTS pr1;
+DROP TRIGGER IF EXISTS tr1;
+DROP TABLE IF EXISTS t1;
+--enable_warnings
+
 ###########################################################################
 
 --echo #