Its funny, I am reading through the forums and someone asks "Can I please have...

Its funny, I am reading through the forums and someone asks "Can I please have a REPLACE INTO, instead an INSERT INTO?" and I remember how often I have used a sed script to modify MySQL dumps to have exactly that.
So, use --replace and instead of getting INSERT INTO you will INSTEAD get REPLACE INTO. Buyer beward, REPLACE is a MySQL SQL, so you will not end up with a dump that can be used for other databases.

Though I hear you could just use a sed line to modify it back :)


client/client_priv.h:
  New option for --replace
client/mysqldump.c:
  Added option for REPLACE INTO instead of INSERT INTO
mysql-test/r/mysqldump.result:
  Updated REsultes for replace into
mysql-test/t/mysqldump.test:
  Added new test for --replace

client/client_priv.h

@@ -51,5 +51,6 @@ enum options_client
 #endif
   OPT_TRIGGERS,
   OPT_IGNORE_TABLE,OPT_INSERT_IGNORE,OPT_SHOW_WARNINGS,OPT_DROP_DATABASE,
-  OPT_TZ_UTC, OPT_AUTO_CLOSE
+  OPT_TZ_UTC, OPT_AUTO_CLOSE,
+  OPT_MYSQL_REPLACE_INTO
 };

client/mysqldump.c

@@ -92,6 +92,7 @@ static my_bool  verbose=0,tFlag=0,dFlag=0,quick= 1, extended_insert= 1,
 		opt_single_transaction=0, opt_comments= 0, opt_compact= 0,
 		opt_hex_blob=0, opt_order_by_primary=0, opt_ignore=0,
                 opt_complete_insert= 0, opt_drop_database= 0,
+                opt_replace_into= 0,
                 opt_dump_triggers= 0, opt_routines=0, opt_tz_utc=1;
 static ulong opt_max_allowed_packet, opt_net_buffer_length;
 static MYSQL mysql_connection,*sock=0;
@@ -339,6 +340,9 @@ static struct my_option my_long_options[] =
   {"quote-names",'Q', "Quote table and column names with backticks (`).",
    (gptr*) &opt_quoted, (gptr*) &opt_quoted, 0, GET_BOOL, NO_ARG, 1, 0, 0, 0,
    0, 0},
+  {"replace-names", OPT_MYSQL_REPLACE_INTO, "Use REPLACE INTO instead of INSERT INTO.",
+   (gptr*) &opt_replace_into, (gptr*) &opt_replace_into, 0, GET_BOOL, NO_ARG, 0, 0, 0, 0,
+   0, 0},
   {"result-file", 'r',
    "Direct output to a given file. This option should be used in MSDOS, because it prevents new line '\\n' from being converted to '\\r\\n' (carriage return + line feed).",
    0, 0, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
@@ -1515,6 +1519,9 @@ static uint get_table_structure(char *table, char *db, char *table_type,
     */
     if (write_data)
     {
+      if (opt_replace_into)
+        dynstr_append_mem(&insert_pat, "REPLACE ", 8);
+      else
         dynstr_append_mem(&insert_pat, "INSERT ", 7);
       dynstr_append(&insert_pat, insert_option);
       dynstr_append_mem(&insert_pat, "INTO ", 5);
@@ -1592,6 +1599,9 @@ static uint get_table_structure(char *table, char *db, char *table_type,
 
     if (write_data)
     {
+      if (opt_replace_into)
+        dynstr_append_mem(&insert_pat, "REPLACE ", 8);
+      else
         dynstr_append_mem(&insert_pat, "INSERT ", 7);
       dynstr_append(&insert_pat, insert_option);
       dynstr_append_mem(&insert_pat, "INTO ", 5);

mysql-test/r/mysqldump.result

@@ -2494,3 +2494,42 @@ drop view v2;
 drop view v0;
 drop view v1;
 drop table t1;
+drop table if exists t1;
+CREATE TABLE t1(a int, b int);
+INSERT INTO t1 VALUES (1,1);
+INSERT INTO t1 VALUES (2,3);
+INSERT INTO t1 VALUES (3,4), (4,5);
+
+/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
+/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
+/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
+/*!40101 SET NAMES utf8 */;
+/*!40103 SET @OLD_TIME_ZONE=@@TIME_ZONE */;
+/*!40103 SET TIME_ZONE='+00:00' */;
+/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
+/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
+/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
+/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;
+DROP TABLE IF EXISTS `t1`;
+CREATE TABLE `t1` (
+  `a` int(11) default NULL,
+  `b` int(11) default NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1;
+
+
+/*!40000 ALTER TABLE `t1` DISABLE KEYS */;
+LOCK TABLES `t1` WRITE;
+REPLACE INTO `t1` VALUES (1,1),(2,3),(3,4),(4,5);
+UNLOCK TABLES;
+/*!40000 ALTER TABLE `t1` ENABLE KEYS */;
+/*!40103 SET TIME_ZONE=@OLD_TIME_ZONE */;
+
+/*!40101 SET SQL_MODE=@OLD_SQL_MODE */;
+/*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */;
+/*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */;
+/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;
+/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;
+/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;
+/*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;
+
+DROP TABLE t1;

mysql-test/t/mysqldump.test

@@ -994,8 +994,20 @@ create view v2 as select * from v0;
 
 select * from v2;
 --exec $MYSQL_DUMP -x --skip-comments --databases test
-
 drop view v2;
 drop view v0;
 drop view v1;
 drop table t1;
+
+# Check new --replace option
+
+--disable_warnings
+drop table if exists t1;
+--enable_warnings
+
+CREATE TABLE t1(a int, b int);
+INSERT INTO t1 VALUES (1,1);
+INSERT INTO t1 VALUES (2,3);
+INSERT INTO t1 VALUES (3,4), (4,5);
+--exec $MYSQL_DUMP --replace --skip-comments test t1
+DROP TABLE t1;