This patch removes unnecessary lock from the supremum record, takes

X-locks on duplicates also on LOAD DATA...REPLACE clause and
fixes a bug #6086 adding --disable_warnings and --enable_warnings around
the create table clauses in ctype_utf8 tests for InnoDB.


innobase/dict/dict0dict.c:
  Remove static.
innobase/include/dict0dict.h:
  Add prototype for a function dict_scan_to
innobase/row/row0ins.c:
  Add support for a LOAD DATA INFILE 'xxx' REPLACE INTO TABLE x. We should
  take X-locks on both REPLACE and LOAD DATA...REPLACE queries to duplicate
  records.
innobase/row/row0sel.c:
  If innodb_locks_unsafe_for_binlog options is used we do not lock
  gaps. Supremum record is really a dummy record i.e. gap, therefore 
  we do set locks there.
mysql-test/t/ctype_utf8.test:
  Fix bug #6086: Add --disable_warnings and --enable_warnings around the 
  create table where engine=innodb.

innobase/dict/dict0dict.c

@@ -2244,7 +2244,7 @@ dict_foreign_add_to_cache(
 Scans from pointer onwards. Stops if is at the start of a copy of
 'string' where characters are compared without case sensitivity. Stops
 also at '\0'. */
-static
+
 const char*
 dict_scan_to(
 /*=========*/

innobase/include/dict0dict.h

@@ -891,6 +891,18 @@ dict_tables_have_same_db(
 	const char*	name2);	/* in: table name in the form
 				dbname '/' tablename */
 
+/*************************************************************************
+Scans from pointer onwards. Stops if is at the start of a copy of
+'string' where characters are compared without case sensitivity. Stops
+also at '\0'. */
+
+const char*
+dict_scan_to(
+/*=========*/
+				/* out: scanned up to this */
+	const char*	ptr,	/* in: scan from */
+	const char*	string);/* in: look for this */
+
 /* Buffers for storing detailed information about the latest foreign key
 and unique key errors */
 extern FILE*	dict_foreign_err_file;

innobase/row/row0ins.c

@@ -1482,9 +1482,9 @@ row_ins_scan_sec_index_for_duplicate(
 	ulint		err		= DB_SUCCESS;
 	ibool		moved;
 	mtr_t		mtr;
-        trx_t           *trx;
-        ibool           success;
-
+	trx_t*		trx;
+	const char*	ptr;
+	
 	n_unique = dict_index_get_n_unique(index);
 
 	/* If the secondary index is unique, but one of the fields in the
@@ -1523,9 +1523,11 @@ row_ins_scan_sec_index_for_duplicate(
 
 		trx = thr_get_trx(thr);      
 		ut_ad(trx);
-		dict_accept(*trx->mysql_query_str, "REPLACE", &success);
 
-		if (success) {
+		ptr = dict_scan_to(*(trx->mysql_query_str),
+				   "REPLACE");
+		
+		if ( ptr && *ptr != '\0') {
 
 			/* The manual defines the REPLACE semantics that it 
 			is either an INSERT or DELETE(s) for duplicate key
@@ -1605,7 +1607,7 @@ row_ins_duplicate_error_in_clust(
 	page_t*	page;
 	ulint	n_unique;
 	trx_t*	trx	= thr_get_trx(thr);
-        ibool   success;
+	const char*	ptr;
 
 	UT_NOT_USED(mtr);
 	
@@ -1639,10 +1641,9 @@ row_ins_duplicate_error_in_clust(
 			sure that in roll-forward we get the same duplicate
 			errors as in original execution */
 
-			dict_accept(*trx->mysql_query_str, "REPLACE", 
-				    &success);
+			ptr = dict_scan_to(*(trx->mysql_query_str), "REPLACE");
 
-			if (success) {
+			if (ptr && *ptr != '\0') {
 
 				/* The manual defines the REPLACE semantics 
 				that it is either an INSERT or DELETE(s) 
@@ -1683,15 +1684,11 @@ row_ins_duplicate_error_in_clust(
 			/* The manual defines the REPLACE semantics that it 
 			is either an INSERT or DELETE(s) for duplicate key
 			+ INSERT. Therefore, we should take X-lock for
-			duplicates.
-		        */
+			duplicates. */
 
-			/* Is the first word in MySQL query REPLACE ? */
-
-		 	dict_accept(*trx->mysql_query_str, "REPLACE", 
-				    &success);
-
-			if (success) {
+			ptr = dict_scan_to(*(trx->mysql_query_str), "REPLACE");
+			
+			if (ptr && *ptr != '\0') {
 
 				err = row_ins_set_exclusive_rec_lock(
 						LOCK_REC_NOT_GAP,

innobase/row/row0sel.c

@@ -2794,7 +2794,7 @@ row_search_for_mysql(
 	rec_t*		index_rec;
 	rec_t*		clust_rec;
 	rec_t*		old_vers;
-	ulint		err;
+	ulint		err             = DB_SUCCESS;
 	ibool		moved;
 	ibool		cons_read_requires_clust_rec;
 	ibool		was_lock_wait;
@@ -3203,26 +3203,20 @@ row_search_for_mysql(
 		if (prebuilt->select_lock_type != LOCK_NONE
 		    && set_also_gap_locks) {
 
-			/* Try to place a lock on the index record */	
+			/* Try to place a lock on the index record */
 
-                        /* If innodb_locks_unsafe_for_binlog option is used, 
-                           we lock only the record, i.e. next-key locking is
-                           not used.
-	                */
-	                if ( srv_locks_unsafe_for_binlog )
-	                {
-			    err = sel_set_rec_lock(rec, index,
-						prebuilt->select_lock_type,
-						LOCK_REC_NOT_GAP, thr);
-			}
-			else
+			/* If innodb_locks_unsafe_for_binlog option is used,
+			we do not lock gaps. Supremum record is really
+			a gap and therefore we do not set locks there. */
+			
+			if ( srv_locks_unsafe_for_binlog == FALSE )
 			{
-			    err = sel_set_rec_lock(rec, index,
+				err = sel_set_rec_lock(rec, index,
 						prebuilt->select_lock_type,
 						LOCK_ORDINARY, thr);
 			}
-			
-                        if (err != DB_SUCCESS) {
+
+			if (err != DB_SUCCESS) {
 
 				goto lock_wait_or_error;
 			}

mysql-test/t/ctype_utf8.test

@@ -221,7 +221,9 @@ drop table t1;
 # Bug 4521: unique key prefix interacts poorly with utf8
 # InnoDB: keys with prefix compression, case insensitive collation.
 #
+--disable_warnings
 create table t1 (c varchar(30) character set utf8, unique(c(10))) engine=innodb;
+--enable_warnings
 insert into t1 values ('1'),('2'),('3'),('x'),('y'),('z');
 insert into t1 values ('aaaaaaaaaa');
 --error 1062
@@ -269,7 +271,9 @@ drop table t1;
 # Bug 4521: unique key prefix interacts poorly with utf8
 # InnoDB: fixed length keys, case insensitive collation
 #
+--disable_warnings
 create table t1 (c char(3) character set utf8, unique (c(2))) engine=innodb;
+--enable_warnings
 insert into t1 values ('1'),('2'),('3'),('4'),('x'),('y'),('z');
 insert into t1 values ('a');
 insert into t1 values ('aa');
@@ -504,10 +508,12 @@ drop table t1;
 # Bug#4594: column index make = failed for gbk, but like works
 # Check InnoDB
 #
+--disable_warnings
 create table t1 (
   str varchar(255) character set utf8 not null,
   key str  (str(2))
 ) engine=innodb;
+--enable_warnings
 INSERT INTO t1 VALUES ('str');
 INSERT INTO t1 VALUES ('str2');
 select * from t1 where str='str';
@@ -562,11 +568,13 @@ DROP TABLE t1;
 #
 # Bug #5723: length(<varchar utf8 field>) returns varying results
 #
+--disable_warnings
 SET NAMES utf8;
 CREATE TABLE t1 (
   subject varchar(255) character set utf8 collate utf8_unicode_ci,
   p varchar(15) character set utf8
 ) ENGINE=InnoDB DEFAULT CHARSET=latin1;
+--enable_warnings
 INSERT INTO t1 VALUES ('谷川俊二と申しますが、インターネット予約の会員登録をしましたところ、メールアドレスを間違えてしまい会員ＩＤが受け取ることが出来ませんでした。間違えアドレスはtani-shun@n.vodafone.ne.jpを書き込みました。どうすればよいですか？ その他、住所等は間違えありません。連絡ください。よろしくお願いします。m(__)m','040312-000057');
 INSERT INTO t1 VALUES ('aaa','bbb');
 SELECT length(subject) FROM t1;