lower_case_table_names=2 (Keep case for table names) was not honored

with ALTER TABLE and CREATE/DROP INDEX. (Bug #3109)
Make net_buffer_length visible for mysql clients (Bug #4206)

include/mysql.h

@@ -250,7 +250,7 @@ typedef struct st_mysql_parameters
   unsigned long *p_net_buffer_length;
 } MYSQL_PARAMETERS;
 
-#if !defined(MYSQL_CLIENT) && !defined(MYSQL_SERVER) && !defined(EMBEDDED_LIBRARY)
+#if !defined(MYSQL_SERVER) && !defined(EMBEDDED_LIBRARY)
 #define max_allowed_packet (*mysql_get_parameters()->p_max_allowed_packet)
 #define net_buffer_length (*mysql_get_parameters()->p_net_buffer_length)
 #endif

libmysql/libmysql.c

@@ -59,6 +59,8 @@
 #define INADDR_NONE	-1
 #endif
 
+#undef net_buffer_length
+#undef max_allowed_packet
 static my_bool	mysql_client_init=0;
 uint		mysql_port=0;
 my_string	mysql_unix_port=0;

mysql-test/mysql-test-run.sh

@@ -668,7 +668,7 @@ report_stats () {
     #
     $RM -f $MY_LOG_DIR/warnings $MY_LOG_DIR/warnings.tmp
     # Remove some non fatal warnings from the log files
-    $SED -e 's!Warning:  Table:.* on delete!!g' \
+    $SED -e 's!Warning:  Table:.* on delete!!g' -e 's!Warning: Setting lower_case_table_names=2!!g' -e 's!Warning: One can only use the --user.*root!!g' \
          $MY_LOG_DIR/*.err > $MY_LOG_DIR/warnings.tmp
 
     found_error=0

mysql-test/r/lowercase_table2.result

@@ -121,3 +121,13 @@ LOCATION
 Mic-5
 Mic-6
 drop table T1;
+create table T1 (A int);
+alter table T1 add index (A);
+show tables like 'T1%';
+Tables_in_test (T1%)
+T1
+alter table t1 add index (A);
+show tables like 't1%';
+Tables_in_test (t1%)
+t1
+drop table t1;

mysql-test/t/lowercase_table2.test

@@ -89,3 +89,14 @@ SELECT LOCATION FROM T1 WHERE EVENT_ID=2 UNION ALL  SELECT LOCATION FROM T1 WHER
 SELECT LOCATION FROM T1 WHERE EVENT_ID=2 UNION ALL  SELECT LOCATION FROM T1 WHERE EVENT_ID=3;
 SELECT LOCATION FROM T1 WHERE EVENT_ID=2 UNION ALL  SELECT LOCATION FROM T1 WHERE EVENT_ID=3;
 drop table T1;
+
+#
+# Test name conversion with ALTER TABLE / CREATE INDEX (Bug #3109)
+#
+
+create table T1 (A int);
+alter table T1 add index (A);
+show tables like 'T1%';
+alter table t1 add index (A);
+show tables like 't1%';
+drop table t1;

scripts/mysql_install_db.sh

@@ -342,7 +342,7 @@ fi
 echo "Installing all prepared tables"
 if eval "$mysqld $defaults $mysqld_opt --bootstrap --skip-grant-tables \
          --basedir=$basedir --datadir=$ldata --skip-innodb --skip-bdb \
-         $extra_arg $args" << END_OF_DATA
+         $args" << END_OF_DATA
 use mysql;
 $c_d
 $i_d

sql/sql_table.cc

@@ -1545,7 +1545,10 @@ int mysql_alter_table(THD *thd,char *new_db, char *new_name,
     }
   }
   else
-    new_alias= new_name= table_name;
+  {
+    new_alias= (lower_case_table_names == 2) ? alias : table_name;
+    new_name= table_name;
+  }
 
   old_db_type=table->db_type;
   if (create_info->db_type == DB_TYPE_DEFAULT)