Bug #45236: large blob inserts from mysqldump fail, possible

            memory issue ? 
 
The mysql command line client could misinterpret some character 
sequences as commands under some circumstances. 
 
The upper limit for internal readline buffer was raised to 1 GB 
(the same as for server's max_allowed_packet) so that any input 
line is processed by add_line() as a whole rather than in 
chunks.

client/mysql.cc

@@ -112,7 +112,7 @@ extern "C" {
 #define PROMPT_CHAR '\\'
 #define DEFAULT_DELIMITER ";"
 
-#define MAX_BATCH_BUFFER_SIZE (1024L * 1024L)
+#define MAX_BATCH_BUFFER_SIZE (1024L * 1024L * 1024L)
 
 typedef struct st_status
 {

mysql-test/r/mysql-bug45236.result

+DROP TABLE IF EXISTS t1;
+SET @old_max_allowed_packet= @@global.max_allowed_packet;
+SET @@global.max_allowed_packet = 1024 * 1024 + 1024;
+CREATE TABLE t1(data LONGBLOB);
+INSERT INTO t1 SELECT CONCAT(REPEAT('1', 1024*1024 - 27), 
+"\'\r dummydb dummyhost");
+DROP TABLE t1;
+SET @@global.max_allowed_packet = @old_max_allowed_packet;

mysql-test/t/mysql-bug45236.test

+#
+# Bug #45236: large blob inserts from mysqldump fail, possible memory issue ?
+#
+# This test consumes a significant amount of resources.
+# Therefore it should be kept separated from other tests.
+# Otherwise we might suffer from problems like
+# Bug#43801 mysql.test takes too long, fails due to expired timeout
+#           on debx86-b in PB
+#
+
+--disable_warnings
+DROP TABLE IF EXISTS t1;
+--enable_warnings
+
+# Have to change the global variable as the session variable is
+# read-only.
+SET @old_max_allowed_packet= @@global.max_allowed_packet;
+# ~1 MB blob length + some space for the rest of INSERT query
+SET @@global.max_allowed_packet = 1024 * 1024 + 1024;
+
+# Create a new connection since the global max_allowed_packet
+# has no effect onr the current one
+connect (con1, localhost, root,,);
+
+CREATE TABLE t1(data LONGBLOB);
+INSERT INTO t1 SELECT CONCAT(REPEAT('1', 1024*1024 - 27), 
+                             "\'\r dummydb dummyhost");
+
+let $outfile= $MYSQLTEST_VARDIR/tmp/bug41486.sql;
+--error 0,1
+remove_file $outfile;
+--exec $MYSQL_DUMP --compact -t test t1 > $outfile
+# Check that the mysql client does not interpret the "\r" sequence as a command
+--exec $MYSQL --max_allowed_packet=1M test < $outfile 2>&1
+
+DROP TABLE t1;
+
+# Cleanup
+disconnect con1;
+--source include/wait_until_disconnected.inc
+remove_file $outfile;
+connection default;
+SET @@global.max_allowed_packet = @old_max_allowed_packet;