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-rw-r--r--mysql-test/t/processlist.test29
1 files changed, 29 insertions, 0 deletions
diff --git a/mysql-test/t/processlist.test b/mysql-test/t/processlist.test
index 8a8995f43b0..52cb6b31919 100644
--- a/mysql-test/t/processlist.test
+++ b/mysql-test/t/processlist.test
@@ -51,4 +51,33 @@ select command, time < 5 from information_schema.processlist where id != connect
disconnect con1;
set debug_sync='reset';
+--echo #
+--echo # MDEV-20466: SHOW PROCESSLIST truncates query text on \0 bytes
+--echo #
+
+connect (con1,localhost,root,,);
+
+connection con1;
+
+let $q= `select CONCAT("SELECT user FROM mysql.user WHERE user ='some", CHAR(0), "' or sleep (30)")`;
+
+SET DEBUG_SYNC= 'before_join_optimize SIGNAL in_sync';
+--disable_query_log
+--send_eval $q;
+--enable_query_log
+connection default;
+
+SET DEBUG_SYNC= 'now WAIT_FOR in_sync';
+
+exec $MYSQL test -e "SHOW PROCESSLIST" > $MYSQLTEST_VARDIR/tmp/MDEV-20466.text;
+
+let SEARCH_FILE=$MYSQLTEST_VARDIR/tmp/MDEV-20466.text;
+let SEARCH_PATTERN=sleep;
+source include/search_pattern_in_file.inc;
+remove_file $MYSQLTEST_VARDIR/tmp//MDEV-20466.text;
+
+disconnect con1;
+
+SET DEBUG_SYNC = 'RESET';
+
--echo End of 5.5 tests