MDEV-13187 incorrect backslash parsing in clients

cover ANSI_QUOTES and NO_BACKSLASH_ESCAPES in mysqltest

2 files changed, 14 insertions, 2 deletions

diff --git a/client/mysql.cc b/client/mysql.cc
index 6a800e407a3..a965ced89c6 100644
--- a/client/mysql.cc
+++ b/client/mysql.cc
@@ -2288,6 +2288,8 @@ static bool add_line(String &buffer, char *line, ulong line_length,
     }
 #endif
     if (!*ml_comment && inchar == '\\' && *in_string != '`' &&
+        !(*in_string == '"' &&
+          (mysql.server_status & SERVER_STATUS_ANSI_QUOTES)) &&
         !(*in_string &&
           (mysql.server_status & SERVER_STATUS_NO_BACKSLASH_ESCAPES)))
     {
diff --git a/client/mysqltest.cc b/client/mysqltest.cc
index ee636c9401d..f5ee94f1839 100644
--- a/client/mysqltest.cc
+++ b/client/mysqltest.cc
@@ -6486,6 +6486,16 @@ my_bool end_of_query(int c)
 }
 
 
+static inline bool is_escape_char(char c, char in_string)
+{
+  if (c != '\\' || in_string == '`') return false;
+  if (!cur_con) return true;
+  uint server_status= cur_con->mysql->server_status;
+  if (server_status & SERVER_STATUS_NO_BACKSLASH_ESCAPES) return false;
+  return !(server_status & SERVER_STATUS_ANSI_QUOTES && in_string == '"');
+}
+
+
 /*
   Read one "line" from the file
 
@@ -6594,7 +6604,7 @@ int read_line(char *buf, int size)
 	  state= R_Q;
 	}
       }
-      have_slash= (c == '\\' && last_quote != '`');
+      have_slash= is_escape_char(c, last_quote);
       break;
 
     case R_COMMENT:
@@ -6664,7 +6674,7 @@ int read_line(char *buf, int size)
     case R_Q:
       if (c == last_quote)
 	state= R_NORMAL;
-      else if (c == '\\' && last_quote != '`')
+      else if (is_escape_char(c, last_quote))
 	state= R_SLASH_IN_Q;
       break;