Bug 38158: mysql client regression, can't read dump files

- Revert the fix for bug 33812
- fixed a win32 warning

client/mysql.cc:
  revert the fix for bug 33812
mysql-test/r/mysql.result:
  revert the fix for bug 33812
mysql-test/t/mysql_delimiter.sql:
  revert the fix for bug 33812
mysys/default.c:
  fixed a win32 warning

1 files changed, 31 insertions, 0 deletions

diff --git a/client/mysql.cc b/client/mysql.cc
index c8d5522628d..9b14f9fb3ef 100644
--- a/client/mysql.cc
+++ b/client/mysql.cc
@@ -2081,6 +2081,37 @@ static bool add_line(String &buffer,char *line,char *in_string,
 	continue;
       }
     }
+    else if (!*ml_comment && !*in_string &&
+             (end_of_line - pos) >= 10 &&
+             !my_strnncoll(charset_info, (uchar*) pos, 10,
+                           (const uchar*) "delimiter ", 10))
+    {
+      // Flush previously accepted characters
+      if (out != line)
+      {
+        buffer.append(line, (uint32) (out - line));
+        out= line;
+      }
+
+      // Flush possible comments in the buffer
+      if (!buffer.is_empty())
+      {
+        if (com_go(&buffer, 0) > 0) // < 0 is not fatal
+          DBUG_RETURN(1);
+        buffer.length(0);
+      }
+
+      /*
+        Delimiter wants the get rest of the given line as argument to
+        allow one to change ';' to ';;' and back
+      */
+      buffer.append(pos);
+      if (com_delimiter(&buffer, pos) > 0)
+        DBUG_RETURN(1);
+
+      buffer.length(0);
+      break;
+    }
     else if (!*ml_comment && !*in_string && is_prefix(pos, delimiter))
     {
       // Found a statement. Continue parsing after the delimiter