bk commit into 5.1 tree (sergefp:1.1974) BUG#15871

[Sergey Petrunia]

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ChangeSet
  1.1974 05/12/21 11:47:48 sergefp@stripped +1 -0
  BUG#15871: For SQL Syntax prepared statemets, set
Item_param::cs_info.character_set_client
  to NULL, as it is checked.

  sql/item.cc
    1.162 05/12/21 11:47:40 sergefp@stripped +3 -1
    BUG#15871: Item_param::query_val_str() checks the
Item_param::cs_info.character_set_client,
    but it was not defined for SQL syntax prepared statements. To avoid comparison with 
    uninitialized data, set character_set_client to NULL for SQL syntax PSes, and modify
the 
    check accordingly.

# This is a BitKeeper patch.  What follows are the unified diffs for the
# set of deltas contained in the patch.  The rest of the patch, the part
# that BitKeeper cares about, is below these diffs.
# User:	sergefp
# Host:	newbox.mylan
# Root:	/home/psergey/mysql-5.1-ppruning-merge

--- 1.161/sql/item.cc	2005-12-12 22:55:12 +03:00
+++ 1.162/sql/item.cc	2005-12-21 11:47:40 +03:00
@@ -2335,6 +2335,7 @@
       CHARSET_INFO *tocs= thd->variables.collation_connection;
       uint32 dummy_offset;
 
+      value.cs_info.character_set_client= NULL;
       value.cs_info.character_set_of_placeholder= fromcs;
       /*
         Setup source and destination character sets so that they
@@ -2653,7 +2654,8 @@
 
       buf= str->c_ptr_quick();
       ptr= buf;
-      if (value.cs_info.character_set_client->escape_with_backslash_is_dangerous)
+      if (value.cs_info.character_set_client && 
+          value.cs_info.character_set_client->escape_with_backslash_is_dangerous)
       {
         ptr= str_to_hex(ptr, str_value.ptr(), str_value.length());
       }