From fb33da5f569bd3fac9d658ba5eaaeeab285c7085 Mon Sep 17 00:00:00 2001
From: unknown <bar@mysql.com>
Date: Wed, 24 Jan 2007 16:37:38 +0400
Subject: [PATCH] Bug#25815 Data truncated for column TEXT Problem: "Data
 truncated" warning was incorrectly generated when storing a Japanese
 character encoded in utf8 into a cp932 column. Reason: Incorrect wrong
 warning condition compared the original length of the character in bytes
 (which is 3 in utf8) to the converted length of the character in bytes (which
 is 2 in cp932). Fix: use "how many bytes were scanned from input" instead of
 "how many bytes were put to the column" in the condition.

mysql-test/r/ctype_cp932.result:
  Adding test case
mysql-test/t/ctype_cp932.test:
  Adding test case
sql/field.cc:
  Change warning condition from:
  "if number of bytes written to destination is less than full source length"
  to
  "if number of bytes read from source is less than full source length"
---
 mysql-test/r/ctype_cp932.result | 12 ++++++++++++
 mysql-test/t/ctype_cp932.test   | 11 +++++++++++
 sql/field.cc                    |  2 +-
 3 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/mysql-test/r/ctype_cp932.result b/mysql-test/r/ctype_cp932.result
index ed57b87c1ba..10451686e2c 100755
--- a/mysql-test/r/ctype_cp932.result
+++ b/mysql-test/r/ctype_cp932.result
@@ -11353,3 +11353,15 @@ a
 a
 a
 drop table t1;
+set names utf8;
+create table t1 (a text) default character set cp932;
+insert into t1 values (_utf8 0xE38182);
+show warnings;
+Level	Code	Message
+select * from t1;
+a
+あ
+select hex(a) from t1;
+hex(a)
+82A0
+drop table t1;
diff --git a/mysql-test/t/ctype_cp932.test b/mysql-test/t/ctype_cp932.test
index 688d06c4dde..c6196b928b0 100644
--- a/mysql-test/t/ctype_cp932.test
+++ b/mysql-test/t/ctype_cp932.test
@@ -413,3 +413,14 @@ select * from t1;
 insert into t1 values ('abc');
 select * from t1;
 drop table t1;
+
+#
+# Bug#25815 Data truncated for column TEXT
+#
+set names utf8;
+create table t1 (a text) default character set cp932;
+insert into t1 values (_utf8 0xE38182);
+show warnings;
+select * from t1;
+select hex(a) from t1;
+drop table t1;
diff --git a/sql/field.cc b/sql/field.cc
index 257c7846468..61a687567fc 100644
--- a/sql/field.cc
+++ b/sql/field.cc
@@ -7024,7 +7024,7 @@ int Field_blob::store(const char *from,uint length,CHARSET_INFO *cs)
                               cannot_convert_error_pos, from + length))
     return 2;
 
-  if (copy_length < length)
+  if (from_end_pos < from + length)
   {
     report_data_too_long(this);
     return 2;