bk commit into 5.1 tree (mattiasj:1.2568) BUG#30695

[mattiasj]

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ChangeSet@stripped, 2007-10-10 09:01:57+02:00, mattiasj@mattiasj-laptop.(none) +3 -0
  Bug #30695: An apostrophe ' in the comment of the ADD PARTITION
    causes the Server to crash.
  
  Crashed because of the comment in the partition clause was saved in
  the frm file without escaping, causing the server to crash when it was
  read/parsed again.
  
  Fixed by escaping quoted text in the partition info when writing it to
  the frm-file
  
  NOTE: If the comment is written by an earlier version of the server,
  it will still crash.
  Instead of adding code to allways handle this,
  it would be better to drop the table and recreate it.
  (If needed, edit the frm-file manually and
  replace the apostrophe within the comment with a space)

  mysql-test/r/partition.result@stripped, 2007-10-10 09:01:55+02:00,
mattiasj@mattiasj-laptop.(none) +17 -0
    bug #30695: An apostrophe ' in the comment of the ADD PARTITION causes
    the Server to crash.
     testresult

  mysql-test/t/partition.test@stripped, 2007-10-10 09:01:55+02:00,
mattiasj@mattiasj-laptop.(none) +24 -0
    bug #30695: An apostrophe ' in the comment of the ADD PARTITION causes
    the Server to crash.
      testcase

  sql/sql_partition.cc@stripped, 2007-10-10 09:01:55+02:00, mattiasj@mattiasj-laptop.(none)
+17 -4
    Bug #30695: An apostrophe ' in the comment of the ADD PARTITION causes
      the Server to crash.
    
      Crashes when there is an non escaped apostrophe in the partition comment
    
      fixed by escaping quoted text before writing to the frm-file

diff -Nrup a/mysql-test/r/partition.result b/mysql-test/r/partition.result
--- a/mysql-test/r/partition.result	2007-07-02 20:11:52 +02:00
+++ b/mysql-test/r/partition.result	2007-10-10 09:01:55 +02:00
@@ -1,4 +1,21 @@
 drop table if exists t1;
+CREATE TABLE t1 (
+d DATE NOT NULL
+)
+PARTITION BY RANGE( YEAR(d) ) (
+PARTITION p0 VALUES LESS THAN (1960),
+PARTITION p1 VALUES LESS THAN (1970),
+PARTITION p2 VALUES LESS THAN (1980),
+PARTITION p3 VALUES LESS THAN (1990)
+);
+ALTER TABLE t1 ADD PARTITION (
+PARTITION `p5` VALUES LESS THAN (2010)
+COMMENT 'START \' \\ 
+\' END'
+);
+SELECT * FROM t1 LIMIT 1;
+d
+DROP TABLE t1;
 create table t1 (a int)
 partition by key(a)
 partitions 0.2+e1;
diff -Nrup a/mysql-test/t/partition.test b/mysql-test/t/partition.test
--- a/mysql-test/t/partition.test	2007-07-02 20:11:52 +02:00
+++ b/mysql-test/t/partition.test	2007-10-10 09:01:55 +02:00
@@ -10,6 +10,30 @@ drop table if exists t1;
 --enable_warnings
 
 #
+# Bug #30695: An apostrophe ' in the comment of the ADD PARTITION causes the Server to
crash.
+#
+
+CREATE TABLE t1 (
+    d DATE NOT NULL
+)
+PARTITION BY RANGE( YEAR(d) ) (
+    PARTITION p0 VALUES LESS THAN (1960),
+    PARTITION p1 VALUES LESS THAN (1970),
+    PARTITION p2 VALUES LESS THAN (1980),
+    PARTITION p3 VALUES LESS THAN (1990)
+);
+
+ALTER TABLE t1 ADD PARTITION (
+PARTITION `p5` VALUES LESS THAN (2010)
+COMMENT 'START \' \\ 
+ \' END'
+);
+
+SELECT * FROM t1 LIMIT 1;
+
+DROP TABLE t1;
+
+#
 # Bug 15890: Strange number of partitions accepted
 #
 -- error 1064
diff -Nrup a/sql/sql_partition.cc b/sql/sql_partition.cc
--- a/sql/sql_partition.cc	2007-09-14 12:17:40 +02:00
+++ b/sql/sql_partition.cc	2007-10-10 09:01:55 +02:00
@@ -1849,6 +1849,20 @@ static int add_uint(File fptr, ulonglong
   return add_string(fptr, buff);
 }
 
+/*
+   Must escape strings in partitioned tables frm-files,
+   parsing it later with mysql_unpack_partition will fail otherwise.
+*/
+static int add_quoted_string(File fptr, const char *quotestr)
+{
+  String orgstr(quotestr, system_charset_info);
+  String escapedstr;
+  int err= add_string(fptr, "'");
+  err+= append_escaped(&escapedstr, &orgstr);
+  err+= add_string(fptr, escapedstr.c_ptr());
+  return err + add_string(fptr, "'");
+}
+
 static int add_keyword_string(File fptr, const char *keyword,
                               bool should_use_quotes, 
                               const char *keystr)
@@ -1859,10 +1873,9 @@ static int add_keyword_string(File fptr,
   err+= add_equal(fptr);
   err+= add_space(fptr);
   if (should_use_quotes)
-    err+= add_string(fptr, "'");
-  err+= add_string(fptr, keystr);
-  if (should_use_quotes)
-    err+= add_string(fptr, "'");
+    err+= add_quoted_string(fptr, keystr);
+  else
+    err+= add_string(fptr, keystr);
   return err + add_space(fptr);
 }