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merge with 3.23.51

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BitKeeper/etc/ignore:
  auto-union
BitKeeper/etc/logging_ok:
  auto-union
BitKeeper/deleted/.del-mysql_fix_extensions.sh:
  Delete: scripts/mysql_fix_extensions.sh
Build-tools/Do-rpm:
  Auto merged
Makefile.am:
  Auto merged
client/mysqldump.c:
  Auto merged
client/mysqltest.c:
  Auto merged
extra/resolve_stack_dump.c:
  Auto merged
include/my_pthread.h:
  Auto merged
include/my_sys.h:
  Auto merged
include/mysqld_error.h:
  Auto merged
innobase/row/row0ins.c:
  Auto merged
innobase/row/row0mysql.c:
  Auto merged
innobase/row/row0sel.c:
  Auto merged
isam/pack_isam.c:
  Auto merged
libmysql/libmysql.c:
  Auto merged
mysql-test/r/func_if.result:
  Auto merged
mysql-test/t/join.test:
  Auto merged
mysys/array.c:
  Auto merged
mysys/charset.c:
  Auto merged
mysys/default.c:
  Auto merged
mysys/hash.c:
  Auto merged
mysys/my_thr_init.c:
  Auto merged
mysys/raid.cc:
  Auto merged
mysql-test/t/type_decimal.test:
  Auto merged
sql/hostname.cc:
  Auto merged
sql/item.h:
  Auto merged
sql/item_cmpfunc.h:
  Auto merged
sql/item_timefunc.h:
  Auto merged
sql/log.cc:
  Auto merged
sql/mini_client.cc:
  Auto merged
sql/sql_parse.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged
strings/Makefile.am:
  Auto merged
This commit is contained in:
unknown
2002-05-16 18:20:49 +03:00
parent 2618c6963c 74d29a0771
commit 4d094257db
769 changed files with 673 additions and 86016 deletions
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42
innobase/row/row0mysql.c
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@ -28,6 +28,9 @@ Created 9/17/2000 Heikki Tuuri
#include "rem0cmp.h"
#include "log0log.h"
/* A dummy variable used to fool the compiler */
ibool row_mysql_identically_false = FALSE;
/* List of tables we should drop in background. ALTER TABLE in MySQL requires
that the table handler can drop the table in background when there are no
queries to it any more. Protected by the kernel mutex. */
@ -63,15 +66,48 @@ row_mysql_store_blob_ref(
byte* dest, /* in: where to store */
ulint col_len, /* in: dest buffer size: determines into
how many bytes the BLOB length is stored,
this may vary from 1 to 4 bytes */
byte* data, /* in: BLOB data */
ulint len) /* in: BLOB length */
the space for the length may vary from 1
to 4 bytes */
byte* data, /* in: BLOB data; if the value to store
is SQL NULL this should be NULL pointer */
ulint len) /* in: BLOB length; if the value to store
is SQL NULL this should be 0; remember
also to set the NULL bit in the MySQL record
header! */
{
ulint sum = 0;
ulint i;
/* MySQL might assume the field is set to zero except the length and
the pointer fields */
memset(dest, '\0', col_len);
/* In dest there are 1 - 4 bytes reserved for the BLOB length,
and after that 8 bytes reserved for the pointer to the data.
In 32-bit architectures we only use the first 4 bytes of the pointer
slot. */
ut_a(col_len - 8 > 1 || len < 256);
ut_a(col_len - 8 > 2 || len < 256 * 256);
ut_a(col_len - 8 > 3 || len < 256 * 256 * 256);
/* We try to track an elusive bug which probably was fixed
May 9, 2002, but better be sure: we probe the data buffer
to make sure it is in valid allocated memory */
for (i = 0; i < len; i++) {
sum += (ulint)(data + i);
}
/* The variable below is identically false, we just fool the
compiler to not optimize away our loop */
if (row_mysql_identically_false) {
printf("Sum %lu\n", sum);
}
mach_write_to_n_little_endian(dest, col_len - 8, len);
ut_memcpy(dest + col_len - 8, (byte*)&data, sizeof(byte*));