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Follow-up to B-g#15776, test failures on 64-bit linux.

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Make maximum blob size to be 2**32-1, regardless of word size.

Fix failure of timestamp with size of 2**31-1.  The method of
rounding up to the nearest even number would overflow.
This commit is contained in:
cmiller@zippy.cornsilk.net
2008-04-09 12:27:30 -04:00
parent 7a9f12e1c4
commit 3e2457b71a
4 changed files with 26 additions and 10 deletions
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24
sql/field.cc
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@ -6848,6 +6848,7 @@ uint32 Field_blob::get_length(const char *pos)
return (uint32) tmp;
}
}
/* When expanding this, see also MAX_FIELD_BLOBLENGTH. */
return 0; // Impossible
}
@ -8395,11 +8396,11 @@ bool create_field::init(THD *thd, char *fld_name, enum_field_types fld_type,
(fld_type_modifier & NOT_NULL_FLAG) && fld_type != FIELD_TYPE_TIMESTAMP)
flags|= NO_DEFAULT_VALUE_FLAG;
if (fld_length != 0)
if (fld_length != NULL)
{
errno= 0;
length= strtoul(fld_length, NULL, 10);
if (errno != 0)
if ((errno != 0) || (length > MAX_FIELD_BLOBLENGTH))
{
my_error(ER_TOO_BIG_DISPLAYWIDTH, MYF(0), fld_name, MAX_FIELD_BLOBLENGTH);
DBUG_RETURN(TRUE);
@ -8556,7 +8557,7 @@ bool create_field::init(THD *thd, char *fld_name, enum_field_types fld_type,
}
break;
case FIELD_TYPE_TIMESTAMP:
if (!fld_length)
if (fld_length == NULL)
{
/* Compressed date YYYYMMDDHHMMSS */
length= MAX_DATETIME_COMPRESSED_WIDTH;
@ -8565,12 +8566,21 @@ bool create_field::init(THD *thd, char *fld_name, enum_field_types fld_type,
{
/*
We support only even TIMESTAMP lengths less or equal than 14
and 19 as length of 4.1 compatible representation.
and 19 as length of 4.1 compatible representation. Silently
shrink it to MAX_DATETIME_COMPRESSED_WIDTH.
*/
length= ((length+1)/2)*2; /* purecov: inspected */
length= min(length, MAX_DATETIME_COMPRESSED_WIDTH); /* purecov: inspected */
DBUG_ASSERT(MAX_DATETIME_COMPRESSED_WIDTH < UINT_MAX);
if (length != UINT_MAX) /* avoid overflow; is safe because of min() */
length= ((length+1)/2)*2;
length= min(length, MAX_DATETIME_COMPRESSED_WIDTH);
}
flags|= ZEROFILL_FLAG | UNSIGNED_FLAG;
/*
Since we silently rewrite down to MAX_DATETIME_COMPRESSED_WIDTH bytes,
the parser should not raise errors unless bizzarely large.
*/
max_field_charlength= UINT_MAX;
if (fld_default_value)
{
/* Grammar allows only NOW() value for ON UPDATE clause */
@ -8677,7 +8687,7 @@ bool create_field::init(THD *thd, char *fld_name, enum_field_types fld_type,
((length > max_field_charlength && fld_type != FIELD_TYPE_SET &&
fld_type != FIELD_TYPE_ENUM &&
(fld_type != MYSQL_TYPE_VARCHAR || fld_default_value)) ||
(!length &&
((length == 0) &&
fld_type != MYSQL_TYPE_STRING &&
fld_type != MYSQL_TYPE_VARCHAR && fld_type != FIELD_TYPE_GEOMETRY)))
{