diff options
Diffstat (limited to 'sql/field.cc')
| -rw-r--r-- | sql/field.cc | 24 |
1 files changed, 17 insertions, 7 deletions
diff --git a/sql/field.cc b/sql/field.cc index 2950f349580..99b61ec1ee0 100644 --- a/sql/field.cc +++ b/sql/field.cc @@ -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))) { |