diff options
Diffstat (limited to 'sql/item.cc')
| -rw-r--r-- | sql/item.cc | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/sql/item.cc b/sql/item.cc index d3888cef9d5..7fbeb6f15db 100644 --- a/sql/item.cc +++ b/sql/item.cc @@ -635,6 +635,33 @@ Item *Item_string::safe_charset_converter(CHARSET_INFO *tocs) } +Item *Item_static_string_func::safe_charset_converter(CHARSET_INFO *tocs) +{ + Item_string *conv; + uint conv_errors; + String tmp, cstr, *ostr= val_str(&tmp); + cstr.copy(ostr->ptr(), ostr->length(), ostr->charset(), tocs, &conv_errors); + if (conv_errors || + !(conv= new Item_static_string_func(func_name, + cstr.ptr(), cstr.length(), + cstr.charset(), + collation.derivation))) + { + /* + Safe conversion is not possible (or EOM). + We could not convert a string into the requested character set + without data loss. The target charset does not cover all the + characters from the string. Operation cannot be done correctly. + */ + return NULL; + } + conv->str_value.copy(); + /* Ensure that no one is going to change the result string */ + conv->str_value.mark_as_const(); + return conv; +} + + bool Item_string::eq(const Item *item, bool binary_cmp) const { if (type() == item->type() && item->basic_const_item()) |