MDEV-27195 SIGSEGV in Table_scope_and_contents_source_st::vers_check_system_fieldsbb-10.3-bar-MDEV-27195

The old code erroneously used default_charset_info to compare field names.
default_charset_info can point to any arbitrary collation,
including ucs2*, utf16*, utf32*, including those that do not
support strcasecmp().

my_charset_utf8mb4_unicode_ci, which is used in this scenario:

CREATE TABLE t1 ENGINE=InnoDB WITH SYSTEM VERSIONING AS SELECT 0;

does not support strcasecmp().

Fixing the code to use Lex_ident::streq(), which uses
system_charset_info instead of default_charset_info.

0 files changed, 0 insertions, 0 deletions