The testcase. In this case strings get truncated.
ODBC_TEST(same_len_ptr_binding)
{
SQLLEN lenPtr;
SQLWCHAR a[10], b[10], c[10];
SQLWCHAR a_ref[]=

, c_ref[]=

;

a[0]= b[0]= c[0]= 0;

OK_SIMPLE_STMT(Stmt, "DROP table IF EXISTS t_odbc19");

OK_SIMPLE_STMT(Stmt, "CREATE table t_odbc19(a varchar(10), b varchar(10), c varchar(10))");

OK_SIMPLE_STMT(Stmt, "insert into t_odbc19(a, c) values( 'MariaDB', 'Sky')");

OK_SIMPLE_STMTW(Stmt, L"select a, b, c from t_odbc19");

CHECK_STMT_RC(Stmt, SQLBindCol(Stmt, 1, SQL_C_WCHAR, a, sizeof(a), &lenPtr));
CHECK_STMT_RC(Stmt, SQLBindCol(Stmt, 2, SQL_C_WCHAR, b, sizeof(b), &lenPtr));
CHECK_STMT_RC(Stmt, SQLBindCol(Stmt, 3, SQL_C_WCHAR, c, sizeof(c), &lenPtr));

CHECK_STMT_RC(Stmt, SQLFetch(Stmt));

IS_WSTR(a, a_ref, sizeof(a_ref)/sizeof(SQLWCHAR));
IS_WSTR(c, c_ref, sizeof(a_ref)/sizeof(SQLWCHAR));

CHECK_STMT_RC(Stmt, SQLFreeStmt(Stmt, SQL_CLOSE));

OK_SIMPLE_STMT(Stmt, "DROP table t_odbc19");

return OK;
}