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| author | Marc Mutz <marc.mutz@qt.io> | 2023-03-20 12:33:02 +0100 |
|---|---|---|
| committer | Marc Mutz <marc.mutz@qt.io> | 2023-03-21 22:25:58 +0000 |
| commit | caf0a9c0bd3620979a34b454a4ccffa9d60db886 (patch) | |
| tree | 2a04750aeebed28d7682508e6d745d0e3cd6b4c6 | |
| parent | 44a471d346b76a9823f503e17f7d9bf39dfcf8e1 (diff) | |
QSQL/ODBC: fix regression (trailing NUL)
When we fixed the callers of toSQLTCHAR() to use the result's size()
instead of the input's (which differ, if sizeof(SQLTCHAR) != 2), we
exposed callers to the append(0), which changes the size() of the
result QVLA. Callers that don't rely on NUL-termination (all?) now saw
an additional training NUL.
Fix by not NUL-terminating, and changing the only user of SQL_NTS to
use an explicit length.
Amends 4c445ef0bae8b36ec4a742552f0ebd81a1a90723 and
46af1fe49f7f419dc1b3231de9860e2da0ea48f8.
Done-with: Christian Ehrlicher <ch.ehrlicher@gmx.de>
Change-Id: I6210b77e9417f46294df94cb32ab4134af8dc4c2
Reviewed-by: Andy Shaw <andy.shaw@qt.io>
(cherry picked from commit 9020034b3b6a3a8118e5959beed699bb8aaa3f95)
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
| -rw-r--r-- | src/plugins/sqldrivers/odbc/qsql_odbc.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/plugins/sqldrivers/odbc/qsql_odbc.cpp b/src/plugins/sqldrivers/odbc/qsql_odbc.cpp index 74f8c70be3..f789a63c9b 100644 --- a/src/plugins/sqldrivers/odbc/qsql_odbc.cpp +++ b/src/plugins/sqldrivers/odbc/qsql_odbc.cpp @@ -125,7 +125,6 @@ inline static QVarLengthArray<SQLTCHAR> toSQLTCHAR(const QString &input) { QVarLengthArray<SQLTCHAR> result; toSQLTCHARImpl(result, input); - result.append(0); // make sure it's null terminated, doesn't matter if it already is, it does if it isn't. return result; } @@ -2157,7 +2156,10 @@ void QODBCDriverPrivate::checkUnicode() hDbc, &hStmt); - r = SQLExecDirect(hStmt, toSQLTCHAR(QLatin1String("select 'test'")).data(), SQL_NTS); + { + auto encoded = toSQLTCHAR(QLatin1String("select 'test'")); + r = SQLExecDirect(hStmt, encoded.data(), SQLINTEGER(encoded.size())); + } if (r == SQL_SUCCESS) { r = SQLFetch(hStmt); if (r == SQL_SUCCESS) { |