From 00c4f12d4e2b88e573a8247f26679994cf09f217 Mon Sep 17 00:00:00 2001
From: Christian Ehrlicher <ch.ehrlicher@gmx.de>
Date: Sun, 22 Jan 2023 19:59:16 +0100
Subject: [PATCH] SQL/ODBC: Pass correct length to SQLColAttribute()

This ensures the tst_QSqlQuery::record() test passes when checking the
tablename.

Change-Id: I146f9f627ea366c6813af61ce48b930ca1041b15
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
(cherry picked from commit 9ea00c70fbbe61d4c2da98c3d9390bfbada157bd)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
---
 src/plugins/sqldrivers/odbc/qsql_odbc.cpp | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/plugins/sqldrivers/odbc/qsql_odbc.cpp b/src/plugins/sqldrivers/odbc/qsql_odbc.cpp
index 94c124f039f..a6e14e3dae9 100644
--- a/src/plugins/sqldrivers/odbc/qsql_odbc.cpp
+++ b/src/plugins/sqldrivers/odbc/qsql_odbc.cpp
@@ -712,10 +712,15 @@ static QSqlField qMakeFieldInfo(const SQLHANDLE hStmt, int i, QString *errorMess
     f.setAutoValue(isAutoValue(hStmt, i));
     QVarLengthArray<SQLTCHAR> tableName(TABLENAMESIZE);
     SQLSMALLINT tableNameLen;
-    r = SQLColAttribute(hStmt, i + 1, SQL_DESC_BASE_TABLE_NAME, tableName.data(),
-                        TABLENAMESIZE, &tableNameLen, 0);
+    r = SQLColAttribute(hStmt,
+                        i + 1,
+                        SQL_DESC_BASE_TABLE_NAME,
+                        tableName.data(),
+                        SQLSMALLINT(tableName.size() * sizeof(SQLTCHAR)), // SQLColAttribute needs/returns size in bytes
+                        &tableNameLen,
+                        0);
     if (r == SQL_SUCCESS)
-        f.setTableName(fromSQLTCHAR(tableName, tableNameLen));
+        f.setTableName(fromSQLTCHAR(tableName, tableNameLen / sizeof(SQLTCHAR)));
     return f;
 }