![]() UNICODE Using encoding ASCII 'UTF8' and UNICODE 'UTF16LE' Otherwise, the log output should be similar to: If you get another connection failure and don't see a log file, there (possibly) are two copies of the driver manager on your computer. TraceFile = (path to log file, or /dev/stdout to output directly to the terminal) Your application might use the wrong version.Įnable the connection log by editing your /etc/odbcinst.ini file to contain the following section with these items: If you see more than one version of the file, you (possibly) have more than one driver manager installed. The most common connection problem is to have two copies of the UnixODBC driver manager installed. If you're unable to make a connection to SQL Server using the ODBC driver, use the following information to identify the problem. Note that ColumnSize can't be greater than 8000 for the varchar(n) type. To avoid this error, ensure that the length of the data after conversion fits into the specified buffer or column. Because a ColumnSize of 1 is less than a BufferLength of (for example) 3, the driver generates an error. In the other direction, it compares ColumnSize with the BufferLength in SQLBindParameter before doing the conversion between the different code pages on the client and server. For example, a right apostrophe character (U+2019) is encoded in CP-1252 as the single-byte 0x92, but in UTF-8 as the 3-byte sequence 0xe2 0x80 0x99.įor example, if your encoding is UTF-8 and you specify 1 for both BufferLength and ColumnSize in SQLBindParameter for an out-parameter, and then attempt to retrieve the preceding character stored in a char(1) column on the server (using CP-1252), the driver attempts to convert it to the 3-byte UTF-8 encoding, but can't fit the result into a 1-byte buffer. This error occurs since conversions between character encodings may change the length of the data. However, if the SQL data type is varchar(n) or char(n), the application binds the parameter as SQL_C_CHAR for the C type, and SQL_CHAR or SQL_VARCHAR for the SQL type, and the character encoding of the client is UTF-8, you may get a "String data, right truncation" error from the driver even if the value of ColumnSize is aligned with the size of the data type on the server. The ColumnSize parameter of SQLBindParameter refers to the number of characters in the SQL type, while BufferLength is the number of bytes in the application's buffer. The driver manager won't attempt this conversion when calling the SQLWCHAR versions of the ODBC API (for example, SQLDriverConnectW). The driver manager attempts this conversion when calling the SQLCHAR versions of the ODBC API (for example, SQLDriverConnectA). Currently, data corruption occurs when one or more characters in the string aren't valid UTF-8 characters. If the client encoding is UTF-8, the driver manager doesn't always correctly convert from UTF-8 to UTF-16. For more information, see End-User-Defined and Private Use Area Characters. Each library may produce different results when performing these conversions. Conversions in the driver use the Windows, Linux, or macOS conversion libraries. Conversions performed on the server within Transact-SQL use the Windows conversion library. Windows, Linux, and macOS convert characters from the Private Use Area (PUA) or End User-Defined Characters (EUDC) differently. For more information, see musl libc - functional differences from glibc. For example, en_US.UTF-8 isn't available. Known issuesĪdditional issues will be posted on the SQL Server Drivers blog.ĭue to system library limitations, Alpine Linux supports fewer character encodings and locales. ![]() It also contains steps for troubleshooting connectivity issues. This article contains a list of known issues with the Microsoft ODBC Driver 13, 13.1, 17, and 18 for SQL Server on Linux and macOS.
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