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Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[Unreleased]

0.30.0 - 2026-03-27

  • [breaking] Add missing vairants to InfoType. Thanks to @lfrancke.

0.29.0 - 2026-03-02

Added

  • Add SQLPrimaryKey and SQLPrimaryKeyW

Removed

  • USmallInt type alias has been removed. Use u16 instead.
  • SmallInt type alias has been removed. Use i16 instead.
  • UInteger type alias has been removed. Use u32 instead.
  • Integer type alias has been removed. Use i32 instead.

0.28.0 - 2025-11-30

Added

  • ConnectionAttribute is now a strict alias of i32. This has been done to support driver specific Connection Attributes. E.g. SQL_COPT_SS_ACCESS_TOKEN for Microsoft SQL Server. If you are migrating from the previous version of odbc-sys you will find that each variant of the former ConnectionAttribute enumeration has an equivalent constant. E.g. ConnectionAttribute::PacketSize is now ConnectionAttribute::PACKET_SIZE.
  • unixODBC build script early exits on windows. This makes it easier to use the vendored unix-odbc feature, because we won't need a separate configuration for windows systems anymore. As on windows like platforms unixODBC will be an empty crate instead of one which does not build. On top of that it makes the Rust Analyzer work again for contributers to odbc-sys on windows platforms.

Other

  • Improve doc comment for Numeric

0.27.4 - 2025-10-25

Other

  • updated the following local packages: unix-odbc

0.27.3 - 2025-10-12

Added

  • unix-odbc crate, just does nothing than used with windows
  • introduce compile time feature static_ltdl to allow for explicit

Fixed

  • [breaking] using the static feature flag no longer implies libltdl is

Other

  • Prevent recreating configure script for unixODBC during build
  • formattig
  • Remove superfluous unixODBC tar.gz
  • build from unixODBC source included verbatum
  • Vendor source for unixODBC verbatum
  • update vendor script to include source verbatum
  • remove the need for cargo:rerun-if-env-changed
  • Re-fix #64
  • formattig
  • auto format on ci
  • install unixodbc on empty features in macos and linux
  • no unixodbc feature
  • make the ci script both simpler and more exhaustive
  • Fix issue with vendored unixODBC build not linking dynamically
  • build vendored-unix-odbc on mac os

0.27.2 - 2025-10-09

Fixed

  • An issue has been fixed which prevent the vendored-unix-odbc feature to build on Mac-OS

0.27.1 - 2025-10-08

Added

  • Introduce vendored-unix-odbc flag. This enables building and linking against unixODBC as part of cargo build

0.27.0 - 2025-09-08

Fixed

  • Remove Send from HStmt

0.26.3 - 2025-09-05

Added

  • adds HDesc::as_handle

0.26.2 - 2025-09-05

Added

  • adds HDesc::null()

0.26.1 - 2025-09-05

Added

  • HEnv, HDbc and HStmt now have an as_handle method

0.26.0 - 2025-09-05

Added

  • [breaking] Opaque types referenced by handles are no longer represented by empty enums. Instead handles are strict aliases of c_void.
  • HEnv, HDbc and HStmt now implement Send.

0.25.1 - 2025-08-16

Other

  • Install UnixODBC in test workflow
  • Explain enum {} trick in handles
  • extract handles into own module

0.25.0

Added

  • Automatically detect homebrew library path on Mac-OS

Breaking

  • Fix Typo CDataType::TypeTimestampWithTimzone is now CDataType::TypeTimestampWithTimezone

0.24.0

  • New handle type DBC_INFO_TOKEN.

0.23.1

  • Add SQLSetPos

0.23.0

  • Add InfoType::ActiveEnvironments
  • Fix Typo InfoType::MaxDiverConnections is now InfoType::MaxDriverConnections

Thanks to @lfrancke

0.22.0

  • Extend InfoType to determine cursor capabilities. E.g. InfoType::ScrollOptions

0.21.4

  • Add narrow SQLForeignKeys

0.21.3

  • Add SQLNumParams

0.21.2

  • Add SQLColumns. Previously only SQLColumnsW had been declared.

0.21.1

  • Add SQLColAttribute. Previously only SQLColAttributeW had been declared.

0.21.0

  • Add SQLGetConnectAttr. Previously only wide version had been declared.
  • Removed enum SqlAttributeStringLength in favour of constants.
  • Update edition to 2012

0.2## 0.0

  • Add StatementAttribute::MetadataId

0.19.0

  • Update to Rust edition 2018

0.18.4

  • Check for overflow in len_data_at_exec.

0.18.3

  • Improved documentation connection pooling.

0.18.2

  • Add SQLParamData

0.18.1

  • Add DATA_AT_EXEC
  • Add fn len_data_at_exec

0.18.0

  • Type of NTS and NTSL is now isize.

0.17.2

  • Introduce iodbc feature for linking against iodbc on OS-X.

0.17.1

  • Fix: SqlReturn::INVALID_HANDLE is now correctly set to -2.

0.17.0

  • Remove constants and types specific to Microsoft SQL Server.

    • SS_LENGTH_UNLIMITED
    • SsTime2
    • SsTimestampOffset
    • SS_VARIANT
    • SS_UDT
    • SS_XML
    • SS_TABLE
    • SS_TIME_2
    • SS_TIMESTAMP_OFFSET

  • Renames CDataType::UTinyInty into CDataType::UTinyInt.

  • Renames Nullable into Nullability.

0.16.0

  • ULen is now a type alias for usize.
  • Len is now a type alias for isize.

Both changes do not change binary size of these on any platform, but are more likely to result in portable downstream code.

0.15.0

  • SQLDescribeParam signature changed. The type of the last parameter has been changed to *mut Nullable.
  • CDataType has new Variants Ard and Apd.

0.14.0

  • field_identifier parameter type in SQLSetDescField and SQLSetDescFieldW changed to Desc.

0.13.1

  • Adds function SQLSetDescFieldW.

0.13.0

  • Rewrites enumeration StatementAttribute.
  • Adds function SQLGetStmtAttr.
  • Adds function SQLSetDescField.

0.12.5

  • Numeric members now all public.

0.12.4

  • Derive Default for Numeric.

0.12.3

  • Derive Debug, PartialEq, Eq, Clone and Copy for Numeric.

0.12.2

  • Adds SQLPutData.
  • Adds Numeric.

0.12.1

  • A type alias for SChar.

0.12.0

  • Breaking Change: SqlDataType has been converted from an enumeration into a newtype integer.

0.11.0

Breaking Changes:

  • SQLColAttributeW: field_identifier parameter type has been changed to the new Desc enumeration.
  • Desc has been renamed to Description.

0.1## 0.0

Breaking Changes:

  • Enum variant names have been shortend and use now idiomatic CamelCasing.
  • Type Names now also use idiomatic CamelCasing.
  • The SQL prefix has been dropped from most type names.
  • InputOutput has been renamed to ParamType. As the names of the enumeration should be derived of the Prefix of the associated constants in the C Headers.
  • Enumerations which have been casted from integers are now newtypes in order to prevent undefined behaviour in case the enum is not complete or the driver/driver manager is not ODBC conform.
    • SqlReturn is now a newtype i16 with predifined constants and is now named Return.
    • Nullable is now a newtype i16 with predefined constants.
    • interval_type in IntervalStruct has been changed from Interval to c_int.

0.9.0

  • Adds attributes::SQL_ATTR_CONNECTION_POOLING and attributes::SQL_ATTR_CP_MATCH enums

  • Implements Default trait for attribute values

  • Breaking Change: SQL_ATTR_APPLICATION_KEY constant removed because it is not part of the ODBC standard. If there is any software that depends on this constant defined, users are encouraged to open an issue report

  • Breaking Change: SQL_OV_ODBC_2 constant removed because odbc-sys does not support OBDC versions < 3.## 0.

  • Breaking Change: Enum OdbcVersion renamed to SQL_ATTR_ODBC_VERSION to better reflect it's intended use as a value for environment attribute to be used with SQLSetEnvAttr and SQLGetEnvAttr functions

0.8.2

  • Adds support for static linking

0.8.1

  • Fix: Move SQL_ATTR_ASYNC_STMT_EVENT is now part of the SqlStatementAttribute enumeration.

0.8.0

  • Adds InfoType::SQL_ASYNC_MODE
  • Adds InfoType::SQL_MAX_ASYNC_CONCURRENT_STATEMENTS
  • Adds InfoType::SQL_ASYNC_DBC_FUNCTIONS,
  • Adds InfoType::SQL_DRIVER_AWARE_POOLING_SUPPORTED,
  • Adds InfoType::SQL_ASYNC_NOTIFICATION
  • Adds SqlConnectionAttribute::SQL_ATTR_ASYNC_STMT_EVENT
  • Adds SqlConnectionAttribute::SQL_ATTR_ASYNC_DBC_EVENT

0.7.0

  • Adds SqlDataType::SQL_EXT_TIME_OR_TIME_INTERVAL
  • Adds SqlDataType::SQL_EXT_TIMESTAMP
  • Adds SqlAttributesStringLength
  • Adds SqlConnectionAttribute::SQL_ATTR_ASYNC_ENABLE
  • Adds SqlGetTypeInfo

0.6.3

  • Fix missing SQLConnect

0.6.2

  • yanked due to missing SQLConnect
  • add SqlRowCount

0.6.1

  • Fix: InputOutput is now representend as i16 instead of u16 in C code.