Changelog

Source: NEWS.md

mdbr 0.3.3

• Fixed compilation failure on Linux with clang-22 / clang-ASAN (CRAN’s clang-ASAN check platform). vasprintf() requires _GNU_SOURCE to be visible from glibc’s <stdio.h>; added #define _GNU_SOURCE guard at the top of src/mdbtools/src/libmdb/fakeglib.c before system headers are included. Not needed on macOS where vasprintf() is always available.

mdbr 0.3.2

• Fixed heap-use-after-free in mdbr_run_query (detected by AddressSanitizer on CRAN’s M1-SAN and Linux sanitizer checks). When a SQL query failed, the error message was read from a pointer into the MdbSQL struct after the struct had been freed via mdb_sql_exit(). The error string is now copied into a local buffer before cleanup (#15).

mdbr 0.3.1

• Fixed compilation failure on macOS ARM64 (CRAN r-release-macos-arm64 and r-oldrel-macos-arm64). The vendored mdbtools source now correctly includes <xlocale.h> on Apple platforms, where locale_t is not exposed through <locale.h> alone under strict SDK settings (#14).

• Fixed four C compiler warnings in vendored mdbtools source that caused CRAN pre-test rejection (#12):

  • catalog.c: expanded GCC-only ?: to standard ternary
  • file.c, table.c: cast void* to char* before pointer arithmetic
  • index.c: declared idx_to_text as unsigned char[] to hold 0x81

mdbr 0.3.02026-05-23

• The mdbtools C library is now compiled and bundled with the package. No external mdbtools installation is required on any platform (#3).

• A full read-only DBI backend is now available via mdb() (#6):

  con <- DBI::dbConnect(mdb(), dbname = "path/to/file.mdb")
  DBI::dbListTables(con)
  DBI::dbGetQuery(con, "SELECT * FROM [Orders] LIMIT 10;")
  DBI::dbDisconnect(con)

• New helper functions: mdb_sql(), mdb_queries(), mdb_count(), mdb_json(), mdb_export(), mdb_ver(), mdb_array(), mdb_header(), mdb_hexdump(), and mdb_prop().

• mdb_schema() gains a mode argument for DDL output in multiple SQL dialects in addition to the existing readr col-spec mode.

• read_mdb() now reads tables via the bundled C library and returns a tibble. The col_types and ... arguments are deprecated with a lifecycle warning.

• readr is no longer a hard dependency. If you use read_mdb() and rely on readr being available, add it explicitly to your own dependencies.

• Thanks to Bruno Tremblay for contributing the bundled mdbtools source, the DBI backend, and the expanded helper functions (#9).

mdbr 0.2.12024-03-12

• Update maintainer email, website URL, and GitHub URL.

mdbr 0.2.0

• Functions now quote their input files with shQuote(). (#7)
• export_mdb() now mirrors readr::format_csv() with arguments, etc.
• Remove all formatting arguments for read_mdb() (with smart hidden defaults).
• Add more schema types with readr equivalents.
• Write schema to a matrix in-memory rather than a temporary file.
• Always read data from a temporary file instead of stdout option.
• Add better checking if mdbtools is installed.

mdbr 0.1.1

• read_mdb() now has stdout() which can take TRUE or a file path.
• Examples and tests don’t run on CRAN.

mdbr 0.1.0

• Added a NEWS.md file to track changes to the package.
• Cover the most basic functions from mdbtools:
  • List tables in database
  • Export table as delimited file
  • Read delimited file as dataframe
  • Convert simple schema to readr spec