Simple example to show how to read and dump the data of a table using kernel's cffi, and arrow-glib.
This example is built with cmake. Instructions below assume you start in the directory containing this README.
Note that prior to building these examples you must build delta_kernel_ffi (see [the FFI readme] for details). TLDR:
# from repo root
$ cargo build -p delta_kernel_ffi [--release] [--features default-engine, tracing]
# from ffi/ dir
$ cargo build [--release] [--features default-engine, tracing]There are two configurations that can currently be configured in cmake:
# turn on VERBOSE mode (default is off) - print more diagnostics
$ cmake -DVERBOSE=yes ..
# turn off PRINT_DATA (default is on) - see below
$ cmake -DPRINT_DATA=no ..Most likely something like this should work:
$ mkdir build
$ cd build
$ cmake ..
$ make
$ ./read_table [path/to/table]
For windows, assuming you already have a working cmake + c toolchain:
PS mkdir build
PS cd build
PS cmake -G "Visual Studio 17 2022" ..
PS cmake --build .
PS .\Debug\read_table.exe [path\to\table]
If running on windows you should also run chcp.exe 65001 to set the codepage to utf-8, or things
won't print out correctly.
This example uses the arrow-glib (c) component from arrow to print out data. This requires
installing that component which can be non-trivial. Please see
here to find installation instructions for your system.
For macOS and homebrew this should be as easy as:
brew install apache-arrow-glib
If you don't want to have to install this, you can run ccmake .. (cmake-gui.exe .. on windows)
from the build directory, and turn OFF/uncheckmark PRINT_DATA. Then "configure" and
"generate" and follow the above instructions again.