The following Preprocessor Options can be used to control the build:

USE_INTERNAL_NULL_INDICATOR
USE_LLVM_SELECT
USE_NEW_EXTRACT
LOAD_NULLABLE

Create a build directory and invoke cmake inside that directory:

cmake -DCMAKE_BUILD_TYPE=Release <source path>
make

Remember to put a directory named tables with the database data inside the build directory. Invoke the llvm-prototype executable without any additional arguments.

The default SQL Schema, namely schema.sql, resides inside the 'schemas' directory. This file will be treated like any other source file, therefore a simple rebuild is enough to reflect any change to this file.