StackQL Parser

This is the stackql parser, a forked descendent of vitess; we are deeply grateful to and fully acknowledge this work.

There are elements of the original work that are not required, but may take some time to excise.

Rebuilding parser

make -C go/vt/sqlparser

After changes to the ast:

cicd/build_scripts/01_ast_rebuild.sh

Unless otherwise noted, source files are distributed under the Apache Version 2.0 license found in the LICENSE file.