% tar xf hisqry-1.20211003.tbz2
% cd hisqry-1.20211003/src/single
% make
c++ -o hisqry.pm -std=c++17 -O3 -I.. -I../type -I../db -I../opr -I../eng -I../psr
-I../sql -I../hisqry -I/usr/local/include single.cpp  -L/usr/local/lib -ledit
-lboost_program_options
% ./hisqry.pm
SELECT (1), (2), (3);

[string:1] [string:2] [string:3]
CREATE TABLE hisqry ( major INT, minor INT );
INSERT INTO hisqry VALUES ( 1, 20211003 );
SELECT * FROM hisqry;
major minor
[integer:1] [integer:20211003]
^D
%

Start with --debug:
  --debug prints parsed values into internal strucutres
% ./hisqry.pm --debug
INSERT INTO table VALUES ( 1, 2, 'three' );
IN: INSERT INTO table VALUES ( 1, 2, 'three' );
INSERT INTO table VALUES ( 1, 2, 'three' );
insert: tablename: [table] columns[ ] values:[[i:1][i:2][i:three]]
ERROR: no such table exists: 'table'
%

Start with a database SQL file:
% touch history.sql
% ./hisqry.pm --sql-db-file history.sql
CREATE TABLE integers ( value INTEGER );
INSERT INTO integers VALUES ( 0 ), ( 1 ), ( 2 ), ( 3 ), ( 5 ), ( 8 ), ( 13 );

Start as a server and accept connection on port 11235
% ./hisqry.pm --port 11235
Connect to port 11235 using "telnet" and send SQL statements
% telnet localhost 11235
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
CREATE TABLE integers ( value INTEGER );
INSERT INTO integers VALUES ( 0 ), ( 1 ), ( 2 ), ( 3 ), ( 5 ), ( 8 ), ( 13 );
^]
telnet> quit
Connection closed.