93cf5c8bfa616cbbbb69087c18c6717d207b7944
Foundation for the upcoming PostgreSQL-wire server. The SQL engine
previously held transaction state and the plan cache in module-level
STATICs:
TSqlTxn.prg:16-18
STATIC s_aTxnLog := {}
STATIC s_lInTxn := .F.
STATIC s_hSavepoints := NIL
TFiveSQL.prg:37
STATIC s_hPlanCache := { => }
gengo emits PRG STATIC as Go *package* variables, so two clients
sharing one process serialised through a single transaction log:
client A's `BEGIN; INSERT;` followed by client B's `ROLLBACK`
would silently undo A's insert. Acceptable for embedded single-
caller use; show-stopper for a multi-connection daemon.
Moved each of those into instance fields on a new TSqlSession class.
Every executor instance now carries an oSession pointer that's
inherited by nested subquery executors. A process-default session
is lazy-initialised by SqlDefaultSession() so embedded
`five_SQL(cSQL)` callers (today's only consumer) keep working
unchanged.
Changes
-------
* `_FiveSql2/src/TSqlSession.prg` (new) — class holding the four
ex-STATICs plus seats for auth/ACL state and a list of workareas
the session opened (used later for disconnect cleanup). Module-
level `SqlDefaultSession()` lazily creates one process-wide
default for embedded callers.
* `_FiveSql2/src/TSqlTxn.prg` — added `oSession` DATA; New() takes
an optional oSession and falls back to the default. All STATIC
reads/writes rewritten as `::oSession:aTxnLog`,
`::oSession:lInTxn`, etc.
* `_FiveSql2/src/TFiveSQL.prg` — added `oSession` DATA; New() takes
an optional second arg. Plan-cache reads/writes route through
`::oSession:hPlanCache`. SQL_PLAN_CACHE_MAX now caps each session
independently (a chatty client only flushes its own cache, not
the shared one).
* `_FiveSql2/src/TSqlExecutor.prg` — added `oSession` DATA; New()
takes an optional third arg; `::oTxn := TSqlTxn():New(::oSession)`
propagates the binding. Every in-class `TSqlExecutor():New(...)`
call site for subqueries / UNION / IN-list materialisation /
EXISTS / lifted subqueries now passes `::oSession` through, so a
child executor inherits the parent's session. Standalone helper
functions (SqlEvalExprNode / SqlFetchRowArr / SqlJoinRecurse /
SqlMaterializeSubquery) intentionally fall back to the default
session — they don't BEGIN/COMMIT and the plan cache is keyed by
schema-version anyway.
* `_FiveSql2/src/FiveSqlCls.prg` — `five_SQL()` gains an optional
fourth arg `oSession`. Existing 1-/2-/3-arg callers keep working;
pgserver will create one TSqlSession per connection and pass it.
Verification
------------
Per-session isolation pinned by a fresh PRG-level regression
(reproducer not committed yet — will land with pgserver test
suite). The scenario:
oSessA := TSqlSession():New()
oSessB := TSqlSession():New()
oSqlA := TFiveSQL():New(NIL, oSessA)
oSqlB := TFiveSQL():New(NIL, oSessB)
oSqlA:Execute("BEGIN") -- A in txn
oSqlB:Execute("BEGIN") -- B in txn, A unaffected
oSqlB:Execute("INSERT ... VALUES(2,'b-row')")
oSqlB:Execute("COMMIT") -- B committed, A still in txn
oSqlA:Execute("ROLLBACK") -- A's empty rollback, B's row survives
All four assertions pass post-refactor, would fail pre-refactor
because both sessions wrote the same `s_aTxnLog`.
All six release gates green:
go test ./... ✓
FiveSql2 SQL:1999 43/43 ✓
Harbour compat 56/56 ✓
std.ch 17/17 ✓
FRB 7/7 ✓
examples 65/71 ✓ (unchanged baseline)
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Five — Harbour + Go Fusion Language
Harbour PRG 코드를 네이티브 Go 바이너리로 컴파일하는 퓨전 언어.
30년간 축적된 Harbour/xBase 비즈니스 로직을 Go의 성능, 동시성, 크로스 플랫폼 위에서 실행합니다.
employees.prg → five build → employees (단일 실행파일, 18MB)
주요 특징
- Harbour 문법 100% 지원 (CLASS, CODE BLOCK, BEGIN SEQUENCE, ...)
- Go 네이티브 바이너리 출력 (CGo 없음, 순수 Go)
- DBF/NTX/CDX 데이터베이스 엔진 내장
- 479개 RTL 내장 함수
- FiveSql2: DBF 위에서 SQL:1999 쿼리 (43/43 테스트 통과)
- Goroutine/Channel 확장 (
GO BLOCK,CHANNEL) - @byref 참조 전달, mutable closure
- 대화형 디버거 (TUI/CLI)
빌드 방법
1. Go 설치
Five는 Go 1.21 이상이 필요합니다.
Linux/WSL:
# 이미 설치되어 있는지 확인
go version
# 없으면 설치
wget https://go.dev/dl/go1.22.5.linux-amd64.tar.gz
sudo rm -rf /usr/local/go
sudo tar -C /usr/local -xzf go1.22.5.linux-amd64.tar.gz
echo 'export PATH=$PATH:/usr/local/go/bin:$HOME/go/bin' >> ~/.bashrc
source ~/.bashrc
go version
macOS (Apple Silicon — M1/M2/M3/M4):
brew install go
# 또는 직접 다운로드:
wget https://go.dev/dl/go1.22.5.darwin-arm64.tar.gz
sudo tar -C /usr/local -xzf go1.22.5.darwin-arm64.tar.gz
echo 'export PATH=$PATH:/usr/local/go/bin:$HOME/go/bin' >> ~/.zshrc
source ~/.zshrc
macOS (Intel):
brew install go
# 또는 직접 다운로드:
wget https://go.dev/dl/go1.22.5.darwin-amd64.tar.gz
sudo tar -C /usr/local -xzf go1.22.5.darwin-amd64.tar.gz
echo 'export PATH=$PATH:/usr/local/go/bin:$HOME/go/bin' >> ~/.zshrc
source ~/.zshrc
Windows:
https://go.dev/dl/ 에서 .msi 설치
2. Five 컴파일러 빌드
git clone https://gitea.fivego.org/fivedev/five.git
cd five
go build -o five ./cmd/five
빌드 확인:
./five version
3. PRG 프로그램 컴파일 및 실행
단일 파일:
# 컴파일
./five build examples/hello.prg -o hello
# 실행
./hello
다중 파일 (FiveSql2 등):
./five build _FiveSql2/test/test_sql1999.prg _FiveSql2/src/*.prg -o test_sql
./test_sql
4. 테스트 실행
# Go 유닛 테스트
go test ./...
# FiveSql2 SQL 테스트 (43/43)
./five build _FiveSql2/test/test_sql1999.prg _FiveSql2/src/*.prg -o /tmp/test_sql
cd /tmp && ./test_sql
# Harbour 호환 테스트 (51/51)
./five build tests/compat_harbour.prg -o /tmp/test_compat
/tmp/test_compat
Five 명령어
five run <file.prg> 컴파일 후 즉시 실행
five build <file.prg> [-o out] 네이티브 바이너리 생성
five gen <file.prg> 생성된 Go 코드 출력 (디버깅용)
five debug <file.prg> 대화형 디버거 실행
five version 버전 정보
Hello World
// hello.prg
PROCEDURE Main()
? "Hello, Five!"
? "Date:", Date()
? "Time:", Time()
RETURN
./five build hello.prg -o hello && ./hello
SQL 예제
// sql_demo.prg
#include "FiveSqlDef.ch"
PROCEDURE Main()
// 테이블 생성
five_SQL("CREATE TABLE employees (id INTEGER, name CHAR(30), salary NUMERIC(12,2))")
// 데이터 삽입
five_SQL("INSERT INTO employees (id, name, salary) VALUES (1, 'Alice', 8000)")
five_SQL("INSERT INTO employees (id, name, salary) VALUES (2, 'Bob', 7000)")
// SQL 쿼리
LOCAL aR := five_SQL("SELECT name, salary FROM employees WHERE salary > 6000 ORDER BY salary DESC")
? "Results:", Len(aR[2]), "rows"
LOCAL i
FOR i := 1 TO Len(aR[2])
? " ", aR[2][i][1], aR[2][i][2]
NEXT
RETURN
./five build sql_demo.prg _FiveSql2/src/*.prg -o sql_demo && ./sql_demo
프로젝트 구조
five/
├── cmd/five/ Five CLI (main entry point)
├── compiler/ PRG → Go 컴파일러
│ ├── lexer/ 토크나이저
│ ├── parser/ 구문 분석기
│ ├── analyzer/ 의미 분석기
│ ├── gengo/ Go 코드 생성기
│ └── pp/ 전처리기 (#include, #define)
├── hbrt/ 런타임 (VM, Stack, Value, Class)
├── hbrtl/ RTL 표준 라이브러리 (479개 함수)
├── hbrdd/ RDD 데이터베이스 엔진
│ ├── dbf/ DBF 파일 드라이버
│ ├── ntx/ NTX 인덱스 드라이버
│ ├── cdx/ CDX 인덱스 드라이버
│ └── mem/ 메모리 RDD
├── _FiveSql2/ SQL:1999 엔진 (PRG)
│ ├── src/ SQL 엔진 소스 (14 파일, 10,458 LOC)
│ └── test/ SQL 테스트 스위트
├── tests/ 호환성 테스트
├── examples/ 예제 프로그램
└── docs/ 기술 문서
현재 상태
| 항목 | 수치 |
|---|---|
| Go 프로덕션 코드 | ~36,000 LOC |
| RTL 내장 함수 | 479개 |
| RDD 드라이버 | 4종 (DBF, NTX, CDX, Memory) |
| FiveSql2 테스트 | 43/43 (100%) |
| 호환 테스트 | 51/51 (100%) |
| Go 테스트 | ALL PASS |
라이선스
Copyright (c) 2025-2026 Charles KWON OhJun (charleskwonohjun@gmail.com) All rights reserved.
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