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陈辅元
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#!/usr/bin/env python3
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"""
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自动集成few-shot功能到 Text2SQL 系统
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用法：
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python scripts/patch_fewshot.py --enable --top-k 3 --min-rating 7
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"""
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import argparse
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import re
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from pathlib import Path
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def patch_orchestrator(
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enable: bool = True,
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top_k: int = 3,
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min_rating: int = 7,
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data_path: str = "data/experiences/all_samples.jsonl"
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):
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"""
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修改 agents/orchestrator.py 添加few-shot支持
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"""
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orch_path = Path(__file__).parent.parent / "agents" / "orchestrator.py"
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if not orch_path.exists():
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print(f"❌ 文件不存在: {orch_path}")
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return False
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content = orch_path.read_text(encoding='utf-8')
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# 1. 在文件头部添加import
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import_line = "from utils.fewshot_selector import FewShotSelector"
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if import_line not in content:
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# 找到合适的插入点（在其他import之后）
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last_import = content.rfind("import ")
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if last_import != -1:
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insert_pos = content.find("\n", last_import) + 1
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content = content[:insert_pos] + import_line + "\n" + content[insert_pos:]
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print("✅ 添加 import: from utils.fewshot_selector import FewShotSelector")
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# 2. 修改 __init__ 方法
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init_pattern = r'def __init__\([\s\S]*?\):'
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init_match = re.search(init_pattern, content)
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if init_match:
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init_text = content[init_match.start():init_match.end()]
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# 检查是否已添加few-shot参数
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if "fewshot_enabled" not in init_text:
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# 在参数列表末尾添加（在max_retry之后）
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new_params = """,
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# Few-shot 配置
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fewshot_enabled: bool = True,
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fewshot_samples_path: Optional[str] = None,
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fewshot_top_k: int = 3,
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fewshot_min_rating: int = 7,"""
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# 找到max_retry参数后插入
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max_retry_pos = init_text.find("max_retry:")
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if max_retry_pos != -1:
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comma_pos = init_text.find(",", max_retry_pos) + 1
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new_init = (
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init_text[:comma_pos] +
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new_params +
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init_text[comma_pos:]
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)
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content = content[:init_match.start()] + new_init + content[init_match.end():]
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print("✅ 修改 __init__: 添加few-shot参数")
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# 在__init__方法体内添加few-shot初始化代码
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# 找到"self.max_retry = max_retry"这一行
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max_retry_assign = "self.max_retry = max_retry"
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if max_retry_assign in content[init_match.start():init_match.end()]:
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init_body_start = init_match.end()
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init_body = content[init_body_start:init_body_start + 2000] # 读取前2000字符
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if "self.fewshot_selector" not in init_body:
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fewshot_init = '''
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# Few-shot 初始化
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self.fewshot_enabled = fewshot_enabled
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self.fewshot_top_k = fewshot_top_k
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self.fewshot_min_rating = fewshot_min_rating
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self.fewshot_selector = None
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if self.fewshot_enabled:
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try:
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from utils.fewshot_selector import FewShotSelector
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path = fewshot_samples_path or os.getenv(
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"FEWSHOT_DATA_PATH",
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"./data/experiences/all_samples.jsonl"
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)
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self.fewshot_selector = FewShotSelector(path)
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logger.info(
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f"Few-shot已启用: top_k={fewshot_top_k}, "
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f"min_rating={fewshot_min_rating}"
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)
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except Exception as e:
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logger.warning(f"Few-shot加载失败: {e}，将使用标准生成")
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self.fewshot_enabled = False
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'''
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# 插入到self.max_retry赋值之后
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insert_pos = content[init_match.start():].find(max_retry_assign)
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if insert_pos != -1:
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absolute_pos = init_match.start() + insert_pos + len(max_retry_assign) + 1
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content = content[:absolute_pos] + fewshot_init + content[absolute_pos:]
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print("✅ 修改 __init__: 添加few-shot初始化")
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# 3. 修改 _generate_sql 方法
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generate_pattern = r'def _generate_sql\([\s\S]*?\) -> str:'
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generate_match = re.search(generate_pattern, content)
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if generate_match:
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generate_text = content[generate_match.start():generate_match.end()]
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if "if self.fewshot_enabled" not in generate_text:
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# 在方法开头注入few-shot逻辑
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fewshot_logic = ''' # Few-shot 增强
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if self.fewshot_enabled and self.fewshot_selector:
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try:
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examples = self.fewshot_selector.select(
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question=question,
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top_k=self.fewshot_top_k,
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min_rating=self.fewshot_min_rating
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)
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if examples:
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examples_prompt = "\\n".join([
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f"示例 {i+1}：\\n问题：{ex.question_zh}\\nSQL：\\n{ex.sql}"
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for i, ex in enumerate(examples)
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])
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examples_prompt = (
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f"参考以下相似问题的SQL示例：\\n\\n{examples_prompt}\\n\\n"
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f"请学习上述示例的SQL编写风格和模式，为当前问题生成SQL。"
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)
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# 注入到schema_str前或user_content中
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# 这里选择在schema_str前添加
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schema_str = f"{examples_prompt}Schema信息：\\n{schema_str}"
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logger.debug(f"已注入 {len(examples)} 个few-shot示例")
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except Exception as e:
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logger.warning(f"Few-shot检索失败: {e}")
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'''
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# 插入到方法开头（"dialect_label = dialect" 之前）
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dialect_pos = content[generate_match.start():].find("dialect_label = dialect")
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if dialect_pos != -1:
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absolute_pos = generate_match.start() + dialect_pos
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content = content[:absolute_pos] + fewshot_logic + content[absolute_pos:]
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print("✅ 修改 _generate_sql: 注入few-shot逻辑")
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# 保存修改
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backup_path = orch_path.with_suffix('.py.bak')
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orch_path.write_text(content, encoding='utf-8')
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print(f"✅ 已修改 {orch_path}")
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print(f" 备份文件: {backup_path}")
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return True
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def create_env_config(top_k: int, min_rating: int):
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"""更新.env文件添加few-shot配置"""
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env_path = Path(__file__).parent.parent / ".env"
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if not env_path.exists():
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print(f"⚠️ .env文件不存在: {env_path}")
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return
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content = env_path.read_text(encoding='utf-8')
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additions = f"""
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# Few-shot 配置
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FEWSHOT_ENABLED=true
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FEWSHOT_TOP_K={top_k}
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FEWSHOT_MIN_RATING={min_rating}
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FEWSHOT_DATA_PATH=./data/experiences/all_samples.jsonl
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"""
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# 检查是否已存在
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if "FEWSHOT_ENABLED" not in content:
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with env_path.open('a', encoding='utf-8') as f:
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f.write(additions)
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print(f"✅ 已添加Few-shot配置到 .env")
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else:
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print(f"ℹ️ .env 中已存在FEWSHOT配置，跳过")
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def main():
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parser = argparse.ArgumentParser(description="集成Few-shot功能到Text2SQL系统")
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parser.add_argument("--enable", action="store_true", help="启用few-shot")
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parser.add_argument("--top-k", type=int, default=3, help="每次使用的示例数量")
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parser.add_argument("--min-rating", type=int, default=7, help="示例最低评分")
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parser.add_argument("--env-only", action="store_true", help="仅修改.env")
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args = parser.parse_args()
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if not args.enable and not args.env_only:
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print("请使用 --enable 启用few-shot，或 --env-only 仅修改环境变量")
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return
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print("=" * 60)
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print("Text2SQL Few-shot 集成工具")
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print("=" * 60)
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if args.env_only:
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create_env_config(args.top_k, args.min_rating)
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return
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if args.enable:
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print(f"\n配置: top_k={args.top_k}, min_rating={args.min_rating}")
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# 1. 修改orchestrator.py
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success = patch_orchestrator(
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enable=True,
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top_k=args.top_k,
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min_rating=args.min_rating
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)
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if success:
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# 2. 更新.env
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create_env_config(args.top_k, args.min_rating)
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print("\n" + "=" * 60)
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print("✅ Few-shot集成完成！")
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print("=" * 60)
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print(f"\n下一步:")
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print(f"1. 确保经验数据集已生成:")
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print(f" python scripts/parse_examples.py")
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print(f"\n2. 测试系统:")
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print(f" python main.py \"查询2024年1月的销售额\" --verbose")
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print(f"\n3. 查看日志中的few-shot选择:")
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print(f" Few-shot已选择: Q31, Q6, Q44")
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print(f"\n4. 调整参数:")
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print(f" 编辑 .env 修改 FEWSHOT_TOP_K 和 FEWSHOT_MIN_RATING")
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else:
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print("❌ 集成失败")
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if __name__ == "__main__":
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main()
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