Enhance dialog context handling for Text2SQL queries by integrating session history. Introduce new methods for summarizing previous assistant messages and determining if the last interaction was a data query. Update environment configuration for embedding options and improve error handling in SQL generation. Add user-facing delivery messages for successful SQL execution. This update supports more coherent follow-up questions and improves user experience in conversational interactions.

.env

@@ -14,7 +14,8 @@ MAX_TOKENS=4096
 TEXT2SQL_DIALECT=sqlserver
 
 # ========== Embedding 配置 ==========
-# false = 使用兼容 OpenAI 的远程 /v1/embeddings（优先 ModelScope，未配置 MODELSCOPE_* 时用 DashScope）
+# 默认 false：使用远程 /v1/embeddings（须配置下方 OPENAI_* 或 MODELSCOPE_* 等）
+# 仅当 true 时需设置 EMBEDDING_MODEL_PATH 指向本地 HuggingFace 模型目录
 USE_LOCAL_EMBEDDING=false
 # ModelScope 推理 API：https://www.modelscope.cn/docs/inference-api
 # MODELSCOPE_API_KEY=ms-b95f3233-4797-4efd-90e6-b3728743571d
@@ -28,13 +29,17 @@ OPENAI_BASE_URL=http://113.192.49.54:9080/v1
 OPENAI_API_KEY=sk-proj-FEb2ChHZK5Llm0tBkmNIT3BlbkFJbu0b0zQpTW8762yD6HDv
 OPENAI_EMBEDDING_MODEL=text-embedding-ada-002
 
- 
-# ========== Schema 配置 ==========
-SCHEMA_DIR=./data/schemas
-SCHEMA_FILE=${SCHEMA_DIR}/G3SB_MCDataDictionary_table_structure.json
-
-# ========== 向量数据库配置 ==========
+# ========== 数据文件与向量库路径（均相对仓库根目录）==========
+# G3SB 表结构；api_server 用 SCHEMA_PATH / SCHEMA_META_PATH（勿用 SCHEMA_FILE，代码不读）
+SCHEMA_PATH=./data/schemas/G3SB_MCDataDictionary_table_structure.json
+# G3SB 表注释，与 structure 同名配对；粗筛 embedding 文本会含表注释
+SCHEMA_META_PATH=./data/schemas/G3SB_MCDataDictionary_table_meta.json
+# Schema 表级向量持久化目录（Chroma 集合名固定为 schema_tables）；改 structure/meta 后需强制重建索引
 VECTOR_DB_PATH=./data/embeddings/chroma
+# Few-shot 源 JSONL（build_fewshot_chroma_index.py 默认读此变量）
+FEWSHOT_DATA_PATH=./data/experiences/all_samples.jsonl
+# Few-shot 向量持久化目录（Chroma 集合名默认 fewshot_samples；勿与 VECTOR_DB_PATH 混用同一目录）
+FEWSHOT_CHROMA_PATH=./data/embeddings/chroma_fewshot
 
 # ========== 验证配置 ==========
 ENABLE_SQL_VALIDATION=true
@@ -51,11 +56,14 @@ FEWSHOT_ENABLED=true
 FEWSHOT_TOP_K=3
 # 示例最低评分（1-10）
 FEWSHOT_MIN_RATING=7
-# 经验数据集路径
-FEWSHOT_DATA_PATH=./data/experiences/all_samples.jsonl
+# 优先使用 Chroma 向量库（运行时检索不依赖 JSONL；灌库: python scripts/build_fewshot_chroma_index.py --force）
+FEWSHOT_USE_CHROMA=true
+# 留空则用代码默认集合名 fewshot_samples
+FEWSHOT_CHROMA_COLLECTION=
 
 # ========== 日志配置 ==========
 LOG_LEVEL=INFO
 LOG_FILE=./logs/text2sql.log
 
-database_url = mssql+pymssql://sa:123456@192.168.3.201:1433/G3SB_PROD_HW
+# 业务库 SQLAlchemy URL（试执行探针 / dbhub）；也可用 DATABASE_URL
+database_url=mssql+pymssql://sa:123456@192.168.3.201:1433/G3SB_PROD_HW