[ChatBI] 直接 NL2SQL 不行,怎么才行呢
NL2SQL 对于堆 table schema ,在表结构太复杂的时候无法控制上下文长度,且 schema 太多了,依靠大模型来写 sql ,非常容易答非所问或者错误 sql 。 semantic layer (下称 SL )基本上成为了让大模型写出 sql 准确的唯一实现路径。
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