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Fixed query checker for SQLDatabaseChain (#4780)

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# Fixed query checker for SQLDatabaseChain

When `SQLDatabaseChain`'s llm attribute was deprecated, the query
checker stopped working if `SQLDatabaseChain` is initialised via
`from_llm` method. With this fix, `SQLDatabaseChain`'s query checker
would use the same `llm` as used in the `llm_chain`


## Who can review?
@hwchase17 - project lead

Co-authored-by: imeckr <chandanroutray2012@gmail.com>
This commit is contained in:
Chandan Routray 2023-05-17 04:28:58 +05:30 committed by GitHub
parent 08876ad066
commit 11341fcecb
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langchain/chains/sql_database/base.py
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@ -130,7 +130,7 @@ class SQLDatabaseChain(Chain):
template=QUERY_CHECKER, input_variables=["query", "dialect"]
)
query_checker_chain = LLMChain(
llm=self.llm, prompt=query_checker_prompt
llm=self.llm_chain.llm, prompt=query_checker_prompt
)
query_checker_inputs = {
"query": sql_cmd,