SQL Template Matcher

[anisbhsl]

Description

Current implementation uses SQL agent to generate SQL statement when provided with user query. This is inconsistent and it is difficult to railguard the response. To prevent this, create a SQLTemplateMatcher as base class which will have following base classes

1. FuzzySQLTemplateMatcher : Rule based query to SQL statement
2. LLMBasedSQLTemplateMatcher : LLM based query to SQL template matcher with entity extraction

Refer to this boilerplate for base class:

class SQLTemplateMatcher:
    def __init__(self, ...):
    ...

    def add_query_template(self, query, sql_statement):
     ...

    def match(self, query) -> list:
         return top k matched sql statements along with entity substition (or we can do subsition in another step)

The constructor could take: table schema, sql templates

Deliverables

• Base Matcher Class
• LLM Based SQL Template Matcher
• Fuzzy SQL Template Matcher

### Tasks
- [ ] https://github.com/NASA-IMPACT/larch/issues/3
- [ ] https://github.com/NASA-IMPACT/larch/issues/4