How Can I Reveal the Raw, Compiled SQL from a SQLAlchemy Query?

Revealing the Raw, Compiled SQL Behind a SQLAlchemy Expression

When working with a SQLAlchemy query object, it can be desirable to obtain the actual, compiled SQL statement to gain insights into the underlying database operation. However, retrieving this raw query with parameters fully bound can prove challenging.

One approach is to harness the literal_binds argument within compile_kwargs when compiling the query statement. As illustrated below:

print(q.statement.compile(compile_kwargs={"literal_binds": True}))

This method outputs the compiled SQL query with parameters directly inserted, effectively removing the need for placeholders such as %s. However, it's crucial to note that this technique is limited to simple types like integers and strings. If a bindparam() without a predefined value is used, it will not be included in the output.

The documentation emphasizes exercising caution when employing this approach with untrusted input. It advises against using this technique with user-supplied data, as SQLAlchemy's mechanisms for coercing Python values into SQL strings lack security against untrusted input. Instead, it strongly advocates the use of bound parameters for programmatic invocation of non-DDL SQL statements.

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