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This patch adds the passing of the current session to the UDTF call. This helps implement session-dependent functions, for example, a function that returns the list of registered tables.
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Rationale for this change
In our project, we have several UDTFs that depend on the session from which they are called -- for example, functions to list views, tables and functions that wrap scan of another table (like composition). To implement them, we need a way to provide the current session state to the UDTF. It would be nice to add the session as an argument to the UDTF call.
What changes are included in this PR?
TableFunctionImpl::call_with_args: it takes structTableFunctionArgs, doing arguments extendable without breaking backward compatibility.TableFunctionImpl::call.call_with_argsfor each UDTF in DF.table_list()that depends on the session state.