No major performance impact, more of a learning example for myself (had +3000 join order badness).
Initial tuple counts
```
Evaluated recursive predicate SqlAlchemy::SqlAlchemy::Connection::ConnectionConstruction#45e716e0@594cfx2g in 1ms on iteration 1 (delta size: 4).
Evaluated relational algebra for predicate SqlAlchemy::SqlAlchemy::Connection::ConnectionConstruction#45e716e0@594cfx2g on iteration 1 running pipeline base with tuple counts:
37793 ~0% {3} r1 = JOIN `ApiGraphs::API::Node.getACall/0#dispred#312deb92_10#join_rhs` WITH DataFlowPublic::CallCfgNode#b8ddbf81 ON FIRST 1 OUTPUT Lhs.1, Lhs.0, Rhs.1
0 ~0% {2} | JOIN WITH `SqlAlchemy::SqlAlchemy::Connection::classRef/0#565fc3ad` ON FIRST 1 OUTPUT Lhs.1, Lhs.2
30 ~0% {5} r2 = JOIN DataFlowPublic::CallCfgNode#b8ddbf81 WITH `DataFlowPublic::MethodCallNode.calls/2#dispred#1dd1e0f4#ffb` ON FIRST 1 OUTPUT Lhs.0, Lhs.1, Rhs.1, Rhs.2, _
{4} | REWRITE WITH NOT [NOT [Tmp.4 := "begin", TEST InOut.3 = Tmp.4], NOT [Tmp.4 := "connect", TEST InOut.3 = Tmp.4]] KEEPING 4
21 ~0% {3} | SCAN OUTPUT In.2, In.0, In.1
4 ~0% {2} | JOIN WITH `SqlAlchemy::SqlAlchemy::Engine::instance/0#1828baef` ON FIRST 1 OUTPUT Lhs.1, Lhs.2
4 ~0% {2} r3 = r1 UNION r2
return r3
```
which is fixed by the only_bind_out
```
Evaluated recursive predicate SqlAlchemy::SqlAlchemy::Connection::ConnectionConstruction#45e716e0@49effxtg in 0ms on iteration 1 (delta size: 0).
Evaluated relational algebra for predicate SqlAlchemy::SqlAlchemy::Connection::ConnectionConstruction#45e716e0@49effxtg on iteration 1 running pipeline base with tuple counts:
0 ~0% {1} r1 = JOIN `SqlAlchemy::SqlAlchemy::Connection::classRef/0#565fc3ad` WITH `ApiGraphs::API::Node.getACall/0#dispred#312deb92` ON FIRST 1 OUTPUT Rhs.1
0 ~0% {2} | JOIN WITH DataFlowPublic::CallCfgNode#b8ddbf81 ON FIRST 1 OUTPUT Lhs.0, Rhs.1
return r1
```
We also had this initial problem
```
Evaluated recursive predicate SqlAlchemy::SqlAlchemy::Connection::ConnectionConstruction#45e716e0@594cfx2g in 1ms on iteration 4 (delta size: 0).
Evaluated relational algebra for predicate SqlAlchemy::SqlAlchemy::Connection::ConnectionConstruction#45e716e0@594cfx2g on iteration 4 running pipeline standard with tuple counts:
48722 ~6% {2} r1 = DataFlowPublic::CallCfgNode#b8ddbf81 AND NOT SqlAlchemy::SqlAlchemy::Connection::ConnectionConstruction#45e716e0#prev(FIRST 2)
48722 ~3% {3} r2 = SCAN r1 OUTPUT In.0, _, In.1
48722 ~1% {3} | REWRITE WITH Out.1 := "connect"
16 ~0% {3} | JOIN WITH `DataFlowPublic::MethodCallNode.calls/2#dispred#1dd1e0f4#ffb_021#join_rhs` ON FIRST 2 OUTPUT Rhs.2, Lhs.0, Lhs.2
0 ~0% {2} | JOIN WITH `SqlAlchemy::SqlAlchemy::Connection::instance/0#5ed87c17#prev_delta` ON FIRST 1 OUTPUT Lhs.1, Lhs.2
48722 ~3% {3} r3 = SCAN r1 OUTPUT In.0, _, In.1
48722 ~2% {3} | REWRITE WITH Out.1 := "execution_options"
9 ~0% {3} | JOIN WITH `DataFlowPublic::MethodCallNode.calls/2#dispred#1dd1e0f4#ffb_021#join_rhs` ON FIRST 2 OUTPUT Rhs.2, Lhs.0, Lhs.2
0 ~0% {2} | JOIN WITH `SqlAlchemy::SqlAlchemy::Connection::instance/0#5ed87c17#prev_delta` ON FIRST 1 OUTPUT Lhs.1, Lhs.2
0 ~0% {2} r4 = r2 UNION r3
return r4
```
which is fixed by `connectionConstruction_helper`
```
Evaluated recursive predicate SqlAlchemy::SqlAlchemy::Connection::helper/0#62cfc178#b@4f295yef in 1ms on iteration 4 (delta size: 0).
Evaluated relational algebra for predicate SqlAlchemy::SqlAlchemy::Connection::helper/0#62cfc178#b@4f295yef on iteration 4 running pipeline standard with tuple counts:
4 ~0% {1} r1 = JOIN `SqlAlchemy::SqlAlchemy::Connection::instance/1#029b4c87#prev_delta` WITH `TypeTrackingImpl::TypeTracker::end/0#2ac2cfd4` ON FIRST 1 OUTPUT Lhs.1
16 ~0% {1} | JOIN WITH `LocalSources::Cached::hasLocalSource/2#8b3ee0ec_10#join_rhs` ON FIRST 1 OUTPUT Rhs.1
0 ~0% {3} | JOIN WITH `DataFlowPublic::MethodCallNode.calls/2#dispred#1dd1e0f4#ffb_102#join_rhs` ON FIRST 1 OUTPUT Rhs.1, Rhs.2, _
0 ~0% {2} | REWRITE WITH NOT [NOT [Tmp.2 := "connect", TEST InOut.1 = Tmp.2], NOT [Tmp.2 := "execution_options", TEST InOut.1 = Tmp.2]] KEEPING 2
0 ~0% {1} | JOIN WITH DataFlowPublic::CallCfgNode#b8ddbf81 ON FIRST 1 OUTPUT Lhs.0
0 ~0% {1} | AND NOT `SqlAlchemy::SqlAlchemy::Connection::helper/0#62cfc178#b#prev`(FIRST 1)
return r1
```
CodeQL
This open source repository contains the standard CodeQL libraries and queries that power GitHub Advanced Security and the other application security products that GitHub makes available to its customers worldwide.
How do I learn CodeQL and run queries?
There is extensive documentation on getting started with writing CodeQL using the CodeQL extension for Visual Studio Code and the CodeQL CLI.
Contributing
We welcome contributions to our standard library and standard checks. Do you have an idea for a new check, or how to improve an existing query? Then please go ahead and open a pull request! Before you do, though, please take the time to read our contributing guidelines. You can also consult our style guides to learn how to format your code for consistency and clarity, how to write query metadata, and how to write query help documentation for your query.
For information on contributing to CodeQL documentation, see the "contributing guide" for docs.
License
The code in this repository is licensed under the MIT License by GitHub.
The CodeQL CLI (including the CodeQL engine) is hosted in a different repository and is licensed separately. If you'd like to use the CodeQL CLI to analyze closed-source code, you will need a separate commercial license; please contact us for further help.
Visual Studio Code integration
If you use Visual Studio Code to work in this repository, there are a few integration features to make development easier.
CodeQL for Visual Studio Code
You can install the CodeQL for Visual Studio Code extension to get syntax highlighting, IntelliSense, and code navigation for the QL language, as well as unit test support for testing CodeQL libraries and queries.
Tasks
The .vscode/tasks.json file defines custom tasks specific to working in this repository. To invoke one of these tasks, select the Terminal | Run Task... menu option, and then select the desired task from the dropdown. You can also invoke the Tasks: Run Task command from the command palette.