Rust: Fix bad join

[hvitved]

Before

Pipeline standard for ElementImpl::Impl::MacroExpansion::isFromMacroExpansion/1#69965d18@7580bdbj was evaluated in 205 iterations totaling 49106ms (delta sizes total: 1254645).
        8014745124  ~4%    {1} r1 = AstNodeImpl::Impl::AstNode#22e758cf AND NOT `ElementImpl::Impl::MacroExpansion::isFromMacroExpansion/1#69965d18#prev`(FIRST 1)
         822416474  ~0%    {2}    | JOIN WITH `ElementImpl::Impl::MacroExpansion::getImmediatelyEnclosingMacroInvocation/1#1eb32ecc` ON FIRST 1 OUTPUT Rhs.1, Lhs.0
           1254645  ~0%    {1}    | JOIN WITH `ElementImpl::Impl::MacroExpansion::isFromMacroExpansion/1#69965d18#prev_delta` ON FIRST 1 OUTPUT Lhs.1
                           return r1

After

Pipeline standard for ElementImpl::Impl::MacroExpansion::isFromMacroExpansion/1#69965d18@f39b84ka was evaluated in 205 iterations totaling 138ms (delta sizes total: 1254645).
        4675568  ~0%    {1} r1 = JOIN `ElementImpl::Impl::MacroExpansion::isFromMacroExpansion/1#69965d18#prev_delta` WITH `ElementImpl::Impl::MacroExpansion::getImmediatelyEnclosingMacroInvocation/1#1eb32ecc_10#join_rhs` ON FIRST 1 OUTPUT Rhs.1
        4672186  ~0%    {1}    | JOIN WITH AstNodeImpl::Impl::AstNode#22e758cf ON FIRST 1 OUTPUT Lhs.0
        1254645  ~0%    {1}    | AND NOT `ElementImpl::Impl::MacroExpansion::isFromMacroExpansion/1#69965d18#prev`(FIRST 1)
                        return r1

DCA looks good.

[Copilot]

Pull Request Overview

This PR optimizes the performance of a QL predicate by adding a pragma[only_bind_into] directive to improve query evaluation efficiency. The change reduces execution time from 49106ms to 138ms (a ~355x speedup).

Key Changes:

• Added pragma[only_bind_into] to the recursive call in isFromMacroExpansion predicate to optimize the join order

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[geoffw0]

LGTM, thanks for fixing. :)