[tamnd]

Summary

A LATERAL part of a join that reads only relations outside the join now runs once for all the tuples of the left side. Before, the executor ran it again for each tuple of the left side when it read any outer relation, even one that context already holds.

Changes

• join_item in rupg-exec/src/scan.rs checks if the right part reads a relation of the left side of its join, not any relation. A part that reads only relations outside the join runs once.
• depends is replaced by depends_on, which takes the relations of the left side.

Known differences

None.

Tests

The tests of lateral, join, from_function, correlated, subquery and outer joins pass. fmt, clippy, the workspace tests and the checks of xtask pass on server1.