[WIP] storage

[yliang412]

Problem

Summary of changes

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 78.92325% with 184 lines in your changes missing coverage. Please review.

Project coverage is 75.2%. Comparing base (3962965) to head (8bad99c).

Files with missing lines	Patch %	Lines
optd-core/src/memo/persistent_memo.rs	90.1%	56 Missing ⚠️
optd-core/src/operator/relational/physical/mod.rs	0.0%	18 Missing ⚠️
...rc/operator/relational/physical/scan/table_scan.rs	0.0%	13 Missing ⚠️
optd-core/src/operator/relational/logical/join.rs	21.4%	11 Missing ⚠️
optd-core/src/bin/memo_demo.rs	0.0%	10 Missing ⚠️
optd-core/src/operator/relational/logical/mod.rs	80.0%	9 Missing ⚠️
optd-core/src/storage/mod.rs	86.4%	8 Missing ⚠️
...ptd-core/src/operator/relational/logical/filter.rs	33.3%	6 Missing ⚠️
...td-core/src/operator/relational/logical/project.rs	33.3%	6 Missing ⚠️
.../src/operator/relational/physical/filter/filter.rs	0.0%	6 Missing ⚠️
... and 10 more

Additional details and impacted files

Files with missing lines	Coverage Δ
optd-core/src/operator/scalar/constants.rs	100.0% <100.0%> (ø)
optd-core/src/operator/scalar/equal.rs	100.0% <100.0%> (ø)
optd-core/src/storage/sequence.rs	100.0% <100.0%> (ø)
...ore/src/rules/transformation/join_associativity.rs	0.0% <0.0%> (ø)
...ore/src/rules/transformation/join_commutativity.rs	0.0% <0.0%> (ø)
optd-core/src/operator/relational/logical/scan.rs	76.9% <76.9%> (ø)
optd-core/src/operator/scalar/add.rs	0.0% <0.0%> (ø)
optd-core/src/rules/implementation/table_scan.rs	0.0% <0.0%> (ø)
...ptd-core/src/operator/relational/logical/filter.rs	33.3% <33.3%> (ø)
...td-core/src/operator/relational/logical/project.rs	33.3% <33.3%> (ø)
... and 13 more