[DRAFT] update PushedDown to have 3 states

[jayshrivastava]

Which issue does this PR close?

• Closes Make filter pushdown API more precise for their purpose #18856

Rationale for this change

What changes are included in this PR?

Are these changes tested?

Are there any user-facing changes?

[github-actions]

Thank you for opening this pull request!

Reviewer note: cargo-semver-checks reported the current version number is not SemVer-compatible with the changes in this pull request (compared against the base branch).

Details

     Cloning apache/main
    Building datafusion v55.0.0 (current)
       Built [  59.951s] (current)
     Parsing datafusion v55.0.0 (current)
      Parsed [   0.034s] (current)
    Building datafusion v55.0.0 (baseline)
       Built [  58.261s] (baseline)
     Parsing datafusion v55.0.0 (baseline)
      Parsed [   0.033s] (baseline)
    Checking datafusion v55.0.0 -> v55.0.0 (no change; assume patch)
     Checked [   0.635s] 223 checks: 223 pass, 31 skip
     Summary no semver update required
    Finished [ 120.562s] datafusion
    Building datafusion-datasource v55.0.0 (current)
       Built [  42.173s] (current)
     Parsing datafusion-datasource v55.0.0 (current)
      Parsed [   0.031s] (current)
    Building datafusion-datasource v55.0.0 (baseline)
       Built [  42.065s] (baseline)
     Parsing datafusion-datasource v55.0.0 (baseline)
      Parsed [   0.031s] (baseline)
    Checking datafusion-datasource v55.0.0 -> v55.0.0 (no change; assume patch)
     Checked [   0.254s] 223 checks: 223 pass, 31 skip
     Summary no semver update required
    Finished [  85.658s] datafusion-datasource
    Building datafusion-datasource-parquet v55.0.0 (current)
       Built [  47.837s] (current)
     Parsing datafusion-datasource-parquet v55.0.0 (current)
      Parsed [   0.032s] (current)
    Building datafusion-datasource-parquet v55.0.0 (baseline)
       Built [  47.783s] (baseline)
     Parsing datafusion-datasource-parquet v55.0.0 (baseline)
      Parsed [   0.033s] (baseline)
    Checking datafusion-datasource-parquet v55.0.0 -> v55.0.0 (no change; assume patch)
     Checked [   0.165s] 223 checks: 223 pass, 31 skip
     Summary no semver update required
    Finished [  96.886s] datafusion-datasource-parquet
    Building datafusion-physical-optimizer v55.0.0 (current)
       Built [  39.441s] (current)
     Parsing datafusion-physical-optimizer v55.0.0 (current)
      Parsed [   0.021s] (current)
    Building datafusion-physical-optimizer v55.0.0 (baseline)
       Built [  40.382s] (baseline)
     Parsing datafusion-physical-optimizer v55.0.0 (baseline)
      Parsed [   0.022s] (baseline)
    Checking datafusion-physical-optimizer v55.0.0 -> v55.0.0 (no change; assume patch)
     Checked [   0.113s] 223 checks: 223 pass, 31 skip
     Summary no semver update required
    Finished [  80.937s] datafusion-physical-optimizer
    Building datafusion-physical-plan v55.0.0 (current)
       Built [  37.796s] (current)
     Parsing datafusion-physical-plan v55.0.0 (current)
      Parsed [   0.149s] (current)
    Building datafusion-physical-plan v55.0.0 (baseline)
       Built [  37.772s] (baseline)
     Parsing datafusion-physical-plan v55.0.0 (baseline)
      Parsed [   0.149s] (baseline)
    Checking datafusion-physical-plan v55.0.0 -> v55.0.0 (no change; assume patch)
     Checked [   0.685s] 223 checks: 221 pass, 2 fail, 0 warn, 31 skip

--- failure enum_variant_added: enum variant added on exhaustive enum ---

Description:
A publicly-visible enum without #[non_exhaustive] has a new variant.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#enum-variant-new
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.50.0/src/lints/enum_variant_added.ron

Failed in:
  variant PushedDown:Exact in /home/runner/work/datafusion/datafusion/datafusion/physical-plan/src/filter_pushdown.rs:146
  variant PushedDown:Inexact in /home/runner/work/datafusion/datafusion/datafusion/physical-plan/src/filter_pushdown.rs:150
  variant PushedDown:Unsupported in /home/runner/work/datafusion/datafusion/datafusion/physical-plan/src/filter_pushdown.rs:152

--- failure enum_variant_missing: pub enum variant removed or renamed ---

Description:
A publicly-visible enum has at least one variant that is no longer available under its prior name. It may have been renamed or removed entirely.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#item-remove
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.50.0/src/lints/enum_variant_missing.ron

Failed in:
  variant PushedDown::Yes, previously in file /home/runner/work/datafusion/datafusion/target/semver-checks/git-apache_main/2dedd5ae688eb3e8fff5cea485f507d572c5bedc/datafusion/physical-plan/src/filter_pushdown.rs:128
  variant PushedDown::No, previously in file /home/runner/work/datafusion/datafusion/target/semver-checks/git-apache_main/2dedd5ae688eb3e8fff5cea485f507d572c5bedc/datafusion/physical-plan/src/filter_pushdown.rs:130

     Summary semver requires new major version: 2 major and 0 minor checks failed
    Finished [  77.643s] datafusion-physical-plan

[codecov-commenter]

Codecov Report

❌ Patch coverage is 84.61538% with 18 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.26%. Comparing base (dbdc627) to head (4e3209f).
⚠️ Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
datafusion/physical-plan/src/projection.rs	10.00%	0 Missing and 9 partials ⚠️
datafusion/datasource-parquet/src/source.rs	77.77%	2 Missing and 4 partials ⚠️
datafusion/physical-plan/src/filter_pushdown.rs	94.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #24528      +/-   ##
==========================================
- Coverage   81.31%   81.26%   -0.05%     
==========================================
  Files        1117     1117              
  Lines      395911   395917       +6     
  Branches   395911   395917       +6     
==========================================
- Hits       321918   321746     -172     
- Misses      55177    55358     +181     
+ Partials    18816    18813       -3     

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