Implement tree explain for RepartitionExec and WorkTableExec (#15137)

* feat: implement tree rendering for RepartitionExec

Signed-off-by: Alan Tang <jmtangcs@gmail.com>

* feat: implement tree rendering for WorkTableExec

Signed-off-by: Alan Tang <jmtangcs@gmail.com>

* bug: fix clippy error

Signed-off-by: Alan Tang <jmtangcs@gmail.com>

---------

Signed-off-by: Alan Tang <jmtangcs@gmail.com>
Co-authored-by: Andrew Lamb <andrew@nerdnetworks.org>

Author: Standing-Man

datafusion/physical-plan/src/repartition/mod.rs

@@ -507,8 +507,16 @@ impl DisplayAs for RepartitionExec {
                 Ok(())
             }
             DisplayFormatType::TreeRender => {
-                // TODO: collect info
-                write!(f, "")
+                writeln!(f, "partitioning_scheme={}", self.partitioning(),)?;
+                writeln!(
+                    f,
+                    "output_partition_count={}",
+                    self.input.output_partitioning().partition_count()
+                )?;
+                if self.preserve_order {
+                    writeln!(f, "preserve_order={}", self.preserve_order)?;
+                }
+                Ok(())
             }
         }
     }

datafusion/physical-plan/src/work_table.rs

@@ -163,8 +163,7 @@ impl DisplayAs for WorkTableExec {
                 write!(f, "WorkTableExec: name={}", self.name)
             }
             DisplayFormatType::TreeRender => {
-                // TODO: collect info
-                write!(f, "")
+                write!(f, "name={}", self.name)
             }
         }
     }