fix: Add WITH ORDER display in information_schema.views (#18282)

## Which issue does this PR close?

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- Closes #18267.
/cc @NGA-TRAN 
## Rationale for this change

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in the issue then this section is not needed.
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The `information_schema.views` does not have display `WITH ORDER` for
the definition of a table.

## What changes are included in this PR?

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is sometimes worth providing a summary of the individual changes in this
PR.
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Added condition for writing `WITH ORDER` for CreateExternalTable.

## Are these changes tested?

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2. Serve as another way to document the expected behavior of the code

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Did not add tests for this functionality as not other display
functionality has tests and seems like a separate PR would be
appropriate if this is needed.

This was tested manually with:

In `datafusion-cli`

```
-- Not sorted
CREATE EXTERNAL TABLE  dimension_csv
STORED AS CSV 
LOCATION '/path/to/the/attached/dimension_1.csv'
OPTIONS ('format.has_header' 'true');

-- Sorted
CREATE EXTERNAL TABLE  dimension_csv_sorted
STORED AS CSV 
WITH ORDER (env, service, host)
LOCATION '/path/to/the/attached/dimension_1.csv'
OPTIONS ('format.has_header' 'true');
```
Then running:
```
select * from information_schema.views;
```
With link to data:
[dimension_1.csv](https://github.com/user-attachments/files/23124138/dimension_1.csv)
## Are there any user-facing changes?

Yes, improves the information_schema.views display to include `WITH
ORDER`
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updated before approving the PR.
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change` label.
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Author: gene-bordegaray

datafusion/sql/src/parser.rs

@@ -243,7 +243,19 @@ impl fmt::Display for CreateExternalTable {
         }
         write!(f, "{} ", self.name)?;
         write!(f, "STORED AS {} ", self.file_type)?;
-        write!(f, "LOCATION {} ", self.location)
+        if !self.order_exprs.is_empty() {
+            write!(f, "WITH ORDER (")?;
+            let mut first = true;
+            for expr in self.order_exprs.iter().flatten() {
+                if !first {
+                    write!(f, ", ")?;
+                }
+                write!(f, "{expr}")?;
+                first = false;
+            }
+            write!(f, ") ")?;
+        }
+        write!(f, "LOCATION {}", self.location)
     }
 }
 

datafusion/sqllogictest/test_files/information_schema.slt

@@ -705,6 +705,54 @@ SHOW CREATE TABLE abc;
 ----
 datafusion public abc CREATE EXTERNAL TABLE abc STORED AS CSV LOCATION ../../testing/data/csv/aggregate_test_100.csv
 
+# show_external_create_table_with_order
+statement ok
+CREATE EXTERNAL TABLE abc_ordered
+STORED AS CSV
+WITH ORDER (c1)
+LOCATION '../../testing/data/csv/aggregate_test_100.csv'
+OPTIONS ('format.has_header' 'true');
+
+query TTTT
+SHOW CREATE TABLE abc_ordered;
+----
+datafusion public abc_ordered CREATE EXTERNAL TABLE abc_ordered STORED AS CSV WITH ORDER (c1) LOCATION ../../testing/data/csv/aggregate_test_100.csv
+
+statement ok
+DROP TABLE abc_ordered;
+
+# show_external_create_table_with_multiple_order_columns
+statement ok
+CREATE EXTERNAL TABLE abc_multi_order
+STORED AS CSV
+WITH ORDER (c1, c2 DESC)
+LOCATION '../../testing/data/csv/aggregate_test_100.csv'
+OPTIONS ('format.has_header' 'true');
+
+query TTTT
+SHOW CREATE TABLE abc_multi_order;
+----
+datafusion public abc_multi_order CREATE EXTERNAL TABLE abc_multi_order STORED AS CSV WITH ORDER (c1, c2 DESC) LOCATION ../../testing/data/csv/aggregate_test_100.csv
+
+statement ok
+DROP TABLE abc_multi_order;
+
+# show_external_create_table_with_order_nulls
+statement ok
+CREATE EXTERNAL TABLE abc_order_nulls
+STORED AS CSV
+WITH ORDER (c1 NULLS LAST, c2 DESC NULLS FIRST)
+LOCATION '../../testing/data/csv/aggregate_test_100.csv'
+OPTIONS ('format.has_header' 'true');
+
+query TTTT
+SHOW CREATE TABLE abc_order_nulls;
+----
+datafusion public abc_order_nulls CREATE EXTERNAL TABLE abc_order_nulls STORED AS CSV WITH ORDER (c1 NULLS LAST, c2 DESC NULLS FIRST) LOCATION ../../testing/data/csv/aggregate_test_100.csv
+
+statement ok
+DROP TABLE abc_order_nulls;
+
 # string_agg has different arg_types but same return type. Test avoiding duplicate entries for the same function.
 query TTT
 select routine_name, data_type, function_type from information_schema.routines where routine_name = 'string_agg';