more implicit casting for union typed field in logical plan

Author: fang-xing-esql

x-pack/plugin/esql/qa/testFixtures/src/main/resources/union_types.csv-spec

@@ -1640,7 +1640,22 @@ id:integer | name:keyword | count:long
 14         | mmmmm        | 2
 ;
 
-MultiTypedFieldsKeepDropSort
+MultiTypedFieldsEvalKeepSort
+required_capability: implicit_casting_union_typed_numeric_and_date
+
+FROM employees, employees_incompatible
+| Eval x = emp_no
+| KEEP x, languages, hire_date, avg_worked_seconds
+| SORT x, hire_date
+| limit 2
+;
+
+x:long |languages:integer |hire_date:date_nanos     |avg_worked_seconds:unsigned_long
+10001  |2                 |1986-06-26T00:00:00.000Z |268728049
+10001  |2                 |1986-06-26T00:00:00.000Z |268728049
+;
+
+MultiTypedFieldsDropKeepSort
 required_capability: implicit_casting_union_typed_numeric_and_date
 
 FROM employees, employees_incompatible
@@ -1655,13 +1670,13 @@ emp_no:long |languages:integer |hire_date:date_nanos     |avg_worked_seconds:uns
 10001       |2                 |1986-06-26T00:00:00.000Z |268728049
 ;
 
-MultiTypedFieldsRenameKeep
+MultiTypedFieldsRenameKeepSort
 required_capability: implicit_casting_union_typed_numeric_and_date
 
 from employees, employees_incompatible
 | RENAME emp_no as new_emp_no, languages as new_languages, hire_date as new_hire_date, avg_worked_seconds as new_avg_worked_seconds
 | KEEP new_emp_no, new_languages, new_hire_date, new_avg_worked_seconds
-| sort new_emp_no, new_hire_date
+| SORT new_emp_no, new_hire_date
 | limit 2
 ;
 
@@ -1670,7 +1685,7 @@ new_emp_no:long |new_languages:integer |new_hire_date:date_nanos |new_avg_worked
 10001           |2                     |1986-06-26T00:00:00.000Z |268728049
 ;
 
-MultiTypedFieldsEvalKeepSort
+MultiTypedFieldsDropEvalKeepSort
 required_capability: implicit_casting_union_typed_numeric_and_date
 
 FROM employees, employees_incompatible
@@ -1703,3 +1718,102 @@ emp_no:long |hire_date:date_nanos
 10017       | 1993-08-03T00:00:00.000Z
 10017       | 1993-08-03T00:00:00.000Z
 ;
+
+MultiTypedFieldsStatsByNumeric
+required_capability: implicit_casting_union_typed_numeric_and_date
+
+FROM employees, employees_incompatible
+| STATS x=count(emp_no), y=max(hire_date), z=max(height) BY languages
+| SORT languages
+;
+
+x:long | y:date_nanos             | z:double | languages:integer
+30     | 1999-04-30T00:00:00.000Z | 2.06     | 1
+38     | 1995-01-27T00:00:00.000Z | 2.1      | 2
+34     | 1996-11-05T00:00:00.000Z | 2.1      | 3
+36     | 1995-03-13T00:00:00.000Z | 2.0      | 4
+42     | 1994-04-09T00:00:00.000Z | 2.1      | 5
+20     | 1997-05-19T00:00:00.000Z | 2.1      | null
+;
+
+MultiTypedFieldsStatsByDateNanos
+required_capability: implicit_casting_union_typed_numeric_and_date
+
+FROM employees, employees_incompatible
+| STATS x=count(emp_no), y=avg(salary_change), z=max(height) BY hire_date
+| Eval y = round(y, 1), z = round(z, 1)
+| KEEP x, y, z, hire_date
+| SORT hire_date
+| LIMIT 5
+;
+
+x:long | y:double | z:double | hire_date:date_nanos
+2      | null     | 1.9      | 1985-02-18T00:00:00.000Z
+2      | null     | 2.0      | 1985-02-24T00:00:00.000Z
+2      | 3.3      | 2.0      | 1985-05-13T00:00:00.000Z
+2      | 0.2      | 1.8      | 1985-07-09T00:00:00.000Z
+2      | 3.6      | 1.5      | 1985-09-17T00:00:00.000Z
+;
+
+MultiTypedFieldsWhereMvExpandKeepSortNumeric
+required_capability: implicit_casting_union_typed_numeric_and_date
+
+FROM employees, employees_incompatible
+| WHERE emp_no == 10003
+| MV_EXPAND salary_change
+| KEEP emp_no, salary_change
+| EVAL salary_change = round(salary_change, 2)
+| SORT salary_change
+;
+
+emp_no:long | salary_change:double
+10003       | 12.82
+10003       | 12.82
+10003       | 14.68
+10003       | 14.68
+;
+
+MultiTypedFieldsMvExpandKeepSortNumeric
+required_capability: implicit_casting_union_typed_numeric_and_date
+
+FROM employees, employees_incompatible
+| MV_EXPAND salary_change
+| KEEP emp_no, salary_change
+| EVAL salary_change = round(salary_change, 2)
+| SORT emp_no, salary_change
+| LIMIT 10
+;
+
+emp_no:long | salary_change:double
+10001       | 1.19
+10001       | 1.19
+10002       | -7.23
+10002       | -7.23
+10002       | 11.17
+10002       | 11.17
+10003       | 12.82
+10003       | 12.82
+10003       | 14.68
+10003       | 14.68
+;
+
+MultiTypedFieldsEvalLookupJoinNumeric
+required_capability: join_lookup_v12
+required_capability: implicit_casting_union_typed_numeric_and_date
+
+FROM employees, employees_incompatible
+| EVAL language_code = languages
+| LOOKUP JOIN languages_lookup ON language_code
+| WHERE emp_no >= 10091 AND emp_no < 10094
+| KEEP emp_no, language_code, language_name
+| SORT emp_no
+;
+
+emp_no:long | language_code:integer | language_name:keyword
+10091       | 3                     | Spanish
+10091       | 3                     | Spanish
+10092       | 1                     | English
+10092       | 1                     | English
+10093       | 3                     | Spanish
+10093       | 3                     | Spanish
+;