fix array index func with decimal
in old analyzer when sql with array_position or array_contains with decimal , may loss precision to which will make result wrong
FEATURE:
1. enable array type in Nereids
2. support generice on function signature
3. support array and map type in type coercion and type check
4. add element_at and element_slice syntax in Nereids parser
REFACTOR:
1. remove AbstractDataType
BUG FIX:
1. remove FROM from nonReserved keyword list
TODO:
1. support lambda expression
2. use Nereids' way do function type coercion
3. use castIfnotSame when do implict cast on BoundFunction
4. let AnyDataType type coercion do same thing as function type coercion
5. add below array function
- array_apply
- array_concat
- array_filter
- array_sortby
- array_exists
- array_first_index
- array_last_index
- array_count
- array_shuffle shuffle
- array_pushfront
- array_pushback
- array_repeat
- array_zip
- reverse
- concat_ws
- split_by_string
- explode
- bitmap_from_array
- bitmap_to_array
- multi_search_all_positions
- multi_match_any
- tokenize
if we write sql with : `select cast(array() as array<varchar(10)>)`
castexpr in fe will call analyze() with `Type.matchExactType(childType, type, true);`
here array type only check contains_null , but should check inner type to make array matchExactType right
if we write sql with : select array(1.0,2.0,null, null,2.0)
here will pass arg type with uint8 to be which does not match array() func sign with deicmal, and make be core. so here should cast from be and make null tag to cast decimal type
count_by_enum(expr1, expr2, ... , exprN);
Treats the data in a column as an enumeration and counts the number of values in each enumeration. Returns the number of enumerated values for each column, and the number of non-null values versus the number of null values.
Problem:
When window function in aggregation function, executor would report an error like: Required field 'node_type' was not present!
Example:
SELECT SUM(MAX(c1) OVER (PARTITION BY c2, c3)) FROM test_window_in_agg;
Reason:
When analyze aggregate, analytic expr (window function carrior when analyze) transfered to slot and loss message. So when
serialize to thrift package, TExpr can not determine node_type of analytic expr.
Solved:
We do not support aggregate(window function) yet. So we report an error when analyze.
Problem:
Select list should be non const when from list have tables or multiple tuples. Or upper query will regard wrong of isConstant
And make wrong constant folding
For example： when using nullif funtion with subquery which result in two alternative constant, planner would treat it as constant expr. So analyzer would report an error of order by clause can not be constant
Solusion:
Change inline view output to non constant, because (select 1 a from table) as view , a in output is no constant when we see
view.a outside
currently, expression: cast('20230631' as date) will be evaluate to 2023-06-30 incorrectly, and '20230632' will be null, we fix the bug and evaluate all the invalid date to null.
Issue Number: close#20669
RewriteInPredicateRule may cast InPredicate expr's two child to the same type, for example: where cast(age as char) in ('11'), the type of age is int, RewriteInPredicateRule will cast expr's two child type to int. As in the example above, child 0 will be such struct:
```
child 0: type: int
|--- child: type : char
|-- child: type : int
```
Due to the RewriteInPredicateRule cast the type of the expr to int, it will reanalyze stmt, but it will reset stmt first before reanalyze the stmt, and reset opt will change child 0 to such struct:
```
child: type : char
|-- child: type : int
```
It cause two child's type will be cast to varchar in func castAllToCompatibleType, the logic of RewriteInPredicateRule will be useless.
In 1.1-lts and 1.2-lts, such case " where cast(age as char) in ('11')" can't work well, because func castAllToCompatibleType will cast int to char but int can't cast to char(master can work well because func castAllToCompatibleType will cast int to varchar in such case).
```
MySQL [test]> select user_id from test_cast where cast(age as char) in ('45');
ERROR 1105 (HY000): errCode = 2, detailMessage = type not match, originType=INT, targeType=CHAR(*)
```
