This pr makes three changes to the display of complex types：
1. NULL value in complex types refers to being displayed as `null`, not `NULL`
2. struct type is displayed as "column_name": column_value
3. Time types such as `datetime` and `date`, are displayed with double quotes in complex types. like
`{1, "2023-10-26 12:12:12"}`
This pr also do a code refactor:
1. nesting_level is set to a member variable of the `DataTypeSerDe`, rather than a parameter in methods.
What's more, this pr fix a bug that fileSize is not correct, introduced by this pr: #25854
Co-authored-by: sohardforaname <organic_chemistry@foxmail.com>
TODO:
1. support agg_state type
2. support implicit cast literal exception
3. use nereids execute dml for these regression cases:
- test_agg_state_nereids (for TODO 1)
- test_array_insert_overflow (for TODO 2)
- nereids_p0/json_p0/test_json_load_and_function (for TODO 2)
- nereids_p0/json_p0/test_json_unique_load_and_function (for TODO 2)
- nereids_p0/jsonb_p0/test_jsonb_load_and_function (for TODO 2)
- nereids_p0/jsonb_p0/test_jsonb_unique_load_and_function (for TODO 2)
- json_p0/test_json_load_and_function (for TODO 2)
- json_p0/test_json_unique_load_and_function (for TODO 2)
- jsonb_p0/test_jsonb_load_and_function (for TODO 2)
- jsonb_p0/test_jsonb_unique_load_and_function (for TODO 2)
- test_multi_partition_key (for TODO 2)
Now we can not support streamload with column which is map/array nested map/array
serde can do this now , so we can replace it
Notice. if item data in complex type data is empty we just return error, instead of makeup default value , because now we can not define right default for complex type
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 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
fe foldconstRule make array() function expr with const literal , and would not pass this array literal to be . but we should make fe array string output format is same with be array string output
