In SQL syntax, `col != ''` equals `col.length() > 0`.
It means that this column must exist in ES doc fields and its content is not empty.
In this PR, we make a special translation for this binary predicate to keep the behavior of both consistent.
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Co-authored-by: Luennng <luennng@gmail.com>
1. add volume for es logs
2. optimize health check, waiting for es status to be green
3. fix es6 valume path error
4. optimize disk watermark to avoid es disk watermark error
5. fix es6 create index error
6. add custom elasticsearch.yml for es6
7. add log4j2.properties for es6, es7, es8
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
1. Add support for Doris to parse ES date field without time zone info. eg: `2023-04-17T23:01:18.151`, this time will be treated as UTC time, since ES assumes that the time zone for time fields without time zones is UTC.
2. Change local time zone convertion from system local time zone to session variable time zone.
Issue Number: close#24315
The root cause of this issue is that Elasticsearch's long type allows inserting floats and strings. Doris did not handle these cases when doing type conversion. The current strategy is to take the integer before the decimal point if a float or string is found.
sort out the test cases of external table.
After modify, there are 2 directories:
1. `external_table_p0`: all p0 cases of external tables: hive, es, jdbc and tvf
2. `external_table_p2`: all p2 cases of external tables: hive, es, mysql, pg, iceberg and tvf
So that we can run it with one line command like:
```
sh run-regression-test.sh --run -d external_table_p0,external_table_p2
```
