suxiaogang223 opened a new pull request, #42200:
URL: https://github.com/apache/doris/pull/42200
## Proposed changes
Add regression-test cases for hive text table properties:
| **Property** | **Description**
| **Example Value** | **Supported in Doris** |
|------------------------------|---------------------------------------------------------------------|-------------------|----------------------|
| `field.delim` | Defines the delimiter between columns in
each row. | `\1` | Yes |
| `collection.delim` | Defines the delimiter for items in an array
(collection type). | `\2` | Yes |
| `mapkey.delim` | Defines the delimiter between keys and
values in a map. | `\3` | Yes |
| `serialization.null.format` | Defines how `NULL` values are represented
in the text file. | `\\N` | Yes |
| `escape.delim` | Specifies the escape character used for
escaping special characters.| `\\` | Yes |
| `line.delim` | Defines the delimiter between rows or lines
in the file. | `\n` | Yes |
### Explanation:
- **`field.delim`**: This property is used to specify how columns are
separated in a row. For example, `\1` indicates the delimiter is a
non-printable character.
- **`collection.delim`**: Used to define how elements in an array or
collection are separated. In this case, `\2` is used as a separator.
- **`mapkey.delim`**: This property defines how keys and values in a map are
separated. For instance, `\3` is used to separate map keys and values.
- **`serialization.null.format`**: This setting specifies the format for
`NULL` values in the data. `\\N` is commonly used to represent `NULL`.
- **`escape.delim`**: Defines the escape character used in the text file for
escaping special characters, such as the delimiter itself. Here, `\\` is used
as the escape character.
- **`line.delim`**: This property is used to specify the delimiter between
lines or rows. Typically, `\n` (newline) is used as the line delimiter.
**Note**: Unlike the other delimiters, `line.delim` is not escaped. If the
content in the table contains the same character as the line delimiter, it may
cause query errors. However, the other delimiters (`field.delim`,
`collection.delim`, `mapkey.delim`) are escaped, so they will not cause issues.
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