gavinchou opened a new pull request, #60608:
URL: https://github.com/apache/doris/pull/60608
This is an improvement for debug tool meta_tool.
Add new operation show_segment_data to meta_tool for reading and displaying
segment file column metadata and statistics.
- Add get_field_type_string() to convert FieldType to readable string
- Add get_encoding_string() to convert EncodingTypePB to readable string
- Add get_compression_string() to convert CompressionTypePB to readable
string
- Add print_column_meta() to print column metadata recursively
- Add show_segment_data() to display segment file info and statistics
This allows users to inspect segment file structure without requiring the
full tablet schema.
```
meta_tool --operation=show_segment_data
--file=020000000000004fd4412b500cb0833afcc5dd12e833c59b_0.dat
=== Segment File Info ===
File: 020000000000004fd4412b500cb0833afcc5dd12e833c59b_0.dat
Num Rows: 2
Num Columns: 16
Compression: LZ4F
=== column_id_0: type=VARCHAR, nullable=false, encoding=DICT_ENCODING ===
Dictionary Page: offset=56, size=53 bytes
Indexes: ORDINAL, ZONE_MAP
Data Values (2 of 2 rows, showing first 2):
[0] '10023--1-id'
[1] '10023--1-score'
=== column_id_1: type=VARCHAR, nullable=false, encoding=DICT_ENCODING ===
Dictionary Page: offset=164, size=25 bytes
Indexes: ORDINAL, ZONE_MAP
Data Values (2 of 2 rows, showing first 2):
[0] '0'
[1] '0'
...
```
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