hililiwei opened a new pull request, #6222:
URL: https://github.com/apache/iceberg/pull/6222
## What is the purpose of the change
Support inspecting table in flink sql.
```
select * from {tableName}${metadataTableName}
```
The '$' syntax borrows from
[Flink-Table-Store](https://github.com/apache/flink-table-store), under the
Flink umbrella.
## Support List
* History
To show table history:
```sql
SELECT * FROM prod.db.table$history;
```
* Metadata Log Entries
To show table metadata log entries:
```sql
SELECT * from prod.db.table$metadata_log_entries;
```
* Snapshots
To show the valid snapshots for a table:
```sql
SELECT * FROM prod.db.table$snapshots;
```
* Files
To show a table's current data files:
```sql
SELECT * FROM prod.db.table$files;
```
* Manifests
To show a table's current file manifests:
```sql
SELECT * FROM prod.db.table$manifests;
```
* Partitions
To show a table's current partitions:
```sql
SELECT * FROM prod.db.table$partitions;
```
* All Metadata Tables
These tables are unions of the metadata tables specific to the current
snapshot, and return metadata across all snapshots.
- - All Data Files
To show all of the table's data files and each file's metadata:
```sql
SELECT * FROM prod.db.table$all_data_files;
```
- - All Manifests
To show all of the table's manifest files:
```sql
SELECT * FROM prod.db.table$all_manifests;
```
- References
To show a table's known snapshot references:
```sql
SELECT * FROM prod.db.table$refs;
```
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