smallx opened a new pull request #3837:
URL: https://github.com/apache/iceberg/pull/3837
When `CachingCatalog` is enabled, rebuilding table in another catalog or
program may cause `Table UUID does not match` problems. This can be reproduced
by the following code:
```java
sql("CREATE TABLE %s (id bigint NOT NULL, data string) USING iceberg",
tableName);
// load table to CachingCatalog
sql("SELECT count(1) FROM %s", tableName);
// recreate table from another catalog or program
Schema schema = catalog.loadTable(tableIdent).schema();
catalog.dropTable(tableIdent);
catalog.createTable(tableIdent, schema);
// refresh table
sql("REFRESH TABLE %s", tableName);
```
The cache timeout policy introduced by
https://github.com/apache/iceberg/pull/3543 can alleviate this problem by
waiting for a period of time (30s by default). But it would be better to allow
to invalidate the cache immediately and reload the table.
This PR allows the `REFRESH TABLE ...` command to forcibly refresh the cache
if the table is rebuilt from another place.
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