sachinnn99 opened a new pull request, #10970:
URL: https://github.com/apache/gravitino/pull/10970
### What changes were proposed in this pull request?
Add type mappings for PostgreSQL's `serial`, `smallserial`, and `bigserial`
type aliases (and their shorthand forms `serial2`, `serial4`, `serial8`) in
`PostgreSqlTypeConverter.toGravitino()`.
### Why are the changes needed?
When the JDBC driver reports `serial`/`smallserial`/`bigserial` as the
TYPE_NAME, the converter falls through to `ExternalType.of("serial")`. The
Trino connector has no mapping for `EXTERNAL` types, causing queries to fail
with:
```
Unsupported gravitino datatype: external(serial)
```
These types are aliases for `int2`/`int4`/`int8` with an auto-increment
sequence, so they should map to `ShortType`/`IntegerType`/`LongType`
respectively.
Fix: #10957
### Does this PR introduce _any_ user-facing change?
No API changes. PostgreSQL tables with serial columns can now be queried
through Trino without errors.
### How was this patch tested?
Added unit test assertions for all 6 serial type variants in
`TestPostgreSqlTypeConverter.testToGravitinoType()`.
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