fpompermaier opened a new pull request #11914:
URL: https://github.com/apache/flink/pull/11914
## What is the purpose of the change
Fix error when handling numeric field types with precision 0, such as:
```sql
CREATE TABLE orders(
ord_no integer PRIMARY KEY,
ord_date date,
item_name character(35),
item_grade character(1),
ord_qty numeric,
ord_amount numeric,
CONSTRAINT unq_ordno_itname UNIQUE(ord_qty,ord_amount)
);
```
This address the same problem of SPARK-26538
(https://github.com/apache/spark/pull/23456), using the same fix.
## Brief change log
In the PostgresCatalog.fromJDBCType, handle Decimal and Numeric types as
follow:
```java
if (precision > 0) {
return DataTypes.DECIMAL(precision, metadata.getScale(colIndex));
}
return DataTypes.DECIMAL(DecimalType.MAX_PRECISION, 18);
```
## Verifying this change
This change is already covered by existing tests, such as
*PostgresCatalogITCase*.
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): **no**
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: **no**
- The serializers: **no**
- The runtime per-record code paths (performance sensitive): **no**
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn/Mesos, ZooKeeper: **no**
- The S3 file system connector: **no**
## Documentation
- Does this pull request introduce a new feature? **no**
- If yes, how is the feature documented? not documented
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