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[iceberg] fast fail when creating table of iceberg with multi key fields #2499

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[iceberg] fast fail when creating table of iceberg with multi key fields #2499

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7 changes: 7 additions & 0 deletions ...ke/fluss-lake-iceberg/src/main/java/org/apache/fluss/lake/iceberg/IcebergLakeCatalog.java
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Original file line number Diff line number Diff line change
Expand Up @@ -98,6 +98,13 @@ protected Catalog getIcebergCatalog() {
@Override
public void createTable(TablePath tablePath, TableDescriptor tableDescriptor, Context context)
throws TableAlreadyExistException {
// validate single key field requirement
List<String> keys = tableDescriptor.getBucketKeys();
checkArgument(
keys.size() == 1,
"Key fields must have exactly one field for iceberg format, but got: %s",
keys);

// convert Fluss table path to iceberg table
boolean isPkTable = tableDescriptor.hasPrimaryKey();
TableIdentifier icebergId = toIcebergTableIdentifier(tablePath);
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