samredai edited a comment on pull request #4318:
URL: https://github.com/apache/iceberg/pull/4318#issuecomment-1082617851
Added an `IndexByName` visitor and did a comparison with the java client
which produces the same result.
```java
import org.apache.iceberg.Schema;
import org.apache.iceberg.types.Types;
import org.apache.iceberg.types.TypeUtil;
Schema schema = new Schema(
Types.NestedField.required(1, "foo", Types.StringType.get()),
Types.NestedField.optional(2, "bar", Types.IntegerType.get()),
Types.NestedField.required(3, "baz", Types.BooleanType.get()),
Types.NestedField.required(4, "qux", Types.ListType.ofOptional(5,
Types.StringType.get())),
Types.NestedField.required(6, "quux", Types.MapType.ofOptional(7, 8,
Types.StringType.get(), Types.MapType.ofOptional(9, 10, Types.StringType.get(),
Types.IntegerType.get())))
);
Map<String, Integer> index = TypeUtil.indexByName(schema.asStruct());
System.out.println(index);
```
output:
```
{foo=1, bar=2, baz=3, qux=4, qux.element=5, quux=6, quux.key=7,
quux.value=8, quux.value.key=9, quux.value.value=10}
```
```py
from iceberg.types import (
BooleanType,
IntegerType,
ListType,
MapType,
NestedField,
StringType,
StructType,
)
from iceberg.table.schema import Schema, index_by_name
schema = Schema(
NestedField(field_id=1, name="foo", field_type=StringType(),
is_optional=False),
NestedField(field_id=2, name="bar", field_type=IntegerType(),
is_optional=True),
NestedField(field_id=3, name="baz", field_type=BooleanType(),
is_optional=False),
NestedField(field_id=4, name="qux", field_type=ListType(element_id=5,
element_type=StringType(), element_is_optional=True), is_optional=True),
NestedField(field_id=6, name="quux", field_type=MapType(key_id=7,
key_type=StringType(), value_id=8, value_type=MapType(key_id=9,
key_type=StringType(), value_id=10, value_type=IntegerType(),
value_is_optional=True), value_is_optional=True), is_optional=True)
)
index = index_by_name(schema)
print(index)
```
output:
```
{'foo': 1, 'bar': 2, 'baz': 3, 'qux': 4, 'qux.element': 5, 'quux': 6,
'quux.key': 7, 'quux.value': 8, 'quux.value.key': 9, 'quux.value.value': 10}
```
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