Examples with BUCKET_COLUMN_NAME com.facebook.presto.hive.HiveColumnHandle.BUCKET_COLUMN_NAME used on opensource projects

Example 1 with BUCKET_COLUMN_NAME

use of com.facebook.presto.hive.HiveColumnHandle.BUCKET_COLUMN_NAME in project presto by prestodb.

the class HiveMetadata method columnMetadataGetter.

private static Function<HiveColumnHandle, ColumnMetadata> columnMetadataGetter(Table table, TypeManager typeManager) {
    ImmutableList.Builder<String> columnNames = ImmutableList.builder();
    table.getPartitionColumns().stream().map(Column::getName).forEach(columnNames::add);
    table.getDataColumns().stream().map(Column::getName).forEach(columnNames::add);
    List<String> allColumnNames = columnNames.build();
    if (allColumnNames.size() > Sets.newHashSet(allColumnNames).size()) {
        throw new PrestoException(HIVE_INVALID_METADATA, format("Hive metadata for table %s is invalid: Table descriptor contains duplicate columns", table.getTableName()));
    }
    List<Column> tableColumns = table.getDataColumns();
    ImmutableMap.Builder<String, Optional<String>> builder = ImmutableMap.builder();
    for (Column field : concat(tableColumns, table.getPartitionColumns())) {
        if ((field.getComment() != null) && !Optional.of("from deserializer").equals(field.getComment())) {
            builder.put(field.getName(), field.getComment());
        } else {
            builder.put(field.getName(), Optional.empty());
        }
    }
    // add hidden columns
    builder.put(PATH_COLUMN_NAME, Optional.empty());
    if (table.getStorage().getBucketProperty().isPresent()) {
        builder.put(BUCKET_COLUMN_NAME, Optional.empty());
    }
    Map<String, Optional<String>> columnComment = builder.build();
    return handle -> new ColumnMetadata(handle.getName(), typeManager.getType(handle.getTypeSignature()), columnComment.get(handle.getName()).orElse(null), columnExtraInfo(handle.isPartitionKey()), handle.isHidden());
}