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From cdea2e8ad98995202ce81c9c030f2ae64d73b05a Mon Sep 17 00:00:00 2001
From: edef <edef@edef.eu>
Date: Mon, 30 Oct 2023 08:08:10 +0000
Subject: [PATCH] Support reading arrow::LargeListArray
---
.../Formats/Impl/ArrowColumnToCHColumn.cpp | 33 +++++++++++++++----
1 file changed, 26 insertions(+), 7 deletions(-)
diff --git a/src/Processors/Formats/Impl/ArrowColumnToCHColumn.cpp b/src/Processors/Formats/Impl/ArrowColumnToCHColumn.cpp
index 6f9d49498f2..b93846cd4eb 100644
--- a/src/Processors/Formats/Impl/ArrowColumnToCHColumn.cpp
+++ b/src/Processors/Formats/Impl/ArrowColumnToCHColumn.cpp
@@ -436,6 +436,22 @@ static ColumnPtr readByteMapFromArrowColumn(std::shared_ptr<arrow::ChunkedArray>
return nullmap_column;
}
+template <typename T>
+struct ArrowOffsetArray;
+
+template <>
+struct ArrowOffsetArray<arrow::ListArray>
+{
+ using type = arrow::Int32Array;
+};
+
+template <>
+struct ArrowOffsetArray<arrow::LargeListArray>
+{
+ using type = arrow::Int64Array;
+};
+
+template <typename ArrowListArray>
static ColumnPtr readOffsetsFromArrowListColumn(std::shared_ptr<arrow::ChunkedArray> & arrow_column)
{
auto offsets_column = ColumnUInt64::create();
@@ -444,9 +460,9 @@ static ColumnPtr readOffsetsFromArrowListColumn(std::shared_ptr<arrow::ChunkedAr
for (int chunk_i = 0, num_chunks = arrow_column->num_chunks(); chunk_i < num_chunks; ++chunk_i)
{
- arrow::ListArray & list_chunk = dynamic_cast<arrow::ListArray &>(*(arrow_column->chunk(chunk_i)));
+ ArrowListArray & list_chunk = dynamic_cast<ArrowListArray &>(*(arrow_column->chunk(chunk_i)));
auto arrow_offsets_array = list_chunk.offsets();
- auto & arrow_offsets = dynamic_cast<arrow::Int32Array &>(*arrow_offsets_array);
+ auto & arrow_offsets = dynamic_cast<ArrowOffsetArray<ArrowListArray>::type &>(*arrow_offsets_array);
/*
* CH uses element size as "offsets", while arrow uses actual offsets as offsets.
@@ -602,13 +618,14 @@ static ColumnPtr readColumnWithIndexesData(std::shared_ptr<arrow::ChunkedArray>
}
}
+template <typename ArrowListArray>
static std::shared_ptr<arrow::ChunkedArray> getNestedArrowColumn(std::shared_ptr<arrow::ChunkedArray> & arrow_column)
{
arrow::ArrayVector array_vector;
array_vector.reserve(arrow_column->num_chunks());
for (int chunk_i = 0, num_chunks = arrow_column->num_chunks(); chunk_i < num_chunks; ++chunk_i)
{
- arrow::ListArray & list_chunk = dynamic_cast<arrow::ListArray &>(*(arrow_column->chunk(chunk_i)));
+ ArrowListArray & list_chunk = dynamic_cast<ArrowListArray &>(*(arrow_column->chunk(chunk_i)));
/*
* It seems like arrow::ListArray::values() (nested column data) might or might not be shared across chunks.
@@ -819,12 +836,12 @@ static ColumnWithTypeAndName readColumnFromArrowColumn(
key_type_hint = map_type_hint->getKeyType();
}
}
- auto arrow_nested_column = getNestedArrowColumn(arrow_column);
+ auto arrow_nested_column = getNestedArrowColumn<arrow::ListArray>(arrow_column);
auto nested_column = readColumnFromArrowColumn(arrow_nested_column, column_name, format_name, false, dictionary_infos, allow_null_type, skip_columns_with_unsupported_types, skipped, date_time_overflow_behavior, nested_type_hint, true);
if (skipped)
return {};
- auto offsets_column = readOffsetsFromArrowListColumn(arrow_column);
+ auto offsets_column = readOffsetsFromArrowListColumn<arrow::ListArray>(arrow_column);
const auto * tuple_column = assert_cast<const ColumnTuple *>(nested_column.column.get());
const auto * tuple_type = assert_cast<const DataTypeTuple *>(nested_column.type.get());
@@ -846,7 +863,9 @@ static ColumnWithTypeAndName readColumnFromArrowColumn(
return {std::move(map_column), std::move(map_type), column_name};
}
case arrow::Type::LIST:
+ case arrow::Type::LARGE_LIST:
{
+ bool is_large = arrow_column->type()->id() == arrow::Type::LARGE_LIST;
DataTypePtr nested_type_hint;
if (type_hint)
{
@@ -854,11 +873,11 @@ static ColumnWithTypeAndName readColumnFromArrowColumn(
if (array_type_hint)
nested_type_hint = array_type_hint->getNestedType();
}
- auto arrow_nested_column = getNestedArrowColumn(arrow_column);
+ auto arrow_nested_column = is_large ? getNestedArrowColumn<arrow::LargeListArray>(arrow_column) : getNestedArrowColumn<arrow::ListArray>(arrow_column);
auto nested_column = readColumnFromArrowColumn(arrow_nested_column, column_name, format_name, false, dictionary_infos, allow_null_type, skip_columns_with_unsupported_types, skipped, date_time_overflow_behavior, nested_type_hint);
if (skipped)
return {};
- auto offsets_column = readOffsetsFromArrowListColumn(arrow_column);
+ auto offsets_column = is_large ? readOffsetsFromArrowListColumn<arrow::LargeListArray>(arrow_column) : readOffsetsFromArrowListColumn<arrow::ListArray>(arrow_column);
auto array_column = ColumnArray::create(nested_column.column, offsets_column);
auto array_type = std::make_shared<DataTypeArray>(nested_column.type);
return {std::move(array_column), std::move(array_type), column_name};
--
2.42.0
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