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new e8870d1 ARROW-2166: [GLib] Add Slice api to Column
e8870d1 is described below
commit e8870d1cfae9ecd62c69e7b9f57da0bdfb3a8dc2
Author: yosuke shiro <[email protected]>
AuthorDate: Fri Feb 16 14:31:29 2018 -0500
ARROW-2166: [GLib] Add Slice api to Column
Add Slice api to Column.
Author: yosuke shiro <[email protected]>
Closes #1617 from shiro615/ARROW-2166 and squashes the following commits:
bd39d756 [yosuke shiro] ARROW-2166: [GLib] Add Slice api to Column
---
c_glib/arrow-glib/column.cpp | 20 ++++++++++++++++++++
c_glib/arrow-glib/column.h | 3 +++
c_glib/test/test-column.rb | 16 ++++++++++++++++
3 files changed, 39 insertions(+)
diff --git a/c_glib/arrow-glib/column.cpp b/c_glib/arrow-glib/column.cpp
index a7222b1..55d06ea 100644
--- a/c_glib/arrow-glib/column.cpp
+++ b/c_glib/arrow-glib/column.cpp
@@ -161,6 +161,26 @@ garrow_column_new_chunked_array(GArrowField *field,
}
/**
+ * garrow_column_slice:
+ * @column: A #GArrowColumn.
+ * @offset: The offset of sub #GArrowColumn.
+ * @length: The length of sub #GArrowColumn.
+ *
+ * Returns: (transfer full): The sub #GArrowColumn. It covers only from
+ * `offset` to `offset + length` range. The sub #GArrowColumn shares
+ * values with the base #GArrowColumn.
+ */
+GArrowColumn *
+garrow_column_slice(GArrowColumn *column,
+ guint64 offset,
+ guint64 length)
+{
+ const auto arrow_column = garrow_column_get_raw(column);
+ auto arrow_sub_column = arrow_column->Slice(offset, length);
+ return garrow_column_new_raw(&arrow_sub_column);
+}
+
+/**
* garrow_column_equal:
* @column: A #GArrowColumn.
* @other_column: A #GArrowColumn to be compared.
diff --git a/c_glib/arrow-glib/column.h b/c_glib/arrow-glib/column.h
index b649c5f..f2c181d 100644
--- a/c_glib/arrow-glib/column.h
+++ b/c_glib/arrow-glib/column.h
@@ -71,6 +71,9 @@ GArrowColumn *garrow_column_new_array(GArrowField *field,
GArrowArray *array);
GArrowColumn *garrow_column_new_chunked_array(GArrowField *field,
GArrowChunkedArray
*chunked_array);
+GArrowColumn *garrow_column_slice(GArrowColumn *column,
+ guint64 offset,
+ guint64 length);
gboolean garrow_column_equal (GArrowColumn *column,
GArrowColumn *other_column);
diff --git a/c_glib/test/test-column.rb b/c_glib/test/test-column.rb
index 96e02b6..01127de 100644
--- a/c_glib/test/test-column.rb
+++ b/c_glib/test/test-column.rb
@@ -96,4 +96,20 @@ class TestColumn < Test::Unit::TestCase
column = Arrow::Column.new(field, chunked_array)
assert_equal(3, column.data.length)
end
+
+ def test_slice
+ field = Arrow::Field.new("enabled", Arrow::BooleanDataType.new)
+ chunks1 = [
+ build_boolean_array([true, false, true]),
+ build_boolean_array([false, true]),
+ ]
+ chunks2 = [
+ build_boolean_array([false, true]),
+ build_boolean_array([false]),
+ ]
+ chunked_array = Arrow::ChunkedArray.new(chunks1)
+ column = Arrow::Column.new(field, chunked_array)
+ sub_column = column.slice(1, 3)
+ assert_equal(chunks2, sub_column.data.chunks)
+ end
end
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