[GLib] Add GArrowDecimal32DataType

[kou]

Describe the enhancement requested

It's for arrow::type::Decimal32Type.

See also the GArrowDecimal128DataType implementation:

arrow/c_glib/arrow-glib/basic-data-type.h

Lines 611 to 630 in 8a7224d

	#define GARROW_TYPE_DECIMAL128_DATA_TYPE (garrow_decimal128_data_type_get_type())
	GARROW_AVAILABLE_IN_ALL
	G_DECLARE_DERIVABLE_TYPE(GArrowDecimal128DataType,
	garrow_decimal128_data_type,
	GARROW,
	DECIMAL128_DATA_TYPE,
	GArrowDecimalDataType)
	struct _GArrowDecimal128DataTypeClass
	{
	GArrowDecimalDataTypeClass parent_class;
	};
	GARROW_AVAILABLE_IN_3_0
	gint32
	garrow_decimal128_data_type_max_precision();
	GARROW_AVAILABLE_IN_0_12
	GArrowDecimal128DataType *
	garrow_decimal128_data_type_new(gint32 precision, gint32 scale, GError **error);

arrow/c_glib/arrow-glib/basic-data-type.cpp

Line 117 in 8a7224d

* #GArrowDecimal128DataType is a class for the 128-bit decimal data type.

arrow/c_glib/arrow-glib/basic-data-type.cpp

Lines 1548 to 1599 in 8a7224d

	G_DEFINE_TYPE(GArrowDecimal128DataType,
	garrow_decimal128_data_type,
	GARROW_TYPE_DECIMAL_DATA_TYPE)
	static void
	garrow_decimal128_data_type_init(GArrowDecimal128DataType *object)
	{
	}
	static void
	garrow_decimal128_data_type_class_init(GArrowDecimal128DataTypeClass *klass)
	{
	}
	/**
	* garrow_decimal128_data_type_max_precision:
	*
	* Returns: The max precision of 128-bit decimal data type.
	*
	* Since: 3.0.0
	*/
	gint32
	garrow_decimal128_data_type_max_precision()
	{
	return arrow::Decimal128Type::kMaxPrecision;
	}
	/**
	* garrow_decimal128_data_type_new:
	* @precision: The precision of decimal data.
	* @scale: The scale of decimal data.
	* @error: (nullable): Return location for a #GError or %NULL.
	*
	* Returns: (nullable):
	* The newly created 128-bit decimal data type on success, %NULL on error.
	*
	* Since: 0.12.0
	*/
	GArrowDecimal128DataType *
	garrow_decimal128_data_type_new(gint32 precision, gint32 scale, GError **error)
	{
	auto arrow_data_type_result = arrow::Decimal128Type::Make(precision, scale);
	if (garrow::check(error, arrow_data_type_result, "[decimal128-data-type][new]")) {
	auto arrow_data_type = *arrow_data_type_result;
	return GARROW_DECIMAL128_DATA_TYPE(g_object_new(GARROW_TYPE_DECIMAL128_DATA_TYPE,
	"data-type",
	&arrow_data_type,
	NULL));
	} else {
	return NULL;
	}
	}

https://github.com/apache/arrow/blob/main/c_glib/test/test-decimal128-data-type.rb

Component(s)

GLib

[kou]

Issue resolved by pull request 44580
#44580

[kou]

@hiroyuki-sato Could you add "take" only comment here to assign you to this issue?

[hiroyuki-sato]

take