TableToArrowTable

サマリー

Converts a table or feature class to an Apache Arrow table.

説明

Apache Arrow is a standard cross-platform in-memory representation of columnar data used to efficiently transport data between analytics systems for big data. For more information, see Apache Arrow in ArcGIS.

構文

TableToArrowTable (in_table, {field_names}, {where_clause}, {geometry_encoding})

パラメーター	説明	データ タイプ
in_table	The feature class, layer, table, or table view.	String
field_names [field_names,...]	A list (or tuple) of field names. For a single field, you can use a string instead of a list of strings. (デフォルト値は次のとおりです "")	String
where_clause	An optional expression that limits the records returned. For more information on WHERE clauses and SQL statements, see SQL reference for query expressions used in ArcGIS. (デフォルト値は次のとおりです "")	String
geometry_encoding	Specifies the geometry encoding of the geometry column in the resulting Arrow table. ESRISHAPE—Native binary geometry encoding ESRIJSON—Native JSON format geometry encoding GEOJSON—Open standard JSON format geometry encoding. WKT—Well-known text (WKT) geometry encoding. WKB—Well-known binary (WKB) geometry encoding 注意: If no geometry field is specified in the field_names argument or the in_table value is a non-spatial table, this argument will be ignored. In both cases, the resulting Arrow table will not contain a geometry column. (デフォルト値は次のとおりです ESRISHAPE)	String

戻り値

データ タイプ	説明
PyArrowTable	The output pyarrow.Table. See the pyarrow.Table object API.

コードのサンプル

TableToArrowTable example 1

Convert a feature class to an Arrow table and count the number of counties in the dataset.

import arcpy

input = r'C:\data\usa.gdb\USA\counties'
arrow_table = arcpy.da.TableToArrowTable(input)

# Get the number of counties in the dataset
count = arcpy.management.GetCount(arrow_table)
print(f"Number of US Counties: {count}")

TableToArrowTable example 2

Convert a feature class to an Arrow table with the WKT geometry encoding.

import arcpy

input = r'C:\data\usa.gdb\USA\counties'
arrow_table = arcpy.da.TableToArrowTable(input, geometry_encoding="WKT")