例: 集約されない結果を返す - Teradata Database - Teradata Vantage NewSQL Engine - DATASET公開機能のための例。

Teradata Vantage™ DATASETデータ型

Product
Teradata Database
Teradata Vantage NewSQL Engine
Release Number
16.20
Published
2019年3月
Language
日本語
Last Update
2019-10-29
dita:mapPath
ja-JP/pgs1512082344257.ditamap
dita:ditavalPath
ja-JP/pgs1512082344257.ditaval
dita:id
B035-1198
Product Category
Software
Teradata Vantage

次のAVROの例では、結果は集約されません。例えば、1つのテーブルの各行は1つのDATASETデータ型のインスタンスになります。

SELECT * FROM DATASET_PUBLISH
(
	ON (SELECT * FROM employeeTable) 
	RETURNS (data DATASET STORAGE FORMAT AVRO)
	USING DO_AGGREGATE('N')
) AS avroFiles;

data
7B226E616D65223A22656D706C6F7965655461626C65222C2274797065223A227265636F7264222C226669656C6473223A5B7B226E616D65223A22656D704944222C2274797065223A22696E74227D2C7B226E616D65223A22656D704E616D65222C2274797065223A22737472696E67227D2C7B226E616D65223A22656D7044657074222C2274797065223A22737472696E67227D5D7D00021847656F72676520536D697468144163636F756E74696E67

7B226E616D65223A22656D706C6F7965655461626C65222C2274797065223A227265636F7264222C226669656C6473223A5B7B226E616D65223A22656D704944222C2274797065223A22696E74227D2C7B226E616D65223A22656D704E616D65222C2274797065223A22737472696E67227D2C7B226E616D65223A22656D7044657074222C2274797065223A22737472696E67227D5D7D00041C5061756C696E65204B72616D6572044852

7B226E616D65223A22656D706C6F7965655461626C65222C2274797065223A227265636F7264222C226669656C6473223A5B7B226E616D65223A22656D704944222C2274797065223A22696E74227D2C7B226E616D65223A22656D704E616D65222C2274797065223A22737472696E67227D2C7B226E616D65223A22656D7044657074222C2274797065223A22737472696E67227D5D7D00061853746576656E204D617A7A6F16456E67696E656572696E67

結果は、CSVの例では集約されません。

SELECT * FROM DATASET_PUBLISH
(
	ON (SELECT * FROM employeeTable) 
	RETURNS (data DATASET STORAGE FORMAT CSV)
	USING DO_AGGREGATE('N')
) AS csvFiles;
fileSchema fileData
NULL empId,empname,empDept

1,George Smith,Accounting

NULL empId,empname,empDept

2,Pauline Kramer,HR

NULL empId,empname,empDept

3,Steven Mazzo,Engineering