この例では、テーブル全体をDATASETデータ型に作成する方法を示します。
CREATE TABLE employeeTable( empID INTEGER, empName VARCHAR(100), empDept VARCHAR(100)); INSERT INTO employeeTable(1,'George Smith','Accounting'); INSERT INTO employeeTable(2,'Pauline Kramer','HR'); INSERT INTO employeeTable(3,'Steven Mazzo','Engineering'); SELECT * FROM DATASET_PUBLISH ( ON (SELECT empName, empDept FROM employeeTable) ) AS avroFiles; data 7B2274797065223A226172726179222C226974656D73223A7B2274797065223A227265636F7264222C226E616D65223A227265635F30222C226669656C6473223A5B7B226E616D65223A22656D704E616D65222C2274797065223A22737472696E67227D2C7B226E616D65223A22656D7044657074222C2274797065223A22737472696E67227D5D7D7D0006001847656F72676520536D697468144163636F756E74696E67021C5061756C696E65204B72616D6572044852041853746576656E204D617A7A6F16456E67696E656572696E6700
格納形式CSVを指定してテーブル全体をDATASETデータ型で作成するには、次のようにします。
CREATE TABLE employeeTable( empID INTEGER, empName VARCHAR(100), empDept VARCHAR(100)); INSERT INTO employeeTable(1,'George Smith','Accounting'); INSERT INTO employeeTable(2,'Pauline Kramer','HR'); INSERT INTO employeeTable(3,'Steven Mazzo','Engineering'); SELECT * FROM DATASET_PUBLISH ( ON (SELECT empName, empDept FROM employeeTable) RETURNS (data DATASET STORAGE FORMAT CSV) ) AS csvFiles;
fileSchema | fileData |
---|---|
NULL | empName,empDept George Smith,Accounting Pauline Kramer,HR Steven Mazzo,Engineering |
出力をJSONに変換するため、'SELECT *'の代わりに'SELECT data.toJSON()'を使用して次の例を実行します。