HyperSQLのテーブルとUUIDの配列の列がある場合、INSERT
PreparedStatement
を作成してそのようなフィールドを作成する適切な方法は何ですか?JDBCのPreparedStatementを使用してUUIDの配列をHyperSQLデータベースに挿入する方法
SSCCE:
public class Example{
public static void main(String[] args) throws Exception{
// Create UUID array
UUID[] exmapleArray = new UUID[5];
for(int i = 0; i < exmapleArray.length; i++){
exmapleArray[i] = UUID.randomUUID();
}
// Load database class
Class.forName("org.hsqldb.jdbc.JDBCDriver");
// Connect to database
try(Connection databaseConnection = DriverManager.getConnection("jdbc:hsqldb:mem:foo")){
try(Statement createStatement = databaseConnection.createStatement()){
createStatement.executeUpdate("CREATE TABLE bar(test_field UUID ARRAY[10])");
}
try(PreparedStatement preparedStatement = databaseConnection.prepareStatement("INSERT INTO bar VALUES (?)")){
// None of the below examples work
// preparedStatement.setArray(1, databaseConnection.createArrayOf("UUID", exmapleArray));
// preparedStatement.setArray(1, databaseConnection.createArrayOf("VARCHAR", exmapleArray));
// preparedStatement.setArray(1, databaseConnection.createArrayOf("UUID", Arrays.stream(exmapleArray).map(UUID::toString).toArray()));
// preparedStatement.setArray(1, databaseConnection.createArrayOf("VARCHAR", Arrays.stream(exmapleArray).map(UUID::toString).toArray()));
// preparedStatement.setArray(1, new JDBCArrayBasic(exmapleArray, Type.BINARY_UUID));
// preparedStatement.setArray(1, new JDBCArrayBasic(Arrays.stream(exmapleArray).map(UUID::toString).toArray(), Type.BINARY_UUID));
preparedStatement.executeUpdate();
}
}
}
}
平野UUID
は、配列を移入PreparedStatement.setString()
で行うことができます移入しながら、しかし、最も一般的なもの、上記の文の選択に応じて、いくつかの異なる例外を得、動作するようには思えません。コメントアウトされた試みの
Exception in thread "main" java.sql.SQLSyntaxErrorException: incompatible data type in conversion
at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source)
at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source)
at org.hsqldb.jdbc.JDBCConnection.createArrayOf(Unknown Source)
at Example.main(Example.java:31)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
Caused by: org.hsqldb.HsqlException: incompatible data type in conversion
at org.hsqldb.error.Error.error(Unknown Source)
at org.hsqldb.error.Error.error(Unknown Source)
at org.hsqldb.types.CharacterType.convertToDefaultType(Unknown Source)
at org.hsqldb.types.CharacterType.convertJavaToSQL(Unknown Source)
... 7 more
後者の二つは、同様incompatible data type in conversion
をもたらす(具体的JDBCArrayBasic
)HSQLDB固有のクラスを使用します。