我试图做一个ResultSet的更新,我得到一个例外,No primary key found for table nvp,
有一个主键的表。PostgreSQL错误更新ResultSet“找不到表的主键”表w /键
它是PostgreSQL 9.6.1.0,jdbc驱动程序版本是从他们的网站(JDBC42 Postgresql驱动程序,版本9.4.1212从here)下载的postgresql-9.4.1212.jar。
@Test
public void testUpdateableResultSet() throws Exception {
String url = "jdbc:postgresql://localhost:5432/dot";
Properties props = new Properties();
props.setProperty("user", "dot_test");
props.setProperty("password", "test_dot");
props.setProperty("currentSchema", "dot_test");
try(Connection conn = DriverManager.getConnection(url, props)) {
conn.setAutoCommit(false);
try(Statement s = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE)) {
s.execute("drop table if exists nvp");
s.execute("create table nvp (id int primary key, value text);");
s.execute("insert into nvp (id, value) values (1, 'one_'), (2, 'two_')");
}
try(PreparedStatement ps = conn.prepareStatement("select value from nvp",
ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
ResultSet rs = ps.executeQuery()) {
while(rs.next()) {
String s = rs.getString(1);
if(s.endsWith("_")) {
s = s.replace("_", "");
}
else {
s = s + "_";
}
rs.updateString(1, s); // line 28
System.out.println("row updated");
}
}
}
}
具有以下结果。
Testcase: testUpdateableResultSet(com.tekbot.lib.sql.SimpleTest): Caused an ERROR
No primary key found for table nvp.
org.postgresql.util.PSQLException: No primary key found for table nvp.
at org.postgresql.jdbc.PgResultSet.isUpdateable(PgResultSet.java:1586)
at org.postgresql.jdbc.PgResultSet.checkUpdateable(PgResultSet.java:2722)
at org.postgresql.jdbc.PgResultSet.updateValue(PgResultSet.java:3056)
at org.postgresql.jdbc.PgResultSet.updateString(PgResultSet.java:1393)
at com.tekbot.lib.sql.SimpleTest.testUpdateableResultSet(SimpleTest.java:28)
这是一个错误?我错过了一步吗?
这行是第28? –
@ScaryWombat'rs.updateString(1,s);' – Thrasher
这是否发生在'while'的第一次迭代?你是否错过了'updateRow()'? –