通过 JBDC 获取在 IBM DB2 V6R1 (AS400) 上插入的行数
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【中文标题】通过 JBDC 获取在 IBM DB2 V6R1 (AS400) 上插入的行数【英文标题】：Getting number of rows inserted on IBM DB2 V6R1 (AS400) through JBDC 【发布时间】：2011-08-13 18:24:51 【问题描述】：我们最近迁移到 AS400 上更新的 V6R1 版本的 DB2，我们使用 Spring 框架（v. 2.5.6.）与数据库通信。我们正在调用 Spring 的 NamedParameterJdbcTemplate.update() 方法来插入新行，这个方法应该返回插入的行数，尽管正在定期插入行，但没有发生什么（结果我们得到了零）。
我们得出的结论是，如果insert语句中没有主键列一切正常，所以PK列自增时没有问题，但在某些情况下我们必须插入PK值，然后我们必须以某种方式应对定期发生的情况插入的行未使用 JDBC 或 Spring 注册。
有人可以帮忙吗？
【问题讨论】：
我假设您正在使用 jt400.jar（即 iSeries 的 JTOpen）来访问数据库？ 是的，可以从 sourceforge 下载的最新版本：7.3 我们为 JDBC 开启了调试，得到的 SQL 与版本 5 中有些不同，它包含了著名的新特性：Prepared STMT0001*, SQL Statement -->[SELECT *SQLGENCOLUMNS FROM FINAL TABLE (插入 test_v6r1 (id, value) 值 (?, ?))]. 你能根据调用堆栈判断它在调用什么吗？是调用 AS400JDBCStatement.executeUpdate 吗？如果它只调用只返回布尔值的 execute()。也许尝试看看您是否也可以在 AS400JDBCStatement 上调用 getUpdateCount()。 嘿，这个你在哪里？ 【参考方案1】：更新：此issue 已在JTOpen 7.6 中修复
我和 Ante 一起工作......这个问题与 Spring 无关，这是肯定的，因为我已经设置了一个使用普通 JDBC 和 PreparedStatements 的项目。
所以我将添加更多关于如何模拟问题的信息：
DDL：
CREATE TABLE TEST_V6R1 (
ID INTEGER NOT NULL DEFAULT,
VALUE VARCHAR(50)
);
ALTER TABLE TEST_V6R1 ADD CONSTRAINT TEST_V6R1_PK PRIMARY KEY
(ID);
SQL：
insert into test_v6r1 (id, value ) values (?, ?)
Java 代码：
public class TestV6R1
public static void main( String[] args )
Connection conn = null;
PreparedStatement ps1 = null;
PreparedStatement ps2 = null;
try
conn = getNewConnection();
conn.setAutoCommit( false );
String value = "Test: " + new Timestamp( System.currentTimeMillis() );
// First statement which uses RETURN_GENERATED_KEYS
ps1 = conn.prepareStatement( "insert into test_v6r1 (id, value ) values (?, ?)", Statement.RETURN_GENERATED_KEYS );
ps1.setInt( 1, 1 );
ps1.setString( 2, value );
int ps1Rows = ps1.executeUpdate();
// in case of V5R4
// ps1Rows is 1
// in case of V6R1
// ps1Rows is 0
ResultSet ps1keys = ps1.getGeneratedKeys();
int ps1KeySize = 0;
if (ps1keys != null)
ps1keys.last();
ps1KeySize = ps1keys.getRow();
System.out.println("PS1 - SQL insert affected " + ps1Rows + " rows and returned " + ps1KeySize + " keys");
System.out.println("PS1 - getUpdateCount()="+ ps1.getUpdateCount());
// Second statement which uses NO_GENERATED_KEYS
ps2 = conn.prepareStatement( "insert into test_v6r1 (id, value) values (?, ?)", Statement.NO_GENERATED_KEYS );
ps2.setInt( 1, 2 );
ps2.setString( 2, value );
int ps2Rows = ps2.executeUpdate();
// in case of V5R4
// ps2Rows is 1
// in case of V6R1
// ps2Rows is 1
ResultSet ps2Keys = ps2.getGeneratedKeys();
int ps2KeySize = 0;
if (ps2Keys != null)
ps2Keys.last();
ps2KeySize = ps2Keys.getRow();
System.out.println("PS2 - SQL insert affected " + ps2Rows + " rows and returned " + ps2KeySize + " keys");
System.out.println("PS2 - getUpdateCount()="+ ps2.getUpdateCount());
conn.commit();
catch ( Throwable e )
e.printStackTrace();
try
conn.rollback();
catch ( SQLException e1 )
e1.printStackTrace();
finally
try
if (ps1!=null) ps1.close();
if (ps2!=null) ps2.close();
if (conn!=null) conn.close();
catch ( SQLException e )
e.printStackTrace();
public static Connection getNewConnection()
try
Class.forName( "com.ibm.as400.access.AS400JDBCDriver" ); // Or any other driver
catch ( Exception x )
System.out.println( "Unable to load the driver class!" );
Connection dbConnection = null;
try
// TEST - V6R1
dbConnection = DriverManager
.getConnection( "jdbc:as400://testServer;libraries=*libl;naming=system;sort=language;sort language=HRV;sort weight=shared;prompt=false;trace=true",
"username",
"password" );
// PRODUCTION - V5R4
// dbConnection = DriverManager
// .getConnection( "jdbc:as400://productionServer;libraries=*libl;naming=system;sort=language;sort language=HRV;sort weight=shared;prompt=false;trace=true",
// "username",
// "password" );
catch ( SQLException x )
System.out.println( "Couldn’t get connection!" );
return dbConnection;
V5R4 控制台输出：
Toolbox for Java - Open Source Software, JTOpen 7.3, codebase 5770-SS1 V7R1M0.03 2011/01/14 @B5
as400: Properties (12122347) : access = "all".
as400: Properties (12122347) : block size = "32".
as400: Properties (12122347) : block criteria = "2".
as400: Properties (12122347) : date format = "".
as400: Properties (12122347) : date separator = "".
as400: Properties (12122347) : decimal separator = "".
as400: Properties (12122347) : errors = "basic".
as400: Properties (12122347) : extended dynamic = "false".
as400: Properties (12122347) : libraries = "*libl".
as400: Properties (12122347) : naming = "system".
as400: Properties (12122347) : package = "".
as400: Properties (12122347) : package add = "true".
as400: Properties (12122347) : package cache = "false".
as400: Properties (12122347) : package clear = "false".
as400: Properties (12122347) : package error = "warning".
as400: Properties (12122347) : package library = "".
as400: Properties (12122347) : password = "".
as400: Properties (12122347) : prefetch = "true".
as400: Properties (12122347) : prompt = "false".
as400: Properties (12122347) : remarks = "system".
as400: Properties (12122347) : sort = "language".
as400: Properties (12122347) : sort language = "HRV".
as400: Properties (12122347) : sort table = "".
as400: Properties (12122347) : sort weight = "shared".
as400: Properties (12122347) : time format = "".
as400: Properties (12122347) : time separator = "".
as400: Properties (12122347) : trace = "true".
as400: Properties (12122347) : transaction isolation = "read uncommitted".
as400: Properties (12122347) : translate binary = "false".
as400: Properties (12122347) : user = "username".
as400: Properties (12122347) : package criteria = "default".
as400: Properties (12122347) : lob threshold = "32768".
as400: Properties (12122347) : secure = "false".
as400: Properties (12122347) : data truncation = "true".
as400: Properties (12122347) : proxy server = "".
as400: Properties (12122347) : secondary URL = "".
as400: Properties (12122347) : data compression = "true".
as400: Properties (12122347) : big decimal = "true".
as400: Properties (12122347) : thread used = "true".
as400: Properties (12122347) : cursor hold = "true".
as400: Properties (12122347) : lazy close = "false".
as400: Properties (12122347) : driver = "toolbox".
as400: Properties (12122347) : bidi string type = "5".
as400: Properties (12122347) : key ring name = "".
as400: Properties (12122347) : key ring password = "".
as400: Properties (12122347) : full open = "false".
as400: Properties (12122347) : server trace = "0".
as400: Properties (12122347) : database name = "".
as400: Properties (12122347) : extended metadata = "false".
as400: Properties (12122347) : cursor sensitivity = "asensitive".
as400: Properties (12122347) : behavior override = "0".
as400: Properties (12122347) : package ccsid = "13488".
as400: Properties (12122347) : minimum divide scale = "0".
as400: Properties (12122347) : maximum precision = "31".
as400: Properties (12122347) : maximum scale = "31".
as400: Properties (12122347) : translate hex = "character".
as400: Properties (12122347) : toolbox trace = "".
as400: Properties (12122347) : qaqqinilib = "".
as400: Properties (12122347) : login timeout = "".
as400: Properties (12122347) : true autocommit = "false".
as400: Properties (12122347) : bidi implicit reordering = "true".
as400: Properties (12122347) : bidi numeric ordering = "false".
as400: Properties (12122347) : hold input locators = "true".
as400: Properties (12122347) : hold statements = "false".
as400: Properties (12122347) : rollback cursor hold = "false".
as400: Properties (12122347) : variable field compression = "true".
as400: Properties (12122347) : query optimize goal = "0".
as400: Properties (12122347) : keep alive = "".
as400: Properties (12122347) : receive buffer size = "".
as400: Properties (12122347) : send buffer size = "".
as400: Properties (12122347) : XA loosely coupled support = "0".
as400: Properties (12122347) : translate boolean = "true".
as400: Properties (12122347) : metadata source = "-1".
as400: Properties (12122347) : query storage limit = "-1".
as400: Properties (12122347) : decfloat rounding mode = "half even".
as400: Properties (12122347) : autocommit exception = "false".
as400: Properties (12122347) : auto commit = "true".
as400: Properties (12122347) : ignore warnings = "".
as400: Properties (12122347) : secure current user = "true".
as400: Properties (12122347) : concurrent access resolution = "0".
as400: Properties (12122347) : jvm16 synchronize = "true".
as400: Properties (12122347) : socket timeout = "".
as400: Properties (12122347) : use block update = "false".
as400: Properties (12122347) : maximum blocked input rows = "32000".
as400: Driver AS/400 Toolbox for Java JDBC Driver (15779934) : Using IBM Toolbox for Java JDBC driver implementation.
as400: Properties (12122347) : metadata source = "0".
as400: Toolbox for Java - Open Source Software, JTOpen 7.3, codebase 5770-SS1 V7R1M0.03 2011/01/14 @B5
as400: JDBC Level: 40
as400: Properties (12122347) : package ccsid = "13488".
as400: Connection productionServer (367156) : Client CCSID = 13488.
as400: Connection productionServer (367156) : Setting server NLV = 2912.
as400: Connection productionServer (367156) : Client functional level = V7R1M01 .
as400: Connection productionServer (367156) : Data compression = RLE.
as400: Connection productionServer (367156) : ROWID supported = true.
as400: Connection productionServer (367156) : True auto-commit supported = true.
as400: Connection productionServer (367156) : 128 byte column names supported = true.
as400: Connection productionServer (367156) : Maximum decimal precision = 31.
as400: Connection productionServer (367156) : Maximum decimal scale = 31.
as400: Connection productionServer (367156) : Minimum divide scale = 0.
as400: Connection productionServer (367156) : Translate hex = character.
as400: Connection productionServer (367156) : query optimize goal = 0.
as400: Connection productionServer (367156) : Using extended datastreams.
as400: Connection productionServer (367156) : JDBC driver major version = 9.
as400: Connection productionServer (367156) : IBM i VRM = V5R4M0.
as400: Connection productionServer (367156) : Server CCSID = 870.
as400: Connection productionServer (367156) : Server functional level = V5R4M00014 (14).
as400: Connection productionServer (367156) : Server job identifier = 692621/QUSER/QZDASOINIT.
as400: Properties (12122347) : decimal separator = ".".
as400: Properties (12122347) : date format = "dmy".
as400: Properties (12122347) : date separator = "/".
as400: Properties (12122347) : time format = "hms".
as400: Properties (12122347) : time separator = ":".
as400: Connection productionServer (367156) open.
as400: Connection productionServer (367156) : Auto commit = "true".
as400: Connection productionServer (367156) : Read only = "false".
as400: Connection productionServer (367156) : Transaction isolation = "1".
as400: Connection productionServer (367156) : Auto commit = "false".
as400: PreparedStatement STMT0001 (24864323) open. Parent: Connection productionServer (367156) .
as400: PreparedStatement STMT0001 (24864323) : Escape processing = "true".
as400: PreparedStatement STMT0001 (24864323) : Fetch direction = "1000".
as400: PreparedStatement STMT0001 (24864323) : Fetch size = "0".
as400: PreparedStatement STMT0001 (24864323) : Max field size = "0".
as400: PreparedStatement STMT0001 (24864323) : Max rows = "0".
as400: PreparedStatement STMT0001 (24864323) : Query timeout = "0".
as400: PreparedStatement STMT0001 (24864323) : Result set concurrency = "1007".
as400: PreparedStatement STMT0001 (24864323) : Result set holdability = "1".
as400: PreparedStatement STMT0001 (24864323) : Result set type = "1003".
as400: PreparedStatement STMT0001 (24864323) : Behavior Override = "0".
as400: PreparedStatement STMT0001 (24864323) : Data to correlate statement with cursor Cursor CRSR0001 (7792807) .
as400: PreparedStatement STMT0001 (24864323) : Preparing [insert into test_v6r1 (id, value ) values (?, ?)].
as400: PreparedStatement STMT0001 (24864323) : Prepared STMT0001*, SQL Statement -->[insert into test_v6r1 (id, value ) values (?, ?)].
as400: PreparedStatement STMT0001 (24864323) : setInt().
as400: PreparedStatement STMT0001 (24864323) : parameter index: 1 value: 1.
as400: PreparedStatement STMT0001 (24864323) : setString().
as400: PreparedStatement STMT0001 (24864323) : parameter index: 2 value: Test: 2011-04-27 16:34:30.981.
as400: PreparedStatement STMT0001 (24864323) : Descriptor 1 created or changed.
as400: PreparedStatement STMT0001 (24864323) : returnCode is: 0.
as400: PreparedStatement STMT0001 (24864323) : generated key from system is: null.
as400: ResultSet (2850225) open.
as400: ResultSet (2850225) : Conncurrency = "1007".
as400: ResultSet (2850225) : Fetch direction = "1000".
as400: ResultSet (2850225) : Fetch size = "0".
as400: ResultSet (2850225) : Max rows = "0".
as400: ResultSet (2850225) : Type = "1004".
as400: PreparedStatement STMT0001 (24864323) : Executed STMT0001*, SQL Statement --> [insert into test_v6r1 (id, value ) values (?, ?)].
as400: PreparedStatement STMT0001 (24864323) : Update count = 1.
as400: PreparedStatement STMT0001 (24864323) : Result set = false.
as400: PreparedStatement STMT0001 (24864323) : Number of result sets = 0.
as400: PreparedStatement STMT0001 (24864323) : Row count estimate = -1.
PS1 - SQL insert affected 1 rows and returned 0 keys
PS1 - getUpdateCount()=1
as400: PreparedStatement STMT0002 (19098837) open. Parent: Connection productionServer (367156) .
as400: PreparedStatement STMT0002 (19098837) : Escape processing = "true".
as400: PreparedStatement STMT0002 (19098837) : Fetch direction = "1000".
as400: PreparedStatement STMT0002 (19098837) : Fetch size = "0".
as400: PreparedStatement STMT0002 (19098837) : Max field size = "0".
as400: PreparedStatement STMT0002 (19098837) : Max rows = "0".
as400: PreparedStatement STMT0002 (19098837) : Query timeout = "0".
as400: PreparedStatement STMT0002 (19098837) : Result set concurrency = "1007".
as400: PreparedStatement STMT0002 (19098837) : Result set holdability = "1".
as400: PreparedStatement STMT0002 (19098837) : Result set type = "1003".
as400: PreparedStatement STMT0002 (19098837) : Behavior Override = "0".
as400: PreparedStatement STMT0002 (19098837) : Data to correlate statement with cursor Cursor CRSR0002 (12470752) .
as400: PreparedStatement STMT0002 (19098837) : Preparing [insert into test_v6r1 (id, value) values (?, ?)].
as400: PreparedStatement STMT0002 (19098837) : Prepared STMT0002*, SQL Statement -->[insert into test_v6r1 (id, value) values (?, ?)].
as400: PreparedStatement STMT0002 (19098837) : setInt().
as400: PreparedStatement STMT0002 (19098837) : parameter index: 1 value: 2.
as400: PreparedStatement STMT0002 (19098837) : setString().
as400: PreparedStatement STMT0002 (19098837) : parameter index: 2 value: Test: 2011-04-27 16:34:30.981.
as400: PreparedStatement STMT0002 (19098837) : Descriptor 2 created or changed.
as400: PreparedStatement STMT0002 (19098837) : Executed STMT0002*, SQL Statement --> [insert into test_v6r1 (id, value) values (?, ?)].
as400: PreparedStatement STMT0002 (19098837) : Update count = 1.
as400: PreparedStatement STMT0002 (19098837) : Result set = false.
as400: PreparedStatement STMT0002 (19098837) : Number of result sets = 0.
as400: PreparedStatement STMT0002 (19098837) : Row count estimate = -1.
PS2 - SQL insert affected 1 rows and returned 0 keys
PS2 - getUpdateCount()=1
as400: Connection productionServer (367156) : Testing to see if cursors should be held..
as400: Connection productionServer (367156) : Transaction commit.
as400: ResultSet (2850225) closed.
as400: PreparedStatement STMT0001 (24864323) closed.
as400: PreparedStatement STMT0002 (19098837) closed.
as400: Connection productionServer (367156) closed.
V6R1 控制台输出：
Toolbox for Java - Open Source Software, JTOpen 7.3, codebase 5770-SS1 V7R1M0.03 2011/01/14 @B5
.
.
.
as400: Driver AS/400 Toolbox for Java JDBC Driver (27979955) : Using IBM Toolbox for Java JDBC driver implementation.
as400: Properties (16020374) : metadata source = "0".
as400: Toolbox for Java - Open Source Software, JTOpen 7.3, codebase 5770-SS1 V7R1M0.03 2011/01/14 @B5
as400: JDBC Level: 40
as400: Properties (16020374) : package ccsid = "13488".
as400: Connection testServer (11463270) : Client CCSID = 13488.
as400: Connection testServer (11463270) : Setting server NLV = 2912.
as400: Connection testServer (11463270) : Client functional level = V7R1M01 .
as400: Connection testServer (11463270) : Data compression = RLE.
as400: Connection testServer (11463270) : ROWID supported = true.
as400: Connection testServer (11463270) : True auto-commit supported = true.
as400: Connection testServer (11463270) : 128 byte column names supported = true.
as400: Connection testServer (11463270) : Maximum decimal precision = 31.
as400: Connection testServer (11463270) : Maximum decimal scale = 31.
as400: Connection testServer (11463270) : Minimum divide scale = 0.
as400: Connection testServer (11463270) : Translate hex = character.
as400: Connection testServer (11463270) : query optimize goal = 0.
as400: Connection testServer (11463270) : query storage limit = -1.
as400: Connection testServer (11463270) : Using extended datastreams.
as400: Connection testServer (11463270) : JDBC driver major version = 9.
as400: Connection testServer (11463270) : IBM i VRM = V6R1M0.
as400: Connection testServer (11463270) : Server CCSID = 870.
as400: Connection testServer (11463270) : Server functional level = V6R1M00014 (14).
as400: Connection testServer (11463270) : Server job identifier = 072485/QUSER/QZDASOINIT.
as400: Properties (16020374) : decimal separator = ".".
as400: Properties (16020374) : date format = "dmy".
as400: Properties (16020374) : date separator = "/".
as400: Properties (16020374) : time format = "hms".
as400: Properties (16020374) : time separator = ":".
as400: Connection S65AB7B0 (11463270) open.
as400: Connection S65AB7B0 (11463270) : Auto commit = "true".
as400: Connection S65AB7B0 (11463270) : Read only = "false".
as400: Connection S65AB7B0 (11463270) : Transaction isolation = "1".
as400: Connection S65AB7B0 (11463270) : Auto commit = "false".
as400: PreparedStatement STMT0001 (15696851) open. Parent: Connection S65AB7B0 (11463270) .
as400: PreparedStatement STMT0001 (15696851) : Escape processing = "true".
as400: PreparedStatement STMT0001 (15696851) : Fetch direction = "1000".
as400: PreparedStatement STMT0001 (15696851) : Fetch size = "0".
as400: PreparedStatement STMT0001 (15696851) : Max field size = "0".
as400: PreparedStatement STMT0001 (15696851) : Max rows = "0".
as400: PreparedStatement STMT0001 (15696851) : Query timeout = "0".
as400: PreparedStatement STMT0001 (15696851) : Result set concurrency = "1007".
as400: PreparedStatement STMT0001 (15696851) : Result set holdability = "1".
as400: PreparedStatement STMT0001 (15696851) : Result set type = "1003".
as400: PreparedStatement STMT0001 (15696851) : Behavior Override = "0".
as400: PreparedStatement STMT0001 (15696851) : Data to correlate statement with cursor Cursor CRSR0001 (12039161) .
as400: PreparedStatement STMT0001 (15696851) : Preparing [SELECT *SQLGENCOLUMNS FROM NEW TABLE(insert into test_v6r1 (id, value ) values (?, ?))].
as400: PreparedStatement STMT0001 (15696851) : Prepared STMT0001*, SQL Statement -->[SELECT *SQLGENCOLUMNS FROM NEW TABLE(insert into test_v6r1 (id, value ) values (?, ?))].
as400: PreparedStatement STMT0001 (15696851) : setInt().
as400: PreparedStatement STMT0001 (15696851) : parameter index: 1 value: 1.
as400: PreparedStatement STMT0001 (15696851) : setString().
as400: PreparedStatement STMT0001 (15696851) : parameter index: 2 value: Test: 2011-04-27 16:39:53.839.
as400: PreparedStatement STMT0001 (15696851) : Descriptor 1 created or changed.
as400: Cursor CRSR0001 (12039161) open.
as400: ResultSet CRSR0001 (13725633) open. Parent: PreparedStatement STMT0001 (15696851) .
as400: ResultSet CRSR0001 (13725633) : Conncurrency = "1007".
as400: ResultSet CRSR0001 (13725633) : Fetch direction = "1000".
as400: ResultSet CRSR0001 (13725633) : Fetch size = "0".
as400: ResultSet CRSR0001 (13725633) : Max rows = "0".
as400: ResultSet CRSR0001 (13725633) : Type = "1004".
as400: PreparedStatement STMT0001 (15696851) : Executed STMT0001*, SQL Statement --> [SELECT *SQLGENCOLUMNS FROM NEW TABLE(insert into test_v6r1 (id, value ) values (?, ?))].
as400: PreparedStatement STMT0001 (15696851) : Update count = 0.
as400: PreparedStatement STMT0001 (15696851) : Result set = false.
as400: PreparedStatement STMT0001 (15696851) : Number of result sets = 0.
as400: PreparedStatement STMT0001 (15696851) : Row count estimate = -1.
as400: Connection S65AB7B0 (11463270) : Fetching a block of data from the system.
PS1 - SQL insert affected 0 rows and returned 0 keys
PS1 - getUpdateCount()=0
as400: PreparedStatement STMT0002 (540190) open. Parent: Connection S65AB7B0 (11463270) .
as400: PreparedStatement STMT0002 (540190) : Escape processing = "true".
as400: PreparedStatement STMT0002 (540190) : Fetch direction = "1000".
as400: PreparedStatement STMT0002 (540190) : Fetch size = "0".
as400: PreparedStatement STMT0002 (540190) : Max field size = "0".
as400: PreparedStatement STMT0002 (540190) : Max rows = "0".
as400: PreparedStatement STMT0002 (540190) : Query timeout = "0".
as400: PreparedStatement STMT0002 (540190) : Result set concurrency = "1007".
as400: PreparedStatement STMT0002 (540190) : Result set holdability = "1".
as400: PreparedStatement STMT0002 (540190) : Result set type = "1003".
as400: PreparedStatement STMT0002 (540190) : Behavior Override = "0".
as400: PreparedStatement STMT0002 (540190) : Data to correlate statement with cursor Cursor CRSR0002 (19287723) .
as400: PreparedStatement STMT0002 (540190) : Preparing [insert into test_v6r1 (id, value) values (?, ?)].
as400: PreparedStatement STMT0002 (540190) : Prepared STMT0002*, SQL Statement -->[insert into test_v6r1 (id, value) values (?, ?)].
as400: PreparedStatement STMT0002 (540190) : setInt().
as400: PreparedStatement STMT0002 (540190) : parameter index: 1 value: 2.
as400: PreparedStatement STMT0002 (540190) : setString().
as400: PreparedStatement STMT0002 (540190) : parameter index: 2 value: Test: 2011-04-27 16:39:53.839.
as400: PreparedStatement STMT0002 (540190) : Descriptor 2 created or changed.
as400: PreparedStatement STMT0002 (540190) : Executed STMT0002*, SQL Statement --> [insert into test_v6r1 (id, value) values (?, ?)].
as400: PreparedStatement STMT0002 (540190) : Update count = 1.
as400: PreparedStatement STMT0002 (540190) : Result set = false.
as400: PreparedStatement STMT0002 (540190) : Number of result sets = 0.
as400: PreparedStatement STMT0002 (540190) : Row count estimate = -1.
PS2 - SQL insert affected 1 rows and returned 0 keys
PS2 - getUpdateCount()=1
as400: Connection S65AB7B0 (11463270) : Testing to see if cursors should be held..
as400: Connection S65AB7B0 (11463270) : Transaction commit.
as400: Cursor CRSR0001 (12039161) : Closing with reuse flag = 240.
as400: Cursor CRSR0001 (12039161) closed.
as400: ResultSet CRSR0001 (13725633) closed.
as400: PreparedStatement STMT0001 (15696851) closed.
as400: PreparedStatement STMT0002 (540190) closed.
as400: Connection S65AB7B0 (11463270) closed.
在使用标志RETURN_GENERATED_KEYS 时，最重要的一点应该是准备好的语句的准备方式。
在 V6R1 的情况下，这样的语句：
insert into test_v6r1 (id, value ) values (?, ?)
内部准备为：
SELECT *SQLGENCOLUMNS FROM NEW TABLE(insert into test_v6r1 (id, value ) values (?, ?))
如果是 V5R4 则正常准备：
insert into test_v6r1 (id, value ) values (?, ?)
PreparedStatement.executeUpdate() 的 Javadoc 说：
执行此中的 SQL 语句 PreparedStatement 对象，必须 是一种 SQL 数据操作语言 (DML) 语句，例如 INSERT， 更新或删除；或 SQL 语句 不返回任何内容，例如 DDL 声明。
返回： (1) SQL 数据操作语言的行数 (DML) 语句或 (2) 0 用于 SQL 语句 什么都不返回
并且执行的语句显然是 DML 语句。 我怀疑这是JTOpen/JT400 中的错误。 我试过 6.1 和 7.3 都一样。
【讨论】：
根据 JTOpen 的 Javadocs，AS400JDBCPreparedStatement 类说明如下：“返回：INSERT、UPDATE 或 DELETE 的行计数，或者 0 表示不返回任何内容的 SQL 语句。”请参阅此处的 Javadoc：publib.boulder.ibm.com/infocenter/iseries/v7r1m0/… 对我来说，这表示 select 语句包装了其他语句，因此作为 Select 它将返回零行。 请注意“从插入中选择”表达式可能会因为创建临时表而产生很大的性能开销……至少在 v6r1 中，这实际上消除了减少往返次数的任何好处.【参考方案2】：如果有帮助，我发现 *** 上的另一个帖子与您尝试做的非常相似： How to get the rows affected by an update
【讨论】：
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