我们最近迁移到 AS400 上较新的 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行的数量，但没有发生什么(结果我们得到零返回)虽然行被定期插入.
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出现的情况插入的行未在 JDBC 或 Spring 中注册。
有人可以帮忙吗？
最佳答案
更新:这个issue已修复 JTOpen 7.6
我和 Ante 一起工作......这个问题与 Spring 无关，这是肯定的，因为我已经建立了一个使用普通 JDBC 和 PreparedStatements 的项目。
所以我将添加更多信息来模拟问题:
数据链接:
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.
当使用标志 RETURN_GENERATED_KEYS 时应该注意的最重要的事情是准备语句的准备方式。
在 V6R1 的情况下，这样的声明:
insert into test_v6r1 (id, value ) values (?, ?)
内部准备为:
SELECT *SQLGENCOLUMNS FROM NEW TABLE(insert into test_v6r1 (id, value ) values (?, ?))
在 V5R4 的情况下，它是正常准备的:
insert into test_v6r1 (id, value ) values (?, ?)
PreparedStatement.executeUpdate() 的 Javadoc说:
Executes the SQL statement in this PreparedStatement object, which must be an SQL Data Manipulation Language (DML) statement, such as INSERT, UPDATE or DELETE; or an SQL statement that returns nothing, such as a DDL statement.
Returns: either (1) the row count for SQL Data Manipulation Language (DML) statements or (2) 0 for SQL statements that return nothing
而且执行的语句明显是DML语句。 我怀疑这是 JTOpen/JT400 中的错误。 我试过 6.1 和 7.3，结果是一样的。
关于java - 通过JBDC获取在IBM DB2 V6R1 (AS400)上插入的行数，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/5803036/