java - ORA-01461 对于继承的 char(1 字节)列 - 需要使用 Spring JDBC(扩展 StoredProcedure)使其工作

Question

我有一个这样的SP

create or replace PROCEDURE myproc
  myvar in out mytable.mycol%TYPE

其中 mycol 是 char(1 字节)

从 java 代码，我尝试将一个字符串/字符绑定(bind)到这个变量，我得到了

ORA-01461 - can bind a LONG value only for insert into a LONG column

如果我替换为

 myvar in out varchar2

然后就可以了

关于如何正确绑定(bind)来自 Java 代码的值有什么想法吗？

我真的很想继续使用 %type 作为存储过程输入参数

附言。这不是ORA-01461: can bind a LONG value only for insert into a LONG column-Occurs when querying的复制品因为它引用了一个 char(1) 列

更新

为此添加更多信息

import java.sql.CallableStatement;
import java.sql.Clob;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;

import oracle.jdbc.pool.OracleDataSource;

public class SimpleDbStandalonePureJdbcTest {

    public static void main(String[] args) throws SQLException {

        OracleDataSource ods = new OracleDataSource();

        ods.setUser("xxx");
        ods.setPassword("xxx");
        ods.setServerName("xxx");
        ods.setPortNumber(xxx);
        ods.setDriverType("thin");
        ods.setNetworkProtocol("tcp");
        ods.setDatabaseName("xxx");

        Connection conn = ods.getConnection();
        CallableStatement sp = conn.prepareCall("{call testleosp(?)} ");

        Clob clob = conn.createClob();
        clob.setString(1, "b");
        sp.setClob(1, clob);
        sp.registerOutParameter(1, Types.CLOB);
        boolean hadResults = sp.execute();

        while (hadResults) {
            ResultSet rs = sp.getResultSet();
            System.out.println(rs.getClob(1));
            hadResults = sp.getMoreResults();
        }

    }

}

上面的代码有效(但听起来非常错误)

表格是

create table testleo (col1 char(1 byte))

SP是

create or replace PROCEDURE testleosp (
    io_col IN OUT testleo.col1%TYPE
)
IS
BEGIN
    INSERT INTO testleo (col1) VALUES (io_col);
    COMMIT WORK;
END;

如果我用这个

import java.io.IOException;
import java.io.Reader;
import java.sql.CallableStatement;
import java.sql.Clob;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Types;
import java.util.HashMap;
import java.util.Map;

import javax.sql.DataSource;

import org.jboss.jca.adapters.jdbc.WrappedConnection;
import org.springframework.jdbc.core.SqlInOutParameter;
import org.springframework.jdbc.core.SqlReturnType;
import org.springframework.jdbc.core.support.SqlLobValue;
import org.springframework.jdbc.object.StoredProcedure;
import org.springframework.jdbc.support.lob.DefaultLobHandler;
import org.springframework.jdbc.support.lob.OracleLobHandler;
import org.springframework.jdbc.support.nativejdbc.SimpleNativeJdbcExtractor;

import oracle.jdbc.pool.OracleDataSource;

public class SimpleDbStandaloneTest2 extends StoredProcedure {

    public SimpleDbStandaloneTest2(DataSource ds, String sp) {

        super(ds, sp);
        declareParameter(new SqlInOutParameter("io_col", Types.CLOB,null,new CLOBToStringConverter()));
//      declareParameter(new SqlInOutParameter("io_col", Types.CLOB));
        compile();
    }

    class CLOBToStringConverter implements SqlReturnType {

        @Override
        public Object getTypeValue(CallableStatement cs, int paramIndex, int sqlType, String typeName)
                throws SQLException {
            Clob aClob = cs.getClob(paramIndex);

            final Reader clobReader = aClob.getCharacterStream();

            int length = (int) aClob.length();
            char[] inputBuffer = new char[1024];
            final StringBuilder outputBuffer = new StringBuilder();
            try {
                while ((length = clobReader.read(inputBuffer)) != -1) {
                    outputBuffer.append(inputBuffer, 0, length);
                }
            } catch (IOException e) {
                throw new SQLException(e.getMessage());
            }

            return outputBuffer.toString();
        }
    }

    public Map<String, Object> execute() {

        Map<String, Object> inputs = new HashMap<>();
        Connection conn = null;
        WrappedConnection wc = null;

        try {

            conn = getJdbcTemplate().getDataSource().getConnection();

            if (conn instanceof WrappedConnection) {

                // this runs when the app is running from inside jboss
                wc = (WrappedConnection) conn;

            } else {

            }

            //https://docs.spring.io/spring/docs/3.2.18.RELEASE/javadoc-api/org/springframework/jdbc/support/lob/OracleLobHandler.html
            OracleLobHandler lh = new OracleLobHandler();
            lh.setNativeJdbcExtractor(new SimpleNativeJdbcExtractor());
            //ERROR org.springframework.jdbc.support.lob.OracleLobHandler - Could not free Oracle LOB              
            //inputs.put("io_col",new SqlLobValue("f",lh));

            LobHandler h = new  DefaultLobHandler();    
            inputs.put("io_col",new SqlLobValue("f",h));


        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            /* Close the connections manually to prevent connection leak */
            try {
                if (wc != null && !wc.isClosed())
                    wc.close();
            } catch (SQLException e) {
            }

            try {
                if (conn != null)
                    conn.close();
            } catch (SQLException e) {
            }
            /* Close the connections manually to prevent connection leak */
        }

        Map<String, Object> outMap = execute(inputs);
        return outMap;
    }

    public static void main(String[] args) throws SQLException {

        OracleDataSource ods = new OracleDataSource();

        ods.setUser("xxx");
        ods.setPassword("xxx");
        ods.setServerName("xxx");
        ods.setPortNumber(xxx);
        ods.setDriverType("thin");
        ods.setNetworkProtocol("tcp");
        ods.setDatabaseName("xxxx");

        SimpleDbStandaloneTest2 t = new SimpleDbStandaloneTest2(ods, "TESTLEOSP");

        Map<String, Object> map = t.execute();

        System.out.println(map);
    }

}

它也可以工作，但是它会抛出这样的异常

Exception in thread "main" org.springframework.jdbc.UncategorizedSQLException: CallableStatementCallback; uncategorized SQLException for SQL [{call TESTLEOSP(?)}]; SQL state [99999]; error code [17012]; Parameter Type Conflict; nested exception is java.sql.SQLException: Parameter Type Conflict
    at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:84)
    at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:81)
    at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:81)
    at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:1099)
    at org.springframework.jdbc.core.JdbcTemplate.call(JdbcTemplate.java:1135)
    at org.springframework.jdbc.object.StoredProcedure.execute(StoredProcedure.java:142)
Caused by: java.sql.SQLException: Parameter Type Conflict

oracle驱动信息

Manifest-Version: 1.0
Ant-Version: Apache Ant 1.7.1
Created-By: 20.12-b01 (Sun Microsystems Inc.)
Implementation-Vendor: Oracle Corporation
Implementation-Title: JDBC
Implementation-Version: 12.1.0.1.0
Repository-Id: JAVAVM_12.1.0.1.0_LINUX.X64_130403
Specification-Vendor: Sun Microsystems Inc.
Specification-Title: JDBC
Specification-Version: 4.0
Main-Class: oracle.jdbc.OracleDriver
sealed: true

关于 Oracle 数据库的信息

SELECT * FROM V$VERSION
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
PL/SQL Release 11.2.0.4.0 - Production
"CORE   11.2.0.4.0  Production"
TNS for IBM/AIX RISC System/6000: Version 11.2.0.4.0 - Production
NLSRTL Version 11.2.0.4.0 - Production

关于数据库字符集的信息

SELECT * FROM NLS_DATABASE_PARAMETERS
NLS_LANGUAGE    AMERICAN
NLS_TERRITORY   AMERICA
NLS_CURRENCY    $
NLS_ISO_CURRENCY    AMERICA
NLS_NUMERIC_CHARACTERS  .,
NLS_CHARACTERSET    WE8ISO8859P1
NLS_CALENDAR    GREGORIAN
NLS_DATE_FORMAT DD-MON-RR
NLS_DATE_LANGUAGE   AMERICAN
NLS_SORT    BINARY
NLS_TIME_FORMAT HH.MI.SSXFF AM
NLS_TIMESTAMP_FORMAT    DD-MON-RR HH.MI.SSXFF AM
NLS_TIME_TZ_FORMAT  HH.MI.SSXFF AM TZR
NLS_TIMESTAMP_TZ_FORMAT DD-MON-RR HH.MI.SSXFF AM TZR
NLS_DUAL_CURRENCY   $
NLS_COMP    BINARY
NLS_LENGTH_SEMANTICS    BYTE
NLS_NCHAR_CONV_EXCP FALSE
NLS_NCHAR_CHARACTERSET  AL16UTF16
NLS_RDBMS_VERSION   11.2.0.4.0
NLS_CSMIG_SCHEMA_VERSION    5

我请求的 java LOCALE 信息是使用此代码生成的

import java.util.Locale;

public class JavaLocale {

    public static void main(String[] args) {
        Locale currentLocale = Locale.getDefault();

        System.out.println(currentLocale.getDisplayLanguage());
        System.out.println(currentLocale.getDisplayCountry());

        System.out.println(currentLocale.getLanguage());
        System.out.println(currentLocale.getCountry());

        System.out.println(System.getProperty("user.country"));
        System.out.println(System.getProperty("user.language"));

    }

}

打印

English United States en US US en

首先，我不想使用任何已弃用的代码。

其次，我不想要任何取消分配异常。

第三次更改 DB 和 SP 不是选项(为什么他们应该这样做？)

附言。我认为这可能与https://support.oracle.com/knowledge/Middleware/370438_1.html有关不幸的是我无权访问此存储库

提前致谢

Answer 1

我是这样解决这个问题的。不幸的是，我无法避免 CLOB。

import java.io.IOException;
import java.io.Reader;
import java.io.StringReader;
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Types;
import java.util.HashMap;
import java.util.Map;

import javax.sql.DataSource;

import org.jboss.jca.adapters.jdbc.WrappedConnection;
import org.springframework.jdbc.core.SqlInOutParameter;
import org.springframework.jdbc.core.SqlReturnType;
import org.springframework.jdbc.object.StoredProcedure;
import org.springframework.jdbc.support.SqlValue;

import oracle.jdbc.pool.OracleDataSource;

public class SimpleDbStandaloneTest extends StoredProcedure {

    public SimpleDbStandaloneTest(DataSource ds, String sp) {

        super(ds, sp);
        declareParameter(new SqlInOutParameter("io_col", Types.CLOB, null, new SqlReturnType() {

            @Override
            public Object getTypeValue(CallableStatement cs, int paramIndex, int sqlType, String typeName)
                    throws SQLException {

                //not all methods work for both CLOB and Clob but at least getCharacterStream() does
                java.sql.Clob clob = (java.sql.Clob) cs.getObject(paramIndex,java.sql.Clob.class);

//              oracle.sql.CLOB clob = (oracle.sql.CLOB) cs.getObject(paramIndex,oracle.sql.CLOB.class);

                System.out.println(clob); //just checking, the jdbc driver returns the deprecated CLOB class

                Reader r = clob.getCharacterStream();
                char[] cbuf = new char[1];
                try {
                    r.read(cbuf);
                } catch (IOException e) {
                    e.printStackTrace();
                }
                return new String(cbuf);
            }

        }));
        compile();
    }


    public Map<String, Object> execute() {

        Map<String, Object> inputs = new HashMap<>();
        Connection conn = null;
        WrappedConnection wc = null;

        try {

            conn = getJdbcTemplate().getDataSource().getConnection();

            if (conn instanceof WrappedConnection) {

                // this runs when the app is running from inside jboss
                wc = (WrappedConnection) conn;

            } else {

            }

            inputs.put("io_col",new SqlValue() {

                @Override
                public void setValue(PreparedStatement ps, int paramIndex) throws SQLException {

                    Reader r = new StringReader("z");
                    ps.setClob(paramIndex, r);

                }

                @Override
                public void cleanup() {

                }

            });

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            /* Close the connections manually to prevent connection leak */
            try {
                if (wc != null && !wc.isClosed())
                    wc.close();
            } catch (SQLException e) {
            }

            try {
                if (conn != null)
                    conn.close();
            } catch (SQLException e) {
            }
            /* Close the connections manually to prevent connection leak */
        }

        Map<String, Object> outMap = execute(inputs);
        return outMap;
    }

    public static void main(String[] args) throws SQLException {

        OracleDataSource ods = getDataSource();

        SimpleDbStandaloneTest t = new SimpleDbStandaloneTest(ods, "TESTLEOSP");

        Map<String, Object> map = t.execute();

        System.out.println(map);
    }


    private static OracleDataSource getDataSource() throws SQLException {
        OracleDataSource ods = new OracleDataSource();
        (...)
        return ods;
    }

}

一些观察

1. 很遗憾，Oracle JDBC 驱动程序无法处理。
2. 另外，我不知道他们为什么继续使用已弃用的 oracle.sql.CLOB 类。
3. 我真的不想使用 CLOB，相信我，我已经尝试了很多东西。
4. 我认为这仍然是一个次优的解决方案，所以如果有人找到更好的解决方案并在此处发布，我会很高兴
5. 我将这个解决方案保留在这里有两个原因:首先是因为它表明这个问题不是重复的。其次，因为我相信好的堆栈溢出答案可以为此类问题提供客观且随时可用的答案。很明显，问题与字符集翻译有关。然而，这里重要的是一个适用于 IMO 的代码示例。