如何检测SQ​​LException的SQL错误状态

Question

我正在尝试创建一个JDBC连接池组件,但我遇到了一个问题.那就是:如何检测错误状态java.sql.SQLException.据说国家应遵循文件中的SQL2003惯例和XOPEN SQL惯例JDK.但我找不到关于这两个约定的任何文件.有人可以为我提供吗？

我想知道每个州代表什么,所以我可以决定何时完全关闭连接或重新连接.

我已经提到了源代码BoneCP.以下是发生SQLException时将激活的部分:

    ImmutableSet<String> sqlStateDBFailureCodes = ImmutableSet.of("08001", "08007", "08S01", "57P01", "HY000"); 
    String state = e.getSQLState();
        ConnectionState connectionState = this.getConnectionHook() != null ? this.getConnectionHook().onMarkPossiblyBroken(this, state, e) : ConnectionState.NOP; 
        if (state == null){ // safety;
            state = "08999"; 
        }

        if (((sqlStateDBFailureCodes.contains(state) || connectionState.equals(ConnectionState.TERMINATE_ALL_CONNECTIONS)) && this.pool != null) && this.pool.getDbIsDown().compareAndSet(false, true) ){
            logger.error("Database access problem. Killing off all remaining connections in the connection pool. SQL State = " + state);
            this.pool.connectionStrategy.terminateAllConnections();
            this.pool.poisonAndRepopulatePartitions();
        }
char firstChar = state.charAt(0);
        if (connectionState.equals(ConnectionState.CONNECTION_POSSIBLY_BROKEN) || state.equals("40001") || 
                state.startsWith("08") ||  (firstChar >= '5' && firstChar <='9') /*|| (firstChar >='I' && firstChar <= 'Z')*/){
            this.possiblyBroken = true;
        }

        // Notify anyone who's interested
        if (this.possiblyBroken  && (this.getConnectionHook() != null)){
            this.possiblyBroken = this.getConnectionHook().onConnectionException(this, state, e);
        }

根据这些代码,boneCP当SQLException的状态等于"08001","08007","08S01","57P01","HY000"之一时,将其视为数据库服务器崩溃.

但为什么,这些州代表什么呢？

Answer 1

前两个字符在SQL92规范的 "Table_23-SQLSTATE_class_and_subclass_values"中指定.

这是相关的摘录:

00  success completion
01  warning
02  no data
07  dynamic SQL error
08  connection exception
0A  feature not supported
21  cardinality violation
22  data exception
23  integrity constraint violation
24  invalid cursor state
25  invalid transaction state
26  invalid SQL statement name
27  triggered data change violation
28  invalid authorization specification
2A  direct SQL syntax error or access rule violation
2B  dependent privilege descriptors still exist
2C  invalid character set name
2D  invalid transaction termination
2E  invalid connection name
33  invalid SQL descriptor name
34  invalid cursor name
35  invalid condition number
37  dynamic SQL syntax error or access rule violation
3C  ambiguous cursor name
3D  invalid catalog name
3F  invalid schema name
40  transaction rollback
42  syntax error or access rule violation
44  with check option violation
HZ  remote database access

其余字符依赖于DB供应商.所以通常建议只进行startsWith()检查.