我正在尝试用 Java 打印 plsql 变量值 (l_console_message)。然而,这种方法似乎并不奏效。我相信 ResultSet 位出了问题。我在这里缺少一些东西。知道出了什么问题吗?
PreparedStatement statement = null;
try {
statement = connection.prepareStatement("\n" +
" declare " + "\n" +
" p_schema_name varchar2(400):= upper('" + schema + "'); " + "\n" +
" p_temp_table_name varchar2(400) := upper('temp_table_jobs_name'); " + "\n" +
" l_result varchar2(400); " + "\n" +
" l_owner varchar2(200); " + "\n" +
" l_job_name varchar2(200); " + "\n" +
" l_enabled varchar2(200); " + "\n" +
" l_console_message varchar2(4000); " + "\n" +
" cursor c1_temp_table_name is " + "\n" +
" select " + "\n" +
" table_name " + "\n" +
" from all_tables " + "\n" +
" where table_name = p_temp_table_name; " + "\n" +
" begin " + "\n" +
" open c1_temp_table_name; " + "\n" +
" fetch c1_temp_table_name into l_result; " + "\n" +
" if c1_temp_table_name %notfound then " + "\n" +
" execute immediate ' " + "\n" +
" create table '||p_schema_name||'.'||p_temp_table_name||' ( " + "\n" +
" schema_name varchar2 (1000), " + "\n" +
" job_name varchar2(1000), " + "\n" +
" status varchar2(100) " + "\n" +
" )'; " + "\n" +
" l_console_message := p_temp_table_name||' created.'; " + "\n" +
" dbms_output.put_line (l_console_message); " + "\n" +
" end if; " + "\n" +
" close c1_temp_table_name; " + "\n" +
" exception when others then " + "\n" +
" null; " + "\n" +
" end;");
ResultSet rs = statement.execute();
while (rs.next()){
System.out.println(rs.getString(l_console_message));
}
}
catch (SQLException e) {
System.out.println("ERROR: Unable to run SQL statements for schema " + schema + " in beforeMigrate: " + e.getMessage());
}
finally {
if (null != statement) {
try {
statement.close();
}
catch (SQLException se) {
System.out.println("ERROR: Unable to close statement in beforeMigrate: " + se.getMessage());
}
}
}
提前致谢:-)
最佳答案
评论中链接的问题显示了您需要做什么的示例,但您似乎很难将其转化为您的情况。
您的匿名 block 不会(也不能)返回结果集,因此它不应该作为查询执行,也不应该是准备好的语句;您需要有一个可调用语句:
CallableStatement statement = null;
try {
statement = connection.prepareStatement("\n" +
...
然后您需要将 PL/SQL 变量的值分配给绑定(bind)变量占位符:
...
" l_console_message := p_temp_table_name||' created.'; " + "\n" +
" ? := l_console_message; " + "\n" +
" end if; " + "\n" +
...
或者根本没有l_console_message
(因此甚至不需要声明),只需将字符串直接分配给绑定(bind)变量占位符即可:
...
" ? := p_temp_table_name||' created.'; " + "\n" +
" end if; " + "\n" +
...
无论如何,dbms_output
调用在这里都没用。 (实际上您可能从 Java 检索 dbms_output
缓冲区,但这需要更多工作)。
然后您需要声明一个 OUT 绑定(bind)变量来接收字符串,并使用 execute()
而不是 executeQuery()
调用语句:
statement.registerOutParameter(1, Types.VARCHAR);
statement.execute();
然后您可以检索已放入绑定(bind)变量的字符串值;例如将其直接打印到控制台:
System.out.println(statement.getString(1));
ResultSet
、rs
和循环已完全消失。
关于java - 将匿名 block 中的 plsql 变量值打印到 Java,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/36642758/