带exception的执行前,都会先起子事务在新申请一个和新子事务绑定的ExprContext,用完即毁。 注意这里有两类ExprContext 第一类是函数进入时就申请的,跟着plpgsql_estate_setup生成,这类ExprContext在整个调用流程结束时,会被plpgsql_exec_function主动释放,所以这类ExprContext不能再内部提前清理,否
1、产品的问题点 PG 存储过程和函数内对自治事务支持不完整 2、问题点背后涉及的技术原理 PG 的1个函数为1个原子操作, 要么全部回滚, 要么全部失败. (注意: exception里算一个新事务, 触发exception时, 函数体内的操作全部回滚, exception体内的执行如果正常则这个exception体内的变更操作可以提交.) 在函数内不能...
public Integer interpret(Context con) { try { return left.interpret(con) / right.interpret(con); } catch (ArithmeticException ae) { System.out.println("被除数为0!"); return -11111; } } } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. ...
package com.mengyb.myb.quartz; import com.mengyb.myb.pojo.SysScheduleTrigger; import com.mengyb.myb.utils.StringUtils; import com.mengyb.myb.utils.spring.SpringUtils; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import java.util.LinkedList; import java.util....
出现此问题一般都是代码格式错误,或者代码块中出现了PostgreSQL中不应该出现的语法,语法错误。 ERROR: cannot begin/end transactions in PL/pgSQL HINT: Use a BEGIN block with an EXCEPTION clause instead. CONTEXT: PL/pgSQL function “fun_td_xxx_xxx_result” line 845 at SQL statement *** 错误 ***...
*/ void BackgroundWriterMain(void) { /// pg_usleep(1000000L); /* * If an exception is encountered, processing resumes here. * * See notes in postgres.c about the design of this coding. */ if (!aurora && sigsetjmp(local_sigjmp_buf, 1) != 0) { /// /* * Do one cycle of ...
To resolve this issue, you need to specify the embedding model in theServiceContextobject. This object is used to specify the embedding model that will be used to embed the documents during index construction and any queries you make using the query engine later on. ...
context.Response.Write("这是无参数的ExecuteSQL:"+ i +""); i= pghelper.ExecuteNonQuery("update student set classid=113 where id=@id",newNpgsqlParameter("@id",4)); context.Response.Write("这是有参数的调用ExecuteNonQuery:"+ i +"");strings = pghelper.ExecuteScalar("select count(name) fro...
public static void main(String[] args) throws Exception { for (int i = 0; i < 100; i++) { Thread s = new DDLopt("tb_" + Integer.toString(i), 10); s.start(); } } } class DDLopt extends Thread { public DDLopt(String tbname, int colnum) { ...
check_hostname = False >>> ssl_context.verify_mode = ssl.CERT_NONE >>> con = pg8000.native.Connection( ... 'postgres', password="cpsnow", ssl_context=ssl_context) >>> con.run("SELECT 'Work is the curse of the drinking classes.'") [['Work is the curse of the drinking classes...