return affectedRows; The following shows how to use the ProductDB class to update the name and price of the product: public class Main { public static void main(String[] args) { int updatedRows = ProductDB.update(1, "Phone Cover", 22.49); System.out.println("Updated Rows: " + updated...
pg_affected_rows— 返回受影响的记录数目 pg_cancel_query— 取消异步查询 pg_client_encoding— 取得客户端编码方式 pg_close— 关闭一个 PostgreSQL 连接 pg_connect_poll— 正在进行尝试轮询 PostgreSQL 链接状态。 pg_connect— 打开一个 PostgreSQL 连接 pg_connection_busy— 获知连接是否为忙 pg_connection_re...
A PERFORM statement sets FOUND true if it produces (and discards) one or more rows, false if no row is produced. UPDATE, INSERT, and DELETE statements set FOUND true if at least one row is affected, false if no row is affected. A FETCH statement sets FOUND true if it returns a row,...
import java.sql.*; import java.util.Properties; public class PostgreSQLUpdate { public static void main(String[] args ) { String url = null; String user = null; String password = null; int affectedrows = 0; String sql_str = "update users " + "set name = ? " + "where id = ?"...
executeUpdate(): Return the number of rows affected by the statement. Typically, you use this method for executing the INSERT, DELETE, or UPDATE statement. 4) Processing the ResultSet Once having a ResultSet object, you use a while loop to iterate over the result in the result set: while...
affectNum, err :=result.RowsAffected()iferr !=nil { log.Fatal(err) } fmt.Println("update affect rows is", affectNum) }//DELETEfunc (c *appContext) Delete() { stmt, err := c.db.Prepare("DELETE FROM users WHERE id = $1")iferr !=nil { ...
—-+——+———- (0 rows) – 视图触发器返回record测试, NEW 或者OLD record修改后会带来什么影响? – 创建触发器函数 digoal=> create or replace function tg() returns trigger as declarebegincaseTGOPwhen′INSERT′thenNEW.id:=NEW.id+1;raisenotice′returnNEW;when′UPDATE′thenNEW.id:=NEW.id+...
select SPLIT_PART(execute_sql_content,';',1) into sql_update;-- 执行获取到的SQL语句EXECUTEexecute_sql_content;GET DIAGNOSTICS rows_affected=ROW_COUNT;RAISE NOTICE'影响行数:%',rows_affected;execute_context_info :=execute_context_info||',影响行数为'||rows_affected::varchar||'条';RETURNQUERY...
Pgcli 是 PostgreSQL 的命令行工具,相比于 PostgreSQL 原生的命令行工具 psql,具有智能提示和语法高亮等功能。 Pgcli 是基于 python-prompt-toolkit 编写的。 网站: https://www.pgcli.com/ https:///dbcli/pgcli 以下测试的环境:操作系统版本:CentOS 7.6。数据库版本:PostgreSQL 14.3。Pgcli版本:3.4.1。 测试...
return xerror.Wrapf(err, xerror.DB, "postgresql: update progress affected rows error, rows: %d", rowNum) } return nil } func (s *PostgresqlDB) IsProgressExist(jobName string) (bool, error) { var count int if err := s.db.QueryRow(fmt.Sprintf("SELECT COUNT(*) FROM %s.progresses WH...