Question

我在R中有代码，它应该生成并运行INSERT查询到本地MySQL数据库。连接有效，因为我能够运行其他几个查询，因此我知道连接和我的方法应该正常工作。我也打印出我正在尝试的查询，然后我粘贴到我的MySQL连接并且它可以工作，所以我不知道为什么R会抛出错误。我该怎么做才能解决这个问题？

查询：

INSERT INTO Strike SET effect =  '' , feet_above_ground =  '0' ; SET @Strike_id = LAST_INSERT_ID(); Insert INTO Flight SET date =  '1/1/00 0:00' , aircraft_type =  'Airplane' , record_id =  '200508' , strike_id = @Strike_id , airport_id = (SELECT id FROM Airport WHERE name =  'NEWARK LIBERTY INTL ARPT' ), airline_id = (SELECT id FROM Airline WHERE name =  'CONTINENTAL AIRLINES' ); UPDATE Strike SET flight_id = LAST_INSERT_ID() WHERE id = @Strike_id;

代码：

padValue <- function(value) {
    return(paste('"',value,'"', sep=""))
}
insertFlightAndStrike <- function(data, connection=con) {
    for(i in 1:nrow(data)) {
        row <- data[i,]
        effect = padValue(row$Effect..Impact.to.flight)
        feet_above_ground = padValue(row$Feet.above.ground)
        flight_date = padValue(row$FlightDate)
        aircraft_type = padValue(row$Aircraft..Type)
        record_id = padValue(row$Record.ID)
        airport_name = padValue(row$Airport..Name)
        airline_name = padValue(row$Aircraft..Airline.Operator)
        query <- paste("INSERT INTO Strike SET effect = ",effect,
            ", feet_above_ground = ",feet_above_ground,
            "; SET @Strike_id = LAST_INSERT_ID(); INSERT INTO Flight SET date = ", flight_date,
            ", aircraft_type = ", aircraft_type,
            ", record_id = ", record_id,
            ", strike_id = @Strike_id",
            ", airport_id = (SELECT id FROM Airport WHERE name = ", airport_name,
            "), airline_id = (SELECT id FROM Airline WHERE name = ", airline_name,");",
            "UPDATE Strike SET flight_id = LAST_INSERT_ID() WHERE id = @Strike_id;")
        print(gsub("\"","'",query))
        dbGetQuery(connection, gsub("\"","'",query))
    }
}

错误：

.local（conn，statement，...）出错：无法运行语句：SQL语法中有错误;检查与您的MySQL服务器版本相对应的手册，以便在＆＃39; SET @Strike_id = LAST_INSERT_ID（）附近使用正确的语法;插入INTO航班SET日期=＆＃39; 1/1/00 0:00＆＃39; ＆＃39;在第1行

编辑：

尝试在MySQL中使用查询时：

mysql> INSERT INTO Strike SET effect =  '' , feet_above_ground =  '0' ; SET @Strike_id = LAST_INSERT_ID(); INSERT INTO Flight SET date =  '1/1/00 0:00' , aircraft_type =  'Airplane' , record_id =  '200508' , strike_id = @Strike_id , airport_id = (SELECT id FROM Airport WHERE name =  'NEWARK LIBERTY INTL ARPT' ), airline_id = (SELECT id FROM Airline WHERE name =  'CONTINENTAL AIRLINES' ); UPDATE Strike SET flight_id = LAST_INSERT_ID() WHERE id = @Strike_id;
Query OK, 1 row affected (0.01 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 1 row affected (0.00 sec)

Query OK, 1 row affected (0.00 sec)
Rows matched: 1  Changed: 1  Warnings: 0

Answer 1

mysql> SET @Strike_id = LAST_INSERT_ID();
Query OK, 0 rows affected (0.02 sec)

适合我。

无法运行有效的MySQL查询

1 个答案: