写一个MySQL存储过程，读取txt文件数据导入MySQL数据

好的，以下是一个简单的MySQL存储过程，可以读取指定路径下的txt文件并将其数据导入到MySQL数据库中。需要注意的是，该存储过程只适用于数据格式为逗号分隔的txt文件，且第一行为表头的情况。

DELIMITER $$
CREATE PROCEDURE import_txt(IN file_path VARCHAR(255), IN table_name VARCHAR(255))
BEGIN
    DECLARE line VARCHAR(255);
    DECLARE col1 VARCHAR(255);
    DECLARE col2 VARCHAR(255);
    DECLARE col3 VARCHAR(255);
    DECLARE col4 VARCHAR(255);
    DECLARE col5 VARCHAR(255);
    DECLARE col6 VARCHAR(255);
    DECLARE col7 VARCHAR(255);
    DECLARE col8 VARCHAR(255);
    DECLARE col9 VARCHAR(255);
    DECLARE done INT DEFAULT FALSE;
    DECLARE cur CURSOR FOR SELECT * FROM information_schema.columns WHERE table_name = table_name;
    DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
    SET @sql = CONCAT('LOAD DATA LOCAL INFILE "', file_path, '" INTO TABLE ', table_name, ' FIELDS TERMINATED BY "," LINES TERMINATED BY "\r\n" IGNORE 1 LINES (', col1, ',', col2, ',', col3, ',', col4, ',', col5, ',', col6, ',', col7, ',', col8, ',', col9, ')');
    OPEN cur;
    read_loop: LOOP
        FETCH cur INTO line;
        IF done THEN
            LEAVE read_loop;
        END IF;
        IF line.COLUMN_NAME = 'col1' THEN
            SET col1 = CONCAT('`', line.COLUMN_NAME, '`');
        ELSEIF line.COLUMN_NAME = 'col2' THEN
            SET col2 = CONCAT('`', line.COLUMN_NAME, '`');
        ELSEIF line.COLUMN_NAME = 'col3' THEN
            SET col3 = CONCAT('`', line.COLUMN_NAME, '`');
        ELSEIF line.COLUMN_NAME = 'col4' THEN
            SET col4 = CONCAT('`', line.COLUMN_NAME, '`');
        ELSEIF line.COLUMN_NAME = 'col5' THEN
            SET col5 = CONCAT('`', line.COLUMN_NAME, '`');
        ELSEIF line.COLUMN_NAME = 'col6' THEN
            SET col6 = CONCAT('`', line.COLUMN_NAME, '`');
        ELSEIF line.COLUMN_NAME = 'col7' THEN
            SET col7 = CONCAT('`', line.COLUMN_NAME, '`');
        ELSEIF line.COLUMN_NAME = 'col8' THEN
            SET col8 = CONCAT('`', line.COLUMN_NAME, '`');
        ELSEIF line.COLUMN_NAME = 'col9' THEN
            SET col9 = CONCAT('`', line.COLUMN_NAME, '`');
        END IF;
    END LOOP;
    SET @sql = CONCAT('LOAD DATA LOCAL INFILE "', file_path, '" INTO TABLE ', table_name, ' FIELDS TERMINATED BY "," LINES TERMINATED BY "\r\n" IGNORE 1 LINES (', col1, ',', col2, ',', col3, ',', col4, ',', col5, ',', col6, ',', col7, ',', col8, ',', col9, ')');
    PREPARE stmt FROM @sql;
    EXECUTE stmt;
    CLOSE cur;
END$$
DELIMITER ;

使用方法：

1. 将上述存储过程复制到MySQL客户端中执行，创建存储过程。

2. 调用存储过程，传入文件路径和表名。

   CALL import_txt('file_path', 'table_name');

其中，`file_path`为txt文件的绝对路径，`table_name`为导入数据的目标表名。