mysql 判断是否已存在及插入表数据 的 简单存储过程

处理思路：
1、查找判断 相同数据是否已存在
2、如不存在，则执行Insert操作

CREATE PROCEDURE `mysql_sp_insert_data`(
IN p_TableName varchar(100) --表名
, IN p_ColumnNames varchar(200) --字段组合 ，以","分隔
, IN p_ColumnDatas varchar(500) --数据组成 ，以"@"分隔
)
NOT DETERMINISTIC
CONTAINS SQL
SQL SECURITY DEFINER
COMMENT ''
BEGIN
declare tmpExistDataCount int(4);
declare tmpWhere varchar(800);
declare tmpSqlStr varchar(1000);
declare tmpSqlToRun varchar(2000);
declare tmpSplitName varchar(10);
declare tmpSplitData varchar(10);
declare tmpNames varchar(800);
declare tmpDatas varchar(800);
declare tmpIndexName int(4);
declare tmpIndexData int(4);

set tmpNames = p_ColumnNames;
set tmpDatas = p_ColumnDatas;
set tmpSplitName = ",";
set tmpSplitData = "@";

set tmpWhere = " where 1 = 1 ";

select INSTR(tmpNames,tmpSplitName) into tmpIndexName;

if tmpIndexName > 0 then

while tmpIndexName > 0 do
select INSTR(tmpNames,tmpSplitName) into tmpIndexName;
select INSTR(tmpDatas,tmpSplitData) into tmpIndexData;

set tmpWhere = concat(tmpWhere , " and " , SUBSTRING(tmpNames,1,tmpIndexName -1) ," = ");
set tmpWhere = concat(tmpWhere , SUBSTRING(tmpDatas,1,tmpIndexData -1 ) );

set tmpNames = SUBSTRING(tmpNames,tmpIndexName + 1,LENGTH(tmpNames) - tmpIndexName);
set tmpDatas = SUBSTRING(tmpDatas,tmpIndexData + 1,LENGTH(tmpDatas) - tmpIndexData);

select INSTR(tmpNames,tmpSplitName) into tmpIndexName;

end while;

end if;

if LENGTH(tmpNames) > 0 then
set tmpWhere = concat(tmpWhere , " and " , tmpNames ," = ");
set tmpWhere = concat(tmpWhere , tmpDatas );
end if;

set tmpSqlStr = " select count(*) ";
set tmpSqlStr = concat(tmpSqlStr ," from ", p_TableName ,tmpWhere , " ; " );
set @sql1 = tmpSqlStr;
prepare tmpSqlToRun from @sql1;

select ( tmpSqlStr) into tmpExistDataCount;

if tmpExistDataCount = 0 then
set p_ColumnDatas = REPLACE(p_ColumnDatas,tmpSplitData,",");
set tmpSqlStr = " ";
set tmpSqlStr = concat(tmpSqlStr ," insert into " , p_TableName);
set tmpSqlStr = concat(tmpSqlStr ," ( ", p_ColumnNames, " ) values ( " ,p_ColumnDatas , " ) ;" );
SET @sql = tmpSqlStr;
prepare tmpSqlToRun from @sql;

-- select tmpSqlStr;

execute tmpSqlToRun;

end if;

END;

--测试
CREATE TABLE `table1` (
`field1` int(11) NOT NULL,
`field2` varchar(20) DEFAULT NULL,
`field3` datetime DEFAULT NULL,
PRIMARY KEY (`field1`)
) ENGINE=InnoDB DEFAULT CHARSET=gbk;

call mysql_sp_insert_data("table1","field1,field2,field3","1@'1'@null");