MySQL存储过程例子
DELIMITER $$
DROP PROCEDURE IF EXISTS `fxmonkey`.`SPSearchSystemPerformance` $$
CREATE DEFINER=`root`@`localhost` PROCEDURE `SPSearchSystemPerformance`(
_systemName VARCHAR(30),
_pair VARCHAR(20),
_grossPlMax DOUBLE ,
_grossPlMin DOUBLE ,
...
_calcDate DATE
)
BEGIN
DECLARE _sql VARCHAR(2000);
SET @sql = '
SELECT systemID, systemName,pair, grossPL, pl,
numTrades, maxDD, profitFactor, pipsTrade, creationDate,
avgTradeTime, maxPos, riskAdjust, winPercent, po,
otherAPT, otherALT, otherLWT, otherLLT, otherDIS,
calcStartDate, calcEndDate
FROM TblSystemPerformance
WHERE 1 = 1
';
SET @sql = CONCAT(@sql, ' AND grossPL >= ' , _grossPlMin ,
' AND grossPL <= ' , _grossPlMax , ' ');
SET @sql = CONCAT(@sql, ' AND pl >= ' , _plMin ,
' AND pl <= ' , _plMax , ' ');
...
IF (_calcDate IS NOT NULL) THEN
SET @sql = CONCAT(@sql, ' AND YEAR(calcStartDate) = ', YEAR(_calcDate) ,
' AND MONTH(calcStartDate) = ', MONTH(_calcDate), ' ');
END IF;
IF (_creationDate IS NOT NULL) THEN
SET @sql = CONCAT(@sql, ' AND creationDate >= ', _creationDate ,' ');
END IF;
IF (_systemName IS NOT NULL) THEN
SET @sql = CONCAT(@sql, ' AND systemName = ''', _systemName , ''' ');
END IF;
IF (_pair IS NOT NULL) THEN
SET @sql = CONCAT(@sql, ' AND pair LIKE ''%', _pair , '%'' ');
END IF;
PREPARE stmt1 FROM @sql;
EXECUTE stmt1;
DEALLOCATE PREPARE stmt1;
END $$
DELIMITER ;
=======================================
DELIMITER $$
DROP PROCEDURE IF EXISTS `fxmonkey`.`SPIntelligentMiningDavid` $$
CREATE DEFINER=`root`@`localhost` PROCEDURE `SPIntelligentMiningDavid`()
BEGIN
Create TEMPORARY TABLE _TblSystemSeeds (
systemName varchar(30),
pair varchar(20)
);
INSERT _TblSystemSeeds
SELECT systemName, pair FROM (
SELECT systemName, pair, COUNT(systemID) 'ccc' FROM TblSystemPerformance
WHERE
(
( YEAR(calcStartDate) = 2009 AND MONTH(calcStartDate) in (1) )
OR
( YEAR(calcStartDate) = 2008 AND MONTH(calcStartDate) in (11,12) )
)
AND grossPl > 0
AND numTrades > 10 AND numTrades < 100
AND maxDd > -1000
AND maxPos < 5
GROUP BY systemName, pair
) consecutive
WHERE ccc > 1
;
SELECT COUNT(*) FROM _TblSystemSeeds;
SELECT COUNT(*) FROM _TblSystemSeeds seeds, TblSystemPerformance pers
WHERE seeds.systemName = pers.systemName AND seeds.pair = pers.pair
AND grossPL > 0
AND YEAR(pers.calcStartDate) = 2009 AND MONTH(pers.calcStartDate) in (2)
;
TRUNCATE TABLE _TblSystemSeeds;
DROP TABLE _TblSystemSeeds;
END $$
DELIMITER ;
===============================================
DELIMITER $$
DROP PROCEDURE IF EXISTS `DBName`.`StoredProcsName` $$
CREATE DEFINER=`root`@`169.181.251.0/255.255.255.0` PROCEDURE `StoredProcsName`(paraName Type)
BEGIN
Create TEMPORARY TABLE _rtn (
cid int null,
groupId varchar(15) null,
reportTypes varchar(200) null,
ReportingInd varchar(20) null,
MgnRiskInd varchar(20) null
said int null,
sa varchar(8) null);
insert _rtn
SELECT distinct _ClientId as ClientId,
SB.groupId,
'' as reportTypes,
case when (GRP.eqReportingInd ='Y')
then 'Reporting,'
else '' end as eqReportingInd,
case when (GRP.eqMarginInd='Y')
then 'Margin,'
case when (GRP.eqMgnRiskVirtualInd='Y')
then 'Margin & Risk (Virtual),' end as eqMgnRiskVirtualInd,
AH.SubAcctId AS SubAcct,
case when PFS.subAcct is null then '' else PFS.subAcct end as subAcct
FROM GroupSubAcct SB LEFT outer JOIN Group GRP ON (SB.groupId = GRP.groupId)
LEFT OUTER JOIN AcctHierarchy AH ON (SB.Id=AH.Id AND AH.accountType='SUB-ACCT')
LEFT OUTER JOIN SubAcct PFS ON (AH.SubAcctId=PFS.Id)
WHERE AH.ClientId=_ClientId GROUP BY AH.SubAcctId ORDER BY SB.groupId,AH.SubAcctId;
/* update temp table and concat all the strings*/
update _rtn
set reportTypes=
concat(eqReportingInd,eqMarginInd,eqAFCMEInd,eqRiskInd,eqAdminInd,eqInterestInd,
eqMgnRiskInd,eqMgnRiskVirtualInd);
/* remove the last ','*/
update _rtn
set reportTypes = Left(reportTypes,length(reportTypes)-1) where length(reportTypes)>0;
/* return */
select ClientId,
groupId,
case when reportTypes is null then '' else reportTypes end as reportTypes,
SubAcct,
subAcct
from _rtn order by groupId, SubAcct;
/*delte temp data*/
drop table _rtn;
END $$
DELIMITER ;