如何将参数传递给具有union的mysql存储过程

时间：2018-03-02 03:45:16

标签： mysql stored-procedures union-all

我是MySQL的新手并尝试在存储过程中使用Stored Procedure和IF statement编写UNION ALL。但我不确定在查询中添加Where Condition的位置。

我在尝试： 

BEGIN
SELECT 'ele_certificate' AS CERTIFICATE, `ele_certificate` AS STATUS, `property_id` AS pid, `ELEcertificate_issue_date` AS OldExpiry, `ELEcertificate_expiry_date` AS NewExpiry, `ELEcertificate_duration` AS Duration, `ELEcertNotes` AS Notes, `property_code`, `property_added_date`, `property_address_1`, `property_address_2`, `property_address_3`, `property_city`, `property_cluster`, `property_area`, `property_postcode`, `property_landlord_id`, `property_status`, CONCAT(tbl_landlord.landlord_first_name,' ',tbl_landlord.landlord_middle_name,' ',tbl_landlord.landlord_last_name) AS fullName, tbl_landlord.landlord_work_number, tbl_landlord.landlord_mobile_number, tbl_landlord.landlord_main_email
FROM tbl_property LEFT OUTER JOIN tbl_landlord ON tbl_property.property_landlord_id=tbl_landlord.landlord_id
UNION ALL
SELECT 'eml_certificate', `eml_certificate`, `property_id`, `EMLcertificate_issue_date`, `EMLcertificate_expiry_date`, `EMLcertificate_duration`, `EMLcertNotes`, `property_code`, `property_added_date`, `property_address_1`, `property_address_2`, `property_address_3`, `property_city`, `property_cluster`, `property_area`, `property_postcode`, `property_landlord_id`, `property_status`, CONCAT(tbl_landlord.landlord_first_name,' ',tbl_landlord.landlord_middle_name,' ',tbl_landlord.landlord_last_name) AS fullName, tbl_landlord.landlord_work_number, tbl_landlord.landlord_mobile_number, tbl_landlord.landlord_main_email
FROM tbl_property LEFT OUTER JOIN tbl_landlord ON tbl_property.property_landlord_id=tbl_landlord.landlord_id
UNION ALL
SELECT 'epc_certificate', `epc_certificate`, `property_id`, `EPCcertificate_issue_date`, `EPCcertificate_expiry_date`, `EPCcertificate_duration`, `EPCcertNotes`, `property_code`, `property_added_date`, `property_address_1`, `property_address_2`, `property_address_3`, `property_city`, `property_cluster`, `property_area`, `property_postcode`, `property_landlord_id`, `property_status`, CONCAT(tbl_landlord.landlord_first_name,' ',tbl_landlord.landlord_middle_name,' ',tbl_landlord.landlord_last_name) AS fullName, tbl_landlord.landlord_work_number, tbl_landlord.landlord_mobile_number, tbl_landlord.landlord_main_email
FROM tbl_property LEFT OUTER JOIN tbl_landlord ON tbl_property.property_landlord_id=tbl_landlord.landlord_id
UNION ALL
SELECT 'fir_certificate', `fir_certificate`, `property_id`, `FIRcertificate_issue_date`, `FIRcertificate_expiry_date`, `FIRcertificate_duration`, `FIRcertNotes`, `property_code`, `property_added_date`, `property_address_1`, `property_address_2`, `property_address_3`, `property_city`, `property_cluster`, `property_area`, `property_postcode`, `property_landlord_id`, `property_status`, CONCAT(tbl_landlord.landlord_first_name,' ',tbl_landlord.landlord_middle_name,' ',tbl_landlord.landlord_last_name) AS fullName, tbl_landlord.landlord_work_number, tbl_landlord.landlord_mobile_number, tbl_landlord.landlord_main_email
FROM tbl_property LEFT OUTER JOIN tbl_landlord ON tbl_property.property_landlord_id=tbl_landlord.landlord_id
UNION ALL
SELECT 'gas_certificate', `gas_certificate`, `property_id`, `GAScertificate_issue_date`, `GAScertificate_expiry_date`, `GAScertificate_duration`, `GAScertNotes`, `property_code`, `property_added_date`, `property_address_1`, `property_address_2`, `property_address_3`, `property_city`, `property_cluster`, `property_area`, `property_postcode`, `property_landlord_id`, `property_status`, CONCAT(tbl_landlord.landlord_first_name,' ',tbl_landlord.landlord_middle_name,' ',tbl_landlord.landlord_last_name) AS fullName, tbl_landlord.landlord_work_number, tbl_landlord.landlord_mobile_number, tbl_landlord.landlord_main_email
FROM tbl_property LEFT OUTER JOIN tbl_landlord ON tbl_property.property_landlord_id=tbl_landlord.landlord_id
UNION ALL
SELECT 'hmo_certificate', `hmo_certificate`, `property_id`, `HMOcertificate_issue_date`, `HMOcertificate_expiry_date`, `HMOcertificate_duration`, `HMOcertNotes`, `property_code`, `property_added_date`, `property_address_1`, `property_address_2`, `property_address_3`, `property_city`, `property_cluster`, `property_area`, `property_postcode`, `property_landlord_id`, `property_status`, CONCAT(tbl_landlord.landlord_first_name,' ',tbl_landlord.landlord_middle_name,' ',tbl_landlord.landlord_last_name) AS fullName, tbl_landlord.landlord_work_number, tbl_landlord.landlord_mobile_number, tbl_landlord.landlord_main_email
FROM tbl_property LEFT OUTER JOIN tbl_landlord ON tbl_property.property_landlord_id=tbl_landlord.landlord_id
UNION ALL
SELECT 'ins_certificate', `ins_certificate`, `property_id`, `INScertificate_issue_date`, `INScertificate_expiry_date`, `INScertificate_duration`, `INScertNotes`, `property_code`, `property_added_date`, `property_address_1`, `property_address_2`, `property_address_3`, `property_city`, `property_cluster`, `property_area`, `property_postcode`, `property_landlord_id`, `property_status`, CONCAT(tbl_landlord.landlord_first_name,' ',tbl_landlord.landlord_middle_name,' ',tbl_landlord.landlord_last_name) AS fullName, tbl_landlord.landlord_work_number, tbl_landlord.landlord_mobile_number, tbl_landlord.landlord_main_email
FROM tbl_property LEFT OUTER JOIN tbl_landlord ON tbl_property.property_landlord_id=tbl_landlord.landlord_id;
END

此过程为我提供了正确的结果，我已在单个表上应用UNION ALL将列转换为行。

当我尝试将参数传递给程序时，我是在 Query后写的： 

BEGIN
SET @Certificates = ("SELECT 'ele_certificate' AS CERTIFICATE, `ele_certificate` AS STATUS, `property_id` AS pid, `ELEcertificate_issue_date` AS OldExpiry, `ELEcertificate_expiry_date` AS NewExpiry, `ELEcertificate_duration` AS Duration, `ELEcertNotes` AS Notes, `property_code`, `property_added_date`, `property_address_1`, `property_address_2`, `property_address_3`, `property_city`, `property_cluster`, `property_area`, `property_postcode`, `property_landlord_id`, `property_status`, CONCAT(tbl_landlord.landlord_first_name,' ',tbl_landlord.landlord_middle_name,' ',tbl_landlord.landlord_last_name) AS fullName, tbl_landlord.landlord_work_number, tbl_landlord.landlord_mobile_number, tbl_landlord.landlord_main_email
FROM tbl_property LEFT OUTER JOIN tbl_landlord ON tbl_property.property_landlord_id=tbl_landlord.landlord_id
UNION ALL
SELECT 'eml_certificate', `eml_certificate`, `property_id`, `EMLcertificate_issue_date`, `EMLcertificate_expiry_date`, `EMLcertificate_duration`, `EMLcertNotes`, `property_code`, `property_added_date`, `property_address_1`, `property_address_2`, `property_address_3`, `property_city`, `property_cluster`, `property_area`, `property_postcode`, `property_landlord_id`, `property_status`, CONCAT(tbl_landlord.landlord_first_name,' ',tbl_landlord.landlord_middle_name,' ',tbl_landlord.landlord_last_name) AS fullName, tbl_landlord.landlord_work_number, tbl_landlord.landlord_mobile_number, tbl_landlord.landlord_main_email
FROM tbl_property LEFT OUTER JOIN tbl_landlord ON tbl_property.property_landlord_id=tbl_landlord.landlord_id
UNION ALL
SELECT 'epc_certificate', `epc_certificate`, `property_id`, `EPCcertificate_issue_date`, `EPCcertificate_expiry_date`, `EPCcertificate_duration`, `EPCcertNotes`, `property_code`, `property_added_date`, `property_address_1`, `property_address_2`, `property_address_3`, `property_city`, `property_cluster`, `property_area`, `property_postcode`, `property_landlord_id`, `property_status`, CONCAT(tbl_landlord.landlord_first_name,' ',tbl_landlord.landlord_middle_name,' ',tbl_landlord.landlord_last_name) AS fullName, tbl_landlord.landlord_work_number, tbl_landlord.landlord_mobile_number, tbl_landlord.landlord_main_email
FROM tbl_property LEFT OUTER JOIN tbl_landlord ON tbl_property.property_landlord_id=tbl_landlord.landlord_id
UNION ALL
SELECT 'fir_certificate', `fir_certificate`, `property_id`, `FIRcertificate_issue_date`, `FIRcertificate_expiry_date`, `FIRcertificate_duration`, `FIRcertNotes`, `property_code`, `property_added_date`, `property_address_1`, `property_address_2`, `property_address_3`, `property_city`, `property_cluster`, `property_area`, `property_postcode`, `property_landlord_id`, `property_status`, CONCAT(tbl_landlord.landlord_first_name,' ',tbl_landlord.landlord_middle_name,' ',tbl_landlord.landlord_last_name) AS fullName, tbl_landlord.landlord_work_number, tbl_landlord.landlord_mobile_number, tbl_landlord.landlord_main_email
FROM tbl_property LEFT OUTER JOIN tbl_landlord ON tbl_property.property_landlord_id=tbl_landlord.landlord_id
UNION ALL
SELECT 'gas_certificate', `gas_certificate`, `property_id`, `GAScertificate_issue_date`, `GAScertificate_expiry_date`, `GAScertificate_duration`, `GAScertNotes`, `property_code`, `property_added_date`, `property_address_1`, `property_address_2`, `property_address_3`, `property_city`, `property_cluster`, `property_area`, `property_postcode`, `property_landlord_id`, `property_status`, CONCAT(tbl_landlord.landlord_first_name,' ',tbl_landlord.landlord_middle_name,' ',tbl_landlord.landlord_last_name) AS fullName, tbl_landlord.landlord_work_number, tbl_landlord.landlord_mobile_number, tbl_landlord.landlord_main_email
FROM tbl_property LEFT OUTER JOIN tbl_landlord ON tbl_property.property_landlord_id=tbl_landlord.landlord_id
UNION ALL
SELECT 'hmo_certificate', `hmo_certificate`, `property_id`, `HMOcertificate_issue_date`, `HMOcertificate_expiry_date`, `HMOcertificate_duration`, `HMOcertNotes`, `property_code`, `property_added_date`, `property_address_1`, `property_address_2`, `property_address_3`, `property_city`, `property_cluster`, `property_area`, `property_postcode`, `property_landlord_id`, `property_status`, CONCAT(tbl_landlord.landlord_first_name,' ',tbl_landlord.landlord_middle_name,' ',tbl_landlord.landlord_last_name) AS fullName, tbl_landlord.landlord_work_number, tbl_landlord.landlord_mobile_number, tbl_landlord.landlord_main_email
FROM tbl_property LEFT OUTER JOIN tbl_landlord ON tbl_property.property_landlord_id=tbl_landlord.landlord_id
UNION ALL
SELECT 'ins_certificate', `ins_certificate`, `property_id`, `INScertificate_issue_date`, `INScertificate_expiry_date`, `INScertificate_duration`, `INScertNotes`, `property_code`, `property_added_date`, `property_address_1`, `property_address_2`, `property_address_3`, `property_city`, `property_cluster`, `property_area`, `property_postcode`, `property_landlord_id`, `property_status`, CONCAT(tbl_landlord.landlord_first_name,' ',tbl_landlord.landlord_middle_name,' ',tbl_landlord.landlord_last_name) AS fullName, tbl_landlord.landlord_work_number, tbl_landlord.landlord_mobile_number, tbl_landlord.landlord_main_email
FROM tbl_property LEFT OUTER JOIN tbl_landlord ON tbl_property.property_landlord_id=tbl_landlord.landlord_id");
IF datepickerfilter1 != 0 AND datepickerfilter2 != 0 THEN
SELECT @Certificates + WHERE 
ELEcertificate_expiry_date BEGIN datepickerfilter1 AND datepickerfilter2 OR 
EMLcertificate_expiry_date BEGIN datepickerfilter1 AND datepickerfilter2 OR 
EPCcertificate_expiry_date BEGIN datepickerfilter1 AND datepickerfilter2 OR 
FIRcertificate_expiry_date BEGIN datepickerfilter1 AND datepickerfilter2 OR 
GAScertificate_expiry_date BEGIN datepickerfilter1 AND datepickerfilter2 OR 
HMOcertificate_expiry_date BEGIN datepickerfilter1 AND datepickerfilter2 OR 
INScertificate_expiry_date BEGIN datepickerfilter1 AND datepickerfilter2;
PREPARE smtp FROM @Certificates;
EXECUTE smtp;
END IF;
IF datepickerfilter1 != 0 AND datepickerfilter2 = 0 THEN
SELECT @Certificates + WHERE 
ELEcertificate_expiry_date = datepickerfilter1 OR EMLcertificate_expiry_date = datepickerfilter1 OR EPCcertificate_expiry_date = datepickerfilter1 OR FIRcertificate_expiry_date = datepickerfilter1 OR GAScertificate_expiry_date = datepickerfilter1 OR HMOcertificate_expiry_date = datepickerfilter1 OR INScertificate_expiry_date = datepickerfilter1;
PREPARE smtp FROM @Certificates;
EXECUTE smtp;
END IF;
IF datepickerfilter1 = 0 AND datepickerfilter2 != 0 THEN
SELECT @Certificates + WHERE 
ELEcertificate_expiry_date = datepickerfilter2 OR EMLcertificate_expiry_date = datepickerfilter2 OR EPCcertificate_expiry_date = datepickerfilter2 OR FIRcertificate_expiry_date = datepickerfilter2 OR GAScertificate_expiry_date = datepickerfilter2 OR HMOcertificate_expiry_date = datepickerfilter2 OR INScertificate_expiry_date = datepickerfilter2;
PREPARE smtp FROM @Certificates;
EXECUTE smtp;
END IF;
IF datepickerfilter1 = 0 AND datepickerfilter2 != 0 THEN
SELECT @Certificates;
PREPARE smtp FROM @Certificates;
EXECUTE smtp;
END IF;
END

在此我尝试将之前的结果存储在一个变量中，然后应用IF condition。但是我没能执行这个程序。

注意：

我在单个表格中列出了7个不同的expiry_date列，通过应用UNION ALL我将其转换为单个列。现在我尝试通过将参数传递给结果输出来过滤数据。

我用谷歌搜索了它，但没有得到适当的解决方案，欢迎任何形式的帮助，提前谢谢。

1 个答案:

答案 0 :(得分：0)

在运行时不评估局部变量（以@开头），在创建预准备语句之前，必须使用常规字符串变量来存储SQL。

像这样建立你的@certificates变量concat(...)：

IF datepickerfilter1 <> 0 AND datepickerfilter2 = 0 THEN

   set @Certificates = concat(@Certificates,
         " WHERE ELEcertificate_expiry_date ", 
         " BETWEEN '",datepickerfilter1,"' AND '",datepickerfilter2, "'" );
     /*I'm using one line as example, you must complete to meet your query*/

   PREPARE smtp FROM @Certificates;
   EXECUTE smtp;
   DEALLOCATE PREPARE smtp; -- important
END IF;

对其他准备好的陈述做同样的事。

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