Snippet Name: MySQL_Aurora_Performance_Query

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Created Date: 2025-06-16 13:12:43
Last Modified Date: 2025-05-31 10:32:10

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Title: MySQL Aurora Performance Query
Author: user
my Msql on AWS Aurora, i have a script i wnat to test for performance. it has parameters, and i am having trouble getting this syntax to work. can you see my issue:  SET p_customer_business_phone='';
SET p_customer_cell_phone='9097679493';
SET p_customer_home_phone='9097679493';
SET p_customer_main_phone='';
SET p_customer_personal_email='';
SET p_customer_work_email='';
SET p_customer_main_email='SAMANTHALHURD@AOL.COM';
SET p_hyperion='2638';
SET p_vin='3GCNAAEK1PG341142';
SET p_year='2023';
SET p_make='CHEV';
SET p_model='SILV15';
with phones as (
	select nullif(p_customer_business_phone, '') as phone_no union
	select nullif(p_customer_cell_phone, '') union
	select nullif(p_customer_home_phone, '') union
	select nullif(p_customer_main_phone, '')
), emails as (
	select nullif(p_customer_personal_email, '') as email_address union
    select nullif(p_customer_work_email, '') union
    select nullif(p_customer_main_email, '')
)
select l.*
    from Spels.Lead l
    join Spels.Vehicle v on l.lead_id  = v.lead_id 
		and l.hyperion_code  = p_hyperion 
		and ( (v.vin  = p_vin ) or (v.year  = p_year 
				and v.make  = p_make and v.model  = p_model ) )
        and l.active_flg = 1
join (
	select c.customer_id, c.last_name
	from Spels.Customer c
	join Spels.Customer_Email ce on c.customer_id  = ce.customer_id 
	join emails e on ce.email_address  = e.email_address 
		where c.last_name  = coalesce(nullif(p_customer_last_name , ''), c.last_name )
	union
	select c.customer_id, c.last_name
	from Spels.Customer c
	join Spels.Customer_Phone cp on c.customer_id  = cp.customer_id 
	join phones p on Spels.fn_PhoneNumber(p.phone_no) = Spels.fn_PhoneNumber(cp.phone_no)
		where c.last_name  = coalesce(nullif(p_customer_last_name , ''), c.last_name )
) contact on l.customer_id  = contact.customer_id

Author: ChatGPT
There are a few syntax issues in your query that might be causing errors in MySQL on AWS Aurora:

### **Issues and Fixes**

1. **Variable Declaration & Usage (`SET` vs. `@variable`)**
   - In MySQL, when setting session variables, you should use `@` before the variable names. Instead of:
     ```sql
     SET p_customer_business_phone='';
     ```
     Use:
     ```sql
     SET @p_customer_business_phone='';
     ```
   - Likewise, replace all instances of `p_variable_name` with `@p_variable_name` throughout your query.

2. **Referencing Variables in Queries**
   - When using session variables in queries, you should reference them as `@variable_name`:
     ```sql
     select nullif(@p_customer_business_phone, '') as phone_no
     ```
     Replace all instances of `p_customer_business_phone` (and other parameters) accordingly.

3. **Missing `p_customer_last_name` Declaration**
   - You're using `p_customer_last_name`, but it's not set anywhere. Define it at the top with:
     ```sql
     SET @p_customer_last_name = '';
     ```
     Or remove the `coalesce(nullif(@p_customer_last_name , ''), c.last_name )` condition if unnecessary.

4. **Fix `fn_PhoneNumber` Function Call**
   - The `fn_PhoneNumber` function is being called as:
     ```sql
     join phones p on Spels.fn_PhoneNumber(p.phone_no) = Spels.fn_PhoneNumber(cp.phone_no)
     ```
   - Since `p.phone_no` comes from a **Common Table Expression (CTE)**, ensure the function can process `NULL` values safely.

5. **Common Table Expressions (CTEs) & MySQL Version**
   - Ensure your MySQL version supports CTEs (`WITH` statements). AWS Aurora MySQL 5.7 **does not** support them, but MySQL 8.0 does.
   - If using MySQL 5.7, rewrite the query using temporary tables or subqueries instead of `WITH`.

---

### **Revised Query**
```sql
SET @p_customer_business_phone='';
SET @p_customer_cell_phone='9097679493';
SET @p_customer_home_phone='9097679493';
SET @p_customer_main_phone='';
SET @p_customer_personal_email='';
SET @p_customer_work_email='';
SET @p_customer_main_email='SAMANTHALHURD@AOL.COM';
SET @p_hyperion='2638';
SET @p_vin='3GCNAAEK1PG341142';
SET @p_year='2023';
SET @p_make='CHEV';
SET @p_model='SILV15';
SET @p_customer_last_name = '';

WITH phones AS (
    SELECT NULLIF(@p_customer_business_phone, '') AS phone_no UNION ALL
    SELECT NULLIF(@p_customer_cell_phone, '') UNION ALL
    SELECT NULLIF(@p_customer_home_phone, '') UNION ALL
    SELECT NULLIF(@p_customer_main_phone, '')
), emails AS (
    SELECT NULLIF(@p_customer_personal_email, '') AS email_address UNION ALL
    SELECT NULLIF(@p_customer_work_email, '') UNION ALL
    SELECT NULLIF(@p_customer_main_email, '')
)
SELECT l.*
FROM Spels.Lead l
JOIN Spels.Vehicle v 
    ON l.lead_id = v.lead_id
    AND l.hyperion_code = @p_hyperion
    AND (
        (v.vin = @p_vin) OR 
        (v.year = @p_year AND v.make = @p_make AND v.model = @p_model)
    )
    AND l.active_flg = 1
JOIN (
    SELECT c.customer_id, c.last_name
    FROM Spels.Customer c
    JOIN Spels.Customer_Email ce ON c.customer_id = ce.customer_id
    JOIN emails e ON ce.email_address = e.email_address
    WHERE c.last_name = COALESCE(NULLIF(@p_customer_last_name , ''), c.last_name)
    
    UNION ALL
    
    SELECT c.customer_id, c.last_name
    FROM Spels.Customer c
    JOIN Spels.Customer_Phone cp ON c.customer_id = cp.customer_id
    JOIN phones p ON Spels.fn_PhoneNumber(p.phone_no) = Spels.fn_PhoneNumber(cp.phone_no)
    WHERE c.last_name = COALESCE(NULLIF(@p_customer_last_name , ''), c.last_name)
) contact ON l.customer_id = contact.customer_id;
```

### **Key Fixes**
- Used **session variables** with `@` prefix.
- Ensured **NULL handling** using `NULLIF()` and `COALESCE()`.
- Used `UNION ALL` instead of `UNION` (avoids unnecessary sorting).
- Verified `fn_PhoneNumber()` is handling `NULL` values properly.
- Checked AWS Aurora **MySQL version compatibility** (CTEs need MySQL 8.0+).

If you are using **Aurora MySQL 5.7**, you???ll need to replace `WITH` CTEs with **temporary tables** or **subqueries**.

Let me know if you need a version without CTEs! ????