当我在 Snowflake 中运行我的查询时，它会继续运行，但如果没有 OR 语句，它会在几秒钟内运行

Question

I have a query where I select 3 columns from two tables. First I check if a clientnumber is in the list, for which I used a "IN" statement. Then I check if a clientnumber is also in another table so that both numbers are equal.

At last I want to exclude values that are ending on a certain value. And this is where it goes wrong.

When I have just a single "NOT LIKE" it runs perfectly fine but when I use a "OR NOT LIKE" after that it keeps on running.

See my query below:

SELECT "MAIL_ADDR", "ClientNumber", "CNumber" 
FROM "ADRESSES", CUSTOMERS
WHERE "ClientNumber" IN ('0000206302','0000206307','0000206309','0000206321'                                        
    AND "ClientNumber" = "CNumber"
    AND "MAIL_ADDR" NOT LIKE '%domain.nl' 
    OR "MAIL_ADDR" NOT LIKE '%domain.com'

I don't know what to change in my query as I don't get any error messages from Snowflake. Maybe it has something to do with performance issues.

Answer 1

The query could be rewritten to use JOIN syntax and condition for exclusion should be connected with AND :

SELECT "MAIL_ADDR", "ClientNumber", "CNumber" 
FROM "ADRESSES"
JOIN CUSTOMERS
  ON "ClientNumber" = "CNumber"
WHERE "ClientNumber" IN ('0000206302','0000206307','0000206309','0000206321')
    AND "MAIL_ADDR" NOT LIKE '%domain.nl' 
    AND "MAIL_ADDR" NOT LIKE '%domain.com';

A more compact way is to use NOT LIKE ANY syntax:

SELECT "MAIL_ADDR", "ClientNumber", "CNumber" 
FROM "ADRESSES"
JOIN CUSTOMERS
  ON "ClientNumber" = "CNumber"
WHERE "ClientNumber" IN ('0000206302','0000206307','0000206309','0000206321')       
 AND NOT ("MAIL_ADDR" LIKE ANY ('%domain.nl', '%domain.com'));