What would be the right way to write a Hive query with multiple LIKE operators like this:
SELECT *
FROM some_table
WHERE
some_col LIKE '%abc%'
OR
some_col LIKE '%xyz%'
OR
some_col LIKE '%pqr%'
OR
... (some more LIKE statements)
I tried doing the above as well as
WHERE some_col LIKE '%abc|pqr|xyz%'
but they didn't return any results. It works fine if I write separate queries, i.e.
WHERE some_col LIKE '%abc%' -> returns results
and
WHERE some_col LIKE '%pqr%' -> also returns results
From the docs:
A RLIKE B
NULL if A or B is NULL, TRUE if any (possibly empty) substring of A matches the Java regular expression B, otherwise FALSE. For example, 'foobar' RLIKE 'foo' evaluates to TRUE and so does 'foobar' RLIKE '^f.*r$'.
A REGEXP B
Same as RLIKE.
So, use
WHERE some_col RLIKE 'abc|pqr|xyz'
You can probably use rlike(regular_expression).
WHERE some_col RLIKE '*abc*|*pqr*|*xyz*'
I believe that the issue might be you need to group the like statement. Your Example done:
SELECT *
FROM some_table
WHERE
(some_col LIKE '%abc%'
OR
some_col LIKE '%xyz%'
OR
some_col LIKE '%pqr%')
You can try to use UNION if you have to use multiple condition in LIKE like this:
SELECT * FROM some_table WHERE some_col LIKE '%abc%'
UNION
SELECT * FROM some_table WHERE some_col LIKE '%xyz%'
UNION
SELECT * FROM some_table WHERE some_col LIKE '%pqr%'
If all you need is to check for a list of specific substrings, you could use a different approach e.g.
WHERE InStr(some_col, 'abc') +InStr(some_col, 'pqr') +... >0
来源：https://stackoverflow.com/questions/33626645/hive-query-with-multiple-like-operators