I need to create a sphinx query in my project with OR condition. But giving an OR condition like
select cost FROM transactionsChart WHERE cost=25 OR cost=5;
is not working. It returns an error like
ERROR 1064 (42000): sphinxql: syntax error, unexpected OR, expecting $end near 'OR cost=5'
Can anybody help me....
Thanks in advance
Sphinx doesnt support OR in the WHERE clause, only AND.
For your specific example, could use IN syntax,
sphinxql> SELECT cost FROM transactionsChart WHERE cost IN (5,25);
or a more general solution is to use a virtual attribute
sphinxql> SELECT cost, IF(cost=25 OR cost=5,1,0) AS filter
FROM transactionsChart WHERE filter = 1;
Try with
select cost FROM transactionsChart WHERE cost=25 | cost=5;
Source - Official Documentation
Related
For detecting the existence of a key in a hstore, I need to run a query like this:
SELECT * FROM tbl WHERE hst ? 'foo'
However, that gives me a PDOException:
PDOException: SQLSTATE[HY093]: Invalid parameter number: no parameters were bound: SELECT * FROM tbl WHERE hst ? 'foo'
Is there any way to escape the question mark so PDO won't pick it up as a placeholder? I've tried with up to four backslashes, as well as a double question mark (??), but nothing seems to persuade PDO to leave the question mark alone.
Use the function call form. According to the system catalogs, the hstore ? operator uses the exist function:
regress=# select oprname, oprcode from pg_operator where oprname = '?';
oprname | oprcode
---------+---------
? | exist
(1 row)
so you can write:
SELECT * FROM tbl WHERE exist(hst,'foo');
(Personally I'm not a big fan of hstore's operator-centric design and documentation, I think it discards the useful self-documenting properties of a function based interface without any real benefit and I usually use its function calls rather than its operators. Just because you can define operators doesn't mean you should.)
I had the same problem when searching on JSONB data. The full question is here
SELECT * FROM post WHERE locations ? :location;
The workaround on PostgreSQL 9.5 is similar:
SELECT * FROM post WHERE jsonb_exists(locations, :location);
I also opened a ticket at PHP bug tracing system
Update
As Diabl0 mentioned, the proposed solution work but does not use the index.
Tested with:
CREATE INDEX tempidxgin ON post USING GIN (locations);
I suggest you disable PDO native prepared statement so question marks will be ignored:
$pdo->setAttribute(\PDO::ATTR_EMULATE_PREPARES, true);
I create one sequence in postgres and fire one query which is mentioned below
SELECT M_PRODUCTSEQ.NEXTVAL from DUAL;
but it gives me the below error:
ERROR: relation "dual" does not exist.
Kindly help me out. How can i made the relation with dual?
PostgreSQL does NOT support the from DUAL syntax. It does however make the from portion of a query like this optional, so getting the next value (nextval) of a sequence you would do something like this:
SELECT nextval('m_productseq');
SELECT peridle, CPU
FROM (SELECT MAX(peridle) FROM try2);
While executing this query in hive I am getting following error
Parse Error: line 1:47 cannot recognize input near 'select' 'MAX' '(' in expression specification
Please suggest a solution how to use aggregate functions in hive subquery
At least two things need to be fixed here:
You are not returning fields named peridle or CPU from the sub-query, yet you are trying to select them.
Hive requires you to alias all sub-queries, even if you don't reference the alias. You can quickly do this by changing the ); at the end to ) x; (or however you want to call it).
I have a PostGIS query where I really need to have nested queries inside PostGIS function calls:
UPDATE raw.geocoding
SET the_geom = ST_Centroid(
ST_Collect(
SELECT the_geom
FROM raw.geocoding
WHERE hash = ((E'0101000020090C000081610F9CC5DC3341EE672E6E723B3241')::varchar),
SELECT the_geom
FROM raw.geocoding
WHERE hash = ((E'0101000020090C00002CF887E0C5DC3341C9E5B2DF2A383241')::varchar)
)
)
WHERE hash = ((E'3e638a27c6c38f05026252f4a0b57b2e')::varchar)
Unfortunately, this doesn't work. I get a syntax error at the beginning of the nested query:
ERROR: syntax error at or near "SELECT"
LINE 4: SELECT the_geom
^
********** Error **********
ERROR: syntax error at or near "SELECT"
SQL state: 42601
Character: 86
Looks like I cannot have a nested query as a PostGIS function parameter?
I've perused through the PostGIS documentation and cannot find any clear guidance for dealing with this.
It appears Postgres has a way of doing variables in pgSQL, but it's unclear to me how this would be pulled off in a standard query. This is a query that will be run tens or hundreds of thousands of times from a C# program. That aside, I could do a pgSQL stored procedure if required; just wanted to make sure there wasn't a simpler alternative first.
In case you were wondering, the query looks messy because it's the result of a npgsql-generated parameterized query. I think it's fair to say that npgsql is being extra-cautious with redundant typing and escaping.
I am running PostGIS 2.0.1, Postgres 9.1.5, and npgsql 2.0.12.
It sounds like you want a scalar subquery, an expression written like (SELECT ....) (note enclosing parentheses) that contains a query returning either zero rows (NULL result) or one field from one row.
You were most of the way there, you just needed the parens:
UPDATE raw.geocoding
SET the_geom = ST_Centroid(
ST_Collect(
(SELECT the_geom
FROM raw.geocoding
WHERE hash = ((E'0101000020090C000081610F9CC5DC3341EE672E6E723B3241')::varchar)),
(SELECT the_geom
FROM raw.geocoding
WHERE hash = ((E'0101000020090C00002CF887E0C5DC3341C9E5B2DF2A383241')::varchar))
)
)
WHERE hash = ((E'3e638a27c6c38f05026252f4a0b57b2e')::varchar)
Note that subqueries can be used in other places too - table returning subqueries can appear in FROM, for example. The PostgreSQL manual teaches about all this, and is well worth a cover-to-cover read.
If you're doing a lot of these updates, you may find it more efficient to formulate the UPDATE as a join using the PostgreSQL extension UPDATE ... FROM ... WHERE rather than running lots of individual UPDATEs over and over. I just wanted to raise the possibility. See from-list in UPDATE
i need to execute this query in postgres but i couldn't get rid of this error
ERROR: division by zero
SQL state: 22012
here is the query :
select id,rates_sum,rates_count from tbl_node order by rates_sum/rates_count DESC;
i know i can add a small value to the rates_count but i get inaccurate values .
Is there a way to make the postgres ignore this error ,or using if statement to check zeros and replace them with any number.
and again the error in the order by clause.
Thanks
Use a CASE statement:
SELECT
id,
rates_sum,
rates_count
FROM
tbl_node
ORDER BY
rates_sum / NULLIF(rates_count,0) DESC NULLS FIRST;
You could also use NULLS LAST, if you want to.
how about a where rates_count != 0?