I have a query in Orientdb like this:
select out('E_MyEdge').#rid, creationUser from V_MyVertex where out('E_MyEdge').#rid <> creationUser
V_MyVertex is a vertex, E_MyEdge is an edge. creationUser is a property of type "LINK" from V_MyVertex, which is an "rid" (something like "#12:4"). The problem is both columns from result are kind of "rid", but the query returns also the rows which have the same value (for example #12:117 | #12:117), and I don't know how to exclude them from the result.
You could use
select out('E_MyEdge').#rid, creationUser from V_MyVertex where out('E_MyEdge').#rid NOT IN creationUser
Hope it helps
Related
I have the following table in kdb...
p:([]r:("(A|A(A|B|C|D).*)";"A(E|F|G|H|I).*";"A(J|K|L|M).*";"A(N|O|P|Q|R|S).*";"A(T|U|V|W|X|Y|Z).*";"B.*";"(C|C(A|B|C|D|E).*)";"C(F|G|H|I|J|K).*";"C(L|M|N|O|P|Q|R).*";"C(S|T|U|V|W|X|Y|Z).*";"D.*"))
r
----------------------
"(A|A(A|B|C|D).*)"
"A(E|F|G|H|I).*"
"A(J|K|L|M).*"
"A(N|O|P|Q|R|S).*"
"A(T|U|V|W|X|Y|Z).*"
"B.*"
"(C|C(A|B|C|D|E).*)"
"C(F|G|H|I|J|K).*"
"C(L|M|N|O|P|Q|R).*"
"C(S|T|U|V|W|X|Y|Z).*"
"D.*"
and the below function that parses each row of the table...
getRange:{$[x like "*(*";
[if[x like "(*"; x2:1#1_x; l:enlist x2; x:-1_(3_x)];
l,:enlist {(3#x),"-",(-3#x)} ssr[ssr[ssr[x;".";""];")";"]"];"(";"["];
if[((count l)>1)&(l[1] like "*A-*"); l[1]:ssr[l[1]; "A-";"0-9/A-"]];
:l];
:enlist ssr[x;".";""]
];
}
Which gives an output like this...
r1:raze getRange'[exec r from p]
q)r1
,"A"
"A[0-9/A-D]*"
"A[E-I]*"
"A[J-M]*"
"A[N-S]*"
"A[T-Z]*"
"B*"
,"C"
"C[0-9/A-E]*"
"C[F-K]*"
"C[L-R]*"
"C[S-Z]*"
"D*"
I'm parsing the rows so they can be inserted into a query similar to something like select from t where sym like raze getRange'[exec r from p][0]
What I'd like to be able to do is combine the first "single A" with the first "group of A" and the same with the C's (so it looks like below). But the problem I'm having is that those results can't be easily inserted into a query...
(,"A";"A[0-9/A-D]*")
,"A[E-I]*"
,"A[J-M]*"
,"A[N-S]*"
,"A[T-Z]*"
,"B*"
(,"C";"C[0-9/A-E]*")
,"C[F-K]*"
,"C[L-R]*"
,"C[S-Z]*"
,"D*"
Is there a way in q that I can do this? Essentially, select from t where sym like (enlist "A";"A[0-9/A-D]*")
Please let me know if you need any additional info. Thank you in advance.
For matching against multiple regexps we can do following
select from t where any sym like/:("A";"A[0-9/A-D]*")
If I have a jsonb column called value with fields such as:
{"id": "5e367554-bf4e-4057-8089-a3a43c9470c0",
"tags": ["principal", "reversal", "interest"],,, etc}
how would I find all the records containing given tags, e.g:
if given: ["reversal", "interest"]
it should find all records with either "reversal" or "interest" or both.
My experimentation got me to this abomination so far:
select value from account_balance_updated
where value #> '{}' :: jsonb and value->>'tags' LIKE '%"principal"%';
of course this is completely wrong and inefficient
Assuming you are using PG 9.4+, you can use the jsonb_array_elements() function:
SELECT DISTINCT abu.*
FROM account_balance_updated abu,
jsonb_array_elements(abu.value->'tags') t
WHERE t.value <# '["reversal", "interest"]'::jsonb;
As it turned out you can use cool jsonb operators described here:
https://www.postgresql.org/docs/9.5/static/functions-json.html
so original query doesn't have to change much:
select value from account_balance_updated
where value #> '{}' :: jsonb and value->'tags' ?| array['reversal', 'interest'];
in my case I also needed to escape the ? (??|) because I am using so called "prepared statement" where you pass query string and parameters to jdbc and question marks are like placeholders for params:
https://docs.oracle.com/javase/tutorial/jdbc/basics/prepared.html
I'm trying to replicate the following query usine Squeryl.
SELECT c.order_number,p.customer,p.base,(
SELECT sum(quantity) FROM "Stock" s where s.base = p.base
) as stock
FROM "Card" c, "Part" p WHERE c."partId" = p."idField";
I have the following code for selecting the Cards and Parts but I cannot see a way to add a sumation into the select clause.
from(cards, parts)((c,p) =>
where(c.partId === p.id)
select(c,p)
Any help is much appreciated!
In Squeryl, you can use any Queryable object in the from clause of your query. So, to create a subquery, something like the following should work for you:
def subQuery = from(stock)(s => groupBy(s.base) compute(sum(s.quantity)))
from(cards, parts, subquery)((c, p, sq) =>
where(c.partId === p.idField and sq.key === p.base)
select(c.orderNumber, p.customer, sq.measures))
Of course the field names may vary slightly, just guessing at the class definitions. If you want the whole object for cards and parts instead of the single fields from the original query - just change the select clause to: select(c, p, sq.measures)
I've got a table that resembles the following:
WORD WEIGHT WORDTYPE
a 0.3 common
the 0.3 common
gray 1.2 colors
steeple 2 object
I need to pull the weights for several different words out of the database at once. I could do:
SELECT * FROM word_weight WHERE WORD = 'a' OR WORD = 'steeple' OR WORD='the';
but it feels ugly and the code to generate the query is obnoxious. I'm hoping that there's a way I can do something like (pseudocode):
SELECT * FROM word_weight WHERE WORD = 'a','the';
You are describing the functionality of the in clause.
select * from word_weight where word in ('a', 'steeple', 'the');
If you want to pass the whole list in a single parameter, use array datatype:
SELECT *
FROM word_weight
WHERE word = ANY('{a,steeple,the}'); -- or ANY('{a,steeple,the}'::TEXT[]) to make explicit array conversion
If you are not sure about the value and even not sure whether the field will be an empty string or even null then,
.where("column_1 ILIKE ANY(ARRAY['','%abc%','%xyz%']) OR column_1 IS NULL")
Above query will cover all possibility.
I'm trying to write a SphinxQL query that would replicate the following MySQL in a Sphinx RT index:
SELECT id FROM table WHERE colA LIKE 'valA' AND (colB = valB OR colC = valC OR ... colX = valX ... OR colY LIKE 'valY' .. OR colZ LIKE 'valZ')
As you can see I'm trying to get all the rows where one string column matches a certain value, AND matches any one of a list of values, which mixes and matches string and integer columns / values)
This is what I've gotten so far in SphinxQL:
SELECT id, (intColA = intValA OR intColB = intValB ...) as intCheck FROM rt_index WHERE MATCH('#requiredMatch = requiredValue');
The problem I'm running into is in matching all of the potential optional string values. The best possible query (if multiple MATCH statements were allowed and they were allowed as expressions) would be something like
SELECT id, (intColA = intValA OR MATCH('#checkColA valA|valB') OR ...) as optionalMatches FROM rt_index WHERE optionalMatches = 1 AND MATCH('#requireCol requiredVal')
I can see a potential way to do this with CRC32 string conversions and MVA attributes but these aren't supported with RT Indexes and I REALLY would prefer not switch from them.
One way would be to simply convert all your columns to normal fields. Then you can put all this logic inside the MATCH(..). Ie not using attributes.
Yes you can only have one MATCH per query.
Otherwise, yes you could use the CRC trick to make string attributes into integer ones, so can use for filtering.
Not sure why you would need MVA, but they are now supported in RT indexes in 2.0.2