I'm facing some issues when trying to bind a list variable in an ArangoDB query. More concretely, the list might look like as follows and comes from a URL parameter in a certain Foxx controller endpoint:
.../someAPIEndpoint?list=A,B,C,D
I would like to be able to do something like this:
stmt = db._createStatement({query: "for i in [#list] return i"});
stmt.bind('list', req.params('list').split(','));
Since I do not know how many values will I receive from the API call, I can't create n bindings for each possible one. Is what I want to achieve even possible?
Thanks in advance.
you were almost there, you can bind an array directly to the parameter (i just removed "[" and "]" from your query:
stmt = db._createStatement({query: "for i in #list return i"});
stmt.bind('list', req.params('list').split(','));
Related
I haven't used logic apps a lot, my boss is having trouble stuffing the results of one query into a variable and then using that variable in another query.
Basically, all he wants to do is get a list of of Id's returned from the first query and use that list in the second.
Here is a picture of what his logic app looks like:
You can see at the end of the second query he wants to check if the id is in the list or not. He's out for the day and I'm not sure if that variable is even receiving the list of id's successfully, but is there anything from the picture that you can tell that needs to be corrected? Or any suggestions that he could try, to achieve what he's trying to achieve?
According to the image, no data is getting stored into the variable AppId. While in the query you can just directly use c.EntityId. Below query to check if c.id is present in c.EntityId.
SELECT c.Vechicle.GrossVechicleWeight as GVW, c.EntityId as ApplicationId FROM c where c.RiskTypeId = 1 and c.Discriminator = 'RiskEntity' and c.EntityTypeId = 4500 and c.id in (c.EntityId)
Consider if you are trying to store c.Entity into AppId variable then you can Query SELECT c.EntityId FROM c and then store the result into the variable using Append to array variable action by extracting only c.EntityId using Parse JSON.
Here is my logic app
RESULT:
I'm currently writing an app that accesses google bigquery via their "#google-cloud/bigquery": "^2.0.6" library. In one of my queries I have a where clause where i need to pass a list of ids. If I use UNNEST like in their example and pass an array of strings, it works fine.
https://cloud.google.com/bigquery/docs/parameterized-queries
However, I have found that UNNEST can be really slow and just want to use IN on its own and pass in a string list of ids. No matter what format of string list I send, the query returns null results. I think this is because of the way they convert parameters in order to avoid sql injection. I have to use a parameter because I, myself want to avoid SQL injection attacks on my app. If i pass just one id it works fine, but if i pass a list it blows up so I figure it has something to do with formatting, but I know my format is correct in terms of what IN would normally expect i.e. IN ('', '')
Has anyone been able to just pass a param to IN and have it work? i.e. IN (#idParam)?
We declare params like this at the beginning of the script:
DECLARE var_country_ids ARRAY<INT64> DEFAULT [1,2,3];
and use like this:
WHERE if(var_country_ids is not null,p.country_id IN UNNEST(var_country_ids),true) AND ...
as you see we let NULL and array notation as well. We don't see issues with speed.
I am working with Google Cloud Datastore using the latest google.cloud.ndb library
I am trying to implement pagination use Cursor using the following code.
The same is not fetching the data correctly.
[1] To Fetch Data:
query_01 = MyModel.query()
f = query_01.fetch_page_async(limit=5)
This code works fine and fetches 5 entities from MyModel
I want to implementation pagination that can be integrated with a Web frontend
[2] To Fetch Next Set of Data
from google.cloud.ndb._datastore_query import Cursor
nextpage_value = "2"
nextcursor = Cursor(cursor=nextpage_value.encode()) # Converts to bytes
query_01 = MyModel.query()
f = query_01.fetch_page_async(limit=5, start_cursor= nextcursor)
[3] To Fetch Previous Set of Data
previouspage_value = "1"
prevcursor = Cursor(cursor=previouspage_value.encode())
query_01 = MyModel.query()
f = query_01.fetch_page_async(limit=5, start_cursor=prevcursor)
The [2] & [3] sets of code do not fetch paginated data, but returns results same as results of codebase [1].
Please note I'm working with Python 3 and using the
latest "google.cloud.ndb" Client library to interact with Datastore
I have referred to the following link https://github.com/googleapis/python-ndb
I am new to Google Cloud, and appreciate all the help I can get.
Firstly, it seems to me like you are expecting to use the wrong kind of pagination. You are trying to use numeric values, whereas the datastore cursor is providing cursor-based pagination.
Instead of passing in byte-encoded integer values (like 1 or 2), the datastore is expecting tokens that look similar to this: 'CjsSNWoIb3Z5LXRlc3RyKQsSBFVzZXIYgICAgICAgAoMCxIIQ3ljbGVEYXkiCjIwMjAtMTAtMTYMGAAgAA=='
Such a cursor you can obtain from the first call to the fetch_page() method, which returns a tuple:
(results, cursor, more) where results is a list of query results, cursor is a cursor pointing just after the last result returned, and more indicates whether there are (likely) more results after that
Secondly, you should be using fetch_page() instead of fetch_page_async(), since the second method does not return you the cursors you need for pagination. Internally, fetch_page() is calling fetch_page_async() to get your query results.
Thirdly and lastly, I am not entirely sure whether the "previous page" use-case is doable using the datastore-provided pagination. It may be that you need to implement that yourself manually, by storing some of the cursors.
I hope that helps and good luck!
I've read through every stack overflow I can find and I don't understand why this still isn't working.
I'm trying to construct a NodeJS Mongo find query and very simply want to use a variable as the values, the key does not need to be dynamic.
This is the code I was working with initially :
collection.find({project_id : project_id_val})
but this simply returns :
Found the following records
[]
I've also tried constructing my own javascript object and passing that in e.g.
Query = {}
Query["project id"] = project_id_val
collection.find(query)
But that doesn't work either, I know the key/value pair is correct because
project_id: "12345" works absolutely fine, and returns exactly what I want it to. I feel like this should be very simple so if someone could let me know where I'm going wrong that would be great.
Thanks.
I have a query where I need to do a "Where" clause for two different columns in two different tables but subsonic creates the same parametrized parameter name for both which is causing an issue. How can I fix this?
string _RawSql = new Select()
.From(Tables.Table1)
.InnerJoin(Tables.Table2)
.InnerJoin(Table3.SidColumn, Table2.Table3SidColumn)
.Where(Table1.SidColumn).IsEqualTo(2)
.And(Table3.SidColumn).IsEqualTo(1)
.BuildSqlStatement();
The query this is creating is
SELECT ....
FROM [dbo].[Table1]
INNER JOIN [dbo].[Table2] ON [dbo].[Table1].[Table2Sid] = [dbo].[Table2].[Sid]
INNER JOIN [dbo].[Table3] ON [dbo].[Table2].[Table3Sid] = [dbo].[Table3].[Sid]
WHERE [dbo].[Table1].[Sid] = #Sid
AND [dbo].[Table3].[Sid] = #Sid
Note that in the last two lines its using #Sid for both Table1 and Table3. How go I do it so it uses #Sid0 and #Sid1?
Any help would be appreciated. Thanks
Thanks for the response, I really appreciate it. I am using 2.1
I am already using TableColumn. Below is the c# subsonic code...
.Where(Table1.SidColumn).IsEqualTo(2)
.And(Table3.SidColumn).IsEqualTo(1)
which creates the following sql when viewed in sql profiler
WHERE [dbo].[Table1].[Sid] = #Sid
AND [dbo].[Table3].[Sid] = #Sid
Could you please show me how can I replace these lines with the way you are suggesting? I would really rather not use literal "Table2.Sid = 2"
ranmore, the issue is same with variables or with constants.
I have even tried
.Where("Table1.Sid").IsEqualTo(2)
.And("Table3.Sid").IsEqualTo(1)
This creates the query as
WHERE Table1.Sid = #Table1.Sid0
AND Table3.Sid = #Table3.Sid1
I finally get different parametrized vars in this case but now SQL Server complains because it does not like . in the parametrized var names.
I have no clue how to perform a join with 2 where clauses for 2 different tables!
What version are you using? In 2.2 You can use the TableColumn object to get around this (it may be the same for 2.1 as well. So instead of using the struct, as you're doing, you can use the object (Table2.SidColumn).
If push comes to shove - you can override everything with a string - so in your case you could use "Table1.Sid" and "Table2.Sid" right in the Where() method.
I haven't been able to confirm this, but perhaps the problem only happens with literals? (not sure if your sample code is like that for brevity's sake)
int table1SidColumnValue = 2;
int table3SidColumnValue = 1;
.Where(Table1.SidColumn).IsEqualTo(table1SidColumnValue)
.And(Table3.SidColumn).IsEqualTo(table2SidColumnValue)
I remember seeing a problem with this when using multiple .In() clauses with literal values, not sure if that applies to your problem though.
I'm not sure what version of the code I have but your query produces numbered parameters for me.
If you look at Line 255 of ANSISqlGenerator.cs
https://github.com/subsonic/SubSonic-2.0/blob/master/SubSonic/SqlQuery/SqlGenerators/ANSISqlGenerator.cs
c.ParameterName = String.Concat(col.ParameterName, query.Constraints.IndexOf(c));
The where parameters really should have numbers appended to them... maybe pull the latest version?