I am using the following two options, the Mongo C# driver seems to be taking more time. I'm using StopWatch to calculate the timings.
Case 1: Native Mongo QueryDocument (takes 0.0011 ms to return data)
string querytext = #"{schemas:{$elemMatch:{name: " + n + ",code : " + c + "} }},{schemas:{$elemMatch:{code :" + c1 + "}}}";
string printQueryname = "Query: " + querytext;
BsonDocument query1 = MongoDB.Bson.Serialization.BsonSerializer.Deserialize<BsonDocument>(querytext);
QueryDocument queryDoc1 = new QueryDocument(query1);
var queryResponse = collection.FindAs<BsonDocument>(queryDoc1);
Case 2: Mongo C# Driver (takes more than 3.2 ms to return data)
Schema _result = new Schema();
_result = (from c in _coll.AsQueryable<Schema>()
where c.schemas.Any(s => s.code.Equals(c) && s.name.Equals(n) ) &&
c.schemas.Any(s => s.code.Equals(c1))
select c).FirstOrDefault();
Any thoughts ? Anything wrong here ?
Related
Hello I'm trying to read tables related with ManyToOne , i get the result when i execute the query in Navicat :
but when i try to display data in the front with angular i failed i get only the main tables
this is the query :
//like this
#Query(value = "SELECT\n" +
"\tnotification.idnotif,\n" +
"\tnotification.message,\n" +
"\tnotification.\"state\",\n" +
"\tnotification.title,\n" +
"\tnotification.\"customData\",\n" +
"\tnotification.\"date\",\n" +
"\tnotification.receiver,\n" +
"\tnotification.sender,\n" +
"\tnotification.\"type\",\n" +
"\thospital.\"name\",\n" +
"\thospital.\"siretNumber\",\n" +
"\tusers.firstname,\n" +
"\tusers.\"isActive\" \n" +
"FROM\n" +
"\tnotification\n" +
"\tINNER JOIN hospital ON notification.receiver = :reciver\n" +
"\tINNER JOIN users ON notification.sender = :sender",nativeQuery = true)
List<Notification> findNotificationCustomQuery(#Param("reciver") Long reciver,#Param("sender") Long sender);
please what can i do to resolve this problem !
You are doing inner join in the native query. Follow as below. Change the return type to Object[] from Notification.
#Query(value = "SELECT\n" +
"\tnotification.idnotif,\n" +
"\tnotification.message,\n" +
"\tnotification.\"state\",\n" +
"\tnotification.title,\n" +
"\tnotification.\"customData\",\n" +
"\tnotification.\"date\",\n" +
"\tnotification.receiver,\n" +
"\tnotification.sender,\n" +
"\tnotification.\"type\",\n" +
"\thospital.\"name\",\n" +
"\thospital.\"siretNumber\",\n" +
"\tusers.firstname,\n" +
"\tusers.\"isActive\" \n" +
"FROM\n" +
"\tnotification\n" +
"\tINNER JOIN hospital ON notification.receiver = :reciver\n" +
"\tINNER JOIN users ON notification.sender =
:sender",nativeQuery = true)
List<Object []> findNotificationCustomQuery(#Param("reciver")
Long reciver,#Param("sender") Long sender);
Then you have to loop the result as below and get the attributes.
for(Object[] obj : result){
String is = obj[0];
//Get like above
}
I have the following code that executes a SQL statement and looks for a result.
var sql = #"select BOQ_IMPORT_ID "
+ "from ITIS_PRJ.PRJ_BOQ_IMPORT_HEADER "
+ "where PROJECT_ID = :Projectid "
+ "order by CREATED_ON desc "
+ "fetch first 1 row only";
using (var conn = new OracleConnection(ApplicationSettings.ConnectionString))
using (var cmd = new OracleCommand(sql, conn))
{
conn.Open();
cmd.Parameters.Add(LocalCreateParameterRaw("ProjectId", projectId));
var reader = cmd.ExecuteReader();
if (reader.Read())
{
byte[] buffer = new byte[16];
reader.GetBytes(0, 0, buffer, 0, 16);
var boqId = new Guid(buffer);
return boqId;
}
return null;
}
Where LocalCreateParameterRaw is declared as:
public static OracleParameter LocalCreateParameterRaw(string name, object value)
{
OracleParameter oracleParameter = new OracleParameter();
oracleParameter.ParameterName = name;
oracleParameter.OracleDbType = OracleDbType.Raw;
oracleParameter.Size = 16;
oracleParameter.Value = value;
return oracleParameter;
}
The underlying type for 'projectId' is 'Guid'.
The if (reader.Read()) always evaluates to false, despite there being exactly one row in the table. It normally should return only one row.
Using GI Oracle Profiler I can catch the SQL sent to the db, but only once did the profiler provide a value for the :ProjectId parameter, and it was in lower case. Like that it returned no results, but as soon as I applied UPPER to that value, I get a result.
It looks like I somehow have to get my parameter into uppercase for the query to work, but I have no idea how. Yet if I do a ToString().ToUpper() on the projectId GUID, I get a parameter binding error.
VERY IMPORTANT:
I have tried removing the where clause altogether, and no longer add a parameter, so all rows in the table should be returned, yet still no results.
I don't know how, but making the SQL string a verbatim string (prefixed with #) causes the proc to work. So, it doesn't work with:
var sql = #"SELECT BOQ_IMPORT_ID "
+ "FROM ITIS_PRJ.PRJ_BOQ_IMPORT_HEADER "
+ "WHERE PROJECT_ID = :projectid "
+ "ORDER BY CREATED_ON DESC "
+ "FETCH FIRST ROW ONLY";
Yet the same command string in SQL Developer executes and returns results. When I make my SQL string verbatim, as below, I get results.
var sql = #"select BOQ_IMPORT_ID
from ITIS_PRJ.PRJ_BOQ_IMPORT_HEADER
where PROJECT_ID = :ProjectId
order by CREATED_ON desc
fetch first 1 row only";
Using a more general approach, try the following
var sql = "SELECT BOQ_IMPORT_ID "
+ "FROM ITIS_PRJ.PRJ_BOQ_IMPORT_HEADER "
+ "WHERE PROJECT_ID = :projectid "
+ "ORDER BY CREATED_ON DESC "
+ "FETCH FIRST ROW ONLY";
using (DbConnection conn = new OracleConnection(ApplicationSettings.ConnectionString))
using (DbCommand cmd = conn.CreateCommand()) {
DbParameter parameter = cmd.CreateParameter();
parameter.ParameterName = "projectid";
parameter.Value = projectId.ToString("N").ToUpper(); //<-- NOTE FORMAT USED
cmd.Parameters.Add(parameter);
cmd.CommandType = CommandType.Text;
cmd.CommandText = sql;
conn.Open();
var reader = cmd.ExecuteReader();
if (reader.Read()) {
var boqId = new Guid((byte[])reader[0]);
return boqId;
}
return null;
}
It looks like I somehow have to get my parameter into uppercase for the query to work, but I have no idea how. Yet if I do a ToString().ToUpper() on the projectId GUID, I get a parameter binding error.
Reference Guid.ToString Method
Specifier N formats it to 32 digits: 00000000000000000000000000000000
When no format is provided the default format is D which would include 32 digits separated by hyphens.
00000000-0000-0000-0000-000000000000
That would explain your binding error.
I am trying to use Bing Custom Search's API for documents from Cognitive Services. The strange thing is that when I run it from India, it gives me more than a thousand results, but when I run it from a US server, it returns only 25 (sometimes 50 results). Here is the sample code for that:
var totalCount = 0;
var filetypes = new List<string> { "pdf", "docx", "doc" };
foreach (var filetype in filetypes)
{
var searchTerm = "microsoft%20.net%20resume+filetype%3a" + filetype;
Console.WriteLine("Searching for : " + filetype);
for (var i = 0; i < 40; i++)
{
var nextCount = 0;
var url = "https://api.cognitive.microsoft.com/bingcustomsearch/v7.0/search?" +
"q=" + searchTerm +
"&customconfig=" + customConfigId +
"&count=25" + "&offset=" + ((i * 25) + nextCount);
using (var client = new HttpClient())
{
client.DefaultRequestHeaders.Add("Ocp-Apim-Subscription-Key", subscriptionKey);
var httpResponseMessage = client.GetAsync(url).Result;
var responseContent = httpResponseMessage.Content.ReadAsStringAsync().Result;
BingCustomSearchResponse response =
JsonConvert.DeserializeObject<BingCustomSearchResponse>(responseContent);
if (response.webPages == null || response.webPages.value.Length <= 0)
{
Console.WriteLine("response.webPages is null ");
break;
}
foreach (var webPage in response.webPages.value)
{
Console.WriteLine("name: " + webPage.name);
Console.WriteLine("url: " + webPage.url);
Console.WriteLine("displayUrl: " + webPage.displayUrl);
Console.WriteLine("snippet: " + webPage.snippet);
Console.WriteLine("dateLastCrawled: " + webPage.dateLastCrawled);
Console.WriteLine();
}
totalCount = totalCount + response.webPages.value.Length;
}
}
}
The subscription key I am using is a trial key.
I got the reason of this behavior. Actually it had nothing to do with region/country/market.
After looking into the response i got this message.
"Rate limit is exceeded. Try again in 1 seconds"
It means for after each call in the loop i have to wait for 1 second to give next call. Now need to know is this limit for trial subscription or this is kept for all calls to prevent DDOS attack or something.
May be from India it was working because may one iteraction is already taking one or more second.
Two things you can try: 1) In searchTerm, no need to use %20 and %3a, just use punctuations as you type in Bing, e.g. var searchTerm = "microsoft.net resume filetype::"+filetype, and 2) Enforce market by appending mkt=en-in (for India) or en-us (for US) in the query. You can do this by appending +"&mkt=en-in" at the end of url.
I presume for custom search you have selected domains (for both en-in and en-us markets) that return thousands of results for this query.
I am trying to do the following with a IQueryable expression:
(from Person p in s
select new
{
label = p.FirstName + " "
+ (string.IsNullOrWhiteSpace(p.MiddleName) ? p.MiddleName + " " : "")
+ p.LastName,
value = p.Id
}).ToList();
I am getting following error:
LINQ to Entities does not recognize the method 'Boolean
IsNullOrWhiteSpace(System.String)' method, and this method cannot be
translated into a store expression.
What is the solution for this?
String.IsNullOrWhitespace is a static function of the string object and cannot be used with Entity Framework queries, whereas p.FirstName.StartsWith("S") is a method of the entity property and can be used.
To answer your question you will have to roll your own inline. Try this:
(from Person p in s
select new
{
label = p.FirstName + " "
+ ((p.MiddleName != null && p.MiddleName != string.Empty) ? p.MiddleName + " " : "")
+ p.LastName,
value = p.Id
}).ToList();
I've a use case where I need to create a rule dynamically for a single time use only. The rules are dynamic and in the worse case can be different for each iteration/request. Hence, I cannot store them.
My current understanding of Drools is that you need to create a KnowledgeBuilder and then add the rules.
I'm creating the KnowledgeBase as follows.
private KnowledgeBase readKnowledgeBase() throws Exception {
long t1 = System.currentTimeMillis();
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
long t11 = System.currentTimeMillis();
kbuilder.add( org.drools.io.ResourceFactory.newByteArrayResource(getRule()), ResourceType.DRL);
long t2 = System.currentTimeMillis();
KnowledgeBuilderErrors errors = kbuilder.getErrors();
if (errors.size() > 0) {
for (KnowledgeBuilderError error: errors) {
System.err.println(error);
}
throw new IllegalArgumentException("Could not parse knowledge.");
}
long t3 = System.currentTimeMillis();
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
long t4 = System.currentTimeMillis();
kbase.addKnowledgePackages(kbuilder.getKnowledgePackages());
long t5 = System.currentTimeMillis();
Collection<KnowledgePackage> kpackages = kbase.getKnowledgePackages();
for (KnowledgePackage knowledgePackage : kpackages) {
System.out.println("Package -------- " + knowledgePackage.getName());
Collection<Rule> rules = knowledgePackage.getRules();
for (Rule rule : rules) {
System.out.println("****" + rule.getName());
}
}
long t6 = System.currentTimeMillis();
System.out.println( (t11-t1) + " " + (t2-t11) + " " + ( t3-t2) + " " + ( t4-t3) + " " + ( t5-t4) + " " + ( t6-t5)+ " " );
return kbase;
}
Based on the timing logs the code take majority (more than 80%) of time in only these two operations. Is there a way to make it faster? OR is there a way of achieving my use case ?
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add( org.drools.io.ResourceFactory.newByteArrayResource(getRule()), ResourceType.DRL);
The following call will actually compile your code, i.e., it calls the JDT java compiler:
kbuilder.add( org.drools.io.ResourceFactory.newByteArrayResource(getRule()), ResourceType.DRL);
There is no way of avoiding that unless you use internal APIs, that are in fact very complicated to use.
There is an intermediate step that is to generate the canonical model using the descriptor builder API. It will save you a few cycles, but not much as the heaviest operation is the java compilation. Examples of the use of the Descr Builder API:
https://github.com/droolsjbpm/drools/blob/master/drools-compiler/src/test/java/org/drools/lang/api/DescrBuilderTest.java