DbReader | fast database reader for the .Net framework | Object-Relational Mapping library
kandi X-RAY | DbReader Summary
kandi X-RAY | DbReader Summary
DbReader is first and foremost NOT an ORM. DbReader simply maps rows into classes. These classes are nothing but representation of the rows returned by the query in the context of .Net. They are not entities, not business objects, they are just rows represented as .Net objects. No Magic.
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QUESTION
i am having trouble pulling from two different private repos. I followed the instructions around here and created a deploy key in my github private repo. I have two private repos of the form:
...ANSWER
Answered 2022-Apr-03 at 00:47Your ~/.ssh/config file should be:
QUESTION
IDbConnection dbConnection = new SqliteConnection(GetDBFilePath())
dbConnection.Open();
IDbCommand dbCommand = dbConnection.CreateCommand();
dbCommand.CommandText = "select count(*) from dataTable";
IDataReader dbReader = dbCommand.ExecuteReader();
dbReader.Read();
ANSWER
Answered 2021-Dec-29 at 05:36Sqlite is a kind of "In-memory databases", so your android device memory size may limit the db size you can read.
According to Limits In SQLite ,
The default setting for SQLITE_MAX_COLUMN is 2000. You can change it at compile time to values as large as 32767. On the other hand, many experienced database designers will argue that a well-normalized database will never need more than 100 columns in a table.
you should not save huge data in single table.
QUESTION
I just started using typeorm and ran into a major issue. Neither conection.sychronize() nor repository.save(foo) actually save changes to the database file. More precisly what is happening is that during runtine i can synchronize my db, save and read entities just fine. However when I close my program an run it again the db is empty. Not even the tables are present.
My entities
...ANSWER
Answered 2021-Dec-14 at 17:56You need to set autoSave connection property to true
So you init the connection as following:
QUESTION
I have a custom DbDataReader in my application, which overrides GetDateTime method to change DateTimeKind.
...ANSWER
Answered 2021-Sep-23 at 11:04The TableName property will always return "SchemaTable", because there's no other meaningful name it can return.
As per the link you found, the table name for each column should be returned in the BaseTableName column of the schema table. But this will only be returned if the CommandBehavior.KeyInfo flag is specified.
Digging through the source code, it looks like you'll need to use the ReaderExecuting method and take over responsibility for executing the command in order to do that:
QUESTION
I'm working on a project in C# that converts a database table to an XML-file with base64 encoded contents. Please bear with me, because C# is not my day-to-day programming language.
The code I've managed to come up with is this:
...ANSWER
Answered 2021-Sep-14 at 17:51The key is always not to write formatting of text formats yourself be it HTML, JSON, XML, YAML, or anything else. This is just asking for hard-to-find bugs and injections since you do not have control of the data or table names. For example, what happens if your data contains !, <, or >?
C# has numerous built-in XML tools and so does SQL where the formatting is done for you. Which one to use would depend on your other requirements or preferences.
QUESTION
I wonder if anyone can shed any light on why I'm not getting data in this piece of code:
...ANSWER
Answered 2021-Aug-24 at 16:39You are using a Public connection object, which as the comments state isn't the way to go. But most importantly, note that only one SqlDataReader can be associated with one SqlConnection, compounding the issue of a single shared connection.
Only one SqlDataReader per associated SqlConnection may be open at a time, and any attempt to open another will fail until the first one is closed. Similarly, while the SqlDataReader is being used, the associated SqlConnection is busy serving it until you call Close.
It's probable that you already have an open Reader, and that is why you are seeing results for another data set.
QUESTION
For my class "WindowsFormsApp1", I'm running into a problem which occurs when trying to access my "DBAccess" class.
...ANSWER
Answered 2021-Jun-20 at 16:55Add using WindowsFormsApp1.DatabaseProject; to SignIn class
QUESTION
I am trying to write a line-by-line csv to a Azure Blob with Spring Batch.
Autowiring the Azure Storage:
...ANSWER
Answered 2021-Apr-12 at 17:55The FlatFileItemWriter requires a org.springframework.core.io.Resource to write data. If the API you use does not implement this interface, it is not usable with the FlatFileItemWriter. You need to provide a Resource implementation for Azure or look for an library that implements it, like the Azure Spring Boot Starter Storage client library for Java.
QUESTION
I'm writing a Spring Boot application that starts up, gathers and converts millions of database entries into a new streamlined JSON format, and then sends them all to a GCP PubSub topic. I'm attempting to use Spring Batch for this, but I'm running into trouble implementing fault tolerance for my process. The database is rife with data quality issues, and sometimes my conversions to JSON will fail. When failures occur, I don't want the job to immediately quit, I want it to continue processing as many records as it can and, before completion, to report which exact records failed so that I, and or my team, can examine these problematic database entries.
To achieve this, I've attempted to use Spring Batch's SkipListener interface. But I'm also using an AsyncItemProcessor and an AsyncItemWriter in my process, and even though the exceptions are occurring during the processing, the SkipListener's onSkipInWrite() method is catching them - rather than the onSkipInProcess() method. And unfortunately, the onSkipInWrite() method doesn't have access to the original database entity, so I can't store its ID in my list of problematic DB entries.
Have I misconfigured something? Is there any other way to gain access to the objects from the reader that failed the processing step of an AsynItemProcessor?
Here's what I've tried...
I have a singleton Spring Component where I store how many DB entries I've successfully processed along with up to 20 problematic database entries.
...ANSWER
Answered 2020-May-29 at 11:12This is because the future wrapped by the AsyncItemProcessor is only unwrapped in the AsyncItemWriter, so any exception that might occur at that time is seen as a write exception instead of a processing exception. That's why onSkipInWrite is called instead of onSkipInProcess.
This is actually a known limitation of this pattern which is documented in the Javadoc of the AsyncItemProcessor, here is an excerpt:
QUESTION
I use geoip2 to determine the country by ip. During development and testing of the code, I have no problems, but when I run the compiled archive, I encounter a java.io.FileNotFoundException exception. I understand that this is because the path to the file is absolute, and in the archive it changes. Question: How do I need to change my code so that even from the archive I can access the file?
...ANSWER
Answered 2020-Apr-29 at 19:19You can try this
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