In summary SQL/SOQL injection involves taking user-supplied input and using those values in a dynamic SOQL query. If the input is not validated, it can include SOQL commands that effectively modify the SOQL statement and trick the application into performing unintended commands.
How do I fix SOQL injection in Salesforce?
The first and most recommended method to prevent SOQL injection is to use static queries with bind variables. Consider the following query. This step ensures that the user input is treated as a variable, not as an executable element of the query.
How do I fix so many SOQL errors?
Resolve the “Too many SOQL queries: 101” error
To fix the issue, change your code so that the number of SOQL fired is less than 100. If you need to change the context, you can use @future annotation which will run the code asynchronously.
Why does Salesforce use SOQL?
We can use SOQL to search for the organization’s Salesforce data for some specific information. Both SQL and SOQL allow you to specify a source object by using the SELECT statement. Additionally, Salesforce SQL uses filters along with the SELECT clause to return an optional set of data.
What does SOQL return?
A SOQL query will always return a list of sobjects. If you are assigning a query to a single sobject Apex will execute your query then attempt to assign to this sobject (unfortunately, if there are no elements in the returned query or more than the one you will get an exception).
What are dynamic SOQL queries and how do you prevent SOQL injection in dynamic SOQL queries?
To prevent SOQL injection, use the escapeSingleQuotes method. This method adds the escape character (\) to all single quotation marks in a string that is passed in from a user. The method ensures that all single quotation marks are treated as enclosing strings, instead of database commands.
What is database query in Salesforce?
query in Salesforce allows you to make a dynamic SOQL query at runtime. You can build up a string and then use that as a query string at run time in the database. query statement to make a SOQL call that is determined at run time. In Batch Apex, if you use Database.
What is too many SOQL queries?
“System. LimitException: Too many SOQL queries: 101” errors occur when you exceed SOQL queries governor limit. The Actual limit is “you can run up to a total 100 SOQL queries in a single call or context”.
What are Salesforce errors?
When a user does something that triggers a process, such as create a record, and the process fails, the user gets an error message. The error message includes the process name, error ID, and sometimes technical information that the user can give to you, the Salesforce admin.
What is 101 SOQL error in Salesforce?
In simple terms, the error message system limit exception too many soql queries 101 means that a single apex transaction has issued more than 100 SOQL queries.
What data types is a SOQL query return?
SOQL can only return a single record, a list of records, or an Integer (if a COUNT method is used).
What three data types can be returned from a SOQL statement?
In Salesforce SOQL query returns following data types:
- Single sObject.
- List of sObjects.
What are the possible data types that a SOQL query can return?
When used in Apex code, a SOQL query can return three type of result: a list of sObjects, a single sObject, or of Aggregate Results.
What are the types of SOQL statements in Salesforce?
There are 2 types of SOQL Statements: Static SOQL. Dynamic SOQL.
What is a method in Salesforce?
A Method is a collection of statements that are grouped together to perform an operation.
Which method return type returns a value in Salesforce?
When the method return type is void , the method does not return a value. To return a value, replace void with a different return type. For example, here, the wilt method expects a return (response) value that’s an integer.
What is Apex classes in Salesforce?
An Apex class is a template or blueprint from which Apex objects are created. Classes consist of other classes, user-defined methods, variables, exception types, and static initialization code.
What is an apex object?
Apex is a strongly typed, object-oriented programming language that allows developers to execute flow and transaction control statements on Salesforce servers in conjunction with calls to the API.
What is wrapper class in Salesforce?
What is Wrapper Class in Salesforce? A wrapper class is nothing but a collection of different Salesforce data types. In Salesforce, you can combine multiple data types and utilize them for various purposes. For example, there is a wrapper class that can access the account records and displays an in-page block table.
What is asynchronous apex in Salesforce?
In a nutshell, asynchronous Apex is used to run processes in a separate thread, at a later time. An asynchronous process is a process or function that executes a task “in the background” without the user having to wait for the task to finish.
Why use triggers in Salesforce?
As you can see, the primary role of triggers is to automate your data management and workflow in Salesforce. Triggers enable you to perform custom actions (for example, update an account) before or after changes to Salesforce records.
What is ViewState in Salesforce?
View state holds the state of Visual force page. The view state of a web page is composed of all the data that’s necessary to maintain the state of the controller during server requests (like sending or receiving data).
What is ReRender in Salesforce?
ReRender is used to refresh a particular section of the visual force page. We have to just mention the id of the page section (in the ReRender attribute) that needs to be refreshed. In the following example Clicking of the command button “Refresh Lower Page Block” refreshes the lower page block.
What is heap size limit in Salesforce?
Salesforce enforces an Apex Heap Size Limit of 6MB for synchronous transactions and 12MB for asynchronous transactions. The “Apex heap size too large” error occurs when too much data is being stored in memory during processing.
What is transient variable in Salesforce?
The value of transient variable is only transferred from controller to visualforce page but not as part of view state. As the value is not part of view state, the changed value of that variable is not transferred back from visualforce page to controller when a new request is made by clicking a button or link.
What is difference between transient and static?
The main difference between the two ( static versus transient ) is that static variables exist only once per transaction, but transient variables can exist many times. In other words, static variables have a global scope, while transient variables have a local scope.
What is Apex sharing in Salesforce?
Apex managed sharing enables developers to programmatically manipulate sharing to support their application’s behavior through Apex or the SOAP API. This type of sharing is similar to Force.com managed sharing. Only users with “Modify All Data” permission can add or change Apex managed sharing on a record.