How to query a big object in soql?
For SOQL queries with big objects, you have to build your query starting from the first field defined in the index, without skipping any fields between the first and last field in the query. So for example, if your index defines three fields, you can’t create a query using only the first and third fields.
What are the pros and cons of ObjectDB?
ObjectDB includes all basic data types in Java, user-defined classes, and standard Java collections. Every object has a unique ID. The number of elements is limited only by the maximum database size (128 TB). ObjectDB is available cross-platform and the benchmark performance is exceptional.
What are custom fields and standard fields in Salesforce?
Fields you create on standard or custom objects are called custom fields. You can create a custom field on the Contact object to store your contacts’ birthdays. Identity, system, and name fields are standard on every object in Salesforce. Each standard object also comes with a set of prebuilt, standard fields.
How are objects used in an object oriented database?
1 Objects are the basic building block and an instance of a class, where the type is either built-in or user-defined. 2 Classes provide a schema or blueprint for objects, defining the behavior. 3 Methods determine the behavior of a class. 4 Pointers help access elements of an object database and establish relations between objects.
How are non clustered indexes used in querying?
Searching Indexes. After your non-clustered indexes are created you can begin querying with them. Indexes use an optimal search method known as binary search. Binary searches work by constantly cutting the data in half and checking if the entry you are searching for comes before or after the entry in the middle of the current portion of data.
What happens when you add an index to a database?
Adding an index will always mean storing more data Adding an index will increase how long it takes your database to fully update after a write operation. If adding an index does not decrease query time, you can simply remove it from the database. To remove an index use the DROP INDEX command:
Is the = operator valid for big objects?
Any prior fields in your query can only use the = operator. The !=, LIKE, NOT IN, EXCLUDES, and INCLUDES operators aren’t valid in any query involving big objects. The following queries assume that you have a big object in which the index is defined by Account__c, Game_Platform__c, and Play_Date__c.