Class DatabaseQueryContext

java.lang.Object
com.mckoi.database.AbstractQueryContext
com.mckoi.database.DatabaseQueryContext
All Implemented Interfaces:
QueryContext

public class DatabaseQueryContext extends AbstractQueryContext
An implementation of a QueryContext based on a DatabaseConnection object.
Author:
Tobias Downer
  • Constructor Details

    • DatabaseQueryContext

      public DatabaseQueryContext(DatabaseConnection database)
      Constructs the QueryContext.
  • Method Details

    • getDatabase

      public Database getDatabase()
      Returns the Database object that this context is a child of.
    • getSystem

      public TransactionSystem getSystem()
      Returns a TransactionSystem object that is used to determine information about the transactional system.
    • getFunctionLookup

      public FunctionLookup getFunctionLookup()
      Returns the system FunctionLookup object.
    • getGrantManager

      public GrantManager getGrantManager()
      Returns the GrantManager object that is used to determine grant information for the database.
    • getTable

      public DataTable getTable(TableName name)
      Returns a DataTable from the database with the given table name.
    • getDataTableDef

      public DataTableDef getDataTableDef(TableName name)
      Returns a DataTableDef for the given table name.
    • createViewQueryPlanNode

      public QueryPlanNode createViewQueryPlanNode(TableName name)
      Creates a QueryPlanNode for the view with the given name.
    • nextSequenceValue

      public long nextSequenceValue(String name)
      Increments the sequence generator and returns the next unique key.
    • currentSequenceValue

      public long currentSequenceValue(String name)
      Returns the current sequence value returned for the given sequence generator within the connection defined by this context. If a value was not returned for this connection then a statement exception is generated.
    • setSequenceValue

      public void setSequenceValue(String name, long value)
      Sets the current sequence value for the given sequence generator.
    • getUserName

      public String getUserName()
      Returns the user name of the connection.