Interface VTIEnvironment

All Known Implementing Classes:
FromVTI, VTIResultSet

public interface VTIEnvironment

VTIEnvironment is the state variable created by the optimizer to help it place a Table Function in the join order. The methods of VTICosting use this state variable in order to pass information to each other and learn other details of the operating environment.

See Also:
  • Method Summary

    Modifier and Type
    Method
    Description
    Return the SQL text of the original SQL statement.
    Get an object associated with a key from set of objects maintained with the statement plan.
    int
    Get the specific JDBC isolation of the statement.
    boolean
    Return true if this instance of the Table Function has been created for compilation, false if it is for runtime execution.
    void
    Saves an object associated with a key that will be maintained for the lifetime of the statement plan.
  • Method Details

    • isCompileTime

      boolean isCompileTime()
      Return true if this instance of the Table Function has been created for compilation, false if it is for runtime execution.
    • getOriginalSQL

      String getOriginalSQL()
      Return the SQL text of the original SQL statement.
    • getStatementIsolationLevel

      int getStatementIsolationLevel()
      Get the specific JDBC isolation of the statement. If it returns Connection.TRANSACTION_NONE then no isolation was specified and the connection's isolation level is implied.
    • setSharedState

      void setSharedState(String key, Serializable value)
      Saves an object associated with a key that will be maintained for the lifetime of the statement plan. Any previous value associated with the key is discarded. Any saved object can be seen by any JDBC Connection that has a Statement object that references the same statement plan.
    • getSharedState

      Object getSharedState(String key)
      Get an object associated with a key from set of objects maintained with the statement plan.