Class Explain

java.lang.Object
org.h2.command.Prepared
org.h2.command.dml.Explain
public class Explain extends Prepared
This class represents the statement EXPLAIN

  • Field Details

    • command

      private Prepared command

    • result

      private LocalResult result

    • executeCommand

      private boolean executeCommand

  • Constructor Details

  • Method Details

    • setCommand

      public void setCommand(Prepared command)

    • getCommand

      public Prepared getCommand()

    • prepare

      public void prepare()
      Description copied from class: Prepared
      Prepare this statement.
      Overrides:
      prepare in class Prepared

    • setExecuteCommand

      public void setExecuteCommand(boolean executeCommand)

    • queryMeta

      public ResultInterface queryMeta()
      Description copied from class: Prepared
      Get an empty result set containing the meta data.
      Specified by:
      queryMeta in class Prepared
      Returns:
      the result set

    • checkParameters

      protected void checkParameters()
      Description copied from class: Prepared
      Check if all parameters have been set.
      Overrides:
      checkParameters in class Prepared

    • query

      public ResultInterface query(long maxrows)
      Description copied from class: Prepared
      Execute the query.
      Overrides:
      query in class Prepared
      Parameters:
      maxrows - the maximum number of rows to return
      Returns:
      the result set

    • add

      private void add(String text)

    • isQuery

      public boolean isQuery()
      Description copied from class: Prepared
      Check if this object is a query.
      Overrides:
      isQuery in class Prepared
      Returns:
      true if it is

    • isTransactional

      public boolean isTransactional()
      Description copied from class: Prepared
      Check if this command is transactional. If it is not, then it forces the current transaction to commit.
      Specified by:
      isTransactional in class Prepared
      Returns:
      true if it is

    • isReadOnly

      public boolean isReadOnly()
      Description copied from class: Prepared
      Check if this command is read only.
      Overrides:
      isReadOnly in class Prepared
      Returns:
      true if it is

    • getType

      public int getType()
      Description copied from class: Prepared
      Get the command type as defined in CommandInterface
      Specified by:
      getType in class Prepared
      Returns:
      the statement type

    • collectDependencies

      public void collectDependencies(HashSet<DbObject> dependencies)
      Description copied from class: Prepared
      Find and collect all DbObjects, this Prepared depends on.
      Overrides:
      collectDependencies in class Prepared
      Parameters:
      dependencies - collection of dependencies to populate