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  /*
   * Firebird Open Source J2EE Connector - JDBC Driver
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 package org.firebirdsql.management;
 
 
A StatisticsManager is responsible for replicating the functionality of the gstat command-line tool. This functionality includes:
  • Retrieving data table statistics
  • Retrieving the database header page
  • Retrieving index statistics
  • Retrieving database logging information
  • Retrieving statistics for the data dictionary

Author(s):
Gabriel Reid
 
 public interface StatisticsManager extends ServiceManager {

    
Request statistics on data tables.
 
     public static final int DATA_TABLE_STATISTICS = .;

    
Request statistics on indexes.
 
     public static final int INDEX_STATISTICS = .;

    
Request statistics on system tables.
 
     public static final int SYSTEM_TABLE_STATISTICS = .;
    
    
Request statistics on record versions.
 
     public static final int RECORD_VERSION_STATISTICS = .;
    
    
Request statistics on
 

    
Fetch the database statistics header page. The header information is written to this StatisticsManager's logger.

Throws:
java.sql.SQLException if a database access error occurs
 
     public void getHeaderPage() throws SQLException;

    
Get the full database statistics information, excluding system table information. The statistics information is written to this StatisticsManager's logger.

The listed data includes:

  • statistics header page
  • log statistics
  • index statistics
  • data table statistics

Invoking this method is equivalent to the default behaviour of gstat on the command-line.

Throws:
java.sql.SQLException if a database access error occurs
    public void getDatabaseStatistics() throws SQLException

    
Get specific database statistics. The statistics information is written to this StatisticsManager's logger. All invocations of this method will result in the header page and log data being output. The following options can be supplied as a bitmask:
  • DATA_TABLE_STATISTICS
  • SYSTEM_TABLE_STATISTICS
  • INDEX_STATISTICS
  • RECORD_VERSION_STATISTICS

If this method is invoked with 0 as the options value, only the header and log statistics will be output.

Parameters:
options A bitmask combination of DATA_TABLE_STATISTICS, SYSTEM_TABLE_STATISTICS, INDEX_STATISTICS, or RECORD_VERSION_STATISTICS. Can also be 0, which is equivalent to calling method getDatabaseStatistics()
    public void getDatabaseStatistics(int optionsthrows SQLException;

    
Get the table statistics. The statistics information is written to this StatisticsManager's logger.

The listed data includes:

  • the primary pointer and index root page numbers
  • number of data pages and their average fill
  • fill distribution

Invoking this method is equivalent to the behaviour of gstat -t

on the command-line.

Parameters:
tableNames array of table names to analyze.
Throws:
java.sql.SQLException if something went wrong.
    public void getTableStatistics(String[] tableNamesthrows SQLException;
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