Class FBTableStatisticsManager
- java.lang.Object
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- org.firebirdsql.management.FBTableStatisticsManager
 
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- All Implemented Interfaces:
- java.lang.AutoCloseable
 
 @Volatile(reason="Experimental") public final class FBTableStatisticsManager extends java.lang.Object implements java.lang.AutoCloseable Provides access to the table statistics of aConnection.The table statistics are execution statistics of the specific connection, and are not global statistics. This manager retains a reference to underlying FbDatabaseinstance and holds a cache of table names. Closing this manager will remove the reference the database handle (but not close it!) and releases the cache.This class is not thread-safe (though its use of the underlying connection is thread-safe). - Since:
- 5
- Author:
- Mark Rotteveel
 
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Method SummaryAll Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description voidclose()Clears the reference to the connection and clears the cache.java.util.Map<java.lang.String,TableStatistics>getTableStatistics()Obtains a snapshot of the table statistics of this connection.static FBTableStatisticsManagerof(java.sql.Connection connection)Creates a table statistics manager for the current connection.
 
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Method Detail- 
ofpublic static FBTableStatisticsManager of(java.sql.Connection connection) throws java.sql.SQLException Creates a table statistics manager for the current connection.- Parameters:
- connection- Connection to gather statistics on.
- Returns:
- a table statistics manager
- Throws:
- java.sql.SQLException- if- connectionis closed
 
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getTableStatisticspublic java.util.Map<java.lang.String,TableStatistics> getTableStatistics() throws java.sql.SQLException Obtains a snapshot of the table statistics of this connection.A table is only present in the map if this connection touched it in a way which generated a statistic. - Returns:
- map from table name to table statistics
- Throws:
- InfoTruncatedException- if a truncated response is received, after retrying 3 times (total: 4 attempts) while increasing the buffer size; it is possible that subsequent calls to this method may recover (as that will increase the buffer size even more)
- java.sql.SQLException- if the connection is closed, or if obtaining the statistics failed due to a database access error
 
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closepublic void close() Clears the reference to the connection and clears the cache.This method does not close the connection wrapped by this manager. Closing a table statistics manager is not required. It can be used to clean up early, or to prevent a user of this class from gathering further statistics. - Specified by:
- closein interface- java.lang.AutoCloseable
 
 
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