Package org.dbunit.database.rowcount

Interface RowCounter

All Known Implementing Classes:
QueryPerTableRowCounter
public interface RowCounter
Counts the rows of a set of database tables. The strategy behind RowCountCheck, configured via DatabaseConfig.PROPERTY_ROW_COUNTER; counting is the expensive part of the row count check and the part most likely to be improved, so it is the one seam the check opens.

An implementation's contract:

  • Return an entry for every requested table name, keyed exactly as supplied.
  • Return entries for no other tables.
  • Counts must be exact. Estimates, such as vendor statistics views that lag asynchronously, are not acceptable however cheap they are, since they would produce false failures.
Table enumeration and exclusion filtering are handled by RowCountCheck before this interface is ever consulted, so an implementation's whole job is counting the list it is handed.
Since:
3.6.0
Author:
dbunit

  • Method Details

    • countRows

      Map<String,Integer> countRows(IDatabaseConnection connection, List<String> tableNames) throws SQLException
      Counts the rows of every given table.
      Parameters:
      connection - the connection to count rows through.
      tableNames - the names of the tables to count; every name must appear as a key in the returned map, and no other keys may appear.
      Returns:
      the row count of each requested table, keyed exactly as supplied.
      Throws:
      SQLException - if counting a table's rows fails.