/// <summary>
/// Compares the table definitions for two tables.
/// </summary>
/// <param name="sourceTable"></param>
/// <param name="destinationTable"></param>
private void FilterMatches(TableDescriptor sourceTable, TableDescriptor destinationTable)
{
// Filter definitions so they only contain the differences
DataTableComparer.FilterMatches(sourceTable.ColumnDefinition, destinationTable.ColumnDefinition, new string[] { "COLUMN_NAME" }, new string[] { "TABLE_CATALOG", "ORDINAL_POSITION" });
DataTableComparer.FilterMatches(sourceTable.ConstraintDefinition, destinationTable.ConstraintDefinition, new string[] { "CONSTRAINT_NAME" }, new string[] { "CONSTRAINT_CATALOG", "TABLE_CATALOG" });
DataTableComparer.FilterMatches(sourceTable.ForeignKeyDefinition, destinationTable.ForeignKeyDefinition, new string[] { "FOREIGN_KEY_NAME" }, null);
DataTableComparer.FilterMatches(sourceTable.IndexDefinition, destinationTable.IndexDefinition, new string[] { "INDEX_NAME", "COLUMN_NAME" }, new string[] { "TABLE_CATALOG", "INDEX_CATALOG", "CARDINALITY", "PAGES" });
DataTableComparer.FilterMatches(sourceTable.TableInfoDefinition, destinationTable.TableInfoDefinition, new string[] { "TABLE_NAME" }, new string[] { "TABLE_CATALOG", "TABLE_VERSION", "CARDINALITY" });
DataTableComparer.FilterMatches(sourceTable.TableDefinition, destinationTable.TableDefinition, new string[] { "TABLE_NAME" }, new string[] { "TABLE_CATALOG", "DATE_CREATED", "DATE_MODIFIED" });
}
internal TableComparison(string tablename, TableDescriptor sourceTable, TableDescriptor destinationTable)
{
_tablename = tablename;
_sourceTable = sourceTable;
_destinationTable = destinationTable;
}
/// <summary>
/// Compares all the supplied table definitions.
/// </summary>
/// <param name="sourceTables"></param>
/// <param name="destinationTables"></param>
private void CompareAllTables(DataTable sourceTables, DataTable destinationTables, DatabaseComparison comparison)
{
// Verify source tables
foreach(DataRow row in sourceTables.Rows) {
// Fetch information about source table
string tabname = (string)row["TABLE_NAME"];
Debug.WriteLine("Retrieving table information for " + tabname);
DataSet ds = _sourceDbService.GetTableInfo(tabname);
TableDescriptor sourceTable = new TableDescriptor(ds);
// Lookup destination table
TableComparison tablecomparison;
DataRow[] desttabs = destinationTables.Select(string.Format("TABLE_NAME='{0}'", tabname));
if(desttabs.Length > 0) {
// Table exists in destination, retrieve more info and compare them
ds = _destinationDbService.GetTableInfo(tabname);
TableDescriptor destinationTable = new TableDescriptor(ds);
FilterMatches(sourceTable, destinationTable);
// Create comparison result
tablecomparison = new TableComparison(tabname, sourceTable, destinationTable);
}
else {
// Create comparison result (destination table is missing)
tablecomparison = new TableComparison(tabname, sourceTable, null);
}
// Add comparison result and fire event
comparison.TableComparisons.Add(tablecomparison);
EventManager.OnTableComparisonComplete(tablecomparison);
}
}
