private static void CreateHistoryTable(RelationalTable baseTable, DwhBuilderConfiguration configuration)
{
var historyTable = baseTable.Schema.AddTable(baseTable.Name + configuration.HistoryTableNamePostfix).SetIsHistoryTable();
var identityColumnName = (configuration.HistoryTableIdentityColumnBase ?? historyTable.Name) + configuration.HistoryTableIdentityColumnPostfix;
historyTable.AddColumn(identityColumnName, true).SetIdentity();
foreach (var column in baseTable.Columns)
{
historyTable.AddColumn(column.Name, false);
}
if (baseTable.PrimaryKeyColumns.Count > 0)
{
var historyFkToBase = historyTable.AddForeignKeyTo(baseTable);
foreach (var basePkColumn in baseTable.PrimaryKeyColumns)
{
historyFkToBase.AddColumnPair(historyTable[basePkColumn.Name], basePkColumn);
}
}
foreach (var baseFk in baseTable.ForeignKeys)
{
var historyFk = historyTable.AddForeignKeyTo(baseFk.TargetTable);
foreach (var baseFkPair in baseFk.ColumnPairs)
{
historyFk.AddColumnPair(historyTable[baseFkPair.SourceColumn.Name], baseFkPair.TargetColumn);
}
}
baseTable.AddColumn(configuration.ValidFromColumnName, false);
historyTable.AddColumn(configuration.ValidFromColumnName, false);
historyTable.AddColumn(configuration.ValidToColumnName, false);
}
public static T Extend <T>(T model, DwhBuilderConfiguration configuration)
where T : RelationalModel
{
if (configuration.UseEtlRunInfo)
{
var etlRunTable = model.DefaultSchema.AddTable(configuration.EtlRunTableName).SetEtlRunInfo();
etlRunTable.AddColumn("StartedOn", false);
etlRunTable.AddColumn("Name", false);
etlRunTable.AddColumn("MachineName", false);
etlRunTable.AddColumn("UserName", false);
etlRunTable.AddColumn("FinishedOn", false);
etlRunTable.AddColumn("Result", false);
foreach (var schema in model.Schemas)
{
foreach (var baseTable in schema.Tables)
{
if (baseTable.GetEtlRunInfoDisabled() || baseTable == etlRunTable)
{
continue;
}
var c1 = baseTable.AddColumn(configuration.EtlRunInsertColumnName, false).SetUsedByEtlRunInfo();
var c2 = baseTable.AddColumn(configuration.EtlRunUpdateColumnName, false).SetUsedByEtlRunInfo();
var c3 = baseTable.AddColumn(configuration.EtlRunFromColumnName, false).SetUsedByEtlRunInfo();
var c4 = baseTable.AddColumn(configuration.EtlRunToColumnName, false).SetUsedByEtlRunInfo();
baseTable.AddForeignKeyTo(etlRunTable).AddColumnPair(c1, etlRunTable["StartedOn"]);
baseTable.AddForeignKeyTo(etlRunTable).AddColumnPair(c2, etlRunTable["StartedOn"]);
baseTable.AddForeignKeyTo(etlRunTable).AddColumnPair(c3, etlRunTable["StartedOn"]);
baseTable.AddForeignKeyTo(etlRunTable).AddColumnPair(c4, etlRunTable["StartedOn"]);
}
}
}
var baseTablesWithHistory = model.Schemas.SelectMany(x => x.Tables)
.Where(x => x.GetHasHistoryTable() && !x.GetIsEtlRunInfo());
foreach (var baseTable in baseTablesWithHistory)
{
CreateHistoryTable(baseTable, configuration);
}
return(model);
}
