public async Task ApplyAll(NpgsqlConnection conn, DdlRules rules, AutoCreate autoCreate, Action <string> logSql = null, Action <NpgsqlCommand, Exception> onFailure = null)
{
if (autoCreate == AutoCreate.None)
{
return;
}
if (Difference == SchemaPatchDifference.None)
{
return;
}
if (!_deltas.Any())
{
return;
}
var writer = new StringWriter();
foreach (var schema in _schemas)
{
await writer.WriteLineAsync(CreateSchemaStatementFor(schema));
}
WriteAllUpdates(writer, rules, autoCreate);
var cmd = conn.CreateCommand(writer.ToString());
logSql?.Invoke(cmd.CommandText);
try
{
await cmd
.ExecuteNonQueryAsync();
}
catch (Exception e)
{
if (onFailure != null)
{
onFailure(cmd, e);
}
else
{
throw;
}
}
}
public void WriteAllRollbacks(TextWriter writer, DdlRules rules)
{
foreach (var delta in _deltas)
{
switch (delta.Difference)
{
case SchemaPatchDifference.None:
continue;
case SchemaPatchDifference.Create:
delta.SchemaObject.WriteDropStatement(rules, writer);
break;
case SchemaPatchDifference.Update:
delta.WriteRollback(rules, writer);
break;
case SchemaPatchDifference.Invalid:
delta.SchemaObject.WriteDropStatement(rules, writer);
delta.WriteRestorationOfPreviousState(rules, writer);
break;
}
}
}
public void WriteRestorationOfPreviousState(DdlRules rules, TextWriter writer)
{
Actual.WriteCreateStatement(rules, writer);
}
public virtual void WriteRollback(DdlRules rules, TextWriter writer)
{
Expected.WriteDropStatement(rules, writer);
Actual.WriteCreateStatement(rules, writer);
}
public abstract void WriteUpdate(DdlRules rules, TextWriter writer);
public void WriteDropStatement(DdlRules rules, TextWriter writer)
{
writer.WriteLine($"DROP EXTENSION IF EXISTS {ExtensionName} CASCADE;");
}
public void WriteCreateStatement(DdlRules rules, TextWriter writer)
{
writer.WriteLine($"CREATE EXTENSION IF NOT EXISTS {ExtensionName};");
}
public void WriteDropStatement(DdlRules rules, TextWriter writer)
{
writer.WriteLine($"DROP SEQUENCE IF EXISTS {Identifier};");
}