private static void runSteps(SchemaConnection connection, IOutput output, SchemaChangeOptions options, string phaseName, IEnumerable <ISchemaProvider> providers,
ref DatabaseState currentState, ref ImmutableHashSet <ObjectType> objectTypes, ref StateStorage storage)
{
using (var progress = output.ProgressBlock())
{
output.Message(phaseName + ": Starting...");
// Get object types, get steps, get desired state, get current state, everything else
var chunks = progress.GetChunks(1, 1, 5, 5, 1, 50).ToList();
var oldTypes = objectTypes;
using (chunks[0].Start())
{
objectTypes = (from provider in providers
from objectType in provider.GetObjectTypes(connection.SchemaDriver)
select objectType).ToImmutableHashSet();
output.Verbose(phaseName + ": Object types: " + string.Join(", ", objectTypes));
}
// Get all the steps and organize them into order
IImmutableList <StepBase> steps;
using (chunks[1].Start())
{
steps = sortSteps(from objectType in objectTypes
from step in objectType.Steps
select step);
output.Verbose(phaseName + ": Steps: " + string.Join(", ", steps));
}
// Get the desired state
DatabaseState desiredState;
using (chunks[2].Start())
{
output.Verbose(phaseName + ": Determining desired database state...");
desiredState = DatabaseState.Create(from provider in providers
from state in provider.GetDesiredState(connection, chunks[2])
select state);
foreach (var overrideProvider in providers.OfType <ISchemaOverrideProvider>())
{
desiredState = overrideProvider.ApplyOverrides(connection, desiredState);
}
output.Message(phaseName + ": " + counted(desiredState.Count, "object") + " desired.");
}
ObjectTypeHelper helper;
using (chunks[3].Start())
{
// Get the current state
output.Verbose(phaseName + ": Determining current database state...");
helper = new ObjectTypeHelper(objectTypes, storage != null, connection.DbDriver);
currentState = currentState.With(from objectType in objectTypes
where !oldTypes.Contains(objectType)
from state in objectType.GetExistingObjects(connection, helper)
select state);
output.Verbose(phaseName + ": " + counted(currentState.Count, "object") + " existing.");
}
// Filter to only things that are relevant here
using (chunks[4].Start())
{
output.Verbose(phaseName + ": Filtering...");
if (storage != null)
{
var priorKnownRoots = storage.GetKnownRoots(helper);
var priorKnownSubs = storage.GetKnownSubs(helper);
// Anything that exists in *both* current and desired is treated as known and assumed to be in-scope for consideration
var knownRoots = priorKnownRoots.Union(from root in currentState.RootObjects
where desiredState.Contains(root)
select root.Identifier);
foreach (var extra in knownRoots.Except(priorKnownRoots))
{
storage.PutRoot(extra);
}
// FIXME: remove from storage anything that's of a type that's under consideration but is neither current nor desired
var knownSubs = priorKnownSubs.Union(from sub in currentState.AllChildren
where desiredState.Contains(sub)
select Tuple.Create(sub.ParentIdentifier, sub.Identifier));
foreach (var extra in knownSubs.Except(priorKnownSubs))
{
storage.PutSub(extra.Item1, extra.Item2);
}
// FIXME: remove from storage anything that's of a type that's under consideration but is neither current nor desired
var _storage = storage;
var initialState = currentState;
currentState = currentState.WithFilters((root) => desiredState.ContainsRoot(root) ||
Objects.Tables.TableRenameType.ContainsRenameTo(desiredState, root) ||
Objects.Tables.PendingReorderTableType.IsTablePendingReorder(initialState, root) ||
(options.PreserveUnknownObjects ? !initialState.ContainsRoot(root) : _storage.ContainsRoot(root)),
null);
}
else
{
// FIXME this doesn't allow for any flexibility in whether the nrdo_ tables live in dbo
currentState = currentState.WithFilters(root => root.Name.StartsWith("dbo.nrdo_", StringComparison.OrdinalIgnoreCase),
null);
}
output.Message(phaseName + ": " + counted(currentState.Count, "applicable existing object") + ".");
}
var isFullRun = storage != null;
if (isFullRun)
{
// Sanity check for any before statements that will be skipped due to the associated step not existing
var stepSet = new HashSet <string>(from step in steps select step.Identifier, Nstring.DBEquivalentComparer);
var current = currentState; // Can't use ref parameter directly inside linq query
var unknownBefores = from stmt in BeforeStatementType.AllFrom(desiredState)
where !stepSet.Contains(stmt.State.Step) && !current.Contains(stmt)
select stmt;
foreach (var stmt in unknownBefores)
{
output.Warning(stmt.Name + " on " + stmt.ParentIdentifier + " will not be executed because there is no such step as " + stmt.State.Step);
}
}
var changes = SchemaChanges.Create(currentState, desiredState, connection, chunks[5], options, storage);
changes.PerformSteps(steps, phaseName, isFullRun);
currentState = changes.Current.WithoutFilters();
storage = changes.Storage;
if (changes.HasFailed)
{
throw new ApplicationException("Schema update failed");
}
output.Message(phaseName + ": Completed.");
output.Message(phaseName + ": " + counted(changes.StatementCount, "statement") + " executed.");
output.Message(phaseName + ": " + counted(currentState.Count, "object") + " existing.");
}
}
