private void CreateSequence(Schema schema, StorageSequenceInfo sequenceInfo, string name)
{
var sequence = schema.CreateSequence(name);
var descriptor = new SequenceDescriptor(sequence, sequenceInfo.Seed, sequenceInfo.Increment)
{
MinValue = sequenceInfo.Seed
};
sequence.SequenceDescriptor = descriptor;
}
/// <inheritdoc/>
protected override IPathNode VisitSequence(Sequence sequence)
{
var sequenceInfo = new StorageSequenceInfo(targetModel, resolver.GetNodeName(sequence))
{
Increment = sequence.SequenceDescriptor.Increment.Value,
// StartValue = sequence.SequenceDescriptor.StartValue.Value,
};
return(sequenceInfo);
}
/// <summary>
/// Visits the generator table.
/// </summary>
/// <param name="generatorTable">The generator table.</param>
/// <returns>Visit result.</returns>
private IPathNode VisitGeneratorTable(Table generatorTable)
{
var idColumn = generatorTable.TableColumns[0];
var startValue = idColumn.SequenceDescriptor.StartValue;
var increment = idColumn.SequenceDescriptor.Increment;
var type = ExtractType(idColumn);
var sequence =
new StorageSequenceInfo(targetModel, resolver.GetNodeName(generatorTable))
{
Seed = startValue ?? 0,
Increment = increment ?? 1,
Type = type,
};
return(sequence);
}
/// <inheritdoc/>
protected override IPathNode VisitSequence(Sequence sequence)
{
var sequenceInfo = new StorageSequenceInfo(targetModel, resolver.GetNodeName(sequence))
{
Increment = sequence.SequenceDescriptor.Increment.Value
};
if (sequence.SequenceDescriptor.StartValue != null)
{
sequenceInfo.Seed = sequence.SequenceDescriptor.StartValue.Value;
}
if (sequence.SequenceDescriptor.LastValue != null)
{
sequenceInfo.Current = sequence.SequenceDescriptor.LastValue;
}
return(sequenceInfo);
}
private void CreateGeneratorTable(Schema schema, StorageSequenceInfo sequenceInfo, string name)
{
var sequenceTable = schema.CreateTable(name);
var idColumn = sequenceTable.CreateColumn(WellKnown.GeneratorColumnName,
(SqlValueType)sequenceInfo.Type.NativeType);
idColumn.SequenceDescriptor =
new SequenceDescriptor(
idColumn,
sequenceInfo.Current ?? sequenceInfo.Seed,
sequenceInfo.Increment);
sequenceTable.CreatePrimaryKey(string.Format("PK_{0}", sequenceInfo.Name), idColumn);
if (!provider.Supports(ProviderFeatures.InsertDefaultValues))
{
var fakeColumn = sequenceTable.CreateColumn(WellKnown.GeneratorFakeColumnName, driver.MapValueType(typeof(int)));
fakeColumn.IsNullable = true;
}
}
/// <inheritdoc/>
protected override IPathNode VisitKeyInfo(KeyInfo keyInfo)
{
if (keyInfo.Sequence == null || !keyInfo.IsFirstAmongSimilarKeys)
{
return(null);
}
var sequenceInfo = keyInfo.Sequence;
long increment = 1;
if (providerInfo.Supports(ProviderFeatures.ArbitraryIdentityIncrement) || providerInfo.Supports(ProviderFeatures.Sequences))
{
increment = sequenceInfo.Increment;
}
var sequence = new StorageSequenceInfo(targetModel, resolver.GetNodeName(sequenceInfo))
{
Seed = sequenceInfo.Seed,
Increment = increment,
Type = CreateType(keyInfo.TupleDescriptor[0], null, null, null),
};
return(sequence);
}
