internal static KdbndpCommand GetKdbndpCommand <T>(DbContext context, Type type, IList <T> entities, TableInfo tableInfo, KdbndpConnection connection, KdbndpTransaction transaction)
{
KdbndpCommand command = connection.CreateCommand();
command.Transaction = transaction;
var operationType = tableInfo.BulkConfig.OperationType;
switch (operationType)
{
case OperationType.Insert:
command.CommandText = SqlQueryBuilderSqlite.InsertIntoTable(tableInfo, OperationType.Insert);
break;
case OperationType.InsertOrUpdate:
command.CommandText = SqlQueryBuilderSqlite.InsertIntoTable(tableInfo, OperationType.InsertOrUpdate);
break;
case OperationType.InsertOrUpdateDelete:
throw new NotSupportedException("Sqlite supports only UPSERT(analog for MERGE WHEN MATCHED) but does not have functionality to do: 'WHEN NOT MATCHED BY SOURCE THEN DELETE'" +
"What can be done is to read all Data, find rows that are not in input List, then with those do the BulkDelete.");
case OperationType.Update:
command.CommandText = SqlQueryBuilderSqlite.UpdateSetTable(tableInfo);
break;
case OperationType.Delete:
command.CommandText = SqlQueryBuilderSqlite.DeleteFromTable(tableInfo);
break;
}
type = tableInfo.HasAbstractList ? entities[0].GetType() : type;
var entityType = context.Model.FindEntityType(type);
var entityPropertiesDict = entityType.GetProperties().Where(a => tableInfo.PropertyColumnNamesDict.ContainsKey(a.Name)).ToDictionary(a => a.Name, a => a);
var properties = type.GetProperties();
foreach (var property in properties)
{
if (entityPropertiesDict.ContainsKey(property.Name))
{
var propertyEntityType = entityPropertiesDict[property.Name];
string columnName = propertyEntityType.GetColumnName();
var propertyType = Nullable.GetUnderlyingType(property.PropertyType) ?? property.PropertyType;
/*var sqliteType = SqliteType.Text; // "String" || "Decimal" || "DateTime"
* if (propertyType.Name == "Int16" || propertyType.Name == "Int32" || propertyType.Name == "Int64")
* sqliteType = SqliteType.Integer;
* if (propertyType.Name == "Float" || propertyType.Name == "Double")
* sqliteType = SqliteType.Real;
* if (propertyType.Name == "Guid" )
* sqliteType = SqliteType.Blob; */
var parameter = new KdbndpParameter($"@{columnName}", propertyType); // ,sqliteType // ,null
command.Parameters.Add(parameter);
}
}
var shadowProperties = tableInfo.ShadowProperties;
foreach (var shadowProperty in shadowProperties)
{
var parameter = new KdbndpParameter($"@{shadowProperty}", typeof(string));
command.Parameters.Add(parameter);
}
command.Prepare(); // Not Required (check if same efficiency when removed)
return(command);
}
public async Task MergeAsync <T>(DbContext context, Type type, IList <T> entities, TableInfo tableInfo, OperationType operationType,
Action <decimal> progress, CancellationToken cancellationToken) where T : class
{
var connection = await OpenAndGetSqliteConnectionAsync(context, tableInfo.BulkConfig, cancellationToken).ConfigureAwait(false);
bool doExplicitCommit = false;
try
{
if (context.Database.CurrentTransaction == null)
{
//context.Database.UseTransaction(connection.BeginTransaction());
doExplicitCommit = true;
}
var transaction = (KdbndpTransaction)(context.Database.CurrentTransaction == null ?
connection.BeginTransaction() :
context.Database.CurrentTransaction.GetUnderlyingTransaction(tableInfo.BulkConfig));
using (var command = GetKdbndpCommand(context, type, entities, tableInfo, connection, transaction))
{
type = tableInfo.HasAbstractList ? entities[0].GetType() : type;
int rowsCopied = 0;
foreach (var item in entities)
{
LoadSqliteValues(tableInfo, item, command);
await command.ExecuteNonQueryAsync(cancellationToken).ConfigureAwait(false);
ProgressHelper.SetProgress(ref rowsCopied, entities.Count, tableInfo.BulkConfig, progress);
}
if (operationType != OperationType.Delete && tableInfo.BulkConfig.SetOutputIdentity && tableInfo.IdentityColumnName != null)
{
command.CommandText = SqlQueryBuilderSqlite.SelectLastInsertRowId();
long lastRowIdScalar = (long)await command.ExecuteScalarAsync(cancellationToken).ConfigureAwait(false);
string identityPropertyName = tableInfo.PropertyColumnNamesDict.SingleOrDefault(a => a.Value == tableInfo.IdentityColumnName).Key;
var identityPropertyInteger = false;
var identityPropertyUnsigned = false;
var identityPropertyByte = false;
var identityPropertyShort = false;
if (tableInfo.FastPropertyDict[identityPropertyName].Property.PropertyType == typeof(ulong))
{
identityPropertyUnsigned = true;
}
else if (tableInfo.FastPropertyDict[identityPropertyName].Property.PropertyType == typeof(uint))
{
identityPropertyInteger = true;
identityPropertyUnsigned = true;
}
else if (tableInfo.FastPropertyDict[identityPropertyName].Property.PropertyType == typeof(int))
{
identityPropertyInteger = true;
}
else if (tableInfo.FastPropertyDict[identityPropertyName].Property.PropertyType == typeof(ushort))
{
identityPropertyShort = true;
identityPropertyUnsigned = true;
}
else if (tableInfo.FastPropertyDict[identityPropertyName].Property.PropertyType == typeof(short))
{
identityPropertyShort = true;
}
else if (tableInfo.FastPropertyDict[identityPropertyName].Property.PropertyType == typeof(byte))
{
identityPropertyByte = true;
identityPropertyUnsigned = true;
}
else if (tableInfo.FastPropertyDict[identityPropertyName].Property.PropertyType == typeof(sbyte))
{
identityPropertyByte = true;
}
for (int i = entities.Count - 1; i >= 0; i--)
{
if (identityPropertyByte)
{
if (identityPropertyUnsigned)
{
tableInfo.FastPropertyDict[identityPropertyName].Set(entities[i], (byte)lastRowIdScalar);
}
else
{
tableInfo.FastPropertyDict[identityPropertyName].Set(entities[i], (sbyte)lastRowIdScalar);
}
}
else if (identityPropertyShort)
{
if (identityPropertyUnsigned)
{
tableInfo.FastPropertyDict[identityPropertyName].Set(entities[i], (ushort)lastRowIdScalar);
}
else
{
tableInfo.FastPropertyDict[identityPropertyName].Set(entities[i], (short)lastRowIdScalar);
}
}
else if (identityPropertyInteger)
{
if (identityPropertyUnsigned)
{
tableInfo.FastPropertyDict[identityPropertyName].Set(entities[i], (uint)lastRowIdScalar);
}
else
{
tableInfo.FastPropertyDict[identityPropertyName].Set(entities[i], (int)lastRowIdScalar);
}
}
else
{
if (identityPropertyUnsigned)
{
tableInfo.FastPropertyDict[identityPropertyName].Set(entities[i], (ulong)lastRowIdScalar);
}
else
{
tableInfo.FastPropertyDict[identityPropertyName].Set(entities[i], lastRowIdScalar);
}
}
lastRowIdScalar--;
}
}
if (doExplicitCommit)
{
transaction.Commit();
}
}
}
finally
{
await context.Database.CloseConnectionAsync().ConfigureAwait(false);
}
}