public IEnumerable <IRow> Read()
{
var batches = _parent.Entities.Select(e => e.BatchId).ToArray();
var minBatchId = batches.Min();
var maxBatchId = batches.Max();
_output.Info("Batch Range: {0} to {1}.", minBatchId, maxBatchId);
var sql = $"SELECT {string.Join(",", _output.Entity.Fields.Where(f=>f.Output).Select(f => _cf.Enclose(f.Alias)))} FROM {_cf.Enclose(_output.Process.Star)} {(_cf.AdoProvider == AdoProvider.SqlServer ? "WITH (NOLOCK)" : string.Empty)} WHERE {_cf.Enclose(Constants.TflBatchId)} BETWEEN @MinBatchId AND @MaxBatchId;";
_output.Debug(() => sql);
using (var cn = _cf.GetConnection()) {
cn.Open();
var cmd = cn.CreateCommand();
cmd.CommandTimeout = 0;
cmd.CommandType = CommandType.Text;
cmd.CommandText = sql;
var min = cmd.CreateParameter();
min.ParameterName = "@MinBatchId";
min.Value = minBatchId;
min.Direction = ParameterDirection.Input;
min.DbType = DbType.Int32;
var max = cmd.CreateParameter();
max.ParameterName = "@MaxBatchId";
max.Value = maxBatchId;
max.Direction = ParameterDirection.Input;
max.DbType = DbType.Int32;
cmd.Parameters.Add(min);
cmd.Parameters.Add(max);
var reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess);
var rowCount = 0;
var fieldArray = _output.Entity.Fields.ToArray();
while (reader.Read())
{
rowCount++;
_output.Increment();
yield return(_rowCreator.Create(reader, fieldArray));
}
_output.Info("{0} from {1}", rowCount, _output.Connection.Name);
}
}
public IEnumerable <IRow> Read(IEnumerable <IRow> input)
{
using (var cn = _cf.GetConnection()) {
cn.Open();
var trans = cn.BeginTransaction();
cn.Execute(_create, null, trans);
var keys = input.Select(r => r.ToExpandoObject(_keys));
cn.Execute(_insert, keys, trans, 0, System.Data.CommandType.Text);
using (var reader = cn.ExecuteReader(_query, null, trans, 0, System.Data.CommandType.Text)) {
while (reader.Read())
{
yield return(_rowCreator.Create(reader, _input.InputFields));
}
}
cn.Execute(_drop, null, trans);
trans.Commit();
}
}
public IEnumerable <IRow> Read(IEnumerable <IRow> input)
{
var results = new List <IRow>();
using (var cn = _cf.GetConnection()) {
cn.Open();
_context.Debug(() => "begin transaction");
var trans = cn.BeginTransaction();
try {
var createSql = SqlCreateKeysTable(_tempTable);
cn.Execute(createSql, null, trans);
var keys = input.Select(r => r.ToExpandoObject(_keys));
var insertSql = SqlInsertTemplate(_context, _tempTable, _keys);
cn.Execute(insertSql, keys, trans, 0, System.Data.CommandType.Text);
using (var reader = cn.ExecuteReader(SqlQuery(), null, trans, 0, System.Data.CommandType.Text)) {
while (reader.Read())
{
var row = _rowCreator.Create(reader, _fields);
results.Add(row);
}
}
var sqlDrop = SqlDrop(_tempTable, _cf);
cn.Execute(sqlDrop, null, trans);
_context.Debug(() => "commit transaction");
trans.Commit();
} catch (Exception ex) {
_context.Error(ex.Message);
_context.Warn("rollback transaction");
trans.Rollback();
}
}
return(results);
}
public IEnumerable <IRow> Read()
{
using (var cn = _cf.GetConnection()) {
cn.Open();
var cmd = cn.CreateCommand();
cmd.CommandTimeout = 0;
cmd.CommandType = CommandType.Text;
cmd.CommandText = $@"
SELECT {string.Join(",", _fields.Select(f => _readFrom == ReadFrom.Output ? _cf.Enclose(f.FieldName()) : _cf.Enclose(f.Name)))}
FROM {_schemaPrefix}{_cf.Enclose(_tableOrView)} {(_connection.Provider == "sqlserver" && _context.Entity.NoLock ? "WITH (NOLOCK)" : string.Empty)}
{_filter};";
_context.Debug(() => cmd.CommandText);
var reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess);
while (reader.Read())
{
_rowCount++;
yield return(_rowCreator.Create(reader, _fields));
}
_context.Info("{0} from {1}", _rowCount, _connection.Name);
}
}
public IEnumerable <IRow> Read()
{
using (var cn = _factory.GetConnection()) {
cn.Open();
var cmd = cn.CreateCommand();
if (string.IsNullOrEmpty(_input.Entity.Query))
{
if (_input.Entity.MinVersion == null)
{
cmd.CommandText = _input.SqlSelectInput(_fields, _factory, _input.ResolveOrder);
if (_input.Entity.IsPageRequest())
{
var start = (_input.Entity.Page * _input.Entity.PageSize) - _input.Entity.PageSize;
var end = start + _input.Entity.PageSize;
switch (_factory.AdoProvider)
{
case AdoProvider.SqlServer:
cmd.CommandText = $"WITH p AS ({cmd.CommandText}) SELECT {string.Join(",", _fields.Select(f => _factory.Enclose(f.Name)))} FROM p WHERE TflRow BETWEEN {start + 1} AND {end}";
break;
case AdoProvider.PostgreSql:
cmd.CommandText += $" LIMIT {_input.Entity.PageSize} OFFSET {start}";
break;
default:
cmd.CommandText += $" LIMIT {start},{_input.Entity.PageSize}";
break;
}
}
_input.Debug(() => cmd.CommandText);
}
else
{
cmd.CommandText = _input.SqlSelectInputWithMinVersion(_fields, _factory, _input.ResolveOrder);
_input.Debug(() => cmd.CommandText);
var parameter = cmd.CreateParameter();
parameter.ParameterName = "@MinVersion";
parameter.Direction = ParameterDirection.Input;
parameter.Value = _input.Entity.MinVersion;
cmd.Parameters.Add(parameter);
}
if (_input.Entity.IsPageRequest())
{
var sql = $"SELECT COUNT(*) FROM {_input.SqlInputName(_factory)} {(_factory.AdoProvider == AdoProvider.SqlServer ? "WITH (NOLOCK)" : string.Empty)} {(_input.Entity.Filter.Any() ? " WHERE " + _input.ResolveFilter(_factory) : string.Empty)}";
_input.Debug(() => sql);
_input.Entity.Hits = cn.ExecuteScalar <int>(sql);
}
_input.Entity.Query = cmd.CommandText;
}
else
{
cmd.CommandText = _input.Entity.Query;
}
cmd.CommandType = CommandType.Text;
cmd.CommandTimeout = 0;
using (var reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess)) {
// transform types if sqlite
if (_factory.AdoProvider == AdoProvider.SqLite)
{
while (reader.Read())
{
_rowCount++;
_input.Increment();
var row = _rowCreator.Create(reader, _fields);
_typeTransform.Transform(row);
yield return(row);
}
}
else
{
// check the first one's types
if (reader.Read())
{
var row = _rowCreator.Create(reader, _fields);
foreach (var field in _fields)
{
var expected = Constants.TypeSystem()[field.Type];
var actual = row[field] == null ? expected : row[field].GetType();
if (expected != actual)
{
_input.Warn($"The {field.Alias} field in {_input.Entity.Alias} expects a {expected}, but is reading a {actual}.");
}
}
_rowCount++;
_input.Increment();
yield return(row);
}
// just read
while (reader.Read())
{
_rowCount++;
_input.Increment();
yield return(_rowCreator.Create(reader, _fields));
}
}
}
_input.Info("{0} from {1}", _rowCount, _input.Connection.Name);
}
}
