private SynFootprint ReadFootprint(BinaryReader br)
{
byte eof = br.ReadByte();
if (eof == 1)
{
return(null);
}
return(SynFootprint.FromStream(br, m_srcInfo.KeyCols.Length));
}
public static SynFootprint FromStream(BinaryReader br, int keylen)
{
var res = new SynFootprint();
res.KeyData = new string[keylen];
for (int i = 0; i < keylen; i++)
{
res.KeyData[i] = br.ReadString();
}
res.Hash = br.ReadString();
return(res);
}
public static SynFootprint FromReader(IBedRecord record, int keylen, BedValueHolder holder, BedValueConvertor conv, IDataSynAdapter adapter)
{
var res = new SynFootprint();
res.KeyData = new string[keylen];
for (int i = 0; i < keylen; i++)
{
record.ReadValue(i);
conv.ConvertValue(record, TypeStorage.String, holder);
res.KeyData[i] = holder.GetString();
}
record.ReadValue(keylen);
res.Hash = adapter.ReadHash(record, conv, holder);
return(res);
}
private void DoLoadFootprint(IDatabaseSource conn, SynSourceInfo info, string cacheFile)
{
// HACK: external sorting must be implemented
using (var fw = new FileStream(cacheFile, FileMode.Create))
{
var fts = new List <SynFootprint>();
using (var bw = new BinaryWriter(fw))
{
var sada = conn.Dialect.CreateDataSynAdapter();
if (sada == null)
{
throw new ExpectedError("DAE-00365 " + Texts.Get("s_dialect_doesnt_support_sync$dialect", "dialect", conn.Dialect.DisplayName));
}
var qbuf = new StringWriter();
var dmp = conn.Dialect.CreateDumper(qbuf);
var qtype = m_options.Update == true ? SynQueryType.SelectKeyMd5 : SynQueryType.SelectKeyNull;
info.Query.GenerateSql(dmp, sada, info, qtype, d2 =>
{
if (!info.SqlCondition.IsEmpty())
{
d2.Put(" ^where ");
d2.WriteRaw(info.SqlCondition);
}
});
using (var cmd = conn.Connection.SystemConnection.CreateCommand())
{
cmd.CommandText = qbuf.ToString();
using (IBedReader reader = conn.GetAnyDDA().AdaptReader(cmd.ExecuteReader()))
{
while (reader.Read())
{
var ft = SynFootprint.FromReader(reader, info.KeyCols.Length, m_holder, m_conv, sada);
fts.Add(ft);
}
}
}
fts.Sort();
foreach (var ft in fts)
{
bw.Write((byte)0);
ft.SaveToStream(bw);
}
bw.Write((byte)1);
}
}
}
public bool EqualKey(SynFootprint other)
{
return(KeyData.EqualSequence(other.KeyData));
}