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Speed up recognizing ledger history.

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This commit is contained in:
JoelKatz
2013-07-14 20:08:58 -07:00
parent a37349e1a7
commit 1389d0a542
1 changed files with 11 additions and 23 deletions
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34
src/cpp/ripple/Ledger.cpp
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@@ -894,39 +894,27 @@ bool Ledger::getHashesByIndex (uint32 ledgerIndex, uint256& ledgerHash, uint256&
std::map< uint32, std::pair<uint256, uint256> > Ledger::getHashesByIndex (uint32 minSeq, uint32 maxSeq)
{
#ifndef NO_SQLITE_PREPARE
std::map< uint32, std::pair<uint256, uint256> > ret;
std::string sql = "SELECT LedgerSeq,LedgerHash,PrevHash FROM Ledgers WHERE LedgerSeq >= ";
sql.append (boost::lexical_cast<std::string> (minSeq));
sql.append (" AND LedgerSeq <= ");
sql.append (boost::lexical_cast<std::string> (maxSeq));
sql.append (";");
DatabaseCon* con = getApp().getLedgerDB ();
ScopedLock sl (con->getDBLock ());
SqliteStatement pSt (con->getDB ()->getSqliteDB (),
"SELECT LedgerSeq,LedgerHash,PrevHash FROM Ledgers INDEXED BY SeqLedger "
"WHERE LedgerSeq >= ? AND LedgerSeq <= ?;");
SqliteStatement pSt (con->getDB ()->getSqliteDB (), sql);
std::pair<uint256, uint256> hashes;
pSt.bind (1, minSeq);
pSt.bind (2, maxSeq);
do
while (pSt.isRow (pSt.step ()))
{
int r = pSt.step ();
if (pSt.isDone (r))
return ret;
if (!pSt.isRow (r))
return ret;
std::pair<uint256, uint256>& hashes = ret[pSt.getUInt32 (0)];
hashes.first.SetHexExact (pSt.peekString (1));
hashes.second.SetHexExact (pSt.peekString (2));
ret[pSt.getUInt32 (0)] = hashes;
}
while (1);
#else
#error SQLite prepare is required
#endif
return ret;
}
Ledger::pointer Ledger::getLastFullLedger ()