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support forward flag for cassandra

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CJ Cobb
2021-07-16 18:37:17 +00:00
parent 7040860d8d
commit 63a66b00a6
6 changed files with 81 additions and 66 deletions
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39
src/backend/CassandraBackend.cpp
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@@ -422,19 +422,34 @@ CassandraBackend::fetchAccountTransactions(
do
{
{
CassandraStatement statement{selectAccountTx_};
CassandraStatement statement = [this, forward]() {
if (forward)
return CassandraStatement{selectAccountTxForward_};
else
return CassandraStatement{selectAccountTx_};
}();
statement.bindBytes(account);
if (cursor)
{
statement.bindUInt(cursor->ledgerSequence >> 20 << 20);
statement.bindIntTuple(
cursor->ledgerSequence, cursor->transactionIndex);
BOOST_LOG_TRIVIAL(debug)
<< " account = " << ripple::strHex(account)
<< " idx = " << (cursor->ledgerSequence >> 20 << 20)
<< " tuple = " << cursor->ledgerSequence << " : "
<< cursor->transactionIndex;
}
else
{
statement.bindUInt(rng->maxSequence >> 20 << 20);
int seq = forward ? rng->minSequence : rng->maxSequence;
statement.bindUInt(seq >> 20 << 20);
int placeHolder = forward ? 0 : INT32_MAX;
statement.bindIntTuple(INT32_MAX, INT32_MAX);
statement.bindIntTuple(placeHolder, placeHolder);
BOOST_LOG_TRIVIAL(debug)
<< " account = " << ripple::strHex(account)
<< " idx = " << seq << " tuple = " << placeHolder;
}
uint32_t adjustedLimit = limit - hashes.size();
statement.bindUInt(adjustedLimit);
@@ -457,6 +472,8 @@ CassandraBackend::fetchAccountTransactions(
BOOST_LOG_TRIVIAL(debug) << __func__ << " setting cursor";
auto [lgrSeq, txnIdx] = result.getInt64Tuple();
cursor = {(uint32_t)lgrSeq, (uint32_t)txnIdx};
if (forward)
++cursor->transactionIndex;
}
} while (result.nextRow());
}
@@ -464,9 +481,14 @@ CassandraBackend::fetchAccountTransactions(
{
BOOST_LOG_TRIVIAL(debug) << __func__ << " less than limit";
uint32_t seq = cursor->ledgerSequence;
seq = ((seq >> 20) - 1) << 20;
seq = seq >> 20;
if (forward)
seq += 1;
else
seq -= 1;
seq = seq << 20;
cursor->ledgerSequence = seq;
cursor->transactionIndex = INT32_MAX;
cursor->transactionIndex = forward ? 0 : INT32_MAX;
BOOST_LOG_TRIVIAL(debug) << __func__ << " walking back";
CassandraStatement statement{selectObject_};
statement.bindBytes(keylet.key);
@@ -1245,6 +1267,13 @@ CassandraBackend::open(bool readOnly)
<< " AND seq_idx < ? LIMIT ?";
if (!selectAccountTx_.prepareStatement(query, session_.get()))
continue;
query.str("");
query << " SELECT hash,seq_idx FROM " << tablePrefix << "account_tx"
<< " WHERE account = ? "
<< " AND idx = ? "
<< " AND seq_idx >= ? ORDER BY seq_idx ASC LIMIT ?";
if (!selectAccountTxForward_.prepareStatement(query, session_.get()))
continue;
query.str("");
query << " INSERT INTO " << tablePrefix << "ledgers "