bool Writer::BlockTableExists()
{
std::ostringstream oss;
std::string block_table_name = getOptions().getValueOrThrow<std::string>("block_table_name");
char szTable[OWNAME]= "";
oss << "select table_name from user_tables";
log()->get(logDEBUG) << "checking for " << block_table_name << " existence ... " ;
Statement statement = Statement(m_connection->CreateStatement(oss.str().c_str()));
// Because of OCIGDALErrorHandler, this is going to throw if there is a
// problem. When it does, the statement should go out of scope and
// be destroyed without leaking.
statement->Define(szTable);
statement->Execute();
log()->get(logDEBUG) << "checking ... " << szTable ;
bool bDidRead(true);
while (bDidRead)
{
log()->get(logDEBUG) << ", " << szTable;
if (boost::iequals(szTable, block_table_name))
{
log()->get(logDEBUG) << " -- '" << block_table_name << "' found." <<std::endl;
return true;
}
bDidRead = statement->Fetch();
}
log()->get(logDEBUG) << " -- '" << block_table_name << "' not found." << std::endl;
return false;
}
// Read a block (set of points) from the database.
bool OciReader::readOci(Statement stmt, BlockPtr block)
{
if (!block->fetched())
{
if (!stmt->Fetch())
{
m_atEnd = true;
return false;
}
block->setFetched();
}
// Read the points from the blob in the row.
readBlob(stmt, block);
XMLSchema *s = findSchema(stmt, block);
updateSchema(*s);
MetadataNode comp = s->getMetadata().findChild("compression");
m_compression = (comp.value() == "lazperf");
block->reset();
block->clearFetched();
return true;
}
