BDB library utilities
[BDB]

Collaboration diagram for BDB library utilities:

Functions
template<class FL, class Func>
void	BDB_iterate_file (FL &dbf, Func &func)
	Template algorithm function to iterate the BDB File.
template<class FL, class IT, class Func>
void	BDB_iterate_file (FL &dbf, IT start, IT finish, Func &func)
	Iterate file following the sequence of ids BDB file should have an integer key.
template<class IT, class Lock>
void	BDB_batch_delete_recs (CBDB_File &dbf, IT start, IT finish, unsigned batch_size, Lock *locker)
	Delete file records based on sequence of ids.
CBDB_File::TUnifiedFieldIndex	BDB_find_field (const CBDB_File &dbf, const CBoyerMooreMatcher &matcher, string *tmp_str_buffer=0)
	Find index of field containing the specified value Search condition is specified by CBoyerMooreMatcher By default search is performed in string fields, but if tmp_str_buffer is specified function will try to convert non-strings(int, float) and search in there.
int	BDB_get_rowid (const CBDB_File &dbf)
	Return record id (integer key).

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Function Documentation

template<class IT, class Lock> void BDB_batch_delete_recs (  CBDB_File &  dbf, IT  start, IT  finish, unsigned  batch_size, Lock *  locker )

Delete file records based on sequence of ids. Records are getting deleted in batches (one transaction per batch) We need batches not to overflow transaction log and not to lock the file for a long time (to allow concurrent access) Definition at line 89 of file bdb_util.hpp. References _ASSERT, CBDB_File::Delete(), CBDB_RawFile::eIgnoreError, CBDB_Transaction::eTransASync, CBDB_BufferManager::FieldCount(), CBDB_RawFile::GetEnv(), CBDB_BufferManager::GetField(), CBDB_File::GetKeyBuffer(), ITERATE, and CBDB_RawFile::SetTransaction().

CBDB_File::TUnifiedFieldIndex BDB_find_field (  const CBDB_File &  dbf, const CBoyerMooreMatcher &  matcher, string *  tmp_str_buffer = 0 )

Find index of field containing the specified value Search condition is specified by CBoyerMooreMatcher By default search is performed in string fields, but if tmp_str_buffer is specified function will try to convert non-strings(int, float) and search in there. Parameters: dbf  Database to search in. Should be positioned on some record by Fetch or another method matcher  Search condition substring matcher tmp_str_buffer  Temporary string used for search in non-text fields Returns: 0 if value not found Definition at line 114 of file bdb_util.cpp. References BDB_find_field(), BDB_GetUFieldIdx(), CBDB_File::GetDataBuffer(), and CBDB_File::GetKeyBuffer(). Referenced by BDB_find_field(), CScannerFunctorArgN::IsAnyField(), and CScannerEvaluateFunc::operator()().

int BDB_get_rowid (  const CBDB_File &  dbf  )

Return record id (integer key). Returns: record integer key or 0 if it cannot be retrived Definition at line 145 of file bdb_util.cpp. References fi, CBDB_FieldInt2::Get(), CBDB_FieldInt4::Get(), CBDB_FieldUint4::Get(), CBDB_BufferManager::GetField(), and CBDB_File::GetKeyBuffer(). Referenced by CLDS_IdTableScanner::OnRecordFound().

template<class FL, class IT, class Func> void BDB_iterate_file (  FL &  dbf, IT  start, IT  finish, Func &  func )

Iterate file following the sequence of ids BDB file should have an integer key. Definition at line 66 of file bdb_util.hpp. References _ASSERT, eBDB_Ok, CBDB_BufferManager::FieldCount(), CBDB_BufferManager::GetField(), and IBDB_FieldConvert::SetInt().

template<class FL, class Func> void BDB_iterate_file (  FL &  dbf, Func &  func )

Template algorithm function to iterate the BDB File. Func() is called for every dbf record. Definition at line 53 of file bdb_util.hpp. References eBDB_Ok, CBDB_FileCursor::eFirst, CBDB_FileCursor::Fetch(), and CBDB_FileCursor::SetCondition(). Referenced by CLDS_Object::BuildSeqIdIdx(), CLDS_Query::CSequenceFinder::FindInCandidates(), CLDS_Query::FindSeqIdList(), and CLDS_DataLoader::GetRecords().

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