qgmPlMthMatcherScan::qgmPlMthMatcherScan( const qgmDbAttr &collection,
const qgmOPFieldVec &selector,
const bson::BSONObj &orderby,
const bson::BSONObj &hint,
INT64 numSkip,
INT64 numReturn,
const qgmField &alias,
const bson::BSONObj &matcher )
: _qgmPlScan( collection, selector, orderby, hint, numSkip, numReturn,
alias, NULL )
{
_condition = matcher.copy();
}
// PD_TRACE_DECLARE_FUNCTION ( SDB__MTHSELECTOR_SELECT, "_mthSelector::select" )
INT32 _mthSelector::select( const bson::BSONObj &source,
bson::BSONObj &target )
{
INT32 rc = SDB_OK ;
PD_TRACE_ENTRY( SDB__MTHSELECTOR_SELECT ) ;
SDB_ASSERT(_init, "The selector has not been initialized, please "
"call 'loadPattern' before using it" ) ;
BSONObj obj ;
if ( !_init )
{
target = source.copy() ;
goto done ;
}
rc = _matrix.select( source, obj ) ;
if ( SDB_OK != rc )
{
PD_LOG( PDERROR, "failed to select columns:%d", rc ) ;
goto error ;
}
if ( !_stringOutput )
{
target = obj ;
}
else
{
BSONObj resorted ;
rc = _resortObj( _matrix.getPattern(),
obj,
resorted ) ;
if ( SDB_OK != rc )
{
PD_LOG( PDERROR, "failed to resort obj:%d", rc ) ;
goto error ;
}
rc = _buildCSV( resorted, target ) ;
if ( SDB_OK != rc )
{
PD_LOG( PDERROR, "failed to build csv:%d", rc ) ;
goto error ;
}
}
done:
PD_TRACE_EXITRC( SDB__MTHSELECTOR_SELECT, rc ) ;
return rc ;
error:
goto done ;
}