question: @ Override public long position ( byte [ ] pattern , long start ) throws SQLException { if ( isDebugEnabled ( ) ) { debugCode ( "position(" + quoteBytes ( pattern ) + ", " + start + ");" ) ; } if ( Constants . BLOB_SEARCH ) { try { checkClosed ( ) ; if ( pattern == null ) { return - 1 ; } if ( pattern . length == 0 ) { return 1 ; } BufferedInputStream in = new BufferedInputStream ( value . getInputStream ( ) ) ; IOUtils . skipFully ( in , start - 1 ) ; int pos = 0 ; int patternPos = 0 ; while ( true ) { int x = in . read ( ) ; if ( x < 0 ) { break ; } if ( x == ( pattern [ patternPos ] & 0xff ) ) { if ( patternPos == 0 ) { in . mark ( pattern . length ) ; } if ( patternPos == pattern . length ) { return pos - patternPos ; } patternPos ++ ; } else { if ( patternPos > 0 ) { in . reset ( ) ; pos -= patternPos ; } } pos ++ ; } return - 1 ; } catch ( Exception e ) { throw logAndConvert ( e ) ; } } throw unsupported ( "LOB search" ) ; }
target:  [Not supported] Searches a pattern and return the position.