```
SELECT version();

┌─version()────┐
│ 21.10.1.8002 │
└──────────────┘

WITH lower('\RealVNC\WinVNC4 /v password') as CommandLine
SELECT 
    CommandLine,
    CommandLine LIKE '%\\\\realvnc\\\\winvnc4%password%' as t1,
    CommandLine LIKE '%\\\\realvnc\\\\winvnc4 %password%' as t2,
    CommandLine LIKE '%\\\\realvnc\\\\winvnc4%password' as t3,
    CommandLine LIKE '%\\\\realvnc\\\\winvnc4 %password' as t4,
    CommandLine LIKE '%realvnc%winvnc4%password%' as t5,
    CommandLine LIKE '%\\\\winvnc4%password%' as t6;

┌─CommandLine──────────────────┬─t1─┬─t2─┬─t3─┬─t4─┬─t5─┬─t6─┐
│ \realvnc\winvnc4 /v password │  0 │  1 │  1 │  1 │  1 │  1 │
└──────────────────────────────┴────┴────┴────┴────┴────┴────┘

1 rows in set. Elapsed: 0.001 sec. 
```

All should match.

http://sqlfiddle.com/#!9/73f0c6/2
for (size_t i = 0; i < size; ++i)
                    {
                        res[i] = revert
                            ^ regexp->getRE2()->Match(
                                  re2_st::StringPiece(reinterpret_cast<const char *>(&data[offset]), n),
                                  0,
                                  n,
                                  re2_st::RE2::UNANCHORED,
                                  nullptr,
                                  0);
                        offset += n;
                    }
                }
            }
            else
            {
                
                const UInt8 * begin = data.data();
                const UInt8 * pos = begin;
                const UInt8 * end = pos + data.size();
                size_t i = 0;
                const UInt8 * next_pos = begin;
                
                if (strstr_pattern.size() <= n)
                {
                    Searcher searcher(required_substring.data(), required_substring.size(), end - pos);
                    
                    while (pos < end && end != (pos = searcher.search(pos, end - pos)))
                    {