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  package org.apache.cassandra.cql3;
  
  import org.junit.Test;
  
  import org.apache.cassandra.Util;
  import org.apache.cassandra.db.DecoratedKey;
  import org.apache.cassandra.db.PartitionPosition;
  import org.apache.cassandra.io.sstable.AbstractRowIndexEntry;
  import org.apache.cassandra.io.sstable.SSTableReadsListener;
  import org.apache.cassandra.io.sstable.format.ForwardingSSTableReader;
  import org.apache.cassandra.io.sstable.format.SSTableReader;
  import org.apache.cassandra.utils.ByteBufferUtil;
  
  public class QueryWithIndexedSSTableTest extends CQLTester
  {
      @Test
      public void queryIndexedSSTableTest() throws Throwable
      {
          // That test reproduces the bug from CASSANDRA-10903 and the fact we have a static column is
          // relevant to that reproduction in particular as it forces a slightly different code path that
          // if there wasn't a static.
  
          int ROWS = 1000;
          int VALUE_LENGTH = 100;
  
          createTable("CREATE TABLE %s (k int, t int, s text static, v text, PRIMARY KEY (k, t))");
  
          // We create a partition that is big enough that the underlying sstable will be indexed
          // For that, we use a large-ish number of row, and a value that isn't too small.
          String text = TombstonesWithIndexedSSTableTest.makeRandomString(VALUE_LENGTH);
          for (int i = 0; i < ROWS; i++)
              execute("INSERT INTO %s(k, t, v) VALUES (?, ?, ?)", 0, i, text + i);
  
          flush();
          compact();
  
          // Sanity check that we're testing what we want to test, that is that we're reading from an indexed
          // sstable. Note that we'll almost surely have a single indexed sstable in practice, but it's theorically
          // possible for a compact strategy to yield more than that and as long as one is indexed we're pretty
          // much testing what we want. If this check ever fails on some specific setting, we'll have to either
          // tweak ROWS and VALUE_LENGTH, or skip the test on those settings.
          DecoratedKey dk = Util.dk(ByteBufferUtil.bytes(0));
          boolean hasIndexed = false;
          for (SSTableReader sstable : getCurrentColumnFamilyStore().getLiveSSTables())
          {
              class IndexEntryAccessor extends ForwardingSSTableReader
              {
                  public IndexEntryAccessor(SSTableReader delegate)
                  {
                      super(delegate);
                  }
  
                  public AbstractRowIndexEntry getRowIndexEntry(PartitionPosition key, Operator op, boolean updateCacheAndStats, SSTableReadsListener listener)
                  {
                      return super.getRowIndexEntry(key, op, updateCacheAndStats, listener);
                  }
              }
  
              IndexEntryAccessor accessor = new IndexEntryAccessor(sstable);
              AbstractRowIndexEntry indexEntry = accessor.getRowIndexEntry(dk, SSTableReader.Operator.EQ, false, SSTableReadsListener.NOOP_LISTENER);
              hasIndexed |= indexEntry != null && indexEntry.isIndexed();
          }
          assert hasIndexed;
  
          assertRowCount(execute("SELECT s FROM %s WHERE k = ?", 0), ROWS);
          assertRowCount(execute("SELECT s FROM %s WHERE k = ? ORDER BY t DESC", 0), ROWS);
  
          assertRowCount(execute("SELECT DISTINCT s FROM %s WHERE k = ?", 0), 1);
          assertRowCount(execute("SELECT DISTINCT s FROM %s WHERE k = ? ORDER BY t DESC", 0), 1);
      }
  }
  