SQLite

  int rc = SQLITE_OK;
  int nCol = pCsr->pConfig->nCol;

  pCsr->rowid++;

  if( pTab->eType==FTS5_VOCAB_COL ){
    for(pCsr->iCol++; pCsr->iCol<nCol; pCsr->iCol++){
      if( pCsr->aDoc[pCsr->iCol] ) break;
    }
  }

  if( pTab->eType==FTS5_VOCAB_ROW || pCsr->iCol>=nCol ){
    if( sqlite3Fts5IterEof(pCsr->pIter) ){
      pCsr->bEof = 1;
    }else{

      assert( pTab->eType==FTS5_VOCAB_COL || pTab->eType==FTS5_VOCAB_ROW );
      while( rc==SQLITE_OK ){
        i64 dummy;
        const u8 *pPos; int nPos;   /* Position list */
        i64 iPos = 0;               /* 64-bit position read from poslist */
        int iOff = 0;               /* Current offset within position list */

        switch( pCsr->pConfig->eDetail ){
          case FTS5_DETAIL_FULL:
            rc = sqlite3Fts5IterPoslist(pCsr->pIter, 0, &pPos, &nPos, &dummy);
            if( rc==SQLITE_OK ){
              if( pTab->eType==FTS5_VOCAB_ROW ){
                while( 0==sqlite3Fts5PoslistNext64(pPos, nPos, &iOff, &iPos) ){
                  pCsr->aCnt[0]++;
                }
                pCsr->aDoc[0]++;
              }else{
                int iCol = -1;
                while( 0==sqlite3Fts5PoslistNext64(pPos, nPos, &iOff, &iPos) ){
                  int ii = FTS5_POS2COLUMN(iPos);
                  pCsr->aCnt[ii]++;
                  if( iCol!=ii ){
                    pCsr->aDoc[ii]++;
                    iCol = ii;
                  }
                }
              }
            }
            break;

          case FTS5_DETAIL_COLUMNS:
            if( pTab->eType==FTS5_VOCAB_ROW ){
              pCsr->aDoc[0]++;
            }else{
              Fts5Buffer buf = {0, 0, 0};
              rc = sqlite3Fts5IterPoslistBuffer(pCsr->pIter, &buf);
              if( rc==SQLITE_OK ){
                while( 0==sqlite3Fts5PoslistNext64(buf.p, buf.n, &iOff,&iPos) ){
                  assert_nc( iPos>=0 && iPos<nCol );
                  if( iPos<nCol ) pCsr->aDoc[iPos]++;
                }
              }
              sqlite3Fts5BufferFree(&buf);
            }
            break;

          default: 
            assert( pCsr->pConfig->eDetail==FTS5_DETAIL_NONE );
            pCsr->aDoc[0]++;
            break;
        }

        if( rc==SQLITE_OK ){
          rc = sqlite3Fts5IterNextScan(pCsr->pIter);
        }

        if( rc==SQLITE_OK ){
          zTerm = sqlite3Fts5IterTerm(pCsr->pIter, &nTerm);
          if( nTerm!=pCsr->term.n || memcmp(zTerm, pCsr->term.p, nTerm) ){
            break;
          }
          if( sqlite3Fts5IterEof(pCsr->pIter) ) break;
        }
      }
    }
  }

  if( pCsr->bEof==0 && pTab->eType==FTS5_VOCAB_COL ){
    while( pCsr->aDoc[pCsr->iCol]==0 ) pCsr->iCol++;
    assert( pCsr->iCol<pCsr->pConfig->nCol );
  }
  return rc;
}

/*
** This is the xFilter implementation for the virtual table.

static int fts5VocabColumnMethod(
  sqlite3_vtab_cursor *pCursor,   /* Cursor to retrieve value from */
  sqlite3_context *pCtx,          /* Context for sqlite3_result_xxx() calls */
  int iCol                        /* Index of column to read value from */
){
  Fts5VocabCursor *pCsr = (Fts5VocabCursor*)pCursor;
  int eDetail = pCsr->pConfig->eDetail;
  int eType = ((Fts5VocabTable*)(pCursor->pVtab))->eType;
  i64 iVal = 0;

  if( iCol==0 ){
    sqlite3_result_text(
        pCtx, (const char*)pCsr->term.p, pCsr->term.n, SQLITE_TRANSIENT
    );

  }else if( eType==FTS5_VOCAB_COL ){
    assert( iCol==1 || iCol==2 || iCol==3 );
    if( iCol==1 ){
      if( eDetail!=FTS5_DETAIL_NONE ){
        const char *z = pCsr->pConfig->azCol[pCsr->iCol];
        sqlite3_result_text(pCtx, z, -1, SQLITE_STATIC);
      }
    }else if( iCol==2 ){
      iVal = pCsr->aDoc[pCsr->iCol];
    }else{
      iVal = pCsr->aCnt[pCsr->iCol];
    }
  }else{
    assert( iCol==1 || iCol==2 );
    if( iCol==1 ){
      iVal = pCsr->aDoc[0];
    }else{
      iVal = pCsr->aCnt[0];
    }
  }

  if( iVal>0 ) sqlite3_result_int64(pCtx, iVal);
  return SQLITE_OK;
}

/* 
** This is the xRowid method. The SQLite core calls this routine to
** retrieve the rowid for the current row of the result set. The
** rowid should be written to *pRowid.

# If SQLITE_ENABLE_FTS5 is defined, omit this file.
ifcapable !fts5 {
  finish_test
  return
}

foreach_detail_mode $testprefix {

if {[detail_is_none]} continue

proc null_list_entries {iFirst nInterval L} {
  for {set i $iFirst} {$i < [llength $L]} {incr i $nInterval} {
    lset L $i {}
  }
  return $L
}

proc null_insert {iFirst nInterval L} {
  for {set i $iFirst} {$i < [llength $L]} {incr i $nInterval} {
    lset L $i {}
  }
  return $L
}

proc star_from_row {L} {
  if {[detail_is_full]==0} {
    set L [null_list_entries 2 3 $L]
  }
  return $L
}

proc star_from_col {L} {
  if {[detail_is_col]} {
    set L [null_list_entries 3 4 $L]
  }
  if {[detail_is_none]} {
    set L [null_list_entries 1 4 $L]
    set L [null_list_entries 3 4 $L]
  }
  return $L
}

do_execsql_test 1.1.1 {
  CREATE VIRTUAL TABLE t1 USING fts5(one, prefix=1, detail=%DETAIL%);
  CREATE VIRTUAL TABLE v1 USING fts5vocab(t1, 'row');
  PRAGMA table_info = v1;
} {
  0 term {} 0 {} 0
  1 doc {} 0 {} 0
  2 cnt {} 0 {} 0
}

do_execsql_test 1.3 {
  INSERT INTO t1 VALUES('x y z');
  INSERT INTO t1 VALUES('x x x');
}

do_execsql_test 1.4.1 {
  SELECT * FROM v1;
} [star_from_row {x 2 4  y 1 1  z 1 1}]

do_execsql_test 1.4.2 {
  SELECT * FROM v2;
} [star_from_col {x one 2 4  y one 1 1  z one 1 1}]

do_execsql_test 1.5.1 {
  BEGIN;
    INSERT INTO t1 VALUES('a b c');
    SELECT * FROM v1 WHERE term<'d';
} [star_from_row {a 1 1   b 1 1   c 1 1}]

do_execsql_test 1.5.2 {
    SELECT * FROM v2 WHERE term<'d';
  COMMIT;
} [star_from_col {a one 1 1  b one 1 1  c one 1 1}]

do_execsql_test 1.6 {
  DELETE FROM t1 WHERE one = 'a b c';
  SELECT * FROM v1;
} [star_from_row {x 2 4  y 1 1  z 1 1}]

#-------------------------------------------------------------------------
#
do_execsql_test 2.0 {
  CREATE VIRTUAL TABLE tt USING fts5(a, b, detail=%DETAIL%);
  INSERT INTO tt VALUES('d g b f d f', 'f c e c d a');
  INSERT INTO tt VALUES('f a e a a b', 'e d c f d d');
  INSERT INTO tt VALUES('b c a a a b', 'f f c c b c');
  INSERT INTO tt VALUES('f d c a c e', 'd g d e g d');
  INSERT INTO tt VALUES('g d e f a g x', 'f f d a a b');
  INSERT INTO tt VALUES('g c f b c g', 'a g f d c b');
  INSERT INTO tt VALUES('c e c f g b', 'f e d b g a');
  INSERT INTO tt VALUES('g d e f d e', 'a c d b a g');
  INSERT INTO tt VALUES('e f a c c b', 'b f e a f d y');
  INSERT INTO tt VALUES('c c a a c f', 'd g a e b g');
}

set res_row [star_from_row {
  a 10 20   b 9 14   c 9 20   d 9 19   
  e 8 13   f 10 20   g 7 14   x 1 1   
  y 1 1
}]
set res_col [star_from_col {
  a a 6 11    a b 7 9
  b a 6 7     b b 7 7 
  c a 6 12    c b 5 8 
  d a 4 6     d b 9 13 
  e a 6 7     e b 6 6 
  f a 9 10    f b 7 10 
  g a 5 7     g b 5 7
  x a 1 1     y b 1 1
}]






foreach {tn tbl resname} {
  1 "fts5vocab(tt, 'col')" res_col
  2 "fts5vocab(tt, 'row')" res_row
  3 "fts5vocab(tt, \"row\")" res_row
  4 "fts5vocab(tt, [row])" res_row
  5 "fts5vocab(tt, `row`)" res_row

#-------------------------------------------------------------------------
# Test fts5vocab tables created in the temp schema. 
#
reset_db
forcedelete test.db2
do_execsql_test 5.0 {
  ATTACH 'test.db2' AS aux;
  CREATE VIRTUAL TABLE t1 USING fts5(x, detail=%DETAIL%);
  CREATE VIRTUAL TABLE temp.t1 USING fts5(x, detail=%DETAIL%);
  CREATE VIRTUAL TABLE aux.t1 USING fts5(x, detail=%DETAIL%);

  INSERT INTO main.t1 VALUES('a b c');
  INSERT INTO main.t1 VALUES('d e f');
  INSERT INTO main.t1 VALUES('a e c');

  INSERT INTO temp.t1 VALUES('1 2 3');
  INSERT INTO temp.t1 VALUES('4 5 6');

do_execsql_test 5.1 {
  CREATE VIRTUAL TABLE temp.vm  USING fts5vocab(main, t1, row);
  CREATE VIRTUAL TABLE temp.vt1 USING fts5vocab(t1, row);
  CREATE VIRTUAL TABLE temp.vt2 USING fts5vocab(temp, t1, row);
  CREATE VIRTUAL TABLE temp.va  USING fts5vocab(aux, t1, row);
}

do_execsql_test 5.2 { SELECT * FROM vm } [star_from_row {
  a 2 2 b 1 1 c 2 2 d 1 1 e 2 2 f 1 1
}]
do_execsql_test 5.3 { SELECT * FROM vt1 } [star_from_row {
  1 2 2 2 1 1 3 2 2 4 1 1 5 2 2 6 1 1
}]
do_execsql_test 5.4 { SELECT * FROM vt2 } [star_from_row {
  1 2 2 2 1 1 3 2 2 4 1 1 5 2 2 6 1 1
}]
do_execsql_test 5.5 { SELECT * FROM va } [star_from_row {
  m 1 1 n 2 2 o 1 1 x 2 2 y 1 1 z 2 2
}]

#-------------------------------------------------------------------------
#
do_execsql_test 6.0 {
  CREATE TABLE iii(iii);
  CREATE TABLE jjj(x);
}

} {1 {no such fts5 table: main.lll}}

#-------------------------------------------------------------------------
# Test single term queries on fts5vocab tables (i.e. those with term=?
# constraints in the WHERE clause).
#
do_execsql_test 7.0 {
  CREATE VIRTUAL TABLE tx USING fts5(one, two, detail=%DETAIL%);
  INSERT INTO tx VALUES('g a ggg g a b eee',      'cc d aa ff g ee');
  INSERT INTO tx VALUES('dd fff i a i jjj',       'f fff hh jj e f');
  INSERT INTO tx VALUES('ggg a f f fff dd aa',    'd ggg f f j gg ddd');
  INSERT INTO tx VALUES('e bb h jjj ii gg',       'e aa e f c fff');
  INSERT INTO tx VALUES('j ff aa a h',            'h a j bbb bb');
  INSERT INTO tx VALUES('cc i ff c d f',          'dd ii fff f c cc d');
  INSERT INTO tx VALUES('jjj g i bb cc eee',      'hhh iii aaa b bbb aaa');

  set r2 [db eval {
    SELECT $term, 'two', sum(cont(two, $term)>0), sum(cont(two, $term)) FROM tx
  }]
  if {[lindex $r2 2]==0} {set r2 [list]}

  set resc [concat $r1 $r2]

  set resc [star_from_col $resc]
  set resr [star_from_row $resr]
  do_execsql_test 7.$term.1 {SELECT * FROM txc WHERE term=$term} $resc
  do_execsql_test 7.$term.2 {SELECT * FROM txr WHERE term=$term} $resr
}

do_execsql_test 7.1 {
  CREATE TABLE txr_c AS SELECT * FROM txr;
  CREATE TABLE txc_c AS SELECT * FROM txc;

  SELECT count(*) FROM txr, txr_c WHERE txr.term = txr_c.term;
} {30}

do_execsql_test 7.3.2 {
  SELECT count(*) FROM txc, txc_c 
  WHERE txc.term = txc_c.term AND txc.col=txc_c.col;
} {57}

}

finish_test