int sqlite3Fts5ExprInit(Fts5Global*, sqlite3*);

int sqlite3Fts5ExprPhraseCount(Fts5Expr*);
int sqlite3Fts5ExprPhraseSize(Fts5Expr*, int iPhrase);
int sqlite3Fts5ExprPoslist(Fts5Expr*, int, const u8 **);

typedef struct Fts5PoslistPopulator Fts5PoslistPopulator;
Fts5PoslistPopulator *sqlite3Fts5ExprClearPoslists(Fts5Expr*);
int sqlite3Fts5ExprPopulatePoslists(
    Fts5Config*, Fts5Expr*, Fts5PoslistPopulator*, int, const char*, int
);
void sqlite3Fts5ExprCheckPoslists(Fts5Expr*, i64);


int sqlite3Fts5ExprClonePhrase(Fts5Config*, Fts5Expr*, int, Fts5Expr**);

int sqlite3Fts5ExprPhraseCollist(Fts5Expr *, int, const u8 **, int *);

/*******************************************
** The fts5_expr.c API above this point is used by the other hand-written

int sqlite3Fts5ExprInit(Fts5Global*, sqlite3*);

int sqlite3Fts5ExprPhraseCount(Fts5Expr*);
int sqlite3Fts5ExprPhraseSize(Fts5Expr*, int iPhrase);
int sqlite3Fts5ExprPoslist(Fts5Expr*, int, const u8 **);

typedef struct Fts5PoslistPopulator Fts5PoslistPopulator;
Fts5PoslistPopulator *sqlite3Fts5ExprClearPoslists(Fts5Expr*, int);
int sqlite3Fts5ExprPopulatePoslists(
    Fts5Config*, Fts5Expr*, Fts5PoslistPopulator*, int, const char*, int
);
void sqlite3Fts5ExprCheckPoslists(Fts5Expr*, i64);
void sqlite3Fts5ExprClearEof(Fts5Expr*);

int sqlite3Fts5ExprClonePhrase(Fts5Config*, Fts5Expr*, int, Fts5Expr**);

int sqlite3Fts5ExprPhraseCollist(Fts5Expr *, int, const u8 **, int *);

/*******************************************
** The fts5_expr.c API above this point is used by the other hand-written

          }
          assert( rc!=SQLITE_OK || cmp<=0 );
          if( cmp || p2->bNomatch ) break;
          rc = fts5ExprNodeNext(pExpr, p1, 0, 0);
        }
        pNode->bEof = p1->bEof;
        pNode->iRowid = p1->iRowid;



        break;
      }
    }
  }
  return rc;
}

................................................................................
  }
  return nRet;
}

struct Fts5PoslistPopulator {
  Fts5PoslistWriter writer;
  int bOk;                        /* True if ok to populate */

};

Fts5PoslistPopulator *sqlite3Fts5ExprClearPoslists(Fts5Expr *pExpr){
  Fts5PoslistPopulator *pRet;
  pRet = sqlite3_malloc(sizeof(Fts5PoslistPopulator)*pExpr->nPhrase);
  if( pRet ){
    int i;
    memset(pRet, 0, sizeof(Fts5PoslistPopulator)*pExpr->nPhrase);
    for(i=0; i<pExpr->nPhrase; i++){
      Fts5Buffer *pBuf = &pExpr->apExprPhrase[i]->poslist;

      assert( pExpr->apExprPhrase[i]->nTerm==1 );





      pBuf->n = 0;

    }
  }
  return pRet;
}

struct Fts5ExprCtx {
  Fts5Expr *pExpr;
................................................................................
  int i;
  Fts5ExprCtx sCtx;
  sCtx.pExpr = pExpr;
  sCtx.aPopulator = aPopulator;
  sCtx.iOff = (((i64)iCol) << 32) - 1;

  for(i=0; i<pExpr->nPhrase; i++){
    Fts5Colset *pColset = pExpr->apExprPhrase[i]->pNode->pNear->pColset;

    if( pColset && 0==fts5ExprColsetTest(pColset, iCol) ){


      aPopulator[i].bOk = 0;
    }else{
      aPopulator[i].bOk = 1;
    }
  }

  return sqlite3Fts5Tokenize(pConfig, 
................................................................................
          return 0;
        }
        return 1;
      }
    }
  }
}

void sqlite3Fts5ExprCheckPoslists(Fts5Expr *pExpr, i64 iRowid){
  fts5ExprCheckPoslists(pExpr->pRoot, iRowid);
}












/*
** This function is only called for detail=columns tables. 
*/
int sqlite3Fts5ExprPhraseCollist(
  Fts5Expr *pExpr, 
  int iPhrase, 

          }
          assert( rc!=SQLITE_OK || cmp<=0 );
          if( cmp || p2->bNomatch ) break;
          rc = fts5ExprNodeNext(pExpr, p1, 0, 0);
        }
        pNode->bEof = p1->bEof;
        pNode->iRowid = p1->iRowid;
        if( p1->bEof ){
          fts5ExprNodeZeroPoslist(p2);
        }
        break;
      }
    }
  }
  return rc;
}

................................................................................
  }
  return nRet;
}

struct Fts5PoslistPopulator {
  Fts5PoslistWriter writer;
  int bOk;                        /* True if ok to populate */
  int bMiss;
};

Fts5PoslistPopulator *sqlite3Fts5ExprClearPoslists(Fts5Expr *pExpr, int bLive){
  Fts5PoslistPopulator *pRet;
  pRet = sqlite3_malloc(sizeof(Fts5PoslistPopulator)*pExpr->nPhrase);
  if( pRet ){
    int i;
    memset(pRet, 0, sizeof(Fts5PoslistPopulator)*pExpr->nPhrase);
    for(i=0; i<pExpr->nPhrase; i++){
      Fts5Buffer *pBuf = &pExpr->apExprPhrase[i]->poslist;
      Fts5ExprNode *pNode = pExpr->apExprPhrase[i]->pNode;
      assert( pExpr->apExprPhrase[i]->nTerm==1 );
      if( bLive && 
          (pBuf->n==0 || pNode->iRowid!=pExpr->pRoot->iRowid || pNode->bEof)
      ){
        pRet[i].bMiss = 1;
      }else{
        pBuf->n = 0;
      }
    }
  }
  return pRet;
}

struct Fts5ExprCtx {
  Fts5Expr *pExpr;
................................................................................
  int i;
  Fts5ExprCtx sCtx;
  sCtx.pExpr = pExpr;
  sCtx.aPopulator = aPopulator;
  sCtx.iOff = (((i64)iCol) << 32) - 1;

  for(i=0; i<pExpr->nPhrase; i++){
    Fts5ExprNode *pNode = pExpr->apExprPhrase[i]->pNode;
    Fts5Colset *pColset = pNode->pNear->pColset;
    if( (pColset && 0==fts5ExprColsetTest(pColset, iCol)) 
     || aPopulator[i].bMiss
    ){
      aPopulator[i].bOk = 0;
    }else{
      aPopulator[i].bOk = 1;
    }
  }

  return sqlite3Fts5Tokenize(pConfig, 
................................................................................
          return 0;
        }
        return 1;
      }
    }
  }
}

void sqlite3Fts5ExprCheckPoslists(Fts5Expr *pExpr, i64 iRowid){
  fts5ExprCheckPoslists(pExpr->pRoot, iRowid);
}

static void fts5ExprClearEof(Fts5ExprNode *pNode){
  int i;
  for(i=0; i<pNode->nChild; i++){
    fts5ExprClearEof(pNode->apChild[i]);
  }
  pNode->bEof = 0;
}
void sqlite3Fts5ExprClearEof(Fts5Expr *pExpr){
  fts5ExprClearEof(pExpr->pRoot);
}

/*
** This function is only called for detail=columns tables. 
*/
int sqlite3Fts5ExprPhraseCollist(
  Fts5Expr *pExpr, 
  int iPhrase, 

    assert( pRowidEq==0 && pRowidLe==0 && pRowidGe==0 && pRank==0 );
    assert( nVal==0 && pMatch==0 && bOrderByRank==0 && bDesc==0 );
    assert( pCsr->iLastRowid==LARGEST_INT64 );
    assert( pCsr->iFirstRowid==SMALLEST_INT64 );
    pCsr->ePlan = FTS5_PLAN_SOURCE;
    pCsr->pExpr = pTab->pSortCsr->pExpr;
    rc = fts5CursorFirst(pTab, pCsr, bDesc);

  }else if( pMatch ){
    const char *zExpr = (const char*)sqlite3_value_text(apVal[0]);
    if( zExpr==0 ) zExpr = "";

    rc = fts5CursorParseRank(pConfig, pCsr, pRank);
    if( rc==SQLITE_OK ){
      if( zExpr[0]=='*' ){
................................................................................
  Fts5Cursor *pCsr, 
  int iPhrase, 
  const u8 **pa,
  int *pn
){
  Fts5Config *pConfig = ((Fts5Table*)(pCsr->base.pVtab))->pConfig;
  int rc = SQLITE_OK;


  if( CsrFlagTest(pCsr, FTS5CSR_REQUIRE_POSLIST) ){

    if( pConfig->eDetail!=FTS5_DETAIL_FULL ){
      Fts5PoslistPopulator *aPopulator;
      int i;
      aPopulator = sqlite3Fts5ExprClearPoslists(pCsr->pExpr);
      if( aPopulator==0 ) rc = SQLITE_NOMEM;
      for(i=0; i<pConfig->nCol && rc==SQLITE_OK; i++){
        int n; const char *z;
        rc = fts5ApiColumnText((Fts5Context*)pCsr, i, &z, &n);
        if( rc==SQLITE_OK ){
          rc = sqlite3Fts5ExprPopulatePoslists(
              pConfig, pCsr->pExpr, aPopulator, i, z, n
          );
        }
      }
      sqlite3_free(aPopulator);

      if( pCsr->pSorter ){
        sqlite3Fts5ExprCheckPoslists(pCsr->pExpr, pCsr->pSorter->iRowid);
      }
    }
    CsrFlagClear(pCsr, FTS5CSR_REQUIRE_POSLIST);
  }

    assert( pRowidEq==0 && pRowidLe==0 && pRowidGe==0 && pRank==0 );
    assert( nVal==0 && pMatch==0 && bOrderByRank==0 && bDesc==0 );
    assert( pCsr->iLastRowid==LARGEST_INT64 );
    assert( pCsr->iFirstRowid==SMALLEST_INT64 );
    pCsr->ePlan = FTS5_PLAN_SOURCE;
    pCsr->pExpr = pTab->pSortCsr->pExpr;
    rc = fts5CursorFirst(pTab, pCsr, bDesc);
    sqlite3Fts5ExprClearEof(pCsr->pExpr);
  }else if( pMatch ){
    const char *zExpr = (const char*)sqlite3_value_text(apVal[0]);
    if( zExpr==0 ) zExpr = "";

    rc = fts5CursorParseRank(pConfig, pCsr, pRank);
    if( rc==SQLITE_OK ){
      if( zExpr[0]=='*' ){
................................................................................
  Fts5Cursor *pCsr, 
  int iPhrase, 
  const u8 **pa,
  int *pn
){
  Fts5Config *pConfig = ((Fts5Table*)(pCsr->base.pVtab))->pConfig;
  int rc = SQLITE_OK;
  int bLive = (pCsr->pSorter==0);

  if( CsrFlagTest(pCsr, FTS5CSR_REQUIRE_POSLIST) ){

    if( pConfig->eDetail!=FTS5_DETAIL_FULL ){
      Fts5PoslistPopulator *aPopulator;
      int i;
      aPopulator = sqlite3Fts5ExprClearPoslists(pCsr->pExpr, bLive);
      if( aPopulator==0 ) rc = SQLITE_NOMEM;
      for(i=0; i<pConfig->nCol && rc==SQLITE_OK; i++){
        int n; const char *z;
        rc = fts5ApiColumnText((Fts5Context*)pCsr, i, &z, &n);
        if( rc==SQLITE_OK ){
          rc = sqlite3Fts5ExprPopulatePoslists(
              pConfig, pCsr->pExpr, aPopulator, i, z, n
          );
        }
      }
      sqlite3_free(aPopulator);

      if( pCsr->pSorter ){
        sqlite3Fts5ExprCheckPoslists(pCsr->pExpr, pCsr->pSorter->iRowid);
      }
    }
    CsrFlagClear(pCsr, FTS5CSR_REQUIRE_POSLIST);
  }

  }
}
proc detail_is_none {} { detail_check ; expr {$::detail == "none"} }
proc detail_is_col {}  { detail_check ; expr {$::detail == "col" } }
proc detail_is_full {} { detail_check ; expr {$::detail == "full"} }

  }
}
proc detail_is_none {} { detail_check ; expr {$::detail == "none"} }
proc detail_is_col {}  { detail_check ; expr {$::detail == "col" } }
proc detail_is_full {} { detail_check ; expr {$::detail == "full"} }


#-------------------------------------------------------------------------
# Convert a poslist of the type returned by fts5_test_poslist() to a 
# collist as returned by fts5_test_collist().
#
proc fts5_poslist2collist {poslist} {
  set res [list]
  foreach h $poslist {
    regexp {(.*)\.[1234567890]+} $h -> cand
    lappend res $cand
  }
  set res [lsort -command fts5_collist_elem_compare -unique $res]
  return $res
}

# Comparison function used by fts5_poslist2collist to sort collist entries.
#
proc fts5_collist_elem_compare {a b} {
  foreach {a1 a2} [split $a .] {}
  foreach {b1 b2} [split $b .] {}

  if {$a1==$b1} { return [expr $a2 - $b2] }
  return [expr $a1 - $b1]
}


#--------------------------------------------------------------------------
# Construct and return a tcl list equivalent to that returned by the SQL
# query executed against database handle [db]:
#
#   SELECT 
#     rowid, 
#     fts5_test_poslist($tbl),
#     fts5_test_collist($tbl) 
#   FROM $tbl('$expr')
#   ORDER BY rowid $order;
#
proc fts5_query_data {expr tbl {order ASC}} {

  # Figure out the set of columns in the FTS5 table. This routine does
  # not handle tables with UNINDEXED columns, but if it did, it would
  # have to be here.
  db eval "PRAGMA table_info = $tbl" x { lappend lCols $x(name) }

  set cols ""
  foreach e $lCols { append cols ", '$e'" }
  set tclexpr [db one [subst -novar {
    SELECT fts5_expr_tcl( $expr, 'nearset $cols -pc ::pc' [set cols] )
  }]]

  set res [list]
  db eval "SELECT rowid, * FROM $tbl ORDER BY rowid $order" x {
    set cols [list]
    foreach col $lCols { lappend cols $x($col) }
    
    set ::pc 0
    set rowdata [eval $tclexpr]
    if {$rowdata != ""} { 
      lappend res $x(rowid) $rowdata [fts5_poslist2collist $rowdata]
    }
  }

  set res
}

#-------------------------------------------------------------------------
# Similar to [fts5_query_data], but omit the collist field.
#
proc fts5_poslist_data {expr tbl {order ASC}} {
  set res [list]
  foreach {rowid poslist collist} [fts5_query_data $expr $tbl $order] {
    lappend res $rowid $poslist
  }
  set res
}

#-------------------------------------------------------------------------
#
proc nearset_rf {aCol args} {
  set idx [lsearch -exact $args --]
  if {$idx != [llength $args]-2 || [llength [lindex $args end]]!=1} {
    set ::expr_not_ok 1
  }
  list
}

proc nearset_rc {aCol args} {
  nearset_rf $aCol {*}$args
  if {[lsearch $args -col]>=0} { 
    set ::expr_not_ok 1
  }
  list
}

proc fts5_expr_ok {expr tbl} {

  if {![detail_is_full]} {
    set nearset "nearset_rc"
    if {[detail_is_col]} { set nearset "nearset_rf" }

    set ::expr_not_ok 0
    db eval "PRAGMA table_info = $tbl" x { lappend lCols $x(name) }

    set cols ""
    foreach e $lCols { append cols ", '$e'" }
    set ::pc 0
    set tclexpr [db one [subst -novar {
      SELECT fts5_expr_tcl( $expr, '[set nearset] $cols -pc ::pc' [set cols] )
    }]]
    eval $tclexpr
    if {$::expr_not_ok} { return 0 }
  }

  return 1
}

# End of test code
#-------------------------------------------------------------------------

foreach {tn2 sql} {
  1  {}
  2  {BEGIN}
} {

  reset_db
  fts5_aux_test_functions db

  do_execsql_test 1.$tn2.0 {
    CREATE VIRTUAL TABLE xx USING fts5(x,y, detail=%DETAIL%);
    INSERT INTO xx(xx, rank) VALUES('pgsz', 32);
  }
................................................................................
  do_test 1.$tn2.1.1 {
    foreach {id x y} $data {
      execsql { INSERT INTO xx(rowid, x, y) VALUES($id, $x, $y) }
    }
    execsql { INSERT INTO xx(xx) VALUES('integrity-check') }
  } {}


  #-------------------------------------------------------------------------
  # The following work with all detail= modes.
  #






  foreach {tn expr} {
    1 "a   AND b"
    2 "a   OR b"
    3 "o"
    4 "b q"
    5 "e a e"
    6 "m d g q q b k b w f q q p p"
    7 "l o o l v v k"
    8 "a"
    9 "b"
    10 "c"
    11 "no"
    12 "L O O L V V K"
    13 "a AND b AND c"
  } {
    set res [poslist_data 1 $expr]
    do_execsql_test 1.$tn2.1.$tn.p.[llength $res] { 
      SELECT rowid, fts5_test_poslist(xx) FROM xx WHERE xx match $expr
    } $res

    set res [collist_data $expr]
    do_execsql_test 1.$tn2.1.$tn.c.[llength $res] { 
      SELECT rowid, fts5_test_collist(xx) FROM xx WHERE xx match $expr
    } $res
  }

  if {[detail_is_none]} continue

  #-------------------------------------------------------------------------
  # Queries on a specific column.
  #
  foreach {tn expr} {
    1.1 "x:a"
    1.2 "y:a"
    1.3 "x:b"
    1.4 "y:b"

    2.1 "{x}:a"
    2.2 "{y}:a"
    2.3 "{x}:b"
    2.4 "{y}:b"

    3.1 "{x y}:a"
    3.2 "{y x}:a"
    3.3 "{x x}:b"
    3.4 "{y y}:b"

    4.1 {{"x" "y"}:a}
    4.2 {{"y" x}:a}
    4.3 {{x "x"}:b}
    4.4 {{"y" y}:b}
  } {
    set res [poslist_data 1 $expr]
    do_execsql_test 1.$tn2.4.$tn.p.[llength $res] { 
      SELECT rowid, fts5_test_poslist(xx) FROM xx WHERE xx match $expr
    } $res

    set res [collist_data $expr]
    do_execsql_test 1.$tn2.4.$tn.c.[llength $res] { 
      SELECT rowid, fts5_test_collist(xx) FROM xx WHERE xx match $expr
    } $res
  }

  if {[detail_is_col]} continue

  #-------------------------------------------------------------------------
  # Test phrase queries.
  #
  foreach {tn expr} {
    1 "b + q"
    2 "e + a + e"
    3 "m + d + g + q + q + b + k + b + w + f + q + q + p + p"
    4 "l + o + o + l + v + v + k"
    5 "L + O + O + L + V + V + K"
  } {
    set res [poslist_data 1 $expr]

    do_execsql_test 1.$tn2.2.$tn.p.[llength $res] { 
      SELECT rowid, fts5_test_poslist(xx) FROM xx WHERE xx match $expr
    } $res

    set res [collist_data $expr]
    do_execsql_test 1.$tn2.2.$tn.c.[llength $res] { 
      SELECT rowid, fts5_test_collist(xx) FROM xx WHERE xx match $expr
    } $res
  }

  #-------------------------------------------------------------------------
  # Test some AND and OR queries.
  #
  foreach {tn expr} {
    1.1 "a+b AND c"
    1.2 "d+c AND u"
    1.3 "d+c AND u+d"

    2.1 "a+b OR c"
    2.2 "d+c OR u"
    2.3 "d+c OR u+d"
  } {
    set res [poslist_data 1 $expr]
    do_execsql_test 1.$tn2.3.$tn.c.[llength $res] { 
      SELECT rowid, fts5_test_poslist(xx) FROM xx WHERE xx match $expr
    } $res

    set res [collist_data $expr]
    do_execsql_test 1.$tn2.3.$tn.c.[llength $res] { 
      SELECT rowid, fts5_test_collist(xx) FROM xx WHERE xx match $expr
    } $res
  }

  #-------------------------------------------------------------------------
  # Some NEAR queries.
  #
  foreach {tn expr} {
    1 "NEAR(a b)"
    2 "NEAR(r c)"
    2 { NEAR(r c, 5) }
    3 { NEAR(r c, 3) }
    4 { NEAR(r c, 2) }
    5 { NEAR(r c, 0) }
    6 { NEAR(a b c) }
    7 { NEAR(a b c, 8) }
    8  { x : NEAR(r c) }
    9  { y : NEAR(r c) }
  } {
    set res [poslist_data 1 $expr]
    do_execsql_test 1.$tn2.5.1.$tn.p.[llength $res] { 
      SELECT rowid, fts5_test_poslist(xx) FROM xx WHERE xx match $expr
    } $res

    set res [collist_data $expr]
    do_execsql_test 1.$tn2.5.1.$tn.c.[llength $res] { 
      SELECT rowid, fts5_test_collist(xx) FROM xx WHERE xx match $expr
    } $res
  }

  do_test $tn2.4.1  { nearset {{a b c}} -- a } {0.0.0}
  do_test $tn2.4.2  { nearset {{a b c}} -- c } {0.0.2}

  foreach {tn expr tclexpr} {
    1 {a b} {AND [N $x -- {a}] [N $x -- {b}]}
  } {
    do_execsql_test 1.$tn2.6.$tn {
      SELECT fts5_expr_tcl($expr, 'N $x')
    } [list $tclexpr]
  }

  #-------------------------------------------------------------------------
  #
  do_execsql_test 1.$tn2.7.integrity {
    INSERT INTO xx(xx) VALUES('integrity-check');
  }
  #db eval {SELECT rowid, fts5_decode(rowid, block) aS r FROM xx_data} {puts $r}
  foreach {bAsc sql} {
    1 {SELECT rowid FROM xx WHERE xx MATCH $expr}
    0 {SELECT rowid FROM xx WHERE xx MATCH $expr ORDER BY rowid DESC}
  } {
    foreach {tn expr} {
      0.1 x
      1 { NEAR(r c) }
      2 { NEAR(r c, 5) }
      3 { NEAR(r c, 3) }
      4 { NEAR(r c, 2) }
      5 { NEAR(r c, 0) }
      6 { NEAR(a b c) }
      7 { NEAR(a b c, 8) }
      8  { x : NEAR(r c) }
      9  { y : NEAR(r c) }
      10 { x : "r c" }
      11 { y : "r c" }
      12 { a AND b }
      13 { a AND b AND c }
      14a { a }
      14b { a OR b }
      15 { a OR b AND c }
      16 { c AND b OR a }
      17 { c AND (b OR a) }
      18 { c NOT (b OR a) }
      19 { c NOT b OR a AND d }

    } {
      set res [poslist_data 0 $expr $bAsc]







      do_execsql_test 1.$tn2.7.$bAsc.$tn.[llength $res] $sql $res



    }






  }
}

}

do_execsql_test 2.1 {
  SELECT fts5_expr_tcl('a AND b');
} {{AND [nearset -- {a}] [nearset -- {b}]}}

finish_test










finish_test

# End of test code
#-------------------------------------------------------------------------

foreach {tn2 sql} {
  1  {}
  2  {BEGIN}
} {
if {[detail_is_full]} continue
  reset_db
  fts5_aux_test_functions db

  do_execsql_test 1.$tn2.0 {
    CREATE VIRTUAL TABLE xx USING fts5(x,y, detail=%DETAIL%);
    INSERT INTO xx(xx, rank) VALUES('pgsz', 32);
  }
................................................................................
  do_test 1.$tn2.1.1 {
    foreach {id x y} $data {
      execsql { INSERT INTO xx(rowid, x, y) VALUES($id, $x, $y) }
    }
    execsql { INSERT INTO xx(xx) VALUES('integrity-check') }
  } {}


  #-------------------------------------------------------------------------

  #
  do_execsql_test 1.$tn2.integrity {
    INSERT INTO xx(xx) VALUES('integrity-check');
  }

  #-------------------------------------------------------------------------
  #
  foreach {tn expr} {
    1.2 "a   OR b"
    1.1 "a   AND b"
    1.3 "o"
    1.4 "b q"
    1.5 "e a e"
    1.6 "m d g q q b k b w f q q p p"
    1.7 "l o o l v v k"
    1.8 "a"
    1.9 "b"
    1.10 "c"
    1.11 "no"
    1.12 "L O O L V V K"
    1.13 "a AND b AND c"






    1.14 "x:a"











    2.1 "x:a"
    2.2 "y:a"
    2.3 "x:b"
    2.4 "y:b"

    3.1 "{x}:a"
    3.2 "{y}:a"
    3.3 "{x}:b"
    3.4 "{y}:b"

    4.1 "{x y}:a"
    4.2 "{y x}:a"
    4.3 "{x x}:b"
    4.4 "{y y}:b"

    5.1 {{"x" "y"}:a}
    5.2 {{"y" x}:a}
    5.3 {{x "x"}:b}
    5.4 {{"y" y}:b}


















    6.1 "b + q"
    6.2 "e + a + e"
    6.3 "m + d + g + q + q + b + k + b + w + f + q + q + p + p"
    6.4 "l + o + o + l + v + v + k"
    6.5 "L + O + O + L + V + V + K"

















    7.1 "a+b AND c"
    7.2 "d+c AND u"
    7.3 "d+c AND u+d"

    7.4 "a+b OR c"
    7.5 "d+c OR u"
    7.6 "d+c OR u+d"
















    8.1 "NEAR(a b)"
    8.2 "NEAR(r c)"
    8.2 { NEAR(r c, 5) }
    8.3 { NEAR(r c, 3) }
    8.4 { NEAR(r c, 2) }
    8.5 { NEAR(r c, 0) }
    8.6 { NEAR(a b c) }
    8.7 { NEAR(a b c, 8) }
    8.8  { x : NEAR(r c) }
    8.9  { y : NEAR(r c) }



































    9.1 { NEAR(r c) }
    9.2 { NEAR(r c, 5) }
    9.3 { NEAR(r c, 3) }
    9.4 { NEAR(r c, 2) }
    9.5 { NEAR(r c, 0) }
    9.6 { NEAR(a b c) }
    9.7 { NEAR(a b c, 8) }
    9.8  { x : NEAR(r c) }
    9.9  { y : NEAR(r c) }
    9.10 { x : "r c" }
    9.11 { y : "r c" }
    9.12 { a AND b }
    9.13 { a AND b AND c }
    9.14a { a }
    9.14b { a OR b }
    9.15 { a OR b AND c }
    9.16 { c AND b OR a }
    9.17 { c AND (b OR a) }
    9.18 { c NOT (b OR a) }

    9.19 { (c NOT b) OR (a AND d) }
  } {


    if {[fts5_expr_ok $expr xx]==0} {
      do_test 1.$tn2.$tn.OMITTED { list } [list]
      continue
    }

    set res [fts5_query_data $expr xx]
    do_execsql_test 1.$tn2.$tn.[llength $res].asc {
      SELECT rowid, fts5_test_poslist(xx), fts5_test_collist(xx) 
      FROM xx WHERE xx match $expr
    } $res


    set res [fts5_query_data $expr xx DESC]
    do_execsql_test 1.$tn2.$tn.[llength $res].desc {
      SELECT rowid, fts5_test_poslist(xx), fts5_test_collist(xx) 
      FROM xx WHERE xx match $expr ORDER BY 1 DESC
    } $res
  }
}

}

do_execsql_test 2.1 {
  SELECT fts5_expr_tcl('a AND b');
} {{AND [nearset -- {a}] [nearset -- {b}]}}

do_test 2.2.1  { nearset {{a b c}} -- a } {0.0.0}
do_test 2.2.2  { nearset {{a b c}} -- c } {0.0.2}

foreach {tn expr tclexpr} {
  1 {a b} {AND [N $x -- {a}] [N $x -- {b}]}
} {
  do_execsql_test 2.3.$tn {
    SELECT fts5_expr_tcl($expr, 'N $x')
  } [list $tclexpr]
}

finish_test

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


set data {
    -4026076
    {n x w k b p x b n t t d s}     {f j j s p j o}               
    {w v i y r}                     {i p y s}                     
    {a o q v e n q r}               {q v g u c y a z y}           
    3995120
    {c}                             {e e w d t}                   
................................................................................

do_execsql_test 1.0 {
  CREATE VIRTUAL TABLE tt USING fts5(a, b, c, d, e, f);
} {}

fts5_aux_test_functions db

proc matchdata {expr tbl collist {order ASC}} {

  set cols ""
  foreach e $collist {
    append cols ", '$e'"
  }

  set tclexpr [db one [subst -novar {
    SELECT fts5_expr_tcl(
      $expr, 'nearset $cols -pc ::pc' [set cols]
    )
  }]]
  set res [list]

  db eval "SELECT rowid, * FROM $tbl ORDER BY rowid $order" x {
    set cols [list]
    foreach col $x(*) {
      if {$col != "rowid"} { lappend cols $x($col) }
    }
    # set cols [list $a $b $c $d $e $f]
    set ::pc 0
    set rowdata [eval $tclexpr]
    if {$rowdata != ""} { lappend res $x(rowid) $rowdata }
  }

  set res
}

proc do_auto_test {tn tbl cols expr} { 
  foreach order {asc desc} {
    set res [matchdata $expr $tbl $cols $order]
    set testname "$tn.[string range $order 0 0].rows=[expr [llength $res]/2]"

    set ::autotest_expr $expr
    do_execsql_test $testname [subst -novar {
      SELECT rowid, fts5_test_poslist([set tbl]) FROM [set tbl] 
      WHERE [set tbl] MATCH $::autotest_expr ORDER BY rowid [set order]
    }] $res
  }


}

#-------------------------------------------------------------------------
#

for {set fold 0} {$fold < 3} {incr fold} {
  switch $fold {
................................................................................
    B.4 { a OR (b AND {a b c}:c) }
    B.5 { a OR "b c" }
    B.6 { a OR b OR c }

    C.1 { a OR (b AND "b c") }
    C.2 { a OR (b AND "z c") }
  } {
    do_auto_test 3.$fold.$tn tt {a b c d e f} $expr
  }
}

proc replace_elems {list args} {
  set ret $list
  foreach {idx elem} $args {
    set ret [lreplace $ret $idx $idx $elem]
................................................................................
  1 x    
  2 y    
  3 z

  4 {c1 : x} 5 {c2 : x} 6 {c3 : x}
  7 {c1 : y} 8 {c2 : y} 9 {c3 : y}
  10 {c1 : z} 11 {c2 : z} 12 {c3 : z}


} {
  do_auto_test 4.$tn yy {c1 c2 c3} $expr
}



finish_test

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


set data {
    -4026076
    {n x w k b p x b n t t d s}     {f j j s p j o}               
    {w v i y r}                     {i p y s}                     
    {a o q v e n q r}               {q v g u c y a z y}           
    3995120
    {c}                             {e e w d t}                   
................................................................................

do_execsql_test 1.0 {
  CREATE VIRTUAL TABLE tt USING fts5(a, b, c, d, e, f);
} {}

fts5_aux_test_functions db





























proc do_auto_test {tn tbl expr} {
  foreach order {asc desc} {
    set res [fts5_poslist_data $expr $tbl $order]
    set testname "$tn.[string range $order 0 0].rows=[expr [llength $res]/2]"

    set ::autotest_expr $expr
    do_execsql_test $testname [subst -novar {
      SELECT rowid, fts5_test_poslist([set tbl]) FROM [set tbl] 
      WHERE [set tbl] MATCH $::autotest_expr ORDER BY rowid [set order]
    }] $res
  }


}

#-------------------------------------------------------------------------
#

for {set fold 0} {$fold < 3} {incr fold} {
  switch $fold {
................................................................................
    B.4 { a OR (b AND {a b c}:c) }
    B.5 { a OR "b c" }
    B.6 { a OR b OR c }

    C.1 { a OR (b AND "b c") }
    C.2 { a OR (b AND "z c") }
  } {
    do_auto_test 3.$fold.$tn tt $expr
  }
}

proc replace_elems {list args} {
  set ret $list
  foreach {idx elem} $args {
    set ret [lreplace $ret $idx $idx $elem]
................................................................................
  1 x    
  2 y    
  3 z

  4 {c1 : x} 5 {c2 : x} 6 {c3 : x}
  7 {c1 : y} 8 {c2 : y} 9 {c3 : y}
  10 {c1 : z} 11 {c2 : z} 12 {c3 : z}


} {
  do_auto_test 4.$tn yy $expr
}



finish_test

set testprefix fts5simple

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



#-------------------------------------------------------------------------
#
set doc "x x [string repeat {y } 50]z z"
do_execsql_test 1.0 {
  CREATE VIRTUAL TABLE t1 USING fts5(x);
  INSERT INTO t1(t1, rank) VALUES('pgsz', 32);
................................................................................
  CREATE VIRTUAL TABLE x2 USING fts5(x, prefix=1);
  INSERT INTO x2 VALUES('ab');
}

do_execsql_test 15.1 {
  INSERT INTO x2(x2) VALUES('integrity-check');
}




















finish_test

set testprefix fts5simple

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

 if 1 {

#-------------------------------------------------------------------------
#
set doc "x x [string repeat {y } 50]z z"
do_execsql_test 1.0 {
  CREATE VIRTUAL TABLE t1 USING fts5(x);
  INSERT INTO t1(t1, rank) VALUES('pgsz', 32);
................................................................................
  CREATE VIRTUAL TABLE x2 USING fts5(x, prefix=1);
  INSERT INTO x2 VALUES('ab');
}

do_execsql_test 15.1 {
  INSERT INTO x2(x2) VALUES('integrity-check');
}

}

#-------------------------------------------------------------------------
foreach_detail_mode $testprefix {
  reset_db
  fts5_aux_test_functions db
  do_execsql_test 16.0 {
    CREATE VIRTUAL TABLE x3 USING fts5(x, detail=%DETAIL%);
    INSERT INTO x3 VALUES('a b c d e f');
  }
  do_execsql_test 16.1 {
    SELECT fts5_test_poslist(x3) FROM x3('(a NOT b) OR c');
  } {2.0.2}

  do_execsql_test 16.1 {
    SELECT fts5_test_poslist(x3) FROM x3('a OR c');
  } {{0.0.0 1.0.2}}
}

finish_test