SQLite

      zId = pExpr->u.zToken;
      pDef = sqlite3FindFunction(db, zId, nFarg, enc, 0);
#ifdef SQLITE_ENABLE_UNKNOWN_SQL_FUNCTION
      if( pDef==0 && pParse->explain ){
        pDef = sqlite3FindFunction(db, "unknown", nFarg, enc, 0);
      }
#endif
      if( pDef==0 /* || pDef->xFinalize!=0 */ ){
      if( pDef==0 || pDef->xFinalize!=0 ){
        sqlite3ErrorMsg(pParse, "unknown function: %s()", zId);
        break;
      }

      /* Attempt a direct implementation of the built-in COALESCE() and
      ** IFNULL() functions.  This avoids unnecessary evaluation of
      ** arguments past the first non-NULL argument.

  }
  A = sqlite3ExprFunction(pParse, Y, &X);
  sqlite3WindowAttach(pParse, A, Z);
  if( D==SF_Distinct && A ){
    A->flags |= EP_Distinct;
  }
}
expr(A) ::= id(X) LP STAR RP. {
expr(A) ::= id(X) LP STAR RP window(Z). {
  A = sqlite3ExprFunction(pParse, 0, &X);
  sqlite3WindowAttach(pParse, A, Z);
}
term(A) ::= CTIME_KW(OP). {
  A = sqlite3ExprFunction(pParse, 0, &OP);
}


%type window {Window*}

#ifndef SQLITE_OMIT_SUBQUERY
      Select *pSel = pFrom->pSelect;
      /* A sub-query in the FROM clause of a SELECT */
      assert( pSel!=0 );
      assert( pFrom->pTab==0 );
      if( sqlite3WalkSelect(pWalker, pSel) ) return WRC_Abort;
      if( selectExpandSubquery(pParse, pFrom) ) return WRC_Abort;
#if 0
      pFrom->pTab = pTab = sqlite3DbMallocZero(db, sizeof(Table));
      if( pTab==0 ) return WRC_Abort;
      pTab->nTabRef = 1;
      if( pFrom->zAlias ){
        pTab->zName = sqlite3DbStrDup(db, pFrom->zAlias);
      }else{
        pTab->zName = sqlite3MPrintf(db, "subquery_%p", (void*)pTab);
      }
      while( pSel->pPrior ){ pSel = pSel->pPrior; }
      sqlite3ColumnsFromExprList(pParse, pSel->pEList,&pTab->nCol,&pTab->aCol);
      pTab->iPKey = -1;
      pTab->nRowLogEst = 200; assert( 200==sqlite3LogEst(1048576) );
      pTab->tabFlags |= TF_Ephemeral;
#endif
#endif
    }else{
      /* An ordinary table or view name in the FROM clause */
      assert( pFrom->pTab==0 );
      pFrom->pTab = pTab = sqlite3LocateTableItem(pParse, 0, pFrom);
      if( pTab==0 ) return WRC_Abort;
      if( pTab->nTabRef>=0xffff ){

test_suite "veryquick" -prefix "" -description {
  "Very" quick test suite. Runs in minutes on a workstation.
  This test suite is the same as the "quick" tests, except that some files
  that test malloc and IO errors are omitted.
} -files [
  test_set $allquicktests -exclude *malloc* *ioerr* *fault* *bigfile* *_err* \
      *fts5corrupt* *fts5big* *fts5aj* *expert* table.test
      *fts5corrupt* *fts5big* *fts5aj*
]

test_suite "extraquick" -prefix "" -description {
  "Extra" quick test suite. Runs in a few minutes on a workstation.
  This test suite is the same as the "veryquick" tests, except that
  slower tests are omitted.
} -files [

  2  3       1.0
  3  6       1.5
  4  10      2.0
  5  15      2.5
  6  21      3.0
}

do_execsql_test 4.10 {
do_execsql_test 4.10.1 {
  SELECT a, 
    count() OVER (ORDER BY a DESC),
    group_concat(a, '.') OVER (ORDER BY a DESC) 
  FROM t2 ORDER BY a DESC
} {
  6 1 6
  5 2 6.5
  4 3 6.5.4
  3 4 6.5.4.3
  2 5 6.5.4.3.2
  1 6 6.5.4.3.2.1
  0 7 6.5.4.3.2.1.0
}

do_execsql_test 4.10.2 {
  SELECT a, 
    count(*) OVER (ORDER BY a DESC),
    group_concat(a, '.') OVER (ORDER BY a DESC) 
  FROM t2 ORDER BY a DESC
} {
  6 1 6
  5 2 6.5
  4 3 6.5.4
  3 4 6.5.4.3
  2 5 6.5.4.3.2
  1 6 6.5.4.3.2.1
  0 7 6.5.4.3.2.1.0

# 2018 May 19
#
# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
#

package require sqlite3
package require Pgtcl

set db [pg_connect -conninfo "dbname=postgres user=postgres password=postgres"]
sqlite3 sqlite ""

proc execsql {sql} {

  set lSql [list]
  set frag ""
  while {[string length $sql]>0} {
    set i [string first ";" $sql]
    if {$i>=0} {
      append frag [string range $sql 0 $i]
      set sql [string range $sql $i+1 end]
      if {[sqlite complete $frag]} {
        lappend lSql $frag
        set frag ""
      }
    } else {
      set frag $sql
      set sql ""
    }
  }
  if {$frag != ""} {
    lappend lSql $frag
  }
  #puts $lSql

  set ret [list]
  foreach stmt $lSql {
    set res [pg_exec $::db $stmt]
    set err [pg_result $res -error]
    if {$err!=""} { error $err }
    for {set i 0} {$i < [pg_result $res -numTuples]} {incr i} {
      lappend ret {*}[pg_result $res -getTuple $i]
    }
    pg_result $res -clear
  }

  set ret
}

proc execsql_test {tn sql} {
  set res [execsql $sql]
  puts $::fd "do_execsql_test $tn {"
  puts $::fd "  [string trim $sql]"
  puts $::fd "} {$res}"
  puts $::fd ""
}

proc start_test {name date} {
  set dir [file dirname $::argv0]
  set output [file join $dir $name.test]
  set ::fd [open $output w]
puts $::fd [string trimleft "
# $date
#
# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for SQLite library.
#

####################################################
# DO NOT EDIT! THIS FILE IS AUTOMATICALLY GENERATED!
####################################################
"]
  puts $::fd {set testdir [file dirname $argv0]}
  puts $::fd {source $testdir/tester.tcl}
  puts $::fd "set testprefix $name"
  puts $::fd ""
}

proc finish_test {} {
  puts $::fd finish_test
  close $::fd
}

#=========================================================================


start_test window2 "2018 May 19"

execsql_test 1.0 {
  DROP TABLE IF EXISTS t1;
  CREATE TABLE t1(a INTEGER PRIMARY KEY, b TEXT, c TEXT, d INTEGER);
  INSERT INTO t1 VALUES(1, 'odd',  'one',   1);
  INSERT INTO t1 VALUES(2, 'even', 'two',   2);
  INSERT INTO t1 VALUES(3, 'odd',  'three', 3);
  INSERT INTO t1 VALUES(4, 'even', 'four',  4);
  INSERT INTO t1 VALUES(5, 'odd',  'five',  5);
  INSERT INTO t1 VALUES(6, 'even', 'six',   6);
}

execsql_test 1.1 {
  SELECT c, sum(d) OVER (PARTITION BY b ORDER BY c) FROM t1;
}

execsql_test 1.2 {
  SELECT sum(d) OVER () FROM t1;
}

execsql_test 1.3 {
  SELECT sum(d) OVER (PARTITION BY b) FROM t1;
}

finish_test

# 2018 May 19
#
# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for SQLite library.
#

####################################################
# DO NOT EDIT! THIS FILE IS AUTOMATICALLY GENERATED!
####################################################

set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix window2

do_execsql_test 1.0 {
  DROP TABLE IF EXISTS t1;
  CREATE TABLE t1(a INTEGER PRIMARY KEY, b TEXT, c TEXT, d INTEGER);
  INSERT INTO t1 VALUES(1, 'odd',  'one',   1);
  INSERT INTO t1 VALUES(2, 'even', 'two',   2);
  INSERT INTO t1 VALUES(3, 'odd',  'three', 3);
  INSERT INTO t1 VALUES(4, 'even', 'four',  4);
  INSERT INTO t1 VALUES(5, 'odd',  'five',  5);
  INSERT INTO t1 VALUES(6, 'even', 'six',   6);
} {}

do_execsql_test 1.1 {
  SELECT c, sum(d) OVER (PARTITION BY b ORDER BY c) FROM t1;
} {four 4 six 10 two 12 five 5 one 6 three 9}

do_execsql_test 1.2 {
  SELECT sum(d) OVER () FROM t1;
} {21 21 21 21 21 21}

do_execsql_test 1.3 {
  SELECT sum(d) OVER (PARTITION BY b) FROM t1;
} {12 12 12 9 9 9}

finish_test