# 2024-05-01
#
# 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.
#
#***********************************************************************
#
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix in7

do_execsql_test 1.0 {
  CREATE TABLE t1(a, b, c PRIMARY KEY);
  CREATE TABLE t2(x, y, z);
}

foreach {tn nNext idx sql} {
  1 1 {
    CREATE INDEX i1 ON t1(a, b);
  } {
    SELECT * FROM t1 WHERE (a, b) IN (SELECT x, y FROM t2)
  } 

  2 0 {
    CREATE UNIQUE INDEX i1 ON t1(a, b);
  } {
    SELECT * FROM t1 WHERE (a, b) IN (SELECT x, y FROM t2)
  } 

  3 0 {
    CREATE UNIQUE INDEX i1 ON t1(a, b);
  } {
    SELECT * FROM t1 WHERE a = ? AND b = ?
  } 

  3 1 {
    CREATE UNIQUE INDEX i1 ON t1(a, b);
  } {
    SELECT * FROM t1 WHERE a = ? AND b IS ?
  } 

  4 0 {
    CREATE UNIQUE INDEX i1 ON t1(a, b);
  } {
    SELECT * FROM t1 WHERE a = ? AND b IN (?, ?, ?);
  } 

  5 1 {
    CREATE UNIQUE INDEX i1 ON t1(a, b, c);
  } {
    SELECT * FROM t1 WHERE a = ? AND b = ?
  } 

  6 0 {
  } {
    SELECT * FROM t1 WHERE c IN (SELECT z FROM t2)
  } 

  7 0 {
  } {
    SELECT * FROM t1 WHERE (a, c) IN (SELECT z, x FROM t2)
  } 

  8 1 {
  } {
    SELECT * FROM t1 WHERE a IN (SELECT z FROM t2)
  } 

  9 1 {
    CREATE UNIQUE INDEX i1 ON t1(a, b);
  } {
    SELECT * FROM t1 WHERE a IN (SELECT z FROM t2) AND b IS ?
  } 
  10 0 {
    CREATE UNIQUE INDEX i1 ON t1(a, b);
  } {
    SELECT * FROM t1 WHERE a IN (SELECT z FROM t2) AND b = ?
  } 
  11 1 {
    CREATE UNIQUE INDEX i1 ON t1(a, b);
  } {
    SELECT * FROM t1 WHERE a IS NULL AND b IN (SELECT z FROM t2)
  } 
  12 0 {
    CREATE UNIQUE INDEX i1 ON t1(a, b);
  } {
    SELECT * FROM t1 WHERE a = ? AND b IN (SELECT z FROM t2)
  } 
} {
  do_test 1.1.$tn {
    execsql BEGIN
    execsql $idx

    catch { array unset root_to_tbl }
    catch { array unset csr_to_root }

    db eval {SELECT rootpage, tbl_name FROM sqlite_schema} {
      set root_to_tbl($rootpage) $tbl_name
    }

    set nSeen 0
    db eval "explain $sql" {
      if {$opcode=="OpenRead"} {
        set csr_to_root($p1) $p2
      }
      if {$opcode=="Next"} {
        catch {
          set root $csr_to_root($p1)
          set tbl $root_to_tbl($root)
          if {$tbl=="t1"} {incr nSeen}
        }
      }
    }

    execsql ROLLBACK

    set nSeen
  } $nNext
}

#-------------------------------------------------------------------------
reset_db
do_execsql_test 2.0 {
  CREATE TABLE t1(a TEXT PRIMARY KEY, b TEXT) WITHOUT ROWID;
  INSERT INTO t1 VALUES('1', 'one');
  INSERT INTO t1 VALUES('2', NULL);
  INSERT INTO t1 VALUES('3', 'three');
}

do_execsql_test 2.1 {
  SELECT b FROM t1 WHERE a IN (1,2,3) ORDER BY b ASC NULLS LAST;
} {one three {}}


finish_test