SQLite

      pIndex->uniqNotNull = 0;
      pIndex->bHasExpr = 1;
    }else{
      j = pCExpr->iColumn;
      assert( j<=0x7fff );
      if( j<0 ){
        j = pTab->iPKey;
        pIndex->bIdxRowid = 1;
      }else{
        if( pTab->aCol[j].notNull==0 ){
          pIndex->uniqNotNull = 0;
        }
        if( pTab->aCol[j].colFlags & COLFLAG_VIRTUAL ){
          pIndex->bHasVCol = 1;
          pIndex->bHasExpr = 1;

  unsigned isResized:1;    /* True if resizeIndexObject() has been called */
  unsigned isCovering:1;   /* True if this is a covering index */
  unsigned noSkipScan:1;   /* Do not try to use skip-scan if true */
  unsigned hasStat1:1;     /* aiRowLogEst values come from sqlite_stat1 */
  unsigned bLowQual:1;     /* sqlite_stat1 says this is a low-quality index */
  unsigned bNoQuery:1;     /* Do not use this index to optimize queries */
  unsigned bAscKeyBug:1;   /* True if the bba7b69f9849b5bf bug applies */
  unsigned bIdxRowid:1;    /* One or more of the index keys is the ROWID */
  unsigned bHasVCol:1;     /* Index references one or more VIRTUAL columns */
  unsigned bHasExpr:1;     /* Index contains an expression, either a literal
                           ** expression, or a reference to a VIRTUAL column */
#ifdef SQLITE_ENABLE_STAT4
  int nSample;             /* Number of elements in aSample[] */
  int mxSample;            /* Number of slots allocated to aSample[] */
  int nSampleCol;          /* Size of IndexSample.anEq[] and so on */

    }else{
      pNew->nOut = nOutUnadjusted;
    }

    if( (pNew->wsFlags & WHERE_TOP_LIMIT)==0
     && pNew->u.btree.nEq<pProbe->nColumn
     && (pNew->u.btree.nEq<pProbe->nKeyCol ||
          (pProbe->idxType!=SQLITE_IDXTYPE_PRIMARYKEY && !pProbe->bIdxRowid))
    ){
      if( pNew->u.btree.nEq>3 ){
        sqlite3ProgressCheck(pParse);
      }
      whereLoopAddBtreeIndex(pBuilder, pSrc, pProbe, nInMul+nIn);
    }
    pNew->nOut = saved_nOut;

} {0 1}
do_execsql_test 33.3 {
  SELECT * FROM t1 WHERE (a,b) BETWEEN (14,99) AND (16,0);
} {15 -7}
do_execsql_test 33.3 {
  SELECT * FROM t1 WHERE (a,b) BETWEEN (2,99) AND (4,0);
} {3 100}

# 2025-04-15 https://sqlite.org/forum/forumpost/b9647a113b465950
# Incorrect result when the schema includes a table with a UNIQUE
# constraint and one of the columns in the UNIQUE constraint is the
# INTEGER PRIMARY KEY, and the columns that UNIQUE constraint are
# used in a rowvalue-IN operator constraint.
#
reset_db
do_execsql_test 34.1 {
  CREATE TABLE items (
    Id INTEGER  /* rowid alias */,
    Item INTEGER  /* any type */,
    Test TEXT  /* TEXT or BLOB */,
    Filler,  /* any type */
    PRIMARY KEY(Id),
    UNIQUE(Item, Id)
  );
  INSERT INTO items (Id, Item)
    VALUES (1, 2), (2, 2), (3, 3), (4, 5);
  UPDATE items SET test='ok'
    WHERE (Id, Item) IN (SELECT Id, Item FROM items);
  SELECT Id, Item, test FROM items ORDER BY id;
} {1 2 ok 2 2 ok 3 3 ok 4 5 ok}

finish_test