sqlite3VdbeChangeP4(v, addr, (void *)pKeyInfo, P4_KEYINFO);
  }
  if( addrOnce ){
    sqlite3VdbeJumpHere(v, addrOnce);
    /* Subroutine return */
    sqlite3VdbeAddOp1(v, OP_Return, pExpr->y.sub.regReturn);
    sqlite3VdbeChangeP1(v, pExpr->y.sub.iAddr-1, sqlite3VdbeCurrentAddr(v)-1);

  }
}
#endif /* SQLITE_OMIT_SUBQUERY */

/*
** Generate code for scalar subqueries used as a subquery expression
** or EXISTS operator:
................................................................................
  ExprSetVVAProperty(pExpr, EP_NoReduce);
  if( addrOnce ){
    sqlite3VdbeJumpHere(v, addrOnce);

    /* Subroutine return */
    sqlite3VdbeAddOp1(v, OP_Return, pExpr->y.sub.regReturn);
    sqlite3VdbeChangeP1(v, pExpr->y.sub.iAddr-1, sqlite3VdbeCurrentAddr(v)-1);

  }

  return rReg;
}
#endif /* SQLITE_OMIT_SUBQUERY */

#ifndef SQLITE_OMIT_SUBQUERY
................................................................................
    pParse->nRangeReg = nReg;
    pParse->iRangeReg = iReg;
  }
}

/*
** Mark all temporary registers as being unavailable for reuse.





*/
void sqlite3ClearTempRegCache(Parse *pParse){
  pParse->nTempReg = 0;
  pParse->nRangeReg = 0;
}

/*

    sqlite3VdbeChangeP4(v, addr, (void *)pKeyInfo, P4_KEYINFO);
  }
  if( addrOnce ){
    sqlite3VdbeJumpHere(v, addrOnce);
    /* Subroutine return */
    sqlite3VdbeAddOp1(v, OP_Return, pExpr->y.sub.regReturn);
    sqlite3VdbeChangeP1(v, pExpr->y.sub.iAddr-1, sqlite3VdbeCurrentAddr(v)-1);
    sqlite3ClearTempRegCache(pParse);
  }
}
#endif /* SQLITE_OMIT_SUBQUERY */

/*
** Generate code for scalar subqueries used as a subquery expression
** or EXISTS operator:
................................................................................
  ExprSetVVAProperty(pExpr, EP_NoReduce);
  if( addrOnce ){
    sqlite3VdbeJumpHere(v, addrOnce);

    /* Subroutine return */
    sqlite3VdbeAddOp1(v, OP_Return, pExpr->y.sub.regReturn);
    sqlite3VdbeChangeP1(v, pExpr->y.sub.iAddr-1, sqlite3VdbeCurrentAddr(v)-1);
    sqlite3ClearTempRegCache(pParse);
  }

  return rReg;
}
#endif /* SQLITE_OMIT_SUBQUERY */

#ifndef SQLITE_OMIT_SUBQUERY
................................................................................
    pParse->nRangeReg = nReg;
    pParse->iRangeReg = iReg;
  }
}

/*
** Mark all temporary registers as being unavailable for reuse.
**
** Always invoke this procedure after coding a subroutine or co-routine
** that might be invoked from other parts of the code, to ensure that
** the sub/co-routine does not use registers in common with the code that
** invokes the sub/co-routine.
*/
void sqlite3ClearTempRegCache(Parse *pParse){
  pParse->nTempReg = 0;
  pParse->nRangeReg = 0;
}

/*

# 2011 December 06
#
# 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.
................................................................................
        SELECT SrcWord, B.Id as BeginningId, B.Title || E.Title As Connected
        FROM Beginnings B LEFT JOIN Endings E ON B.EndingId=E.EndingId
        WHERE Connected=SrcWord LIMIT 1
      )
    )
} {FACTORING FACTOR SWIMMING SWIMM} 
















finish_test

# 2011-12-06
#
# 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.
................................................................................
        SELECT SrcWord, B.Id as BeginningId, B.Title || E.Title As Connected
        FROM Beginnings B LEFT JOIN Endings E ON B.EndingId=E.EndingId
        WHERE Connected=SrcWord LIMIT 1
      )
    )
} {FACTORING FACTOR SWIMMING SWIMM} 

# Similar problem discovered by dbsqlfuzz on 2019-09-18
#
do_execsql_test 3.0 {
  DROP TABLE IF EXISTS t1;
  CREATE TABLE t1(i INT PRIMARY KEY, a, b);
  INSERT INTO t1 VALUES(NULL,'one','i');
  CREATE INDEX i1a ON t1(a);
  CREATE INDEX i1b ON t1(b);
  SELECT (SELECT 1
            FROM (SELECT 1 FROM t1 WHERE a=1 OR b='i')
           WHERE a='o'
              OR b IN (SELECT a=('b' IN (SELECT 'a'))))
    FROM t1;
} {{}}

finish_test