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Overview
Comment:Fix a bad assert() in window.c.
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SHA3-256:fe8aaf0c806413965f50a03e34b5fdfaaa8b09dc0af73f41e830f7b664bd1ced
User & Date: dan 2018-07-09 06:51:36
Context
2018-07-09
13:31
Throw an error if the second argument passed to nth_value() is not a positive integer. check-in: 1a06e57a user: dan tags: trunk
06:51
Fix a bad assert() in window.c. check-in: fe8aaf0c user: dan tags: trunk
02:37
Simplification to the logic that detects misuse of the application-defined function creation interfaces. check-in: 8f21d778 user: drh tags: trunk
Changes
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Changes to src/window.c.

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           || pWin->pFunc->zName==lagName
    ){
      /* no-op */
    }else{
      int addrIf = 0;
      if( pWin->pFilter ){
        int regTmp;
        assert( nArg==pWin->pOwner->x.pList->nExpr );

        if( csr>0 ){
          regTmp = sqlite3GetTempReg(pParse);
          sqlite3VdbeAddOp3(v, OP_Column, csr, pWin->iArgCol+nArg,regTmp);
        }else{
          regTmp = regArg + nArg;
        }
        addrIf = sqlite3VdbeAddOp3(v, OP_IfNot, regTmp, 0, 1);
................................................................................
        VdbeCoverage(v);
        if( csr>0 ){
          sqlite3ReleaseTempReg(pParse, regTmp);
        }
      }
      if( pWin->pFunc->funcFlags & SQLITE_FUNC_NEEDCOLL ){
        CollSeq *pColl;

        pColl = sqlite3ExprNNCollSeq(pParse, pWin->pOwner->x.pList->a[0].pExpr);
        sqlite3VdbeAddOp4(v, OP_CollSeq, 0,0,0, (const char*)pColl, P4_COLLSEQ);
      }
      sqlite3VdbeAddOp3(v, bInverse? OP_AggInverse : OP_AggStep, 
                        bInverse, regArg, pWin->regAccum);
      sqlite3VdbeAppendP4(v, pWin->pFunc, P4_FUNCDEF);
      sqlite3VdbeChangeP5(v, (u8)nArg);







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           || pWin->pFunc->zName==lagName
    ){
      /* no-op */
    }else{
      int addrIf = 0;
      if( pWin->pFilter ){
        int regTmp;
        assert( nArg==0 || nArg==pWin->pOwner->x.pList->nExpr );
        assert( nArg || pWin->pOwner->x.pList==0 );
        if( csr>0 ){
          regTmp = sqlite3GetTempReg(pParse);
          sqlite3VdbeAddOp3(v, OP_Column, csr, pWin->iArgCol+nArg,regTmp);
        }else{
          regTmp = regArg + nArg;
        }
        addrIf = sqlite3VdbeAddOp3(v, OP_IfNot, regTmp, 0, 1);
................................................................................
        VdbeCoverage(v);
        if( csr>0 ){
          sqlite3ReleaseTempReg(pParse, regTmp);
        }
      }
      if( pWin->pFunc->funcFlags & SQLITE_FUNC_NEEDCOLL ){
        CollSeq *pColl;
        assert( nArg>0 );
        pColl = sqlite3ExprNNCollSeq(pParse, pWin->pOwner->x.pList->a[0].pExpr);
        sqlite3VdbeAddOp4(v, OP_CollSeq, 0,0,0, (const char*)pColl, P4_COLLSEQ);
      }
      sqlite3VdbeAddOp3(v, bInverse? OP_AggInverse : OP_AggStep, 
                        bInverse, regArg, pWin->regAccum);
      sqlite3VdbeAppendP4(v, pWin->pFunc, P4_FUNCDEF);
      sqlite3VdbeChangeP5(v, (u8)nArg);

Changes to test/window6.test.

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do_catchsql_test 9.8.2 {
  WITH RECURSIVE c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<5)
  SELECT count() OVER (
      ORDER BY x ROWS BETWEEN 2 PRECEDING AND a FOLLOWING
  ) FROM c;
} {1 {frame ending offset must be a non-negative integer}}








finish_test







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do_catchsql_test 9.8.2 {
  WITH RECURSIVE c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<5)
  SELECT count() OVER (
      ORDER BY x ROWS BETWEEN 2 PRECEDING AND a FOLLOWING
  ) FROM c;
} {1 {frame ending offset must be a non-negative integer}}

do_execsql_test 10.0 {
  WITH t1(a,b) AS (VALUES(1,2))
  SELECT count() FILTER (where b<>5) OVER w1
    FROM t1
    WINDOW w1 AS (ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING);
} {1}

finish_test