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Overview
Comment:Ensure that the expression rewriter inside the query flattener decends into the substructure of the TK_IF_NULL_ROW operator. This is a continuation of the fix for ticket [cad1ab4cb7b0fc344].
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Timelines: family | ancestors | descendants | both | branch-3.19
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SHA3-256: 28d2902d8f4dfbbfc610f271e00d353b0baae386b56b482f96b88836410be129
User & Date: drh 2017-05-23 12:44:57.667
Context
2017-05-23
15:33
Disable the LEFT JOIN flattening optimization for aggregate queries, as it does not currently work. Further fix for ticket [cad1ab4cb7b0fc344]. (check-in: 05ada74155 user: drh tags: branch-3.19)
12:44
Ensure that the expression rewriter inside the query flattener decends into the substructure of the TK_IF_NULL_ROW operator. This is a continuation of the fix for ticket [cad1ab4cb7b0fc344]. (check-in: 28d2902d8f user: drh tags: branch-3.19)
12:36
Ensure that the expression rewriter inside the query flattener decends into the substructure of the TK_IF_NULL_ROW operator. This is a continuation of the fix for ticket [cad1ab4cb7b0fc344]. (check-in: 941d8142b7 user: drh tags: trunk)
01:35
Change the version number to 3.19.1. (check-in: 16656b8ff5 user: drh tags: branch-3.19)
Changes
Unified Diff Ignore Whitespace Patch
Changes to src/select.c.
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          pNew->iRightJoinTable = pExpr->iRightJoinTable;
          pNew->flags |= EP_FromJoin;
        }
        sqlite3ExprDelete(db, pExpr);
        pExpr = pNew;
      }
    }

  }else if( pExpr->op==TK_IF_NULL_ROW && pExpr->iTable==pSubst->iTable ){
    pExpr->iTable = pSubst->iNewTable;
  }else{

    pExpr->pLeft = substExpr(pSubst, pExpr->pLeft);
    pExpr->pRight = substExpr(pSubst, pExpr->pRight);
    if( ExprHasProperty(pExpr, EP_xIsSelect) ){
      substSelect(pSubst, pExpr->x.pSelect, 1);
    }else{
      substExprList(pSubst, pExpr->x.pList);
    }








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          pNew->iRightJoinTable = pExpr->iRightJoinTable;
          pNew->flags |= EP_FromJoin;
        }
        sqlite3ExprDelete(db, pExpr);
        pExpr = pNew;
      }
    }
  }else{
    if( pExpr->op==TK_IF_NULL_ROW && pExpr->iTable==pSubst->iTable ){
      pExpr->iTable = pSubst->iNewTable;

    }
    pExpr->pLeft = substExpr(pSubst, pExpr->pLeft);
    pExpr->pRight = substExpr(pSubst, pExpr->pRight);
    if( ExprHasProperty(pExpr, EP_xIsSelect) ){
      substSelect(pSubst, pExpr->x.pSelect, 1);
    }else{
      substExprList(pSubst, pExpr->x.pList);
    }
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Changes to test/join.test.
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} {1 1 1}
do_execsql_test join-14.2 {
  SELECT *
  FROM (SELECT 1 a) AS x
    LEFT JOIN (SELECT 1, * FROM (SELECT * FROM (SELECT * FROM (SELECT 1)))) AS y
    JOIN (SELECT * FROM (SELECT 9)) AS z;
} {1 1 1 9}






finish_test








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} {1 1 1}
do_execsql_test join-14.2 {
  SELECT *
  FROM (SELECT 1 a) AS x
    LEFT JOIN (SELECT 1, * FROM (SELECT * FROM (SELECT * FROM (SELECT 1)))) AS y
    JOIN (SELECT * FROM (SELECT 9)) AS z;
} {1 1 1 9}
do_execsql_test join-14.3 {
  SELECT *
  FROM (SELECT 111)
  LEFT JOIN (SELECT cc+222, * FROM (SELECT * FROM (SELECT 333 cc)));
} {111 555 333}

finish_test