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Overview
Comment:For sqlite3TreeView() debugging output, show the Expr.flags field on scalar subqueries.
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SHA3-256: dc857a96b00f13ffdf77bc222bc5acbbe14a36ca51e5368b568b3177d1be737a
User & Date: drh 2017-07-10 13:24:58
Context
2017-07-10
17:00
When multiple constraints need to be evaluated for a row, do any constraints that involve correlated subqueries last. Hence, the priority is index-covered constraints first, correlated subquery constraints last, and all others in the middle. This is a follow-on and improvement to the push-down optimization of check-in [d7bb79ed]. check-in: c4cb9048 user: drh tags: trunk
14:33
When testing non-indexed WHERE constraints, test those that involve correlated sub-queries last of all. This increases the chances of not having to run the sub-query at all. check-in: 1f9c1f35 user: dan tags: defer-where-subqueries
13:24
For sqlite3TreeView() debugging output, show the Expr.flags field on scalar subqueries. check-in: dc857a96 user: drh tags: trunk
12:07
Update error message text for standard error codes to better describe the latest usage of those error codes. Modify sqlite3_open_v2() so that it does return a valid sqlite3 object in the event of SQLITE_MISUSE due to bad open flags, so that sqlite3_errmsg() does not report "out of memory" in that case. check-in: f27b6370 user: drh tags: trunk
Changes
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Changes to src/treeview.c.

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      if( pFarg ){
        sqlite3TreeViewExprList(pView, pFarg, 0, 0);
      }
      break;
    }
#ifndef SQLITE_OMIT_SUBQUERY
    case TK_EXISTS: {
      sqlite3TreeViewLine(pView, "EXISTS-expr");
      sqlite3TreeViewSelect(pView, pExpr->x.pSelect, 0);
      break;
    }
    case TK_SELECT: {
      sqlite3TreeViewLine(pView, "SELECT-expr");
      sqlite3TreeViewSelect(pView, pExpr->x.pSelect, 0);
      break;
    }
    case TK_IN: {
      sqlite3TreeViewLine(pView, "IN");
      sqlite3TreeViewExpr(pView, pExpr->pLeft, 1);
      if( ExprHasProperty(pExpr, EP_xIsSelect) ){
        sqlite3TreeViewSelect(pView, pExpr->x.pSelect, 0);
      }else{
        sqlite3TreeViewExprList(pView, pExpr->x.pList, 0, 0);
      }
      break;







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      if( pFarg ){
        sqlite3TreeViewExprList(pView, pFarg, 0, 0);
      }
      break;
    }
#ifndef SQLITE_OMIT_SUBQUERY
    case TK_EXISTS: {
      sqlite3TreeViewLine(pView, "EXISTS-expr flags=0x%x", pExpr->flags);
      sqlite3TreeViewSelect(pView, pExpr->x.pSelect, 0);
      break;
    }
    case TK_SELECT: {
      sqlite3TreeViewLine(pView, "SELECT-expr flags=0x%x", pExpr->flags);
      sqlite3TreeViewSelect(pView, pExpr->x.pSelect, 0);
      break;
    }
    case TK_IN: {
      sqlite3TreeViewLine(pView, "IN flags=0x%x", pExpr->flags);
      sqlite3TreeViewExpr(pView, pExpr->pLeft, 1);
      if( ExprHasProperty(pExpr, EP_xIsSelect) ){
        sqlite3TreeViewSelect(pView, pExpr->x.pSelect, 0);
      }else{
        sqlite3TreeViewExprList(pView, pExpr->x.pList, 0, 0);
      }
      break;