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Add the TK_IF_NULL_ROW opcode to deal with non-NULL result columns in the

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result set of a view or subquery on the RHS of a LEFT JOIN that gets flattened.

FossilOrigin-Name: 3a5860d86fadcf924316707918bf283d26c53b1473e5e67f5cff59d18c2a7742
This commit is contained in:
drh
2017-04-14 19:03:10 +00:00
parent 399c7e21e4
commit 31d6fd5507
9 changed files with 83 additions and 47 deletions
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5
src/treeview.c
View File

@@ -470,6 +470,11 @@ void sqlite3TreeViewExpr(TreeView *pView, const Expr *pExpr, u8 moreToFollow){
sqlite3TreeViewSelect(pView, pExpr->pLeft->x.pSelect, 0);
break;
}
case TK_IF_NULL_ROW: {
sqlite3TreeViewLine(pView, "IF-NULL-ROW %d", pExpr->iTable);
sqlite3TreeViewExpr(pView, pExpr->pLeft, 0);
break;
}
default: {
sqlite3TreeViewLine(pView, "op=%d", pExpr->op);
break;