Updating vtable example, "BestIndex" method (#1099)

dvas0004 · web-flow · commit 4b8633cceb34 · 2022-10-18T19:04:52.000-04:00
As it was, the vtable example will give an error when adding any kind of SQL constraint in the SQL statement. Updating the BestIndex method will ensure that adding SQL constraints will not result in errors

Signed-off-by: David Vassallo &lt;davevassallo@gmail.com&gt;

Signed-off-by: David Vassallo &lt;davevassallo@gmail.com&gt;
diff --git a/_example/vtable/vtable.go b/_example/vtable/vtable.go
@@ -63,7 +63,12 @@ func (v *ghRepoTable) Open() (sqlite3.VTabCursor, error) {
 }
 
 func (v *ghRepoTable) BestIndex(cst []sqlite3.InfoConstraint, ob []sqlite3.InfoOrderBy) (*sqlite3.IndexResult, error) {
-	return &sqlite3.IndexResult{}, nil
+	used := make([]bool, len(csts))
+	return &sqlite3.IndexResult{
+		IdxNum: 0,
+		IdxStr: "default",
+		Used:   used,
+	}, nil
 }
 
 func (v *ghRepoTable) Disconnect() error { return nil }

Original file line number	Diff line number	Diff line change
`@@ -63,7 +63,12 @@ func (v *ghRepoTable) Open() (sqlite3.VTabCursor, error) {`
`63`	`63`	`}`
`64`	`64`
`65`	`65`	`func (v ghRepoTable) BestIndex(cst []sqlite3.InfoConstraint, ob []sqlite3.InfoOrderBy) (sqlite3.IndexResult, error) {`
`66`		`- return &sqlite3.IndexResult{}, nil`
	`66`	`+ used := make([]bool, len(csts))`
	`67`	`+ return &sqlite3.IndexResult{`
	`68`	`+ IdxNum: 0,`
	`69`	`+ IdxStr: "default",`
	`70`	`+ Used: used,`
	`71`	`+ }, nil`
`67`	`72`	`}`
`68`	`73`
`69`	`74`	`func (v *ghRepoTable) Disconnect() error { return nil }`