Use case statement in name function

README.md

@@ -4,19 +4,21 @@ A flamegraph generator for Postgres `EXPLAIN ANALYZE` output.
 
 ## Usage
 
-Generate an annotated query plan in JSON.
+1. Generate a query plan in JSON by prefixing a SQL query with
+`EXPLAIN (ANALYZE, BUFFERS, FORMAT JSON)`. Save the output to a file.
 
 ```
-psql lob_local -qAtc 'EXPLAIN (ANALYZE, BUFFERS, FORMAT JSON) SELECT id FROM bears' > plan.json
+psql lob_local -qAtc 'EXPLAIN (ANALYZE, BUFFERS, FORMAT JSON) SELECT id FROM users' > plan.json
 ```
 
-Generate the flamegraph.
+2. Then generate the flamegraph by passing the JSON as standard input to
+`pg_flame` and direct standard output to a file.
 
 ```
 cat plans.json | ./pg_flame > flamegraph.html
 ```
 
-Open `flamegraph.html` in a browser of your choice.
+3. Open `flamegraph.html` in a browser of your choice.
 
 ## Background
 
@@ -30,9 +32,9 @@ for debugging slow database queries.
 
 Pg_flame is in extension of that work for Postgres query plans. Instead of
 being used to graph CPU time of internal Postgres functions, it generates a
-visual hierarchy to query plans. This visualization identifies the relative
-time of each part of a query plan, helping to direct optimization efforts.
+visual hierarchy of query plans. This visualization identifies the relative
+time of each part of a query plan.
 
 This tool relies on the
-[`d3-flame-graph`](https://github.com/spiermar/d3-flame-graph) plugin to
+[`spiermar/d3-flame-graph`](https://github.com/spiermar/d3-flame-graph) plugin to
 generate the flamegraph.

pkg/html/html.go

@@ -110,15 +110,14 @@ func convertPlanNode(n plan.Node, color string) Flame {
 }
 
 func name(n plan.Node) string {
-	if n.Table != "" && n.Index != "" {
+	switch {
+	case n.Table != "" && n.Index != "":
 		return fmt.Sprintf("%s using %s on %s", n.Method, n.Index, n.Table)
-	}
-
-	if n.Table != "" {
+	case n.Table != "":
 		return fmt.Sprintf("%s on %s", n.Method, n.Table)
+	default:
+		return n.Method
 	}
-
-	return n.Method
 }
 
 func detail(n plan.Node) string {