bigquery: add clustering

third_party/terraform/resources/resource_bigquery_table.go.erb

@@ -303,6 +303,14 @@ func resourceBigQueryTable() *schema.Resource {
 				},
 			},
 
+			// Clustering: [Optional] Ordered set of up to 4 columns for clustering this table.
+			"clustering": &schema.Schema{
+				Type:     schema.TypeList,
+				Optional: true,
+				ForceNew: true,
+				Elem:     &schema.Schema{Type: schema.TypeString},
+			},
+
 			// CreationTime: [Output-only] The time when this table was created, in
 			// milliseconds since the epoch.
 			"creation_time": {
@@ -435,6 +443,13 @@ func resourceTable(d *schema.ResourceData, meta interface{}) (*bigquery.Table, e
 		table.TimePartitioning = expandTimePartitioning(v)
 	}
 
+	if v, ok := d.GetOk("clustering"); ok {
+		table.Clustering = &bigquery.Clustering{
+			Fields: convertStringArr(v.([]interface{})),
+			ForceSendFields: []string{"Fields"},
+		}
+	}
+
 	return table, nil
 }
 
@@ -514,6 +529,10 @@ func resourceBigQueryTableRead(d *schema.ResourceData, meta interface{}) error {
 		}
 	}
 
+	if res.Clustering != nil {
+		d.Set("clustering", res.Clustering.Fields)
+	}
+
 	if res.Schema != nil {
 		schema, err := flattenSchema(res.Schema)
 		if err != nil {

third_party/terraform/tests/resource_bigquery_table_test.go

@@ -178,13 +178,22 @@ resource "google_bigquery_table" "test" {
     type = "DAY"
     field = "ts"
     require_partition_filter = true
-  }
+	}
+	clustering = ["some_number", "some_state"]
 
   schema = <<EOH
 [
   {
     "name": "ts",
     "type": "TIMESTAMP"
+	},
+	{
+		"name": "some_string",
+		"type": "STRING"
+	},
+	{
+		"name": "some_number",
+		"type": "INTEGER"
   },
   {
     "name": "city",