dolphin: Implement parameter refs (#621)

* dolphin: Implement parameter refs

* Fix parameter generation

Author: kyleconroy

internal/debug/dump.go

@@ -1,9 +1,19 @@
 package debug
 
 import (
+	"os"
+
 	"github.com/davecgh/go-spew/spew"
 )
 
+var Active bool
+
+func init() {
+	Active = os.Getenv("SQLCDEBUG") != ""
+}
+
 func Dump(n interface{}) {
-	spew.Dump(n)
+	if Active {
+		spew.Dump(n)
+	}
 }

internal/endtoend/testdata/params_two/mysql/go/db.go

@@ -0,0 +1,5 @@
+CREATE TABLE foo (a text, b text);
+
+/* name: FooByAandB :many */
+SELECT a, b FROM foo 
+WHERE a = ? and b = ?;

internal/endtoend/testdata/params_two/mysql/go/models.go

@@ -0,0 +1,12 @@
+{
+  "version": "1",
+  "packages": [
+    {
+      "engine": "_dolphin",
+      "path": "go",
+      "name": "querytest",
+      "schema": "query.sql",
+      "queries": "query.sql"
+    }
+  ]
+}

internal/endtoend/testdata/params_two/mysql/go/query.sql.go

@@ -0,0 +1,5 @@
+CREATE TABLE foo (a text, b text);
+
+-- name: FooByAandB :many
+SELECT a, b FROM foo 
+WHERE a = $1 and b = $2;