Support #$ query interpolation

.gitignore

@@ -4,6 +4,7 @@ Relate.sublime-workspace
 .history
 .idea*
 lib_managed/*
+.DS_Store
 
 #built files
 target/*

src/main/scala/com/lucidchart/open/relate/interp/InterpolatedQuery.scala

@@ -3,6 +3,8 @@ package com.lucidchart.open.relate.interp
 import com.lucidchart.open.relate.Sql
 import java.sql.PreparedStatement
 
+import scala.collection.mutable.ListBuffer
+
 class InterpolatedQuery(protected val parsedQuery: String, protected val params: Seq[Parameter]) extends Sql with MultipleParameter {
 
   def +(query: InterpolatedQuery) = new InterpolatedQuery(parsedQuery + query.parsedQuery, params ++ query.params)
@@ -17,12 +19,20 @@ object InterpolatedQuery {
 
   def fromParts(parts: Seq[String], params: Seq[Parameter]) = {
     val stringBuilder = new StringBuilder()
+    val listBuf = new ListBuffer[Parameter]()
+
     parts.zip(params).foreach { case (part, param) =>
-      stringBuilder ++= part
-      param.appendPlaceholders(stringBuilder)
+      if (part.length > 0 && part.takeRight(1) == "#") {
+        stringBuilder ++= part.dropRight(1)
+        stringBuilder ++= param.toString
+      } else {
+        stringBuilder ++= part
+        param.appendPlaceholders(stringBuilder)
+        listBuf += param
+      }
     }
     stringBuilder ++= parts.last
-    new InterpolatedQuery(stringBuilder.toString(), params)
+    new InterpolatedQuery(stringBuilder.toString(), listBuf)
   }
 
 }

src/main/scala/com/lucidchart/open/relate/interp/Parameters.scala

@@ -260,6 +260,7 @@ class SqlXmlParameter(value: SQLXML) extends SingleParameter {
 
 class StringParameter(value: String) extends SingleParameter {
   protected def set(statement: PreparedStatement, i: Int) = statement.setString(i, value)
+  override def toString(): String = value
 }
 
 class TimeParameter(value: Time) extends SingleParameter {