From 350bfdb5ea9b4f7e50746c50a46d8032cbc5a104 Mon Sep 17 00:00:00 2001
From: Kelly Rauchenberger <fefferburbia@gmail.com>
Date: Wed, 8 Nov 2017 14:53:26 -0500
Subject: Created database versioning system

Also added an ANALYZE statement to the end of the datafile generation
process. This generates information that allows sqlite to sometimes come
up with a better query plan, and in many cases can significant speed up
queries. This constitutes a minor database update, but because this is
the first version that uses the database versioning system, older
versions are essentially incompatible.

refs #2
---
 lib/database.h | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

(limited to 'lib/database.h')

diff --git a/lib/database.h b/lib/database.h
index ef5ff87..efb54e1 100644
--- a/lib/database.h
+++ b/lib/database.h
@@ -3,6 +3,7 @@
 
 #include <string>
 #include <exception>
+#include <stdexcept>
 #include <list>
 #include <set>
 #include "notion.h"
@@ -45,6 +46,18 @@ namespace verbly {
 
     ~database();
 
+    // Information
+
+    int getMajorVersion() const
+    {
+      return major_;
+    }
+
+    int getMinorVersion() const
+    {
+      return minor_;
+    }
+
     // Queries
 
     query<notion> notions(filter where, order sortOrder = {}, int limit = 1) const;
@@ -69,6 +82,37 @@ namespace verbly {
 
     sqlite3* ppdb_ = nullptr;
 
+    int major_;
+    int minor_;
+
+  };
+
+  class database_version_mismatch : public std::logic_error {
+  public:
+
+    database_version_mismatch(int right, int wrong) :
+      std::logic_error(generateMessage(right, wrong)),
+      right_(right),
+      wrong_(wrong)
+    {
+    }
+
+    int getRightVersion() const noexcept
+    {
+      return right_;
+    }
+
+    int getWrongVersion() const noexcept
+    {
+      return wrong_;
+    }
+
+  private:
+
+    static std::string generateMessage(int right, int wrong);
+
+    int right_;
+    int wrong_;
   };
 
 };
-- 
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