From 9ecf8955737cfd1b1feb3421240389b439ba3759 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Thu, 25 Apr 2013 07:26:39 +0200
Subject: Add schema_catalog::drop_schema(), control schema dropping in
 create_schema()

---
 odb/schema-catalog.cxx | 28 ++++++++++++++++++++++------
 odb/schema-catalog.hxx |  9 ++++++---
 2 files changed, 28 insertions(+), 9 deletions(-)

diff --git a/odb/schema-catalog.cxx b/odb/schema-catalog.cxx
index 52b612f..9599afe 100644
--- a/odb/schema-catalog.cxx
+++ b/odb/schema-catalog.cxx
@@ -42,7 +42,7 @@ namespace odb
   }
 
   void schema_catalog::
-  create_schema (database& db, const string& name)
+  create_schema (database& db, const string& name, bool drop)
   {
     const schema_catalog_impl& c (*schema_catalog_init::catalog);
     schema_catalog_impl::const_iterator i (c.find (key (db.id (), name)));
@@ -52,11 +52,12 @@ namespace odb
 
     const create_functions& fs (i->second.create);
 
+    if (drop)
+      drop_schema (db, name);
+
     // Run the passes until we ran them all or all the functions
-    // return false, which means no more passes necessary. Do that
-    // first for drop passes, then for create.
+    // return false, which means no more passes necessary.
     //
-
     for (unsigned short pass (1); pass < 3; ++pass)
     {
       bool done (true);
@@ -64,14 +65,29 @@ namespace odb
       for (create_functions::const_iterator j (fs.begin ()), e (fs.end ());
            j != e; ++j)
       {
-        if ((*j) (db, pass, true))
+        if ((*j) (db, pass, false))
           done = false;
       }
 
       if (done)
         break;
     }
+  }
+
+  void schema_catalog::
+  drop_schema (database& db, const string& name)
+  {
+    const schema_catalog_impl& c (*schema_catalog_init::catalog);
+    schema_catalog_impl::const_iterator i (c.find (key (db.id (), name)));
 
+    if (i == c.end ())
+      throw unknown_schema (name);
+
+    const create_functions& fs (i->second.create);
+
+    // Run the passes until we ran them all or all the functions
+    // return false, which means no more passes necessary.
+    //
     for (unsigned short pass (1); pass < 3; ++pass)
     {
       bool done (true);
@@ -79,7 +95,7 @@ namespace odb
       for (create_functions::const_iterator j (fs.begin ()), e (fs.end ());
            j != e; ++j)
       {
-        if ((*j) (db, pass, false))
+        if ((*j) (db, pass, true))
           done = false;
       }
 
diff --git a/odb/schema-catalog.hxx b/odb/schema-catalog.hxx
index da6b767..a186de4 100644
--- a/odb/schema-catalog.hxx
+++ b/odb/schema-catalog.hxx
@@ -21,7 +21,10 @@ namespace odb
     // Schema creation.
     //
     static void
-    create_schema (database&, const std::string& name = "");
+    create_schema (database&, const std::string& name = "", bool drop = true);
+
+    static void
+    drop_schema (database&, const std::string& name = "");
 
     // Schema migration.
     //
@@ -76,13 +79,13 @@ namespace odb
     // Test for presence of a schema with a specific name.
     //
     static bool
-    exists (const database& db, const std::string& name)
+    exists (const database& db, const std::string& name = "")
     {
       return exists (db.id (), name);
     }
 
     static bool
-    exists (database_id, const std::string& name);
+    exists (database_id, const std::string& name = "");
 
   private:
     enum migrate_mode
-- 
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