Drizzled Public API Documentation

drop_schema.cc
1 /* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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4  * Copyright (C) 2009 Sun Microsystems, Inc.
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20 
21 #include <config.h>
22 
23 #include <drizzled/show.h>
24 #include <drizzled/session.h>
25 #include <drizzled/statement/drop_schema.h>
26 #include <drizzled/plugin/event_observer.h>
27 #include <drizzled/sql_lex.h>
28 #include <drizzled/schema.h>
29 #include <drizzled/catalog/instance.h>
30 
31 #include <string>
32 
33 using namespace std;
34 
35 namespace drizzled {
36 
37 bool statement::DropSchema::execute()
38 {
39  if (session().inTransaction())
40  {
41  my_error(ER_TRANSACTIONAL_DDL_NOT_SUPPORTED, MYF(0));
42  return true;
43  }
44 
45  identifier::Schema schema_identifier(session().catalog().identifier(),
46  to_string(lex().name));
47 
48  if (not schema::check(session(), schema_identifier))
49  {
50  my_error(ER_WRONG_DB_NAME, schema_identifier);
51  return false;
52  }
53 
54  if (session().inTransaction())
55  {
56  my_message(ER_LOCK_OR_ACTIVE_TRANSACTION, ER(ER_LOCK_OR_ACTIVE_TRANSACTION), MYF(0));
57  return true;
58  }
59 
60  bool res = true;
61  std::string path = schema_identifier.getSQLPath();
62  if (unlikely(plugin::EventObserver::beforeDropDatabase(session(), path)))
63  {
64  my_error(ER_EVENT_OBSERVER_PLUGIN, schema_identifier);
65  }
66  else
67  {
68  res= schema::drop(session(), schema_identifier, drop_if_exists);
69  if (unlikely(plugin::EventObserver::afterDropDatabase(session(), path, res)))
70  {
71  my_error(ER_EVENT_OBSERVER_PLUGIN, MYF(0), path.c_str());
72  res = false;
73  }
74 
75  }
76 
77  return res;
78 }
79 
80 } /* namespace drizzled */