Drizzled Public API Documentation

data_dictionary_schema.h

00001 /* 
00002  * Copyright (C) 2010 Djellel Eddine Difallah
00003  * All rights reserved.
00004  *
00005  * Redistribution and use in source and binary forms, with or without
00006  * modification, are permitted provided that the following conditions are met:
00007  *
00008  *   * Redistributions of source code must retain the above copyright notice,
00009  *     this list of conditions and the following disclaimer.
00010  *   * Redistributions in binary form must reproduce the above copyright notice,
00011  *     this list of conditions and the following disclaimer in the documentation
00012  *     and/or other materials provided with the distribution.
00013  *   * Neither the name of Djellel Eddine Difallah nor the names of its contributors
00014  *     may be used to endorse or promote products derived from this software
00015  *     without specific prior written permission.
00016  *
00017  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
00018  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00019  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00020  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
00021  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
00022  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
00023  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
00024  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
00025  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
00026  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
00027  * THE POSSIBILITY OF SUCH DAMAGE.
00028  */
00029 
00030 #pragma once
00031 
00032 #include <drizzled/plugin/table_function.h>
00033 #include <drizzled/field.h>
00034 
00035 namespace drizzled
00036 {
00037 class QueryCacheService;
00038 
00039 class QueryCacheTool : public drizzled::plugin::TableFunction
00040 {
00041 public:
00042 
00043   QueryCacheTool();
00044 
00045   class Generator : public drizzled::plugin::TableFunction::Generator
00046   {
00047   public:
00048     Generator(drizzled::Field **arg);
00049     bool populate();
00050   private:
00051     QueryCacheService::CacheEntries::iterator it;
00052     QueryCacheService::CacheEntries::iterator end;
00053   };
00054 
00055   Generator *generator(drizzled::Field **arg)
00056   {
00057     return new Generator(arg);
00058   }
00059 };
00060 
00061 class CachedTables : public drizzled::plugin::TableFunction
00062 {
00063 public:
00064 
00065   CachedTables();
00066 
00067   class Generator : public drizzled::plugin::TableFunction::Generator
00068   {
00069   public:
00070     Generator(drizzled::Field **arg);
00071     bool populate();
00072   private:
00073     QueryCacheService::CachedTablesEntries::iterator it;
00074     QueryCacheService::CachedTablesEntries::iterator end;
00075   };
00076 
00077   Generator *generator(drizzled::Field **arg)
00078   {
00079     return new Generator(arg);
00080   }
00081 };
00082 
00083 class QueryCacheStatusTool : public drizzled::plugin::TableFunction
00084 {
00085 public:
00086   QueryCacheStatusTool() :
00087     plugin::TableFunction("DATA_DICTIONARY", "QUERY_CACHE_STATUS")
00088   {
00089     add_field("VARIABLE_NAME");
00090     add_field("VARIABLE_VALUE");
00091   }
00092 
00093   class Generator : public drizzled::plugin::TableFunction::Generator 
00094   {
00095     drizzled::drizzle_sys_var **status_var_ptr;
00096 
00097   public:
00098     Generator(drizzled::Field **fields);
00099 
00100     bool populate();
00101   };
00102 
00103   Generator *generator(drizzled::Field **arg)
00104   {
00105     return new Generator(arg);
00106   }
00107 };
00108 }