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MCOL-406 Improved Information Schema

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* Add INFORMATION_SCHEMA.COLUMNSTORE_FILES which contains information
  about files
* Remove file information from COLUMNSTORE_EXTENTS (due to above)
* Hide columns with Object ID < 3000 (internal columns)
* Fix bad calculation in data_size columns
* Fix minor memory leak
* Add compressedSize() function to IDBFileSystem to get the used file
  size for a compressed file
* Add columnstore_info schema with utility stored procedures to access
  the information_schema tables
This commit is contained in:
Andrew Hutchings
2016-11-23 22:11:26 +00:00
parent 606284ad63
commit 3b1de94cd8
13 changed files with 422 additions and 28 deletions
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163
dbcon/mysql/is_columnstore_files.cpp Normal file
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/* c-basic-offset: 4; tab-width: 4; indent-tabs-mode: nil
* vi: set shiftwidth=4 tabstop=4 expandtab:
* :indentSize=4:tabSize=4:noTabs=true:
*
* Copyright (C) 2016 MariaDB Corporaton
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; version 2 of
* the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
#include "idb_mysql.h"
#include "dbrm.h"
#include "objectidmanager.h"
#include "we_convertor.h"
#include "we_define.h"
#include "IDBPolicy.h"
#include "we_config.h"
#include "we_brm.h"
// Required declaration as it isn't in a MairaDB include
bool schema_table_store_record(THD *thd, TABLE *table);
ST_FIELD_INFO is_columnstore_files_fields[] =
{
{"OBJECT_ID", 11, MYSQL_TYPE_LONG, 0, 0, 0, 0},
{"SEGMENT_ID", 11, MYSQL_TYPE_LONG, 0, 0, 0, 0},
{"PARTITION_ID", 11, MYSQL_TYPE_LONG, 0, 0, 0, 0},
{"FILENAME", 1024, MYSQL_TYPE_STRING, 0, 0, 0, 0},
{"FILE_SIZE", 19, MYSQL_TYPE_LONGLONG, 0, MY_I_S_MAYBE_NULL, 0, 0},
{"COMPRESSED_DATA_SIZE", 19, MYSQL_TYPE_LONGLONG, 0, MY_I_S_MAYBE_NULL, 0, 0},
{0, 0, MYSQL_TYPE_NULL, 0, 0, 0, 0}
};
static bool is_columnstore_files_get_entries(THD *thd, TABLE_LIST *tables, BRM::OID_t oid, std::vector<struct BRM::EMEntry> &entries)
{
CHARSET_INFO *cs = system_charset_info;
TABLE *table = tables->table;
char oidDirName[WriteEngine::FILE_NAME_SIZE];
char fullFileName[WriteEngine::FILE_NAME_SIZE];
char dbDir[WriteEngine::MAX_DB_DIR_LEVEL][WriteEngine::MAX_DB_DIR_NAME_SIZE];
WriteEngine::Config config;
config.initConfigCache();
std::vector<struct BRM::EMEntry>::const_iterator iter = entries.begin();
while ( iter != entries.end() ) //organize extents into files
{
// Don't include files more than once at different block offsets
if (iter->blockOffset > 0)
{
iter++;
continue;
}
table->field[0]->store(oid);
table->field[1]->store(iter->segmentNum);
table->field[2]->store(iter->partitionNum);
WriteEngine::Convertor::oid2FileName(oid, oidDirName, dbDir, iter->partitionNum, iter->segmentNum);
snprintf(fullFileName, WriteEngine::FILE_NAME_SIZE, "%s/%s", WriteEngine::Config::getDBRootByNum(iter->dbRoot).c_str(), oidDirName);
table->field[3]->store(fullFileName, strlen(fullFileName), cs);
if (idbdatafile::IDBPolicy::exists(fullFileName))
{
table->field[4]->set_notnull();
table->field[4]->store(idbdatafile::IDBPolicy::size(fullFileName));
off64_t comp_size;
if ((comp_size = idbdatafile::IDBPolicy::compressedSize(fullFileName)) != -1)
{
table->field[5]->set_notnull();
table->field[5]->store(comp_size);
}
else
{
table->field[5]->set_null();
}
}
else
{
table->field[4]->set_null();
table->field[5]->set_null();
}
if (schema_table_store_record(thd, table))
return 1;
iter++;
}
return 0;
}
static int is_columnstore_files_fill(THD *thd, TABLE_LIST *tables, COND *cond)
{
BRM::DBRM *emp = new BRM::DBRM();
std::vector<struct BRM::EMEntry> entries;
if (!emp || !emp->isDBRMReady())
{
return 1;
}
execplan::ObjectIDManager oidm;
BRM::OID_t MaxOID = oidm.size();
for(BRM::OID_t oid = 3000; oid <= MaxOID; oid++)
{
emp->getExtents(oid, entries, false, false, true);
if (entries.size() == 0)
continue;
if (is_columnstore_files_get_entries(thd, tables, oid, entries))
{
delete emp;
return 1;
}
}
delete emp;
return 0;
}
static int is_columnstore_files_plugin_init(void *p)
{
ST_SCHEMA_TABLE *schema = (ST_SCHEMA_TABLE*) p;
schema->fields_info = is_columnstore_files_fields;
schema->fill_table = is_columnstore_files_fill;
return 0;
}
static struct st_mysql_information_schema is_columnstore_files_plugin_version =
{ MYSQL_INFORMATION_SCHEMA_INTERFACE_VERSION };
maria_declare_plugin(is_columnstore_files_plugin)
{
MYSQL_INFORMATION_SCHEMA_PLUGIN,
&is_columnstore_files_plugin_version,
"COLUMNSTORE_FILES",
"MariaDB Corporaton",
"An information schema plugin to list ColumnStore filess",
PLUGIN_LICENSE_GPL,
is_columnstore_files_plugin_init,
//is_columnstore_files_plugin_deinit,
NULL,
0x0100,
NULL,
NULL,
"1.0",
MariaDB_PLUGIN_MATURITY_STABLE
}
maria_declare_plugin_end;