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deba5d2a1036d6237da2ebd1ab3c4b2889a3982f
mariadb-columnstore-engine/dbcon/mysql/is_columnstore_columns.cpp
Andrew Hutchings 443a2867c4 MCOL-1385 Initial 10.3 support
2018-08-02 14:55:01 +01:00

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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 <vector>
#include <limits>
#include <boost/shared_ptr.hpp>
#include "calpontsystemcatalog.h"
#include "dataconvert.h"
#include "exceptclasses.h"
using namespace logging;
// Required declaration as it isn't in a MairaDB include
bool schema_table_store_record(THD* thd, TABLE* table);
ST_FIELD_INFO is_columnstore_columns_fields[] =
{
{"TABLE_SCHEMA", 64, MYSQL_TYPE_STRING, 0, 0, 0, 0},
{"TABLE_NAME", 64, MYSQL_TYPE_STRING, 0, 0, 0, 0},
{"COLUMN_NAME", 64, MYSQL_TYPE_STRING, 0, 0, 0, 0},
{"OBJECT_ID", 11, MYSQL_TYPE_LONG, 0, 0, 0, 0},
{"DICTIONARY_OBJECT_ID", 11, MYSQL_TYPE_LONG, 0, MY_I_S_MAYBE_NULL, 0, 0},
{"LIST_OBJECT_ID", 11, MYSQL_TYPE_LONG, 0, MY_I_S_MAYBE_NULL, 0, 0},
{"TREE_OBJECT_ID", 11, MYSQL_TYPE_LONG, 0, MY_I_S_MAYBE_NULL, 0, 0},
{"DATA_TYPE", 64, MYSQL_TYPE_STRING, 0, 0, 0, 0},
{"COLUMN_LENGTH", 11, MYSQL_TYPE_LONG, 0, 0, 0, 0},
{"COLUMN_POSITION", 11, MYSQL_TYPE_LONG, 0, 0, 0, 0},
{"COLUMN_DEFAULT", 0, MYSQL_TYPE_LONG_BLOB, 0, MY_I_S_MAYBE_NULL, 0, 0},
{"IS_NULLABLE", 1, MYSQL_TYPE_TINY, 0, 0, 0, 0},
{"NUMERIC_PRECISION", 11, MYSQL_TYPE_LONG, 0, 0, 0, 0},
{"NUMERIC_SCALE", 11, MYSQL_TYPE_LONG, 0, 0, 0, 0},
{"IS_AUTOINCREMENT", 1, MYSQL_TYPE_TINY, 0, 0, 0, 0},
{"COMPRESSION_TYPE", 64, MYSQL_TYPE_STRING, 0, 0, 0, 0},
{0, 0, MYSQL_TYPE_NULL, 0, 0, 0, 0}
};
static void get_cond_item(Item_func* item, String** table, String** db)
{
char tmp_char[MAX_FIELD_WIDTH];
Item_field* item_field = (Item_field*) item->arguments()[0]->real_item();
if (strcasecmp(item_field->field_name.str, "table_name") == 0)
{
String str_buf(tmp_char, sizeof(tmp_char), system_charset_info);
*table = item->arguments()[1]->val_str(&str_buf);
return;
}
else if (strcasecmp(item_field->field_name.str, "table_schema") == 0)
{
String str_buf(tmp_char, sizeof(tmp_char), system_charset_info);
*db = item->arguments()[1]->val_str(&str_buf);
return;
}
}
static void get_cond_items(COND* cond, String** table, String** db)
{
if (cond->type() == Item::FUNC_ITEM)
{
Item_func* fitem = (Item_func*) cond;
if (fitem->arguments()[0]->real_item()->type() == Item::FIELD_ITEM &&
fitem->arguments()[1]->const_item())
{
get_cond_item(fitem, table, db);
}
}
else if ((cond->type() == Item::COND_ITEM) && (((Item_cond*) cond)->functype() == Item_func::COND_AND_FUNC))
{
List_iterator<Item> li(*((Item_cond*) cond)->argument_list());
Item* item;
while ((item = li++))
{
if (item->type() == Item::FUNC_ITEM)
{
get_cond_item((Item_func*)item, table, db);
}
else
{
get_cond_items(item, table, db);
}
}
}
}
static int is_columnstore_columns_fill(THD* thd, TABLE_LIST* tables, COND* cond)
{
CHARSET_INFO* cs = system_charset_info;
TABLE* table = tables->table;
String* table_name = NULL;
String* db_name = NULL;
boost::shared_ptr<execplan::CalpontSystemCatalog> systemCatalogPtr =
execplan::CalpontSystemCatalog::makeCalpontSystemCatalog(execplan::CalpontSystemCatalog::idb_tid2sid(thd->thread_id));
const std::vector< std::pair<execplan::CalpontSystemCatalog::OID, execplan::CalpontSystemCatalog::TableName> > catalog_tables
= systemCatalogPtr->getTables();
systemCatalogPtr->identity(execplan::CalpontSystemCatalog::FE);
if (cond)
{
get_cond_items(cond, &table_name, &db_name);
}
for (std::vector<std::pair<execplan::CalpontSystemCatalog::OID, execplan::CalpontSystemCatalog::TableName> >::const_iterator it = catalog_tables.begin();
it != catalog_tables.end(); ++it)
{
if (db_name)
{
if ((*it).second.schema.compare(db_name->ptr()) != 0)
{
continue;
}
}
if (table_name)
{
if ((*it).second.table.compare(table_name->ptr()) != 0)
{
continue;
}
}
execplan::CalpontSystemCatalog::RIDList column_rid_list;
// Note a table may get dropped as you iterate over the list of tables.
// So simply ignore the dropped table.
try
{
column_rid_list = systemCatalogPtr->columnRIDs((*it).second, true);
}
catch (IDBExcept& ex)
{
if (ex.errorCode() == ERR_TABLE_NOT_IN_CATALOG)
{
continue;
}
else
{
return 1;
}
}
for (size_t col_num = 0; col_num < column_rid_list.size(); col_num++)
{
execplan::CalpontSystemCatalog::TableColName tcn = systemCatalogPtr->colName(column_rid_list[col_num].objnum);
execplan::CalpontSystemCatalog::ColType ct = systemCatalogPtr->colType(column_rid_list[col_num].objnum);
table->field[0]->store(tcn.schema.c_str(), tcn.schema.length(), cs);
table->field[1]->store(tcn.table.c_str(), tcn.table.length(), cs);
table->field[2]->store(tcn.column.c_str(), tcn.column.length(), cs);
table->field[3]->store(column_rid_list[col_num].objnum);
if (ct.ddn.dictOID == std::numeric_limits<int32_t>::min())
{
table->field[4]->set_null();
}
else
{
table->field[4]->set_notnull();
table->field[4]->store(ct.ddn.dictOID);
}
if (ct.ddn.listOID == std::numeric_limits<int32_t>::min())
{
table->field[5]->set_null();
}
else
{
table->field[5]->set_notnull();
table->field[5]->store(ct.ddn.listOID);
}
if (ct.ddn.treeOID == std::numeric_limits<int32_t>::min())
{
table->field[6]->set_null();
}
else
{
table->field[6]->set_notnull();
table->field[6]->store(ct.ddn.treeOID);
}
std::string data_type = execplan::colDataTypeToString(ct.colDataType);
table->field[7]->store(data_type.c_str(), data_type.length(), cs);
table->field[8]->store(ct.colWidth);
table->field[9]->store(ct.colPosition);
if (ct.defaultValue.empty())
{
table->field[10]->set_null();
}
else
{
table->field[10]->set_notnull();
table->field[10]->store(ct.defaultValue.c_str(), ct.defaultValue.length(), cs);
}
table->field[11]->store(ct.autoincrement);
table->field[12]->store(ct.precision);
table->field[13]->store(ct.scale);
if (ct.constraintType != execplan::CalpontSystemCatalog::NOTNULL_CONSTRAINT)
{
table->field[14]->store(true);
}
else
{
table->field[14]->store(false);
}
std::string compression_type;
switch (ct.compressionType)
{
case 0:
compression_type = "None";
break;
case 2:
compression_type = "Snappy";
break;
default:
compression_type = "Unknown";
break;
}
table->field[15]->store(compression_type.c_str(), compression_type.length(), cs);
if (schema_table_store_record(thd, table))
return 1;
}
}
return 0;
}
static int is_columnstore_columns_plugin_init(void* p)
{
ST_SCHEMA_TABLE* schema = (ST_SCHEMA_TABLE*) p;
schema->fields_info = is_columnstore_columns_fields;
schema->fill_table = is_columnstore_columns_fill;
return 0;
}
static struct st_mysql_information_schema is_columnstore_columns_plugin_version =
{ MYSQL_INFORMATION_SCHEMA_INTERFACE_VERSION };
maria_declare_plugin(is_columnstore_columns_plugin)
{
MYSQL_INFORMATION_SCHEMA_PLUGIN,
&is_columnstore_columns_plugin_version,
"COLUMNSTORE_COLUMNS",
"MariaDB Corporaton",
"An information schema plugin to list ColumnStore columns",
PLUGIN_LICENSE_GPL,
is_columnstore_columns_plugin_init,
//is_columnstore_tables_plugin_deinit,
NULL,
0x0100,
NULL,
NULL,
"1.0",
MariaDB_PLUGIN_MATURITY_STABLE
}
maria_declare_plugin_end;
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