Parser::DropTableStmt Class Reference

#include <ParserNode.h>

Inheritance diagram for Parser::DropTableStmt:

Collaboration diagram for Parser::DropTableStmt:

Public Member Functions
	DropTableStmt (std::string *tab, bool i)
	DropTableStmt (const rapidjson::Value &payload)
const std::string *	get_table () const
void	execute (const Catalog_Namespace::SessionInfo &session, bool read_only_mode) override
Public Member Functions inherited from Parser::DDLStmt
void	setColumnDescriptor (ColumnDescriptor &cd, const ColumnDef *coldef)
Public Member Functions inherited from Parser::Node
virtual	~Node ()

Private Attributes
std::unique_ptr< std::string >	table_
bool	if_exists_

Detailed Description

Definition at line 1222 of file ParserNode.h.

Constructor & Destructor Documentation

Parser::DropTableStmt::DropTableStmt ( std::string *  tab, bool  i  )

inline

Definition at line 1224 of file ParserNode.h.

: table_(tab), if_exists_(i) {}

Parser::DropTableStmt::DropTableStmt

(

const rapidjson::Value &

payload

)

Definition at line 4427 of file ParserNode.cpp.

References CHECK, if_exists_, json_bool(), json_str(), and table_.

                                                          {
  CHECK(payload.HasMember("tableName"));
  table_ = std::make_unique<std::string>(json_str(payload["tableName"]));

  if_exists_ = false;
  if (payload.HasMember("ifExists")) {
    if_exists_ = json_bool(payload["ifExists"]);
  }
}

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Member Function Documentation

void Parser::DropTableStmt::execute ( const Catalog_Namespace::SessionInfo &  session, bool  read_only_mode  )

overridevirtual

Implements Parser::DDLStmt.

Definition at line 4437 of file ParserNode.cpp.

References CHECK, Catalog_Namespace::SessionInfo::checkDBAccessPrivileges(), Executor::clearExternalCaches(), AccessPrivileges::DROP_TABLE, legacylockmgr::ExecutorOuterLock, Catalog_Namespace::SessionInfo::getCatalog(), legacylockmgr::LockMgr< MutexType, KeyType >::getMutex(), lockmgr::TableLockMgrImpl< TableDataLockMgr >::getReadLockForTable(), lockmgr::TableLockMgrImpl< TableDataLockMgr >::getWriteLockForTable(), if_exists_, ddl_utils::TABLE, table_, TableDBObjectType, and ddl_utils::validate_table_type().

Referenced by heavydb.cursor.Cursor::executemany().

                                                 {
  if (read_only_mode) {
    throw std::runtime_error("DROP TABLE invalid in read only mode.");
  }
  // Because we are able to acquire a unique_lock on the table descriptor to be dropped we
  // can get away with only using a shared_lock on the executor, as anything that will
  // touch the table being dropped with block, but other transactions are ok.
  const auto execute_read_lock =
      heavyai::shared_lock<legacylockmgr::WrapperType<heavyai::shared_mutex>>(
          *legacylockmgr::LockMgr<heavyai::shared_mutex, bool>::getMutex(
              legacylockmgr::ExecutorOuterLock, true));
  auto& catalog = session.getCatalog();
  const TableDescriptor* td{nullptr};
  std::unique_ptr<lockmgr::TableSchemaLockContainer<lockmgr::WriteLock>> td_with_lock;
  try {
    td_with_lock =
        std::make_unique<lockmgr::TableSchemaLockContainer<lockmgr::WriteLock>>(
            lockmgr::TableSchemaLockContainer<lockmgr::WriteLock>::acquireTableDescriptor(
                catalog, *table_, false));
    td = (*td_with_lock)();
  } catch (const std::runtime_error& e) {
    if (if_exists_) {
      return;
    } else {
      throw e;
    }
  }

  CHECK(td);
  CHECK(td_with_lock);

  // check access privileges
  if (!session.checkDBAccessPrivileges(
          DBObjectType::TableDBObjectType, AccessPrivileges::DROP_TABLE, *table_)) {
    throw std::runtime_error("Table " + *table_ +
                             " will not be dropped. User has no proper privileges.");
  }

  ddl_utils::validate_table_type(td, ddl_utils::TableType::TABLE, "DROP");

  {
    auto table_data_read_lock =
        lockmgr::TableDataLockMgr::getReadLockForTable(catalog, *table_);
    Executor::clearExternalCaches(false, td, catalog.getCurrentDB().dbId);
  }

  auto table_data_write_lock =
      lockmgr::TableDataLockMgr::getWriteLockForTable(catalog, *table_);
  catalog.dropTable(td);
}

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const std::string* Parser::DropTableStmt::get_table ( ) const

inline

Definition at line 1227 of file ParserNode.h.

References table_.

{ return table_.get(); }

Member Data Documentation

bool Parser::DropTableStmt::if_exists_

private

Definition at line 1233 of file ParserNode.h.

Referenced by DropTableStmt(), and execute().

std::unique_ptr<std::string> Parser::DropTableStmt::table_

private

Definition at line 1232 of file ParserNode.h.

Referenced by DropTableStmt(), execute(), and get_table().

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The documentation for this class was generated from the following files:

• /home/jenkins-slave/workspace/core-os-doxygen/Parser/ParserNode.h
• /home/jenkins-slave/workspace/core-os-doxygen/Parser/ParserNode.cpp