Parser::AlterTableParamStmt Class Reference

#include <ParserNode.h>

Inheritance diagram for Parser::AlterTableParamStmt:

Collaboration diagram for Parser::AlterTableParamStmt:

Public Member Functions
	AlterTableParamStmt (std::string *tab, NameValueAssign *p)
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_
std::unique_ptr< NameValueAssign >	param_

Detailed Description

Definition at line 1396 of file ParserNode.h.

Constructor & Destructor Documentation

Parser::AlterTableParamStmt::AlterTableParamStmt ( std::string *  tab, NameValueAssign *  p  )

inline

Definition at line 1398 of file ParserNode.h.

: table_(tab), param_(p) {}

Member Function Documentation

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

overridevirtual

Implements Parser::DDLStmt.

Definition at line 5635 of file ParserNode.cpp.

References Parser::check_alter_table_privilege(), Executor::clearExternalCaches(), Parser::IntLiteral::get_intval(), Catalog_Namespace::SessionInfo::getCatalog(), legacylockmgr::getExecuteReadLock(), TableDescriptor::isView, param_, table_, table_is_temporary(), TableDescriptor::tableId, to_lower(), and UNREACHABLE.

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

                                                       {
  if (read_only_mode) {
    throw std::runtime_error("ALTER TABLE invalid in read only mode.");
  }
  enum TableParamType { MaxRollbackEpochs, Epoch, MaxRows };
  static const std::unordered_map<std::string, TableParamType> param_map = {
      {"max_rollback_epochs", TableParamType::MaxRollbackEpochs},
      {"epoch", TableParamType::Epoch},
      {"max_rows", TableParamType::MaxRows}};
  const auto execute_read_lock = legacylockmgr::getExecuteReadLock();
  auto& catalog = session.getCatalog();
  const auto td_with_lock =
      lockmgr::TableSchemaLockContainer<lockmgr::WriteLock>::acquireTableDescriptor(
          catalog, *table_, false);
  const auto td = td_with_lock();
  if (!td) {
    throw std::runtime_error("Table " + *table_ + " does not exist.");
  }
  if (td->isView) {
    throw std::runtime_error("Setting parameters for a view is not supported.");
  }
  if (table_is_temporary(td)) {
    throw std::runtime_error(
        "Setting parameters for a temporary table is not yet supported.");
  }
  check_alter_table_privilege(session, td);

  // invalidate cached item
  Executor::clearExternalCaches(true, td, catalog.getDatabaseId());

  std::string param_name(*param_->get_name());
  boost::algorithm::to_lower(param_name);
  const IntLiteral* val_int_literal =
      dynamic_cast<const IntLiteral*>(param_->get_value());
  if (val_int_literal == nullptr) {
    throw std::runtime_error("Table parameters should be integers.");
  }
  const int64_t param_val = val_int_literal->get_intval();

  const auto param_it = param_map.find(param_name);
  if (param_it == param_map.end()) {
    throw std::runtime_error(param_name + " is not a settable table parameter.");
  }
  switch (param_it->second) {
    case MaxRollbackEpochs: {
      catalog.setMaxRollbackEpochs(td->tableId, param_val);
      break;
    }
    case Epoch: {
      catalog.setTableEpoch(catalog.getDatabaseId(), td->tableId, param_val);
      break;
    }
    case MaxRows: {
      catalog.setMaxRows(td->tableId, param_val);
      break;
    }
    default: {
      UNREACHABLE() << "Unexpected TableParamType value: " << param_it->second
                    << ", key: " << param_it->first;
    }
  }
}

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Member Data Documentation

std::unique_ptr<NameValueAssign> Parser::AlterTableParamStmt::param_

private

Definition at line 1404 of file ParserNode.h.

Referenced by execute().

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

private

Definition at line 1403 of file ParserNode.h.

Referenced by execute().

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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