ShowTablesCommand Class Reference

#include <DdlCommandExecutor.h>

Inheritance diagram for ShowTablesCommand:

Collaboration diagram for ShowTablesCommand:

Public Member Functions
	ShowTablesCommand (const DdlCommandData &ddl_data, std::shared_ptr< Catalog_Namespace::SessionInfo const > session_ptr)
ExecutionResult	execute (bool read_only_mode) override
Public Member Functions inherited from DdlCommand
	DdlCommand (const DdlCommandData &ddl_data, std::shared_ptr< Catalog_Namespace::SessionInfo const > session_ptr)

Additional Inherited Members
Protected Attributes inherited from DdlCommand
const DdlCommandData &	ddl_data_
std::shared_ptr < Catalog_Namespace::SessionInfo const >	session_ptr_

Detailed Description

Definition at line 200 of file DdlCommandExecutor.h.

Constructor & Destructor Documentation

ShowTablesCommand::ShowTablesCommand	(	const DdlCommandData &	ddl_data,
		std::shared_ptr< Catalog_Namespace::SessionInfo const >	session_ptr
	)

Definition at line 1588 of file DdlCommandExecutor.cpp.

    : DdlCommand(ddl_data, session_ptr) {}

Member Function Documentation

ExecutionResult ShowTablesCommand::execute ( bool  read_only_mode )

overridevirtual

Executes the DDL command corresponding to provided JSON payload.

Parameters

_return

result of DDL command execution (if applicable)

Implements DdlCommand.

Definition at line 1593 of file DdlCommandExecutor.cpp.

References ResultSetLogicalValuesBuilder::create(), genLiteralStr(), GET_PHYSICAL_TABLES, legacylockmgr::getExecuteReadLock(), kTEXT, run_benchmark_import::label, and DdlCommand::session_ptr_.

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

                                                              {
  auto execute_read_lock = legacylockmgr::getExecuteReadLock();

  // Get all table names in the same way as OmniSql \t command

  // valid in read_only_mode

  // label_infos -> column labels
  std::vector<std::string> labels{"table_name"};
  std::vector<TargetMetaInfo> label_infos;
  for (const auto& label : labels) {
    label_infos.emplace_back(label, SQLTypeInfo(kTEXT, true));
  }

  // Get all table names
  auto cat_ptr = session_ptr_->get_catalog_ptr();
  auto cur_user = session_ptr_->get_currentUser();
  auto table_names = cat_ptr->getTableNamesForUser(cur_user, GET_PHYSICAL_TABLES);

  // logical_values -> table data
  std::vector<RelLogicalValues::RowValues> logical_values;
  for (auto table_name : table_names) {
    logical_values.emplace_back(RelLogicalValues::RowValues{});
    logical_values.back().emplace_back(genLiteralStr(table_name));
  }

  // Create ResultSet
  std::shared_ptr<ResultSet> rSet = std::shared_ptr<ResultSet>(
      ResultSetLogicalValuesBuilder::create(label_infos, logical_values));

  return ExecutionResult(rSet, label_infos);
}

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

• /home/jenkins-slave/workspace/core-os-doxygen/Catalog/DdlCommandExecutor.h
• /home/jenkins-slave/workspace/core-os-doxygen/Catalog/DdlCommandExecutor.cpp