ShowForeignServersCommand Class Reference

#include <DdlCommandExecutor.h>

Inheritance diagram for ShowForeignServersCommand:

Collaboration diagram for ShowForeignServersCommand:

Public Member Functions
	ShowForeignServersCommand (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 179 of file DdlCommandExecutor.h.

Constructor & Destructor Documentation

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

Definition at line 2540 of file DdlCommandExecutor.cpp.

References CHECK, DdlCommand::ddl_data_, anonymous_namespace{DdlCommandExecutor.cpp}::extractPayload(), and g_enable_fsi.

    : DdlCommand(ddl_data, session_ptr) {
  if (!g_enable_fsi) {
    throw std::runtime_error("Unsupported command: SHOW FOREIGN SERVERS");
  }
  // Verify that members are valid
  auto& ddl_payload = extractPayload(ddl_data_);
  CHECK(ddl_payload.HasMember("command"));
  if (ddl_payload.HasMember("filters")) {
    CHECK(ddl_payload["filters"].IsArray());
    int num_filters = 0;
    for (auto const& filter_def : ddl_payload["filters"].GetArray()) {
      CHECK(filter_def.IsObject());
      CHECK(filter_def.HasMember("attribute"));
      CHECK(filter_def["attribute"].IsString());
      CHECK(filter_def.HasMember("value"));
      CHECK(filter_def["value"].IsString());
      CHECK(filter_def.HasMember("operation"));
      CHECK(filter_def["operation"].IsString());
      if (num_filters > 0) {
        CHECK(filter_def.HasMember("chain"));
        CHECK(filter_def["chain"].IsString());
      } else {
        CHECK(!filter_def.HasMember("chain"));
      }
      num_filters++;
    }
  }
}

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Member Function Documentation

ExecutionResult ShowForeignServersCommand::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 2572 of file DdlCommandExecutor.cpp.

References ResultSetLogicalValuesBuilder::create(), DdlCommand::ddl_data_, anonymous_namespace{DdlCommandExecutor.cpp}::extractFilters(), anonymous_namespace{DdlCommandExecutor.cpp}::extractPayload(), genLiteralStr(), anonymous_namespace{DdlCommandExecutor.cpp}::genLiteralTimestamp(), legacylockmgr::getExecuteReadLock(), kTEXT, kTIMESTAMP, and DdlCommand::session_ptr_.

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

                                                                      {
  auto execute_read_lock = legacylockmgr::getExecuteReadLock();

  // valid in read_only_mode

  std::vector<TargetMetaInfo> label_infos;
  auto& ddl_payload = extractPayload(ddl_data_);

  // label_infos -> column labels
  std::vector<std::string> labels{"server_name", "data_wrapper", "created_at", "options"};
  label_infos.emplace_back(labels[0], SQLTypeInfo(kTEXT, true));
  label_infos.emplace_back(labels[1], SQLTypeInfo(kTEXT, true));
  // created_at is a TIMESTAMP
  label_infos.emplace_back(labels[2], SQLTypeInfo(kTIMESTAMP, true));
  label_infos.emplace_back(labels[3], SQLTypeInfo(kTEXT, true));

  const auto& user = session_ptr_->get_currentUser();

  std::vector<const foreign_storage::ForeignServer*> results;

  session_ptr_->getCatalog().getForeignServersForUser(
      extractFilters(ddl_payload), user, results);

  // logical_values -> table data
  std::vector<RelLogicalValues::RowValues> logical_values;
  for (auto const& server_ptr : results) {
    logical_values.emplace_back(RelLogicalValues::RowValues{});
    logical_values.back().emplace_back(genLiteralStr(server_ptr->name));
    logical_values.back().emplace_back(genLiteralStr(server_ptr->data_wrapper_type));
    logical_values.back().emplace_back(genLiteralTimestamp(server_ptr->creation_time));
    logical_values.back().emplace_back(
        genLiteralStr(server_ptr->getOptionsAsJsonString()));
  }

  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