CardinalityCacheKey Struct Reference

#include <Execute.h>

Collaboration diagram for CardinalityCacheKey:

Public Member Functions
	CardinalityCacheKey (const RelAlgExecutionUnit &ra_exe_unit)
bool	operator== (const CardinalityCacheKey &other) const
size_t	hash () const
bool	containsTableKey (const shared::TableKey &table_key) const

Private Attributes
std::string	key
std::unordered_set < shared::TableKey >	table_keys

Detailed Description

Definition at line 392 of file Execute.h.

Constructor & Destructor Documentation

CardinalityCacheKey::CardinalityCacheKey

(

const RelAlgExecutionUnit &

ra_exe_unit

)

Definition at line 1960 of file Execute.cpp.

References RelAlgExecutionUnit::estimator, RelAlgExecutionUnit::groupby_exprs, RelAlgExecutionUnit::input_col_descs, RelAlgExecutionUnit::join_quals, RelAlgExecutionUnit::quals, RelAlgExecutionUnit::scan_limit, RelAlgExecutionUnit::simple_quals, RelAlgExecutionUnit::target_exprs, to_string(), and toString().

                                                                               {
  // todo(yoonmin): replace a cache key as a DAG representation of a query plan
  // instead of ra_exec_unit description if possible
  std::ostringstream os;
  for (const auto& input_col_desc : ra_exe_unit.input_col_descs) {
    const auto& scan_desc = input_col_desc->getScanDesc();
    os << scan_desc.getTableKey() << "," << input_col_desc->getColId() << ","
       << scan_desc.getNestLevel();
    table_keys.emplace(scan_desc.getTableKey());
  }
  if (!ra_exe_unit.simple_quals.empty()) {
    for (const auto& qual : ra_exe_unit.simple_quals) {
      if (qual) {
        os << qual->toString() << ",";
      }
    }
  }
  if (!ra_exe_unit.quals.empty()) {
    for (const auto& qual : ra_exe_unit.quals) {
      if (qual) {
        os << qual->toString() << ",";
      }
    }
  }
  if (!ra_exe_unit.join_quals.empty()) {
    for (size_t i = 0; i < ra_exe_unit.join_quals.size(); i++) {
      const auto& join_condition = ra_exe_unit.join_quals[i];
      os << std::to_string(i) << ::toString(join_condition.type);
      for (const auto& qual : join_condition.quals) {
        if (qual) {
          os << qual->toString() << ",";
        }
      }
    }
  }
  if (!ra_exe_unit.groupby_exprs.empty()) {
    for (const auto& qual : ra_exe_unit.groupby_exprs) {
      if (qual) {
        os << qual->toString() << ",";
      }
    }
  }
  for (const auto& expr : ra_exe_unit.target_exprs) {
    if (expr) {
      os << expr->toString() << ",";
    }
  }
  os << ::toString(ra_exe_unit.estimator == nullptr);
  os << std::to_string(ra_exe_unit.scan_limit);
  key = os.str();
}

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Member Function Documentation

bool CardinalityCacheKey::containsTableKey

(

const shared::TableKey &

table_key

)

const

Definition at line 2020 of file Execute.cpp.

                                                                                {
  return table_keys.find(table_key) != table_keys.end();
}

size_t CardinalityCacheKey::hash

(

)

const

Definition at line 2016 of file Execute.cpp.

References hash_value().

Referenced by std::hash< CardinalityCacheKey >::operator()().

                                       {
  return boost::hash_value(key);
}

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bool CardinalityCacheKey::operator==

(

const CardinalityCacheKey &

other

)

const

Definition at line 2012 of file Execute.cpp.

References key.

                                                                           {
  return key == other.key;
}

Member Data Documentation

std::string CardinalityCacheKey::key

private

Definition at line 402 of file Execute.h.

Referenced by operator==().

std::unordered_set<shared::TableKey> CardinalityCacheKey::table_keys

private

Definition at line 403 of file Execute.h.

---

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

• /home/jenkins-slave/workspace/core-os-doxygen/QueryEngine/Execute.h
• /home/jenkins-slave/workspace/core-os-doxygen/QueryEngine/Execute.cpp