OmniSciDB  2c44a3935d
RelAlgExecutionUnit.h File Reference

Execution unit for relational algebra. It's a low-level description of any relational algebra operation in a format understood by our VM. More...

#include "../Shared/sqldefs.h"
#include "Descriptors/InputDescriptors.h"
#include "ThriftHandler/QueryState.h"
#include <list>
#include <memory>
#include <optional>
#include <vector>
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Classes

struct  SortInfo
 
struct  JoinCondition
 
struct  RelAlgExecutionUnit
 
struct  TableFunctionExecutionUnit
 

Namespaces

 Analyzer
 

Typedefs

using JoinQualsPerNestingLevel = std::vector< JoinCondition >
 
using ResultSetPtr = std::shared_ptr< ResultSet >
 

Enumerations

enum  SortAlgorithm { SortAlgorithm::Default, SortAlgorithm::SpeculativeTopN, SortAlgorithm::StreamingTopN }
 

Functions

std::ostream & operator<< (std::ostream &os, const RelAlgExecutionUnit &ra_exe_unit)
 
std::string ra_exec_unit_desc_for_caching (const RelAlgExecutionUnit &ra_exe_unit)
 

Detailed Description

Execution unit for relational algebra. It's a low-level description of any relational algebra operation in a format understood by our VM.

Author
Alex Suhan alex@.nosp@m.mapd.nosp@m..com Copyright (c) 2016 MapD Technologies, Inc. All rights reserved.

Definition in file RelAlgExecutionUnit.h.

Typedef Documentation

◆ JoinQualsPerNestingLevel

Definition at line 60 of file RelAlgExecutionUnit.h.

◆ ResultSetPtr

using ResultSetPtr = std::shared_ptr<ResultSet>

Definition at line 93 of file RelAlgExecutionUnit.h.

Enumeration Type Documentation

◆ SortAlgorithm

enum SortAlgorithm
strong
Enumerator
Default 
SpeculativeTopN 
StreamingTopN 

Definition at line 38 of file RelAlgExecutionUnit.h.

Function Documentation

◆ operator<<()

std::ostream& operator<< ( std::ostream &  os,
const RelAlgExecutionUnit ra_exe_unit 
)

Definition at line 1243 of file Execute.cpp.

References bool_to_string(), RelAlgExecutionUnit::estimator, anonymous_namespace{Execute.cpp}::expr_container_to_string(), RelAlgExecutionUnit::groupby_exprs, RelAlgExecutionUnit::input_col_descs, join(), RelAlgExecutionUnit::join_quals, anonymous_namespace{Execute.cpp}::join_type_to_string(), RelAlgExecutionUnit::quals, RelAlgExecutionUnit::scan_limit, RelAlgExecutionUnit::simple_quals, anonymous_namespace{Execute.cpp}::sort_algorithm_to_string(), RelAlgExecutionUnit::sort_info, RelAlgExecutionUnit::target_exprs, to_string(), RelAlgExecutionUnit::union_all, and RelAlgExecutionUnit::use_bump_allocator.

1243  {
1244  os << "\n\tTable/Col/Levels: ";
1245  for (const auto& input_col_desc : ra_exe_unit.input_col_descs) {
1246  const auto& scan_desc = input_col_desc->getScanDesc();
1247  os << "(" << scan_desc.getTableId() << ", " << input_col_desc->getColId() << ", "
1248  << scan_desc.getNestLevel() << ") ";
1249  }
1250  if (!ra_exe_unit.simple_quals.empty()) {
1251  os << "\n\tSimple Quals: "
1253  ", ");
1254  }
1255  if (!ra_exe_unit.quals.empty()) {
1256  os << "\n\tQuals: "
1257  << boost::algorithm::join(expr_container_to_string(ra_exe_unit.quals), ", ");
1258  }
1259  if (!ra_exe_unit.join_quals.empty()) {
1260  os << "\n\tJoin Quals: ";
1261  for (size_t i = 0; i < ra_exe_unit.join_quals.size(); i++) {
1262  const auto& join_condition = ra_exe_unit.join_quals[i];
1263  os << "\t\t" << std::to_string(i) << " "
1264  << join_type_to_string(join_condition.type);
1265  os << boost::algorithm::join(expr_container_to_string(join_condition.quals), ", ");
1266  }
1267  }
1268  if (!ra_exe_unit.groupby_exprs.empty()) {
1269  os << "\n\tGroup By: "
1271  ", ");
1272  }
1273  os << "\n\tProjected targets: "
1275  os << "\n\tHas Estimator: " << bool_to_string(ra_exe_unit.estimator == nullptr);
1276  os << "\n\tSort Info: ";
1277  const auto& sort_info = ra_exe_unit.sort_info;
1278  os << "\n\t Order Entries: "
1279  << boost::algorithm::join(expr_container_to_string(sort_info.order_entries), ", ");
1280  os << "\n\t Algorithm: " << sort_algorithm_to_string(sort_info.algorithm);
1281  os << "\n\t Limit: " << std::to_string(sort_info.limit);
1282  os << "\n\t Offset: " << std::to_string(sort_info.offset);
1283  os << "\n\tScan Limit: " << std::to_string(ra_exe_unit.scan_limit);
1284  os << "\n\tBump Allocator: " << bool_to_string(ra_exe_unit.use_bump_allocator);
1285  if (ra_exe_unit.union_all) {
1286  os << "\n\tUnion: " << std::string(*ra_exe_unit.union_all ? "UNION ALL" : "UNION");
1287  }
1288  return os;
1289 }
std::vector< Analyzer::Expr * > target_exprs
const std::optional< bool > union_all
std::string join(T const &container, std::string const &delim)
std::string join_type_to_string(const JoinType type)
Definition: Execute.cpp:1164
const std::list< std::shared_ptr< Analyzer::Expr > > groupby_exprs
std::string to_string(char const *&&v)
const SortInfo sort_info
const JoinQualsPerNestingLevel join_quals
std::string bool_to_string(const bool val)
const std::shared_ptr< Analyzer::Estimator > estimator
std::string sort_algorithm_to_string(const SortAlgorithm algorithm)
Definition: Execute.cpp:1177
std::vector< std::string > expr_container_to_string(const std::list< Analyzer::OrderEntry > &expr_container)
Definition: Execute.cpp:1155
std::list< std::shared_ptr< Analyzer::Expr > > quals
std::list< std::shared_ptr< const InputColDescriptor > > input_col_descs
std::list< std::shared_ptr< Analyzer::Expr > > simple_quals
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◆ ra_exec_unit_desc_for_caching()

std::string ra_exec_unit_desc_for_caching ( const RelAlgExecutionUnit ra_exe_unit)

Definition at line 1192 of file Execute.cpp.

References bool_to_string(), RelAlgExecutionUnit::estimator, RelAlgExecutionUnit::groupby_exprs, RelAlgExecutionUnit::input_col_descs, RelAlgExecutionUnit::join_quals, anonymous_namespace{Execute.cpp}::join_type_to_string(), RelAlgExecutionUnit::quals, RelAlgExecutionUnit::scan_limit, RelAlgExecutionUnit::simple_quals, RelAlgExecutionUnit::target_exprs, and to_string().

Referenced by RelAlgExecutor::executeWorkUnit().

1192  {
1193  // todo(yoonmin): replace a cache key as a DAG representation of a query plan
1194  // instead of ra_exec_unit description if possible
1195  std::ostringstream os;
1196  for (const auto& input_col_desc : ra_exe_unit.input_col_descs) {
1197  const auto& scan_desc = input_col_desc->getScanDesc();
1198  os << scan_desc.getTableId() << "," << input_col_desc->getColId() << ","
1199  << scan_desc.getNestLevel();
1200  }
1201  if (!ra_exe_unit.simple_quals.empty()) {
1202  for (const auto& qual : ra_exe_unit.simple_quals) {
1203  if (qual) {
1204  os << qual->toString() << ",";
1205  }
1206  }
1207  }
1208  if (!ra_exe_unit.quals.empty()) {
1209  for (const auto& qual : ra_exe_unit.quals) {
1210  if (qual) {
1211  os << qual->toString() << ",";
1212  }
1213  }
1214  }
1215  if (!ra_exe_unit.join_quals.empty()) {
1216  for (size_t i = 0; i < ra_exe_unit.join_quals.size(); i++) {
1217  const auto& join_condition = ra_exe_unit.join_quals[i];
1218  os << std::to_string(i) << join_type_to_string(join_condition.type);
1219  for (const auto& qual : join_condition.quals) {
1220  if (qual) {
1221  os << qual->toString() << ",";
1222  }
1223  }
1224  }
1225  }
1226  if (!ra_exe_unit.groupby_exprs.empty()) {
1227  for (const auto& qual : ra_exe_unit.groupby_exprs) {
1228  if (qual) {
1229  os << qual->toString() << ",";
1230  }
1231  }
1232  }
1233  for (const auto& expr : ra_exe_unit.target_exprs) {
1234  if (expr) {
1235  os << expr->toString() << ",";
1236  }
1237  }
1238  os << bool_to_string(ra_exe_unit.estimator == nullptr);
1239  os << std::to_string(ra_exe_unit.scan_limit);
1240  return os.str();
1241 }
std::vector< Analyzer::Expr * > target_exprs
std::string join_type_to_string(const JoinType type)
Definition: Execute.cpp:1164
const std::list< std::shared_ptr< Analyzer::Expr > > groupby_exprs
std::string to_string(char const *&&v)
const JoinQualsPerNestingLevel join_quals
std::string bool_to_string(const bool val)
const std::shared_ptr< Analyzer::Estimator > estimator
std::list< std::shared_ptr< Analyzer::Expr > > quals
std::list< std::shared_ptr< const InputColDescriptor > > input_col_descs
std::list< std::shared_ptr< Analyzer::Expr > > simple_quals
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