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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 "Descriptors/InputDescriptors.h"
#include "Shared/sqldefs.h"
#include "Shared/toString.h"
#include "TableFunctions/TableFunctionOutputBufferSizeType.h"
#include "TableFunctions/TableFunctionsFactory.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.
Todd Mostak todd@.nosp@m.omni.nosp@m.sci.c.nosp@m.om Copyright (c) 2020 Omnisci, Inc. All rights reserved.

Definition in file RelAlgExecutionUnit.h.

Typedef Documentation

Definition at line 63 of file RelAlgExecutionUnit.h.

using ResultSetPtr = std::shared_ptr<ResultSet>

Definition at line 105 of file RelAlgExecutionUnit.h.

Enumeration Type Documentation

enum SortAlgorithm
strong
Enumerator
Default 
SpeculativeTopN 
StreamingTopN 

Definition at line 41 of file RelAlgExecutionUnit.h.

Function Documentation

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

Definition at line 1242 of file Execute.cpp.

References 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(), toString(), RelAlgExecutionUnit::union_all, and RelAlgExecutionUnit::use_bump_allocator.

1242  {
1243  os << "\n\tTable/Col/Levels: ";
1244  for (const auto& input_col_desc : ra_exe_unit.input_col_descs) {
1245  const auto& scan_desc = input_col_desc->getScanDesc();
1246  os << "(" << scan_desc.getTableId() << ", " << input_col_desc->getColId() << ", "
1247  << scan_desc.getNestLevel() << ") ";
1248  }
1249  if (!ra_exe_unit.simple_quals.empty()) {
1250  os << "\n\tSimple Quals: "
1252  ", ");
1253  }
1254  if (!ra_exe_unit.quals.empty()) {
1255  os << "\n\tQuals: "
1256  << boost::algorithm::join(expr_container_to_string(ra_exe_unit.quals), ", ");
1257  }
1258  if (!ra_exe_unit.join_quals.empty()) {
1259  os << "\n\tJoin Quals: ";
1260  for (size_t i = 0; i < ra_exe_unit.join_quals.size(); i++) {
1261  const auto& join_condition = ra_exe_unit.join_quals[i];
1262  os << "\t\t" << std::to_string(i) << " "
1263  << join_type_to_string(join_condition.type);
1264  os << boost::algorithm::join(expr_container_to_string(join_condition.quals), ", ");
1265  }
1266  }
1267  if (!ra_exe_unit.groupby_exprs.empty()) {
1268  os << "\n\tGroup By: "
1270  ", ");
1271  }
1272  os << "\n\tProjected targets: "
1274  os << "\n\tHas Estimator: " << ::toString(ra_exe_unit.estimator == nullptr);
1275  os << "\n\tSort Info: ";
1276  const auto& sort_info = ra_exe_unit.sort_info;
1277  os << "\n\t Order Entries: "
1278  << boost::algorithm::join(expr_container_to_string(sort_info.order_entries), ", ");
1279  os << "\n\t Algorithm: " << sort_algorithm_to_string(sort_info.algorithm);
1280  os << "\n\t Limit: " << std::to_string(sort_info.limit);
1281  os << "\n\t Offset: " << std::to_string(sort_info.offset);
1282  os << "\n\tScan Limit: " << std::to_string(ra_exe_unit.scan_limit);
1283  os << "\n\tBump Allocator: " << ::toString(ra_exe_unit.use_bump_allocator);
1284  if (ra_exe_unit.union_all) {
1285  os << "\n\tUnion: " << std::string(*ra_exe_unit.union_all ? "UNION ALL" : "UNION");
1286  }
1287  return os;
1288 }
std::vector< Analyzer::Expr * > target_exprs
std::string toString(const ExtArgumentType &sig_type)
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:1163
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::vector< std::string > expr_container_to_string(const T &expr_container)
Definition: Execute.cpp:1141
const std::shared_ptr< Analyzer::Estimator > estimator
std::string sort_algorithm_to_string(const SortAlgorithm algorithm)
Definition: Execute.cpp:1176
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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std::string ra_exec_unit_desc_for_caching ( const RelAlgExecutionUnit ra_exe_unit)

Definition at line 1191 of file Execute.cpp.

References 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, to_string(), and toString().

Referenced by RelAlgExecutor::executeWorkUnit().

1191  {
1192  // todo(yoonmin): replace a cache key as a DAG representation of a query plan
1193  // instead of ra_exec_unit description if possible
1194  std::ostringstream os;
1195  for (const auto& input_col_desc : ra_exe_unit.input_col_descs) {
1196  const auto& scan_desc = input_col_desc->getScanDesc();
1197  os << scan_desc.getTableId() << "," << input_col_desc->getColId() << ","
1198  << scan_desc.getNestLevel();
1199  }
1200  if (!ra_exe_unit.simple_quals.empty()) {
1201  for (const auto& qual : ra_exe_unit.simple_quals) {
1202  if (qual) {
1203  os << qual->toString() << ",";
1204  }
1205  }
1206  }
1207  if (!ra_exe_unit.quals.empty()) {
1208  for (const auto& qual : ra_exe_unit.quals) {
1209  if (qual) {
1210  os << qual->toString() << ",";
1211  }
1212  }
1213  }
1214  if (!ra_exe_unit.join_quals.empty()) {
1215  for (size_t i = 0; i < ra_exe_unit.join_quals.size(); i++) {
1216  const auto& join_condition = ra_exe_unit.join_quals[i];
1217  os << std::to_string(i) << join_type_to_string(join_condition.type);
1218  for (const auto& qual : join_condition.quals) {
1219  if (qual) {
1220  os << qual->toString() << ",";
1221  }
1222  }
1223  }
1224  }
1225  if (!ra_exe_unit.groupby_exprs.empty()) {
1226  for (const auto& qual : ra_exe_unit.groupby_exprs) {
1227  if (qual) {
1228  os << qual->toString() << ",";
1229  }
1230  }
1231  }
1232  for (const auto& expr : ra_exe_unit.target_exprs) {
1233  if (expr) {
1234  os << expr->toString() << ",";
1235  }
1236  }
1237  os << ::toString(ra_exe_unit.estimator == nullptr);
1238  os << std::to_string(ra_exe_unit.scan_limit);
1239  return os.str();
1240 }
std::vector< Analyzer::Expr * > target_exprs
std::string toString(const ExtArgumentType &sig_type)
std::string join_type_to_string(const JoinType type)
Definition: Execute.cpp:1163
const std::list< std::shared_ptr< Analyzer::Expr > > groupby_exprs
std::string to_string(char const *&&v)
const JoinQualsPerNestingLevel join_quals
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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