Analyzer::CaseExpr Class Reference

#include <Analyzer.h>

Inheritance diagram for Analyzer::CaseExpr:

Collaboration diagram for Analyzer::CaseExpr:

Public Member Functions
	CaseExpr (const SQLTypeInfo &ti, bool has_agg, const std::list< std::pair< std::shared_ptr< Analyzer::Expr >, std::shared_ptr< Analyzer::Expr >>> &w, std::shared_ptr< Analyzer::Expr > e)
const std::list< std::pair < std::shared_ptr < Analyzer::Expr > , std::shared_ptr < Analyzer::Expr > > > &	get_expr_pair_list () const
const Expr *	get_else_expr () const
std::shared_ptr< Analyzer::Expr >	deep_copy () const override
void	check_group_by (const std::list< std::shared_ptr< Analyzer::Expr >> &groupby) const override
void	group_predicates (std::list< const Expr * > &scan_predicates, std::list< const Expr * > &join_predicates, std::list< const Expr * > &const_predicates) const override
void	collect_rte_idx (std::set< int > &rte_idx_set) const override
void	collect_column_var (std::set< const ColumnVar *, bool(*)(const ColumnVar *, const ColumnVar *)> &colvar_set, bool include_agg) const override
std::shared_ptr< Analyzer::Expr >	rewrite_with_targetlist (const std::vector< std::shared_ptr< TargetEntry >> &tlist) const override
std::shared_ptr< Analyzer::Expr >	rewrite_with_child_targetlist (const std::vector< std::shared_ptr< TargetEntry >> &tlist) const override
std::shared_ptr< Analyzer::Expr >	rewrite_agg_to_var (const std::vector< std::shared_ptr< TargetEntry >> &tlist) const override
bool	operator== (const Expr &rhs) const override
std::string	toString () const override
void	find_expr (std::function< bool(const Expr *)> f, std::list< const Expr * > &expr_list) const override
std::shared_ptr< Analyzer::Expr >	add_cast (const SQLTypeInfo &new_type_info) override
void	get_domain (DomainSet &domain_set) const override
Public Member Functions inherited from Analyzer::Expr
	Expr (SQLTypes t, bool notnull)
	Expr (SQLTypes t, int d, bool notnull)
	Expr (SQLTypes t, int d, int s, bool notnull)
	Expr (const SQLTypeInfo &ti, bool has_agg=false)
virtual	~Expr ()
std::shared_ptr< Analyzer::Expr >	get_shared_ptr ()
const SQLTypeInfo &	get_type_info () const
void	set_type_info (const SQLTypeInfo &ti)
bool	get_contains_agg () const
void	set_contains_agg (bool a)
virtual std::shared_ptr < Analyzer::Expr >	normalize_simple_predicate (int &rte_idx) const
virtual size_t	get_num_column_vars (const bool include_agg) const
virtual void	print () const
virtual void	add_unique (std::list< const Expr * > &expr_list) const
std::shared_ptr< Analyzer::Expr >	decompress ()

Private Attributes
std::list< std::pair < std::shared_ptr < Analyzer::Expr > , std::shared_ptr < Analyzer::Expr > > >	expr_pair_list
std::shared_ptr< Analyzer::Expr >	else_expr

Additional Inherited Members
Protected Attributes inherited from Analyzer::Expr
SQLTypeInfo	type_info
bool	contains_agg

Detailed Description

Definition at line 1374 of file Analyzer.h.

Constructor & Destructor Documentation

Analyzer::CaseExpr::CaseExpr ( const SQLTypeInfo &  ti, bool  has_agg, const std::list< std::pair< std::shared_ptr< Analyzer::Expr >, std::shared_ptr< Analyzer::Expr >>> &  w, std::shared_ptr< Analyzer::Expr >  e  )

inline

Definition at line 1376 of file Analyzer.h.

      : Expr(ti, has_agg), expr_pair_list(w), else_expr(e) {}

Member Function Documentation

std::shared_ptr< Analyzer::Expr > Analyzer::CaseExpr::add_cast ( const SQLTypeInfo &  new_type_info )

overridevirtual

Reimplemented from Analyzer::Expr.

Definition at line 1460 of file Analyzer.cpp.

References shared::StringDictKey::dict_id, else_expr, expr_pair_list, SQLTypeInfo::get_comp_param(), SQLTypeInfo::get_compression(), SQLTypeInfo::getStringDictKey(), SQLTypeInfo::is_string(), shared::StringDictKey::isTransientDict(), kENCODING_DICT, kENCODING_NONE, SQLTypeInfo::set_comp_param(), SQLTypeInfo::setStringDictKey(), TRANSIENT_DICT, TRANSIENT_DICT_ID, and Analyzer::Expr::type_info.

                                                                               {
  SQLTypeInfo ti = new_type_info;
  if (new_type_info.is_string() && new_type_info.get_compression() == kENCODING_DICT &&
      new_type_info.getStringDictKey().isTransientDict() && type_info.is_string() &&
      type_info.get_compression() == kENCODING_NONE &&
      type_info.getStringDictKey().dict_id > TRANSIENT_DICT_ID) {
    ti.set_comp_param(TRANSIENT_DICT(type_info.get_comp_param()));
    auto dict_key = type_info.getStringDictKey();
    dict_key.dict_id = TRANSIENT_DICT(dict_key.dict_id);
    ti.setStringDictKey(dict_key);
  }

  std::list<std::pair<std::shared_ptr<Analyzer::Expr>, std::shared_ptr<Analyzer::Expr>>>
      new_expr_pair_list;
  for (auto& p : expr_pair_list) {
    new_expr_pair_list.emplace_back(
        std::make_pair(p.first, p.second->deep_copy()->add_cast(ti)));
  }

  if (else_expr != nullptr) {
    else_expr = else_expr->add_cast(ti);
  }
  // Replace the current WHEN THEN pair list once we are sure all casts have succeeded
  expr_pair_list = new_expr_pair_list;

  type_info = ti;
  return shared_from_this();
}

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void Analyzer::CaseExpr::check_group_by ( const std::list< std::shared_ptr< Analyzer::Expr >> &  groupby ) const

overridevirtual

Reimplemented from Analyzer::Expr.

Definition at line 3592 of file Analyzer.cpp.

References else_expr, and expr_pair_list.

                                                               {
  for (auto p : expr_pair_list) {
    p.first->check_group_by(groupby);
    p.second->check_group_by(groupby);
  }
  if (else_expr != nullptr) {
    else_expr->check_group_by(groupby);
  }
}

void Analyzer::CaseExpr::collect_column_var ( std::set< const ColumnVar *, bool(*)(const ColumnVar *, const ColumnVar *)> &  colvar_set, bool  include_agg  ) const

overridevirtual

Reimplemented from Analyzer::Expr.

Definition at line 3528 of file Analyzer.cpp.

References else_expr, and expr_pair_list.

                            {
  for (auto p : expr_pair_list) {
    p.first->collect_column_var(colvar_set, include_agg);
    p.second->collect_column_var(colvar_set, include_agg);
  }
  if (else_expr != nullptr) {
    else_expr->collect_column_var(colvar_set, include_agg);
  }
}

void Analyzer::CaseExpr::collect_rte_idx ( std::set< int > &  rte_idx_set ) const

overridevirtual

Reimplemented from Analyzer::Expr.

Definition at line 3480 of file Analyzer.cpp.

References else_expr, and expr_pair_list.

                                                             {
  for (auto p : expr_pair_list) {
    p.first->collect_rte_idx(rte_idx_set);
    p.second->collect_rte_idx(rte_idx_set);
  }
  if (else_expr != nullptr) {
    else_expr->collect_rte_idx(rte_idx_set);
  }
}

std::shared_ptr< Analyzer::Expr > Analyzer::CaseExpr::deep_copy ( ) const

overridevirtual

Implements Analyzer::Expr.

Definition at line 199 of file Analyzer.cpp.

References Analyzer::Expr::contains_agg, else_expr, expr_pair_list, and Analyzer::Expr::type_info.

                                                      {
  std::list<std::pair<std::shared_ptr<Analyzer::Expr>, std::shared_ptr<Analyzer::Expr>>>
      new_list;
  for (auto p : expr_pair_list) {
    new_list.emplace_back(p.first->deep_copy(), p.second->deep_copy());
  }
  return makeExpr<CaseExpr>(type_info,
                            contains_agg,
                            new_list,
                            else_expr == nullptr ? nullptr : else_expr->deep_copy());
}

void Analyzer::CaseExpr::find_expr ( std::function< bool(const Expr *)>  f, std::list< const Expr * > &  expr_list  ) const

overridevirtual

Reimplemented from Analyzer::Expr.

Definition at line 3416 of file Analyzer.cpp.

References Analyzer::Expr::add_unique(), else_expr, expr_pair_list, and f().

                                                                {
  if (f(this)) {
    add_unique(expr_list);
    return;
  }
  for (auto p : expr_pair_list) {
    p.first->find_expr(f, expr_list);
    p.second->find_expr(f, expr_list);
  }
  if (else_expr != nullptr) {
    else_expr->find_expr(f, expr_list);
  }
}

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void Analyzer::CaseExpr::get_domain ( DomainSet &  domain_set ) const

overridevirtual

Reimplemented from Analyzer::Expr.

Definition at line 3625 of file Analyzer.cpp.

References Analyzer::Expr::add_unique(), else_expr, expr_pair_list, and kCAST.

                                                     {
  for (const auto& p : expr_pair_list) {
    const auto c = std::dynamic_pointer_cast<const Constant>(p.second);
    if (c != nullptr) {
      c->add_unique(domain_set);
    } else {
      const auto v = std::dynamic_pointer_cast<const ColumnVar>(p.second);
      if (v != nullptr) {
        v->add_unique(domain_set);
      } else {
        const auto cast = std::dynamic_pointer_cast<const UOper>(p.second);
        if (cast != nullptr && cast->get_optype() == kCAST) {
          const Constant* c = dynamic_cast<const Constant*>(cast->get_operand());
          if (c != nullptr) {
            cast->add_unique(domain_set);
            continue;
          } else {
            const auto v = std::dynamic_pointer_cast<const ColumnVar>(p.second);
            if (v != nullptr) {
              v->add_unique(domain_set);
              continue;
            }
          }
        }
        p.second->get_domain(domain_set);
        if (domain_set.empty()) {
          return;
        }
      }
    }
  }
  if (else_expr != nullptr) {
    const auto c = std::dynamic_pointer_cast<const Constant>(else_expr);
    if (c != nullptr) {
      c->add_unique(domain_set);
    } else {
      const auto v = std::dynamic_pointer_cast<const ColumnVar>(else_expr);
      if (v != nullptr) {
        v->add_unique(domain_set);
      } else {
        const auto cast = std::dynamic_pointer_cast<const UOper>(else_expr);
        if (cast != nullptr && cast->get_optype() == kCAST) {
          const Constant* c = dynamic_cast<const Constant*>(cast->get_operand());
          if (c != nullptr) {
            c->add_unique(domain_set);
          } else {
            const auto v = std::dynamic_pointer_cast<const ColumnVar>(else_expr);
            if (v != nullptr) {
              v->add_unique(domain_set);
            }
          }
        } else {
          else_expr->get_domain(domain_set);
        }
      }
    }
  }
}

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const Expr* Analyzer::CaseExpr::get_else_expr ( ) const

inline

Definition at line 1387 of file Analyzer.h.

References else_expr.

Referenced by CodeGenerator::codegen(), getExpressionRange(), anonymous_namespace{WindowExpressionRewrite.cpp}::matches_else_null(), operator==(), ScalarExprToSql::visitCaseExpr(), DeepCopyVisitor::visitCaseExpr(), and ScalarExprVisitor< std::set< shared::TableKey > >::visitCaseExpr().

{ return else_expr.get(); }

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const std::list< std::pair<std::shared_ptr<Analyzer::Expr>, std::shared_ptr<Analyzer::Expr> > >& Analyzer::CaseExpr::get_expr_pair_list ( ) const

inline

Definition at line 1384 of file Analyzer.h.

References expr_pair_list.

Referenced by CodeGenerator::codegenCase(), getExpressionRange(), operator==(), rewrite_sum_window(), ScalarExprToSql::visitCaseExpr(), DeepCopyVisitor::visitCaseExpr(), and ScalarExprVisitor< std::set< shared::TableKey > >::visitCaseExpr().

                             {
    return expr_pair_list;
  }

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void Analyzer::CaseExpr::group_predicates ( std::list< const Expr * > &  scan_predicates, std::list< const Expr * > &  join_predicates, std::list< const Expr * > &  const_predicates  ) const

overridevirtual

Reimplemented from Analyzer::Expr.

Definition at line 1885 of file Analyzer.cpp.

References else_expr, and expr_pair_list.

                                                                              {
  std::set<int> rte_idx_set;
  for (auto p : expr_pair_list) {
    p.first->collect_rte_idx(rte_idx_set);
    p.second->collect_rte_idx(rte_idx_set);
  }
  if (else_expr != nullptr) {
    else_expr->collect_rte_idx(rte_idx_set);
  }
  if (rte_idx_set.size() > 1) {
    join_predicates.push_back(this);
  } else if (rte_idx_set.size() == 1) {
    scan_predicates.push_back(this);
  } else {
    const_predicates.push_back(this);
  }
}

bool Analyzer::CaseExpr::operator== ( const Expr &  rhs ) const

overridevirtual

Implements Analyzer::Expr.

Definition at line 2577 of file Analyzer.cpp.

References else_expr, expr_pair_list, get_else_expr(), and get_expr_pair_list().

                                               {
  if (typeid(rhs) != typeid(CaseExpr)) {
    return false;
  }
  const CaseExpr& rhs_ce = dynamic_cast<const CaseExpr&>(rhs);
  if (expr_pair_list.size() != rhs_ce.get_expr_pair_list().size()) {
    return false;
  }
  if ((else_expr == nullptr && rhs_ce.get_else_expr() != nullptr) ||
      (else_expr != nullptr && rhs_ce.get_else_expr() == nullptr)) {
    return false;
  }
  auto it = rhs_ce.get_expr_pair_list().cbegin();
  for (auto p : expr_pair_list) {
    if (!(*p.first == *it->first) || !(*p.second == *it->second)) {
      return false;
    }
    ++it;
  }
  return else_expr == nullptr ||
         (else_expr != nullptr && *else_expr == *rhs_ce.get_else_expr());
}

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std::shared_ptr< Analyzer::Expr > Analyzer::CaseExpr::rewrite_agg_to_var ( const std::vector< std::shared_ptr< TargetEntry >> &  tlist ) const

overridevirtual

Reimplemented from Analyzer::Expr.

Definition at line 2220 of file Analyzer.cpp.

References Analyzer::Expr::contains_agg, else_expr, expr_pair_list, and Analyzer::Expr::type_info.

                                                              {
  std::list<std::pair<std::shared_ptr<Analyzer::Expr>, std::shared_ptr<Analyzer::Expr>>>
      epair_list;
  for (auto p : expr_pair_list) {
    epair_list.emplace_back(p.first->rewrite_agg_to_var(tlist),
                            p.second->rewrite_agg_to_var(tlist));
  }
  return makeExpr<CaseExpr>(type_info,
                            contains_agg,
                            epair_list,
                            else_expr ? else_expr->rewrite_agg_to_var(tlist) : nullptr);
}

std::shared_ptr< Analyzer::Expr > Analyzer::CaseExpr::rewrite_with_child_targetlist ( const std::vector< std::shared_ptr< TargetEntry >> &  tlist ) const

overridevirtual

Reimplemented from Analyzer::Expr.

Definition at line 2177 of file Analyzer.cpp.

References Analyzer::Expr::contains_agg, else_expr, expr_pair_list, and Analyzer::Expr::type_info.

                                                              {
  std::list<std::pair<std::shared_ptr<Analyzer::Expr>, std::shared_ptr<Analyzer::Expr>>>
      epair_list;
  for (auto p : expr_pair_list) {
    epair_list.emplace_back(p.first->rewrite_with_child_targetlist(tlist),
                            p.second->rewrite_with_child_targetlist(tlist));
  }
  return makeExpr<CaseExpr>(
      type_info,
      contains_agg,
      epair_list,
      else_expr ? else_expr->rewrite_with_child_targetlist(tlist) : nullptr);
}

std::shared_ptr< Analyzer::Expr > Analyzer::CaseExpr::rewrite_with_targetlist ( const std::vector< std::shared_ptr< TargetEntry >> &  tlist ) const

overridevirtual

Reimplemented from Analyzer::Expr.

Definition at line 2134 of file Analyzer.cpp.

References Analyzer::Expr::contains_agg, else_expr, expr_pair_list, and Analyzer::Expr::type_info.

                                                              {
  std::list<std::pair<std::shared_ptr<Analyzer::Expr>, std::shared_ptr<Analyzer::Expr>>>
      epair_list;
  for (auto p : expr_pair_list) {
    epair_list.emplace_back(p.first->rewrite_with_targetlist(tlist),
                            p.second->rewrite_with_targetlist(tlist));
  }
  return makeExpr<CaseExpr>(
      type_info,
      contains_agg,
      epair_list,
      else_expr ? else_expr->rewrite_with_targetlist(tlist) : nullptr);
}

std::string Analyzer::CaseExpr::toString ( ) const

overridevirtual

Implements Analyzer::Expr.

Definition at line 3070 of file Analyzer.cpp.

References else_expr, and expr_pair_list.

                                   {
  std::string str{"CASE "};
  for (auto p : expr_pair_list) {
    str += "(";
    str += p.first->toString();
    str += ", ";
    str += p.second->toString();
    str += ") ";
  }
  if (else_expr) {
    str += "ELSE ";
    str += else_expr->toString();
  }
  str += " END ";
  return str;
}

Member Data Documentation

std::shared_ptr<Analyzer::Expr> Analyzer::CaseExpr::else_expr

private

Definition at line 1417 of file Analyzer.h.

Referenced by add_cast(), check_group_by(), collect_column_var(), collect_rte_idx(), deep_copy(), find_expr(), get_domain(), get_else_expr(), group_predicates(), operator==(), rewrite_agg_to_var(), rewrite_with_child_targetlist(), rewrite_with_targetlist(), and toString().

std::list<std::pair<std::shared_ptr<Analyzer::Expr>, std::shared_ptr<Analyzer::Expr> > > Analyzer::CaseExpr::expr_pair_list

private

Definition at line 1414 of file Analyzer.h.

Referenced by add_cast(), check_group_by(), collect_column_var(), collect_rte_idx(), deep_copy(), find_expr(), get_domain(), get_expr_pair_list(), group_predicates(), operator==(), rewrite_agg_to_var(), rewrite_with_child_targetlist(), rewrite_with_targetlist(), and toString().

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

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