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Parser::ColumnRef Class Reference

#include <ParserNode.h>

+ Inheritance diagram for Parser::ColumnRef:
+ Collaboration diagram for Parser::ColumnRef:

Public Member Functions

 ColumnRef (std::string *n1)
 
 ColumnRef (std::string *n1, std::string *n2)
 
const std::string * get_table () const
 
const std::string * get_column () const
 
std::shared_ptr< Analyzer::Expranalyze (const Catalog_Namespace::Catalog &catalog, Analyzer::Query &query, TlistRefType allow_tlist_ref=TLIST_NONE) const override
 
std::string to_string () const override
 
- Public Member Functions inherited from Parser::Node
virtual ~Node ()
 

Private Attributes

std::unique_ptr< std::string > table_
 
std::unique_ptr< std::string > column_
 

Additional Inherited Members

- Public Types inherited from Parser::Expr
enum  TlistRefType { TLIST_NONE, TLIST_REF, TLIST_COPY }
 

Detailed Description

Definition at line 626 of file ParserNode.h.

Constructor & Destructor Documentation

Parser::ColumnRef::ColumnRef ( std::string *  n1)
inlineexplicit

Definition at line 628 of file ParserNode.h.

628 : table_(nullptr), column_(n1) {}
std::unique_ptr< std::string > table_
Definition: ParserNode.h:639
std::unique_ptr< std::string > column_
Definition: ParserNode.h:640
Parser::ColumnRef::ColumnRef ( std::string *  n1,
std::string *  n2 
)
inline

Definition at line 629 of file ParserNode.h.

629 : table_(n1), column_(n2) {}
std::unique_ptr< std::string > table_
Definition: ParserNode.h:639
std::unique_ptr< std::string > column_
Definition: ParserNode.h:640

Member Function Documentation

std::shared_ptr< Analyzer::Expr > Parser::ColumnRef::analyze ( const Catalog_Namespace::Catalog catalog,
Analyzer::Query query,
TlistRefType  allow_tlist_ref = TLIST_NONE 
) const
overridevirtual

Implements Parser::Expr.

Definition at line 753 of file ParserNode.cpp.

References Analyzer::Var::deep_copy(), Analyzer::RangeTableEntry::get_column_desc(), Analyzer::Query::get_rangetable(), Analyzer::Query::get_rte(), Analyzer::Query::get_rte_idx(), Analyzer::RangeTableEntry::get_table_id(), Analyzer::Query::get_targetlist(), Analyzer::Var::get_which_row(), i, Analyzer::Var::kGROUPBY, and Analyzer::Var::kOUTPUT.

756  {
757  int table_id{0};
758  int rte_idx{0};
759  const ColumnDescriptor* cd{nullptr};
760  if (column_ == nullptr) {
761  throw std::runtime_error("invalid column name *.");
762  }
763  if (table_ != nullptr) {
764  rte_idx = query.get_rte_idx(*table_);
765  if (rte_idx < 0) {
766  throw std::runtime_error("range variable or table name " + *table_ +
767  " does not exist.");
768  }
769  Analyzer::RangeTableEntry* rte = query.get_rte(rte_idx);
770  cd = rte->get_column_desc(catalog, *column_);
771  if (cd == nullptr) {
772  throw std::runtime_error("Column name " + *column_ + " does not exist.");
773  }
774  table_id = rte->get_table_id();
775  } else {
776  bool found = false;
777  int i = 0;
778  for (auto rte : query.get_rangetable()) {
779  cd = rte->get_column_desc(catalog, *column_);
780  if (cd != nullptr && !found) {
781  found = true;
782  rte_idx = i;
783  table_id = rte->get_table_id();
784  } else if (cd != nullptr && found) {
785  throw std::runtime_error("Column name " + *column_ + " is ambiguous.");
786  }
787  i++;
788  }
789  if (cd == nullptr && allow_tlist_ref != TlistRefType::TLIST_NONE) {
790  // check if this is a reference to a targetlist entry
791  bool found = false;
792  int varno = -1;
793  int i = 1;
794  std::shared_ptr<Analyzer::TargetEntry> tle;
795  for (auto p : query.get_targetlist()) {
796  if (*column_ == p->get_resname() && !found) {
797  found = true;
798  varno = i;
799  tle = p;
800  } else if (*column_ == p->get_resname() && found) {
801  throw std::runtime_error("Output alias " + *column_ + " is ambiguous.");
802  }
803  i++;
804  }
805  if (found) {
806  if (dynamic_cast<Analyzer::Var*>(tle->get_expr())) {
807  Analyzer::Var* v = static_cast<Analyzer::Var*>(tle->get_expr());
809  return v->deep_copy();
810  }
811  }
812  if (allow_tlist_ref == TlistRefType::TLIST_COPY) {
813  return tle->get_expr()->deep_copy();
814  } else {
815  return makeExpr<Analyzer::Var>(
816  tle->get_expr()->get_type_info(), Analyzer::Var::kOUTPUT, varno);
817  }
818  }
819  }
820  if (cd == nullptr) {
821  throw std::runtime_error("Column name " + *column_ + " does not exist.");
822  }
823  }
824  return makeExpr<Analyzer::ColumnVar>(cd->columnType, table_id, cd->columnId, rte_idx);
825 }
std::unique_ptr< std::string > table_
Definition: ParserNode.h:639
std::shared_ptr< Analyzer::Expr > deep_copy() const override
Definition: Analyzer.cpp:81
int32_t get_table_id() const
int get_rte_idx(const std::string &range_var_name) const
Definition: Analyzer.cpp:1401
RangeTableEntry * get_rte(int rte_idx) const
Definition: Analyzer.h:1806
WhichRow get_which_row() const
Definition: Analyzer.h:272
specifies the content in-memory of a row in the column metadata table
const ColumnDescriptor * get_column_desc(const Catalog_Namespace::Catalog &catalog, const std::string &name)
std::unique_ptr< std::string > column_
Definition: ParserNode.h:640
const std::vector< std::shared_ptr< TargetEntry > > & get_targetlist() const
Definition: Analyzer.h:1776
const std::vector< RangeTableEntry * > & get_rangetable() const
Definition: Analyzer.h:1782

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const std::string* Parser::ColumnRef::get_column ( ) const
inline

Definition at line 631 of file ParserNode.h.

References column_.

631 { return column_.get(); }
std::unique_ptr< std::string > column_
Definition: ParserNode.h:640
const std::string* Parser::ColumnRef::get_table ( ) const
inline

Definition at line 630 of file ParserNode.h.

References table_.

630 { return table_.get(); }
std::unique_ptr< std::string > table_
Definition: ParserNode.h:639
std::string Parser::ColumnRef::to_string ( ) const
overridevirtual

Implements Parser::Expr.

Definition at line 1422 of file ParserNode.cpp.

1422  {
1423  std::string str;
1424  if (table_ == nullptr) {
1425  str = *column_;
1426  } else if (column_ == nullptr) {
1427  str = *table_ + ".*";
1428  } else {
1429  str = *table_ + "." + *column_;
1430  }
1431  return str;
1432 }
std::unique_ptr< std::string > table_
Definition: ParserNode.h:639
std::unique_ptr< std::string > column_
Definition: ParserNode.h:640

Member Data Documentation

std::unique_ptr<std::string> Parser::ColumnRef::column_
private

Definition at line 640 of file ParserNode.h.

Referenced by get_column().

std::unique_ptr<std::string> Parser::ColumnRef::table_
private

Definition at line 639 of file ParserNode.h.

Referenced by get_table().


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