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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 600 of file ParserNode.h.

Constructor & Destructor Documentation

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

Definition at line 602 of file ParserNode.h.

602 : table(nullptr), column(n1) {}
std::unique_ptr< std::string > column
Definition: ParserNode.h:614
std::unique_ptr< std::string > table
Definition: ParserNode.h:613
Parser::ColumnRef::ColumnRef ( std::string *  n1,
std::string *  n2 
)
inline

Definition at line 603 of file ParserNode.h.

603 : table(n1), column(n2) {}
std::unique_ptr< std::string > column
Definition: ParserNode.h:614
std::unique_ptr< std::string > table
Definition: ParserNode.h:613

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 725 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, Analyzer::Var::kOUTPUT, and test_readcsv::table.

728  {
729  int table_id{0};
730  int rte_idx{0};
731  const ColumnDescriptor* cd{nullptr};
732  if (column == nullptr) {
733  throw std::runtime_error("invalid column name *.");
734  }
735  if (table != nullptr) {
736  rte_idx = query.get_rte_idx(*table);
737  if (rte_idx < 0) {
738  throw std::runtime_error("range variable or table name " + *table +
739  " does not exist.");
740  }
741  Analyzer::RangeTableEntry* rte = query.get_rte(rte_idx);
742  cd = rte->get_column_desc(catalog, *column);
743  if (cd == nullptr) {
744  throw std::runtime_error("Column name " + *column + " does not exist.");
745  }
746  table_id = rte->get_table_id();
747  } else {
748  bool found = false;
749  int i = 0;
750  for (auto rte : query.get_rangetable()) {
751  cd = rte->get_column_desc(catalog, *column);
752  if (cd != nullptr && !found) {
753  found = true;
754  rte_idx = i;
755  table_id = rte->get_table_id();
756  } else if (cd != nullptr && found) {
757  throw std::runtime_error("Column name " + *column + " is ambiguous.");
758  }
759  i++;
760  }
761  if (cd == nullptr && allow_tlist_ref != TlistRefType::TLIST_NONE) {
762  // check if this is a reference to a targetlist entry
763  bool found = false;
764  int varno = -1;
765  int i = 1;
766  std::shared_ptr<Analyzer::TargetEntry> tle;
767  for (auto p : query.get_targetlist()) {
768  if (*column == p->get_resname() && !found) {
769  found = true;
770  varno = i;
771  tle = p;
772  } else if (*column == p->get_resname() && found) {
773  throw std::runtime_error("Output alias " + *column + " is ambiguous.");
774  }
775  i++;
776  }
777  if (found) {
778  if (dynamic_cast<Analyzer::Var*>(tle->get_expr())) {
779  Analyzer::Var* v = static_cast<Analyzer::Var*>(tle->get_expr());
781  return v->deep_copy();
782  }
783  }
784  if (allow_tlist_ref == TlistRefType::TLIST_COPY) {
785  return tle->get_expr()->deep_copy();
786  } else {
787  return makeExpr<Analyzer::Var>(
788  tle->get_expr()->get_type_info(), Analyzer::Var::kOUTPUT, varno);
789  }
790  }
791  }
792  if (cd == nullptr) {
793  throw std::runtime_error("Column name " + *column + " does not exist.");
794  }
795  }
796  return makeExpr<Analyzer::ColumnVar>(cd->columnType, table_id, cd->columnId, rte_idx);
797 }
std::unique_ptr< std::string > column
Definition: ParserNode.h:614
std::shared_ptr< Analyzer::Expr > deep_copy() const override
Definition: Analyzer.cpp:81
std::unique_ptr< std::string > table
Definition: ParserNode.h:613
int32_t get_table_id() const
int get_rte_idx(const std::string &range_var_name) const
Definition: Analyzer.cpp:1391
RangeTableEntry * get_rte(int rte_idx) const
Definition: Analyzer.h:1646
WhichRow get_which_row() const
Definition: Analyzer.h:273
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)
const std::vector< std::shared_ptr< TargetEntry > > & get_targetlist() const
Definition: Analyzer.h:1616
const std::vector< RangeTableEntry * > & get_rangetable() const
Definition: Analyzer.h:1622

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

Definition at line 605 of file ParserNode.h.

References column.

605 { return column.get(); }
std::unique_ptr< std::string > column
Definition: ParserNode.h:614
const std::string* Parser::ColumnRef::get_table ( ) const
inline

Definition at line 604 of file ParserNode.h.

References table.

604 { return table.get(); }
std::unique_ptr< std::string > table
Definition: ParserNode.h:613
std::string Parser::ColumnRef::to_string ( ) const
overridevirtual

Implements Parser::Expr.

Definition at line 1308 of file ParserNode.cpp.

References test_readcsv::table.

1308  {
1309  std::string str;
1310  if (table == nullptr) {
1311  str = *column;
1312  } else if (column == nullptr) {
1313  str = *table + ".*";
1314  } else {
1315  str = *table + "." + *column;
1316  }
1317  return str;
1318 }
std::unique_ptr< std::string > column
Definition: ParserNode.h:614
std::unique_ptr< std::string > table
Definition: ParserNode.h:613

Member Data Documentation

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

Definition at line 614 of file ParserNode.h.

Referenced by get_column().

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

Definition at line 613 of file ParserNode.h.

Referenced by get_table().


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