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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 628 of file ParserNode.h.

Constructor & Destructor Documentation

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

Definition at line 630 of file ParserNode.h.

630 : table_(nullptr), column_(n1) {}
std::unique_ptr< std::string > table_
Definition: ParserNode.h:641
std::unique_ptr< std::string > column_
Definition: ParserNode.h:642
Parser::ColumnRef::ColumnRef ( std::string *  n1,
std::string *  n2 
)
inline

Definition at line 631 of file ParserNode.h.

631 : table_(n1), column_(n2) {}
std::unique_ptr< std::string > table_
Definition: ParserNode.h:641
std::unique_ptr< std::string > column_
Definition: ParserNode.h:642

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 887 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(), Catalog_Namespace::Catalog::getDatabaseId(), Analyzer::Var::kGROUPBY, and Analyzer::Var::kOUTPUT.

890  {
891  int table_id{0};
892  int rte_idx{0};
893  const ColumnDescriptor* cd{nullptr};
894  if (column_ == nullptr) {
895  throw std::runtime_error("invalid column name *.");
896  }
897  if (table_ != nullptr) {
898  rte_idx = query.get_rte_idx(*table_);
899  if (rte_idx < 0) {
900  throw std::runtime_error("range variable or table name " + *table_ +
901  " does not exist.");
902  }
903  Analyzer::RangeTableEntry* rte = query.get_rte(rte_idx);
904  cd = rte->get_column_desc(catalog, *column_);
905  if (cd == nullptr) {
906  throw std::runtime_error("Column name " + *column_ + " does not exist.");
907  }
908  table_id = rte->get_table_id();
909  } else {
910  bool found = false;
911  int i = 0;
912  for (auto rte : query.get_rangetable()) {
913  cd = rte->get_column_desc(catalog, *column_);
914  if (cd != nullptr && !found) {
915  found = true;
916  rte_idx = i;
917  table_id = rte->get_table_id();
918  } else if (cd != nullptr && found) {
919  throw std::runtime_error("Column name " + *column_ + " is ambiguous.");
920  }
921  i++;
922  }
923  if (cd == nullptr && allow_tlist_ref != TlistRefType::TLIST_NONE) {
924  // check if this is a reference to a targetlist entry
925  bool found = false;
926  int varno = -1;
927  int i = 1;
928  std::shared_ptr<Analyzer::TargetEntry> tle;
929  for (auto p : query.get_targetlist()) {
930  if (*column_ == p->get_resname() && !found) {
931  found = true;
932  varno = i;
933  tle = p;
934  } else if (*column_ == p->get_resname() && found) {
935  throw std::runtime_error("Output alias " + *column_ + " is ambiguous.");
936  }
937  i++;
938  }
939  if (found) {
940  if (dynamic_cast<Analyzer::Var*>(tle->get_expr())) {
941  Analyzer::Var* v = static_cast<Analyzer::Var*>(tle->get_expr());
943  return v->deep_copy();
944  }
945  }
946  if (allow_tlist_ref == TlistRefType::TLIST_COPY) {
947  return tle->get_expr()->deep_copy();
948  } else {
949  return makeExpr<Analyzer::Var>(
950  tle->get_expr()->get_type_info(), Analyzer::Var::kOUTPUT, varno);
951  }
952  }
953  }
954  if (cd == nullptr) {
955  throw std::runtime_error("Column name " + *column_ + " does not exist.");
956  }
957  }
958  return makeExpr<Analyzer::ColumnVar>(
959  cd->columnType,
960  shared::ColumnKey{catalog.getDatabaseId(), table_id, cd->columnId},
961  rte_idx);
962 }
std::unique_ptr< std::string > table_
Definition: ParserNode.h:641
std::shared_ptr< Analyzer::Expr > deep_copy() const override
Definition: Analyzer.cpp:87
int32_t get_table_id() const
int get_rte_idx(const std::string &range_var_name) const
Definition: Analyzer.cpp:1495
RangeTableEntry * get_rte(int rte_idx) const
Definition: Analyzer.h:3056
WhichRow get_which_row() const
Definition: Analyzer.h:286
int getDatabaseId() const
Definition: Catalog.h:326
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:642
const std::vector< std::shared_ptr< TargetEntry > > & get_targetlist() const
Definition: Analyzer.h:3020
const std::vector< RangeTableEntry * > & get_rangetable() const
Definition: Analyzer.h:3032

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

Definition at line 633 of file ParserNode.h.

References column_.

633 { return column_.get(); }
std::unique_ptr< std::string > column_
Definition: ParserNode.h:642
const std::string* Parser::ColumnRef::get_table ( ) const
inline

Definition at line 632 of file ParserNode.h.

References table_.

632 { return table_.get(); }
std::unique_ptr< std::string > table_
Definition: ParserNode.h:641
std::string Parser::ColumnRef::to_string ( ) const
overridevirtual

Implements Parser::Expr.

Definition at line 2133 of file ParserNode.cpp.

2133  {
2134  std::string str;
2135  if (table_ == nullptr) {
2136  str = *column_;
2137  } else if (column_ == nullptr) {
2138  str = *table_ + ".*";
2139  } else {
2140  str = *table_ + "." + *column_;
2141  }
2142  return str;
2143 }
std::unique_ptr< std::string > table_
Definition: ParserNode.h:641
std::unique_ptr< std::string > column_
Definition: ParserNode.h:642

Member Data Documentation

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

Definition at line 642 of file ParserNode.h.

Referenced by get_column().

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

Definition at line 641 of file ParserNode.h.

Referenced by get_table().


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