OmniSciDB  4201147b46
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Macros Groups Pages
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 627 of file ParserNode.h.

Constructor & Destructor Documentation

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

Definition at line 629 of file ParserNode.h.

629 : table_(nullptr), column_(n1) {}
std::unique_ptr< std::string > table_
Definition: ParserNode.h:640
std::unique_ptr< std::string > column_
Definition: ParserNode.h:641
Parser::ColumnRef::ColumnRef ( std::string *  n1,
std::string *  n2 
)
inline

Definition at line 630 of file ParserNode.h.

630 : table_(n1), column_(n2) {}
std::unique_ptr< std::string > table_
Definition: ParserNode.h:640
std::unique_ptr< std::string > column_
Definition: ParserNode.h:641

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 878 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(), Analyzer::Var::kGROUPBY, and Analyzer::Var::kOUTPUT.

881  {
882  int table_id{0};
883  int rte_idx{0};
884  const ColumnDescriptor* cd{nullptr};
885  if (column_ == nullptr) {
886  throw std::runtime_error("invalid column name *.");
887  }
888  if (table_ != nullptr) {
889  rte_idx = query.get_rte_idx(*table_);
890  if (rte_idx < 0) {
891  throw std::runtime_error("range variable or table name " + *table_ +
892  " does not exist.");
893  }
894  Analyzer::RangeTableEntry* rte = query.get_rte(rte_idx);
895  cd = rte->get_column_desc(catalog, *column_);
896  if (cd == nullptr) {
897  throw std::runtime_error("Column name " + *column_ + " does not exist.");
898  }
899  table_id = rte->get_table_id();
900  } else {
901  bool found = false;
902  int i = 0;
903  for (auto rte : query.get_rangetable()) {
904  cd = rte->get_column_desc(catalog, *column_);
905  if (cd != nullptr && !found) {
906  found = true;
907  rte_idx = i;
908  table_id = rte->get_table_id();
909  } else if (cd != nullptr && found) {
910  throw std::runtime_error("Column name " + *column_ + " is ambiguous.");
911  }
912  i++;
913  }
914  if (cd == nullptr && allow_tlist_ref != TlistRefType::TLIST_NONE) {
915  // check if this is a reference to a targetlist entry
916  bool found = false;
917  int varno = -1;
918  int i = 1;
919  std::shared_ptr<Analyzer::TargetEntry> tle;
920  for (auto p : query.get_targetlist()) {
921  if (*column_ == p->get_resname() && !found) {
922  found = true;
923  varno = i;
924  tle = p;
925  } else if (*column_ == p->get_resname() && found) {
926  throw std::runtime_error("Output alias " + *column_ + " is ambiguous.");
927  }
928  i++;
929  }
930  if (found) {
931  if (dynamic_cast<Analyzer::Var*>(tle->get_expr())) {
932  Analyzer::Var* v = static_cast<Analyzer::Var*>(tle->get_expr());
934  return v->deep_copy();
935  }
936  }
937  if (allow_tlist_ref == TlistRefType::TLIST_COPY) {
938  return tle->get_expr()->deep_copy();
939  } else {
940  return makeExpr<Analyzer::Var>(
941  tle->get_expr()->get_type_info(), Analyzer::Var::kOUTPUT, varno);
942  }
943  }
944  }
945  if (cd == nullptr) {
946  throw std::runtime_error("Column name " + *column_ + " does not exist.");
947  }
948  }
949  return makeExpr<Analyzer::ColumnVar>(cd->columnType, table_id, cd->columnId, rte_idx);
950 }
std::unique_ptr< std::string > table_
Definition: ParserNode.h:640
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:1405
RangeTableEntry * get_rte(int rte_idx) const
Definition: Analyzer.h:2466
WhichRow get_which_row() const
Definition: Analyzer.h:280
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:641
const std::vector< std::shared_ptr< TargetEntry > > & get_targetlist() const
Definition: Analyzer.h:2430
const std::vector< RangeTableEntry * > & get_rangetable() const
Definition: Analyzer.h:2442

+ Here is the call graph for this function:

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

Definition at line 632 of file ParserNode.h.

References column_.

632 { return column_.get(); }
std::unique_ptr< std::string > column_
Definition: ParserNode.h:641
const std::string* Parser::ColumnRef::get_table ( ) const
inline

Definition at line 631 of file ParserNode.h.

References table_.

631 { return table_.get(); }
std::unique_ptr< std::string > table_
Definition: ParserNode.h:640
std::string Parser::ColumnRef::to_string ( ) const
overridevirtual

Implements Parser::Expr.

Definition at line 2089 of file ParserNode.cpp.

2089  {
2090  std::string str;
2091  if (table_ == nullptr) {
2092  str = *column_;
2093  } else if (column_ == nullptr) {
2094  str = *table_ + ".*";
2095  } else {
2096  str = *table_ + "." + *column_;
2097  }
2098  return str;
2099 }
std::unique_ptr< std::string > table_
Definition: ParserNode.h:640
std::unique_ptr< std::string > column_
Definition: ParserNode.h:641

Member Data Documentation

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

Definition at line 641 of file ParserNode.h.

Referenced by get_column().

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

Definition at line 640 of file ParserNode.h.

Referenced by get_table().


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