ibis::join::result Class Reference
An abstract base class for results of a join operation. More...
#include <join.h>
Public Member Functions | |
| virtual std::vector< std::string > | columnNames () const =0 |
| Return column names. | |
| virtual ibis::table::typeList | columnTypes () const =0 |
| Return data types of all columns. | |
| virtual void | describe (std::ostream &out) const =0 |
| Print the column names and type. | |
| virtual int | dump (std::ostream &out, const char *del=", ") const =0 |
| Print out the values of the current row. | |
| virtual int | fetch ()=0 |
| Make the next row of the data set available for retrieval. | |
| virtual uint32_t | nColumns () const =0 |
| virtual uint64_t | nRows () const =0 |
| virtual int | getColumnAsByte (uint32_t cnum, char &) const =0 |
| virtual int | getColumnAsByte (const char *cname, char &) const =0 |
| virtual int | getColumnAsDouble (uint32_t cnum, double &) const =0 |
| virtual int | getColumnAsDouble (const char *cname, double &) const =0 |
| virtual int | getColumnAsFloat (uint32_t cnum, float &) const =0 |
| virtual int | getColumnAsFloat (const char *cname, float &) const =0 |
| virtual int | getColumnAsInt (uint32_t cnum, int32_t &) const =0 |
| virtual int | getColumnAsInt (const char *cname, int32_t &) const =0 |
| virtual int | getColumnAsLong (uint32_t cnum, int64_t &) const =0 |
| virtual int | getColumnAsLong (const char *cname, int64_t &) const =0 |
| virtual int | getColumnAsShort (uint32_t cnum, int16_t &) const =0 |
| virtual int | getColumnAsShort (const char *cname, int16_t &) const =0 |
| virtual int | getColumnAsString (uint32_t cnum, std::string &) const =0 |
| virtual int | getColumnAsString (const char *cname, std::string &) const =0 |
| virtual int | getColumnAsUByte (uint32_t cnum, unsigned char &) const =0 |
| virtual int | getColumnAsUByte (const char *cname, unsigned char &) const =0 |
| virtual int | getColumnAsUInt (uint32_t cnum, uint32_t &) const =0 |
| virtual int | getColumnAsUInt (const char *cname, uint32_t &) const =0 |
| virtual int | getColumnAsULong (uint32_t cnum, uint64_t &) const =0 |
| virtual int | getColumnAsULong (const char *cname, uint64_t &) const =0 |
| virtual int | getColumnAsUShort (uint32_t cnum, uint16_t &) const =0 |
| virtual int | getColumnAsUShort (const char *cname, uint16_t &) const =0 |
Detailed Description
An abstract base class for results of a join operation.
It primarily provides functions to iterate through the results.
Member Function Documentation
| virtual int ibis::join::result::fetch | ( | ) | [pure virtual] |
Make the next row of the data set available for retrieval.
Returns 0 if successful, returns a negative number to indicate error.
Implemented in ibis::joinIN::result.
| virtual int ibis::join::result::getColumnAsByte | ( | uint32_t | cnum, | |
| char & | ||||
| ) | const [pure virtual] |
This version of getColumnAsTTT directly use the column number, i.e., the position of a column in the list returned by function columnNames or columnTypes. This version of the data access function may be able to avoid the name lookup and reduce the execution time.
Implemented in ibis::joinIN::result.
| virtual int ibis::join::result::getColumnAsByte | ( | const char * | cname, | |
| char & | ||||
| ) | const [pure virtual] |
Retrieve the value of the named column.
- Note:
- Note the cost of name lookup is likely to dominate the total cost of such a function.
Implemented in ibis::joinIN::result.
| virtual int ibis::join::result::getColumnAsDouble | ( | uint32_t | cnum, | |
| double & | ||||
| ) | const [pure virtual] |
This version of getColumnAsTTT directly use the column number, i.e., the position of a column in the list returned by function columnNames or columnTypes. This version of the data access function may be able to avoid the name lookup and reduce the execution time.
Implemented in ibis::joinIN::result.
| virtual int ibis::join::result::getColumnAsDouble | ( | const char * | cname, | |
| double & | ||||
| ) | const [pure virtual] |
This version of getColumnAsTTT directly use the column number, i.e., the position of a column in the list returned by function columnNames or columnTypes. This version of the data access function may be able to avoid the name lookup and reduce the execution time.
Implemented in ibis::joinIN::result.
| virtual int ibis::join::result::getColumnAsFloat | ( | uint32_t | cnum, | |
| float & | ||||
| ) | const [pure virtual] |
This version of getColumnAsTTT directly use the column number, i.e., the position of a column in the list returned by function columnNames or columnTypes. This version of the data access function may be able to avoid the name lookup and reduce the execution time.
Implemented in ibis::joinIN::result.
| virtual int ibis::join::result::getColumnAsFloat | ( | const char * | cname, | |
| float & | ||||
| ) | const [pure virtual] |
This version of getColumnAsTTT directly use the column number, i.e., the position of a column in the list returned by function columnNames or columnTypes. This version of the data access function may be able to avoid the name lookup and reduce the execution time.
Implemented in ibis::joinIN::result.
| virtual int ibis::join::result::getColumnAsInt | ( | uint32_t | cnum, | |
| int32_t & | ||||
| ) | const [pure virtual] |
This version of getColumnAsTTT directly use the column number, i.e., the position of a column in the list returned by function columnNames or columnTypes. This version of the data access function may be able to avoid the name lookup and reduce the execution time.
Implemented in ibis::joinIN::result.
| virtual int ibis::join::result::getColumnAsInt | ( | const char * | cname, | |
| int32_t & | ||||
| ) | const [pure virtual] |
This version of getColumnAsTTT directly use the column number, i.e., the position of a column in the list returned by function columnNames or columnTypes. This version of the data access function may be able to avoid the name lookup and reduce the execution time.
Implemented in ibis::joinIN::result.
| virtual int ibis::join::result::getColumnAsLong | ( | uint32_t | cnum, | |
| int64_t & | ||||
| ) | const [pure virtual] |
This version of getColumnAsTTT directly use the column number, i.e., the position of a column in the list returned by function columnNames or columnTypes. This version of the data access function may be able to avoid the name lookup and reduce the execution time.
Implemented in ibis::joinIN::result.
| virtual int ibis::join::result::getColumnAsLong | ( | const char * | cname, | |
| int64_t & | ||||
| ) | const [pure virtual] |
This version of getColumnAsTTT directly use the column number, i.e., the position of a column in the list returned by function columnNames or columnTypes. This version of the data access function may be able to avoid the name lookup and reduce the execution time.
Implemented in ibis::joinIN::result.
| virtual int ibis::join::result::getColumnAsShort | ( | uint32_t | cnum, | |
| int16_t & | ||||
| ) | const [pure virtual] |
This version of getColumnAsTTT directly use the column number, i.e., the position of a column in the list returned by function columnNames or columnTypes. This version of the data access function may be able to avoid the name lookup and reduce the execution time.
Implemented in ibis::joinIN::result.
| virtual int ibis::join::result::getColumnAsShort | ( | const char * | cname, | |
| int16_t & | ||||
| ) | const [pure virtual] |
This version of getColumnAsTTT directly use the column number, i.e., the position of a column in the list returned by function columnNames or columnTypes. This version of the data access function may be able to avoid the name lookup and reduce the execution time.
Implemented in ibis::joinIN::result.
| virtual int ibis::join::result::getColumnAsString | ( | uint32_t | cnum, | |
| std::string & | ||||
| ) | const [pure virtual] |
This version of getColumnAsTTT directly use the column number, i.e., the position of a column in the list returned by function columnNames or columnTypes. This version of the data access function may be able to avoid the name lookup and reduce the execution time.
Implemented in ibis::joinIN::result.
| virtual int ibis::join::result::getColumnAsString | ( | const char * | cname, | |
| std::string & | ||||
| ) | const [pure virtual] |
This version of getColumnAsTTT directly use the column number, i.e., the position of a column in the list returned by function columnNames or columnTypes. This version of the data access function may be able to avoid the name lookup and reduce the execution time.
Implemented in ibis::joinIN::result.
| virtual int ibis::join::result::getColumnAsUByte | ( | uint32_t | cnum, | |
| unsigned char & | ||||
| ) | const [pure virtual] |
This version of getColumnAsTTT directly use the column number, i.e., the position of a column in the list returned by function columnNames or columnTypes. This version of the data access function may be able to avoid the name lookup and reduce the execution time.
Implemented in ibis::joinIN::result.
| virtual int ibis::join::result::getColumnAsUByte | ( | const char * | cname, | |
| unsigned char & | ||||
| ) | const [pure virtual] |
This version of getColumnAsTTT directly use the column number, i.e., the position of a column in the list returned by function columnNames or columnTypes. This version of the data access function may be able to avoid the name lookup and reduce the execution time.
Implemented in ibis::joinIN::result.
| virtual int ibis::join::result::getColumnAsUInt | ( | uint32_t | cnum, | |
| uint32_t & | ||||
| ) | const [pure virtual] |
This version of getColumnAsTTT directly use the column number, i.e., the position of a column in the list returned by function columnNames or columnTypes. This version of the data access function may be able to avoid the name lookup and reduce the execution time.
Implemented in ibis::joinIN::result.
| virtual int ibis::join::result::getColumnAsUInt | ( | const char * | cname, | |
| uint32_t & | ||||
| ) | const [pure virtual] |
This version of getColumnAsTTT directly use the column number, i.e., the position of a column in the list returned by function columnNames or columnTypes. This version of the data access function may be able to avoid the name lookup and reduce the execution time.
Implemented in ibis::joinIN::result.
| virtual int ibis::join::result::getColumnAsULong | ( | uint32_t | cnum, | |
| uint64_t & | ||||
| ) | const [pure virtual] |
This version of getColumnAsTTT directly use the column number, i.e., the position of a column in the list returned by function columnNames or columnTypes. This version of the data access function may be able to avoid the name lookup and reduce the execution time.
Implemented in ibis::joinIN::result.
| virtual int ibis::join::result::getColumnAsULong | ( | const char * | cname, | |
| uint64_t & | ||||
| ) | const [pure virtual] |
This version of getColumnAsTTT directly use the column number, i.e., the position of a column in the list returned by function columnNames or columnTypes. This version of the data access function may be able to avoid the name lookup and reduce the execution time.
Implemented in ibis::joinIN::result.
| virtual int ibis::join::result::getColumnAsUShort | ( | uint32_t | cnum, | |
| uint16_t & | ||||
| ) | const [pure virtual] |
This version of getColumnAsTTT directly use the column number, i.e., the position of a column in the list returned by function columnNames or columnTypes. This version of the data access function may be able to avoid the name lookup and reduce the execution time.
Implemented in ibis::joinIN::result.
| virtual int ibis::join::result::getColumnAsUShort | ( | const char * | cname, | |
| uint16_t & | ||||
| ) | const [pure virtual] |
This version of getColumnAsTTT directly use the column number, i.e., the position of a column in the list returned by function columnNames or columnTypes. This version of the data access function may be able to avoid the name lookup and reduce the execution time.
Implemented in ibis::joinIN::result.
The documentation for this class was generated from the following file:
