The class ibis::query::result allows user to retrieve query result one row at a time.
More...
#include <bundle.h>
|
|
uint32_t | colPosition (const char *cname) const |
| |
| double | getDouble (const char *cname) const |
| | Retrieve the value of the named column as a double-precision floating-point number. More...
|
| |
| double | getDouble (uint32_t selind) const |
| | Retrieve the value of column selind in the select clause as a double-precision floating-point number. More...
|
| |
| float | getFloat (const char *cname) const |
| | Retrieve the value of the named column as a single-precision floating-point number. More...
|
| |
| float | getFloat (uint32_t selind) const |
| | Retrieve the value of column selind in the select clause as a single-precision floating-point number. More...
|
| |
| int32_t | getInt (const char *cname) const |
| | Retrieve the value of the named column as a signed integer. More...
|
| |
| int32_t | getInt (uint32_t selind) const |
| | Retrieve the value of column selind in the select clause as a signed integer. More...
|
| |
|
int64_t | getLong (const char *cname) const |
| | Retrieve the value as a 64-bit integer.
|
| |
|
int64_t | getLong (uint32_t selind) const |
| | Retrieve the value as a 64-bit integer.
|
| |
|
std::string | getString (const char *cname) const |
| |
| std::string | getString (uint32_t selind) const |
| | Retrieve the string value. More...
|
| |
|
uint32_t | getUInt (const char *cname) const |
| | Retrieve the value of the named column as an unsigned integer.
|
| |
| uint32_t | getUInt (uint32_t selind) const |
| | Retrieve the value of column selind in the select clause as an unsigned integer. More...
|
| |
|
uint64_t | getULong (const char *cname) const |
| | Retrieve the value as a 64-bit unsigned integer.
|
| |
| uint64_t | getULong (uint32_t selind) const |
| | Retrieve the value of column selind in the select clause as a 64-bit unsigned integer. More...
|
| |
|
bool | next () |
| | Move to the next row/record of results.
|
| |
|
bool | nextBundle () |
| | Jump to the next bundle of results.
|
| |
|
void | printColumnNames (std::ostream &out) const |
| |
| void | reset () |
| | Move the internal pointer back to the beginning. More...
|
| |
|
| result (ibis::query &q) |
| |
|
uint32_t | width () const |
| |
The class ibis::query::result allows user to retrieve query result one row at a time.
It matches the semantics of an ODBC cursor; that is the function next has to be called before the first set of results can be used.
- Note
- This implementation makes use of ibis::bundle for internal storage, which means the results returned are sorted, see documentation about ibis::bundle for more detail.
-
This implementation stores the results in memory. Therefore, it is not suitable for handling large result sets.
| double ibis::query::result::getDouble |
( |
const char * |
cname | ) |
const |
Retrieve the value of the named column as a double-precision floating-point number.
| double ibis::query::result::getDouble |
( |
uint32_t |
selind | ) |
const |
|
inline |
Retrieve the value of column selind in the select clause as a double-precision floating-point number.
| float ibis::query::result::getFloat |
( |
const char * |
cname | ) |
const |
Retrieve the value of the named column as a single-precision floating-point number.
| float ibis::query::result::getFloat |
( |
uint32_t |
selind | ) |
const |
|
inline |
Retrieve the value of column selind in the select clause as a single-precision floating-point number.
| int32_t ibis::query::result::getInt |
( |
const char * |
cname | ) |
const |
Retrieve the value of the named column as a signed integer.
- Note
- The name must appeared in the select clause of the query used to construct the
result object.
| int32_t ibis::query::result::getInt |
( |
uint32_t |
selind | ) |
const |
|
inline |
Retrieve the value of column selind in the select clause as a signed integer.
- Note
- Since this version avoids the name look up, it should be more efficient than the version taking the column name as argument.
| std::string ibis::query::result::getString |
( |
uint32_t |
selind | ) |
const |
|
inline |
| uint32_t ibis::query::result::getUInt |
( |
uint32_t |
selind | ) |
const |
|
inline |
Retrieve the value of column selind in the select clause as an unsigned integer.
| uint64_t ibis::query::result::getULong |
( |
uint32_t |
selind | ) |
const |
|
inline |
Retrieve the value of column selind in the select clause as a 64-bit unsigned integer.
| void ibis::query::result::reset |
( |
| ) |
|
Move the internal pointer back to the beginning.
Must call next to use the first set of results.
The documentation for this class was generated from the following files:
