qdb_operation_t Struct Reference

A single operation containing all parameters to execute the operation in a batch or in a transaction. More...

#include <batch.h>

Data Fields
qdb_operation_type_t	type
	The type of the operation.
const char *	alias
qdb_error_t	error
union {
struct {
const char *   tag
}   has_tag
	Tag specific operation parameters.
struct {
qdb_int_t   result
qdb_int_t   addend
	The value to add or subtract to the entry.
}   int_add
	Integer increment/decrement specific operation parameters.
struct {
qdb_int_t   result
	The result of the integer get operation.
}   int_get
	Integer get specific operation parameters.
int_put_update_t   int_put
	Integer put specific operation parameters.
int_put_update_t   int_update
	Integer update specific operation parameters.
struct {
double   result
double   addend
	The value to add or subtract to the entry.
}   double_add
	Double increment/decrement specific operation parameters.
struct {
double   result
	The result of the double get operation.
}   double_get
	Double get specific operation parameters.
double_put_update_t   double_put
	Double put specific operation parameters.
double_put_update_t   double_update
	Double update specific operation parameters.
blob_put_update_t   blob_put
	Blob put specific operation parameters.
blob_put_update_t   blob_update
	Blob update specific operation parameters.
struct {
const void *   original_content
qdb_size_t   original_content_size
	The size of the result buffer.
const void *   new_content
	A pointer to the buffer with the data to be written.
qdb_size_t   new_content_size
	The size of the buffer pointed by content.
const void *   comparand
	A pointer to the comparand.
qdb_size_t   comparand_size
	The size of the buffer pointed by comparand.
qdb_size_t   comparand_offset
qdb_time_t   expiry_time
}   blob_cas
	Blob compare and swap specific operation parameters.
struct {
const char *   original_content
qdb_size_t   original_content_size
	The size of the result buffer.
const char *   new_content
	A pointer to the buffer with the data to be written.
qdb_size_t   new_content_size
	The size of the buffer pointed by content.
const char *   comparand
	A pointer to the comparand.
qdb_size_t   comparand_size
	The size of the buffer pointed by comparand.
qdb_size_t   comparand_offset
qdb_time_t   expiry_time
}   string_cas
	String compare and swap specific operation parameters.
struct {
const void *   content
qdb_size_t   content_size
	The size of the result buffer.
qdb_size_t   content_offset
}   blob_get
	Blob get specific operation parameters.
struct {
const void *   original_content
qdb_size_t   original_content_size
	The size of the result buffer.
const void *   new_content
	A pointer to the buffer with the data to be written.
qdb_size_t   new_content_size
	The size of the buffer pointed by content.
qdb_time_t   expiry_time
}   blob_get_and_update
	Blob get and update specific operation parameters.
struct {
const char *   original_content
qdb_size_t   original_content_size
	The size of the result buffer.
const char *   new_content
	A pointer to the buffer with the data to be written.
qdb_size_t   new_content_size
	The size of the buffer pointed by content.
qdb_time_t   expiry_time
}   string_get_and_update
	String get and update specific operation parameters.
struct {
const char *   content
qdb_size_t   content_size
	The size of the result buffer.
qdb_size_t   content_offset
}   string_get
	String get specific operation parameters.
struct {
qdb_timespec_t   result
	The result of the double get operation.
}   timestamp_get
	Timestamp get specific operation parameters.
timestamp_put_update_t   timestamp_put
	Timestamp put specific operation parameters.
timestamp_put_update_t   timestamp_update
	Timestamp update specific operation parameters.
struct {
qdb_timespec_t   result
	A timestamp representing the result of the operation.
qdb_timespec_t   addend
	The value to add or subtract to the entry.
}   timestamp_add
	Timestamp increment/decrement specific operation parameters.
struct {
qdb_entry_type_t   type
	The type of the entry returned by the get value operation.
const void *   blob_content
qdb_size_t   blob_content_size
	The size of the result buffer.
qdb_int_t   int_result
double   double_result
qdb_timespec_t   timestamp_result
}   value_get
	Value get specific operation parameters.
struct {
qdb_uint_t   bytes_trimmed
}   trim_entry
	Trim entry specific operation parameters.
};
	Operation specific parameters.

Detailed Description

A single operation containing all parameters to execute the operation in a batch or in a transaction.

You should initialize operations before usage with the qdb_init_operations function.

Field Documentation

const char* qdb_operation_t::alias

A pointer to a null-terminated UTF-8 string representing the alias of the entry.

const void* qdb_operation_t::blob_content

A pointer to the buffer containing the result of the get operation when the returned type is blob This buffer is API-allocated and will be freed by a call to qdb_release

qdb_uint_t qdb_operation_t::bytes_trimmed

The result of the trimming operation - number of bytes trimmed

qdb_size_t qdb_operation_t::comparand_offset

Optional offset for the comparand. Leave to 0 if not needed.

const void* qdb_operation_t::content

A pointer to the buffer containing the result of the blob operation This buffer is API-allocated and will be freed by a call to qdb_release

const char* qdb_operation_t::content

A pointer to the buffer containing the result of the string operation This buffer is API-allocated and will be freed by a call to qdb_release

qdb_size_t qdb_operation_t::content_offset

Optional offset from which the content should be returned. Leave to 0 if not needed.

double qdb_operation_t::double_result

The result of the get operation when the returned type is double

qdb_error_t qdb_operation_t::error

A qdb_error_t code indicating success or failure after the operation has been executed

qdb_time_t qdb_operation_t::expiry_time

The optional expiration time. Use qdb_never_expires for no expiration.

qdb_int_t qdb_operation_t::int_result

The result of the get operation when the returned type is integer

const void* qdb_operation_t::original_content

A pointer to the buffer containing the result of the blob operation, if any. This buffer is API-allocated and will be freed by a call to qdb_release

A pointer to the buffer containing the result of the blob operation This buffer is API-allocated and will be freed by a call to qdb_release

const char* qdb_operation_t::original_content

A pointer to the buffer containing the result of the blob operation, if any. This buffer is API-allocated and will be freed by a call to qdb_release

A pointer to the buffer containing the result of the blob operation This buffer is API-allocated and will be freed by a call to qdb_release

qdb_int_t qdb_operation_t::result

The result of the integer get operation.

A signed 64-bit integer representing the result of the operation

double qdb_operation_t::result

The result of the double get operation.

A 64-bit floating-point representing the result of the operation

qdb_timespec_t qdb_operation_t::result

The result of the double get operation.

A timestamp representing the result of the operation.

const char* qdb_operation_t::tag

A pointer to a null-terminated UTF-8 string representing the tag to test for existence

qdb_timespec_t qdb_operation_t::timestamp_result

The result of the get operation when the returned type is timestap

qdb_entry_type_t qdb_operation_t::type

The result of the get entry type operation.

The type of the entry returned by the get value operation.

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The documentation for this struct was generated from the following file:

• qdb/batch.h