Query Class Reference

Storage layer query container. More...

#include <query.h>

Public Member Functions
	Query (Where *where)
	Construct a query with a simple where clause. More...
	Query (Aggregate *aggreate, Where *where)
	Construct a query with a where clause and aggregate response. More...
	Query (Timebucket *timebucket, Where *where)
	Construct a timebucket query with a simple where clause. More...
	Query (Timebucket *timebucket, Where *where, unsigned int limit)
	Construct a timebucket query with a simple where clause and a limit on the rows to return. More...
	Query (Returns *returns)
	Construct a simple query to return a certain column from a table. More...
	Query (std::vector< Returns *> returns)
	Construct a simple query to return certain columns from a table. More...
	Query (std::vector< Returns *> returns, Where *where)
	Construct a query with a fixed set of returned values and a simple where clause. More...
	Query (std::vector< Returns *> returns, Where *where, unsigned int limit)
	Construct a query with a fixed set of returned values and a simple where clause and return a limited set of rows. More...
	~Query ()
	Destructor for a query object.
void	aggregate (Aggregate *aggegate)
	Add a aggregate operation to an existing query object. More...
void	group (const std::string &column)
	Add a group operation to a query. More...
void	sort (Sort *sort)
	Add a sort operation to an existing query. More...
void	limit (unsigned int limit)
	Limit the numebr of rows returned by the query. More...
void	timebucket (Timebucket *)
	Add a timebucket operation to an existing query. More...
void	returns (Returns *)
	Limit the query to return just a single column. More...
void	returns (std::vector< Returns *>)
	Limit the columns returned by the query. More...
void	distinct ()
	Add a distinct value modifier to the query.
void	join (Join *join)
	Add a join clause to a query. More...
const std::string	toJSON () const
	Return the JSON payload for a where clause.

Detailed Description

Storage layer query container.

Constructor & Destructor Documentation

Query() [1/8]

Query::Query

(

Where *

where

)

Construct a query with a simple where clause.

Parameters

where

A pointer to the where condition

Query() [2/8]

Query::Query	(	Aggregate *	aggregate,
		Where *	where
	)

Construct a query with a where clause and aggregate response.

Parameters

aggregate	A ppointer to the aggregate operation to perform
where	A pointer to the where condition

Query() [3/8]

Query::Query	(	Timebucket *	timebucket,
		Where *	where
	)

Construct a timebucket query with a simple where clause.

Parameters

timebuck	A pointer to the timebucket definition
where	A pointer to the where condition

Query() [4/8]

Query::Query	(	Timebucket *	timebucket,
		Where *	where,
		unsigned int	limit
	)

Construct a timebucket query with a simple where clause and a limit on the rows to return.

Parameters

timebuck	A pointer to the timebucket definition
where	A pointer to the where condition
limit	The number of rows to return

Query() [5/8]

Query::Query

(

Returns *

returns

)

Construct a simple query to return a certain column from a table.

Parameters

returns

The rows to return

Query() [6/8]

Query::Query

(

std::vector< Returns *>

returns

)

Construct a simple query to return certain columns from a table.

Parameters

returns

The rows to return

Query() [7/8]

Query::Query	(	std::vector< Returns *>	returns,
		Where *	where
	)

Construct a query with a fixed set of returned values and a simple where clause.

returns The set of rows to return where The where clause

Query() [8/8]

Query::Query	(	std::vector< Returns *>	returns,
		Where *	where,
		unsigned int	limit
	)

Construct a query with a fixed set of returned values and a simple where clause and return a limited set of rows.

returns The set of rows to return where The where clause

Parameters

limit

The numebr of rows to return

Member Function Documentation

aggregate()

void Query::aggregate

(

Aggregate *

aggregate

)

Add a aggregate operation to an existing query object.

Parameters

aggregate

The aggregate operation to add

group()

void Query::group

(

const std::string &

column

)

Add a group operation to a query.

Parameters

column

The column to group by

join()

void Query::join

(

Join *

join

)

Add a join clause to a query.

Parameters

join	A pointer to a Join onject

limit()

void Query::limit

(

unsigned int

limit

)

Limit the numebr of rows returned by the query.

Parameters

limit

The number of rows to limit the return to

returns() [1/2]

void Query::returns

(

Returns *

returns

)

Limit the query to return just a single column.

Parameters

returns

The column to return

returns() [2/2]

void Query::returns

(

std::vector< Returns *>

returns

)

Limit the columns returned by the query.

Parameters

returns

The columns to return

sort()

void Query::sort

(

Sort *

sort

)

Add a sort operation to an existing query.

Parameters

sort	The sort operation to add

timebucket()

void Query::timebucket

(

Timebucket *

timebucket

)

Add a timebucket operation to an existing query.

Parameters

timebucket

The timebucket operation to add to the query

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

• C/common/include/query.h
• C/common/query.cpp