#include <julea-config.h>
#include <glib.h>
#include <string.h>
#include <bson.h>
#include <julea.h>
#include <db/jdb-internal.h>
#include <julea-db.h>

Functions
JDBSelector *	j_db_selector_new (JDBSchema schema, JDBSelectorMode mode, GError *error)

JDBSelector *	j_db_selector_ref (JDBSelector *selector)

void	j_db_selector_unref (JDBSelector *selector)

gboolean	j_db_selector_add_field (JDBSelector selector, gchar const name, JDBSelectorOperator operator_, gconstpointer value, guint64 length, GError **error)

gboolean	j_db_selector_add_selector (JDBSelector selector, JDBSelector sub_selector, GError **error)
	Add a second selector as sub selector.

gboolean	j_db_selector_add_join (JDBSelector selector, gchar const selector_field, JDBSelector sub_selector, gchar const sub_selector_field, GError **error)

Function Documentation

◆ j_db_selector_add_field()

gboolean j_db_selector_add_field	(	JDBSelector *	selector,
		gchar const *	name,
		JDBSelectorOperator	operator_,
		gconstpointer	value,
		guint64	length,
		GError **	error
	)

add a search field to the selector.

Parameters

[in]	selector	to add a search field to
[in]	name	the name of the field to compare
[in]	operator_	the operator to use to compare the stored value with the given value
[in]	value	the value to compare with
[in]	length	the length of the value. Only used if value is binary
[out]	error	A GError pointer. Will point to a GError object in case of failure.

Precondition: selector != NULL; name != NULL; name must exist in the schema; operator must be applyable to the defined type of the variable; selector including all previously added sub_selectors must not contain more than 500 search fields after applying this operation

Postcondition: the value may be freed or modified by the caller immediately after calling this function

Returns: TRUE on success, FALSE otherwise

◆ j_db_selector_add_join()

gboolean j_db_selector_add_join	(	JDBSelector *	selector,
		gchar const *	selector_field,
		JDBSelector *	sub_selector,
		gchar const *	sub_selector_field,
		GError **	error
	)

Add a JOIN to the primary selector using the schema from the sub selector.

This function will join both schemas using the given fields and also copy previous add_join and add_selector data from the secondary selector to the primary selector. The given selectors must represent different primary schemas in the same namepsace.

Parameters

[in]	selector	Primary selector.
[in]	selector_field	Name of a field in the primary schema of the selector.
[in]	sub_selector	The second selector to be used in the join.
[in]	sub_selector_field	Name of a field in the primary schema of the sub_selector.

Precondition: selector != NULL; sub_selector != NULL; selector != sub_selector; selector including all previously added sub_selectors must not contain more than 500 search fields after applying this operation

Returns: TRUE on success, FALSE otherwise

◆ j_db_selector_add_selector()

gboolean j_db_selector_add_selector	(	JDBSelector *	selector,
		JDBSelector *	sub_selector,
		GError **	error
	)

Add a second selector as sub selector.

Using this function it is possible to build nested expressions (e.g. "A and B and (C or D)" where "C or D" is given by a sub selector). The namespace and schema of both selectors must be the same.

Parameters

[in]	selector	primary selector
[in]	sub_selector	sub selector
[out]	error	A GError pointer. Will point to a GError object in case of failure.

Precondition: selector != NULL; sub_selector != NULL; selector != sub_selector; selector including all previously added sub_selectors must not contain more than 500 search fields after applying this operation

Returns: TRUE on success, FALSE otherwise

◆ j_db_selector_new()

JDBSelector * j_db_selector_new	(	JDBSchema *	schema,
		JDBSelectorMode	mode,
		GError **	error
	)

Allocates a new selector.

Parameters

[in]	schema	The schema defines the structure of the selector
[in]	mode	the more of the selector
[out]	error	A GError pointer. Will point to a GError object in case of failure.

Precondition: schema != NULL; schema is initialized

Returns: the new selector or NULL on failure

◆ j_db_selector_ref()

JDBSelector * j_db_selector_ref ( JDBSelector * selector )

Increase the ref_count of the given selector.

Parameters

[in] selector the selector to increase the ref_count

Precondition: selector != NULL

Returns: the selector or NULL on failure

◆ j_db_selector_unref()

void j_db_selector_unref ( JDBSelector * selector )

Decrease the ref_count of the given selector - and automatically call free if ref_count is 0. This is a noop if selector == NULL.

Parameters

[in] selector the selector to decrease the ref_count

Functions

Function Documentation

◆ j_db_selector_add_field()

◆ j_db_selector_add_join()

◆ j_db_selector_add_selector()

◆ j_db_selector_new()

◆ j_db_selector_ref()

◆ j_db_selector_unref()