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Reference/es_mba_addmembership
Syntax
int es_mba_addmembership( struct es_mba *agg, const char *fieldname, struct es_mbm *mf );
Arguments
struct es_mba *agg |
Database aggregator. |
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const char *fieldname |
Database field name. |
struct es_mbm *mf |
Membership filter. |
Return Codes
ES_ERROR_NONE |
Success. No errors. |
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ES_ERROR_UNKNOWNFIELD |
Database field does not exist in definition used to construct aggregator. |
Description
Assign a membership filter to a database field to be used in the query plan devised by es_mba_prepare().
The database field fieldname must be available in the single iteration path identified in the query plan, since membership filters can only be used in conjunction with es_mbi_beginfetch() and es_mbi_incfetch().