Grass-valley K2 TX/MAM Database Protocol Manual v.2.2 Manual de usuario descargar pdf (Pagina 8)

TX/MAM Database Protocol Manual - document version: 2.2 – Page 8

6. Database search functions

Use the functions described in this section to search the database.

A search command consists of a number (>=1) of criteria that constitute the query that will be used to

match the records. Criteria can be used with the 'and' and 'or' logical operators. The result of a search

command is a list of IDs of records that matched the criteria.

Most criteria can only use fields that reside in the same table. SQL-criteria are an exception to this

rule.

Restrict the number of records in the result list as much as possible, especially when retrieving a

main_event from a Playlist. Too many records will result in a failure on the call. Returning a great

number of records can have a negative effect on system performance.

6.1 Clearing all criteria used in a previous search

int cob_criteria_clear( void );

Parameters

No parameters required

Result

The result of the function is an integer with the following values:

Value

Description

Success, all criteria cleared.

-1

Failure.

Example

cob_criteria_clear(); /* continue with the rest of the applet */

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Grass-valley K2 TX/MAM Database Protocol Manual v.2.2 Manual de usuario Pagina 8