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==Purpose== Table constraint activated when the table is closed ==Syntax== ONCLOSE <procedure> ==See Also== [[ALTER TABLE]], [[SQL Constraints|CONSTRAINTS]], [[CREATE TABLE]] ==Description== A constraint is used to define rules that help to provide data integrity. TABLE constraints apply to table-based operations. You must have ALTER privilege on the table. The table will be locked for EXCLUSIVE use during the operation. The ONCLOSE table constraint is activated when the table is closed. The <procedure> specified must be a character expression evaluating to a procedure name. If no file extension is included, '.prg' is assumed. The specified procedure is run before the operation to close the table is executed. ==Example== <code lang="recital"> ALTER TABLE customer modify ONCLOSE "p_close" </code> ==Products== Recital, Recital Server [[Category:Documentation]] [[Category:SQL]]

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