On 15/03/2022 14:39, Vlad Khorsun wrote: > 15.03.2022 19:27, Dmitry Yemanov wrote: >> 15.03.2022 20:17, Vlad Khorsun wrote: >>> >>>> For me, "created" LTT is similar to GTT (i.e. stored in the schema) >>>> but with data isolated per request (per PSQL routine). >>> >>> I'd consider about CREATE'd LTT as attachment-private object. I see >>> no need to store its definition at the persistent schema. >> >> If multiple procedures process the same layout of temporary data, IMHO >> it's handier to create such LTT definition once (as persistent) rather >> than declare the same LTT in the every procedure (or attachment). > > First, CREATE'd LTT's have the visibility scope and lifetime of the > attachment. > Its definition is not seen by other attachments and every attachment > could have > LTT with the same name and different definition. Second, attachment > could have > private part (instance) of metadata cache that will contains definitions > of every > CREATE'd LTT and every statement could use it without additional penalty. > > No need to pollute persistent schema with temporary objects and pay > runtime > cost for storing\erasing such definitions. >
So CREATEd LTTs cannot be used in PSQL routines, only by DSQL? Adriano Firebird-Devel mailing list, web interface at https://lists.sourceforge.net/lists/listinfo/firebird-devel
