ISO/IEC 9075-9:2016 情報技術—データベース言語— SQL —パート9：外部データの管理（SQL / MED） | ページ 6

3.1.2.1

access token

encrypted value returned under certain conditions by an SQL-server in combination with the File Reference of a datalink value

Note 1 to entry: An access token is either a read token or a write token.

3.1.2.2

datalink

value, of data type DATALINK, referencing some file that is not part of the SQL-environment

Note 1 to entry: The file is assumed to be managed by some external file manager.

3.1.2.3

datalinker

implementation-dependent component for enabling integrity control, recovery, and access control for external files

3.1.2.4

external data

data that is not managed by an SQL-server involved in an SQL-session, but that is nevertheless accessible to that SQL-session

3.1.2.5

foreign-data wrapper

named collection of routines, invocable by the SQL-server, supporting the programming interface specified for such routines in this part of ISO/IEC 9075

3.1.2.6

foreign server

named server, external to the SQL-environment, but known to the SQL-server, that manages external data

3.1.2.7

foreign server request

statement that an SQL-server submits to a foreign-data wrapper

3.1.2.8

foreign table

named table whose rows are supplied when needed by some foreign server

Note 1 to entry: The mechanism by which these rows are supplied is provided by a foreign-data wrapper. The data constituting a foreign table is not part of the SQL-environment.

3.1.2.9

integrity control option

link control option specifying the level of integrity of the link between a datalink and the file that it references

3.1.2.10

link control

property of a column of data type DATALINK, specifying the extent to which the links between datalinks in that column and the files they reference are to be monitored (in various specific manners)

3.1.2.11

read permission option

link control option specifying how permission to read external files referenced by certain datalinks is determined

3.1.2.12

recovery option

link control option specifying whether or not point in time recovery is required for the files referenced by certain datalinks

3.1.2.13

routine mapping

implementation-defined mapping of an SQL-invoked routine to an equivalent concept maintained by a foreign server

3.1.2.14

SQL/MED-implementation

SQL-implementation that processes SQL-statements that are possibly extended by the language defined in this part of ISO/IEC 9075

Note 1 to entry:A conforming SQL/MED-implementation is an SQL/MED-implementation that satisfied the requirements for SQL/MED-implementations as defined in Clause 27, “Conformance”.

3.1.2.15

unlink option

link control option specifying the action to be taken when certain sites occupied by datalinks are updated or deleted

3.1.2.16

user mapping

implementation-defined mapping of an authorization identifier to an equivalent concept maintained by a foreign server

3.1.2.17

write permission option

link control option specifying how permission to write files referenced by certain datalinks is determined