DDS — DDS ISSUE# 16] Clarification of expression syntax

Ref-14 Relationship_of_IDL_and_expression_syntax

The fieldnames and topicnames used in SQL expressions need to be
language-independent. This means that they have to be derived from the
IDL-definition. The SQL description in Annex A/B does not define the
relationship between the FIELDNAME and the IDL definition.

Example, assume the following IDL definition:

module mymodule { struct mystruct

; };

The SQL statement could become "SELECT record AS value FROM
mymodule.mystruct ...".

The field "record" would be translated into "IDL_record" by an ADA
preprocessor. The SQL-statement should still use "record" to be
language independent. This is a generic situation that occurs for each
language when the name of the field matches a reserved keyword.

**PROPOSAL**

Improve specification "Annex A/B" stating that the syntax of the SQL
statement will match the names used in IDL not necessarily those of
the language mapping.

see below