CDD/Plus Dictionary Data Definition Language Utility QUERY_HEADER — VMS CDD+_4.1A
The QUERY_HEADER field attribute clause provides a label that VAX DATATRIEVE uses as a column heading for the field in printouts and reports.
Additional information available:
ParameterSyntax RulesUsage NotesExample
Parameter
dtrqh_quoted_string
The VAX DATATRIEVE query header.
Syntax Rules
o The quoted string must be a valid VAX DATATRIEVE query header.
The CDDL compiler does not check the quoted string for correct
syntax.
o Quoted strings must be separated from each other by a space, tab,
or comma.
Usage Notes
o Only VAX DATATRIEVE supports the QUERY_HEADER clause. Other
language processors ignore it.
o If you specify more than one quoted string, VAX DATATRIEVE stacks
them. Use multiple quoted strings to specify long query headers.
o You can use 8-bit characters in CDDL quoted strings.
Example
In the following example, the QUERY_HEADER clause specifies that VAX
DATATRIEVE use TOTAL PRICE as the column header for the field
TOTAL_PRICE.
TOTAL_PRICE DATATYPE IS VIRTUAL FIELD
COMPUTED BY DTR AS
"UNIT_PRICE * QUANTITY"
QUERY_HEADER FOR DTR IS "TOTAL PRICE".