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Annotation of 43BSD/ingres/doc/quel/range.nr, revision 1.1.1.1

1.1       root        1: .th RANGE QUEL 2/29/79
                      2: .sh NAME
                      3: range \- declare a variable to range over a relation
                      4: .sh SYNOPSIS
                      5: .bd "range of"
                      6: variable 
                      7: .bd is
                      8: relname
                      9: .sh DESCRIPTION
                     10: .it Range 
                     11: is used to declare variables which will be used in subsequent
                     12: \s-2QUEL\s0 statements.
                     13: The 
                     14: .it variable 
                     15: is associated with the relation specified by 
                     16: .it relname.
                     17: When the 
                     18: .it variable 
                     19: is used in subsequent statements it will refer
                     20: to a tuple in the named relation.
                     21: A range declaration remains in effect for an entire 
                     22: \*(II session
                     23: (until exit from \*(II), until the variable is redeclared by a subsequent
                     24: range statement, or until the relation is removed with the destroy command.
                     25: .sh EXAMPLE
                     26: .nf
                     27: /\*(** Declare tuple variable e to range over relation emp \*(**/
                     28:    range of e is emp
                     29: .fi
                     30: .sh "SEE ALSO"
                     31: quel(quel), destroy(quel)
                     32: .sh BUGS
                     33: Only 10 variable declarations may be in effect at any time.
                     34: After the 10th range statement,
                     35: the least recently referenced
                     36: variable is re-used for the next
                     37: range statement.

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