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Quantified Predicate (quantified_predicate) Locate the document in its SAP Library structure

By specifying a quantified predicate (quantified_predicate), you can compare a value or list of values to a set of values or value lists.

Syntax

<quantified_predicate> ::=
  <expression> <comp_op> <quantifier> <expression_list>
| <expression> <comp_op> <quantifier> <subquery>
| <expression_list> <equal_or_not> <quantifier> (<expression_list>,...)
| <expression_list> <equal_or_not> <quantifier> <subquery>

The following comparison operators are available to compare values:
<comp_op> ::= < | > | <> | != | = | <= | >=
|
~= | ~< | ~> (for computers with ASCII code)

Value lists can only be compared using the following operators: <equal_or_not> ::= <> |=
|
~| ~= | ~< | ~> (for computers with ASCII code)

The quantified predicate can be qualified with ALL, SOME, or ANY.

<quantifier> ::= ALL | SOME | ANY

Explanation

The subquery (subquery) must supply a result table that contains the same number of columns as the number of values specified by the expression or expression list on the left-hand side of the operator.

Each list of values specified to the right of the equal_or_notoperator expression_list must contain the same number of values as specified in the value list in front of the equal_or_notoperator.

·        Let x be the result of the first expression and S the result of the subquery or sequence of values. S is a set of values s. The value x and the values in S must be comparable with each other.

·        If a value list (expression_list) is specified on the left of the comparison operator equal_or_not, then let x be the value list comprising the results of the values x1, x2, ..., xn of this value list. Let S be the result of the subquery consisting of a set of value lists s or a sequence of value lists s. A value list s consists of the results of the values s1, s2, ..., sn. A value xm must be comparable with all values sm.
x=s is true if xm=sm, m=1,...,n
x<>s is true if there is at least one m for which xm<>sm
x
<equal or not> s is undefined if there is no m for which xm <equal or not> sm is false and if there is at least one m for which xm <equal_or_not> sm is undefined.
If one xm or one ym is a NULL value, or if the result of the subquery is empty, x
<equal_or_not> y is undefined.

The entry '------' in the list below means that no statement can be made if only the result of the comparison with one s is known.

x <compare> <quantifier> S, whereby compare ::= comp_op | equal_or_not

 

quantifier ::= ALL

quantifier ::= ANY | SOME

S is empty

True

False

x <compare> S is true for at least one s from S

------

True

x <compare> S is true for all s from S

True

True

x <compare> S is not false for any value from S and is undefined for at least one value s

Undefined

 

S contains NULL values and x <compare> S is true for all other s

Undefined

True

x <compare> S is false for at least one value s from S

False

------

x <compare> S is false for all s from S

False

False

x <compare> S is not true for any value s from S and is undefined for at least one value s

 

Undefined

S contains NULL values and x <compare> S is false for all other s

False

Undefined

 

 

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