Database Management Reference Manual
Expressions : Numeric (Real) Expressions
Numeric (Real) Expressions
In AVEVA E3D™ expressions, integers are treated as reals; they are fully interchangeable. Numeric expressions can contain:
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Numbers, for example: 32, 10.1.
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Numbers can be given as integer exponents, for example: 10 exp 5, and 5 E 6.
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Values (numbers) can be qualified by units. This introduces dimensional analysis into the expression. The valid units are any standard appropriate unit qualifiers for example MM, M/etres, IN/ches, FT, FEET, kg, lb, kgf/m3, pascal. These may be preceded by SQU/are, CUBIC, CUB/e to denote non-linear Values, or alternatively they can have power indices appended. For example: 100 mm, 10 exp 5 cubic feet, 10m3, 20newton.m-2. Feet and inches can be shown as, for example, 10'6.
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AVEVA E3D™ attributes of type number, for example: XLEN.
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Position, direction and orientation attributes which have a subscript to indicate which part of the array is required. For example, POS[2] means the second element of the POSITION attribute; that is, the northing. Note that position, direction and orientation attributes without subscripts can only be used in number array expressions.
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The keyword PI (3.142).
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Numeric operators.
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Numeric functions.
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