LENGTH returns an unscaled REAL FIXED BINARY value specifying
the current length of x.
 >>-LENGTH(x)---------------------------------------------------><
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- x
- String-expression. If x is binary, it is converted
to bit string; otherwise, any other conversion required is to character
string.
For an example of the LENGTH built-in function, refer to MAXLENGTH.
The BIFPREC compiler option determines the precision of the result
returned.
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