Literals express values outside of pre-defined application objects. Because literals have no definition in the Object Dictionary, the software assumes a data type for each literal. This implicit data type is determined based on the characters contained in the value, and on whether or not the value is enclosed in quotation marks. Literals that are…
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The software automatically determines if it can use indexes when it looks for records in the database. If the software cannot use an available index, each record in the record-containing objects must be scanned (a potentially slower process). In some cases, the software cannot use an available index if the data type of the indexed…
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ALPHA/CHAR and VARALPHA/ VARCHAR Values If an ALPHA or CHAR object is assigned the value abc///// (with five trailing blanks), it is stored as abc///// (fixed length value). If a VARALPHA or VARCHAR object is assigned the value abc/////, it is stored as abc without any trailing blanks, but with an indicator that gives the…
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Zim performs conversions and operations between data types in a different manner than other application development languages. The rules for conversions are embedded in Zim itself, and when performing conversions or comparisons, these rules govern how the different data types are handled. Implicit Conversions In general, when you write an expression, you can use objects…
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