Progress
DataServer
for ORACLE Guide


Unknown Value

Table 5–8 shows how the Progress-to-ORACLE migration utility maps Progress unknown values and zero-length character strings to ORACLE values.

Table 5–8: Unknown Value Mapping 
Progress Value
ORACLE Value
? (Unknown value)
NULL
"" (Zero-length character string)
" " (One space)
" " (One space)
" " (One space)

Strings that contain one or more blank spaces in a unique index might cause an error when you attempt to load data. The blank spaces are stripped out, therefore the strings are no longer unique.


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