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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