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Managing ABL Applications
R-code Features and Functions : Database CRCs and time stamps : CRC validation

CRC validation

For each table, OpenEdge computes a CRC value (database CRC) from selected elements of the table metaschema. When compiling a procedure, OpenEdge inserts the database CRC for each database table the procedure accesses. The database CRC for each table is stored in the metaschema _File record _CRC field for the table. A matching CRC ensures that the schema referenced by the r-code is compatible with the table schema, regardless of its time stamp.
* Time stamps and CRCs
* R-code execution with CRCs