Reference for Oracle GoldenGate Oracle GoldenGate Common Components Table and Column Mapping Functions @OGG_SHA1 @OGG_SHA1 Use the OGG_SHA1 function to return the SHA-1 160 bit / 20 bytes hash value. SyntaxOGG_SHA1(expression) expression The name of a column, literal string, other column mapping function. ExampleOGG_SHA1(col_name)