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log
Library: ib_udf
Added in: IB
Changed in: 1.5
Better alternative: Internal function LOG()
Description
In Firebird 1.5 and up, log(x,y) returns the the base-x logarithm of y. In Firebird 1.0.x and InterBase, it erroneously returns the base-y logarithm of x.
Result type: DOUBLE PRECISION
Syntax (unchanged)
log (x, y)
Declaration (unchanged)
DECLARE EXTERNAL FUNCTION log DOUBLE PRECISION, DOUBLE PRECISION RETURNS DOUBLE PRECISION BY VALUE ENTRY_POINT 'IB_UDF_log' MODULE_NAME 'ib_udf'
Warning: If any of your pre-1.5 databases uses log, check your PSQL and application code. It may contain workarounds to return the right results. Under Firebird 1.5 and up, any such workarounds should be removed or you'll get wrong results.