| Firebird Documentation Index → Firebird 1.5 Language Ref. Update → External functions (UDFs) → log |
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Library: ib_udf
Changed in: 1.5
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.
Return 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'
If any of your pre-1.5 databases use 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 the wrong results.
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| Firebird Documentation Index → Firebird 1.5 Language Ref. Update → External functions (UDFs) → log |