LOG()

Tip

Find a more recent version at Firebird 5.0 Language Reference: LOG()

Available in: DSQL, PSQL

Added in: 2.1

Changed in: 2.5

Description: Returns the x-based logarithm of y.

Result type: DOUBLE PRECISION

Syntax:

LOG (x, y)
If either argument is 0 or below, an error is raised. (Before 2.5, this would result in NaN, ±INF or 0, depending on the exact values of the arguments.)

If both arguments are 1, NaN is returned.

If x = 1 and y < 1, -INF is returned.

If x = 1 and y > 1, INF is returned.

Important

If the external function LOG is declared in your database, it will override the internal function. To make the internal function available, DROP or ALTER the external function (UDF).