Firebird 2.1 Language Reference Update

Notes:
Internal functions
select trim (leading from ' Waste no space ') from rdb$database
-- returns 'Waste no space '
select trim (leading '.' from ' Waste no space ') from rdb$database
-- returns ' Waste no space '
select trim (trailing '!' from 'Help!!!!') from rdb$database
-- returns 'Help'
select trim ('la' from 'lalala I love you Ella') from rdb$database
-- returns ' I love you El'
select trim ('la' from 'Lalala I love you Ella') from rdb$database
-- returns 'Lalala I love you El'
• If str is a BLOB, the result is a BLOB. Otherwise, it is a VARCHAR(n) with n the formal length of str.
• The substring to be removed, if specified, may not be bigger than 32767 bytes. However, if this substring is
repeated at str's head or tail, the total number of bytes removed may be far greater. (The restriction on the
size of the substring will be lifted in Firebird 3.)
Warning
When used on a BLOB, this function may need to load the entire object into memory. This may affect performance
if huge BLOBs are involved.
Available in: DSQL, PSQL
Added in: 2.1
TRUNC()
Description: Returns the integer part of a number. With the optional scale argument, the number can be truncated
to powers-of-ten multiples (tens, hundreds, tenths, hundredths, etc.) instead of just integers.
Result type: INTEGER, (scaled) BIGINT or DOUBLE
Syntax:
TRUNC ( [, ])
::= a numerical expression
::= an integer specifying the number of decimal places
toward which should be truncated, e.g.:
2 for truncating to a multiple of 0.01
1 for truncating to a multiple of 0.1
0 for truncating to a whole number
-1 for truncating to a multiple of 10
-2 for truncating to a multiple of 100
162