Oracle 5.0 Reference Manual page 474

Variable Name
Variable Scope
Dynamic Variable
The maximum permitted result length in bytes for the
is 1024.
• [454]
have_archive
if supports
YES mysqld
• [454]
have_bdb
if supports
YES mysqld
•
have_blackhole_engine
if supports
YES mysqld
•
have_community_features
if statement profiling capability is present,
YES
controls whether this capability is enabled or disabled. See
Syntax".
This variable was added in MySQL 5.0.82.
• [454]
have_compress
if the compression library is available to the server,
YES zlib
[954] and
COMPRESS()
• [454]
have_crypt
if the
YES crypt()
function cannot be used.
• [454]
have_csv
if supports
YES mysqld
•
have_example_engine
if supports
YES mysqld
Server System Variables
group_concat_max_len
Global, Session
Yes
Permitted Values
Platform
32
Bit Size
Type
numeric
Default
1024
Range
4 .. 4294967295
Permitted Values
Platform
64
Bit Size
Type
numeric
Default
1024
Range
4 .. 18446744073709547520
tables,
ARCHIVE NO
tables.
BDB DISABLED
[454]
tables,
BLACKHOLE
[454]
[957]
UNCOMPRESS()
system call is available to the server,
tables, if not.
CSV NO
[454]
tables,
EXAMPLE NO
454
GROUP_CONCAT()
if not.
if [420]
--skip-bdb
if not.
NO
if not. If present, the
NO
Section 13.7.5.29,
if not. If not, the
NO
functions cannot be used.
if not. If not, the
NO
if not.
[970] function. The default
is used.
system variable
profiling
"SHOW PROFILES
[955]
ENCRYPT()