- Fix in CegoBufferPool::calcHas and CegoBufferPool::calcSegement
For large file id's the integer range for the hash key might be
exceeded, which lead to wrong address calculation.
The hash key now is calculated in long based values
- Introduced server mode with same behaviour as daemon mode, but
no child process is forked and server can be terminated with Ctrl-C
- Small formatting fix in CegoOutput
- Fix in CegoDistCursor for inner and outer joins
Inner or outer joins with additional where condition might return
incorrect result set since the condition was just evaluated inside
the join.
To correct this, the WHERE condition is also checked via evalCondition.
This required also a fix in the evalCondition method.
- Added multi segment support to CegoBufferPool. Since the pool is
divided now into several memory segments, this allows larger buffer
pool configurations.
- Improvements for output formatting regarding string functions
(cegoFunction::getReturnTypeLen). Size of required column field size
is now calculated, so the outlook looks more pretty
- Added hints from David Binderman in CegoAction::backChar and
CegoBufferPage::printPage ( changed pointer comparison to avoid
-Wextra compile warnings ) Thanks !
Submitted by: Bjoern Lemke <lemke@lemke-it.com>
- Decreased default cache size values to 100k ( query + table )
- Next fileId (CegoXMLSpace::nextFID ) calculation now analyses the
existing fileId and uses the lowest available. The MAXFID attribute
in the database xml file is no more used. This avoids, that file
id exceeds in case of frequent creation and removement of tablesets.
- Some format correction in CegoAdminHandler
- Increased parameter FILMNG_MAXDATAFILE to 10000 and
TABMNG_MAXTABSET to 500
- Optimization added in CegoDisCursor::distSetup(CegoAttrCond)
If the native table cursor could not set up either FULL or PART, the
table cursor retrieved all available rows from the corresponding table.
In this case, the table also can be cached to improve subsequent
queries for this table. This fix is relevant for queries like
select * from t1 where b like '%X%', since the like condition
cannot be used by the table cursor
Submitted by: Bjoern Lemke <lemke@lemke-it.com>
- Fix in CegoSelect::nextTuple : in case of rowlimit > 0,
the cached entry was not added to query cache
- Added many columns sample to base test
( create, insert and select for table with 60 columns )
Submitted by: Bjoern Lemke <lemke@lemke-it.com>
- Fix in CegoAction::execViewCreate.
Views must be compiled successful now immediately after creation.
Otherwise, the calculated schema is not stored correctly into
dictionary.
- Fix in CegoFactor::getId.
If sysdate is used in queries, it should be resolved, otherwise
query couldbe used from cache which returns invalid result
Submitted by: Bjoern Lemke <lemke@lemke-it.com>
- In CegoQueryHelper::evalPredicate fixed termination for INSUB- and
NOTINB queries. There was no reset at the end of the evaluation, which
might lead to open table cursors. In case of procedure queries, this
might lead to locking problems.
Since the query is reset after evaluation, query caching is no more
useful. This must be treated in an advanced way.
- Further patches in CegoTableManager::deleteDataTable,
CegoFactor::evalReferences and CegoSelect::nextTuple for advanced
query cache handling. All patches have impact on queries of the form
DELETE FROM t1 WHERE a IN ( SELECT ....)
Submitted by: Björn Lemke <lemke@lemke-it.com>
- Added performance patch in CegoFieldValue.
Values with a length up to STATICFIELDBUF size ( 100 bytes ) are handled
using a static byte array. This saves expensive memory allocation
calls in most cases. First very rough performances analysis has
shown a performance improvement of about 5-10 percent
- The local copy logic was shifted from CegoSelect::nextGroupedTuple
to CegoGroupSpace::insertTuple.
Submitted by: Björn Lemke <lemke@lemke-it.com>
- Fix in CegoSelect::nextGroupedTuple.
For the 'grouping key' values, a local copy of CegoFieldValue has to be
created. Otherwise, grouping references might be invalidated, which result
in aborted grouping queries with strange error message ( No token
available ) on client side.
For local copy creation, the CegoFieldValue::getLocalCopy method has
been modified ( was not used until now ).
This effect was observed with small buffer poolsizes in
combination with grouping queries on large tables. The probability
of grouping key invalidation is higher in that case, because
buffer pool pages are reloaded more often.
Submitted by: Björn Lemke <lemke@lemke-it.com>
- Performance fix in CegoSelect::consolidateConjunctionList
Inappropriate predicates are filtered and added to stack first.
As a result, predicates are used for table join binding,
so that efficient tuple retrievel is ensured.
- The fix also avoids infinite query loops for non-reference conditions,
e.g. select a from t1 where 1 = 1;
Submitted by: Björn Lemke <lemke@lemke-it.com>
- Simplification in CegoBTreeManager and CegoBTreeNode.
Calculation of leaf node chain is now much simpler. This ensures
consistency and improves btree build up performance.
- Fix for btree page count and btree page release. Some of the btree
nodes have double references, which was not treated in the page count
and page release algorithm.
- Changed default primary and secondary values for tableset definition
command to the configured hostname. This simplifies the define command
in case of single node tableset configurations.
Submitted by: Björn Lemke <lemke@lemke-it.com>
databases/cego: 2.23.6 -> 2.23.7
lfcbase: Fix in Chain::visibleLength.
Calculation may result in an infiite loop, if mbtowc returns zero.
cego:
- Fix in CegoFieldValue for VARCHAR comparison. In case of exceeded
string length for index values, the CegoFieldValue did not work
correctly.
- Fix in CegoClient for dump mode. BTrees habe not been dumped with
the correct type ( primary, unique, normal )
Submitted by: Björn Lemke <lemke@lemke-it.com>
- Fix in CegoSelect::buildJoinTables.
After growStep match, growStep is now reset to 1.
This avoids to add tables to the joinlist, which are still not
treated for any appropriate join condition. As an effect of this
bug, execution plan is not evaluated in an optimal manner, which
might lead to long execution times
- Fix in CegoTableManager::insertDataTable, in case of constraint
violation, btrees have not been cleaned up. This may result in
inconsistent btree objects.
- Added a fix in CegoTableManager::updateTuple.
The core operation consists of a deleteDataTable and a
insertDataTable method call. For the insertDataTable method call,
the logging still was enabled. So in addition to an update
operation, also an insert operation was done. In case of recovery
operations, this lead to duplicate entries. Fix:
just change isLogging parameter value for insertDataTable method
from true to false.
Submitted by: Björn Lemke <lemke@lemke-it.com>
- Added uptime command for cgclt to show database uptime
- Added pool uptime to buffer pool information, this indicates the
database uptime
- Several fixes for cgmkdb utility
Submitted by: lemke@lemke-it.com
- Introduced CegoDatabaseFormater.
Since the API has changed (proagation of database formatting methods),
this is 2.23.0
Submitted by: Björn Lemke <lemke@lemke-it.com>
databases/cego: 2.21.1 -> 2.22.0
databases/p5-DBD-cego: 1.2.9 -> 1.3.0
lfcbase:
- Added syslog support
- syslog is enabled per default
cego:
- fix in CegoFieldValue::comp for correct null value ordering
- adapt to lfcbase 1.6 with syslog support
p5-DBD-cego:
- adapt to lfcbase 1.6 with syslog support
Submitted by: Björn Lemke <lemke@lemke-it.com>
- Fixes for btree handling. Some field value offsets have been corrected
based on experiences with SAGE db import
- Improved error messages for CegoLockHandler to indicate low level lock
error messages from pthread calls
- Added sudo command to cego rc script to run db as given user
Submitted by: lemke@lemke-it.com
- Urgent fix in CegoFieldValue::comp method.
New introduced null value comparison might result in a dump.
Since, the new btree null value extension breaks specification
to version 2.20, update to version 2.21 was required.
Submitted by: lemke@lemke-it.com
- Added multibyte character evaluation in CegoOutput to show visible
chain length
- added build_depends for a specific version of lfcbase
Submitted by: lemke@lemke-it.com
- Fix on update query for referenced attributes in nested select like
update t1 tx set b = ( select d from t2 where t1.a = c )
This table alias was not resolved correctly.
Submitted by: lemke@lemke-it.com
- SQL optimizer improvement was added. In case of select conditions
with "a is null", neither index nor btree was used. Just for "a = null",
the index was used. This has been fixed.
- Added fix for btree null value handling. A dedicated null value
flag was introduced for each btree value ( class CegoBTreeValue )
to handle null values.
Submitted by: lemke@lemke-it.com
- Added command line parameter validation for poolsize, numdbthread,
numadminthread and numlogthread parameters
- Fix in CegoFactor::evalFieldValue : For the QUERY case, the select
instance was not reset. Since the query starts from a undefined point,
this might lead to "list position exceeded" exceptions
- Fix in CegoQueryHelper::evalSelection for isAgg-case
Submitted by: Björn Lemke <lemke@lemke-it.com> (author)
Change for primary and secondary host evaluation.
Instead of comparing gethostbyname, the defined dbhost value is used.
This helps if the configured dbhost does not match with the result
value of gethostbyname (e.g. is multiple hostnames are configured
on a database server)
Submitted by: Björn Lemke <lemke@lemke-it.com>
- Added restricted access for JDBC information requests
The jdbc role now is required to perform any JDBC information requests.
- A problem occured with inner and outer joins if the same table
occurs two times or more in the query
For the CegoAttrComp class, the tablealias name is stored now to
evaluate if the compare is appropriate for the corresponding table
- Small optimization in CegoDisManager::updateLocalDataTable
Instead of requesting a new lock for the commitment phase, the lock we
already have is also used for the commit in case of forecedTransactions
( update case ).
- This ensures, that the forced transaction can be done without
risking to not obtain the lock for the corresponding table again.
Submitted by: Björn Lemke <lemke@lemke-it.com>
- Fix in CegoQueryHelper::decodeFVL to treat also decodings for
field value list in switched order ( btree or index fvl )
- Fix in CegoAction::execIndexCheck to conform to new object comparison
in CegoDatabaseManager::ObjectRecord
- Fix in CegoTableManager::deleteDataTable to check for inappropriate
AttrCond before executing tablecursor setup
- Fix in CegoDatabaseManager::Object::operator == Index comparisons
corrected ( index can either match uindex, pindex or index, btree
can either match ubtree, pbtree or btree )
Submitted by: Björn Lemke <lemke@lemke-it.com>
- Fix in CegoQueryHelper::evalAttrCond. In some table ordering cases,
the attributes had been switched and the evaluation was wrong
( LESS_THAN, MORE_THAN, LESS_EQUAL_THAN, MORE_EQUAL_THAN ).
Submitted by: Björn Lemke <lemke@lemke-it.com>
- Recovery added for check constraints and foreign keys
- Corrections for btree recovery, btree creation was not performed
correctly during tableset recovery. Tableset autocorrect mode is
enabled on default now ( by define tableset )
Submitted by: Björn Lemke <lemke@lemke-it.com>
