- announce-list - monetdb.org

MonetDB.Net on Nuget
by Sjoerd Mullender 27 Oct '21

27 Oct '21

The MonetDB team at MonetDB BV is pleased to announce the release of MonetDB.Net on NuGet: https://www.nuget.org/packages/MonetDB/ To install the package from within Visual Studio: Go to Tools -> NuGet Package Manager -> Package Manager Console -> Type: Install-Package MonetDB -Version 2.1.2 Or Tools -> NuGet Package Manager -> Manage NuGet Packages for Solution and search for MonetDB. -- Sjoerd Mullender

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Announcement: New Jul2021-SP1 Bugfix release of MonetDB suite
by Sjoerd Mullender 05 Oct '21

05 Oct '21

The MonetDB team at MonetDB BV is pleased to announce the Jul2021-SP1 bugfix release of the MonetDB suite of programs. More information about MonetDB can be found on our website at <https://www.monetdb.org/>. For details on this release, please see the release notes at <https://www.monetdb.org/Downloads/ReleaseNotes>. As usual, the download location is <https://www.monetdb.org/downloads/>. Jul2021-SP1 Bugfix Release (11.41.11) MonetDB Common * Some deadlock and race condition issues were fixed. * Handling of the list of free bats has been improved, leading to less thread contention. * A problem was fixed where the server wouldn't start with a message from BBPcheckbats about files being too small. The issue was not that the file was too small, but that BBPcheckbats was looking at the wrong file. * An issue was fixed where a "short read" error was produced when memory was getting tight. * When appending to a string bat, we made an optimization where the string heap was sometimes copied completely to avoid having to insert strings individually. This copying was still done too eagerly, so now the string heap is copied less frequently. In particular, when appending to an empty bat, the string heap is now not always copied whole. SQL Frontend * If the server has been idle for a while with no active clients, the write-ahead log is now rotated. * A problem was fixed where files belonging to bats that had been deleted internally were not cleaned up, leading to a growing database (dbfarm) directory. * A leak was fixed where extra bats were created but never cleaned up, each taking up several kilobytes of memory. * [This feature was already released in Jul2021 (11.41.5), but the ChangeLog was missing] Grant indirect privileges. With "GRANT SELECT ON <my_view> TO <another_user>" and "GRANT EXECUTE ON FUNCTION <my_func> TO <another_user>", one can grant access to "my_view" and "my_func" to another user who does not have access to the underlying database objects (e.g. tables, views) used in "my_view" and "my_func". The grantee will only be able to access data revealed by "my_view" or conduct operations provided by "my_func". * Improved error reporting in COPY INTO by giving the line number (starting with one) for the row in which an error was found. In particular, the sys.rejects() table now lists the line number of the CSV file on which the record started in which an error was found. Bug Fixes * 7140: SQL Query Plan Non Optimal with View * 7162: Extend sys.var_values table * 7165: `JOINIDX: missing '.'` when running distributed join query on merged remote tables * 7172: Unexpected query result with merge tables * 7173: If truncate is in transaction then after restart of MonetDB the table is empty * 7178: Remote Table Throws Error - createExceptionInternal: !ERROR: SQLException:RAstatement2:42000!The number of projections don't match between the generated plan and the expected one: 1 != 1200

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Announcement: New Jul2021 Feature release of MonetDB suite
by Sjoerd Mullender 09 Aug '21

09 Aug '21

The MonetDB team at MonetDB BV is pleased to announce the Jul2021 feature release of the MonetDB suite of programs. More information about MonetDB can be found on our website at <https://www.monetdb.org/>. For details on this release, please see the release notes at <https://www.monetdb.org/Downloads/ReleaseNotes>. As usual, the download location is <https://www.monetdb.org/downloads/>. Jul2021 Feature Release (11.41.5) Client Package * The MonetDB stethoscope has been removed. There is now a separate package available with PIP (monetdb_stethoscope) or as an RPM or DEB package (stethoscope) from the monetdb.org repository. Mapi Library * Add optional MAPI header field which can be used to immediately set reply size, autocommit, time zone and some other options, see mapi.h. This makes client connection setup faster. Support has been added to mapilib, pymonetdb and the jdbc driver. ODBC Driver * A typo that made the SQLSpecialColumns function unusable was fixed. MonetDB Common * A bug in the grouping code has been fixed. * Hash indexes are no longer maintained at all cost: if the number of distinct values is too small compared to the total number of values, the index is dropped instead of being maintained during updates. * A new type, called msk, was introduced. This is a bit mask type. In a bat with type msk, each row occupies a single bit, so 8 rows are stored in a single byte. There is no NULL value for this type. * The function of the BAT iterator (type BATiter, function bat_iterator) has been expanded. The iterator now contains more information about the BAT, and it contains a pointer to the heaps (theap and tvheap) that are stable, at least in the sense that they will remain available even when parallel threads update the BAT and cause those heaps to grow (and therefore possibly move in memory). A call to bat_iterator must now be accompanied by a call to bat_iterator_end. * Implemented function BUNreplacemultiincr to replace multiple values in a BAT in one go, starting at a given position. * Implemented new function BUNreplacemulti to replace multiple values in a BAT in one go, at the given positions. * Removed function BUNinplace, just use BUNreplace, and check whether the BAT argument is of type TYPE_void before calling if you don't want to materialize. * Implemented a function BUNappendmulti which appends an array of values to a BAT. It is a generalization of the function BUNappend. * Changed the interface of the atom read function. It now requires an extra pointer to a size_t value that gives the current size of the destination buffer, and when that buffer is too small, it receives the size of the reallocated buffer that is large enough. In any case, and as before, the return value is a pointer to the destination buffer. * Environment variables (sys.env()) must be UTF-8, but since they can contain file names which may not be UTF-8, there is now a mechanism to store the original values outside of sys.env() and store %-escaped (similar to URL escaping) values in the environment. The key must still be UTF-8. * We now save the location of the min and max values when known. MonetDB5 Server * When using the --in-memory option, mserver5 will run completely in memory, i.e. not create a database on disk. The server can still be connected to using the name of the in-memory database. This name is "in-memory". * By using the option "--dbextra=in-memory", mserver5 can be instructed to keep transient BATs completely in memory. SQL Frontend * The system view sys.ids has been updated to include some more system IDs. * The sys.storage() function now only returns meta data, i.e. data that can be calculated without access to the column contents. * Since STREAM tables support is removed, left over STREAM tables are dropped from the catalog. * Fix a warning emitted by some implementations of the tar(1) command when unpacking hot snapshot files. * support reading the concatenation of compressed files as a single compressed file. * COPY BINARY overhaul. Allow control over binary endianness using COPY [ (BIG | LITTLE | NATIVE) ENDIAN] BINARY syntax. Defaults to NATIVE. Strings are now \0 terminated rather than \n. Support for BOOL, TINYINT, SMALLINT, INT, LARGEINT, HUGEINT, with their respective "INTMIN" values as the NULL representation; 32 and 64 bit FLOAT/REAL, with NaN as the NULL representation; VARCHAR/TEXT, JSON and URL with \x80 as the NULL representation; UUID as fixed width 16 byte binary values, with (by default) all zeroes as the NULL representation; temporal type structs as defined in copybinary.h with any invalid value as the NULL representation. * In the Jul2021 release the storage and transaction layers have undergone major changes. The goal of these changes is robust performance under inserts/updates and deletes and lowering the transaction startup costs, allowing faster (small) queries. Where the old transaction layer duplicated a lot of data structures during startup, the new layer shares the same tree. Using object timestamps the isolation of object is guaranteed. On the storage side the timestamps indicate whether a row is visible (deleted or valid), to a transaction as well. The changes also give some slight changes on the perceived transactional behavior. The new implementation uses shared structures among all transactions, which do not allow multiple changes of the same object. And we then follow the principle of the first writer wins, i.e., if a transaction creates a table with name 'table_name', and concurrently one other transaction does the same the later of the two will fail with a concurrency conflict error message (even if the first writer never commits). We expect most users not to notice this change, as such schema changes aren't usually done concurrently. * There is now a function sys.current_sessionid() to return the session ID of the current session. This ID corresponds with the sessionid in the sys.queue() result. * Merge statements could not produce correct results on complex join conditions, so a renovation was made. As a consequence, subqueries now have to be disabled on merge join conditions. * preserve in-query comments * Use of CTEs inside UPDATE and DELETE statements are now more restrict. Previously they could be used without any extra specification in the query (eg. with "v1"("c1") as (...) delete from "t" where "t"."c1" = "v1"."c1"), however this was not conformant with the SQL standard. In order to use them, they must be specified in the FROM clause in UPDATE statements or inside a subquery. * Added 'schema path' property to user, specifying a list of schemas to be searched on to find SQL objects such as tables and functions. The scoping rules have been updated to support this feature and it now finds SQL objects in the following order: 1. On occasions with multiple tables (e.g. add foreign key constraint, add table to a merge table), the child will be searched on the parent's schema. 2. For tables only, declared tables on the stack. 3. 'tmp' schema if not listed on the 'schema path'. 4. Session's current schema. 5. Each schema from the 'schema path' in order. 6. 'sys' schema if not listed on the 'schema path'. Whenever the full path is specified, ie "schema"."object", no search will be made besides on the explicit schema. * To update the schema path ALTER USER x SCHEMA PATH y; statement was added. [SCHEMA PATH string] syntax was added to the CREATE USER statement. The schema path must be a single string where each schema must be between double quotes and separated with a single comma, e.g. '"sch1","sch2"' For every created user, if the schema path is not given, '"sys"' will be the default schema path. * Changes in the schema path won't be reflected on currently connected users, therefore they have to re-connect to see the change. Non existent schemas on the path will be ignored. * Leftover STREAM table definition from Datacell extension was removed from the parser. They had no effect anymore. Merovingian * Deprecate `profilerstart` and `profilerstop` commands. Since stethoscope is a separate project (https://github.com/MonetDBSolutions/monetdb-pystethoscope) the installation directory is not standard anymore. `profilerstart` and `profilerstop` commands assume that the stethoscope executable is in the same directory as `mserver5`. This is no longer necessarily true since stethoscope can now be installed in a python virtual environment. The commands still work if stethoscope is installed using the official MonetDB installers, or if a symbolic link is created in the directory where `mserver5` is located. * The exittimeout value can now be set to a negative value (e.g. -1) to indicate that when stopping the dbfarm (using monetdbd stop dbfarm), any mserver5 processes are to be sent a termination signal and then waited for until they terminate. In addition, if exittimeout is greater than zero, the mserver5 processes are sent a SIGKILL signal after the specified timeout and the managing monetdbd is sent a SIGKILL signal after another five seconds (if it didn't terminate already). The old situation was that the managing monetdbd process was sent a SIGKILL after 30 seconds, and the mserver5 processes that hadn't terminated yet would be allowed to continue their termination sequence. Bug Fixes * 2030: Temporary table is semi-persistent when transaction fails * 7031: I cannot start MoentDb, because the installation path has Chinese. * 7055: Table count returning function used inside other function gives wrong results. * 7075: Inconsistent Results using CTEs in Large Queries * 7079: WITH table AS... UPDATE ignores the WHERE conditions on table * 7081: Attempt to allocate too much space in UPDATE query * 7093: `current_schema` not in sys.keywords * 7096: DEBUG SQL statement broken * 7115: Jul2021: ParseException while upgrading Oct2020 database * 7116: Jul2021: Cannot create filter functions * 7125: MonetDB Round Function issues in the latest release * 7126: The "lower" and "upper" functions doesn't work for Cyrillic alphabet * 7127: Bug report: "write error on stream" that results in mclient crash * 7128: Bug report: strange error message "Subquery result missing" * 7129: Bug report: TypeException:user.main[19]:'batcalc.between' undefined * 7130: Bug report: TypeException:user.main[396]:'algebra.join' undefined * 7131: Bug report: TypeException:user.main[273]:'bat.append' undefined * 7133: WITH <alias> ( SELECT x ) DELETE FROM ... deletes wrong tuples * 7136: MERGE statement is deleting rows if the column is set as NOT NULL even though it should not * 7137: Segmentation fault while loading data * 7138: Monetdb Python UDF crashes because of null aggr_group_arr * 7141: COUNT(DISTINCT col) does not calculate correctly distinct values * 7142: Aggregates returning tables should not be allowed * 7144: Type up-casting (INT to BIGINT) doesn't always happen automatically * 7146: Query produces this error: !ERROR: Could not find %102.%102 * 7147: Internal error occurs and is not shown on the screen * 7148: Select distinct is not working correctly * 7151: Insertion is too slow * 7153: System UDFs lose their indentation - Python functions broken * 7158: Python aggregate UDF returns garbage when run on empty table * 7161: fix priority

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New MonetDB JDBC driver released
by Sjoerd Mullender 16 Jun '21

16 Jun '21

The MonetDB team at MonetDB BV is pleased to announce a bugfix release of the MonetDB Java jars and JDBC driver. We recommend all users of MonetDB JDBC driver to upgrade to version: monetdb-jdbc-3.1.jre8.jar The download location is as usual: <https://www.monetdb.org/downloads/Java/>. For a list of changes please read: <https://www.monetdb.org/downloads/Java/ChangeLog>. For information and tips on using the MonetDB JDBC driver, see: <https://www.monetdb.org/downloads/Java/release.txt>. Note: as of release monetdb-jdbc-3.0.jre8.jar the MonetDB JDBC Driver class name has been changed to: org.monetdb.jdbc.MonetDriver It used to be nl.cwi.monetdb.jdbc.MonetDriver which is now marked as deprecated. Please use the new driver class name asap in your configuration files/scripts and/or Java code. The old driver class name is still included in the jar file to ease the transition for existing deployments. However it will be removed in a future release of the MonetDB JDBC driver. -- Sjoerd Mullender

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Announcement: New Oct2020-SP5 Bugfix release of MonetDB suite
by Sjoerd Mullender 10 May '21

10 May '21

The MonetDB team at MonetDB BV is pleased to announce the Oct2020-SP5 bugfix release of the MonetDB suite of programs. More information about MonetDB can be found on our website at <https://www.monetdb.org/>. For details on this release, please see the release notes at <https://www.monetdb.org/Downloads/ReleaseNotes>. As usual, the download location is <https://www.monetdb.org/downloads/>. Oct2020-SP5 Bugfix Release (11.39.17) Windows Packaging * Added the monetdbe library to the Windows installer. MonetDB Common * A bug that would very occasionally produce an error "strPut: incorrectly encoded UTF-8", even when no incorrectly coded characters are used at all, has been fixed. It was the result of a rare combination of strings having been added to the column that caused essentially an off-by-one type of error to occur. SQL Frontend * A bug where a sequence of TRUNCATE TABLE and COPY INTO the just truncated table would result in success being reported to both queries, but the table still being empty afterwards, has been fixed. Merovingian * When stopping monetdbd using the `monetdbd stop' command, this command now waits for 5 seconds longer than the exittimeout value before it kills the monetdbd daemon instead of only 30 seconds total (or until that daemon stops earlier). This gives the daemon enough time to terminate the mserver5 processes that it is managing. If exittimeout is negative, the daemon and the monetdbd process initiating the stop wait indefinitely until the mserver5 processes have stopped. Bug Fixes * 3336: DB files not removed if all rows are deleted, even after restart * 7104: Monetdbe NTILE function does not produce correct ordering * 7108: Monetdb crashes on query execution * 7109: MERGE Statement incorrectly reports that input relation matches multiple rows * 7110: Monetdb Query parsing consistency issues in the latest release (Remote Table)

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Announcement: New Oct2020-SP4 Bugfix release of MonetDB suite
by Sjoerd Mullender 12 Apr '21

12 Apr '21

The MonetDB team at MonetDB BV is pleased to announce the Oct2020-SP4 bugfix release of the MonetDB suite of programs. More information about MonetDB can be found on our website at <https://www.monetdb.org/>. For details on this release, please see the release notes at <https://www.monetdb.org/Downloads/ReleaseNotes>. As usual, the download location is <https://www.monetdb.org/downloads/>. Oct2020-SP4 Bugfix Release (11.39.15) ODBC Driver * When connecting using a DSN (Data Source Name), information about the data source is retrieved from the ODBC.INI file. Now we also get the location of the LOGFILE from this file. The logfile can be used to log all calls to the MonetDB ODBC driver to a file which can be used for debugging. * The ODBC driver now only passes on information about HUGEINT columns as HUGEINT when the application has indicated interest by querying about the SQL_HUGEINT extension type using the SQLGetTypeInfo function or by specifying the type in a call to SQLSetDescField. Otherwise the driver silently translates the HUGEINT type to BIGINT. This means that most application will see BIGINT columns when the server produced a HUGEINT column and only give an error if the value in the HUGEINT column didn't fit into a BIGINT. Bug Fixes * 6786: function json.isvalid(js json) is not useful, could be removed * 7016: Database crashes when use similarity function on a table with more than 200k records * 7037: Clearer err msg for ALTER USER with insufficient privileges * 7042: AddressSanitizer:DEADLYSIGNAL in Oct2020/gdk/gdk_tracer.c:494 * 7050: file descriptor leak when forward=redirect * 7057: ODBC driver installer on Windows is missing some DLLs * 7058: MonetDBe: COPY INTO csv file does not produce any output * 7059: MonetDBe: 'reverse' C UDF crashes * 7061: Have bulk load support combined gzip files * 7064: Temporary hashes created in hash and unique logic should try to use transient data farm first * 7066: percent_rank function with wrong results * 7070: double free error when running MonetDBe Example * 7076: mserver5 ignores memory.low from cgroups v2 * 7077: Oct2020: new default privileges not effectively communicated * 7083: MonetDBe C++ Compiling Error * 7085: Mitosis and filter functions * 7087: SIGSEGV caused by error in subquery's function being ignored by top-level query * 7089: Data consistency problem of query results in the latest release of Monetdb (Remote Table)

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Announcement: New Oct2020-SP3 Bugfix release of MonetDB suite
by Sjoerd Mullender 19 Feb '21

19 Feb '21

The MonetDB team at MonetDB BV is pleased to announce the Oct2020-SP3 bugfix release of the MonetDB suite of programs. More information about MonetDB can be found on our website at <https://www.monetdb.org/>. For details on this release, please see the release notes at <https://www.monetdb.org/Downloads/ReleaseNotes>. As usual, the download location is <https://www.monetdb.org/downloads/>. Oct2020-SP3 Bugfix Release (11.39.13) Bug Fixes * 7049: Implement DISTINCT for GROUP_CONCAT

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Announcement: New Oct2020-SP2 Bugfix release of MonetDB suite
by Sjoerd Mullender 25 Jan '21

25 Jan '21

The MonetDB team at MonetDB BV is pleased to announce the Oct2020-SP2 bugfix release of the MonetDB suite of programs. More information about MonetDB can be found on our website at <https://www.monetdb.org/>. For details on this release, please see the release notes at <https://www.monetdb.org/Downloads/ReleaseNotes>. As usual, the download location is <https://www.monetdb.org/downloads/>. Oct2020-SP2 Bugfix Release (11.39.11) SQL Frontend * CREATE [OR REPLACE] TRIGGER schema_name.trigger_name is now disallowed, because the trigger will be stored on the same schema as the table it refers to. Use a schema-qualified on the table reference (ie ON clause) when necessary. Bug Fixes * 6862: mserver5: crashes under update_table() when calling lib_sql.so ( max_clients = 2048) * 7002: monetdb stop fails * 7012: mclient enters an infinite loop when a file on the command line does not exist * 7013: Select * on grouped view: wrong error "cannot use non GROUP BY column 'a1' in query results without an aggregate function" * 7017: mal seems to leak in functions * 7020: release an older savepoint causes "BATproject2: does not match always" * 7021: savepoints crash mserver5 * 7022: transaction with an unreleased savepoint not properly persisted * 7023: CREATE VIEW: SELECT: cannot use non GROUP BY column '%1' in query results without an aggregate function * 7024: DELETE FROM or TRUNCATE on freshly created table leads to loosing all further inserts in same transaction * 7030: DROP TABLE with AUTO_INCREMENT doesn't drop sequence causing left-over dependency * 7034: User with sysadmin role cannot create another user * 7035: UPDATE and SELECT column privileges * 3772: Any user can grant a role.

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MonetDB bug tracker has moved to github
by Sjoerd Mullender 01 Dec '20

01 Dec '20

The MonetDB bug tracker has been moved from our self-hosted bugzilla instance to github issues. All bug IDs have remained the same in the transition, making referencing bugs easier. The new bug tracker can be found at https://github.com/MonetDB/MonetDB/issues Don't forget to follow this tracker (if you're interested in doing that) or follow individual bugs. Due to the way we had to do the move, the old stars that you may have given to the MonetDB github repo have been lost, so please, star it again (or for the first time) if you feel so inclined. The old bugzilla tracker will remain on-line for the time being but entry of new bugs has been turned off. Shortcuts to bugs are forwarded to github. (Shortcuts are URLs in the form of https://www.monetdb.org/bugzilla/<bugid> and https://bugs.monetdb.org/<bugid>.) -- Sjoerd Mullender

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MonetDB bug tracker is going to move
by Sjoerd Mullender 29 Nov '20

29 Nov '20

LS, The MonetDB team wishes to announce the end of our reliance on Bugzilla for bug tracking and enhancement requests. Instead, we switch over to the MonetDB Github issues repo (https://github.com/monetdb/monetdb) which is an hourly based mirror of the Mercurial repository managed at the development group. The move will take place on Friday, November 27, 2020. The actual transfer of the Bugzilla archive into the Github Issues may take a number of hours. A redirect will be in place to send people from Bugzilla towards the MonetDB GitHub repository instead. -- Sjoerd Mullender

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