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December 2016

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Announcement: New Dec2016 Feature release of MonetDB suite
by Panagiotis Koutsourakis 21 Dec '16

21 Dec '16

The MonetDB team at CWI/MonetDB BV is pleased to announce the Dec2016 feature release of the MonetDB suite of programs. More information about MonetDB can be found on our website at <http://www.monetdb.org/>. For details on this release, please see the release notes at <http://www.monetdb.org/Downloads/ReleaseNotes>. As usual, the download location is <http://dev.monetdb.org/downloads/>. Dec 2016 feature release MonetDB5 Server * Removed the zorder module with functions zorder.encode, zorder.decode_x and zorder.decode_y. * Removed command bbp.getHeat(). * Removed bat.setColumn with two arguments and bat.setRole. Use bat.setColumn with one argument instead. * Removed function BKCappend_reverse_val_wrap: it was unused. * The "wrd" type has been removed from GDK and MAL. The type was defined to be a 32 bit integer on 32 bit architectures and a 64 bit integer on 64 bit architectures. We now generally use "lng" (always 64 bits) where "wrd" was used. * Keep a collection of full traces. Each time the SQL user applies the TRACE option, the full json trace is retained within the <dbpath>/<dbname>/sql_traces Build Environment * New packages MonetDB-python2 (Fedora) and monetdb-python2 (Debian/Ubuntu) have been created for Python 2 integration into MonetDB. * With OID size equal to ABI/word size, mserver5 does not need to print the OID size, anymore. * Removed obsolete code associated with long gone static linking option. * Removed configure option --enable-oid32 to compile with 32 bit OIDs on a 64 bit architecture. . * The Perl, PHP, and Python clients, and the JDBC driver each now have their own repositories and release cycles. The Python client is maintained by Gijs Molenaar on Github (https://github.com/gijzelaerr/pymonetdb), the other clients are maintained by CWI/MonetDB on our own server (https://dev.monetdb.org/hg/monetdb-java, https://dev.monetdb.org/hg/monetdb-perl, https://dev.monetdb.org/hg/monetdb-php). MonetDB Common * The tnokey values must now be 0 if it is not known whether all values in a column are distinct. * The 2-bit tkey field in the bat descriptor has been split into two single bit fields: tkey and tunique. The old tkey&BOUND2BTRUE value is now stored in tunique. * Implemented conversion to str from any type (not just the internal types). * VALcopy and VALinit both return their first argument on success or (and that's new) NULL on (allocation) failure. * BATattach now can also create a str BAT from a file consisting of null-terminated strings. The input file must be encoded using UTF-8. * BATattach now copies the input file instead of "stealing" it. * Removed the lastused "timestamp" from the BBP. * Removed batStamp field from BAT descriptor, and removed the BBPcurstamp function. * Removed unused functions BBPhot and BBPcold. * Removed BATderiveTailProps and BATderiveProps. Just set the properties you know about, or use BATsettrivprop. * Removed the macro BUNfirst. It can be replaced by 0. * Changed BATroles by removing the argument to set the name of the head column. * The head column is now completely gone. MonetDB is completely "headless". * The format of the BBP.dir file was simplified. Since the head column is VOID, the only value that needs to be stored is the head seqbase. * BATs now only have a single (logical) name. * The function BATmirror is gone. The HEAD column is always VOID (with a non-nil seqbase) and the TAIL column carries the data. All functions that deal with data work on the TAIL column. * BATkey now works on the TAIL column instead of the HEAD column. * Replaced BATseqbase with BAThseqbase and BATtseqbase, the former for setting the seqbase on the HEAD, the latter for setting the seqbase on the TAIL. * Replaced function BATnew with COLnew with slightly different arguments: the first argument of COLnew is the SEQBASE of the head column (which is always VOID). * The "wrd" type has been removed from GDK and MAL. The type was defined to be a 32 bit integer on 32 bit architectures and a 64 bit integer on 64 bit architectures. We now generally use "lng" (always 64 bits) where "wrd" was used. SQL * Removed functions sys.zorder_encode, sys.zorder_decode_x, and sys.zorder_decode_y. * The experimental recycler code is moved to the attic. * The syntax of bat.new(:oid,:any) has been changed by dropping the superflous :oid. All BATs are now binary associations between a void column and a materialized value column. (except for the internal :bat[:void,:void] representation of simple oid ranged tails.) Bug Fixes * 3357: Implement setQueryTimeout() * 3445: Add support for database name to dotmonetdb file * 3597: SQL to MAL listing looses types * 3973: JDBC hangs * 3976: Performance enhancement to LIKE without wildcards * 4005: Correlated update causes incorrect null constraint violation * 4016: merge table only optimises for point query * 4040: sys.storage call can take a long time * 4047: Segfault when updating a dropped table * 4050: Database corruption when running low on inode * 4057: missing bulk operations between constant and bat * 4061: SIGSEGV in candscan_lng * 4066: Deadlocked monetdbd * 6068: Error message about incompatible BBP version should be clearer * 6069: query with union all silently crashes * 6070: setting negative session query timeout should not be possible/allowed * 6071: where clause with cast and floor fails to sigsegv * 6072: Bind to UPD delta column does not get/show type information in EXPLAIN * 6073: Missing type information for constants in MAL explain * 6074: SET ROLE command does not work * 6075: gdk_calc.c:13113: BATcalcifthenelse_intern: Assertion `col2 != NULL' failed. * 6076: rel_optimizer.c:5426: rel_push_project_up: Assertion `e' failed. * 6077: mserver5: rel_optimizer.c:5444: rel_push_project_up: Assertion `e' failed. * 6078: rel_bin.c:2402: rel2bin_project: Assertion `0' failed. * 6084: Merge table point to wrong columns if columns in partition tables are deleted * 6108: monetdb5-sql sysv init script does not wait for shutdown * 6114: segfault raised in the query rewriter due to a null pointer * 6115: Assertion hit in the codegen * 6116: Codegen does not support certain kind of selects on scalar subqueries * 6117: Assertion hit in the query rewriting stage during the push down phase * 6118: SIGSEGV in strPut due to shared heap * 6119: Assertion hit in the MAL optimiser on a complex query * 6120: QUANTILE() treats NULL as if it is zero * 6121: SELECT a.col IN ( b.col FROM b ) FROM a statements with no error but no result * 6123: Assertion hit in the codegen #2 * 6124: CASE <column> WHEN NULL THEN 0 ELSE 1 END returns wrong result * 6125: Stack overflow in the query rewriter with a query having an OR condition and a nested SELECT subexpression * 6126: batcalc.== can't handle void BATs * 6139: Debian libmonetdb13 conflicts with libmonetdb5-server-geom

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