November 2011 - users-list

[MonetDB-users] Proofreading your professional documents
by Richard Hounslow 24 Feb '24

24 Feb '24

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2 2

[MonetDB-users] MonetDB JDBC 1.9 question
by Charalampos Nikolaou 23 Feb '12

23 Feb '12

Hi, I am getting some strange exceptions using MonetDB JDBC 1.8/1.9, and I decided to look into the code. While inspecting the code I came across these strange lines in MonetConnection.executeQuery(String[] templ, String query) method (http://dev.monetdb.org/hg/MonetDB/file/718da8ca0a1a/java/src/nl/cwi/monetdb…). In my case, these lines are executed for sure when doing a batch insert. So, suppose that the batch contains the following commands (as constructed by the MonetStatement.executeBatch() method): exec 1(1, 957339737330229055); exec 1(2, 278262503670654331); exec 1(805306369, 3763943296910752235) The lines in question take the above commands as a string, prepend a 's' character and append a ';' at the end. The resulting commands, which are written in the server's socket, are the following: sexec 1(1, 957339737330229055); exec 1(2, 278262503670654331); exec 1(805306369, 3763943296910752235); First of all, I am not familiar with the internals of JDBC drivers. Taking this into account, is this what it should be? From a symmetric point of view, I would assume that the correct would be the following: sexec 1(1, 957339737330229055); sexec 1(2, 278262503670654331); sexec 1(805306369, 3763943296910752235); That is, it should prepend a 's' character before an exec command. Last, are these exec commands (with or without a prepending 's') specific to MonetDB? In either case, is there any documentation to get familiar with their meaning? Thanks a lot, Babis

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[MonetDB-users] protocol violation: unexpected line in data block
by tangray 27 Dec '11

27 Dec '11

the whole log file : RD 1298855541531: read final block: 57 bytes RX 1298855541531: onxRWd3Yv:mserver:9:RIPEMD160,SHA256,SHA1,MD5:LIT:SHA512: RD 1298855541531: inserting prompt TD 1298855541531: write final block: 92 bytes TX 1298855541531: BIG:risk:{SHA256}01fa94fefcadb5918473e49aaa8e425538f8d40960b2d649348cb17c599031ae:sql:krisk: RD 1298855541546: read final block: 0 bytes RX 1298855541546: RD 1298855541546: inserting prompt TD 1298855541546: write final block: 48 bytes TX 1298855541546: sSET TIME ZONE INTERVAL '+08:00' HOUR TO MINUTE; RD 1298855541546: read final block: 0 bytes RX 1298855541546: RD 1298855541546: inserting prompt TD 1298855541546: write final block: 15 bytes TX 1298855541546: Xreply_size 250 RD 1298855541546: read final block: 0 bytes RX 1298855541546: RD 1298855541546: inserting prompt TD 1298855541546: write final block: 46 bytes TX 1298855541546: sSELECT "name", "value" FROM sys.env() as env; RD 1298855541546: read final block: 4246 bytes RX 1298855541546: &1 0 46 2 46 % .env, .env # table_name % name, value # name % varchar, varchar # type % 18, 203 # length [ "gdk_arch", "32biti686-pc-win32" ] [ "gdk_version", "1.40.3" ] [ "prefix", "D:\\Program Files\\MonetDB\\MonetDB5" ] [ "exec_prefix", "D:\\Program Files\\MonetDB\\MonetDB5" ] [ "gdk_dbname", "krisk" ] [ "gdk_dbfarm", "C:\\Documents and Settings\\swordtan\\Application Data\\MonetDB5\\dbfarm" ] [ "gdk_debug", "0" ] [ "gdk_alloc_map", "no" ] [ "gdk_vmtrim", "yes" ] [ "monet_admin", "adm" ] [ "monet_prompt", ">" ] [ "monet_welcome", "yes" ] [ "monet_mod_path", "D:\\Program Files\\MonetDB\\MonetDB5\\lib\\MonetDB5;D:\\Program Files\\MonetDB\\MonetDB5\\lib\\MonetDB5\\lib;D:\\Program Files\\MonetDB\\MonetDB5\\lib\\MonetDB5\\bin" ] [ "monet_daemon", "no" ] [ "host", "localhost" ] [ "mapi_port", "50000" ] [ "mapi_clients", "2" ] [ "mapi_open", "true" ] [ "mapi_autosense", "false" ] [ "default_pipe", "inline,remap,evaluate,costModel,coercions,emptySet,aliases,mitosis,mergetable,deadcode,commonTerms,joinPath,reorder,deadcode,reduce,dataflow,history,multiplex,garbageCollector" ] [ "minimal_pipe", "inline,remap,deadcode,multiplex,garbageCollector" ] [ "sql_optimizer", "default_pipe" ] [ "sql_debug", "0" ] [ "standoff_ns", "" ] [ "standoff_start", "start" ] [ "standoff_end", "end" ] [ "config", "D:\\Program Files\\MonetDB\\MonetDB5\\etc\\monetdb5.conf" ] [ "mero_pidfile", "D:\\Program Files\\MonetDB\\MonetDB5\\var\\run\\MonetDB\\merovingian.pid" ] [ "mero_controlport", "50001" ] [ "nov2009_pipe", "inline,remap,evaluate,costModel,coercions,emptySet,aliases,mergetable,deadcode,constants,commonTerms,joinPath,deadcode,reduce,dataflow,history,multiplex,garbageCollector" ] [ "replication_pipe", "inline,remap,evaluate,costModel,coercions,emptySet,aliases,mergetable,deadcode,constants,commonTerms,joinPath,deadcode,reduce,dataflow,history,replication,multiplex,garbageCollector" ] [ "accumulator_pipe", "inline,remap,evaluate,costModel,coercions,emptySet,aliases,mergetable,deadcode,constants,commonTerms,joinPath,deadcode,reduce,accumulators,dataflow,history,multiplex,garbageCollector" ] [ "recycler_pipe", "inline,remap,evaluate,costModel,coercions,emptySet,aliases,deadcode,constants,commonTerms,joinPath,deadcode,recycle,reduce,dataflow,history,multiplex,garbageCollector" ] [ "cracker_pipe", "inline,remap,evaluate,costModel,coercions,emptySet,aliases,selcrack,deadcode,constants,commonTerms,joinPath,deadcode,reduce,dataflow,history,multiplex,garbageCollector" ] [ "sidcrack_pipe", "inline,remap,evaluate,costModel,coercions,emptySet,aliases,sidcrack,deadcode,constants,commonTerms,joinPath,deadcode,reduce,dataflow,history,multiplex,garbageCollector" ] [ "datacell_pipe", "inline,remap,evaluate,costModel,coercions,emptySet,aliases,deadcode,constants,commonTerms,joinPath,datacell,deadcode,reduce,dataflow,history,multiplex,garbageCollector" ] [ "octopus_pipe", "inline,remap,evaluate,costModel,coercions,emptySet,aliases,mitosis,mergetable,deadcode,constants,commonTerms,joinPath,octopus,deadcode,reduce,dataflow,history,multiplex,garbageCollector" ] [ "mapreduce_pipe", "inline,remap,evaluate,costModel,coercions,emptySet,aliases,mapreduce,mergetable,deadcode,commonTerms,joinPath,reorder,deadcode,reduce,dataflow,history,multiplex,garbageCollector" ] [ "datacyclotron_pipe", "inline,remap,evaluate,costModel,coercions,emptySet,aliases,datacyclotron,mergetable,deadcode,constants,commonTerms,joinPath,reorder,deadcode,reduce,dataflow,history,replication,multiplex,garbageCollector" ] [ "derive_pipe", "inline,remap,evaluate,costModel,coercions,emptySet,aliases,mergetable,deadcode,constants,commonTerms,derivePath,joinPath,deadcode,reduce,dataflow,history,multiplex,garbageCollector" ] [ "dictionary_pipe", "inline,remap,dictionary,evaluate,costModel,coercions,emptySet,aliases,mergetable,deadcode,constants,commonTerms,joinPath,deadcode,reduce,dataflow,history,multiplex,garbageCollector" ] [ "compression_pipe", "inline,remap,evaluate,costModel,coercions,emptySet,aliases,mergetable,deadcode,constants,commonTerms,joinPath,deadcode,reduce,dataflow,compression,dataflow,history,multiplex,garbageCollector" ] [ "gdk_mem_pagebits", "16" ] [ "gdk_mem_bigsize", "1048576" ] [ "monet_pid", "984" ] [ "monet_version", "5.22.3" ] RD 1298855541546: inserting prompt TD 1298855541562: write final block: 60 bytes TX 1298855541562: sselect * from risk.td_ind_security_held where id = 1560000; RD 1298855541578: read final block: 1600 bytes RX 1298855541578: &1 1 1 30 1 % risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held # table_name % id, bizdate, painnercode, currency, exchange, seccode, basickind, unrealizedgainchange, unrealizedgain, margingain, interestgain, othergain, yieldrate, accrualinterest, allgain, fullmv, marketvalue, lastfullmv, lastmarketvalue, lastcost, cost, buysum, sellsum, realizedgain, holdingqty, lastholdingqty, mvweight, lastmvweight, fullmvweight, lastfullmvweight # name % int, varchar, varchar, varchar, varchar, varchar, varchar, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal # type % 7, 8, 8, 3, 5, 6, 3, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 14, 14, 14, 14 # length RD 1298855541578: inserting prompt TD 1298855762109: write final block: 60 bytes TX 1298855762109: sselect * from risk.td_ind_security_held where id = 1560000; RD 1298855762125: read final block: 1600 bytes RX 1298855762125: &1 2 1 30 1 % risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held # table_name % id, bizdate, painnercode, currency, exchange, seccode, basickind, unrealizedgainchange, unrealizedgain, margingain, interestgain, othergain, yieldrate, accrualinterest, allgain, fullmv, marketvalue, lastfullmv, lastmarketvalue, lastcost, cost, buysum, sellsum, realizedgain, holdingqty, lastholdingqty, mvweight, lastmvweight, fullmvweight, lastfullmvweight # name % int, varchar, varchar, varchar, varchar, varchar, varchar, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal, decimal # type % 7, 8, 8, 3, 5, 6, 3, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 14, 14, 14, 14 # length RD 1298855762125: inserting prompt TD 1298856279453: write final block: 69 bytes TX 1298856279453: sselect id,bizdate from risk.td_ind_security_held where id = 1560000; RD 1298856279453: read final block: 162 bytes RX 1298856279453: &1 3 1 2 1 % risk.td_ind_security_held, risk.td_ind_security_held # table_name % id, bizdate # name % int, varchar # type % 7, 8 # length [ 1560000, "20090702" ] RD 1298856279453: inserting prompt TD 1298856279468: write final block: 1797 bytes TX 1298856279468: sSELECT 'krisk' AS "TABLE_CAT", "schemas"."name" AS "TABLE_SCHEM", "tables"."name" AS "TABLE_NAME", "columns"."name" AS "COLUMN_NAME", cast(CASE "columns"."type" WHEN 'wrd' THEN -5 WHEN 'sec_interval' THEN -5 WHEN 'bigint' THEN -5 WHEN 'timetz' THEN 92 WHEN 'char' THEN 1 WHEN 'int' THEN 4 WHEN 'clob' THEN 2005 WHEN 'month_interval' THEN 4 WHEN 'tinyint' THEN -6 WHEN 'table' THEN 2003 WHEN 'date' THEN 91 WHEN 'double' THEN 8 WHEN 'decimal' THEN 3 WHEN 'timestamptz' THEN 93 WHEN 'timestamp' THEN 93 WHEN 'blob' THEN 2004 WHEN 'real' THEN 7 WHEN 'time' THEN 92 WHEN 'oid' THEN 1111 WHEN 'boolean' THEN 16 WHEN 'smallint' THEN 5 WHEN 'varchar' THEN 12 ELSE 1111 END AS smallint) AS "DATA_TYPE", "columns"."type" AS "TYPE_NAME", "columns"."type_digits" AS "COLUMN_SIZE", "columns"."type_scale" AS "DECIMAL_DIGITS", 0 AS "BUFFER_LENGTH", 10 AS "NUM_PREC_RADIX", cast(CASE "null" WHEN true THEN 1 WHEN false THEN 0 END AS int) AS "NULLABLE", cast(null AS varchar(1)) AS "REMARKS", "columns"."default" AS "COLUMN_DEF", 0 AS "SQL_DATA_TYPE", 0 AS "SQL_DATETIME_SUB", 0 AS "CHAR_OCTET_LENGTH", "columns"."number" + 1 AS "ORDINAL_POSITION", cast(null AS varchar(1)) AS "SCOPE_CATALOG", cast(null AS varchar(1)) AS "SCOPE_SCHEMA", cast(null AS varchar(1)) AS "SCOPE_TABLE", cast(1111 AS smallint) AS "SOURCE_DATA_TYPE", CASE "null" WHEN true THEN CAST ('YES' AS varchar(3)) WHEN false THEN CAST ('NO' AS varchar(3)) END AS "IS_NULLABLE" FROM "sys"."columns" AS "columns", "sys"."tables" AS "tables", "sys"."schemas" AS "schemas" WHERE "columns"."table_id" = "tables"."id" AND "tables"."schema_id" = "schemas"."id" AND LOWER("schemas"."name") LIKE 'risk' AND LOWER("tables"."name") LIKE 'td_ind_security_held' AND LOWER("columns"."name") LIKE 'id' ORDER BY "TABLE_SCHEM", "TABLE_NAME", "ORDINAL_POSITION"; RD 1298856279484: read final block: 853 bytes RX 1298856279484: &1 4 1 22 1 % ., sys.schemas, .tables, .columns, ., .columns, .columns, .columns, ., ., ., ., .columns, ., ., ., ., ., ., ., ., . # table_name % TABLE_CAT, TABLE_SCHEM, TABLE_NAME, COLUMN_NAME, DATA_TYPE, TYPE_NAME, COLUMN_SIZE, DECIMAL_DIGITS, BUFFER_LENGTH, NUM_PREC_RADIX, NULLABLE, REMARKS, COLUMN_DEF, SQL_DATA_TYPE, SQL_DATETIME_SUB, CHAR_OCTET_LENGTH, ORDINAL_POSITION, SCOPE_CATALOG, SCOPE_SCHEMA, SCOPE_TABLE, SOURCE_DATA_TYPE, IS_NULLABLE # name % char, varchar, varchar, varchar, smallint, varchar, int, int, tinyint, tinyint, int, varchar, varchar, tinyint, tinyint, tinyint, int, varchar, varchar, varchar, smallint, varchar # type % 5, 4, 20, 2, 1, 3, 2, 1, 1, 2, 1, 0, 0, 1, 1, 1, 1, 0, 0, 0, 4, 2 # length [ "krisk", "risk", "td_ind_security_held", "id", 4, "int", 32, 0, 0, 10, 0, NULL, NULL, 0, 0, 0, 1, NULL, NULL, NULL, 1111, "NO" ] RD 1298856279484: inserting prompt TD 1298856279500: write final block: 1802 bytes TX 1298856279500: sSELECT 'krisk' AS "TABLE_CAT", "schemas"."name" AS "TABLE_SCHEM", "tables"."name" AS "TABLE_NAME", "columns"."name" AS "COLUMN_NAME", cast(CASE "columns"."type" WHEN 'wrd' THEN -5 WHEN 'sec_interval' THEN -5 WHEN 'bigint' THEN -5 WHEN 'timetz' THEN 92 WHEN 'char' THEN 1 WHEN 'int' THEN 4 WHEN 'clob' THEN 2005 WHEN 'month_interval' THEN 4 WHEN 'tinyint' THEN -6 WHEN 'table' THEN 2003 WHEN 'date' THEN 91 WHEN 'double' THEN 8 WHEN 'decimal' THEN 3 WHEN 'timestamptz' THEN 93 WHEN 'timestamp' THEN 93 WHEN 'blob' THEN 2004 WHEN 'real' THEN 7 WHEN 'time' THEN 92 WHEN 'oid' THEN 1111 WHEN 'boolean' THEN 16 WHEN 'smallint' THEN 5 WHEN 'varchar' THEN 12 ELSE 1111 END AS smallint) AS "DATA_TYPE", "columns"."type" AS "TYPE_NAME", "columns"."type_digits" AS "COLUMN_SIZE", "columns"."type_scale" AS "DECIMAL_DIGITS", 0 AS "BUFFER_LENGTH", 10 AS "NUM_PREC_RADIX", cast(CASE "null" WHEN true THEN 1 WHEN false THEN 0 END AS int) AS "NULLABLE", cast(null AS varchar(1)) AS "REMARKS", "columns"."default" AS "COLUMN_DEF", 0 AS "SQL_DATA_TYPE", 0 AS "SQL_DATETIME_SUB", 0 AS "CHAR_OCTET_LENGTH", "columns"."number" + 1 AS "ORDINAL_POSITION", cast(null AS varchar(1)) AS "SCOPE_CATALOG", cast(null AS varchar(1)) AS "SCOPE_SCHEMA", cast(null AS varchar(1)) AS "SCOPE_TABLE", cast(1111 AS smallint) AS "SOURCE_DATA_TYPE", CASE "null" WHEN true THEN CAST ('YES' AS varchar(3)) WHEN false THEN CAST ('NO' AS varchar(3)) END AS "IS_NULLABLE" FROM "sys"."columns" AS "columns", "sys"."tables" AS "tables", "sys"."schemas" AS "schemas" WHERE "columns"."table_id" = "tables"."id" AND "tables"."schema_id" = "schemas"."id" AND LOWER("schemas"."name") LIKE 'risk' AND LOWER("tables"."name") LIKE 'td_ind_security_held' AND LOWER("columns"."name") LIKE 'bizdate' ORDER BY "TABLE_SCHEM", "TABLE_NAME", "ORDINAL_POSITION"; RD 1298856279515: read final block: 862 bytes RX 1298856279515: &1 5 1 22 1 % ., sys.schemas, .tables, .columns, ., .columns, .columns, .columns, ., ., ., ., .columns, ., ., ., ., ., ., ., ., . # table_name % TABLE_CAT, TABLE_SCHEM, TABLE_NAME, COLUMN_NAME, DATA_TYPE, TYPE_NAME, COLUMN_SIZE, DECIMAL_DIGITS, BUFFER_LENGTH, NUM_PREC_RADIX, NULLABLE, REMARKS, COLUMN_DEF, SQL_DATA_TYPE, SQL_DATETIME_SUB, CHAR_OCTET_LENGTH, ORDINAL_POSITION, SCOPE_CATALOG, SCOPE_SCHEMA, SCOPE_TABLE, SOURCE_DATA_TYPE, IS_NULLABLE # name % char, varchar, varchar, varchar, smallint, varchar, int, int, tinyint, tinyint, int, varchar, varchar, tinyint, tinyint, tinyint, int, varchar, varchar, varchar, smallint, varchar # type % 5, 4, 20, 7, 2, 7, 1, 1, 1, 2, 1, 0, 0, 1, 1, 1, 1, 0, 0, 0, 4, 2 # length [ "krisk", "risk", "td_ind_security_held", "bizdate", 12, "varchar", 8, 0, 0, 10, 0, NULL, NULL, 0, 0, 0, 2, NULL, NULL, NULL, 1111, "NO" ] RD 1298856279515: inserting prompt TD 1298856508906: write final block: 77 bytes TX 1298856508906: sselect id,bizdate,allgain from risk.td_ind_security_held where id = 1560000; RD 1298856508906: read final block: 187 bytes RX 1298856508906: &1 6 1 3 1 % risk.td_ind_security_held, risk.td_ind_security_held, risk.td_ind_security_held # table_name % id, bizdate, allgain # name % int, varchar, decimal # type % 7, 8, 20 # length RD 1298856508906: inserting prompt

2 1

[MonetDB-users] java.lang.AssertionError: block 0 should have been fetched by now
by Viktor Rosenfeld 27 Dec '11

27 Dec '11

Hi, I get an error message when I retrieve a MAL plan over JDBC after the 250th call to ResultSet.next(). The relevant part of the stack trace is: java.lang.AssertionError: block 0 should have been fetched by now :( at nl.cwi.monetdb.jdbc.MonetConnection$ResultSetResponse.getLine(MonetConnection.java:1585) at nl.cwi.monetdb.jdbc.MonetResultSet.absolute(MonetResultSet.java:194) at nl.cwi.monetdb.jdbc.MonetResultSet.relative(MonetResultSet.java:2149) at nl.cwi.monetdb.jdbc.MonetResultSet.next(MonetResultSet.java:2116) The call to EXPLAIN works in mclient and returns a MAL plan that is 402 lines long. I can reproduce the error when I try to create the plan via jdbcclient, except that it says that block 1 should have been fetched and the exporter stops after line 160 or so. However, other SQL queries that also produce more than 250 results work over JDBC. Not sure what the difference is, but these queries only return column of integers. I'm using the Aug2011-SP3 release on OS X 10.6.8. Please let me know if I should provide other information like the SQL query or the MAL plan. Cheers, Viktor

2 3

[MonetDB-users] JDBC documentation inconsistencies
by Viktor Rosenfeld 29 Nov '11

29 Nov '11

Hi, the example at the top of the documentation of the JDBC client at http://www.monetdb.org/Documentation/Cookbooks/SQLrecipies/Clients/JDBC uses the -d switch to specify the table and the -b switch to specify the database. However the current version does not recognize the -b switch and the -d switch can be used to select the database as is documented further on the page. Also, the page says that TRACE is not possible via JDBC. However, as the jdbcclient.jar demonstrates it is indeed possible to use TRACE on a query by checking additional result sets. Cheers, Viktor

2 4

[MonetDB-users] Announcement: New Aug2011-SP3 Bugfix release of MonetDB suite
by Fabian Groffen 22 Nov '11

22 Nov '11

The MonetDB team at CWI/MonetDB BV is pleased to announce the Aug2011-SP3 bugfix 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/>. Note that this is the last release of the Aug2011 branch. From now on, no further development will take place on this branch. Aug 2011-SP3 bugfix release SQL * Added a fix for bug #2834, which caused weird (failing) behaviour with PreparedStatements. Merovingian * Fixed a bug where monetdbd's socket files from /tmp were removed when a second monetdbd was attempted to be started using the same port. Bug Fixes * 2875: incomplete database initialization * 2912: Function body disappears after loading data - error message: SQLException:sql.resultSet:Cannot access descriptor * 2919: Add column and select in same transaction * 2920: Updated database from Aug2011 to Dec2011 make queries fail with "Subquery result missing". * 2921: complex where clause broken * 2923: Multiplication and cast from decimal to integer leads to 0 value * 2924: use LIKE with ESCAPE ignores OR operator * 2928: Cannot update a field with a count query based on an other table

1 0

[MonetDB-users] Workflow for independent, read only, discretely updated tables.
by Hedge Hog 20 Nov '11

20 Nov '11

Hi, I'm evaluating MonetDB, and the following is based on reading the docs and some of the monetdb-users email list archive. I wonder if the following setup+workflow is correct, and if so, is it monetdb best practice, given this use case: We will have read only tables, each distributed across several machines/servers, they will be updated daily. There will be no cross table queries, i.e. only one table touched by each quert. We would like to be able to update each table while not affecting the availability of any other table. The table_db's are not horizontally sharded, i.e. all the data for a query will always come from that one table. We cannot use udp multicast/broadcast so a monetdb cluster is not possible (unless a localhost cluster is possible/sensible?). The setup+workflow: - one table per database (this allows for independent table updates), let these be <table_db>. - update a master (writable) instance of the table on a 'special' monetdbd/machine. - copy the updated table to each machine. - To update the table on a machine: $> monetbd lock <mytable_db> $> monetbd stop <mytable_db> $> mclient -u monetdb <mytable_db> updatefile $> cat updatefile copy into MyTable from ('path_to_mytable_col_file_i', 'path_to_mytable_col_file_f', 'path_to_mytable_col_file_s'); $> monetbd release <mytable_db> $> monetbd start <mytable_db> Is the above the best pattern/architecture of monetdb for such a use case? Appreciate any insights people can offer TIA Hedge -- πόλλ' οἶδ ἀλώπηξ, ἀλλ' ἐχῖνος ἓν μέγα [The fox knows many things, but the hedgehog knows one big thing.] Archilochus, Greek poet (c. 680 BC – c. 645 BC) http://hedgehogshiatus.com

3 4

[MonetDB-users] Unable to use Tableau
by Sékine Coulibaly 18 Nov '11

18 Nov '11

Hi there, I'm a new user to both Tableau and MonetDb. I run under Windows, and my MonetDb base is up and running, a table "matable" was created and populated. Although I can connect the MonetDb base to Tableau (although I get some warnings), as soon as Tableau sends a request to MonetDb, the ODBC driver returns the following : « Database error (0x80004005) : [MonetDB][ODBC Driver 11.5.7]Invalid identifier 'none:name:nk' » As can be seen here : http://puu.sh/8STw Has any of you already used Tableau and solved this issue ? Shall I consider using Pentaho ? Thank you ! Regards

2 1

[MonetDB-users] pcre not found when configure monetdb5
by xldelg＠sohu.com 18 Nov '11

18 Nov '11

hi, I tried to compile the latest monetdb(11.5.3) on centos6 x64, but the pcre library is not found when configure. I'm sure that the pcre library has been installed via compiling the source, the libpcre.la, libpcre.a, libpcre.so has been installed in /usr/local/lib. I also configure monetdb like: pcre_LIBS=/usr/local/lib pcre_CFLAGS=/usr/local/include ./configure, but it doesn't work. How to fix this problem? Any reply will be apprecitated.    

2 2

[MonetDB-users] "TypeException: algebra.join undefined" when evaluating EXISTS (SELECT ...) predicate
by Viktor Rosenfeld 16 Nov '11

16 Nov '11

Hi, I get an error message when executing the following query: SELECT count(*) FROM _rank AS _rank1, _rank AS _rank2 WHERE _rank1.pre = 23 AND _rank2.pre = 33 AND EXISTS (SELECT 1 FROM _rank AS ancestor WHERE ancestor.pre < _rank1.pre AND _rank1.pre < ancestor.post AND ancestor.pre < _rank2.pre AND _rank2.pre < ancestor.post); The error message is: TypeException:user.s0_1[99]:'algebra.join' undefined in: _129:any := algebra.join(_128:bat[:oid,:oid], _108:bat[:int,:oid]) SQLException:SQLengine:Program contains errors A minimal example of test data to run this query follows: CREATE TABLE _rank (pre INTEGER, post INTEGER); INSERT INTO _rank VALUES (22, 37); INSERT INTO _rank VALUES (23, 24); INSERT INTO _rank VALUES (33, 34); Cheers, Viktor

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