Sorry for a vague answer, my bad. As I understand, you are trying to collect a tree based on fields typeId and pTypeId. This can be achieved by iteratively collecting objects from cache by typeId field. You can do this by making typeId a key of a cache or by building an SQL index and selecting objects with simple SELECT statements. Multiple gets from cache won't cause any performance impact, comparing to "WITH RECURSIVE" construct, as SQL would do the same thing internally.
Also if you actually have a forest of little trees, all nodes that have the same root may be placed on the same partition using an affinity key. Trees may be thus collected using affinity run. More on this: https://apacheignite.readme.io/docs/affinity-collocation. Alternatively, cache with information about types may be configured as replicated, so all nodes will have a local copy of this cache, but it will involve some overhead for put/update operations. These hints should help you optimize performance. Denis ср, 27 сент. 2017 г. в 0:51, Denis Magda <dma...@apache.org>: > Denis Mek., > > How do you suggest executing the same query without SQL? Please be > specific if you advise discontinuing the SQL for the use case. > > > Alex P., Vladimir, > > What’s the main reason of WITH RECURSIVE removal? Why it worked before and > broken now? > https://issues.apache.org/jira/browse/IGNITE-5289 > > — > Denis > > On Sep 25, 2017, at 12:31 AM, Denis Mekhanikov <dmekhani...@gmail.com> > wrote: > > Yes, you are right about that, but Ignite has no intention to support this > syntax, it worked in 1.9 by chance. > Here, I found a ticket to explicitly forbid it: > https://issues.apache.org/jira/browse/IGNITE-5289 > > So, it's better to use cache directly without SQL in your case. > > Denis > > пн, 25 сент. 2017 г. в 4:11, 贺波 <hebo...@163.com>: > >> Hi! >> I have executed the recursive sql statement on H2 database,it >> executes correctly.But it executes error since version 2.0.0.So >> <http://2.0.0.so/> I think it's a bug of Ingite,not H2.My test demo is >> in the attachment. >> >> >> >> >> >> >> At 2017-09-23 00:20:12, "Denis Mekhanikov" <dmekhani...@gmail.com> wrote: >> >> Hi! >> >> Internally Ignite uses H2 to process SQL queries. Recursive queries is an >> experimental feature of H2, so I wouldn't recommend you to use it in >> production for now. >> Ignite 2.0 and 2.1 don't seem to support this kind of queries, so the >> best option for you is to modify your query if possible to avoid recursive >> constructs, or retrieve data from cache directly, without use of SQL. >> >> Denis >> >> пт, 22 сент. 2017 г. в 12:37, 贺波 <hebo...@163.com>: >> >>> Hi,I used Apache Ignite in my project for more than a year,from version >>> 1.8.0 to 2.2.0.I use Ignite In-Menory Sql Grid in my project.I use “with >>> as” sql function in my sql,it executes correctly in version 1.9.0,but >>> executes error since version 2.0.0.My <http://2.0.0.my/> sql >>> statement is: >>> *with* RECURSIVE children(typeId, pTypeId)* AS* ( >>> SELECT typeId, pTypeId FROM ProcessDefTypePo WHERE pTypeId = '1' >>> UNION ALL >>> SELECT ProcessDefTypePo.typeId, ProcessDefTypePo.pTypeId FROM children >>> INNER JOIN ProcessDefTypePo ON children.typeId =ProcessDefTypePo.pTypeId >>> ) >>> select t1.typeId,t1.pTypeId,t1.typeName,t1.description, >>> t2.typeName as pTypeName from ProcessDefTypePo t1 left join >>> ProcessDefTypePo t2 on t1.pTypeId=t2.typeId where t1.typeId not in ( select >>> typeId from children ) >>> >>> The execution error in version 2.2.0 is: >>> Caused by: class org.apache.ignite.IgniteCheckedException: Unknown query >>> type: null >>> at >>> org.apache.ignite.internal.processors.query.GridQueryProcessor.executeQuery(GridQueryProcessor.java:2316) >>> at >>> org.apache.ignite.internal.processors.query.GridQueryProcessor.querySqlFields(GridQueryProcessor.java:1820) >>> ... 165 more >>> Caused by: java.lang.UnsupportedOperationException: Unknown query type: >>> null >>> at >>> org.apache.ignite.internal.processors.query.h2.sql.GridSqlQueryParser.parseQuery(GridSqlQueryParser.java:1225) >>> at >>> org.apache.ignite.internal.processors.query.h2.sql.GridSqlQueryParser.parseTable(GridSqlQueryParser.java:501) >>> at >>> org.apache.ignite.internal.processors.query.h2.sql.GridSqlQueryParser.parseTableFilter(GridSqlQueryParser.java:465) >>> at >>> org.apache.ignite.internal.processors.query.h2.sql.GridSqlQueryParser.parseSelect(GridSqlQueryParser.java:565) >>> at >>> org.apache.ignite.internal.processors.query.h2.sql.GridSqlQueryParser.parseQuery(GridSqlQueryParser.java:1220) >>> at >>> org.apache.ignite.internal.processors.query.h2.sql.GridSqlQueryParser.parseQueryExpression(GridSqlQueryParser.java:452) >>> at >>> org.apache.ignite.internal.processors.query.h2.sql.GridSqlQueryParser.parseExpression0(GridSqlQueryParser.java:1436) >>> at >>> org.apache.ignite.internal.processors.query.h2.sql.GridSqlQueryParser.parseExpression(GridSqlQueryParser.java:1267) >>> at >>> org.apache.ignite.internal.processors.query.h2.sql.GridSqlQueryParser.parseExpression0(GridSqlQueryParser.java:1378) >>> at >>> org.apache.ignite.internal.processors.query.h2.sql.GridSqlQueryParser.parseExpression(GridSqlQueryParser.java:1267) >>> at >>> org.apache.ignite.internal.processors.query.h2.sql.GridSqlQueryParser.parseSelect(GridSqlQueryParser.java:536) >>> at >>> org.apache.ignite.internal.processors.query.h2.sql.GridSqlQueryParser.parseQuery(GridSqlQueryParser.java:1220) >>> at >>> org.apache.ignite.internal.processors.query.h2.sql.GridSqlQueryParser.parse(GridSqlQueryParser.java:1181) >>> at >>> org.apache.ignite.internal.processors.query.h2.sql.GridSqlQuerySplitter.parse(GridSqlQuerySplitter.java:1604) >>> at >>> org.apache.ignite.internal.processors.query.h2.sql.GridSqlQuerySplitter.split(GridSqlQuerySplitter.java:197) >>> at >>> org.apache.ignite.internal.processors.query.h2.IgniteH2Indexing.queryDistributedSqlFields(IgniteH2Indexing.java:1307) >>> at >>> org.apache.ignite.internal.processors.query.GridQueryProcessor$5.applyx(GridQueryProcessor.java:1815) >>> at >>> org.apache.ignite.internal.processors.query.GridQueryProcessor$5.applyx(GridQueryProcessor.java:1813) >>> at >>> org.apache.ignite.internal.util.lang.IgniteOutClosureX.apply(IgniteOutClosureX.java:36) >>> at >>> org.apache.ignite.internal.processors.query.GridQueryProcessor.executeQuery(GridQueryProcessor.java:2293) >>> >>> Can you help me with this problem?Thanks. >>> >>> >>> >>> >>> >>> >>> >>> >> >> >> 【网易自营】好吃到爆！鲜香弹滑加热即食，经典13香/麻辣小龙虾仅75元3斤>> >> <http://you.163.com/item/detail?id=1183001&from=web_gg_mail_jiaobiao_7> >> >> > >
