Hi Ilya, sqlLine is also a thin client if I am not wrong! >From thin clients like GridGain and sqlLine, its working as expected.
It is not working from thick client. When I try to execute the same query as a thick client with following Java code, its throwing IgniteSQLException. Java Code: String sql = "ALTER TABLE person DROP COLUMN (age)"; FieldsQueryCursor cursor = cache.query(new SqlFieldsQuery(sql)); Regards, Shravya Nethula, BigData Developer, [cid:b616dee9-4b10-4059-a473-8cc8c4fc7342] Hyderabad. ________________________________ From: Ilya Kasnacheev <[email protected]> Sent: Tuesday, September 15, 2020 3:07 PM To: [email protected] <[email protected]> Subject: Re: Issue in Alter Table - Drop Column functionality Hello! I have just validated it on 2.8.1. Seems to work! ~/Downloads/apache-ignite-2.8.1-bin% bin/sqlline.sh sqlline version 1.3.0 sqlline> !connect jdbc:ignite:cfg://config/default-config.xml [12:33:33] __________ ________________ [12:33:33] / _/ ___/ |/ / _/_ __/ __/ [12:33:33] _/ // (7 7 // / / / / _/ [12:33:33] /___/\___/_/|_/___/ /_/ /___/ [12:33:33] [12:33:33] ver. 2.8.1#20200521-sha1:86422096 [12:33:33] 2020 Copyright(C) Apache Software Foundation [12:33:33] [12:33:38] Topology snapshot [ver=2, locNode=16da55e5, servers=1, clients=1, state=ACTIVE, CPUs=4, offheap=3.1GB, heap=6.8GB] [12:33:38] ^-- Baseline [id=0, size=1, online=1, offline=0] Error: Transactions are not supported. (state=,code=0) 0: jdbc:ignite:cfg://config/default-config.xm> CREATE TABLE person (id INT PRIMARY KEY, name VARCHAR, age INT); 0: jdbc:ignite:cfg://config/default-config.xm> INSERT INTO person (id, name, age) VALUES (1, 'Vassisualy', 45); 0: jdbc:ignite:cfg://config/default-config.xm> ALTER TABLE person DROP COLUMN age; 0: jdbc:ignite:cfg://config/default-config.xm> SELECT * FROM person; +--------------------------------+--------------------------------+ | ID | NAME | +--------------------------------+--------------------------------+ | 1 | Vassisualy | +--------------------------------+--------------------------------+ 1 row selected (0,059 seconds) Do you have steps to reproduce? Regards, -- Ilya Kasnacheev чт, 3 сент. 2020 г. в 20:46, Shravya Nethula <[email protected]<mailto:[email protected]>>: Hi, I have tried "ALTER TABLE PUBLIC.person DROP COLUMN (age)" query as well. I am getting the same error message. Regards, Shravya Nethula, BigData Developer, [cid:174911e79b1fca9f7a62] Hyderabad. ________________________________ From: Denis Mekhanikov <[email protected]<mailto:[email protected]>> Sent: Thursday, September 3, 2020 2:17 PM To: user <[email protected]<mailto:[email protected]>> Subject: Re: Issue in Alter Table - Drop Column functionality I mean, DROP COLUMN, not DROP TABLE. Denis чт, 3 сент. 2020 г. в 11:46, Denis Mekhanikov <[email protected]<mailto:[email protected]>>: Does the DROP TABLE statement work if you specify the schema name explicitly? For example, if the table is in the PUBLIC schema, try running the following query: ALTER TABLE PUBLIC.person DROP COLUMN (age) Denis ср, 2 сент. 2020 г. в 20:27, Shravya Nethula <[email protected]<mailto:[email protected]>>: Hi, When I am trying the following query from GridGain, it works as expected. ALTER TABLE person DROP COLUMN (age) But when I try to execute the same query as a thick client with following Java code, its throwing IgniteSQLException. Java Code: String sql = "ALTER TABLE person DROP COLUMN (age)"; FieldsQueryCursor cursor = cache.query(new SqlFieldsQuery(sql)); Output: javax.cache.CacheException at org.apache.ignite.internal.processors.cache.IgniteCacheProxyImpl.query(IgniteCacheProxyImpl.java:817) at org.apache.ignite.internal.processors.cache.IgniteCacheProxyImpl.query(IgniteCacheProxyImpl.java:750) at org.apache.ignite.internal.processors.cache.GatewayProtectedCacheProxy.query(GatewayProtectedCacheProxy.java:424) at net.aline.cloudedh.base.database.IgniteTable._alterTable(IgniteTable.java:138) at net.aline.cloudedh.base.database.BigTable.alter(BigTable.java:697) at net.aline.cloudedh.base.framework.DACEngine.alterTable(DACEngine.java:1015) at net.aline.cloudedh.base.framework.DACOperationsTest.main(DACOperationsTest.java:89) Caused by: class org.apache.ignite.internal.processors.query.IgniteSQLException: null at org.apache.ignite.internal.processors.query.h2.CommandProcessor.runCommandH2(CommandProcessor.java:888) at org.apache.ignite.internal.processors.query.h2.CommandProcessor.runCommand(CommandProcessor.java:418) at org.apache.ignite.internal.processors.query.h2.IgniteH2Indexing.executeCommand(IgniteH2Indexing.java:1048) at org.apache.ignite.internal.processors.query.h2.IgniteH2Indexing.querySqlFields(IgniteH2Indexing.java:1130) at org.apache.ignite.internal.processors.query.GridQueryProcessor$3.applyx(GridQueryProcessor.java:2406) at org.apache.ignite.internal.processors.query.GridQueryProcessor$3.applyx(GridQueryProcessor.java:2402) at org.apache.ignite.internal.util.lang.IgniteOutClosureX.apply(IgniteOutClosureX.java:36) at org.apache.ignite.internal.processors.query.GridQueryProcessor.executeQuery(GridQueryProcessor.java:2919) at org.apache.ignite.internal.processors.query.GridQueryProcessor.lambda$querySqlFields$1(GridQueryProcessor.java:2422) at org.apache.ignite.internal.processors.query.GridQueryProcessor.executeQuerySafe(GridQueryProcessor.java:2460) at org.apache.ignite.internal.processors.query.GridQueryProcessor.querySqlFields(GridQueryProcessor.java:2396) at org.apache.ignite.internal.processors.query.GridQueryProcessor.querySqlFields(GridQueryProcessor.java:2323) at org.apache.ignite.internal.processors.cache.IgniteCacheProxyImpl.query(IgniteCacheProxyImpl.java:802) ... 6 more Caused by: java.lang.NullPointerException at org.apache.ignite.internal.processors.query.h2.CommandProcessor.runCommandH2(CommandProcessor.java:834) ... 18 more On the other hand, ALTER TABLE ADD COLUMN functionality is working in both GridGain and also through thick client Java code. Why is it so? Is there any parameter or configurations that are missing? Please kindly let me know if you need any more details regarding the failure scenario. Regards, Shravya Nethula, BigData Developer, [cid:174911e79b0676f7b2e1] Hyderabad.
