Hi Ilya,
Yes, the code that you sent is working fine.
But can you please try the below code, by executing CREATE TABLE and ALTER
TABLE in separate programs. In this scenario, its not working.
public class ClientNode {
public static void main(String[] args) {
IgniteConfiguration igniteCfg = new IgniteConfiguration();
igniteCfg.setClientMode(true);
Ignite ignite = Ignition.start(igniteCfg);
IgniteCache foo = ignite.getOrCreateCache("foo");
foo.query(new SqlFieldsQuery("CREATE TABLE person (id INT PRIMARY KEY,
name VARCHAR, age INT);"));
foo.query(new SqlFieldsQuery("INSERT INTO person (id, name, age) VALUES
(1, 'Vassisualy', 45);"));
//foo.query(new SqlFieldsQuery("ALTER TABLE person DROP COLUMN
(age);"));
//System.err.println(foo.query(new SqlFieldsQuery("SELECT * FROM
person;")).getAll());
} }
public class ClientNode {
public static void main(String[] args) {
IgniteConfiguration igniteCfg = new IgniteConfiguration();
igniteCfg.setClientMode(true);
Ignite ignite = Ignition.start(igniteCfg);
IgniteCache foo = ignite.getOrCreateCache("foo");
//foo.query(new SqlFieldsQuery("CREATE TABLE person (id INT PRIMARY
KEY, name VARCHAR, age INT);"));
//foo.query(new SqlFieldsQuery("INSERT INTO person (id, name, age)
VALUES (1, 'Vassisualy', 45);"));
foo.query(new SqlFieldsQuery("ALTER TABLE person DROP COLUMN (age);"));
System.err.println(foo.query(new SqlFieldsQuery("SELECT * FROM
person;")).getAll())
} }
This second program is giving the following error:
Exception in thread "main" 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.extra.ClientNode.main(ClientNode.java:28)
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)
... 3 more
Caused by: java.lang.NullPointerException
at
org.apache.ignite.internal.processors.query.h2.CommandProcessor.runCommandH2(CommandProcessor.java:834)
... 15 more
Regards,
Shravya Nethula,
BigData Developer,
[cid:377ac046-a8f4-47d0-b6d7-74fce693a1d0]
Hyderabad.
________________________________
From: Ilya Kasnacheev <[email protected]>
Sent: Monday, September 21, 2020 3:04 PM
To: [email protected] <[email protected]>
Subject: Re: Issue in Alter Table - Drop Column functionality
Hello!
Sqlline can use both thin JDBC and thick JDBC driver. In this case it uses
thick JDBC driver.
Do you have a reproducer project to demonstrate the issue? I can't get it to
show up:
public class ClientNode {
public static void main(String[] args) {
IgniteConfiguration igniteCfg = new IgniteConfiguration();
igniteCfg.setClientMode(true);
Ignite ignite = Ignition.start(igniteCfg);
IgniteCache foo = ignite.getOrCreateCache("foo");
foo.query(new SqlFieldsQuery("CREATE TABLE person (id INT PRIMARY KEY,
name VARCHAR, age INT);"));
foo.query(new SqlFieldsQuery("INSERT INTO person (id, name, age) VALUES
(1, 'Vassisualy', 45);"));
foo.query(new SqlFieldsQuery("ALTER TABLE person DROP COLUMN (age);"));
System.err.println(foo.query(new SqlFieldsQuery("SELECT * FROM
person;")).getAll());
}
}
gives
[[1, Vassisualy]]
Regards,
--
Ilya Kasnacheev
пн, 21 сент. 2020 г. в 10:27, Shravya Nethula
<[email protected]<mailto:[email protected]>>:
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:174aff8c692ccd59d663]
Hyderabad.
________________________________
From: Ilya Kasnacheev
<[email protected]<mailto:[email protected]>>
Sent: Tuesday, September 15, 2020 3:07 PM
To: [email protected]<mailto:[email protected]>
<[email protected]<mailto:[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:174aff8c691fca9f7a62]
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:174aff8c690676f7b2e1]
Hyderabad.
