As a general statement, the protobuf serialization is much better
maintained and comes with a degree of backwards compatibility (which the
JSON serialization guarantees none).
Thanks for sharing the solution.
On 4/20/18 9:53 AM, Lu Wei wrote:
I did some digging, and the reason is because I started PQS using
JSON serialization, rather than PROTOBUF.
When I switch to PROTOBUF serialization, the 'select * from
testarray' query works fine.
There is not type for numbers in Json, so an Json Array[100] is parsed
to an array containing an integer value. when getting items from the Sql
result set, there is an convert from 100 (an integer) to long (type
defined in table), so a conversion exception happened.
I guess we should better use Protobuf rather than Json as serialization
for PQS.
------------------------------------------------------------------------
*From:* sergey.solda...@gmail.com <sergey.solda...@gmail.com> on behalf
of Sergey Soldatov <sergeysolda...@gmail.com>
*Sent:* Friday, April 20, 2018 5:22:47 AM
*To:* user@phoenix.apache.org
*Subject:* Re: 答复: phoenix query server java.lang.ClassCastException
for BIGINT ARRAY column
Definitely, someone who is maintaining CDH branch should take a look. I
don't observer that behavior on the master branch:
0: jdbc:phoenix:thin:url=http://localhost:876> create table if not
exists testarray(id bigint not null, events bigint array constraint pk
primary key (id));
No rows affected (2.4 seconds)
0: jdbc:phoenix:thin:url=http://localhost:876> upsert into testarray
values (1, array[1,2]);
1 row affected (0.056 seconds)
0: jdbc:phoenix:thin:url=http://localhost:876> select * from testarray;
+-----+---------+
| ID | EVENTS |
+-----+---------+
| 1 | [1, 2] |
+-----+---------+
1 row selected (0.068 seconds)
0: jdbc:phoenix:thin:url=http://localhost:876>
Thanks,
Sergey
On Thu, Apr 19, 2018 at 12:57 PM, Lu Wei <wey...@outlook.com
<mailto:wey...@outlook.com>> wrote:
by the way, all the queries are shot in sqlline-thin.py
------------------------------------------------------------------------
*发件人:* Lu Wei
*发送时间:* 2018年4月19日 6:51:15
*收件人:* user@phoenix.apache.org <mailto:user@phoenix.apache.org>
*主题:* 答复: phoenix query server java.lang.ClassCastException for
BIGINT ARRAY column
## Version:
phoenix: 4.13.2-cdh5.11.2
hive: 1.1.0-cdh5.11.2
to reproduce:
-- create table
create table if not exists testarray(id bigint not null, events
bigint array constraint pk primary key (id))
-- upsert data:
upsert into testarray values (1, array[1,2]);
-- query:
select id from testarray; -- fine
select * from testarray; -- error
------------------------------------------------------------------------
*发件人:* sergey.solda...@gmail.com
<mailto:sergey.solda...@gmail.com> <sergey.solda...@gmail.com
<mailto:sergey.solda...@gmail.com>> 代表 Sergey Soldatov
<sergeysolda...@gmail.com <mailto:sergeysolda...@gmail.com>>
*发送时间:* 2018年4月19日 6:37:06
*收件人:* user@phoenix.apache.org <mailto:user@phoenix.apache.org>
*主题:* Re: phoenix query server java.lang.ClassCastException for
BIGINT ARRAY column
Could you please be more specific? Which version of phoenix are you
using? Do you have a small script to reproduce? At first glance it
looks like a PQS bug.
Thanks,
Sergey
On Thu, Apr 19, 2018 at 8:17 AM, Lu Wei <wey...@outlook.com
<mailto:wey...@outlook.com>> wrote:
Hi there,
I have a phoenix table containing an BIGINT ARRAY column. But
when querying query server (through sqlline-thin.py), there is
an exception:
java.lang.ClassCastException: java.lang.Integer cannot be cast
to java.lang.Long
BTW, when query through sqlline.py, everything works fine. And
data in HBase table are of Long type, so why does the Integer to
Long cast happen?
## Table schema:
create table if not exists gis_tracking3(tracking_object_id
bigint not null, lat double, lon double, speed double, bearing
double, time timestamp not null, events bigint array constraint
pk primary key (tracking_object_id, time))
## when query events[1], it works fine:
0: jdbc:phoenix:thin:url=http://10.10.13.87:8
<http://10.10.13.87:8>> select events[1]+1 from gis_tracking3;
+------------------------------+
| (ARRAY_ELEM(EVENTS, 1) + 1) |
+------------------------------+
| 11 |
| 2223 |
| null |
| null |
| 10001 |
+------------------------------+
## when querying events, it throws exception:
0: jdbc:phoenix:thin:url=http://10.10.13.87:8
<http://10.10.13.87:8>> select events from gis_tracking3;
java.lang.ClassCastException: java.lang.Integer cannot be cast
to java.lang.Long
at org.apache.phoenix.shaded.org
<http://org.apache.phoenix.shaded.org>.apache.calcite.avatica.util.AbstractCursor$LongAccessor.getLong(AbstractCursor.java:550)
at org.apache.phoenix.shaded.org
<http://org.apache.phoenix.shaded.org>.apache.calcite.avatica.util.AbstractCursor$ArrayAccessor.convertValue(AbstractCursor.java:1310)
at org.apache.phoenix.shaded.org
<http://org.apache.phoenix.shaded.org>.apache.calcite.avatica.util.AbstractCursor$ArrayAccessor.getObject(AbstractCursor.java:1289)
at org.apache.phoenix.shaded.org
<http://org.apache.phoenix.shaded.org>.apache.calcite.avatica.util.AbstractCursor$ArrayAccessor.getArray(AbstractCursor.java:1342)
at org.apache.phoenix.shaded.org
<http://org.apache.phoenix.shaded.org>.apache.calcite.avatica.util.AbstractCursor$ArrayAccessor.getString(AbstractCursor.java:1354)
at org.apache.phoenix.shaded.org
<http://org.apache.phoenix.shaded.org>.apache.calcite.avatica.AvaticaResultSet.getString(AvaticaResultSet.java:257)
at sqlline.Rows$Row.<init>(Rows.java:183)
at sqlline.BufferedRows.<init>(BufferedRows.java:38)
at sqlline.SqlLine.print(SqlLine.java:1660)
at sqlline.Commands.execute(Commands.java:833)
at sqlline.Commands.sql(Commands.java:732)
at sqlline.SqlLine.dispatch(SqlLine.java:813)
at sqlline.SqlLine.begin(SqlLine.java:686)
at sqlline.SqlLine.start(SqlLine.java:398)
at sqlline.SqlLine.main(SqlLine.java:291)
at
org.apache.phoenix.queryserver.client.SqllineWrapper.main(SqllineWrapper.java:93)
I guess there is some issue in query sever, but can't figure out
why.
Any suggestions?
Thanks,
Wei
