Livia created IGNITE-21246: ------------------------------ Summary: Multi-table join query results are abnormal Key: IGNITE-21246 URL: https://issues.apache.org/jira/browse/IGNITE-21246 Project: Ignite Issue Type: Bug Affects Versions: 2.15 Environment: Red Hat Enterprise Linux 7
Apache Ignite In-Memory Distributed Database 2.15.0 Reporter: Livia Hi, When I use Ignite as an SQL database, There are 3 tables to left join, but the result is abnormal. There is only one Ignite server node, and persistence is enabled. I use PARTITIONED mode to create SQL tables, then I execute a join query in a non-colocated mode ({_}jdbc:ignite:thin://localhost;distributedJoins=true{_}). But I got an error prompting a lack of index for the table STUDENT_COURSE. The documentation suggests that a replicated table needs a column index, but these are PARTITIONED tables. _If you use a non-collocated join on a column from a [replicated table|https://ignite.apache.org/docs/2.11.1/data-modeling/data-partitioning#replicated], the column must have an index. Otherwise, you will get an exception._ Okay, I create indexs for it. Then I execute the query again. I expect 6 rows, but actually, only 1 row is returned. A more unusual situation arises when I add a WHERE condition to the query. The result is correct. ---- The detailed commands are as follows: # Create table use PARTITIONED mode, and insert data # {code:java} CREATE TABLE STUDENT( ID BIGINT PRIMARY KEY, NAME VARCHAR, EMAIL VARCHAR, ) WITH "TEMPLATE=PARTITIONED,ATOMICITY=TRANSACTIONAL_SNAPSHOT"; CREATE TABLE STUDENT_COURSE( ID BIGINT PRIMARY KEY, STUDENT_ID BIGINT NOT NULL, COURSE_ID BIGINT NOT NULL, ) WITH "TEMPLATE=PARTITIONED,ATOMICITY=TRANSACTIONAL_SNAPSHOT"; CREATE TABLE COURSE( ID BIGINT PRIMARY KEY, NAME VARCHAR, CREDIT_RATING INT, ) WITH "TEMPLATE=PARTITIONED,ATOMICITY=TRANSACTIONAL_SNAPSHOT"; INSERT INTO STUDENT (ID, NAME, EMAIL) VALUES(10001, 'Tom', 't...@123.com'); INSERT INTO STUDENT (ID, NAME, EMAIL) VALUES(10002, 'Lily', 'l...@123.com'); INSERT INTO STUDENT (ID, NAME, EMAIL) VALUES(10003, 'Sherry', 'she...@123.com'); INSERT INTO STUDENT (ID, NAME, EMAIL) VALUES(10004, 'Petter', 'pet...@123.com'); INSERT INTO STUDENT (ID, NAME, EMAIL) VALUES(10005, 'Livia', 'li...@123.com'); INSERT INTO STUDENT (ID, NAME, EMAIL) VALUES(10006, 'Ada', 'a...@123.com'); INSERT INTO STUDENT_COURSE (ID, STUDENT_ID, COURSE_ID) VALUES(1, 10001, 1); INSERT INTO STUDENT_COURSE (ID, STUDENT_ID, COURSE_ID) VALUES(2, 10002, 2); INSERT INTO STUDENT_COURSE (ID, STUDENT_ID, COURSE_ID) VALUES(3, 10003, 3); INSERT INTO STUDENT_COURSE (ID, STUDENT_ID, COURSE_ID) VALUES(4, 10004, 2); INSERT INTO STUDENT_COURSE (ID, STUDENT_ID, COURSE_ID) VALUES(5, 10005, 3); INSERT INTO COURSE (ID, NAME, CREDIT_RATING) VALUES(1, 'Criminal Evidence', 20); INSERT INTO COURSE (ID, NAME, CREDIT_RATING) VALUES(2, 'Employment Law', 10); INSERT INTO COURSE (ID, NAME, CREDIT_RATING) VALUES(3, 'Jurisprudence', 30); {code} 2.Execute a join query in a non-colocated mode {code:java} SELECT s.ID, s.NAME, s.EMAIL , c.NAME FROM STUDENT s LEFT JOIN STUDENT_COURSE j ON j.STUDENT_ID=s.id LEFT JOIN COURSE c ON c.id=j.COURSE_ID {code} {panel:title=Expect results:} 10001 Tom t...@123.com Criminal Evidence 10002 Lily l...@123.com Employment Law 10003 Sherry she...@123.com Jurisprudence 10004 Petter pet...@123.com Employment Law 10005 Livia li...@123.com Jurisprudence 10006 Ada a...@123.com {panel} {panel:title=actual results} 10006 Ada a...@123.com {panel} 3.Execute a join query with where condition in a non-colocated mode {code:java} SELECT s.ID, s.NAME, s.EMAIL , c.NAME FROM STUDENT s LEFT JOIN STUDENT_COURSE j ON j.STUDENT_ID=s.id LEFT JOIN COURSE c ON c.id=j.COURSE_ID WHERE s.NAME='Sherry' {code} {panel:title=actual results} 10003 Sherry she...@123.com Jurisprudence {panel} -- This message was sent by Atlassian Jira (v8.20.10#820010)