Alexey Kukushkin created IGNITE-13698:
-----------------------------------------
Summary: SQL EXPLAIN Shows Impossible Index
Key: IGNITE-13698
URL: https://issues.apache.org/jira/browse/IGNITE-13698
Project: Ignite
Issue Type: Bug
Components: sql
Affects Versions: 2.9
Reporter: Alexey Kukushkin
+*Steps to Reproduce*+
1. Create a table with a VARCHAR field and an index on that field
{{CREATE TABLE TEST (ID INT PRIMARY KEY, TITLE VARCHAR);}}
{{CREATE INDEX TEST_TITLE_ASC_IDX ON TEST(TITLE); }}
2. Show a plan for querying the table with a filter UPPER(TITLE) LIKE '%A%'
{{EXPLAIN SELECT _KEY FROM TEST WHERE UPPER(TITLE) LIKE '%A%';}}
+*Expected*+
The table SCAN on the TITLE field since the TEST_TITLE_ASC_IDX cannot be
applied due to any of"
# The UPPER(TITLE) SQL function on the left-hand side
# The LIKE pattern starting from % (any symbol)
+*Actual*+
The TEST_TITLE_ASC_IDX is used
{{SELECT}}
{{ __Z0._KEY AS __C0_0}}
{{FROM PUBLIC.TEST __Z0}}
{{ /* PUBLIC.TEST_TITLE_ASC_IDX */}}
{{WHERE UPPER(__Z0.TITLE) LIKE '%A%'}}
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
