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https://issues.apache.org/jira/browse/IMPALA-7618?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18063905#comment-18063905
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Joaquín Antonio De Vicente López commented on IMPALA-7618:
----------------------------------------------------------
A proposed fix has been submitted:
https://github.com/apache/impala/pull/87
The patch normalizes range partition predicates so that logically equivalent
expressions such as:
VALUES >= X
X <= VALUES
are treated identically during ADD/DROP RANGE PARTITION operations.
> Kudu table Create/Alter syntax should accept 'VALUES <= <lit>'
> --------------------------------------------------------------
>
> Key: IMPALA-7618
> URL: https://issues.apache.org/jira/browse/IMPALA-7618
> Project: IMPALA
> Issue Type: Bug
> Components: Frontend
> Affects Versions: Impala 2.2.0
> Reporter: Dan Burkert
> Priority: Major
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Currently Impala allows the {{PARTITION 200 <= VALUES}} syntax to specify an
> unbounded-above range partition in a Kudu table, but not {{PARTITION VALUES
> >= 200}}. Since these expressions are equivalent it would be nice if both
> were accepted.
>
> I would normally consider this an improvement and not a bug, however there is
> currently a mismatch between how Kudu pretty-prints these partitions and how
> Impala parses them. This mismatch makes it very likely that users will hit
> this issue and be stumped. For example:
>
> {code:java}
> > CREATE TABLE dan_test (a int, PRIMARY KEY (a))
> PARTITION BY RANGE (a) (
> PARTITION 0 <= VALUES < 100,
> PARTITION VALUES >= 200
> ) STORED AS KUDU;
> ERROR: AnalysisException: Syntax error in line 4:
> PARTITION VALUES >= 200
> ^
> Encountered: >
> Expected: COMMA
> CAUSED BY: Exception: Syntax error
> > CREATE TABLE dan_test (a int, PRIMARY KEY (a))
> PARTITION BY RANGE (a) (
> PARTITION 0 <= VALUES < 100,
> PARTITION 200 <= VALUES
> ) STORED AS KUDU;
> +-------------------------+
> | summary |
> +-------------------------+
> | Table has been created. |
> +-------------------------+
> Fetched 1 row(s) in 1.65s
> > SHOW RANGE PARTITIONS dan_test;
> +-------------------+
> | RANGE (a) |
> +-------------------+
> | 0 <= VALUES < 100 |
> | VALUES >= 200 |
> +-------------------+
> Fetched 2 row(s) in 3.73s
> > ALTER TABLE dan_test DROP RANGE PARTITION VALUES >= 100;
> Query: ALTER TABLE dan_test DROP RANGE PARTITION VALUES >= 100
> ERROR: AnalysisException: Syntax error in line 1:
> ALTER TABLE dan_test DROP RANGE PARTITION VALUES >= 100
> ^
> Encountered: >
> Expected: COMMA
> CAUSED BY: Exception: Syntax error
> > ALTER TABLE dan_test DROP RANGE PARTITION 100 <= VALUES;
> Query: ALTER TABLE dan_test DROP RANGE PARTITION 100 <= VALUES
> ERROR: ImpalaRuntimeException: Error dropping range partition in table
> dan_test
> CAUSED BY: NonRecoverableException: No range partition found for drop
> range partition step: VALUES >= 100
> > ALTER TABLE dan_test DROP RANGE PARTITION 200 <= VALUES;
> Query: ALTER TABLE dan_test DROP RANGE PARTITION 200 <= VALUES
> +-----------------------------------+
> | summary |
> +-----------------------------------+
> | Range partition has been dropped. |
> +-----------------------------------+
> Fetched 1 row(s) in 0.10s
> > SHOW PARTITIONS dan_test;
> Query: SHOW PARTITIONS dan_test
>
> +--------+-----------+----------+-----------------------------------+------------+
> | # Rows | Start Key | Stop Key | Leader Replica | #
> Replicas |
>
> +--------+-----------+----------+-----------------------------------+------------+
> | -1 | 80000000 | 80000064 | nightly6x-4.vpc.cloudera.com:7050 | 3
> |
>
> +--------+-----------+----------+-----------------------------------+------------+
> Fetched 1 row(s) in 0.04s{code}
>
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