[
https://issues.apache.org/jira/browse/HIVE-18842?focusedWorklogId=271997&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-271997
]
ASF GitHub Bot logged work on HIVE-18842:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 04/Jul/19 05:02
Start Date: 04/Jul/19 05:02
Worklog Time Spent: 10m
Work Description: jcamachor commented on pull request #696: HIVE-18842
URL: https://github.com/apache/hive/pull/696#discussion_r300229497
##########
File path: ql/src/java/org/apache/hadoop/hive/ql/exec/Utilities.java
##########
@@ -4587,4 +4594,20 @@ private static void tryToLogClassPath(String prefix,
ClassLoader loader, Logger
loader == null ? "null" : loader.getClass().getSimpleName());
}
}
+
+ public static String encodeColumnNames(List<String> colNames) throws
SemanticException {
+ try {
+ return JSON_MAPPER.writeValueAsString(colNames);
+ } catch (IOException e) {
+ throw new SemanticException(e);
+ }
+ }
+
+ public static List<String> decodeColumnNames(String colNamesStr) throws
SemanticException {
+ try {
+ return JSON_MAPPER.readValue(colNamesStr, List.class);
Review comment:
`JSON_MAPPER` is just a Jackson `ObjectMapper` object that can be used to
convert JSON into objects and vice versa. In particular, `colNamesStr` here is
the JSON value (in String form) and we pass the `List.class` because we want to
generate an instance of that object.
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Issue Time Tracking
-------------------
Worklog Id: (was: 271997)
Time Spent: 1h (was: 50m)
> CLUSTERED ON/DISTRIBUTED ON+SORTED ON support for materialized views
> --------------------------------------------------------------------
>
> Key: HIVE-18842
> URL: https://issues.apache.org/jira/browse/HIVE-18842
> Project: Hive
> Issue Type: New Feature
> Components: Materialized views
> Affects Versions: 3.0.0
> Reporter: Jesus Camacho Rodriguez
> Assignee: Jesus Camacho Rodriguez
> Priority: Major
> Labels: pull-request-available, todoc4.0
> Attachments: HIVE-18842.01.patch, HIVE-18842.01.patch,
> HIVE-18842.02.patch, HIVE-18842.03.patch, HIVE-18842.patch
>
> Time Spent: 1h
> Remaining Estimate: 0h
>
> We should support defining a {{CLUSTERED ON/DISTRIBUTED ON+SORTED ON}}
> specification for materialized views.
> The syntax should be extended as follows:
> {code:sql}
> CREATE MATERIALIZED VIEW [IF NOT EXISTS] [db_name.]materialized_view_name
> [COMMENT materialized_view_comment]
> [PARTITIONED ON (col_name, ...)]
> [CLUSTERED ON (col_name, ...) | DISTRIBUTED ON (col_name, ...) SORTED ON
> (col_name, ...)] -- NEW!
> [
> [ROW FORMAT row_format]
> [STORED AS file_format]
> | STORED BY 'storage.handler.class.name' [WITH SERDEPROPERTIES (...)]
> ]
> [LOCATION hdfs_path]
> [TBLPROPERTIES (property_name=property_value, ...)]
> AS select_statement;
> {code}
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