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https://issues.apache.org/jira/browse/IGNITE-17285?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17563744#comment-17563744
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Yury Gerzhedovich commented on IGNITE-17285:
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Aleksey is right. Aditionaly could say that duplication issue is known issue -
IGNITE-11125
> Ambiguous output of INDEXES SytemView if cache is created via DDL
> ------------------------------------------------------------------
>
> Key: IGNITE-17285
> URL: https://issues.apache.org/jira/browse/IGNITE-17285
> Project: Ignite
> Issue Type: Bug
> Reporter: Ilya Shishkov
> Priority: Minor
> Labels: ise
> Attachments: SqlIndexSystemViewReproducerTest.patch,
> create_table.txt, query_entity.txt
>
>
> There is a difference in 'COLUMNS ' and 'INLINE_SIZE' columns content in
> system view 'INDEXES', when you create SQL-cache by means of QueryEntity and
> by means of DDL.
> As you can see in reproducer [^SqlIndexSystemViewReproducerTest.patch] ,
> there are two "equal" attepmts to create cache: via DDL, and via Cache API +
> QueryEntity.
> Primary keys contains equal set of fields, affinity fields are the same.
> Outputs of system views TABLES, TABLE_COLUMNS and BINARY_METADATA are the
> same for both ways of cache creation. Table content (i.e. select *) is also
> the same, if you do not take into account the order of output.
> There are example sqlline outputs for table from reproducer:
> # [^create_table.txt] - for table, created by DDL.
> # [^query_entity.txt] - for table, created by Cache API.
> As you can see, colums and content differs in INDEXES view: in case of DDL,
> indexes does not have '_KEY' column, and have explicit set of columns from
> primary key. Also, there is a duplication of affinity column 'ID' for :
> {code}
> "ID" ASC, "FIRSTNAME" ASC, "LASTNAME" ASC, "ID" ASC
> {code}
> In case of creation table via Cache API + QueryEntity, no exlicit primary key
> columns are shown, but '_KEY' column is, and there is no duplication of
> affinity column 'ID' in '_key_PK_hash' index.
> Reproducer dumps indexes ({{org.h2.index.Index}}) collection content, which
> is obtained from {{GridH2Table#getIndexes}}. It seems, that information
> differs in this class too.
> Example output:
> {code:java|title=Cache API + QueryEntity}
> Index name Columns
> _key_PK__SCAN_ [_KEY, ID]
> _key_PK_hash [_KEY, ID]
> _key_PK [_KEY, ID]
> AFFINITY_KEY [ID, _KEY]
> PERSONINFO_CITYNAME_IDX [CITYNAME, _KEY, ID]
> {code}
> {code:java|title=DDL}
> Index name Columns
> _key_PK__SCAN_ [ID, FIRSTNAME, LASTNAME]
> _key_PK_hash [_KEY, ID]
> _key_PK [ID, FIRSTNAME, LASTNAME]
> AFFINITY_KEY [ID, FIRSTNAME, LASTNAME]
> PERSONINFO_CITYNAME_IDX [CITYNAME, ID, FIRSTNAME, LASTNAME]
> {code}
> If such difference is not a bug, it should be documented.
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