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https://issues.jboss.org/browse/TEIID-3621?page=com.atlassian.jira.plugin...
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Steven Hawkins commented on TEIID-3621:
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But the translator cannot assume that PK defined in VDB is same as
the one in the Phoenix (ROW column in the HBase respectively)
It can if that is an explicit in the documentation of the translator - and will be the
case if automatically importing the metadata. There are lots of scenarios across all of
translators where users can craft source metadata that isn't supported by the
translator (invalid datatypes, even missing columns, etc.). In this case if you want a
different primary key, then a view should be introduced or you could just mark the
username column with a unique constraint.
The caveat with removing the restriction would be to test if there is additional overhead
with specifying all columns with the upsert.
HBase translator - UPDATE statement requires primary key
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Key: TEIID-3621
URL:
https://issues.jboss.org/browse/TEIID-3621
Project: Teiid
Issue Type: Bug
Affects Versions: 8.7.1.6_2
Environment: Hbase: 1.1.1
Phoenix: 4.5.0-HBase-1.1
Reporter: Juraj DurĂ¡ni
Assignee: Kylin Soong
The HBase translator requires table to have a primary key defined. Is the PK really
needed? If the table has no PK defined, then all columns are PK. E.g. query *UPDATE
hbase.SmallA SET StringNum = '555' WHERE hbase.SmallA.StringNum IS NULL* is
translated as *UPSERT INTO smalla (stringnum, intkey) SELECT '555', smalla.intkey
FROM smalla WHERE smalla.stringnum IS NULL* (intkey is PK). Teiid can simply add all
columns (except those defined in 'SET').
Yes, I know that HBase requires the PK to be defined, but what happen if a user decide to
change PK in VDB [1]? It could be a problem whether PK is in VDB defined or not.
I suggest to add a hbase-translator-specific execution property which define PK in the
source table and remove AssertionError [2].
[1]
*HBase table:* create table mytable(id integer primary key, nickname varchar(1))
*Teiid table:* create table mytable(id integer, username varchar(1) primary key)
Both, id and username, are valid PK (artificial/natural).
[2]
https://github.com/teiid/teiid/blob/master/connectors/translator-hbase/sr...
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