[teiid-issues] [JBoss JIRA] (TEIID-3996) SAP HANA materialization: MATVIEW_ONERROR_ACTION set to WAIT problem
Steven Hawkins (JIRA)
issues at jboss.org
Thu Feb 25 09:43:00 EST 2016
[ https://issues.jboss.org/browse/TEIID-3996?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Steven Hawkins resolved TEIID-3996.
-----------------------------------
Resolution: Duplicate Issue
See TEIID-3983
> SAP HANA materialization: MATVIEW_ONERROR_ACTION set to WAIT problem
> --------------------------------------------------------------------
>
> Key: TEIID-3996
> URL: https://issues.jboss.org/browse/TEIID-3996
> Project: Teiid
> Issue Type: Bug
> Components: Query Engine
> Affects Versions: 8.12.x
> Reporter: Jan Stastny
> Assignee: Steven Hawkins
>
> When using materialization wit SAP HANA datasource, a problem emerges when "teiid_rel:MATVIEW_ONERROR_ACTION" 'WAIT' is defined for the materialized view.
> The query which initiates matview's loading doesn't wait for its completion, thus returns stale data (empty resultset in case of the initial invocation).
> Materialized view definition:
> {code:sql}
> CREATE VIEW external_long_ttl (
> customer_id integer NOT NULL,
> total_amount integer
> ) OPTIONS (
> MATERIALIZED 'TRUE',
> UPDATABLE 'FALSE',
> MATERIALIZED_TABLE 'Source.JSTASTNY.dv_matviews_mat_view',
> "teiid_rel:ALLOW_MATVIEW_MANAGEMENT" 'true',
> "teiid_rel:MATVIEW_STATUS_TABLE" 'Source.JSTASTNY.dv_matviews_statustable',
> "teiid_rel:ON_VDB_START_SCRIPT" 'MERGE INTO dv_matviews_check_table(id,vdb_create) SELECT id, vdb_create+1 FROM dv_matviews_check_table WHERE id=''external_long_ttl'';',
> "teiid_rel:ON_VDB_DROP_SCRIPT" 'MERGE INTO dv_matviews_check_table(id,vdb_drop) SELECT id, vdb_drop+1 FROM dv_matviews_check_table WHERE id=''external_long_ttl'';',
> "teiid_rel:MATVIEW_LOAD_SCRIPT" 'INSERT INTO dv_matviews_mat_view_stage(customer_id,total_amount) SELECT CONVERT(c.id,integer) AS customer_id, CONVERT(SUM(o.amount),integer) AS total_amount FROM dv_matviews_customers c INNER JOIN dv_matviews_orders o ON c.id = o.customer_id GROUP BY c.id;',
> "teiid_rel:MATVIEW_BEFORE_LOAD_SCRIPT" 'exec Source.native(''truncate table dv_matviews_mat_view_stage'');MERGE INTO dv_matviews_check_table(id,before_load) SELECT id, before_load+1 FROM dv_matviews_check_table WHERE id=''external_long_ttl'';',
> "teiid_rel:MATVIEW_AFTER_LOAD_SCRIPT" 'exec Source.native(''RENAME TABLE dv_matviews_mat_view_stage TO dv_matviews_mat_view_temp'');exec Source.native(''RENAME TABLE dv_matviews_mat_view TO dv_matviews_mat_view_stage'');exec Source.native(''RENAME TABLE dv_matviews_mat_view_temp TO dv_matviews_mat_view'');MERGE INTO dv_matviews_check_table(id,after_load) SELECT id, after_load+1 FROM dv_matviews_check_table WHERE id=''external_long_ttl'';',
> "teiid_rel:MATVIEW_ONERROR_ACTION" 'WAIT',
> "teiid_rel:MATVIEW_TTL" 20000
> ) AS SELECT CONVERT(c.id,integer) AS customer_id, CONVERT(SUM(o.amount),integer) AS total_amount FROM dv_matviews_customers c INNER JOIN dv_matviews_orders o ON c.id = o.customer_id GROUP BY c.id;
> {code}
> Query performed:
> {code:sql}
> SELECT * FROM external_long_ttl;
> {code}
> Reproducer:
> {code:java}
> Statement statement = connection.createStatement();
> // invoke initial load, won't return loaded data even though it should
> ResultSet rs1 = statement.executeQuery("SELECT * FROM external_long_ttl;");
> Assert.assertFalse(rs1.next());
> // wait explicitly for the loading to finish
> Thread.sleep(7000);
> // repeat the query, to get the data after load finished
> ResultSet rs2 = statement.executeQuery("SELECT * FROM external_long_ttl;");
> Assert.assertTrue(rs2.next());
> .
> .
> .
> {code}
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