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https://issues.apache.org/jira/browse/CALCITE-4433?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Julian Hyde resolved CALCITE-4433.
----------------------------------
Fix Version/s: 1.27.0
Resolution: Fixed
Fixed in
[e3b8b629|https://github.com/apache/calcite/commit/e3b8b629f89ce5ffd25b4ef713258d83afd683cc].
> Add UNPIVOT operator to SQL
> ---------------------------
>
> Key: CALCITE-4433
> URL: https://issues.apache.org/jira/browse/CALCITE-4433
> Project: Calcite
> Issue Type: Bug
> Reporter: Julian Hyde
> Priority: Major
> Fix For: 1.27.0
>
>
> Add {{UNPIVOT}} operator to SQL. (We added {{PIVOT}} in CALCITE-3752, and
> {{UNPIVOT}} is the inverse.)
> Oracle has {{UNPIVOT}}. For
> [example|https://oracle-base.com/articles/11g/pivot-and-unpivot-operators-11gr1#unpivot]:
> {noformat}
> SELECT * FROM unpivot_test;
> ID CUSTOMER_ID PRODUCT_CODE_A PRODUCT_CODE_B PRODUCT_CODE_C
> PRODUCT_CODE_D
> ---------- ----------- -------------- -------------- --------------
> --------------
> 1 101 10 20 30
> 2 102 40 50
> 3 103 60 70 80
> 90
> 4 104 100
> 4 rows selected.
> SQL> SELECT *
> FROM unpivot_test
> UNPIVOT (quantity FOR product_code IN (product_code_a AS 'A', product_code_b
> AS 'B', product_code_c AS 'C', product_code_d AS 'D'));
> ID CUSTOMER_ID P QUANTITY
> ---------- ----------- - ----------
> 1 101 A 10
> 1 101 B 20
> 1 101 C 30
> 2 102 A 40
> 2 102 C 50
> 3 103 A 60
> 3 103 B 70
> 3 103 C 80
> 3 103 D 90
> 4 104 A 100
> 10 rows selected.
> {noformat}
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