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https://issues.apache.org/jira/browse/CALCITE-6315?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17828503#comment-17828503
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Norman Jordan commented on CALCITE-6315:
----------------------------------------

These template patterns are supported by PostgreSQL 14 and are missing from 
Calcite. PostgreSQL 14 supports all of the template patterns in Calcite.
 * HH
 * US
 * SSSS
 * SSSSS
 * AM
 * A.M.
 * am
 * a.m.
 * PM
 * P.M.
 * pm
 * p.m.
 * Y,YYY
 * YYY
 * Y
 * IYYY
 * IYY
 * IY
 * I
 * BC
 * B.C.
 * bc
 * b.c.
 * AD
 * A.D.
 * ad
 * a.d.
 * MONTH
 * month
 * MON
 * mon
 * DAY
 * day
 * Dy
 * dy
 * IDDD
 * ID
 * TZH
 * TZM
 * OF

[Calcite PostgreSQL template 
patterns|https://github.com/apache/calcite/blob/main/core/src/main/java/org/apache/calcite/util/format/FormatModels.java#L148]

[PostgreSQL 14 template 
patterns|https://www.postgresql.org/docs/14/functions-formatting.html#FUNCTIONS-FORMATTING-DATETIME-TABLE]

> Support PostgreSQL TO_CHAR, TO_DATE, TO_TIMESTAMP
> -------------------------------------------------
>
>                 Key: CALCITE-6315
>                 URL: https://issues.apache.org/jira/browse/CALCITE-6315
>             Project: Calcite
>          Issue Type: Sub-task
>            Reporter: James Duong
>            Priority: Minor
>
> PostgreSQL supports different format strings than the version we have 
> implemented.



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