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https://issues.apache.org/jira/browse/CALCITE-3247?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16912759#comment-16912759
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Julian Hyde commented on CALCITE-3247:
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Can you rework the description and commit message to be consistent with
CALCITE-3220.
> wrong sql format when transforming function SUBSTRING to hive sql
> -----------------------------------------------------------------
>
> Key: CALCITE-3247
> URL: https://issues.apache.org/jira/browse/CALCITE-3247
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.19.0
> Reporter: Jacky Woo
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Let's assume sql = SELECT SUBSTRING('ABC', 2)
> When we use HiveSqlDialect and transform "sql", we expect SUBSTRING(' abc',
> 2)，but get SUBSTRING(' abc' FROM 2) which is incorrect sql format in hive.
> So maybe HiveSqlDialect behavior should be changed when transform function
> SUBSTRING:
> # {{SELECT SUBSTRING('ABC', 2) => SELECT SUBSTRING('ABC', 2)}}
> # {{SELECT SUBSTRING('ABC', 2, 3) => SELECT SUBSTRING('ABC', 2, 3) }}
> # {{SELECT SUBSTRING('ABC' FROM 2) => SELECT SUBSTRING('ABC', 2) }}
> # {{SELECT SUBSTRING('ABC' FROM 2 FOR 3) => SELECT SUBSTRING('ABC', 2, 3) }}
>
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