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https://issues.apache.org/jira/browse/HIVE-25230?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Quanlong Huang reassigned HIVE-25230:
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> add position and occurrence to instr()
> --------------------------------------
>
> Key: HIVE-25230
> URL: https://issues.apache.org/jira/browse/HIVE-25230
> Project: Hive
> Issue Type: New Feature
> Components: UDF
> Reporter: Quanlong Huang
> Assignee: Quanlong Huang
> Priority: Major
>
> Current instr() only supports two arguments:
> {code:java}
> instr(str, substr) - Returns the index of the first occurance of substr in str
> {code}
> Other systems (Vertica, Oracle, Impala etc) support additional position and
> occurrence arguments:
> {code:java}
> instr(str, substr[, pos[, occurrence]])
> {code}
> Oracle doc:
> [https://docs.oracle.com/database/121/SQLRF/functions089.htm#SQLRF00651]
> It'd be nice to support this as well. Otherwise, it's a SQL difference
> between Impala and Hive.
> Impala supports this in IMPALA-3973
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