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https://issues.apache.org/jira/browse/PHOENIX-7585?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Viraj Jasani resolved PHOENIX-7585.
-----------------------------------
Resolution: Fixed
> New BSON Condition Function begins_with()
> -----------------------------------------
>
> Key: PHOENIX-7585
> URL: https://issues.apache.org/jira/browse/PHOENIX-7585
> Project: Phoenix
> Issue Type: New Feature
> Reporter: Viraj Jasani
> Assignee: Viraj Jasani
> Priority: Major
> Fix For: 5.3.0
>
>
> PHOENIX-7463 provides us with the ability to generate and evaluate AST
> (Abstract Syntax Tree) for the BSON condition expression evaluation for it's
> SQL type expressions.
> The purpose of this Jira is to provide a new internal function (similar to
> field_exists(), field_not_exists() etc) within BSON_CONDITION_EXPRESSION()
> such that it can identify whether the value of the given document field of
> type BsonString or BsonBinary has prefix value as the constant provided in
> the second argument.
> begins_with(fieldKey, substr) => here, fieldKey represents field key's path
> in the given BSON document. substr represents value which needs to be
> compared as the prefix value of path field from the document. The function
> should only support BsonString and BsonBinary types for prefix search.
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