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https://issues.apache.org/jira/browse/PHOENIX-7650?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Viraj Jasani reassigned PHOENIX-7650:
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Assignee: Viraj Jasani
> Default value support in BSON_VALUE() for all supported types
> -------------------------------------------------------------
>
> Key: PHOENIX-7650
> URL: https://issues.apache.org/jira/browse/PHOENIX-7650
> Project: Phoenix
> Issue Type: Improvement
> Reporter: Viraj Jasani
> Assignee: Viraj Jasani
> Priority: Major
> Fix For: 5.3.0
>
>
> BSON_VALUE() helps retrieve the value of any document field key with all the
> corresponding data types. For instance, if the value of the given document
> field is of type BsonString and BSON_VALUE() specifies VARCHAR as data type
> for parsing the value at the client side, BsonString value will be encoded to
> VARCHAR data type and returned back as the function output with PVarchar type.
> The purpose of this Jira is to introduce default value support for all of the
> supported scalar data types. This can help avoid multiple calls to
> BSON_VALUE() function. For instance, let's consider all the rows of the table
> has BsonDocument which might contain TTL field. The query that needs to
> retrieve the value of TTL can be something similar to
> {code:java}
> WHERE BSON_VALUE(COL, 'ttlField', 'BIGINT') IS NOT NULL AND BSON_VALUE(COL,
> 'ttlField', 'BIGINT') < TO_NUMBER(CURRENT_TIME()){code}
> For each row, we need to make two function calls to make sure the document
> contains ttlField and it's value is less than current timestamp in ms.
> With support of default value, this can be simplified to only single function
> call:
> {code:java}
> WHERE BSON_VALUE(COL, 'ttlField', 'BIGINT', '9223372036854775807') <
> TO_NUMBER(CURRENT_TIME()){code}
> If the field does not exist, return largest value supported by Long.
> Similarly, this is also helpful while creating index where if the indexed
> field does not exist in the document, the use case prefers creating index on
> some default constant value.
> Also, consider displaying the value of e-commerce product discount offer in
> some % value. If a particular item does not have discount specified, consider
> using default discount value.
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