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https://issues.apache.org/jira/browse/PHOENIX-7641?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Viraj Jasani reassigned PHOENIX-7641:
-------------------------------------
Assignee: Viraj Jasani
> Support placeholder for document field keys in BSON condition expression
> ------------------------------------------------------------------------
>
> Key: PHOENIX-7641
> URL: https://issues.apache.org/jira/browse/PHOENIX-7641
> Project: Phoenix
> Issue Type: Improvement
> Reporter: Viraj Jasani
> Assignee: Viraj Jasani
> Priority: Major
> Fix For: 5.3.0
>
>
> BSON supports various non-alphanumeric values as document field keys which
> are case sensitive. Not all can be used in the BSON_CONDITION_EXPRESSION()
> antlr grammar as the field key can have duplicate meaning with operator. e.g.
> ">" is valid field key, therefore condition expression "> > :val" is valid
> because the expression tries to evaluate whether the value of ">" key is
> greater than the value represented by ":val" value placeholder. However, the
> antlr grammar needs to recognize ">" as only "greater-than" symbol to avoid
> ambiguity.
> For complex key names like this, it is recommended to provide them as key
> alias placeholders as part of the condition expression document argument,
> which already consists of value alias placeholders.
> Example:
> {code:java}
> {
> "$EXPR": "#press = :press AND #track[0].#shot[2][0].#city.#standard[50] =
> :softly",
> "$VAL": {
> ":press": "beat",
> ":softly": "softly"
> },
> "$KEYS": {
> "#press": "press",
> "#track": "track",
> "#shot": "shot",
> "#city": "city",
> "#standard": "standard"
> }
> } {code}
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