virajjasani opened a new pull request, #2193:
URL: https://github.com/apache/phoenix/pull/2193
Jira: PHOENIX-7641
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:
```
{
"$EXPR": "#press = :press AND #track[0].#shot[2][0].#city.#standard[50] =
:softly",
"$VAL": {
":press": "beat",
":softly": "softly"
},
"$KEYS": {
"#press": "press",
"#track": "track",
"#shot": "shot",
"#city": "city",
"#standard": "standard"
}
}
```
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