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Support "date" and "timestamp" inside window frame RANGE Queries #631

@mustafasrepo

Description

@mustafasrepo

Support INTERVAL in window RANGE Queries

Currently, we do not support the queries taking date or timestamp for range inside window frames. Following query

SELECT 
COUNT(*) OVER (ORDER BY ts RANGE BETWEEN  '1 DAY' PRECEDING AND '1 DAY' FOLLOWING) 
FROM t;

produces the error below:

ParserError("Expected literal int, found: INTERVAL")

Relevant section in the code, where window frame bounds are parsed can be found here.

sqlparser-rs/parser.rs at 6afd194e947cfd800376f424ff7c300ee385cd9e · sqlparser-rs/sqlparser-rs

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