ramnes opened a new issue, #2408:
URL: https://github.com/apache/datafusion-sqlparser-rs/issues/2408

   `RedshiftSqlDialect` on version 0.62.0 fails to parse a few core Redshift 
statements that the real engine accepts (tested on Redshift 1.0.347559):
   
   ```sql
   -- 1. APPROXIMATE COUNT(DISTINCT)
   SELECT APPROXIMATE COUNT(DISTINCT id) FROM t;
   -- Expected: end of statement, found: (
   
   -- 2. Column-level ENCODE in CREATE TABLE
   CREATE TABLE t (id INT ENCODE az64, name VARCHAR(20) ENCODE lzo);
   -- Expected: ',' or ')' after column definition, found: ENCODE
   
   -- 3. CREATE EXTERNAL SCHEMA (Spectrum)
   CREATE EXTERNAL SCHEMA s FROM DATA CATALOG DATABASE 'db' IAM_ROLE 'arn:...';
   -- Expected: TABLE, found: SCHEMA
   ```
   
   Each is documented, common Redshift syntax:
   - `APPROXIMATE COUNT(DISTINCT ...)`: HyperLogLog cardinality 
[(docs)](https://docs.aws.amazon.com/redshift/latest/dg/r_COUNT.html)
   - column-level compression `ENCODE <encoding>` in `CREATE TABLE` 
[(docs)](https://docs.aws.amazon.com/redshift/latest/dg/r_CREATE_TABLE_NEW.html)
   - `CREATE EXTERNAL SCHEMA ... FROM DATA CATALOG`: Redshift Spectrum 
[(docs)](https://docs.aws.amazon.com/redshift/latest/dg/r_CREATE_EXTERNAL_SCHEMA.html)
   
   


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