[jira] [Created] (CALCITE-7523) Support the syntax SELECT * REPLACE(expr as column)

["Yu Xu (Jira)" <ji...@apache.org>]

Yu Xu created CALCITE-7523:
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             Summary: Support the syntax SELECT * REPLACE(expr as column)
                 Key: CALCITE-7523
                 URL: https://issues.apache.org/jira/browse/CALCITE-7523
             Project: Calcite
          Issue Type: Improvement
          Components: core
    Affects Versions: 1.41.0
            Reporter: Yu Xu
            Assignee: Yu Xu
             Fix For: 1.42.0


ClickHouse, Doris, StarRocks, Databend, BigQuery, Hive/Spark support * REPLACE(expr as column);
eg,we can refer ClickHouse:https://clickhouse.com/docs/zh/sql-reference/statements/select/replace-modifier

The benefits of introducing this syntax are：

1. Eliminates verbose column enumeration — When a table has dozens of columns and you only need to transform one or two, `REPLACE` lets you keep the wildcard while overriding just the columns that matter, avoiding long, error-prone select lists.

2. Preserves schema stability — Unlike manually listing columns, `REPLACE` maintains the original column names and their positional order. Adding a new column to the table later won't break the query.

3. Complements `EXCLUDE` for full star-modification coverage — With both `EXCLUDE` (remove columns) and `REPLACE` (overwrite columns), Calcite now supports the complete set of ClickHouse-style star modifiers, making the Babel dialect more feature-complete.

4. Reduces maintenance burden — Queries like `SELECT * REPLACE(UPPER(name) AS name)` are self-documenting and easier to maintain than repeating every column name just to apply a single expression.

5. ClickHouse compatibility — This syntax is natively supported by ClickHouse, so adding it improves interoperability for users migrating or federating queries from that system.



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