Steps to reproduce

try (Statement s = connection.createStatement()) {
    try {
        s.executeUpdate("create table t (i int, j int, primary key (i)) engine = MergeTree()");
        s.executeUpdate("alter table t alter column j default 1");
    }
    finally {
        s.executeUpdate("drop table if exists t");
    }
}

The syntax is perfectly fine:

• https://clickhouse.com/docs/sql-reference/statements/alter/column#modify-column

Error Log or Exception StackTrace

12:35:58,252  WARN [SqlParser                     ] - SQL syntax error at line: 1, pos: 14, mismatched input 'alter' expecting {ADD, ATTACH, CLEAR, COMMENT, DELETE, DETACH, DROP, FREEZE, MATERIALIZE, MODIFY, MOVE, ON, REMOVE, RENAME, REPLACE, UPDATE}

Expected Behaviour

No log entries

Configuration

Environment

• Client version: com.clickhouse:clickhouse-jdbc:0.9.2
• Language version: OpenJDK Runtime Environment Temurin-21.0.7+6 (build 21.0.7+6-LTS)
• OS: Microsoft Windows [Version 10.0.26100.4946]

ClickHouse Server

• ClickHouse Server version: 25.4.4.25