Frozen indices are deprecated which makes all the [SQL features supporting frozen indices](https://www.elastic.co/guide/en/elasticsearch/reference/current/sql-index-frozen.html) obsolete.

This includes:

* `index_include_frozen` request parameter in the `_sql` endpoint
* `index.include.frozen` (J|O)DBC driver settings
* `SHOW TABLES INCLUDE FROZEN` queries and the `FROZEN INDEX` kind in the corresponding response
* The `FROZEN` modifier in `FROM` clauses (as in `SELECT * FROM FROZEN archive`)

`_search` raises a deprecation warning when frozen indices are being searched with `ignore_throttled=false`. SQL could do the same when the `index_include_frozen` request parameter is set or when the `FROZEN` keyword is used.

Relates to https://github.com/elastic/elasticsearch/issues/70192
x-pack/plugin/sql/src/main/java/org/elasticsearch/xpack/sql/parser/CommandBuilder.java
}
        
        EnumSet<IndexType> set = types.isEmpty() ? null : EnumSet.copyOf(types);
        TableIdentifier ti = visitTableIdentifier(ctx.tableIdent);
        String index = ti != null ? ti.qualifiedIndex() : null;
        return new SysTables(source(ctx), visitLikePattern(ctx.clusterLike), index, visitLikePattern(ctx.tableLike), set);
    }
    @Override
    public Object visitSysColumns(SysColumnsContext ctx) {
        TableIdentifier ti = visitTableIdentifier(ctx.tableIdent);
        String index = ti != null ? ti.qualifiedIndex() : null;
        return new SysColumns(
            source(ctx),
            string(ctx.cluster),
            index,
            visitLikePattern(ctx.tableLike),
            visitLikePattern(ctx.columnPattern)
        );
    }
    @Override
    public SysTypes visitSysTypes(SysTypesContext ctx) {
        int type = 0;
        if (ctx.type != null) {
            Literal value = (Literal) visit(ctx.type);
            type = ((Number) value.fold()).intValue();
        }
        return new SysTypes(source(ctx), Integer.valueOf(type));
    }
}