[BUGS] BUG: aliases does not work ((

[Eugen.Konkov]

 SELECT
MIN(COALESCE(cmp_values(parent_td.value, parent_md.value, parent_cmp.value),0)) 
as chk_parent,
FROM some_table

having chk_parent > 0

ERROR:  column "chk_parent" does not exist at character 2342