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::xotcl::Object ::xo::db::sql

::xotcl::Object create ::xo::db::sql

Methods

• proc datatype_constraint

  ::254868 proc datatype_constraint {type table att} {
        # for postgres, we do not need type specific constraints
        return ""
      }
  

• proc date_trunc

  ::254868 proc date_trunc {field date} {
        return "date_trunc('$field',$date)"
      }
  

• proc date_trunc_expression

  ::254868 proc date_trunc_expression {field date date_string} {
        return "date_trunc('$field',$date) = '$date_string'"
      }
  

• proc map_datatype

  ::254868 proc map_datatype type {
        switch -- $type {
          string    { set type text }
          long_text { set type text }
          date      { set type "timestamp with time zone" }
          ltree     { set type [expr {[::xo::db::has_ltree] ? "ltree" : "text" }] }
        }
        return $type
      }
  

• proc map_function_name

  ::254868 proc map_function_name sql {
        return $sql
      }
  

• proc select

  ::254868 proc select {-vars:required -from:required {-where ""} {-groupby ""} {-limit ""} {-offset ""} {-start ""} {-orderby ""} {-map_function_names false}} {
        set where_clause  [expr {$where   ne "" ? "WHERE $where" : ""}]
        set offset_clause [expr {$offset  ne "" ? "OFFSET $offset" : ""}]
        set limit_clause  [expr {$limit   ne "" ? "LIMIT $limit" : ""}]
        set order_clause  [expr {$orderby ne "" ? "ORDER BY $orderby" : ""}]
        set group_clause  [expr {$groupby ne "" ? "GROUP BY $groupby" : ""}]
        return "SELECT $vars FROM $from $where_clause $group_clause $order_clause $limit_clause $offset_clause"
      }
  

• proc since_interval_condition

  ::254868 proc since_interval_condition {var interval} {
      set since [clock format [clock scan "-$interval"] -format "%Y-%m-%d %T"]
      return "$var > TO_TIMESTAMP('$since','YYYY-MM-DD HH24:MI:SS')"
    }
  

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