src/Gargantext/Database/Triggers/NodeNodeNgrams.hs

   1 {-|
   2 Module      : Gargantext.Database.Triggers.NodeNodeNgrams
   3 Description : Triggers configuration
   4 Copyright   : (c) CNRS, 2017-Present
   5 License     : AGPL + CECILL v3
   6 Maintainer  : team@gargantext.org
   7 Stability   : experimental
   8 Portability : POSIX
   9
  10 Triggers on NodeNodeNgrams table.
  11
  12 -}
  13
  14 {-# LANGUAGE QuasiQuotes       #-}
  15 {-# LANGUAGE NoImplicitPrelude #-}
  16 {-# LANGUAGE OverloadedStrings #-}
  17 {-# LANGUAGE RankNTypes        #-}
  18
  19 module Gargantext.Database.Triggers.NodeNodeNgrams
  20   where
  21
  22 import Database.PostgreSQL.Simple.SqlQQ (sql)
  23 -- import Database.PostgreSQL.Simple.Types (Values(..), QualifiedIdentifier(..))
  24 import Gargantext.Database.Config (nodeTypeId)
  25 import Gargantext.Database.Types.Node -- (ListId, CorpusId, NodeId)
  26 import Gargantext.Database.Utils (Cmd, execPGSQuery)
  27 import Gargantext.Prelude
  28 import qualified Database.PostgreSQL.Simple as DPS
  29
  30 triggerCountInsert :: Cmd err Int64
  31 triggerCountInsert = execPGSQuery query (nodeTypeId NodeDocument, nodeTypeId NodeList)
  32   where
  33     query :: DPS.Query
  34     query = [sql|
  35           CREATE OR REPLACE FUNCTION set_ngrams_global_count() RETURNS trigger AS $$
  36           BEGIN
  37             IF pg_trigger_depth() <> 1 THEN
  38               RETURN NEW;
  39             END IF;
  40             IF TG_OP = 'INSERT' THEN
  41                 INSERT INTO node_node_ngrams (node1_id, node2_id, ngrams_id, ngrams_type, weight)
  42                 select n.parent_id, n.id, new1.ngrams_id, new1.ngrams_type, count(*) from NEW as new1
  43                     INNER JOIN nodes n  ON n.id = new1.node1_id
  44                     INNER JOIN nodes n2 ON n2.id = new1.node2_id
  45                     WHERE n2.typename = ?  -- not mandatory
  46                       AND n.typename = ?   -- not mandatory
  47                       AND n.parent_id <> n2.id -- not mandatory
  48                     GROUP BY n.parent_id, n.id, new1.ngrams_id, new1.ngrams_type
  49                 ON CONFLICT (node1_id, node2_id, ngrams_id, ngrams_type)
  50                    DO UPDATE set weight = node_node_ngrams.weight + excluded.weight
  51                    ;
  52             END IF;
  53
  54             RETURN NULL;
  55           END
  56           $$ LANGUAGE plpgsql;
  57
  58           -- DROP trigger trigger_count_insert on node_node_ngrams;
  59
  60           CREATE TRIGGER trigger_count_insert AFTER INSERT on node_node_ngrams
  61           REFERENCING NEW TABLE AS NEW
  62           FOR EACH STATEMENT
  63           EXECUTE PROCEDURE set_ngrams_global_count();
  64    |]
  65
  66