From a322770d290cae69e7d2f7629ee575e068254428 Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Sun, 27 Nov 2022 14:05:47 +0100
Subject: more work on SQL refactoring

---
 src/exchangedb/0002-wire_out.sql | 86 +++++++++++++++++++++++++++++++---------
 1 file changed, 68 insertions(+), 18 deletions(-)

(limited to 'src/exchangedb/0002-wire_out.sql')

diff --git a/src/exchangedb/0002-wire_out.sql b/src/exchangedb/0002-wire_out.sql
index f34998b58..9c459fe95 100644
--- a/src/exchangedb/0002-wire_out.sql
+++ b/src/exchangedb/0002-wire_out.sql
@@ -14,8 +14,8 @@
 -- TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
 --
 
-CREATE OR REPLACE FUNCTION create_table_wire_out(
-  IN shard_suffix VARCHAR DEFAULT NULL
+CREATE FUNCTION create_table_wire_out(
+  IN partition_suffix VARCHAR DEFAULT NULL
 )
 RETURNS VOID
 LANGUAGE plpgsql
@@ -23,10 +23,9 @@ AS $$
 DECLARE
   table_name VARCHAR DEFAULT 'wire_out';
 BEGIN
-
   PERFORM create_partitioned_table(
     'CREATE TABLE IF NOT EXISTS %I'
-      '(wireout_uuid BIGINT GENERATED BY DEFAULT AS IDENTITY' -- PRIMARY KEY'
+      '(wireout_uuid BIGINT GENERATED BY DEFAULT AS IDENTITY'
       ',execution_date INT8 NOT NULL'
       ',wtid_raw BYTEA UNIQUE NOT NULL CHECK (LENGTH(wtid_raw)=32)'
       ',wire_target_h_payto BYTEA CHECK (LENGTH(wire_target_h_payto)=32)'
@@ -36,37 +35,78 @@ BEGIN
     ') %s ;'
     ,table_name
     ,'PARTITION BY HASH (wtid_raw)'
-    ,shard_suffix
+    ,partition_suffix
   );
-
-  table_name = concat_ws('_', table_name, shard_suffix);
-
-  EXECUTE FORMAT (
-    'CREATE INDEX IF NOT EXISTS ' || table_name || '_by_wire_target_h_payto_index '
-    'ON ' || table_name || ' '
-    '(wire_target_h_payto);'
+  PERFORM comment_partitioned_table(
+     'wire transfers the exchange has executed'
+    ,table_name
+    ,partition_suffix
+  );
+  PERFORM comment_partitioned_column(
+     'identifies the configuration section with the debit account of this payment'
+    ,'exchange_account_section'
+    ,table_name
+    ,partition_suffix
+  );
+  PERFORM comment_partitioned_column(
+     'Identifies the credited bank account and KYC status'
+    ,'wire_target_h_payto'
+    ,table_name
+    ,partition_suffix
   );
-
-
 END
 $$;
 
-CREATE OR REPLACE FUNCTION add_constraints_to_wire_out_partition(
+
+CREATE FUNCTION constrain_table_wire_out(
   IN partition_suffix VARCHAR
 )
 RETURNS void
 LANGUAGE plpgsql
 AS $$
+DECLARE
+  table_name VARCHAR DEFAULT 'wire_out';
 BEGIN
+  table_name = concat_ws('_', table_name, partition_suffix);
   EXECUTE FORMAT (
-    'ALTER TABLE wire_out_' || partition_suffix || ' '
-      'ADD CONSTRAINT wire_out_' || partition_suffix || '_wireout_uuid_pkey '
-        'PRIMARY KEY (wireout_uuid)'
+    'CREATE INDEX ' || table_name || '_by_wire_target_h_payto_index '
+    'ON ' || table_name || ' '
+    '(wire_target_h_payto);'
+  );
+  EXECUTE FORMAT (
+    'ALTER TABLE ' || table_name ||
+    ' ADD CONSTRAINT ' || table_name || '_wireout_uuid_pkey'
+    ' PRIMARY KEY (wireout_uuid)'
   );
 END
 $$;
 
 
+CREATE FUNCTION wire_out_delete_trigger()
+  RETURNS trigger
+  LANGUAGE plpgsql
+  AS $$
+BEGIN
+  DELETE FROM exchange.aggregation_tracking
+   WHERE wtid_raw = OLD.wtid_raw;
+  RETURN OLD;
+END $$;
+COMMENT ON FUNCTION wire_out_delete_trigger()
+  IS 'Replicate reserve_out deletions into aggregation_tracking. This replaces an earlier use of an ON DELETE CASCADE that required a DEFERRABLE constraint and conflicted with nice partitioning.';
+
+
+CREATE FUNCTION master_table_wire_out()
+RETURNS void
+LANGUAGE plpgsql
+AS $$
+BEGIN
+  CREATE TRIGGER wire_out_on_delete
+    AFTER DELETE
+      ON wire_out
+     FOR EACH ROW EXECUTE FUNCTION wire_out_delete_trigger();
+END $$;
+
+
 INSERT INTO exchange_tables
     (name
     ,version
@@ -78,4 +118,14 @@ INSERT INTO exchange_tables
     ,'exchange-0002'
     ,'create'
     ,TRUE
+    ,FALSE),
+    ('wire_out'
+    ,'exchange-0002'
+    ,'constrain'
+    ,TRUE
+    ,FALSE),
+    ('wire_out'
+    ,'exchange-0002'
+    ,'master'
+    ,TRUE
     ,FALSE);
-- 
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