From 9580dd19c23e5591cc022dce717eca7bc745c5b0 Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Sun, 27 Nov 2022 00:16:00 +0100
Subject: intermediate step in major SQL refactoring (not done at all)

---
 src/exchangedb/0002-refunds.sql | 72 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 src/exchangedb/0002-refunds.sql

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

diff --git a/src/exchangedb/0002-refunds.sql b/src/exchangedb/0002-refunds.sql
new file mode 100644
index 000000000..daaae384d
--- /dev/null
+++ b/src/exchangedb/0002-refunds.sql
@@ -0,0 +1,72 @@
+CREATE OR REPLACE FUNCTION create_table_refunds(
+  IN shard_suffix VARCHAR DEFAULT NULL
+)
+RETURNS VOID
+LANGUAGE plpgsql
+AS $$
+DECLARE
+  table_name VARCHAR DEFAULT 'refunds';
+BEGIN
+  PERFORM create_partitioned_table(
+    'CREATE TABLE IF NOT EXISTS %I'
+      '(refund_serial_id BIGINT GENERATED BY DEFAULT AS IDENTITY' -- UNIQUE'
+      ',coin_pub BYTEA NOT NULL CHECK (LENGTH(coin_pub)=32)' -- REFERENCES known_coins (coin_pub) ON DELETE CASCADE
+      ',deposit_serial_id INT8 NOT NULL' -- REFERENCES deposits (deposit_serial_id) ON DELETE CASCADE'
+      ',merchant_sig BYTEA NOT NULL CHECK(LENGTH(merchant_sig)=64)'
+      ',rtransaction_id INT8 NOT NULL'
+      ',amount_with_fee_val INT8 NOT NULL'
+      ',amount_with_fee_frac INT4 NOT NULL'
+      -- ,PRIMARY KEY (deposit_serial_id, rtransaction_id) -- done per shard!
+    ') %s ;'
+    ,table_name
+    ,'PARTITION BY HASH (coin_pub)'
+    ,shard_suffix
+  );
+
+  table_name = concat_ws('_', table_name, shard_suffix);
+
+  EXECUTE FORMAT (
+    'CREATE INDEX IF NOT EXISTS ' || table_name || '_by_coin_pub_index '
+    'ON ' || table_name || ' '
+    '(coin_pub);'
+  );
+
+END
+$$;
+
+CREATE OR REPLACE FUNCTION constrain0002_table_refunds (
+  IN partition_suffix VARCHAR DEFAULT NULL
+)
+RETURNS void
+LANGUAGE plpgsql
+AS $$
+BEGIN
+  EXECUTE FORMAT (
+  -- FIXME: '_' issue if partition_suffix is NULL
+  -- => solve with general ALTER TABLE helper function!
+    'ALTER TABLE refunds_' || partition_suffix || ' '
+      'ADD CONSTRAINT refunds_' || partition_suffix || '_refund_serial_id_key '
+        'UNIQUE (refund_serial_id) '
+      ',ADD PRIMARY KEY (deposit_serial_id, rtransaction_id) '
+  );
+END
+$$;
+
+
+INSERT INTO exchange_tables
+    (name
+    ,version
+    ,action
+    ,partitioned
+    ,by_range)
+  VALUES
+    ('refunds'
+    ,'exchange-0002'
+    ,'create'
+    ,TRUE
+    ,FALSE),
+    ('refunds'
+    ,'exchange-0002'
+    ,'constrain0002'
+    ,TRUE
+    ,FALSE);
-- 
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