New spi files

10 files changed, 2030 insertions, 0 deletions

diff --git a/src/exchangedb/exchange_do_batch_coin_known.sql b/src/exchangedb/exchange_do_batch_coin_known.sql
new file mode 100644
index 000000000..38d795959
--- /dev/null
+++ b/src/exchangedb/exchange_do_batch_coin_known.sql
@@ -0,0 +1,477 @@
+--
+-- This file is part of TALER
+-- Copyright (C) 2014--2022 Taler Systems SA
+--
+-- TALER is free software; you can redistribute it and/or modify it under the
+-- terms of the GNU General Public License as published by the Free Software
+-- Foundation; either version 3, or (at your option) any later version.
+--
+-- TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+-- WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+-- A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License along with
+-- TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+--
+
+CREATE OR REPLACE FUNCTION exchange_do_batch4_known_coin(
+  IN in_coin_pub1 BYTEA,
+  IN in_denom_pub_hash1 BYTEA,
+  IN in_h_age_commitment1 BYTEA,
+  IN in_denom_sig1 BYTEA,
+  IN in_coin_pub2 BYTEA,
+  IN in_denom_pub_hash2 BYTEA,
+  IN in_h_age_commitment2 BYTEA,
+  IN in_denom_sig2 BYTEA,
+  IN in_coin_pub3 BYTEA,
+  IN in_denom_pub_hash3 BYTEA,
+  IN in_h_age_commitment3 BYTEA,
+  IN in_denom_sig3 BYTEA,
+  IN in_coin_pub4 BYTEA,
+  IN in_denom_pub_hash4 BYTEA,
+  IN in_h_age_commitment4 BYTEA,
+  IN in_denom_sig4 BYTEA,
+  OUT existed1 BOOLEAN,
+  OUT existed2 BOOLEAN,
+  OUT existed3 BOOLEAN,
+  OUT existed4 BOOLEAN,
+  OUT known_coin_id1 INT8,
+  OUT known_coin_id2 INT8,
+  OUT known_coin_id3 INT8,
+  OUT known_coin_id4 INT8,
+  OUT denom_pub_hash1 BYTEA,
+  OUT denom_pub_hash2 BYTEA,
+  OUT denom_pub_hash3 BYTEA,
+  OUT denom_pub_hash4 BYTEA,
+  OUT age_commitment_hash1 BYTEA,
+  OUT age_commitment_hash2 BYTEA,
+  OUT age_commitment_hash3 BYTEA,
+  OUT age_commitment_hash4 BYTEA)
+LANGUAGE plpgsql
+AS $$
+BEGIN
+WITH dd AS (
+SELECT
+  denominations_serial,
+  coin_val, coin_frac
+  FROM denominations
+    WHERE denom_pub_hash
+    IN
+     (in_denom_pub_hash1,
+      in_denom_pub_hash2,
+      in_denom_pub_hash3,
+      in_denom_pub_hash4)
+     ),--dd
+     input_rows AS (
+     VALUES
+      (in_coin_pub1,
+      in_denom_pub_hash1,
+      in_h_age_commitment1,
+      in_denom_sig1),
+      (in_coin_pub2,
+      in_denom_pub_hash2,
+      in_h_age_commitment2,
+      in_denom_sig2),
+      (in_coin_pub3,
+      in_denom_pub_hash3,
+      in_h_age_commitment3,
+      in_denom_sig3),
+      (in_coin_pub4,
+      in_denom_pub_hash4,
+      in_h_age_commitment4,
+      in_denom_sig4)
+      ),--ir
+      ins AS (
+      INSERT INTO known_coins (
+      coin_pub,
+      denominations_serial,
+      age_commitment_hash,
+      denom_sig,
+      remaining_val,
+      remaining_frac
+      )
+      SELECT
+        ir.coin_pub,
+        dd.denominations_serial,
+        ir.age_commitment_hash,
+        ir.denom_sig,
+        dd.coin_val,
+        dd.coin_frac
+        FROM input_rows ir
+        JOIN dd
+          ON dd.denom_pub_hash = ir.denom_pub_hash
+          ON CONFLICT DO NOTHING
+          RETURNING known_coin_id
+      ),--kc
+       exists AS (
+         SELECT
+         CASE
+           WHEN
+             ins.known_coin_id IS NOT NULL
+             THEN
+               FALSE
+             ELSE
+               TRUE
+         END AS existed,
+         ins.known_coin_id,
+         dd.denom_pub_hash,
+         kc.age_commitment_hash
+         FROM input_rows ir
+         LEFT JOIN ins
+           ON ins.coin_pub = ir.coin_pub
+         LEFT JOIN known_coins kc
+           ON kc.coin_pub = ir.coin_pub
+         LEFT JOIN dd
+           ON dd.denom_pub_hash = ir.denom_pub_hash
+         )--exists
+SELECT
+ exists.existed AS existed1,
+ exists.known_coin_id AS known_coin_id1,
+ exists.denom_pub_hash AS denom_pub_hash1,
+ exists.age_commitment_hash AS age_commitment_hash1,
+ (
+   SELECT exists.existed
+   FROM exists
+   WHERE exists.denom_pub_hash = in_denom_pub_hash2
+ ) AS existed2,
+ (
+   SELECT exists.known_coin_id
+   FROM exists
+   WHERE exists.denom_pub_hash = in_denom_pub_hash2
+ ) AS known_coin_id2,
+ (
+   SELECT exists.denom_pub_hash
+   FROM exists
+   WHERE exists.denom_pub_hash = in_denom_pub_hash2
+ ) AS denom_pub_hash2,
+ (
+   SELECT exists.age_commitment_hash
+   FROM exists
+   WHERE exists.denom_pub_hash = in_denom_pub_hash2
+ )AS age_commitment_hash2,
+ (
+   SELECT exists.existed
+   FROM exists
+   WHERE exists.denom_pub_hash = in_denom_pub_hash3
+ ) AS existed3,
+ (
+   SELECT exists.known_coin_id
+   FROM exists
+   WHERE exists.denom_pub_hash = in_denom_pub_hash3
+ ) AS known_coin_id3,
+ (
+   SELECT exists.denom_pub_hash
+   FROM exists
+   WHERE exists.denom_pub_hash = in_denom_pub_hash3
+ ) AS denom_pub_hash3,
+ (
+   SELECT exists.age_commitment_hash
+   FROM exists
+   WHERE exists.denom_pub_hash = in_denom_pub_hash3
+ )AS age_commitment_hash3,
+ (
+   SELECT exists.existed
+   FROM exists
+   WHERE exists.denom_pub_hash = in_denom_pub_hash4
+ ) AS existed4,
+ (
+   SELECT exists.known_coin_id
+   FROM exists
+   WHERE exists.denom_pub_hash = in_denom_pub_hash4
+ ) AS known_coin_id4,
+ (
+   SELECT exists.denom_pub_hash
+   FROM exists
+   WHERE exists.denom_pub_hash = in_denom_pub_hash4
+ ) AS denom_pub_hash4,
+ (
+   SELECT exists.age_commitment_hash
+   FROM exists
+   WHERE exists.denom_pub_hash = in_denom_pub_hash4
+ )AS age_commitment_hash4
+FROM exists;
+
+RETURN;
+END $$;
+
+
+CREATE OR REPLACE FUNCTION exchange_do_batch2_known_coin(
+  IN in_coin_pub1 BYTEA,
+  IN in_denom_pub_hash1 BYTEA,
+  IN in_h_age_commitment1 BYTEA,
+  IN in_denom_sig1 BYTEA,
+  IN in_coin_pub2 BYTEA,
+  IN in_denom_pub_hash2 BYTEA,
+  IN in_h_age_commitment2 BYTEA,
+  IN in_denom_sig2 BYTEA,
+  OUT existed1 BOOLEAN,
+  OUT existed2 BOOLEAN,
+  OUT known_coin_id1 INT8,
+  OUT known_coin_id2 INT8,
+  OUT denom_pub_hash1 BYTEA,
+  OUT denom_pub_hash2 BYTEA,
+  OUT age_commitment_hash1 BYTEA,
+  OUT age_commitment_hash2 BYTEA)
+LANGUAGE plpgsql
+AS $$
+BEGIN
+WITH dd AS (
+SELECT
+  denominations_serial,
+  coin_val, coin_frac
+  FROM denominations
+    WHERE denom_pub_hash
+    IN
+     (in_denom_pub_hash1,
+      in_denom_pub_hash2)
+     ),--dd
+     input_rows AS (
+     VALUES
+      (in_coin_pub1,
+      in_denom_pub_hash1,
+      in_h_age_commitment1,
+      in_denom_sig1),
+      (in_coin_pub2,
+      in_denom_pub_hash2,
+      in_h_age_commitment2,
+      in_denom_sig2)
+      ),--ir
+      ins AS (
+      INSERT INTO known_coins (
+      coin_pub,
+      denominations_serial,
+      age_commitment_hash,
+      denom_sig,
+      remaining_val,
+      remaining_frac
+      )
+      SELECT
+        ir.coin_pub,
+        dd.denominations_serial,
+        ir.age_commitment_hash,
+        ir.denom_sig,
+        dd.coin_val,
+        dd.coin_frac
+        FROM input_rows ir
+        JOIN dd
+          ON dd.denom_pub_hash = ir.denom_pub_hash
+          ON CONFLICT DO NOTHING
+          RETURNING known_coin_id
+      ),--kc
+       exists AS (
+       SELECT
+        CASE
+          WHEN ins.known_coin_id IS NOT NULL
+          THEN
+            FALSE
+          ELSE
+            TRUE
+        END AS existed,
+        ins.known_coin_id,
+        dd.denom_pub_hash,
+        kc.age_commitment_hash
+        FROM input_rows ir
+        LEFT JOIN ins
+          ON ins.coin_pub = ir.coin_pub
+        LEFT JOIN known_coins kc
+          ON kc.coin_pub = ir.coin_pub
+        LEFT JOIN dd
+          ON dd.denom_pub_hash = ir.denom_pub_hash
+     )--exists
+SELECT
+ exists.existed AS existed1,
+ exists.known_coin_id AS known_coin_id1,
+ exists.denom_pub_hash AS denom_pub_hash1,
+ exists.age_commitment_hash AS age_commitment_hash1,
+ (
+   SELECT exists.existed
+   FROM exists
+   WHERE exists.denom_pub_hash = in_denom_pub_hash2
+ ) AS existed2,
+ (
+   SELECT exists.known_coin_id
+   FROM exists
+   WHERE exists.denom_pub_hash = in_denom_pub_hash2
+ ) AS known_coin_id2,
+ (
+   SELECT exists.denom_pub_hash
+   FROM exists
+   WHERE exists.denom_pub_hash = in_denom_pub_hash2
+ ) AS denom_pub_hash2,
+ (
+   SELECT exists.age_commitment_hash
+   FROM exists
+   WHERE exists.denom_pub_hash = in_denom_pub_hash2
+ )AS age_commitment_hash2
+FROM exists;
+
+RETURN;
+END $$;
+
+
+CREATE OR REPLACE FUNCTION exchange_do_batch1_known_coin(
+  IN in_coin_pub1 BYTEA,
+  IN in_denom_pub_hash1 BYTEA,
+  IN in_h_age_commitment1 BYTEA,
+  IN in_denom_sig1 BYTEA,
+  OUT existed1 BOOLEAN,
+  OUT known_coin_id1 INT8,
+  OUT denom_pub_hash1 BYTEA,
+  OUT age_commitment_hash1 BYTEA)
+LANGUAGE plpgsql
+AS $$
+BEGIN
+WITH dd AS (
+SELECT
+  denominations_serial,
+  coin_val, coin_frac
+  FROM denominations
+    WHERE denom_pub_hash
+    IN
+     (in_denom_pub_hash1,
+      in_denom_pub_hash2)
+     ),--dd
+     input_rows AS (
+     VALUES
+      (in_coin_pub1,
+      in_denom_pub_hash1,
+      in_h_age_commitment1,
+      in_denom_sig1)
+      ),--ir
+      ins AS (
+      INSERT INTO known_coins (
+      coin_pub,
+      denominations_serial,
+      age_commitment_hash,
+      denom_sig,
+      remaining_val,
+      remaining_frac
+      )
+      SELECT
+        ir.coin_pub,
+        dd.denominations_serial,
+        ir.age_commitment_hash,
+        ir.denom_sig,
+        dd.coin_val,
+        dd.coin_frac
+        FROM input_rows ir
+        JOIN dd
+          ON dd.denom_pub_hash = ir.denom_pub_hash
+          ON CONFLICT DO NOTHING
+          RETURNING known_coin_id
+      ),--kc
+       exists AS (
+       SELECT
+        CASE
+          WHEN ins.known_coin_id IS NOT NULL
+          THEN
+            FALSE
+          ELSE
+            TRUE
+        END AS existed,
+        ins.known_coin_id,
+        dd.denom_pub_hash,
+        kc.age_commitment_hash
+        FROM input_rows ir
+        LEFT JOIN ins
+          ON ins.coin_pub = ir.coin_pub
+        LEFT JOIN known_coins kc
+          ON kc.coin_pub = ir.coin_pub
+        LEFT JOIN dd
+          ON dd.denom_pub_hash = ir.denom_pub_hash
+       )--exists
+SELECT
+ exists.existed AS existed1,
+ exists.known_coin_id AS known_coin_id1,
+ exists.denom_pub_hash AS denom_pub_hash1,
+ exists.age_commitment_hash AS age_commitment_hash1
+FROM exists;
+
+RETURN;
+END $$;
+
+/*** THIS SQL CODE WORKS ***/
+/*
+CREATE OR REPLACE FUNCTION exchange_do_batch2_known_coin(
+  IN in_coin_pub1 BYTEA,
+  IN in_denom_pub_hash1 TEXT,
+  IN in_h_age_commitment1 TEXT,
+  IN in_denom_sig1 TEXT,
+  IN in_coin_pub2 BYTEA,
+  IN in_denom_pub_hash2 TEXT,
+  IN in_h_age_commitment2 TEXT,
+  IN in_denom_sig2 TEXT,
+  OUT existed1 BOOLEAN,
+  OUT existed2 BOOLEAN,
+  OUT known_coin_id1 INT8,
+  OUT known_coin_id2 INT8,
+  OUT denom_pub_hash1 TEXT,
+  OUT denom_pub_hash2 TEXT,
+  OUT age_commitment_hash1 TEXT,
+  OUT age_commitment_hash2 TEXT)
+LANGUAGE plpgsql
+AS $$
+DECLARE
+  ins_values RECORD;
+BEGIN
+  FOR i IN 1..2 LOOP
+    ins_values := (
+      SELECT
+        in_coin_pub1 AS coin_pub,
+        in_denom_pub_hash1 AS denom_pub_hash,
+        in_h_age_commitment1 AS age_commitment_hash,
+        in_denom_sig1 AS denom_sig
+      WHERE i = 1
+      UNION
+      SELECT
+        in_coin_pub2 AS coin_pub,
+        in_denom_pub_hash2 AS denom_pub_hash,
+        in_h_age_commitment2 AS age_commitment_hash,
+        in_denom_sig2 AS denom_sig
+      WHERE i = 2
+    );
+    WITH dd (denominations_serial, coin_val, coin_frac) AS (
+      SELECT denominations_serial, coin_val, coin_frac
+      FROM denominations
+      WHERE denom_pub_hash = ins_values.denom_pub_hash
+    ),
+    input_rows(coin_pub) AS (
+      VALUES (ins_values.coin_pub)
+    ),
+    ins AS (
+      INSERT INTO known_coins (
+        coin_pub,
+        denominations_serial,
+        age_commitment_hash,
+        denom_sig,
+        remaining_val,
+        remaining_frac
+      ) SELECT
+        input_rows.coin_pub,
+        dd.denominations_serial,
+        ins_values.age_commitment_hash,
+        ins_values.denom_sig,
+        coin_val,
+        coin_frac
+      FROM dd
+      CROSS JOIN input_rows
+      ON CONFLICT DO NOTHING
+      RETURNING known_coin_id, denom_pub_hash
+    )
+    SELECT
+      CASE i
+        WHEN 1 THEN
+          COALESCE(ins.known_coin_id, 0) <> 0 AS existed1,
+          ins.known_coin_id AS known_coin_id1,
+          ins.denom_pub_hash AS denom_pub_hash1,
+          ins.age_commitment_hash AS age_commitment_hash1
+        WHEN 2 THEN
+          COALESCE(ins.known_coin_id, 0) <> 0 AS existed2,
+          ins.known_coin_id AS known_coin_id2,
+          ins.denom_pub_hash AS denom_pub_hash2,
+          ins.age_commitment_hash AS age_commitment_hash2
+      END
+    FROM ins;
+  END LOOP;
+END;
+$$;*/
diff --git a/src/exchangedb/exchange_get_ready_deposit.sql b/src/exchangedb/exchange_get_ready_deposit.sql
new file mode 100644
index 000000000..4f76463fc
--- /dev/null
+++ b/src/exchangedb/exchange_get_ready_deposit.sql
@@ -0,0 +1,60 @@
+--
+-- This file is part of TALER
+-- Copyright (C) 2014--2022 Taler Systems SA
+--
+-- TALER is free software; you can redistribute it and/or modify it under the
+-- terms of the GNU General Public License as published by the Free Software
+-- Foundation; either version 3, or (at your option) any later version.
+--
+-- TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+-- WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+-- A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License along with
+-- TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+--
+CREATE OR REPLACE FUNCTION exchange_do_get_ready_deposit(
+  IN in_now INT8,
+  IN in_start_shard_now INT8,
+  IN in_end_shard_now INT8,
+  OUT out_payto_uri VARCHAR,
+  OUT out_merchant_pub BYTEA
+)
+LANGUAGE plpgsql
+AS $$
+DECLARE
+  curs CURSOR
+  FOR
+  SELECT
+    coin_pub
+   ,deposit_serial_id
+   ,wire_deadline
+   ,shard
+  FROM deposits_by_ready dbr
+  WHERE wire_deadline <= in_now
+  AND shard >= in_start_shard_now
+  AND shard <=in_end_shard_now
+  ORDER BY
+     wire_deadline ASC
+    ,shard ASC
+  LIMIT 1;
+DECLARE
+  i RECORD;
+BEGIN
+OPEN curs;
+FETCH FROM curs INTO i;
+SELECT
+   payto_uri
+  ,merchant_pub
+  INTO
+   out_payto_uri
+  ,out_merchant_pub
+  FROM deposits
+  JOIN wire_targets wt
+  USING (wire_target_h_payto)
+  WHERE
+  i.coin_pub = coin_pub
+  AND i.deposit_serial_id=deposit_serial_id;
+CLOSE curs;
+RETURN;
+END $$;
diff --git a/src/exchangedb/spi/README.md b/src/exchangedb/spi/README.md
new file mode 100644
index 000000000..ec6a9016a
--- /dev/null
+++ b/src/exchangedb/spi/README.md
@@ -0,0 +1,41 @@
+                           Server Programming Interface (SPI)
+
+
+Dependencies:
+=============
+
+These are the direct dependencies for running SPI functions :
+
+
+
+Step 1:
+"postgresql-server-dev-<depends on your postgresql version>"
+-- sudo apt-get install libpq-dev postgresql-server-dev-13
+
+Step 2:
+To solve gssapi/gssapi.h, use the following command:
+apt-get install libkrb5-dev
+
+Step 3:
+apt-cache search openssl | grep -- -dev
+apt-get install libssl-dev
+
+Compile:
+========
+gcc -shared -o <file_name>.so <file_name>.c
+
+CALL FUNCTIONS:
+===============
+
+psql -c "SELECT <function_name>();" db_name
+
+Structure:
+==========
+
+usr/include/postgres/
+
+usr/include/postgres/13/server/
+
+make
+make install
+psql
\ No newline at end of file
diff --git a/src/exchangedb/spi/own_test.bc b/src/exchangedb/spi/own_test.bc
new file mode 100644
index 000000000..240c78cf4
--- /dev/null
+++ b/src/exchangedb/spi/own_test.bc
diff --git a/src/exchangedb/spi/own_test.c b/src/exchangedb/spi/own_test.c
new file mode 100644
index 000000000..04798bfa7
--- /dev/null
+++ b/src/exchangedb/spi/own_test.c
@@ -0,0 +1,818 @@
+#include "postgres.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <libpq-fe.h>
+#include <internal/libpq-int.h>
+#include <catalog/pg_type.h>
+#include <executor/spi.h>
+#include <funcapi.h>
+#include <fmgr.h>
+#include <utils/builtins.h>
+#include "utils/array.h"
+#include <sys/time.h>
+#include "utils/numeric.h"
+#include "utils/timestamp.h"
+#include <utils/bytea.h>
+
+#ifdef PG_MODULE_MAGIC
+PG_MODULE_MAGIC;
+#endif
+
+typedef struct {
+  Datum col1;
+  Datum col2;
+} valuest;
+
+void _PG_init(void);
+void _PG_fini(void);
+
+void _PG_init(void)
+{
+}
+
+PG_FUNCTION_INFO_V1(pg_spi_insert_int);
+PG_FUNCTION_INFO_V1(pg_spi_select_from_x);
+PG_FUNCTION_INFO_V1(pg_spi_select_pair_from_y);
+//PG_FUNCTION_INFO_V1(pg_spi_select_with_cond);
+PG_FUNCTION_INFO_V1(pg_spi_update_y);
+PG_FUNCTION_INFO_V1(pg_spi_prepare_example);
+PG_FUNCTION_INFO_V1(pg_spi_prepare_example_without_saveplan);
+PG_FUNCTION_INFO_V1(pg_spi_prepare_insert);
+PG_FUNCTION_INFO_V1(pg_spi_prepare_insert_without_saveplan);
+//PG_FUNCTION_INFO_V1(pg_spi_prepare_select_with_cond);
+PG_FUNCTION_INFO_V1(pg_spi_prepare_select_with_cond_without_saveplan);
+PG_FUNCTION_INFO_V1(pg_spi_prepare_update);
+PG_FUNCTION_INFO_V1(pg_spi_get_dep_ref_fees);
+// SIMPLE SELECT
+Datum
+pg_spi_prepare_example(PG_FUNCTION_ARGS)
+{
+  static SPIPlanPtr prepared_plan;
+  int ret;
+  int64 result;
+  char * value;
+  SPIPlanPtr new_plan;
+
+  ret=SPI_connect();
+  if (ret != SPI_OK_CONNECT) {
+    elog(ERROR, "DB connexion failed ! \n");
+  }
+  {
+    if (prepared_plan == NULL)
+    {
+      new_plan = SPI_prepare("SELECT 1 FROM joseph_test.X", 0, NULL);
+      prepared_plan = SPI_saveplan(new_plan);
+
+      if (prepared_plan == NULL)
+      {
+        elog(ERROR, "FAIL TO SAVE !\n");
+      }
+    }
+
+    ret = SPI_execute_plan(prepared_plan, NULL, 0,false, 0);
+    if (ret != SPI_OK_SELECT) {
+      elog(ERROR, "SELECT FAILED %d !\n", ret);
+    }
+
+    if (SPI_tuptable != NULL && SPI_tuptable->vals != NULL && SPI_tuptable->tupdesc != NULL)
+    {
+      value = SPI_getvalue(SPI_tuptable->vals[0], SPI_tuptable->tupdesc, 1);
+      result = atoi(value);
+    }
+    else
+    {
+      elog(ERROR, "EMPTY TABLE !\n");
+    }
+  }
+  SPI_finish();
+  PG_RETURN_INT64(result);
+}
+
+
+
+Datum
+pg_spi_prepare_example_without_saveplan(PG_FUNCTION_ARGS)
+{
+  int ret;
+  int64 result;
+  char * value;
+  SPIPlanPtr new_plan;
+
+  ret=SPI_connect();
+  if (ret != SPI_OK_CONNECT) {
+    elog(ERROR, "DB connexion failed ! \n");
+  }
+
+  {
+    new_plan = SPI_prepare("SELECT 1 FROM joseph_test.X", 0, NULL);
+    ret = SPI_execute_plan(new_plan, NULL, 0,false, 0);
+    if (ret != SPI_OK_SELECT) {
+      elog(ERROR, "SELECT FAILED %d !\n", ret);
+    }
+
+    if (SPI_tuptable != NULL
+        && SPI_tuptable->vals != NULL
+        && SPI_tuptable->tupdesc != NULL)
+    {
+      value = SPI_getvalue(SPI_tuptable->vals[0], SPI_tuptable->tupdesc, 1);
+      result = atoi(value);
+    }
+    else
+    {
+      elog(ERROR, "EMPTY TABLE !\n");
+    }
+  }
+  SPI_finish();
+  PG_RETURN_INT64(result);//  PG_RETURN_INT64(result);
+}
+
+
+//SELECT 1 FROM X
+//V1
+Datum
+pg_spi_select_from_x(PG_FUNCTION_ARGS)
+{
+  int ret;
+  char *query = "SELECT 1 FROM joseph_test.X";
+  uint64 proc;
+  ret = SPI_connect();
+
+  if (ret != SPI_OK_CONNECT)
+  {
+    elog(ERROR, "SPI_connect failed");
+  }
+
+  ret = SPI_exec(query, 10);
+  proc = SPI_processed;
+  if (ret != SPI_OK_SELECT)
+  {
+    elog(ERROR, "SPI_exec failed");
+  }
+
+  SPI_finish();
+
+  PG_RETURN_INT64(proc);
+}
+
+//INSERT INTO X VALUES (1)
+Datum
+pg_spi_insert_int(PG_FUNCTION_ARGS)
+{
+  int ret;
+  int nargs;
+  Oid argtypes[1];
+  Datum values[1];
+  char *query = "INSERT INTO joseph_test.X (a) VALUES ($1)";
+
+  ret = SPI_connect();
+  if (ret != SPI_OK_CONNECT)
+  {
+    elog(ERROR, "SPI_connect failed");
+  }
+
+  nargs = 1;
+  argtypes[0] = INT4OID;
+  values[0] = Int32GetDatum(3);
+
+  ret = SPI_execute_with_args(query, nargs, argtypes, values, NULL, false, 0);
+  if (ret != SPI_OK_INSERT)
+  {
+    elog(ERROR, "SPI_execute_with_args failed");
+  }
+
+  SPI_finish();
+
+  PG_RETURN_VOID();
+}
+
+
+Datum
+pg_spi_prepare_insert(PG_FUNCTION_ARGS)
+{
+  static SPIPlanPtr prepared_plan = NULL;
+  int ret;
+  int nargs;
+  Oid argtypes[1];
+  Datum values[1];
+  char *query = "INSERT INTO joseph_test.X (a) VALUES ($1)";
+  SPIPlanPtr new_plan;
+  ret = SPI_connect();
+  if (ret != SPI_OK_CONNECT)
+  {
+    elog(ERROR, "SPI_connect failed ! \n");
+  }
+  if (prepared_plan == NULL) {
+
+    argtypes[0] = INT4OID;
+    nargs = 1;
+    values[0] = Int32GetDatum(3);
+    new_plan = SPI_prepare(query, nargs, argtypes);
+    if (new_plan== NULL)
+    {
+      elog(ERROR, "SPI_prepare failed ! \n");
+    }
+    prepared_plan = SPI_saveplan(new_plan);
+    if (prepared_plan == NULL)
+    {
+      elog(ERROR, "SPI_saveplan failed ! \n");
+    }
+  }
+
+  ret = SPI_execute_plan(prepared_plan, values, NULL, false, 0);
+  if (ret != SPI_OK_INSERT)
+  {
+    elog(ERROR, "SPI_execute_plan failed ! \n");
+  }
+
+  SPI_finish();
+
+  PG_RETURN_VOID();
+}
+/*
+Datum
+pg_spi_prepare_insert_bytea(PG_FUNCTION_ARGS)
+{
+  static SPIPlanPtr prepared_plan = NULL;
+  int ret;
+  int nargs;
+  Oid argtypes[1];
+  Datum values[1];
+  Oid argtypes2[1];
+  Datum val[1];
+  char *query = "INSERT INTO joseph_test.X (a) VALUES ($1)";
+  SPIPlanPtr new_plan;
+  ret = SPI_connect();
+  if (ret != SPI_OK_CONNECT)
+  {
+    elog(ERROR, "SPI_connect failed ! \n");
+  }
+  if (prepared_plan == NULL) {
+    argtypes2[0] = BOOLOID;
+    val[0] = BoolGetDatum();
+    argtypes[0] = BYTEAOID;
+    nargs = 1;
+    values[0] = Int32GetDatum(3);
+    new_plan = SPI_prepare(query, nargs, argtypes);
+    if (new_plan== NULL)
+    {
+      elog(ERROR, "SPI_prepare failed ! \n");
+    }
+    prepared_plan = SPI_saveplan(new_plan);
+    if (prepared_plan == NULL)
+    {
+      elog(ERROR, "SPI_saveplan failed ! \n");
+    }
+  }
+
+  ret = SPI_execute_plan(prepared_plan, values, NULL, false, 0);
+  if (ret != SPI_OK_INSERT)
+  {
+    elog(ERROR, "SPI_execute_plan failed ! \n");
+  }
+
+  SPI_finish();
+
+  PG_RETURN_VOID();
+}
+*/
+
+Datum
+pg_spi_prepare_insert_without_saveplan(PG_FUNCTION_ARGS)
+{
+  int ret;
+  int nargs;
+  Oid argtypes[1];
+  Datum values[1];
+  char *query = "INSERT INTO joseph_test.X (a) VALUES ($1)";
+  SPIPlanPtr new_plan;
+  ret = SPI_connect();
+  if (ret != SPI_OK_CONNECT)
+  {
+    elog(ERROR, "SPI_connect failed");
+  }
+  {
+    argtypes[0] = INT4OID;
+    nargs = 1;
+    values[0] = Int32GetDatum(3);
+    new_plan = SPI_prepare(query, nargs, argtypes);
+    if (new_plan== NULL)
+    {
+      elog(ERROR, "SPI_prepare failed");
+    }
+  }
+
+  ret = SPI_execute_plan(new_plan, values, NULL, false, 0);
+  if (ret != SPI_OK_INSERT)
+  {
+    elog(ERROR, "SPI_execute_plan failed");
+  }
+
+  SPI_finish();
+
+  PG_RETURN_VOID();
+}
+
+
+
+
+
+
+/*
+Datum
+pg_spi_select_pair_from_y(PG_FUNCTION_ARGS)
+{
+  int ret;
+  valuest result;
+  bool isnull;
+  char *query = "SELECT 1,1 FROM joseph_test.Y";
+  result.col1 = 0;
+  result.col2 = 0;
+
+  if ((ret = SPI_connect()) < 0) {
+    fprintf(stderr, "SPI_connect returned %d\n", ret);
+    exit(1);
+  }
+  ret = SPI_exec(query, 0);
+  if (ret == SPI_OK_SELECT && SPI_processed > 0) {
+    int i;
+    SPITupleTable *tuptable = SPI_tuptable;
+    TupleDesc tupdesc = tuptable->tupdesc;
+    for (i = 0; i < SPI_processed; i++) {
+      HeapTuple tuple = tuptable->vals[i];
+      result.col1 = SPI_getbinval(tuple, tupdesc, 1, &isnull);
+      result.col2 = SPI_getbinval(tuple, tupdesc, 2, &isnull);
+    }
+  }
+  SPI_finish();
+  PG_RETURN_TEXT_P(result);
+}
+*/
+
+//SELECT X FROM Y WHERE Z=$1
+/*
+Datum
+pg_spi_select_with_cond(PG_FUNCTION_ARGS)
+{
+    int ret;
+    char *query;
+    int nargs;
+    Oid argtypes[1];
+    Datum values[1];
+    uint64 proc;
+    query = "SELECT col1 FROM joseph_test.Y WHERE col2 = $1";
+
+    ret = SPI_connect();
+    if (ret != SPI_OK_CONNECT) {
+        elog(ERROR, "SPI_connect failed: %d", ret);
+    }
+    nargs = 1;
+    argtypes[0] = INT4OID;
+    values[0] = Int32GetDatum(2);
+
+    ret = SPI_execute_with_args(query, nargs, argtypes, values, NULL, false, 0);
+    proc = SPI_processed;
+    if (ret != SPI_OK_SELECT)
+    {
+      elog(ERROR, "SPI_execute_with_args failed");
+    }
+
+    SPI_finish();
+
+
+    PG_RETURN_INT64(proc);
+    }*/
+
+////////SELECT WITH COND
+/*
+Datum pg_spi_prepare_select_with_cond(PG_FUNCTION_ARGS) {
+  static SPIPlanPtr prepared_plan = NULL;
+  SPIPlanPtr new_plan;
+  int ret;
+  Datum values[1];
+  uint64 proc;
+  int nargs;
+  Oid argtypes[1];
+  char *query = "SELECT col1 FROM joseph_test.Y WHERE col1 = $1";
+  int result = 0;
+
+  ret = SPI_connect();
+  if (ret != SPI_OK_CONNECT)
+    elog(ERROR, "SPI_connect failed ! \n");
+
+  if (prepared_plan == NULL) {
+
+    argtypes[0] = INT4OID;
+    nargs = 1;
+    values[0] = DatumGetByteaP(SPI_getbinval(tuptable->vals[0], tupdesc, 1, &isnull)); //Value col2
+
+    new_plan = SPI_prepare(query, nargs, argtypes);
+    if (new_plan == NULL)
+      elog(ERROR, "SPI_prepare failed ! \n");
+
+    prepared_plan = SPI_saveplan(new_plan);
+    if (prepared_plan == NULL)
+      elog(ERROR, "SPI_saveplan failed ! \n");
+  }
+
+
+  ret = SPI_execute_plan(prepared_plan, values, NULL, false, 0);
+
+  if (ret != SPI_OK_SELECT) {
+    elog(ERROR, "SPI_execute_plan failed: %d \n", ret);
+    }
+
+  proc = SPI_processed;
+
+  if (proc > 0) {
+    SPITupleTable *tuptable = SPI_tuptable;
+    TupleDesc tupdesc = tuptable->tupdesc;
+    HeapTuple tuple;
+    int i;
+
+    for (i = 0; i < proc; i++) {
+      tuple = tuptable->vals[i];
+      for (int j = 1; j <= tupdesc->natts; j++) {
+        char * value = SPI_getvalue(tuple, tupdesc, j);
+        result += atoi(value);
+      }
+    }
+    }
+  SPI_finish();
+  PG_RETURN_INT64(result);
+}
+*/
+
+Datum pg_spi_prepare_select_with_cond_without_saveplan(PG_FUNCTION_ARGS) {
+
+  SPIPlanPtr new_plan;
+  int ret;
+  Datum values[1];
+  uint64 proc;
+  int nargs;
+  Oid argtypes[1];
+  char *query = "SELECT col1 FROM joseph_test.Y WHERE col2 = $1";
+  int result = 0;
+
+  ret = SPI_connect();
+  if (ret != SPI_OK_CONNECT)
+    elog(ERROR, "SPI_connect failed ! \n");
+
+  {
+
+    argtypes[0] = INT4OID;
+    nargs = 1;
+    values[0] = Int32GetDatum(2); //Value col2
+
+    new_plan = SPI_prepare(query, nargs, argtypes);
+    if (new_plan == NULL)
+      elog(ERROR, "SPI_prepare failed ! \n");
+
+  }
+
+
+  ret = SPI_execute_plan(new_plan, values, NULL, false, 0);
+
+  if (ret != SPI_OK_SELECT) {
+    elog(ERROR, "SPI_execute_plan failed: %d \n", ret);
+    }
+
+  proc = SPI_processed;
+
+  if (proc > 0) {
+    SPITupleTable *tuptable = SPI_tuptable;
+    TupleDesc tupdesc = tuptable->tupdesc;
+    HeapTuple tuple;
+    int i;
+
+    for (i = 0; i < proc; i++) {
+      tuple = tuptable->vals[i];
+      for (int j = 1; j <= tupdesc->natts; j++) {
+        char * value = SPI_getvalue(tuple, tupdesc, j);
+        result += atoi(value);
+      }
+    }
+  }
+  SPI_finish();
+  PG_RETURN_INT64(result);
+}
+
+
+
+
+Datum
+pg_spi_update_y(PG_FUNCTION_ARGS)
+{
+  int ret;
+  int nargs;
+  Oid argtypes[1];
+  Datum values[1];
+  char *query = "UPDATE joseph_test.Y SET col1 = 4 WHERE (col2 = $1)";
+
+  ret = SPI_connect();
+  if (ret != SPI_OK_CONNECT)
+  {
+    elog(ERROR, "SPI_connect failed ! \n");
+  }
+
+  nargs = 1;
+  argtypes[0] = INT4OID;
+  values[0] = Int32GetDatum(0);
+
+  ret = SPI_execute_with_args(query, nargs, argtypes, values, NULL, false, 0);
+  if (ret != SPI_OK_UPDATE)
+  {
+    elog(ERROR, "SPI_execute_with_args failed ! \n");
+  }
+
+  SPI_finish();
+
+  PG_RETURN_VOID();
+}
+
+Datum
+pg_spi_prepare_update(PG_FUNCTION_ARGS)
+{
+  static SPIPlanPtr prepared_plan = NULL;
+  SPIPlanPtr new_plan;
+  int ret;
+  int nargs;
+  Oid argtypes[1];
+  Datum values[1];
+  char *query = "UPDATE joseph_test.Y SET col1 = 4 WHERE (col2 = $1)";
+
+  ret = SPI_connect();
+  if (ret != SPI_OK_CONNECT)
+  {
+    elog(ERROR, "SPI_connect failed ! \n");
+  }
+
+  if ( prepared_plan == NULL)
+  {
+    argtypes[0] = INT4OID;
+    nargs = 1;
+    values[0] = Int32GetDatum(3);
+    //PREPARE
+    new_plan = SPI_prepare(query, nargs, argtypes);
+    if (new_plan == NULL)
+      elog(ERROR, "SPI_prepare failed ! \n");
+    //SAVEPLAN
+    prepared_plan = SPI_saveplan(new_plan);
+    if(prepared_plan == NULL)
+      elog(ERROR, "SPI_saveplan failed ! \n");
+  }
+  ret = SPI_execute_plan(prepared_plan, values, NULL, false, 0);
+  if (ret != SPI_OK_UPDATE)
+    elog(ERROR, "SPI_execute_plan failed ! \n");
+
+  SPI_finish();
+  PG_RETURN_VOID();
+}
+/*
+Datum
+pg_spi_prepare_update_without_saveplan(PG_FUNCTION_ARGS)
+{}*/
+void _PG_fini(void)
+{
+}
+
+/*
+
+*/
+
+Datum
+pg_spi_get_dep_ref_fees (PG_FUNCTION_ARGS) {
+  /* Define plan to save */
+  static SPIPlanPtr deposit_plan;
+  static SPIPlanPtr ref_plan;
+  static SPIPlanPtr fees_plan;
+  static SPIPlanPtr dummy_plan;
+  /* Define variables to update */
+  Timestamp refund_deadline = PG_GETARG_TIMESTAMP(0);
+  bytea *merchant_pub = PG_GETARG_BYTEA_P(1);
+  bytea *wire_target_h_payto = PG_GETARG_BYTEA_P(2);
+  bytea *wtid_raw = PG_GETARG_BYTEA_P(3);
+  bool is_null;
+  /* Define variables to store the results of each SPI query */
+  uint64_t sum_deposit_val  = 0;
+  uint32_t sum_deposit_frac = 0;
+  uint64_t s_refund_val     = 0;
+  uint32_t s_refund_frac    = 0;
+  uint64_t sum_dep_fee_val  = 0;
+  uint32_t sum_dep_fee_frac = 0;
+  uint64_t norm_refund_val  = 0;
+  uint32_t norm_refund_frac = 0;
+  uint64_t sum_refund_val   = 0;
+  uint32_t sum_refund_frac  = 0;
+  /* Define variables to store the Tuptable */
+  SPITupleTable *dep_res;
+  SPITupleTable *ref_res;
+  SPITupleTable *ref_by_coin_res;
+  SPITupleTable *norm_ref_by_coin_res;
+  SPITupleTable *fully_refunded_coins_res;
+  SPITupleTable *fees_res;
+  SPITupleTable *dummys_res;
+  /* Define variable to update */
+  Datum values_refund[2];
+  Datum values_deposit[3];
+  Datum values_fees[2];
+  Datum values_dummys[2];
+  TupleDesc tupdesc;
+  /* Define variables to replace some tables */
+  bytea *ref_by_coin_coin_pub;
+  int64 ref_by_coin_deposit_serial_id = 0;
+  bytea *norm_ref_by_coin_coin_pub;
+  int64_t norm_ref_by_coin_deposit_serial_id = 0;
+  bytea *new_dep_coin_pub = NULL;
+  int res = SPI_connect();
+
+  /* Connect to SPI */
+  if (res < 0) {
+    elog(ERROR, "Could not connect to SPI manager");
+  }
+  if (deposit_plan == NULL)
+  {
+    const char *dep_sql;
+    SPIPlanPtr new_plan;
+
+    // Execute first query and store results in variables
+    dep_sql =
+      "UPDATE deposits SET done=TRUE "
+      "WHERE NOT (done OR policy_blocked) "
+      "AND refund_deadline=$1 "
+      "AND merchant_pub=$2 "
+      "AND wire_target_h_payto=$3 "
+      "RETURNING "
+      "deposit_serial_id,"
+      "coin_pub,"
+      "amount_with_fee_val,"
+      "amount_with_fee_frac;";
+    fprintf(stderr, "dep sql %d\n", 1);
+    new_plan =
+      SPI_prepare(dep_sql, 4,(Oid[]){INT8OID, BYTEAOID, BYTEAOID});
+    fprintf(stderr, "dep sql %d\n", 2);
+    if (new_plan == NULL)
+      elog(ERROR, "SPI_prepare failed for dep \n");
+    deposit_plan = SPI_saveplan(new_plan);
+    if (deposit_plan == NULL)
+      elog(ERROR, "SPI_saveplan failed for dep \n");
+  }
+  fprintf(stdout, "dep sql %d\n", 3);
+
+  values_deposit[0] = Int64GetDatum(refund_deadline);
+  values_deposit[1] = PointerGetDatum(merchant_pub);
+  values_deposit[2] = PointerGetDatum(wire_target_h_payto);
+
+  res = SPI_execute_plan (deposit_plan,
+                          values_deposit,
+                          NULL,
+                          true,
+                          0);
+  fprintf(stdout, "dep sql %d\n", 4);
+  if (res != SPI_OK_UPDATE)
+  {
+    elog(ERROR, "Failed to execute subquery 1 \n");
+  }
+  // STORE TUPTABLE deposit
+  dep_res = SPI_tuptable;
+
+  for (unsigned int i = 0; i < SPI_processed; i++) {
+    int64 dep_deposit_serial_ids = DatumGetInt64(SPI_getbinval(SPI_tuptable->vals[i], SPI_tuptable->tupdesc, 1, &is_null));
+    bytea *dep_coin_pub = DatumGetByteaP(SPI_getbinval(SPI_tuptable->vals[i], SPI_tuptable->tupdesc, 2, &is_null));
+    int64 dep_amount_val = DatumGetInt64(SPI_getbinval(SPI_tuptable->vals[i], SPI_tuptable->tupdesc, 3, &is_null));
+    int32 dep_amount_frac = DatumGetInt32(SPI_getbinval(SPI_tuptable->vals[i], SPI_tuptable->tupdesc, 4, &is_null));
+
+    if (is_null)
+      elog(ERROR, "Failed to retrive data from deposit \n");
+    if (ref_plan == NULL)
+    {
+      // Execute second query with parameters from first query and store results in variables
+      const char * ref_sql =
+        "SELECT amount_with_fee_val, amount_with_fee_frac, coin_pub, deposit_serial_id "
+        "FROM refunds "
+        "WHERE coin_pub=$1 "
+        "AND deposit_serial_id=$2;";
+      SPIPlanPtr new_plan = SPI_prepare(ref_sql, 3, (Oid[]){BYTEAOID, INT8OID});
+      if (new_plan == NULL)
+        elog(ERROR, "SPI_prepare failed for refund\n");
+      ref_plan = SPI_saveplan(new_plan);
+      if (ref_plan == NULL)
+        elog(ERROR, "SPI_saveplan failed for refund\n");
+    }
+    values_refund[0] = PointerGetDatum(dep_coin_pub);
+    values_refund[1] = Int64GetDatum(dep_deposit_serial_ids);
+    res = SPI_execute_plan(ref_plan,
+                           values_refund,
+                           NULL,
+                           false,
+                           0);
+    if (res != SPI_OK_SELECT)
+      elog(ERROR, "Failed to execute subquery 2\n");
+    // STORE TUPTABLE refund
+    ref_res = SPI_tuptable;
+    for (unsigned int j = 0; j < SPI_processed; j++) {
+      int64 ref_refund_val = DatumGetInt64(SPI_getbinval(SPI_tuptable->vals[j], SPI_tuptable->tupdesc, 1, &is_null));
+      int32 ref_refund_frac = DatumGetInt32(SPI_getbinval(SPI_tuptable->vals[j], SPI_tuptable->tupdesc, 2, &is_null));
+      bytea *ref_coin_pub = DatumGetByteaP(SPI_getbinval(SPI_tuptable->vals[j], SPI_tuptable->tupdesc, 3, &is_null));
+      int64 ref_deposit_serial_id = DatumGetInt64(SPI_getbinval(SPI_tuptable->vals[j], SPI_tuptable->tupdesc, 4, &is_null));
+      // Execute third query with parameters from second query and store results in variables
+      ref_by_coin_coin_pub = ref_coin_pub;
+      ref_by_coin_deposit_serial_id = ref_deposit_serial_id;
+      // LOOP TO GET THE SUM FROM REFUND BY COIN
+      for (unsigned int i = 0; i<SPI_processed; i++)
+      {
+        if ((ref_by_coin_coin_pub ==
+             DatumGetByteaP(SPI_getbinval(SPI_tuptable->vals[i], SPI_tuptable->tupdesc, 1, &is_null)))
+            &&
+            (ref_by_coin_deposit_serial_id ==
+             DatumGetUInt64(SPI_getbinval(SPI_tuptable->vals[i], SPI_tuptable->tupdesc, 2, &is_null)))
+            )
+        {
+          sum_refund_val += ref_refund_val;
+          sum_refund_frac += ref_refund_frac;
+          norm_ref_by_coin_coin_pub = ref_by_coin_coin_pub;
+          norm_ref_by_coin_deposit_serial_id = ref_by_coin_deposit_serial_id;
+        }
+      }// END SUM CALCULATION
+      //NORMALIZE REFUND VAL FRAC
+      norm_refund_val =
+        (sum_refund_val + sum_refund_frac ) / 100000000;
+      norm_refund_frac =
+        sum_refund_frac % 100000000;
+      // Get refund values
+      s_refund_val += sum_refund_val;
+      s_refund_frac = sum_refund_frac;
+    }//END REFUND
+    if (norm_ref_by_coin_coin_pub == dep_coin_pub
+        && ref_by_coin_deposit_serial_id == dep_deposit_serial_ids
+        && norm_refund_val == dep_amount_val
+        && norm_refund_frac == dep_amount_frac)
+    {
+      new_dep_coin_pub = dep_coin_pub;
+    }
+    // Ensure we get the fee for each coin and not only once per denomination
+    if (fees_plan == NULL )
+    {
+      const char * fees_sql =
+        "SELECT "
+        "  denom.fee_deposit_val AS fee_val, "
+        "  denom.fee_deposit_frac AS fee_frac, "
+        "FROM known_coins kc"
+        "JOIN denominations denom USING (denominations_serial) "
+        "WHERE kc.coin_pub = $1 AND kc.coin_pub != $2;";
+      SPIPlanPtr new_plan = SPI_prepare(fees_sql, 3, (Oid[]){BYTEAOID, BYTEAOID});
+      if (new_plan == NULL)
+        {
+          elog(ERROR, "SPI_prepare for fees failed ! \n");
+        }
+      fees_plan = SPI_saveplan(new_plan);
+      if (fees_plan == NULL)
+        {
+          elog(ERROR, "SPI_saveplan for fees failed ! \n");
+        }
+    }
+    values_fees[0] = PointerGetDatum(dep_coin_pub);
+    values_fees[1] = PointerGetDatum(new_dep_coin_pub);
+    res = SPI_execute_plan(fees_plan, values_fees, NULL, false, 0);
+    if (res != SPI_OK_SELECT)
+      elog(ERROR, "SPI_execute_plan failed for fees \n");
+    fees_res = SPI_tuptable;
+    tupdesc = fees_res->tupdesc;
+    for (unsigned int i = 0; i<SPI_processed; i++)
+    {
+      HeapTuple tuple = fees_res->vals[i];
+      bool is_null;
+      uint64_t fee_val = DatumGetUInt64(SPI_getbinval(tuple, tupdesc, 1, &is_null));
+      uint32_t fee_frac = DatumGetUInt32(SPI_getbinval(tuple, tupdesc, 2, &is_null));
+      uint64_t fees_deposit_serial_id = DatumGetUInt64(SPI_getbinval(tuple, tupdesc, 3, &is_null));
+      if (dummy_plan == NULL)
+      {
+        const char *insert_dummy_sql =
+          "INSERT INTO "
+          "aggregation_tracking(deposit_serial_id, wtid_raw)"
+          " VALUES ($1, $2)";
+
+        SPIPlanPtr new_plan = SPI_prepare(insert_dummy_sql, 2, (Oid[]){INT8OID, BYTEAOID});
+        if (new_plan == NULL)
+          elog(ERROR, "FAILED to prepare aggregation tracking \n");
+        dummy_plan = SPI_saveplan(new_plan);
+        if ( dummy_plan == NULL )
+          elog(ERROR, "FAILED to saveplan aggregation tracking\n");
+      }
+      values_dummys[0] = Int64GetDatum(dep_deposit_serial_ids);
+      values_dummys[1] = PointerGetDatum(wtid_raw);
+      res = SPI_execute_plan(dummy_plan, values_dummys, NULL, false, 0);
+      if (res != SPI_OK_INSERT)
+        elog(ERROR, "Failed to insert dummy\n");
+      dummys_res = SPI_tuptable;
+      // Calculation of deposit fees for not fully refunded deposits
+      sum_dep_fee_val  += fee_val;
+      sum_dep_fee_frac += fee_frac;
+    }
+    // Get deposit values
+    sum_deposit_val += dep_amount_val;
+    sum_deposit_frac += dep_amount_frac;
+  }//END DEPOSIT
+  SPI_finish();
+  PG_RETURN_VOID();
+}
diff --git a/src/exchangedb/spi/own_test.control b/src/exchangedb/spi/own_test.control
new file mode 100644
index 000000000..4e73e207f
--- /dev/null
+++ b/src/exchangedb/spi/own_test.control
@@ -0,0 +1,4 @@
+comment = 'Example extension for testing purposes'
+default_version = '1.0'
+module_pathname = '$libdir/own_test'
+relocatable = true
diff --git a/src/exchangedb/spi/own_test.so b/src/exchangedb/spi/own_test.so
new file mode 100755
index 000000000..fda70c9d0
--- /dev/null
+++ b/src/exchangedb/spi/own_test.so
diff --git a/src/exchangedb/spi/own_test.sql b/src/exchangedb/spi/own_test.sql
new file mode 100644
index 000000000..369c56a60
--- /dev/null
+++ b/src/exchangedb/spi/own_test.sql
@@ -0,0 +1,216 @@
+
+DROP TABLE joseph_test.X;
+CREATE TABLE joseph_test.X (
+  a integer
+);
+
+INSERT INTO joseph_test.X (a) VALUES (1), (2), (3), (4), (5), (6), (7);
+
+DROP TABLE joseph_test.Y;
+CREATE TABLE joseph_test.Y (col1 INT, col2 INT);
+INSERT INTO joseph_test.Y (col1,col2) VALUES (1,2), (2,0), (0,4), (4,0), (0,6), (6,7), (7,8);
+
+DROP TABLE joseph_test.Z;
+CREATE TABLE joseph_test.Z(col1 BYTEA);
+DROP TABLE deposits;
+/*CREATE TABLE deposits(
+       deposit_serial_id BIGINT GENERATED BY DEFAULT AS IDENTITY
+      ,shard INT8 NOT NULL
+      ,coin_pub BYTEA NOT NULL CHECK (LENGTH(coin_pub)=32)
+      ,known_coin_id INT8 NOT NULL
+      ,amount_with_fee_val INT8 NOT NULL
+      ,amount_with_fee_frac INT4 NOT NULL
+      ,wallet_timestamp INT8 NOT NULL
+      ,exchange_timestamp INT8 NOT NULL
+      ,refund_deadline INT8 NOT NULL
+      ,wire_deadline INT8 NOT NULL
+      ,merchant_pub BYTEA NOT NULL CHECK (LENGTH(merchant_pub)=32)
+      ,h_contract_terms BYTEA NOT NULL CHECK (LENGTH(h_contract_terms)=64)
+      ,coin_sig BYTEA NOT NULL CHECK (LENGTH(coin_sig)=64)
+      ,wire_salt BYTEA NOT NULL CHECK (LENGTH(wire_salt)=16)
+      ,wire_target_h_payto BYTEA CHECK (LENGTH(wire_target_h_payto)=32)
+      ,done BOOLEAN NOT NULL DEFAULT FALSE
+      ,policy_blocked BOOLEAN NOT NULL DEFAULT FALSE
+      ,policy_details_serial_id INT8);
+*/
+--INSERT INTO deposits VALUES ();
+
+
+
+CREATE TABLE deposits(
+       deposit_serial_id BIGINT GENERATED BY DEFAULT AS IDENTITY
+      ,shard INT8 NOT NULL
+      ,coin_pub BYTEA NOT NULL CHECK (LENGTH(coin_pub)=32)
+      ,known_coin_id INT8 NOT NULL
+      ,amount_with_fee_val INT8 NOT NULL
+      ,amount_with_fee_frac INT4 NOT NULL
+      ,wallet_timestamp INT8 NOT NULL
+      ,exchange_timestamp INT8 NOT NULL
+      ,refund_deadline INT8 NOT NULL
+      ,wire_deadline INT8 NOT NULL
+      ,merchant_pub BYTEA NOT NULL CHECK (LENGTH(merchant_pub)=32)
+      ,h_contract_terms BYTEA NOT NULL CHECK (LENGTH(h_contract_terms)=64)
+      ,coin_sig BYTEA NOT NULL CHECK (LENGTH(coin_sig)=64)
+      ,wire_salt BYTEA NOT NULL CHECK (LENGTH(wire_salt)=16)
+      ,wire_target_h_payto BYTEA CHECK (LENGTH(wire_target_h_payto)=32)
+      ,done BOOLEAN NOT NULL DEFAULT FALSE
+      ,policy_blocked BOOLEAN NOT NULL DEFAULT FALSE
+      ,policy_details_serial_id INT8);
+
+
+CREATE OR REPLACE FUNCTION pg_spi_insert_int()
+  RETURNS VOID
+  LANGUAGE c COST 100
+AS '$libdir/own_test', 'pg_spi_insert_int';
+DROP FUNCTION pg_spi_select_from_x();
+CREATE OR REPLACE FUNCTION pg_spi_select_from_x()
+  RETURNS INT8
+  LANGUAGE c COST 100
+AS '$libdir/own_test', 'pg_spi_select_from_x';
+
+/*DROP FUNCTION pg_spi_select_pair_from_y();
+CREATE OR REPLACE FUNCTION pg_spi_select_pair_from_y()
+  RETURNS valuest
+  LANGUAGE c COST 100
+AS '$libdir/own_test', 'pg_spi_select_pair_from_y';
+*/
+/*CREATE OR REPLACE FUNCTION pg_spi_select_with_cond()
+  RETURNS INT8
+  LANGUAGE c COST 100
+AS '$libdir/own_test', 'pg_spi_select_with_cond';
+*/
+DROP FUNCTION pg_spi_update_y();
+CREATE OR REPLACE FUNCTION pg_spi_update_y()
+  RETURNS VOID
+  LANGUAGE c COST 100
+AS '$libdir/own_test', 'pg_spi_update_y';
+DROP FUNCTION pg_spi_prepare_example();
+
+CREATE OR REPLACE FUNCTION pg_spi_prepare_example()
+  RETURNS INT8
+  LANGUAGE c COST 100
+AS '$libdir/own_test', 'pg_spi_prepare_example';
+
+DROP FUNCTION pg_spi_prepare_example_without_saveplan();
+CREATE OR REPLACE FUNCTION pg_spi_prepare_example_without_saveplan()
+  RETURNS INT8
+  LANGUAGE c COST 100
+AS '$libdir/own_test', 'pg_spi_prepare_example_without_saveplan';
+
+CREATE OR REPLACE FUNCTION pg_spi_prepare_insert()
+  RETURNS VOID
+  LANGUAGE c COST 100
+AS '$libdir/own_test', 'pg_spi_prepare_insert';
+
+CREATE OR REPLACE FUNCTION pg_spi_prepare_insert_without_saveplan()
+  RETURNS VOID
+  LANGUAGE c COST 100
+AS '$libdir/own_test', 'pg_spi_prepare_insert_without_saveplan';
+
+/*DROP FUNCTION pg_spi_prepare_select_with_cond();
+CREATE OR REPLACE FUNCTION pg_spi_prepare_select_with_cond()
+  RETURNS INT8
+  LANGUAGE c COST 100
+AS '$libdir/own_test', 'pg_spi_prepare_select_with_cond';
+*/
+DROP FUNCTION pg_spi_prepare_select_with_cond_without_saveplan();
+CREATE OR REPLACE FUNCTION pg_spi_prepare_select_with_cond_without_saveplan()
+  RETURNS INT8
+  LANGUAGE c COST 100
+AS '$libdir/own_test', 'pg_spi_prepare_select_with_cond_without_saveplan';
+
+DROP FUNCTION pg_spi_prepare_update();
+CREATE OR REPLACE FUNCTION pg_spi_prepare_update()
+  RETURNS VOID
+  LANGUAGE c COST 100
+AS '$libdir/own_test', 'pg_spi_prepare_update';
+
+DROP FUNCTION pg_spi_get_dep_ref_fees(
+  IN in_timestamp INT8
+ ,IN merchant_pub BYTEA
+ ,IN wire_target_h_payto BYTEA
+ ,IN wtid BYTEA);
+CREATE OR REPLACE FUNCTION pg_spi_get_dep_ref_fees(
+  IN in_timestamp INT8
+ ,IN merchant_pub BYTEA
+ ,IN wire_target_h_payto BYTEA
+ ,IN wtid BYTEA
+)
+  RETURNS VOID
+  LANGUAGE c COST 100
+AS '$libdir/own_test', 'pg_spi_get_dep_ref_fees';
+
+CREATE OR REPLACE FUNCTION update_pg_spi_get_dep_ref_fees(
+ IN in_refund_deadline INT8,
+ IN in_merchant_pub BYTEA,
+ IN in_wire_target_h_payto BYTEA
+)
+RETURNS SETOF record
+LANGUAGE plpgsql VOLATILE
+AS $$
+DECLARE
+
+BEGIN
+RETURN QUERY
+  UPDATE deposits
+  SET done = TRUE
+  WHERE NOT (done OR policy_blocked)
+  AND refund_deadline < in_refund_deadline
+  AND merchant_pub = in_merchant_pub
+  AND wire_target_h_payto = in_wire_target_h_payto
+  RETURNING
+  deposit_serial_id,
+  coin_pub,
+  amount_with_fee_val,
+  amount_with_fee_frac;
+END $$;
+
+CREATE OR REPLACE FUNCTION stored_procedure_update(
+IN in_number INT8
+)
+RETURNS VOID
+LANGUAGE plpgsql
+AS $$
+BEGIN
+  UPDATE joseph_test.Y
+  SET col1 = 4
+  WHERE col2 = in_number;
+END $$;
+
+CREATE OR REPLACE FUNCTION stored_procedure_select(OUT out_value INT8)
+RETURNS INT8
+LANGUAGE plpgsql
+AS $$
+BEGIN
+  SELECT 1
+    INTO out_value
+  FROM joseph_test.X;
+  RETURN;
+END $$;
+
+
+CREATE OR REPLACE FUNCTION stored_procedure_insert(
+IN in_number INT8,
+OUT out_number INT8)
+RETURNS INT8
+LANGUAGE plpgsql
+AS $$
+BEGIN
+  INSERT INTO joseph_test.X (a)
+  VALUES (in_number)
+  RETURNING a INTO out_number;
+END $$;
+
+CREATE OR REPLACE FUNCTION stored_procedure_select_with_cond(
+IN in_number INT8,
+OUT out_number INT8
+)
+RETURNS INT8
+LANGUAGE plpgsql
+AS $$
+BEGIN
+ SELECT col1 INTO out_number
+ FROM joseph_test.Y
+ WHERE col2 = in_number;
+ RETURN;
+END $$;
diff --git a/src/exchangedb/spi/perf_own_test.c b/src/exchangedb/spi/perf_own_test.c
new file mode 100644
index 000000000..92be2235e
--- /dev/null
+++ b/src/exchangedb/spi/perf_own_test.c
@@ -0,0 +1,25 @@
+/*
+  This file is part of TALER
+  Copyright (C) 2014-2023 Taler Systems SA
+
+  TALER is free software; you can redistribute it and/or modify it under the
+  terms of the GNU General Public License as published by the Free Software
+  Foundation; either version 3, or (at your option) any later version.
+
+  TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+  A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License along with
+  TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+*/
+/**
+ * @file exchangedb/spi/perf_own_test.c
+ * @brief benchmark for 'own_test'
+ * @author Joseph Xu
+ */
+#include "exchangedb/platform.h"
+#include "exchangedb/taler_exchangedb_lib.h"
+#include "exchangedb/taler_json_lib.h"
+#include "exchangedb/taler_exchangedb_plugin.h"
+#include "own_test.sql"
diff --git a/src/exchangedb/spi/pg_aggregate.c b/src/exchangedb/spi/pg_aggregate.c
new file mode 100644
index 000000000..262100ce8
--- /dev/null
+++ b/src/exchangedb/spi/pg_aggregate.c
@@ -0,0 +1,389 @@
+#include "postgres.h"
+#include "fmgr.h"
+#include "utils/numeric.h"
+#include "utils/builtins.h"
+#include "executor/spi.h"
+
+PG_MODULE_MAGIC;
+
+PG_FUNCTION_INFO_V1(get_deposit_summary);
+
+Datum get_deposit_summary(PG_FUNCTION_ARGS)
+{
+
+  static SPIPlanPtr deposit_plan;
+  static SPIPlanPtr refund_plan;
+  static SPIPlanPtr refund_by_coin_plan;
+  static SPIPlanPtr norm_refund_by_coin_plan;
+  static SPIPlanPtr fully_refunded_by_coins_plan;
+  static SPIPlanPtr fees_plan;
+
+  int shard = PG_GETARG_INT32(0);
+  char * sql;
+  char *merchant_pub = text_to_cstring(PG_GETARG_TEXT_P(1));
+  char *wire_target_h_payto = text_to_cstring(PG_GETARG_TEXT_P(2));
+  char *wtid_raw = text_to_cstring(PG_GETARG_TEXT_P(3));
+  int refund_deadline = PG_GETARG_INT32(4);
+  int conn = SPI_connect();
+  if (conn != SPI_OK_CONNECT)
+  {
+    elog(ERROR, "DB connexion failed ! \n");
+  }
+
+  if ( deposit_plan == NULL
+       || refund_plan == NULL
+       || refund_by_coin_plan == NULL
+       || norm_refund_by_coin_plan = NULL
+       || fully_refunded_coins_plan = NULL
+       || fees_plan == NULL )
+  {
+    if (deposit_plan == NULL)
+    {
+      int nargs = 3;
+      Oid argtypes[3];
+      argtypes[0] = INT8OID;
+      argtypes[1] = BYTEAOID;
+      argtypes[2] = BYTEAOID;
+      const char *dep_sql =
+        "    UPDATE deposits"
+        "    SET done=TRUE"
+        "    WHERE NOT (done OR policy_blocked)"
+        "        AND refund_deadline < $1"
+        "        AND merchant_pub = $2"
+        "        AND wire_target_h_payto = $3"
+        "    RETURNING"
+        "        deposit_serial_id"
+        "        ,coin_pub"
+        "        ,amount_with_fee_val AS amount_val"
+        "        ,amount_with_fee_frac AS amount_frac";
+      SPIPlanPtr new_plan =
+        SPI_prepare(dep_sql, 4, argtypes});
+      if (new_plan == NULL)
+      {
+        elog(ERROR, "SPI_prepare for deposit failed ! \n");
+      }
+      deposit_plan = SPI_saveplan(new_plan);
+      if (deposit_plan == NULL)
+      {
+        elog(ERROR, "SPI_saveplan for deposit failed ! \n");
+      }
+    }
+
+    Datum values[4];
+    values[0] = Int64GetDatum(refund_deadline);
+    values[1] = CStringGetDatum(merchant_pub);
+    values[2] = CStringGetDatum(wire_target_h_payto);
+    int ret = SPI_execute_plan (deposit_plan,
+                                values,
+                                NULL,
+                                true,
+                                0);
+    if (ret != SPI_OK_UPDATE)
+    {
+        elog(ERROR, "Failed to execute subquery 1\n");
+    }
+    uint64_t *dep_deposit_serial_ids = palloc(sizeof(uint64_t) * SPI_processed);
+    BYTEA **dep_coin_pubs = palloc(sizeof(BYTEA *) * SPI_processed);
+    uint64_t *dep_amount_vals = palloc(sizeof(uint64_t) * SPI_processed);
+    uint32_t *dep_amount_fracs = palloc(sizeof(uint32_t) * SPI_processed);
+    for (unsigned int i = 0; i < SPI_processed; i++) {
+      HeapTuple tuple = SPI_tuptable->vals[i];
+      dep_deposit_serial_ids[i] =
+        DatumGetInt64(SPI_getbinval(tuple, SPI_tuptable->tupdesc, 1, &ret));
+      dep_coin_pubs[i] =
+        DatumGetByteaP(SPI_getbinval(tuple, SPI_tuptable->tupdesc, 2, &ret));
+      dep_amount_vals[i] =
+        DatumGetInt64(SPI_getbinval(tuple, SPI_tuptable->tupdesc, 3, &ret));
+      dep_amount_fracs[i] =
+        DatumGetInt32(SPI_getbinval(tuple, SPI_tuptable->tupdesc, 4, &ret));
+    }
+
+
+    if (refund_plan == NULL)
+    {
+      const char *ref_sql =
+        "ref AS ("
+        "  SELECT"
+        "    amount_with_fee_val AS refund_val"
+        "   ,amount_with_fee_frac AS refund_frac"
+        "   ,coin_pub"
+        "   ,deposit_serial_id"
+        "    FROM refunds"
+        "   WHERE coin_pub IN (SELECT coin_pub FROM dep)"
+        "     AND deposit_serial_id IN (SELECT deposit_serial_id FROM dep)) ";
+      SPIPlanPtr new_plan = SPI_prepare(ref_sql, 0, NULL);
+      if (new_plan == NULL)
+        elog (ERROR, "SPI_prepare for refund failed ! \n");
+      refund_plan = SPI_saveplan(new_plan);
+      if (refund_plan == NULL)
+      {
+        elog(ERROR, "SPI_saveplan for refund failed ! \n");
+      }
+    }
+
+    int64t_t *ref_deposit_serial_ids = palloc(sizeof(int64_t) * SPI_processed);
+
+    int res = SPI_execute_plan (refund_plan, NULL, NULL, false, 0);
+    if (res != SPI_OK_SELECT)
+    {
+      elog(ERROR, "Failed to execute subquery 2\n");
+    }
+    SPITupleTable *tuptable = SPI_tuptable;
+    TupleDesc tupdesc = tuptable->tupdesc;
+    for (unsigned int i = 0; i < SPI_processed; i++)
+    {
+      HeapTuple tuple = tuptable->vals[i];
+      Datum refund_val = SPI_getbinval(tuple, tupdesc, 1, &refund_val_isnull);
+      Datum refund_frac = SPI_getbinval(tuple, tupdesc, 2, &refund_frac_isnull);
+      Datum coin_pub = SPI_getbinval(tuple, tupdesc, 3, &coin_pub_isnull);
+      Datum deposit_serial_id = SPI_getbinval(tuple, tupdesc, 4, &deposit_serial_id_isnull);
+      if (refund_val_isnull
+          || refund_frac_isnull
+          || coin_pub_isnull
+          || deposit_serial_id_isnull )
+      {
+        elog(ERROR, "Failed to retrieve data from subquery 2");
+      }
+      uint64_t refund_val_int = DatumGetUInt64(refund_val);
+      uint32_t refund_frac_int = DatumGetUInt32(refund_frac);
+      BYTEA coin_pub = DatumGetByteaP(coin_pub);
+      ref_deposit_serial_ids = DatumGetInt64(deposit_serial_id);
+
+      refund *new_refund = (refund*) palloc(sizeof(refund));
+      new_refund->coin_pub = coin_pub_str;
+      new_refund->deposit_serial_id = deposit_serial_id_int;
+      new_refund->amount_with_fee_val = refund_val_int;
+      new_refund->amount_with_fee_frac = refund_frac_int;
+    }
+
+
+    if (refund_by_coin_plan == NULL)
+    {
+      const char *ref_by_coin_sql =
+        "ref_by_coin AS ("
+        "  SELECT"
+        "    SUM(refund_val) AS sum_refund_val"
+        "   ,SUM(refund_frac) AS sum_refund_frac"
+        "   ,coin_pub"
+        "   ,deposit_serial_id"
+        "    FROM ref"
+        "   GROUP BY coin_pub, deposit_serial_id) ";
+      SPIPlanPtr new_plan = SPI_prepare (ref_by_coin_sql, 0, NULL);
+      if (new_plan == NULL)
+        elog(ERROR, "SPI_prepare for refund by coin failed ! \n");
+      refund_by_coin_plan = SPI_saveplan (new_plan);
+      if (refund_by_coin_plan == NULL)
+        elog(ERROR, "SPI_saveplan for refund failed");
+    }
+
+
+    int res = SPI_execute_plan (refund_by_coin_plan, NULL, NULL, false, 0);
+    if (res != SPI_OK_SELECT)
+    {
+      elog(ERROR, "Failed to execute subquery 2\n");
+    }
+
+    SPITupleTable *tuptable = SPI_tuptable;
+    TupleDesc tupdesc = tuptable->tupdesc;
+    for (unsigned int i = 0; i < SPI_processed; i++)
+    {
+      HeapTuple tuple = tuptable->vals[i];
+      Datum sum_refund_val = SPI_getbinval(tuple, tupdesc, 1, &refund_val_isnull);
+      Datum sum_refund_frac = SPI_getbinval(tuple, tupdesc, 2, &refund_frac_isnull);
+      Datum coin_pub = SPI_getbinval(tuple, tupdesc, 3, &coin_pub_isnull);
+      Datum deposit_serial_id_int = SPI_getbinval(tuple, tupdesc, 4, &deposit_serial_id_isnull);
+      if (refund_val_isnull
+          || refund_frac_isnull
+          || coin_pub_isnull
+          || deposit_serial_id_isnull )
+      {
+        elog(ERROR, "Failed to retrieve data from subquery 2");
+      }
+      uint64_t s_refund_val_int = DatumGetUInt64(sum_refund_val);
+      uint32_t s_refund_frac_int = DatumGetUInt32(sum_refund_frac);
+      BYTEA coin_pub = DatumGetByteaP(coin_pub);
+      uint64_t deposit_serial_id_int = DatumGetInt64(deposit_serial_id_int);
+      refund *new_refund_by_coin = (refund*) palloc(sizeof(refund));
+      new_refund_by_coin->coin_pub = coin_pub;
+      new_refund_by_coin->deposit_serial_id = deposit_serial_id_int;
+      new_refund_by_coin->refund_amount_with_fee_val = s_refund_val_int;
+      new_refund_by_coin->refund_amount_with_fee_frac = s_refund_frac_int;
+    }
+
+
+    if (norm_refund_by_coin_plan == NULL)
+    {
+      const char *norm_ref_by_coin_sql =
+        "norm_ref_by_coin AS ("
+        "  SELECT"
+        "   coin_pub"
+        "   ,deposit_serial_id"
+        "    FROM ref_by_coin) ";
+      SPIPlanPtr new_plan = SPI_prepare (norm_ref_by_coin_sql, 0, NULL);
+      if (new_plan == NULL)
+        elog(ERROR, "SPI_prepare for norm refund by coin failed ! \n");
+      norm_refund_by_coin_plan = SPI_saveplan(new_plan);
+      if (norm_refund_by_coin_plan == NULL)
+        elog(ERROR, "SPI_saveplan for norm refund by coin failed ! \n");
+    }
+
+    double norm_refund_val =
+      ((double)new_refund_by_coin->refund_amount_with_fee_val
+       + (double)new_refund_by_coin->refund_amount_with_fee_frac) / 100000000;
+    double norm_refund_frac =
+      (double)new_refund_by_coin->refund_amount_with_fee_frac % 100000000;
+
+    if (fully_refunded_coins_plan == NULL)
+    {
+      const char *fully_refunded_coins_sql =
+        "fully_refunded_coins AS ("
+        "  SELECT"
+        "    dep.coin_pub"
+        "    FROM norm_ref_by_coin norm"
+        "    JOIN dep"
+        "      ON (norm.coin_pub = dep.coin_pub"
+        "      AND norm.deposit_serial_id = dep.deposit_serial_id"
+        "      AND norm.norm_refund_val = dep.amount_val"
+        "      AND norm.norm_refund_frac = dep.amount_frac)) ";
+      SPIPlanPtr new_plan =
+        SPI_prepare(fully_refunded_coins_sql, 0, NULL);
+      if (new_plan == NULL)
+        elog (ERROR, "SPI_prepare for fully refunded coins failed ! \n");
+      fully_refunded_coins_plan = SPI_saveplan(new_plan);
+      if (fully_refunded_coins_plan == NULL)
+        elog (ERROR, "SPI_saveplan for fully refunded coins failed ! \n");
+    }
+
+    int res = SPI_execute_plan(fully_refunded_coins_sql);
+    if ( res != SPI_OK_SELECT)
+      elog(ERROR, "Failed to execute subquery 4\n");
+    SPITupleTable * tuptable = SPI_tuptable;
+    TupleDesc tupdesc = tuptable->tupdesc;
+
+    BYTEA coin_pub = SPI_getbinval(tuple, tupdesc, 1, &coin_pub_isnull);
+    if (fees_plan == NULL)
+    {
+      const char *fees_sql =
+        "SELECT "
+        "  denom.fee_deposit_val AS fee_val, "
+        "  denom.fee_deposit_frac AS fee_frac, "
+        "  cs.deposit_serial_id "
+        "FROM dep cs "
+        "JOIN known_coins kc USING (coin_pub) "
+        "JOIN denominations denom USING (denominations_serial) "
+        "WHERE coin_pub NOT IN (SELECT coin_pub FROM fully_refunded_coins)";
+      SPIPlanPtr new_plan =
+        SPI_prepare(fees_sql, 0, NULL);
+      if (new_plan == NULL)
+      {
+        elog(ERROR, "SPI_prepare for fees failed ! \n");
+      }
+      fees_plan = SPI_saveplan(new_plan);
+      if (fees_plan == NULL)
+      {
+        elog(ERROR, "SPI_saveplan for fees failed ! \n");
+      }
+    }
+  }
+  int fees_ntuples;
+  SPI_execute(fees_sql, true, 0);
+  if (SPI_result_code() != SPI_OK_SELECT)
+  {
+    ereport(
+            ERROR,
+            (errcode(ERRCODE_INTERNAL_ERROR),
+             errmsg("deposit fee query failed: error code %d \n", SPI_result_code())));
+  }
+  fees_ntuples = SPI_processed;
+
+  if (fees_ntuples > 0)
+  {
+    for (i = 0; i < fees_ntuples; i++)
+    {
+      Datum fee_val_datum =
+        SPI_getbinval(SPI_tuptable->vals[i], SPI_tuptable->tupdesc, 1, &fee_null);
+      Datum fee_frac_datum =
+        SPI_getbinval(SPI_tuptable->vals[i], SPI_tuptable->tupdesc, 2, &fee_null);
+      Datum deposit_id_datum =
+        SPI_getbinval(SPI_tuptable->vals[i], SPI_tuptable->tupdesc, 3, &deposit_null);
+      if (!fee_null && !deposit_null)
+      {
+        int64 fee_val = DatumGetInt64(fee_val_datum);
+        int32 fee_frac = DatumGetInt32(fee_frac_datum);
+        int64 deposit_id = DatumGetInt64(deposit_id_datum);
+        sum_fee_value += fee_val;
+        sum_fee_fraction += fee_frac;
+        char *insert_agg_sql =
+          psprintf(
+                   "INSERT INTO "
+                   "aggregation_tracking(deposit_serial_id, wtid_raw)"
+                   " VALUES (%lld, '%s')",
+                   deposit_id, wtid_raw);
+        SPI_execute(insert_agg_sql, false, 0);
+      }
+    }
+  }
+
+  TupleDesc tupdesc;
+  SPITupleTable *tuptable = SPI_tuptable;
+  HeapTuple tuple;
+  Datum result;
+
+  if (tuptable == NULL || SPI_processed != 1)
+  {
+    ereport(
+            ERROR,
+            (errcode(ERRCODE_INTERNAL_ERROR),
+             errmsg("Unexpected result \n")));
+  }
+  tupdesc = SPI_tuptable->tupdesc;
+  tuple = SPI_tuptable->vals[0];
+  result = HeapTupleGetDatum(tuple);
+
+  TupleDesc result_desc = CreateTemplateTupleDesc(6, false);
+  TupleDescInitEntry(result_desc, (AttrNumber) 1, "sum_deposit_value", INT8OID, -1, 0);
+  TupleDescInitEntry(result_desc, (AttrNumber) 2, "sum_deposit_fraction", INT4OID, -1, 0);
+  TupleDescInitEntry(result_desc, (AttrNumber) 3, "sum_refund_value", INT8OID, -1, 0);
+  TupleDescInitEntry(result_desc, (AttrNumber) 4, "sum_refund_fraction", INT4OID, -1, 0);
+  TupleDescInitEntry(result_desc, (AttrNumber) 5, "sum_fee_value", INT8OID, -1, 0);
+  TupleDescInitEntry(result_desc, (AttrNumber) 6, "sum_fee_fraction", INT4OID, -1, 0);
+
+  int ret = SPI_prepare(sql, 4, argtypes);
+  if (ret != SPI_OK_PREPARE)
+  {
+    elog(ERROR, "Failed to prepare statement: %s \n", sql);
+  }
+
+  ret = SPI_execute_plan(plan, args, nulls, true, 0);
+  if (ret != SPI_OK_SELECT)
+  {
+    elog(ERROR, "Failed to execute statement: %s \n", sql);
+  }
+
+  if (SPI_processed > 0)
+  {
+    HeapTuple tuple;
+    Datum values[6];
+    bool nulls[6] = {false};
+    values[0] =
+      SPI_getbinval(SPI_tuptable->vals[0], SPI_tuptable->tupdesc, 1, &nulls[0]);
+    values[1] =
+      SPI_getbinval(SPI_tuptable->vals[0], SPI_tuptable->tupdesc, 2, &nulls[1]);
+    values[2] =
+      SPI_getbinval(SPI_tuptable->vals[0], SPI_tuptable->tupdesc, 3, &nulls[2]);
+    values[3] =
+      SPI_getbinval(SPI_tuptable->vals[0], SPI_tuptable->tupdesc, 4, &nulls[3]);
+    values[4] =
+      SPI_getbinval(SPI_tuptable->vals[0], SPI_tuptable->tupdesc, 5, &nulls[4]);
+    values[5] =
+      SPI_getbinval(SPI_tuptable->vals[0], SPI_tuptable->tupdesc, 6, &nulls[5]);
+    tuple = heap_form_tuple(result_desc, values, nulls);
+    PG_RETURN_DATUM(HeapTupleGetDatum(tuple));
+  }
+  SPI_finish();
+
+  PG_RETURN_NULL();
+}
+
+
+