Try to calculate balances locally

postgres/cumultative-balances.sql.go

@@ -0,0 +1,60 @@
+// Code generated by sqlc. DO NOT EDIT.
+// source: cumultative-balances.sql
+
+package postgres
+
+import (
+	"context"
+	"time"
+
+	"github.com/google/uuid"
+)
+
+const getCumultativeBalances = `-- name: GetCumultativeBalances :many
+SELECT COALESCE(ass.date, tra.date), COALESCE(ass.category_id, tra.category_id),
+       COALESCE(ass.amount, 0)::decimal(12,2) as assignments, SUM(ass.amount) OVER (PARTITION BY ass.category_id ORDER BY ass.date)::decimal(12,2) as assignments_cum,
+       COALESCE(tra.amount, 0)::decimal(12,2) as transactions, SUM(tra.amount) OVER (PARTITION BY tra.category_id ORDER BY tra.date)::decimal(12,2) as transactions_cum
+FROM assignments_by_month as ass
+FULL OUTER JOIN transactions_by_month as tra ON ass.date = tra.date AND ass.category_id = tra.category_id
+WHERE (ass.budget_id IS NULL OR ass.budget_id = $1) AND (tra.budget_id IS NULL OR tra.budget_id = $1)
+ORDER BY COALESCE(ass.date, tra.date), COALESCE(ass.category_id, tra.category_id)
+`
+
+type GetCumultativeBalancesRow struct {
+	Date            time.Time
+	CategoryID      uuid.UUID
+	Assignments     Numeric
+	AssignmentsCum  Numeric
+	Transactions    Numeric
+	TransactionsCum Numeric
+}
+
+func (q *Queries) GetCumultativeBalances(ctx context.Context, budgetID uuid.UUID) ([]GetCumultativeBalancesRow, error) {
+	rows, err := q.db.QueryContext(ctx, getCumultativeBalances, budgetID)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var items []GetCumultativeBalancesRow
+	for rows.Next() {
+		var i GetCumultativeBalancesRow
+		if err := rows.Scan(
+			&i.Date,
+			&i.CategoryID,
+			&i.Assignments,
+			&i.AssignmentsCum,
+			&i.Transactions,
+			&i.TransactionsCum,
+		); err != nil {
+			return nil, err
+		}
+		items = append(items, i)
+	}
+	if err := rows.Close(); err != nil {
+		return nil, err
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+	return items, nil
+}

postgres/queries/cumultative-balances.sql

@@ -0,0 +1,8 @@
+-- name: GetCumultativeBalances :many
+SELECT COALESCE(ass.date, tra.date), COALESCE(ass.category_id, tra.category_id),
+       COALESCE(ass.amount, 0)::decimal(12,2) as assignments, SUM(ass.amount) OVER (PARTITION BY ass.category_id ORDER BY ass.date)::decimal(12,2) as assignments_cum,
+       COALESCE(tra.amount, 0)::decimal(12,2) as transactions, SUM(tra.amount) OVER (PARTITION BY tra.category_id ORDER BY tra.date)::decimal(12,2) as transactions_cum
+FROM assignments_by_month as ass
+FULL OUTER JOIN transactions_by_month as tra ON ass.date = tra.date AND ass.category_id = tra.category_id
+WHERE (ass.budget_id IS NULL OR ass.budget_id = @budget_id) AND (tra.budget_id IS NULL OR tra.budget_id = @budget_id)
+ORDER BY COALESCE(ass.date, tra.date), COALESCE(ass.category_id, tra.category_id);