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backend/database/migrations/011_add_cycle_feed_initial_balance.sql

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+-- Migration: Add cycle_feed_initial_balance table
+-- Description: Store initial feed sack balance (saldo karung awal) per cycle
+-- Date: 2026-05-26
+
+CREATE TABLE IF NOT EXISTS cycle_feed_initial_balance (
+    id SERIAL PRIMARY KEY,
+    cycle_id VARCHAR(255) NOT NULL UNIQUE,
+    saldo_awal INTEGER NOT NULL DEFAULT 0 CHECK(saldo_awal >= 0),
+    created_by VARCHAR(255),
+    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (cycle_id) REFERENCES cycles(id) ON DELETE CASCADE
+);
+
+-- Create index for faster lookups by cycle
+CREATE INDEX IF NOT EXISTS idx_cycle_feed_initial_balance_cycle ON cycle_feed_initial_balance(cycle_id);
+
+-- Trigger for automatic updated_at timestamp
+DROP TRIGGER IF EXISTS update_cycle_feed_initial_balance_updated_at ON cycle_feed_initial_balance;
+CREATE TRIGGER update_cycle_feed_initial_balance_updated_at
+    BEFORE UPDATE ON cycle_feed_initial_balance
+    FOR EACH ROW
+    EXECUTE FUNCTION update_updated_at_column();