kulakpos_web/walkthroughs/2026-05-14_b817429e_Walkthrough__Fixing_PostgreSQL_Compatibility.md

Walkthrough - Fixing PostgreSQL Compatibility

I have resolved the SQL errors occurring in the Loss Profit History module when running on PostgreSQL.

Changes Made

Business Module Controllers

• AcnooLossProfitHistoryController.php:
  • Quoted saleDate, lossProfit, incomeDate, expenseDate, and date columns in all DB::raw expressions.
  • Changed double quotes (") to single quotes (') for string literals ('positive', 'negative') in CASE statements.
• AcnooLossProfitHistoryReportController.php:
  • Applied identical fixes for PostgreSQL compatibility.
• AcnooProductLossProfitReportController.php:
  • Quoted lossProfit in CASE statements.

Export Classes

• ExportLossProfitHistory.php:
  • Fixed column quoting and string literals for Excel/CSV exports.
• ExportProductLossProfit.php:
  • Fixed column quoting in CASE statements for product loss/profit exports.

Verification Results

• The code changes directly address the SQLSTATE[42703] (Undefined column) error by ensuring PostgreSQL recognizes the mixed-case column names.
• String literal fixes prevent PostgreSQL from interpreting 'positive' and 'negative' as column names.