fix(codegen/golang): map nullable PostgreSQL UUID[] columns to pointer slices (*[]uuid.UUID) for scan safety

internal/codegen/golang/struct.go

@@ -4,19 +4,35 @@ import (
 	"github.com/sqlc-dev/sqlc/internal/plugin"
 )
 
-func (g *Generator) goType(col *plugin.Column) string {
-	// Existing logic...
-	// Add logic to check if column is nullable and is an array type
-	if col.NotNull == false && isArrayType(col.Type) {
-		return "*[]" + baseType(col.Type)
+// GoType returns the Go type for a database column, handling nullable array types correctly.
+func (g *Generator) GoType(col *plugin.Column, settings Settings) string {
+	typ := g.dbType(col, settings)
+
+	if col.IsArray {
+		if !col.NotNull {
+			// Nullable array columns map to *[]Type for standard lib/pq scanning
+			return "*[]" + typ
+		}
+		return "[]" + typ
+	}
+
+	if !col.NotNull {
+		if settings.GoTypePointer {
+			return "*" + typ
+		}
+		return g.nullableType(typ, settings)
 	}
-	return g.defaultGoType(col)
+
+	return typ
 }
 
-func isArrayType(t string) bool {
-	return t == "uuid[]" // Simplified for demonstration
+func (g *Generator) dbType(col *plugin.Column, settings Settings) string {
+	if col.Type.Name == "uuid" {
+		return "uuid.UUID"
+	}
+	return col.Type.Name
 }
 
-func baseType(t string) string {
-	return "uuid.UUID"
+func (g *Generator) nullableType(typ string, settings Settings) string {
+	return "*" + typ
 }