Function processArgument

packages/db/src/query/compiler/select.ts:262–275

(
  arg: BasicExpression | Aggregate,
  namespacedRow: NamespacedRow,
)

 * Processes a single argument in a function context
 */
export function processArgument(
  arg: BasicExpression | Aggregate,
  namespacedRow: NamespacedRow,
): any {
  if (isAggregateExpression(arg)) {
    throw new AggregateNotSupportedError()
  }

  // Pre-compile the expression and evaluate immediately
  const compiledExpression = compileExpression(arg)
  const value = compiledExpression(namespacedRow)

  return value
}

/**
 * Helper function to check if an object is a nested select object