Function compileExpressionInternal

packages/db/src/query/compiler/evaluators.ts:110–134

* Internal unified expression compiler that handles both namespaced and single-row evaluation

(
  expr: BasicExpression,
  isSingleRow: boolean,
)

 * Internal unified expression compiler that handles both namespaced and single-row evaluation
 */
function compileExpressionInternal(
  expr: BasicExpression,
  isSingleRow: boolean,
): (data: any) => any {
  switch (expr.type) {
    case `val`: {
      // For constant values, return a function that just returns the value
      const value = expr.value
      return () => value
    }

    case `ref`: {
      // For references, compile based on evaluation mode
      return isSingleRow ? compileSingleRowRef(expr) : compileRef(expr)
    }

    case `func`: {
      // For functions, use the unified compiler
      return compileFunction(expr, isSingleRow)
    }

    default:
      throw new UnknownExpressionTypeError((expr as any).type)
  }
}

/**
 * Compiles a reference expression into an optimized evaluator