IDENTIFIER literal with double quotes inside single quotes is parsed as one token instead of multiple identifiers

When running the following statement:

CREATE TABLE IDENTIFIER('"ORGDATA"."PUBLIC"."car_sales"')

the parser produces:

SingleQuotedString("\"ORGDATA\".\"PUBLIC\".\"car_sales\"")

It is treated as a single token (a literal string) instead of being parsed into three separate identifiers ("ORGDATA", "PUBLIC", "car_sales").
Since the IDENTIFIER function expects a literal, the content must be re-parsed.

**Suggestions:**

1. Expose a function that can take a SingleQuotedString like: '"ORGDATA"."PUBLIC"."car_sales"' and re-parse it into separate Ident tokens (ORGDATA, PUBLIC, car_sales).

2. change the tokenizer so that when IDENTIFIER is used with a quoted string containing double quotes, the inner content is tokenized as identifiers rather than treated as a raw single string.

まず、パーサーが CREATE TABLE IDENTIFIER(...) をどのように処理し、SingleQuotedString の値が IDENTIFIER 関数または tokenizer にどのように到達するかを追跡します。例を再現し、意図された結果が3つの引用符付き識別子であるかを判断します。完了条件は、入力が単一のリテラルとして扱われなくなり、既存のパース動作が維持されることです。

索引モデルが issue の本文から書いたものです。