arrays - AWS S3 - 在嵌套 JSON 文件中搜索特定文本

Question

{
    "repo": [
        {
            "book": 47,
            "version": 1,
            "bookName": "Book1",
            "chapters": [
                {
                    "chapterId": 1,
                    "chapterContents": [
                        {
                            "line": 1,
                            "Text": "1. The first text of chapter 1 book 1"
                        },
                        {
                            "line": 2,
                            "Text": "2. The second text of chapter 1 book 1"
                        }
                    ]
                },
                {
                    "chapterId": 2,
                    "chapterContents": [
                        {
                            "line": 1,
                            "Text": "1. The first text of chapter 2 book 1"
                        }
                    ]
                }
            ]
        }
    ]
}

这是在 Amazon S3 中存储为 JSON 文件的数据模型的格式。有很多书有很多章节和文字内容。要求是在所有书籍中搜索特定文本，并列出找到该文本的行、章、书籍和版本。如何对嵌套数组 JSON 文件进行 S3 查询？

Answer 1

您可以使用Amazon Athena从 S3 查询嵌套的 JSON 数据。

应该可以在 json 中搜索值。你可以在这里找到一个例子：

WITH dataset AS (
  SELECT * FROM (VALUES
    (JSON '{"name": "Bob Smith", "org": "legal", "projects": ["project1"]}'),
    (JSON '{"name": "Susan Smith", "org": "engineering", "projects": ["project1", "project2", "project3"]}'),
    (JSON '{"name": "Jane Smith", "org": "finance", "projects": ["project1", "project2"]}')
  ) AS t (users)
)
SELECT json_extract_scalar(users, '$.name') AS user
FROM dataset
WHERE json_array_contains(json_extract(users, '$.projects'), 'project2')