{"id":2128,"date":"2021-09-04T16:34:14","date_gmt":"2021-09-04T07:34:14","guid":{"rendered":"https:\/\/dennie.tokyo\/it\/?p=2128"},"modified":"2022-04-03T15:07:27","modified_gmt":"2022-04-03T06:07:27","slug":"%e3%80%90dynamodb%e3%80%91aws-sdk-%e3%82%92%e4%bd%bf%e7%94%a8%e3%81%97%e3%81%9fscan%e3%81%ae%e5%ae%9f%e8%a1%8c","status":"publish","type":"post","link":"https:\/\/dennie.tokyo\/it\/?p=2128","title":{"rendered":"\u3010DynamoDB\u3011AWS SDK \u3092\u4f7f\u7528\u3057\u305fscan\u306e\u5b9f\u884c"},"content":{"rendered":"\n

\u30c6\u30fc\u30d6\u30eb\u304b\u3089\u8907\u6570\u9805\u76ee\u3092\u53d6\u5f97\u3057\u305f\u3044\u5834\u5408\u3001query\u3092\u4f7f\u3046\u65b9\u6cd5\u4ee5\u5916\u306bscan\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n\n\n\n\n

\u4eca\u56de\u306fscan\u3092\u5b9f\u884c\u3057\u3001\u9805\u76ee\u3092\u8907\u6570\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

\u30b9\u30ad\u30e3\u30f3<\/h1>\n\n\n\n

\u30b9\u30ad\u30e3\u30f3\u306f\u30d7\u30e9\u30a4\u30de\u30ea\u30ad\u30fc\u306e\u6307\u5b9a\u306f\u5fc5\u8981\u3042\u308a\u307e\u305b\u3093\u3002
\u30b9\u30ad\u30e3\u30f3\u306e\u51e6\u7406\u3068\u3057\u3066\u306f\u6307\u5b9a\u3057\u305f\u30c6\u30fc\u30d6\u30eb\u304b\u3089\u5168\u3066\u306e\u9805\u76ee\u3092\u53d6\u5f97\u3057\u3066\u3001\u9805\u76ee\u53d6\u5f97\u306b\u6761\u4ef6\u304c\u6307\u5b9a\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3001\u6761\u4ef6\u306b\u4e00\u81f4\u3059\u308b\u9805\u76ee\u306e\u307f\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

\u30c6\u30fc\u30d6\u30eb\u306e\u5185\u5bb9<\/h1>\n\n\n\n

Musics\u3068\u3044\u3046\u30c6\u30fc\u30d6\u30eb\u306b\u5bfe\u3057\u3066\u30b9\u30ad\u30e3\u30f3\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002
\u30c6\u30fc\u30d6\u30eb\u306e\u5185\u5bb9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

artist: \u30d1\u30fc\u30c6\u30b7\u30e7\u30f3\u30ad\u30fc
title: \u30bd\u30fc\u30c8\u30ad\u30fc<\/p>\n\n\n\n

\u30b9\u30ad\u30e3\u30f3\u306e\u5b9f\u884c<\/h1>\n\n\n\n

\u5b9f\u884c<\/h2>\n\n\n\n

artist\u540d\u304c “B” \u304b\u3089\u59cb\u307e\u308a\u3001\u304b\u3064\u3001title \u304c “IN” \u304b\u3089\u59cb\u307e\u308b\u9805\u76ee\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

Lambda\u95a2\u6570\u306e\u5185\u5bb9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n\n\n\n

const DynamoDbSetter = require(".\/DynamoDbSetter");\n \nmodule.exports = class DynamoDbOperator extends DynamoDbSetter{\n \n    async exec(event) {\n \n        \/\/ \u5b9f\u884c\u5185\u5bb9\n        let params = {\n            TableName : "Musics",\n            FilterExpression: "begins_with(#artist, :artistValue) AND begins_with(#title, :titleValue)",\n            ExpressionAttributeNames: {\n                "#artist": "artist",\n                "#title": "title",\n            },\n            ExpressionAttributeValues: {\n                ":artistValue": {"S": "B"},\n                ":titleValue": {"S": "IN"},\n            },\n            ReturnConsumedCapacity: "INDEXES"\n        };\n    \n        \/\/ \u5b9f\u884c\n        return await this.dynamodb.scan(params).promise();\n \n    }\n}<\/code><\/pre><\/div>\n\n\n\n
\u5b9f\u884c\u5185\u5bb9\u306e\u8aac\u660e<\/h2>\n\n\n\n
FilterExpression<\/h3>\n\n\n\n
\u9805\u76ee\u3092\u53d6\u5f97\u3059\u308b\u6761\u4ef6\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002
begins_with \u306b\u3088\u308a\u524d\u65b9\u4e00\u81f4\u691c\u7d22\u304c\u53ef\u80fd\u3067\u3059\u3002
AND \u3084 OR \u306b\u3088\u308a\u6761\u4ef6\u3092\u8907\u6570\u6307\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u7d50\u679c<\/h2>\n\n\n\n
{\n    "Items": [\n        {\n            "year": {\n                "N": "1991"\n            },\n            "artist": {\n                "S": "B'z"\n            },\n            "genre": {\n                "S": "Lock"\n            },\n            "title": {\n                "S": "IN THE LIFE"\n            }\n        }\n    ],\n    "Count": 1,\n    "ScannedCount": 5,\n    "ConsumedCapacity": {\n        "TableName": "Musics",\n        "CapacityUnits": 0.5,\n        "Table": {\n            "CapacityUnits": 0.5\n        }\n    }\n}<\/code><\/pre><\/div>\n\n\n\n
ScannedCount \u304c 5 \u306b\u306a\u3063\u3066\u3044\u308b\u306e\u3067\u30015\u9805\u76ee\u304c\u53d6\u5f97\u3055\u308c\u305f\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002Count \u304c1\u306a\u306e\u3067\u6761\u4ef6\u306b\u4e00\u81f4\u3059\u308b\u9805\u76ee\u304c1\u3064\u3042\u3063\u305f\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\u30ad\u30e3\u30d1\u30b7\u30c6\u30a3\u30fc\u30e6\u30cb\u30c3\u30c8<\/h1>\n\n\n\n
\u30b9\u30ad\u30e3\u30f3\u306f\u30c6\u30fc\u30d6\u30eb\u304b\u3089\u5168\u3066\u306e\u9805\u76ee\u3092\u53d6\u5f97\u3057\u305f\u5f8c\u306b\u3001\u6761\u4ef6\u306b\u4e00\u81f4\u3059\u308b\u9805\u76ee\u306e\u307f\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002
\u6d88\u8cbb\u3055\u308c\u308b\u30ad\u30e3\u30d1\u30b7\u30c6\u30a3\u30fc\u30e6\u30cb\u30c3\u30c8\u306e\u8a08\u7b97\u306f\u3001\u6761\u4ef6\u306b\u4e00\u81f4\u3057\u305f\u9805\u76ee\u3067\u306f\u306a\u304f\u3001\u30c6\u30fc\u30d6\u30eb\u304b\u3089\u53d6\u5f97\u3057\u305f\u5168\u3066\u306e\u9805\u76ee\u306e\u30b5\u30a4\u30ba\u304c\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002
\u30b9\u30ad\u30e3\u30f3\u306f\u3042\u304f\u307e\u3067\u3082\u30c6\u30fc\u30d6\u30eb\u306e\u9805\u76ee\u5168\u3066\u3092\u53d6\u5f97\u3059\u308b\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002<\/p>\n\n\n\n
\u6700\u5f8c\u306b<\/h1>\n\n\n\n
\u6b21\u56de\u306fDynamoDB\u304c\u9805\u76ee\u306e\u6709\u52b9\u671f\u9650\u3092\u5224\u65ad\u3057\u3066\u81ea\u52d5\u7684\u306b\u9805\u76ee\u3092\u524a\u9664\u3059\u308b\u4e8b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u6b21\u56de<\/span>\n
\u3010DynamoDB\u3011AWS SDK \u3092\u4f7f\u7528\u3057\u305f\u9805\u76ee\u306e\u6709\u52b9\u671f\u9650\u306e\u8a2d\u5b9a<\/a><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
\u30c6\u30fc\u30d6\u30eb\u304b\u3089\u8907\u6570\u9805\u76ee\u3092\u53d6\u5f97\u3057\u305f\u3044\u5834\u5408\u3001query\u3092\u4f7f\u3046\u65b9\u6cd5\u4ee5\u5916\u306bscan\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"author":1,"featured_media":7,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,19,20],"tags":[],"class_list":["post-2128","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aws","category-dynamodb","category-lambda"],"_links":{"self":[{"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/posts\/2128","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2128"}],"version-history":[{"count":11,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/posts\/2128\/revisions"}],"predecessor-version":[{"id":3389,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/posts\/2128\/revisions\/3389"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/media\/7"}],"wp:attachment":[{"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2128"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2128"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2128"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}