{"id":46904,"date":"2023-09-09T09:59:29","date_gmt":"2022-12-17T05:18:27","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8databricks-sql%e4%b8%ad%e4%bd%bf%e7%94%a8%e6%b5%81%e5%bc%8f%e5%8c%96%e8%a1%a8%e8%bf%9b%e8%a1%8c%e6%95%b0%e6%8d%ae%e5%8a%a0%e8%bd%bd\/"},"modified":"2024-05-03T22:52:50","modified_gmt":"2024-05-03T14:52:50","slug":"%e5%9c%a8databricks-sql%e4%b8%ad%e4%bd%bf%e7%94%a8%e6%b5%81%e5%bc%8f%e5%8c%96%e8%a1%a8%e8%bf%9b%e8%a1%8c%e6%95%b0%e6%8d%ae%e5%8a%a0%e8%bd%bd","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8databricks-sql%e4%b8%ad%e4%bd%bf%e7%94%a8%e6%b5%81%e5%bc%8f%e5%8c%96%e8%a1%a8%e8%bf%9b%e8%a1%8c%e6%95%b0%e6%8d%ae%e5%8a%a0%e8%bd%bd\/","title":{"rendered":"\u5728Databricks SQL\u4e2d\u4f7f\u7528\u6d41\u5f0f\u5316\u8868\u8fdb\u884c\u6570\u636e\u52a0\u8f7d"},"content":{"rendered":"

\u5728Databricks SQL\u4e2d\u52a0\u8f7d\u6570\u636e | \u5728AWS\u4e0a\u7684Databricks [\u622a\u81f32023\u5e746\u670827\u65e5]<\/p>\n

\u9019\u672c\u66f8\u662f\u4e00\u500b\u6458\u8981\u7ffb\u8b6f\uff0c\u4e26\u4e0d\u80fd\u4fdd\u8b49\u5167\u5bb9\u7684\u6e96\u78ba\u6027\u3002\u6709\u95dc\u6e96\u78ba\u7684\u5167\u5bb9\uff0c\u8acb\u53c3\u8003\u539f\u6587\u3002<\/div>\n
\u9884\u89c8
\n\u8be5\u529f\u80fd\u6b63\u5728\u516c\u5f00\u9884\u89c8\u9636\u6bb5\u3002\u82e5\u8981\u8bbf\u95ee\uff0c\u8bf7\u586b\u5199\u6b64\u8868\u683c\u8fdb\u884c\u6ce8\u518c\u3002<\/div>\n

\u5efa\u8bae\u4f7f\u7528Databricks SQL\u6765\u5bfc\u5165\u6570\u636e\u65f6\u4f7f\u7528\u6d41\u5f0f\u5904\u7406\u8868\u3002\u6d41\u5f0f\u5904\u7406\u8868\u662fUnity Catalog\u7684\u6258\u7ba1\u8868, \u53ef\u652f\u6301\u6d41\u5f0f\u5904\u7406\u548c\u589e\u91cf\u6570\u636e\u5904\u7406\u3002\u5bf9\u4e8e\u6bcf\u4e2a\u6d41\u5f0f\u5904\u7406\u8868\u81ea\u52a8\u521b\u5efa\u4e86DLT\u8868\u3002\u60a8\u53ef\u4ee5\u5229\u7528\u6765\u81eaKafka\u6216\u4e91\u5bf9\u8c61\u5b58\u50a8\u7684\u589e\u91cf\u6570\u636e\u52a0\u8f7d\u6765\u4f7f\u7528\u6d41\u5f0f\u5904\u7406\u8868\u3002<\/p>\n

\u5728\u8fd9\u672c\u4e66\u4e2d\uff0c\u6211\u4eec\u5c06\u6f14\u793a\u5982\u4f55\u5229\u7528\u6d41\u5a92\u4f53\u8868\u4ece\u4f5c\u4e3aUnity\u76ee\u5f55\u5916\u90e8\u4f4d\u7f6e\u8bbe\u7f6e\u7684\u4e91\u5bf9\u8c61\u5b58\u50a8\u4e2d\u52a0\u8f7d\u6570\u636e\u3002<\/p>\n

\u5728\u5f00\u59cb\u4e4b\u524d<\/h1>\n

\u8bf7\u5728\u5f00\u59cb\u4e4b\u524d\u786e\u8ba4\u4ee5\u4e0b\u4e8b\u9879:<\/p>\n

    \n
  • \n
      Databricks\u30a2\u30ab\u30a6\u30f3\u30c8\u3067\u30b5\u30fc\u30d0\u30ec\u30b9\u304c\u6709\u52b9\u5316\u3055\u308c\u3066\u3044\u308b\u3002\u8a73\u7d30\u306b\u95a2\u3057\u3066\u306f\u3001Use serverless SQL warehouses\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/ul>\n<\/li>\n<\/ul>\n

       <\/p>\n

        \n
      • \n
          \u30ef\u30fc\u30af\u30b9\u30da\u30fc\u30b9\u3067Unity Catalog\u304c\u6709\u52b9\u5316\u3055\u308c\u3066\u3044\u308b\u3002\u8a73\u7d30\u306b\u3064\u3044\u3066\u306f\u3001Unity Catalog\u3092\u4f7f\u3044\u59cb\u3081\u308b\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/ul>\n<\/li>\n<\/ul>\n

           <\/p>\n

            \n
          • \n
              SQL\u30a6\u30a7\u30a2\u30cf\u30a6\u30b9\u3067Current\u30c1\u30e3\u30f3\u30cd\u30eb\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n

               <\/p>\n

                \n
              • \n
                  Unity Catalog\u306e\u5916\u90e8\u30ed\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u5bfe\u3059\u308bREAD FILES\u6a29\u9650\u304c\u3042\u308b\u3001\u8a73\u7d30\u306f\u3001Unity Catalog\u306b\u304a\u3051\u308b\u5916\u90e8\u30ed\u30b1\u30fc\u30b7\u30e7\u30f3\u3068\u30b9\u30c8\u30ec\u30fc\u30b8\u8cc7\u683c\u60c5\u5831\u306e\u7ba1\u7406\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/ul>\n<\/li>\n<\/ul>\n

                   <\/p>\n

                    \n
                  • \n
                      \u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\u3092\u4f5c\u6210\u3059\u308b\u30ab\u30bf\u30ed\u30b0\u306b\u5bfe\u3059\u308bUSE CATALOG\u6a29\u9650\u3002<\/ul>\n<\/li>\n<\/ul>\n

                       <\/p>\n

                        \n
                      • \n
                          \u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\u3092\u4f5c\u6210\u3059\u308b\u30b9\u30ad\u30fc\u30de\u306b\u5bfe\u3059\u308bUSE SCHEMA\u6a29\u9650\u3002<\/ul>\n<\/li>\n<\/ul>\n

                           <\/p>\n

                            \n
                          • \n
                              \u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\u3092\u4f5c\u6210\u3059\u308b\u30b9\u30ad\u30fc\u30de\u306b\u304a\u3051\u308bCREATE TABLE\u6a29\u9650\u3002<\/ul>\n<\/li>\n<\/ul>\n

                               <\/p>\n

                                \u30af\u30e9\u30a6\u30c9\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30b9\u30c8\u30ec\u30fc\u30b8\u306e\u30bd\u30fc\u30b9\u30c7\u30fc\u30bf\u306e\u30d1\u30b9\u3002\u4f8b\u3048\u3070\u3001s3:\/\/myBucket\/analysis\u3002<\/ul>\n
                                \u8bf7\u6ce8\u610f\uff0c\u672c\u6559\u7a0b\u5047\u8bbe\u60a8\u60f3\u52a0\u8f7d\u5230\u652f\u6301Unity\u76ee\u5f55\u4e4b\u5916\u7684\u4e91\u5bf9\u8c61\u5b58\u50a8\u4f4d\u7f6e\u7684\u6570\u636e\u3002<\/div>\n

                                \u5bfb\u627e\u548c\u9884\u89c8\u539f\u59cb\u6570\u636e<\/h1>\n
                                  \n
                                1. \n
                                    \u5728\u5de5\u4f5c\u533a\u7684\u4fa7\u8fb9\u680f\u4e2d\uff0c\u70b9\u51fb\u201c\u67e5\u8be2\u201d\uff0c\u7136\u540e\u70b9\u51fb\u201c\u521b\u5efa\u67e5\u8be2\u201d\u3002<\/ol>\n<\/li>\n<\/ol>\n

                                     <\/p>\n

                                      \n
                                    1. \n
                                        \u5728\u67e5\u8be2\u7f16\u8f91\u5668\u4e2d\uff0c\u4ece\u4e0b\u62c9\u83dc\u5355\u4e2d\u9009\u62e9\u6b63\u5728\u4f7f\u7528\u7684SQL\u6570\u636e\u4ed3\u5e93\uff0c\u8be5\u6570\u636e\u4ed3\u5e93\u4f7f\u7528\u201ccurrent\u201d\u9891\u9053\u3002<\/ol>\n<\/li>\n<\/ol>\n

                                         <\/p>\n

                                          \u5c06\u4e0b\u9762\u7684\u5185\u5bb9\u7c98\u8d34\u5230\u7f16\u8f91\u5668\u4e2d\uff0c\u5e76\u7528\u62ec\u53f7(<>)\u5185\u7684\u503c\u66ff\u6362\u4e3a\u60a8\u7279\u5b9a\u7684\u6e90\u6570\u636e\u4fe1\u606f\uff0c\u7136\u540e\u70b9\u51fb\u201c\u8fd0\u884c\u201d\u3002<\/ol>\n
                                          \u6ce8\u610f\uff1a
                                          \n\u5728\u6267\u884cread_files\u8868\u503c\u51fd\u6570\u65f6\uff0c\u5982\u679c\u51fd\u6570\u7684\u9ed8\u8ba4\u8bbe\u7f6e\u65e0\u6cd5\u89e3\u6790\u60a8\u7684\u6570\u636e\uff0c\u5219\u53ef\u80fd\u4f1a\u9047\u5230\u6a21\u5f0f\u63a8\u65ad\u9519\u8bef\u3002\u4f8b\u5982\uff0c\u5982\u679c\u60a8\u9700\u8981\u5728\u591a\u884c\u6a21\u5f0f\u4e0b\u8bbe\u7f6e\u591a\u884cCSV\u6216JSON\u6587\u4ef6\uff0c\u5219\u53ef\u80fd\u9700\u8981\u8c03\u6574\u89e3\u6790\u5668\u9009\u9879\u5217\u8868\u3002\u6709\u5173\u89e3\u6790\u5668\u9009\u9879\u7684\u8be6\u7ec6\u4fe1\u606f\uff0c\u8bf7\u53c2\u9605read_files\u8868\u503c\u51fd\u6570\u3002<\/div>\n
                                          \/* Discover your data in an external location *\/<\/span>\r\nLIST<\/span> \"s3:\/\/<bucket>\/<folder>\"<\/span>\r\n\r\n\/* Preview your data *\/<\/span>\r\nSELECT<\/span> *<\/span> FROM<\/span> read_files<\/span>(<\/span>\"s3:\/\/<bucket>\/<folder>\"<\/span>)<\/span> LIMIT<\/span> 10<\/span>\r\n<\/code><\/pre>\n
                                          \u52a0\u8f7d\u6570\u636e\u5230\u6d41\u5a92\u4f53\u8868<\/h1>\n
                                          \u8981\u4ece\u4e91\u5bf9\u8c61\u5b58\u50a8\u4e2d\u521b\u5efa\u6d41\u5f0f\u6570\u636e\u8868\uff0c\u8bf7\u5c06\u4ee5\u4e0b\u5185\u5bb9\u7c98\u8d34\u5230\u67e5\u8be2\u7f16\u8f91\u5668\u4e2d\uff0c\u5e76\u70b9\u51fb\u8fd0\u884c\uff1a<\/p>\n
                                          CREATE<\/span> OR<\/span> REFRESH<\/span> STREAMING<\/span> TABLE<\/span> <<\/span>table<\/span>-<\/span>name<\/span>><\/span> AS<\/span>\r\nSELECT<\/span> *<\/span> FROM<\/span> STREAM<\/span> read_files<\/span>(<\/span>'s3:\/\/<bucket>\/<folder>'<\/span>)<\/span>\r\n<\/code><\/pre>\n
                                          \u4f7f\u7528DLT\u7ba1\u9053\u8fdb\u884c\u6d41\u5f0f\u5904\u7406\u8868\u7684\u5237\u65b0<\/h1>\n
                                          \u5728\u8fd9\u4e2a\u90e8\u5206\uff0c\u6211\u4eec\u5c06\u89e3\u91ca\u4e00\u79cd\u6a21\u5f0f\uff0c\u5373\u4f7f\u7528\u7531\u67e5\u8be2\u5b9a\u4e49\u7684\u6e90\u53ef\u7528\u7684\u6700\u65b0\u6570\u636e\u5237\u65b0\u6d41\u8868\u3002<\/p>\n
                                          \u5728\u4f7f\u7528Databricks SQL\u8fdb\u884c\u521d\u59cb\u521b\u5efa\u548c\u6570\u636e\u52a0\u8f7d\u65f6\uff0c\u5bf9\u4e8e\u6d41\u5a92\u4f53\u8868\u7684CREATE\u64cd\u4f5c\u4f7f\u7528\u3002\u5bf9\u4e8e\u6d41\u5a92\u4f53\u8868\u7684REFRESH\u64cd\u4f5c\u4f7f\u7528Delta Live Tables\uff08DLT\uff09\u3002\u5bf9\u4e8e\u6bcf\u4e2a\u6d41\u5a92\u4f53\u8868\uff0cDLT\u7ba1\u9053\u5c06\u81ea\u52a8\u521b\u5efa\u3002\u5f53\u6d41\u5a92\u4f53\u8868\u8fdb\u884c\u5237\u65b0\u65f6\uff0c\u5c06\u542f\u52a8DLT\u7ba1\u9053\u7684\u66f4\u65b0\u4ee5\u6267\u884c\u5237\u65b0\u5904\u7406\u3002<\/p>\n
                                          \u6267\u884cREFRESH\u547d\u4ee4\u540e\uff0c\u4f1a\u8fd4\u56deDLT\u7ba1\u9053\u7684\u94fe\u63a5\u3002\u60a8\u53ef\u4ee5\u5229\u7528DLT\u7ba1\u9053\u7684\u94fe\u63a5\u6765\u68c0\u67e5\u5237\u65b0\u7684\u72b6\u6001\u3002<\/p>\n
                                          \u8bf7\u6ce8\u610f\uff0c\u53ea\u6709\u8868\u7684\u6240\u6709\u8005\u624d\u80fd\u5237\u65b0\u6d41\u5f0f\u8868\u4ee5\u83b7\u53d6\u6700\u65b0\u6570\u636e\u3002\u521b\u5efa\u8868\u7684\u7528\u6237\u5c06\u6210\u4e3a\u6240\u6709\u8005\uff0c\u65e0\u6cd5\u66f4\u6539\u6240\u6709\u8005\u8eab\u4efd\u3002<\/div>\n
                                          \u8bf7\u67e5\u770bDelta Live Tables\u662f\u4ec0\u4e48\uff1f<\/p>\n
                                          \u4ec5\u5bfc\u5165\u65b0\u6570\u636e<\/h2>\n
                                          \u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cread_files\u51fd\u6570\u5728\u521b\u5efa\u8868\u65f6\u5c06\u8bfb\u53d6\u6e90\u76ee\u5f55\u4e2d\u7684\u6240\u6709\u73b0\u6709\u6570\u636e\uff0c\u5e76\u5728\u6bcf\u6b21\u5237\u65b0\u65f6\u5904\u7406\u65b0\u5230\u8fbe\u7684\u8bb0\u5f55\u3002<\/p>\n
                                          \u4e3a\u4e86\u907f\u514d\u5728\u521b\u5efa\u8868\u65f6\u5bfc\u5165\u6e90\u76ee\u5f55\u4e2d\u7684\u73b0\u6709\u6570\u636e\uff0c\u53ef\u4ee5\u4f7f\u7528ignoreExistingFiles\u9009\u9879\u3002\u8fd9\u610f\u5473\u7740\u53ea\u6709\u5728\u521b\u5efa\u8868\u7684\u8fc7\u7a0b\u5b8c\u6210\u540e\u5230\u8fbe\u76ee\u5f55\u7684\u6570\u636e\u4f1a\u88ab\u5bfc\u5165\u3002\u4f8b\u5982\uff1a<\/p>\n
                                          CREATE<\/span> OR<\/span> REFRESH<\/span> STREAMING<\/span> TABLE<\/span> my_bronze_table<\/span>\r\nAS<\/span> SELECT<\/span> *<\/span>\r\nFROM<\/span> STREAM<\/span> read_files<\/span>(<\/span>'s3:\/\/mybucket\/analysis\/*\/*\/*.json'<\/span>,<\/span> ignoreExistingFiles<\/span> =><\/span> false<\/span>)<\/span>\r\n<\/code><\/pre>\n
                                          \u5b8c\u5168\u5237\u65b0\u6d41\u5a92\u4f53\u8868<\/h2>\n
                                          \u5168\u9762\u5237\u65b0\u4f1a\u4f7f\u7528\u6700\u65b0\u5b9a\u4e49\u91cd\u65b0\u5904\u7406\u53ef\u5728\u6e90\u4e2d\u4f7f\u7528\u7684\u6240\u6709\u6570\u636e\u3002\u5168\u9762\u5237\u65b0\u4f1a\u5220\u9664\u73b0\u6709\u6570\u636e\uff0c\u56e0\u6b64\u5bf9\u4e8e\u4e0d\u4fdd\u7559\u50cfKafka\u8fd9\u6837\u7684\u6240\u6709\u5386\u53f2\u6570\u636e\u6216\u4fdd\u7559\u671f\u9650\u8f83\u77ed\u7684\u6e90\uff0c\u4e0d\u5efa\u8bae\u8c03\u7528\u5168\u9762\u5237\u65b0\u3002\u5982\u679c\u6e90\u4e2d\u7684\u6570\u636e\u4e0d\u53ef\u7528\uff0c\u53ef\u80fd\u65e0\u6cd5\u6062\u590d\u65e7\u6570\u636e\u3002<\/p>\n
                                          \u4f8b\u5982\uff1a<\/p>\n
                                          REFRESH<\/span> STREAMING<\/span> TABLE<\/span> my_bronze_table<\/span> FULL<\/span>\r\n<\/code><\/pre>\n
                                          \u81ea\u52a8\u66f4\u65b0\u7684\u6d41\u5a92\u4f53\u65f6\u95f4\u8868<\/h2>\n
                                          \u4e3a\u4e86\u5c06\u6d41\u8868\u81ea\u52a8\u5237\u65b0\u8bbe\u7f6e\u4e3a\u57fa\u4e8e\u5df2\u5b9a\u4e49\u7684\u65e5\u7a0b\u8868\uff0c\u53ef\u4ee5\u5728\u67e5\u8be2\u7f16\u8f91\u5668\u4e2d\u7c98\u8d34\u4ee5\u4e0b\u5185\u5bb9\u5e76\u6267\u884c”\u8fd0\u884c”\uff1a<\/p>\n
                                          ALTER<\/span> STREAMING<\/span> TABLE<\/span>\r\n[[<\/span><<\/span>catalog<\/span>><\/span>.]<\/span><<\/span>database<\/span>><\/span>.]<\/span><<\/span>name<\/span>><\/span>\r\nADD<\/span> [<\/span>SCHEDULE<\/span> [<\/span>REFRESH<\/span>]<\/span>\r\n        CRON<\/span> '<cron-string>'<\/span>\r\n                [<\/span> AT<\/span> TIME<\/span> ZONE<\/span> '<timezone-id>'<\/span> ]];<\/span>\r\n<\/code><\/pre>\n
                                          \u8bf7\u67e5\u770bALTER STREAMING TABLE\u4ee5\u83b7\u53d6\u5237\u65b0\u65f6\u95f4\u8868\u67e5\u8be2\u7684\u793a\u4f8b\u3002<\/p>\n
                                          \u5237\u65b0\u72b6\u6001\u7684\u8ffd\u8e2a<\/h2>\n
                                          \u53ef\u4ee5\u901a\u8fc7\u5f15\u7528Delta Live Tables UI\u4e2d\u7684\u6d41\u8868\u7ba1\u7406\u7ba1\u9053\u6216\u6267\u884cDESCRIBE EXTENDED\u547d\u4ee4\u6765\u786e\u8ba4\u6d41\u8868\u5237\u65b0\u72b6\u6001\uff0c\u5e76\u67e5\u770b\u8fd4\u56de\u7684\u5237\u65b0\u4fe1\u606f\u3002<\/p>\n
                                          DESCRIBE<\/span> EXTENDED<\/span> <<\/span>table<\/span>-<\/span>name<\/span>><\/span>\r\n<\/code><\/pre>\n
                                          \u4eceKafka\u4e2d\u8fdb\u884c\u6d41\u5f0f\u6570\u636e\u63d0\u53d6<\/h1>\n
                                          \u6709\u5173\u5c06Kafka\u6d41\u5f0f\u4f20\u8f93\u793a\u4f8b\u5bfc\u5165\u7684\u4fe1\u606f\uff0c\u8bf7\u53c2\u9605read_kafka\u3002<\/p>\n
                                          \u5141\u8bb8\u8bbf\u95ee\u6d41\u5a92\u4f53\u8868<\/h1>\n
                                          \u8bf7\u5728\u67e5\u8be2\u7f16\u8f91\u5668\u4e2d\u7c98\u8d34\u4ee5\u4e0b\u5185\u5bb9\u5e76\u5355\u51fb\u8fd0\u884c\uff0c\u4ee5\u6388\u4e88\u5176\u4ed6\u7528\u6237\u5bf9\u6d41\u8868\u7684SELECT\u6743\u9650\uff1a<\/p>\n
                                          GRANT<\/span> SELECT<\/span> ON<\/span> TABLE<\/span> <<\/span>catalog<\/span>><\/span>.<\/span><<\/span>schema<\/span>><\/span>.<\/span><<\/span>table<\/span>><\/span> TO<\/span> <<\/span>user<\/span>-<\/span>or<\/span>-<\/span>group<\/span>><\/span>\r\n<\/code><\/pre>\n
                                          \u8bf7\u67e5\u770bUnity Catalog\u4e2d\u6709\u5173\u6743\u9650\u548c\u53ef\u5b89\u5168\u4fdd\u62a4\u5bf9\u8c61\u7684\u6388\u6743\u8be6\u7ec6\u4fe1\u606f\u3002<\/p>\n
                                          \u5176\u4ed6\u8d44\u6e90<\/h1>\n
                                            \n
                                          • \n
                                              Streaming table<\/ul>\n<\/li>\n<\/ul>\n
                                               <\/p>\n
                                                \n
                                              • \n
                                                  read_files table-valued function<\/ul>\n<\/li>\n<\/ul>\n
                                                   <\/p>\n
                                                    \n
                                                  • \n
                                                      CREATE STREAMING TABLE<\/ul>\n<\/li>\n<\/ul>\n
                                                       <\/p>\n
                                                        \n
                                                      • \n
                                                          ALTER STREAMING TABLE<\/ul>\n<\/li>\n<\/ul>\n
                                                           <\/p>\n
                                                            read_kafka table-valued function<\/ul>\n
                                                            Databricks\u5feb\u901f\u5165\u95e8\u6307\u5357<\/h3>\n
                                                            Databricks\u5feb\u901f\u5165\u95e8\u6307\u5357<\/p>\n
                                                            Databricks\u514d\u8d39\u8bd5\u7528<\/h3>\n
                                                            Databricks\u514d\u8d39\u8bd5\u7528<\/p>\n","protected":false},"excerpt":{"rendered":"
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