{"id":46792,"date":"2024-01-19T08:25:47","date_gmt":"2023-09-04T05:31:06","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8ksqldb%e5%b0%86%e6%b6%88%e6%81%af%e8%bf%9b%e8%a1%8c%e5%8a%a0%e5%b7%a5%e5%b9%b6%e8%bd%ac%e6%8d%a2%e4%b8%batombstone%e8%ae%b0%e5%bd%95%e7%9a%84%e6%8a%80%e5%b7%a7%e3%80%82\/"},"modified":"2024-05-04T19:04:55","modified_gmt":"2024-05-04T11:04:55","slug":"%e4%bd%bf%e7%94%a8ksqldb%e5%b0%86%e6%b6%88%e6%81%af%e8%bf%9b%e8%a1%8c%e5%8a%a0%e5%b7%a5%e5%b9%b6%e8%bd%ac%e6%8d%a2%e4%b8%batombstone%e8%ae%b0%e5%bd%95%e7%9a%84%e6%8a%80%e5%b7%a7%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8ksqldb%e5%b0%86%e6%b6%88%e6%81%af%e8%bf%9b%e8%a1%8c%e5%8a%a0%e5%b7%a5%e5%b9%b6%e8%bd%ac%e6%8d%a2%e4%b8%batombstone%e8%ae%b0%e5%bd%95%e7%9a%84%e6%8a%80%e5%b7%a7%e3%80%82\/","title":{"rendered":"\u4f7f\u7528ksqlDB\u5c06\u6d88\u606f\u8fdb\u884c\u52a0\u5de5\u5e76\u8f6c\u6362\u4e3aTombstone\u8bb0\u5f55\u7684\u6280\u5de7"},"content":{"rendered":"<p>\u5728Kafka\u4e2d\uff0c\u6d88\u606f\u53ef\u4ee5\u662f\u4e8b\u4ef6\u672c\u8eab\uff0c\u7531\u534f\u8c03\u65b9\u4ea7\u751f\uff0c\u4e5f\u53ef\u4ee5\u4f5c\u4e3aCDC\u6355\u83b7\u7684\u6e90\u8868\u7684\u53d8\u66f4\u5185\u5bb9\u7684\u8868\u793a\u65b9\u5f0f\u3002<br \/>\n\u5982\u679c\u7528\u4f5c\u6e90\u8868\u7684\u53d8\u66f4\u5185\u5bb9\uff0c\u90a3\u4e48INSERT\/UPDATE\/DELETE\u5728\u6d88\u606f\u4e2d\u4f1a\u4f53\u73b0\u51fa\u6e90\u8868\u7684\u64cd\u4f5c\uff0c\u4f46\u662fDELETE\u65f6\u7684\u6d88\u606f\u5185\u5bb9\u4f1a\u7a0d\u6709\u7279\u6b8a\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d7aa6913a08637a696e49\/1-0.png\" alt=\"image.png\" \/><\/div>\n<p>\u6d88\u606f\u7684\u5185\u5bb9\u4e0eCDC\u4ea7\u54c1\u89c4\u683c\u6709\u5173\uff0c\u4f46\u57fa\u672c\u4e0a\u4e0e\u4e0a\u8ff0\u5185\u5bb9\u76f8\u540c\u3002<\/p>\n<p>\u4ee5\u4e0b\u4e3a\u4e2d\u6587\u7ffb\u8bd1\uff1a<br \/>\n\u8981\u70b9\uff1a<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u30ad\u30fc\u90e8\u3068\u30d0\u30ea\u30e5\u30fc\u90e8\u306b\u5206\u304b\u308c\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">INSERT\uff0fUPDATE\u304c\u3042\u308b\u3068\u3001\u66f4\u65b0\u5f8c\u306e\u30ec\u30b3\u30fc\u30c9\u306e\u4e3b\u30ad\u30fc\u3092\u30ad\u30fc\u90e8\u306b\u3001\u5168\u30ab\u30e9\u30e0\u3092\u30d0\u30ea\u30e5\u30fc\u90e8\u306b\u30bb\u30c3\u30c8\u3057\u305f\u30e1\u30c3\u30bb\u30fc\u30b8\u304cKafka\u306b\u9023\u643a\u3055\u308c\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">DELETE\u304c\u3042\u308b\u3068\u3001\u524a\u9664\u3055\u308c\u305f\u30ec\u30b3\u30fc\u30c9\u306e\u4e3b\u30ad\u30fc\u3092\u30ad\u30fc\u90e8\u306b\u3001\u30d0\u30ea\u30e5\u30fc\u90e8\u306fnull\u306b\u3057\u305f\u30e1\u30c3\u30bb\u30fc\u30b8\u304cKafka\u306b\u9023\u643a\u3055\u308c\u307e\u3059\u3002<\/ul>\n<p>\u901a\u8fc7DELETE\u64cd\u4f5c\u5220\u9664\u7684\u6d88\u606f\u88ab\u79f0\u4e3a\u5893\u7891\u8bb0\u5f55\u3002<br \/>\n\u5893\u7891\u8bb0\u5f55\u662f\u5728Kafka\u6d41\u4e2d\u7684\u8868\uff08KTable\uff09\u6216\u6570\u636e\u5e93\u8868\u4e2d\uff0c\u7528\u4e8e\u5220\u9664\u5177\u6709\u76f8\u540c\u952e\u7684\u8bb0\u5f55\u3002<\/p>\n<p>\u6709\u4e9b\u53d1\u9001\u6d88\u606f\u5230Kafka\u7684\u7ec4\u4ef6\uff0c\u4e3a\u4e86\u5b9e\u73b0\u5220\u9664\u529f\u80fd\uff0c\u53ef\u80fd\u9700\u8981\u5bf9\u6d88\u606f\u8fdb\u884c\u5904\u7406\uff0c\u81ea\u884c\u521b\u5efaTombstone\u8bb0\u5f55\u3002<br \/>\n\u8fd9\u662f\u901a\u8fc7\u5728\u6d77\u5916\u7f51\u7ad9\u4e0a\u8fdb\u884c\u8c03\u67e5\u3001\u8bd5\u9519\u591a\u6b21\u540e\u627e\u5230\u7684\u65b9\u6cd5\uff0c\u867d\u7136\u6709\u70b9\u4e13\u4e1a\uff0c\u4f46\u5982\u679c\u80fd\u5bf9\u67d0\u4eba\u6709\u6240\u5e2e\u52a9\u5c31\u597d\u4e86\u3002<\/p>\n<h2>\u6211\u6b63\u5728\u52aa\u529b\u505a\u7684\u4e8b\u60c5 (W\u01d2 zu\u00f2 de<\/h2>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d7aa6913a08637a696e49\/8-0.png\" alt=\"image.png\" \/><\/div>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">kafka-avro-console-producer\u3067Topic1\u306b\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u66f8\u304d\u8fbc\u307f\u307e\u3059\u3002\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u30ad\u30fc\u3092\u793a\u3059\u300cID\u300d\u3001\u66f4\u65b0\u533a\u5206\u3092\u793a\u3059\u9805\u76ee\u300cTYPE\u300d\u3001\u5024\u3092\u793a\u3059\u300cVAL\u300d\u3067\u69cb\u6210\u3057\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Topic1\u306b\u5bfe\u3059\u308b\u30b9\u30c8\u30ea\u30fc\u30e0Stream1\u3092\u4f5c\u6210\u3057\u3001\u52a0\u5de5\u51e6\u7406\u3092\u884c\u3046\u30b9\u30c8\u30ea\u30fc\u30e0\u304b\u3089\u53c2\u7167\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Stream2\u3092\u4f5c\u6210\u3057Topic1\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u66f4\u65b0\u533a\u5206\u300cTYPE\u300d\u304c&#8217;DEL&#8217;\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u3092Tombstone\u30ec\u30b3\u30fc\u30c9\u306b\u5909\u63db\u3057\u307e\u3059\u3002\u5909\u63db\u5f8c\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u306fTopic2\u306b\u66f8\u304d\u8fbc\u307e\u308c\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">Topic2\u306b\u5bfe\u3057\u3066JDBC Sink Connector\u3092\u30a2\u30bf\u30c3\u30c1\u3057\u3066DB\u5185\u306eTable1\u304c\u66f4\u65b0\u3055\u308c\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002\u7d50\u679c\u7684\u306b\u3001Talbe1\u306e\u30ec\u30b3\u30fc\u30c9\u304c\u4e0a\u8a18\u56f3\u3067\u793a\u3059\u901a\u308a\u306b\u306a\u3063\u3066\u3044\u308c\u3070\u6210\u529f\u3067\u3059\u3002<\/ul>\n<h2>\u4f7f\u7528kafka-avro-console-producer\u5411Topic1\u5199\u5165\u6d88\u606f\u3002<\/h2>\n<pre class=\"post-pre\"><code>kafka-avro-console-producer <span class=\"se\">\\<\/span>\r\n  <span class=\"nt\">--broker-list<\/span> localhost:9092 <span class=\"se\">\\<\/span>\r\n  <span class=\"nt\">--property<\/span> schema.registry.url<span class=\"o\">=<\/span>http:\/\/localhost:8081 <span class=\"se\">\\<\/span>\r\n  <span class=\"nt\">--topic<\/span> topic1 <span class=\"se\">\\<\/span>\r\n  <span class=\"nt\">--property<\/span> parse.key<span class=\"o\">=<\/span><span class=\"nb\">true<\/span> <span class=\"se\">\\<\/span>\r\n  <span class=\"nt\">--property<\/span> key.schema<span class=\"o\">=<\/span><span class=\"s1\">'{\"type\":\"record\",\r\n                          \"name\":\"myrecord\",\r\n                          \"fields\":[{\"name\":\"ID\",\"type\":\"string\"}]}'<\/span> <span class=\"se\">\\<\/span>\r\n  <span class=\"nt\">--property<\/span> key.separator<span class=\"o\">=<\/span><span class=\"s2\">\" \"<\/span> <span class=\"se\">\\<\/span>\r\n  <span class=\"nt\">--property<\/span> value.schema<span class=\"o\">=<\/span><span class=\"s1\">'{\"type\":\"record\",\r\n                            \"name\":\"myrecord\",\r\n                            \"fields\":[{\"name\":\"ID\",\"type\":\"string\"},\r\n                                      {\"name\":\"TYPE\",\"type\":\"string\"},\r\n                                      {\"name\":\"VAL\",\"type\":\"string\"}]}'<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"o\">{<\/span><span class=\"s2\">\"ID\"<\/span>:<span class=\"s2\">\"1\"<\/span><span class=\"o\">}<\/span> <span class=\"o\">{<\/span><span class=\"s2\">\"ID\"<\/span>:<span class=\"s2\">\"1\"<\/span>,<span class=\"s2\">\"TYPE\"<\/span>:<span class=\"s2\">\"INS\"<\/span>,<span class=\"s2\">\"VAL\"<\/span>:<span class=\"s2\">\"aa\"<\/span><span class=\"o\">}<\/span>\r\n<span class=\"o\">{<\/span><span class=\"s2\">\"ID\"<\/span>:<span class=\"s2\">\"2\"<\/span><span class=\"o\">}<\/span> <span class=\"o\">{<\/span><span class=\"s2\">\"ID\"<\/span>:<span class=\"s2\">\"2\"<\/span>,<span class=\"s2\">\"TYPE\"<\/span>:<span class=\"s2\">\"INS\"<\/span>,<span class=\"s2\">\"VAL\"<\/span>:<span class=\"s2\">\"bb\"<\/span><span class=\"o\">}<\/span>\r\n<span class=\"o\">{<\/span><span class=\"s2\">\"ID\"<\/span>:<span class=\"s2\">\"3\"<\/span><span class=\"o\">}<\/span> <span class=\"o\">{<\/span><span class=\"s2\">\"ID\"<\/span>:<span class=\"s2\">\"3\"<\/span>,<span class=\"s2\">\"TYPE\"<\/span>:<span class=\"s2\">\"INS\"<\/span>,<span class=\"s2\">\"VAL\"<\/span>:<span class=\"s2\">\"cc\"<\/span><span class=\"o\">}<\/span>\r\n<span class=\"o\">{<\/span><span class=\"s2\">\"ID\"<\/span>:<span class=\"s2\">\"2\"<\/span><span class=\"o\">}<\/span> <span class=\"o\">{<\/span><span class=\"s2\">\"ID\"<\/span>:<span class=\"s2\">\"2\"<\/span>,<span class=\"s2\">\"TYPE\"<\/span>:<span class=\"s2\">\"UPD\"<\/span>,<span class=\"s2\">\"VAL\"<\/span>:<span class=\"s2\">\"bbb\"<\/span><span class=\"o\">}<\/span>\r\n<span class=\"o\">{<\/span><span class=\"s2\">\"ID\"<\/span>:<span class=\"s2\">\"3\"<\/span><span class=\"o\">}<\/span> <span class=\"o\">{<\/span><span class=\"s2\">\"ID\"<\/span>:<span class=\"s2\">\"3\"<\/span>,<span class=\"s2\">\"TYPE\"<\/span>:<span class=\"s2\">\"DEL\"<\/span>,<span class=\"s2\">\"VAL\"<\/span>:<span class=\"s2\">\"cc\"<\/span><span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>ksql&gt; print <span class=\"s1\">'topic1'<\/span> from beginning<span class=\"p\">;<\/span>\r\nKey format: AVRO or KAFKA_STRING\r\nValue format: AVRO or KAFKA_STRING\r\nrowtime: 2023\/08\/14 11:21:32.621 Z, key: <span class=\"o\">{<\/span><span class=\"s2\">\"ID\"<\/span>: <span class=\"s2\">\"1\"<\/span><span class=\"o\">}<\/span>, value: <span class=\"o\">{<\/span><span class=\"s2\">\"ID\"<\/span>: <span class=\"s2\">\"1\"<\/span>, <span class=\"s2\">\"TYPE\"<\/span>: <span class=\"s2\">\"INS\"<\/span>, <span class=\"s2\">\"VAL\"<\/span>: <span class=\"s2\">\"aa\"<\/span><span class=\"o\">}<\/span>, partition: 0\r\nrowtime: 2023\/08\/14 11:21:38.634 Z, key: <span class=\"o\">{<\/span><span class=\"s2\">\"ID\"<\/span>: <span class=\"s2\">\"2\"<\/span><span class=\"o\">}<\/span>, value: <span class=\"o\">{<\/span><span class=\"s2\">\"ID\"<\/span>: <span class=\"s2\">\"2\"<\/span>, <span class=\"s2\">\"TYPE\"<\/span>: <span class=\"s2\">\"INS\"<\/span>, <span class=\"s2\">\"VAL\"<\/span>: <span class=\"s2\">\"bb\"<\/span><span class=\"o\">}<\/span>, partition: 0\r\nrowtime: 2023\/08\/14 11:21:44.117 Z, key: <span class=\"o\">{<\/span><span class=\"s2\">\"ID\"<\/span>: <span class=\"s2\">\"3\"<\/span><span class=\"o\">}<\/span>, value: <span class=\"o\">{<\/span><span class=\"s2\">\"ID\"<\/span>: <span class=\"s2\">\"3\"<\/span>, <span class=\"s2\">\"TYPE\"<\/span>: <span class=\"s2\">\"INS\"<\/span>, <span class=\"s2\">\"VAL\"<\/span>: <span class=\"s2\">\"cc\"<\/span><span class=\"o\">}<\/span>, partition: 0\r\nrowtime: 2023\/08\/14 11:21:51.773 Z, key: <span class=\"o\">{<\/span><span class=\"s2\">\"ID\"<\/span>: <span class=\"s2\">\"2\"<\/span><span class=\"o\">}<\/span>, value: <span class=\"o\">{<\/span><span class=\"s2\">\"ID\"<\/span>: <span class=\"s2\">\"2\"<\/span>, <span class=\"s2\">\"TYPE\"<\/span>: <span class=\"s2\">\"UPD\"<\/span>, <span class=\"s2\">\"VAL\"<\/span>: <span class=\"s2\">\"bbb\"<\/span><span class=\"o\">}<\/span>, partition: 0\r\nrowtime: 2023\/08\/14 11:21:56.328 Z, key: <span class=\"o\">{<\/span><span class=\"s2\">\"ID\"<\/span>: <span class=\"s2\">\"3\"<\/span><span class=\"o\">}<\/span>, value: <span class=\"o\">{<\/span><span class=\"s2\">\"ID\"<\/span>: <span class=\"s2\">\"3\"<\/span>, <span class=\"s2\">\"TYPE\"<\/span>: <span class=\"s2\">\"DEL\"<\/span>, <span class=\"s2\">\"VAL\"<\/span>: <span class=\"s2\">\"cc\"<\/span><span class=\"o\">}<\/span>, partition: 0\r\n<\/code><\/pre>\n<h2>\u521b\u5efaStream1\uff08\u51c6\u5907\u5904\u7406\u6d88\u606f\uff09<\/h2>\n<pre class=\"post-pre\"><code><span class=\"k\">CREATE<\/span> <span class=\"n\">STREAM<\/span> <span class=\"n\">STREAM1<\/span>\r\n  <span class=\"k\">WITH<\/span> <span class=\"p\">(<\/span><span class=\"n\">KAFKA_TOPIC<\/span><span class=\"o\">=<\/span><span class=\"s1\">'topic1'<\/span><span class=\"p\">,<\/span> <span class=\"n\">KEY_FORMAT<\/span><span class=\"o\">=<\/span><span class=\"s1\">'AVRO'<\/span><span class=\"p\">,<\/span> <span class=\"n\">VALUE_FORMAT<\/span><span class=\"o\">=<\/span><span class=\"s1\">'AVRO'<\/span><span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<h2>\u5728Stream2\u4e2d\uff0c\u5c06Topic1\u7684\u90e8\u5206\u4fe1\u606f\u52a0\u5de5\u6210\u5893\u7891\u8bb0\u5f55\u3002<\/h2>\n<pre class=\"post-pre\"><code><span class=\"k\">CREATE<\/span> <span class=\"n\">STREAM<\/span> <span class=\"n\">STREAM2<\/span>\r\n  <span class=\"k\">WITH<\/span> <span class=\"p\">(<\/span><span class=\"n\">WRAP_SINGLE_VALUE<\/span><span class=\"o\">=<\/span><span class=\"k\">FALSE<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"n\">KAFKA_TOPIC<\/span><span class=\"o\">=<\/span><span class=\"s1\">'topic2'<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"n\">KEY_FORMAT<\/span><span class=\"o\">=<\/span><span class=\"s1\">'AVRO'<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"n\">VALUE_FORMAT<\/span><span class=\"o\">=<\/span><span class=\"s1\">'AVRO'<\/span><span class=\"p\">)<\/span>\r\n  <span class=\"k\">AS<\/span> <span class=\"k\">SELECT<\/span>\r\n    <span class=\"n\">ROWKEY<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"k\">CASE<\/span> <span class=\"k\">WHEN<\/span> <span class=\"k\">TYPE<\/span><span class=\"o\">=<\/span><span class=\"s1\">'DEL'<\/span> \r\n      <span class=\"k\">THEN<\/span> <span class=\"k\">CAST<\/span><span class=\"p\">(<\/span><span class=\"k\">NULL<\/span> <span class=\"k\">AS<\/span> <span class=\"n\">STRUCT<\/span><span class=\"o\">&lt;<\/span><span class=\"n\">ID<\/span> <span class=\"n\">STRING<\/span><span class=\"p\">,<\/span> <span class=\"n\">VAL<\/span> <span class=\"n\">STRING<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">)<\/span>\r\n      <span class=\"k\">ELSE<\/span> <span class=\"n\">STRUCT<\/span><span class=\"p\">(<\/span><span class=\"n\">ID<\/span><span class=\"p\">:<\/span><span class=\"o\">=<\/span><span class=\"n\">STREAM1<\/span><span class=\"p\">.<\/span><span class=\"n\">ID<\/span><span class=\"p\">,<\/span> <span class=\"n\">VAL<\/span><span class=\"p\">:<\/span><span class=\"o\">=<\/span><span class=\"n\">STREAM1<\/span><span class=\"p\">.<\/span><span class=\"n\">VAL<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"k\">END<\/span>\r\n  <span class=\"k\">FROM<\/span>\r\n    <span class=\"n\">STREAM1<\/span>\r\n  <span class=\"n\">EMIT<\/span> <span class=\"n\">CHANGES<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">WITH\u53e5\u306e\u300cWRAP_SINGLE_VALUE\u300d\u304c\u30dd\u30a4\u30f3\u30c8\u3067\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>TRUE\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\uff09\uff1aksqlDB \u306f\u5217\u304c\u30ec\u30b3\u30fc\u30c9\u5185\u306e\u540d\u524d\u4ed8\u304d\u5217\u3068\u3057\u3066\u30b7\u30ea\u30a2\u30eb\u5316\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u671f\u5f85\u3057\u307e\u3059\u3002<br \/>\nFALSE\uff1aksqlDB \u306f\u5217\u304c\u533f\u540d\u5024\u3068\u3057\u3066\u30b7\u30ea\u30a2\u30eb\u5316\u3055\u308c\u3066\u3044\u308b\u3068\u60f3\u5b9a\u3057\u307e\u3059\u3002\u540d\u524d\u306e\u3064\u3044\u305f\u5217\u3067\u306f\u306a\u304fJSON\u69cb\u9020\u306b\u306a\u308bSTRUCT\u3082\u3057\u304f\u306fnull\u3092\u62bd\u51fa\u5bfe\u8c61\u3068\u3057\u3066SELECT\u3067\u6307\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>SELECT\u53e5\u306eCASE\u5f0f\u3082\u30dd\u30a4\u30f3\u30c8\u3067\u3059\u3002<\/p>\n<p>TYPE\u304c&#8217;DEL'(\u524a\u9664)\u306a\u3089\u3001\u30d0\u30ea\u30e5\u30fc\u90e8\u3092null\u306b\u3057\u307e\u3059\u3002\u901a\u5e38\u306eRDBMS\u306eSQL\u306e\u3088\u3046\u306bCASE\u5f0f\u306e\u8907\u6570\u6761\u4ef6\u7d50\u679c\u306f\u3069\u308c\u3082\u540c\u3058\u578b\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u30d0\u30ea\u30e5\u30fc\u306b\u8907\u6570\u306e\u9805\u76ee\u304c\u3042\u308b\u5834\u5408\u306f\u4e0a\u8a18\u306e\u3088\u3046\u306bNULL\u3092STRUCT\u578b\u3067CAST\u3057\u305f\u3082\u306e\u3092\u62bd\u51fa\u5bfe\u8c61\u3068\u3057\u307e\u3059\u3002<br \/>\nTYPE\u304c&#8217;DEL'(\u524a\u9664)\u4ee5\u5916\u306a\u3089\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u30d0\u30ea\u30e5\u30fc\u306b\u8907\u6570\u306e\u9805\u76ee\u304c\u3042\u308b\u5834\u5408\u306f\u3001\u4e0a\u8a18\u306e\u3088\u3046\u306bSTRUCT\u306b\u5024\u3092\u30bb\u30c3\u30c8\u3057\u305f\u7d50\u679c\u3092\u62bd\u51fa\u5bfe\u8c61\u3068\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>ksql&gt; print <span class=\"s1\">'topic2'<\/span> from beginning<span class=\"p\">;<\/span>\r\nKey format: AVRO or KAFKA_BIGINT or KAFKA_DOUBLE or KAFKA_STRING\r\nValue format: AVRO or KAFKA_STRING\r\nrowtime: 2023\/08\/14 11:21:32.621 Z, key: <span class=\"o\">{<\/span><span class=\"s2\">\"ID\"<\/span>: <span class=\"s2\">\"1\"<\/span><span class=\"o\">}<\/span>, value: <span class=\"o\">{<\/span><span class=\"s2\">\"ID\"<\/span>: <span class=\"s2\">\"1\"<\/span>, <span class=\"s2\">\"VAL\"<\/span>: <span class=\"s2\">\"aa\"<\/span><span class=\"o\">}<\/span>, partition: 0\r\nrowtime: 2023\/08\/14 11:21:38.634 Z, key: <span class=\"o\">{<\/span><span class=\"s2\">\"ID\"<\/span>: <span class=\"s2\">\"2\"<\/span><span class=\"o\">}<\/span>, value: <span class=\"o\">{<\/span><span class=\"s2\">\"ID\"<\/span>: <span class=\"s2\">\"2\"<\/span>, <span class=\"s2\">\"VAL\"<\/span>: <span class=\"s2\">\"bb\"<\/span><span class=\"o\">}<\/span>, partition: 0\r\nrowtime: 2023\/08\/14 11:21:44.117 Z, key: <span class=\"o\">{<\/span><span class=\"s2\">\"ID\"<\/span>: <span class=\"s2\">\"3\"<\/span><span class=\"o\">}<\/span>, value: <span class=\"o\">{<\/span><span class=\"s2\">\"ID\"<\/span>: <span class=\"s2\">\"3\"<\/span>, <span class=\"s2\">\"VAL\"<\/span>: <span class=\"s2\">\"cc\"<\/span><span class=\"o\">}<\/span>, partition: 0\r\nrowtime: 2023\/08\/14 11:21:51.773 Z, key: <span class=\"o\">{<\/span><span class=\"s2\">\"ID\"<\/span>: <span class=\"s2\">\"2\"<\/span><span class=\"o\">}<\/span>, value: <span class=\"o\">{<\/span><span class=\"s2\">\"ID\"<\/span>: <span class=\"s2\">\"2\"<\/span>, <span class=\"s2\">\"VAL\"<\/span>: <span class=\"s2\">\"bbb\"<\/span><span class=\"o\">}<\/span>, partition: 0\r\nrowtime: 2023\/08\/14 11:21:56.328 Z, key: <span class=\"o\">{<\/span><span class=\"s2\">\"ID\"<\/span>: <span class=\"s2\">\"3\"<\/span><span class=\"o\">}<\/span>, value: &lt;null&gt;, partition: 0\r\n<\/code><\/pre>\n<p>\u6211\u786e\u8ba4\u7b2c\u4e94\u6761\u6d88\u606f\u5df2\u7ecf\u8bb0\u5f55\u5728\u4e86Tombstone\u8bb0\u5f55\u4e2d\u3002<\/p>\n<h2>\u5728Topic2\u4e3b\u9898\u4e2d\uff0c\u901a\u8fc7JDBC Sink\u8fde\u63a5\u5668\u5c06\u66f4\u65b0\u53cd\u6620\u5230\u540e\u7eed\u7684\u534f\u4f5c\u6570\u636e\u5e93\u3002<\/h2>\n<pre class=\"post-pre\"><code>curl <span class=\"nt\">-X<\/span> PUT localhost:8083\/connectors\/table1-connector\/config <span class=\"nt\">-H<\/span> <span class=\"s2\">\"Content-Type: application\/json\"<\/span> <span class=\"se\">\\-<\/span><span class=\"nt\">-data<\/span> <span class=\"s1\">'{\r\n\"name\":\"table1-connector\",\r\n\"connector.class\":\"io.confluent.connect.jdbc.JdbcSinkConnector\",\r\n\"tasks.max\":\"1\",\r\n\"topics\":\"topic2\",\r\n\"key.converter\":\"io.confluent.connect.avro.AvroConverter\",\r\n\"key.converter.schema.registry.url\":\"http:\/\/localhost:8081\",\r\n\"value.converter\":\"io.confluent.connect.avro.AvroConverter\",\r\n\"value.converter.schema.registry.url\":\"http:\/\/localhost:8081\",\r\n\"connection.url\":\"jdbc:postgresql:\/\/localhost:5432\/testdb1\",\r\n\"connection.user\":\"******\",\r\n\"connection.password\":\"*********\",\r\n\"insert.mode\":\"upsert\",\r\n\"auto.create\":\"true\",\r\n\"delete.enabled\":\"true\",\r\n\"table.name.format\":\"public.table1\",\r\n\"pk.mode\":\"record_key\",\r\n\"pk.fields\":\"ID\",\r\n\"confluent.topic.bootstrap.servers\":\"localhost:9092\",\r\n\"confluent.topic.replication.factor\": \"1\"\r\n}'<\/span> | jq\r\n<\/code><\/pre>\n<p>\u5982\u679cJDBC Sink Connector\u6b63\u5e38\u8fd0\u884c\uff0c\u5219\u6570\u636e\u5c06\u6620\u5c04\u5230\u4e0b\u4e00\u4e2a\u6570\u636e\u5e93\u8868\u4e2d\u3002<br \/>\n\u4ee5\u4e0b\u662f\u6211\u4eec\u5728\u6b64\u6b21\u9a8c\u8bc1\u4e2d\u4f7f\u7528\u7684PostgreSQL\u6570\u636e\u5e93\u7684\u786e\u8ba4\u7ed3\u679c\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">testdb1<\/span><span class=\"o\">=#<\/span> <span class=\"err\">\\<\/span><span class=\"n\">d<\/span> <span class=\"n\">table1<\/span><span class=\"p\">;<\/span>\r\n              <span class=\"err\">\u30c6\u30fc\u30d6\u30eb<\/span> <span class=\"nv\">\"public.table1\"<\/span>\r\n <span class=\"err\">\u5217<\/span>  <span class=\"o\">|<\/span>  <span class=\"err\">\u578b<\/span>  <span class=\"o\">|<\/span> <span class=\"err\">\u7167\u5408\u9806\u5e8f<\/span> <span class=\"o\">|<\/span> <span class=\"k\">Null<\/span> <span class=\"err\">\u5024\u3092\u8a31\u5bb9<\/span> <span class=\"o\">|<\/span> <span class=\"err\">\u30c7\u30d5\u30a9\u30eb\u30c8<\/span> \r\n<span class=\"c1\">-----+------+----------+---------------+------------<\/span>\r\n <span class=\"n\">ID<\/span>  <span class=\"o\">|<\/span> <span class=\"nb\">text<\/span> <span class=\"o\">|<\/span>          <span class=\"o\">|<\/span> <span class=\"k\">not<\/span> <span class=\"k\">null<\/span>      <span class=\"o\">|<\/span> \r\n <span class=\"n\">VAL<\/span> <span class=\"o\">|<\/span> <span class=\"nb\">text<\/span> <span class=\"o\">|<\/span>          <span class=\"o\">|<\/span>               <span class=\"o\">|<\/span> \r\n<span class=\"err\">\u30a4\u30f3\u30c7\u30c3\u30af\u30b9<\/span><span class=\"p\">:<\/span>\r\n    <span class=\"nv\">\"table1_pkey\"<\/span> <span class=\"k\">PRIMARY<\/span> <span class=\"k\">KEY<\/span><span class=\"p\">,<\/span> <span class=\"n\">btree<\/span> <span class=\"p\">(<\/span><span class=\"nv\">\"ID\"<\/span><span class=\"p\">)<\/span>\r\n\r\n<span class=\"n\">testdb1<\/span><span class=\"o\">=#<\/span> <span class=\"k\">select<\/span> <span class=\"o\">*<\/span> <span class=\"k\">from<\/span> <span class=\"n\">table1<\/span><span class=\"p\">;<\/span>\r\n <span class=\"n\">ID<\/span> <span class=\"o\">|<\/span> <span class=\"n\">VAL<\/span> \r\n<span class=\"c1\">----+-----<\/span>\r\n <span class=\"mi\">1<\/span>  <span class=\"o\">|<\/span> <span class=\"n\">aa<\/span>\r\n <span class=\"mi\">2<\/span>  <span class=\"o\">|<\/span> <span class=\"n\">bbb<\/span>\r\n<span class=\"p\">(<\/span><span class=\"mi\">2<\/span> <span class=\"err\">\u884c<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d7aa6913a08637a696e49\/25-0.png\" alt=\"image.png\" \/><\/div>\n<p>\u5728ksqlDB\u4e2d\uff0c\u6211\u53ef\u4ee5\u5c06\u6d88\u606f\u8fdb\u884c\u52a0\u5de5\u5e76\u8f6c\u6362\u4e3aTombstone\u8bb0\u5f55\u3002<br \/>\n\u5728ksqlDB\u4e2d\uff0c\u4f60\u53ef\u4ee5\u901a\u8fc7\u7c7b\u4f3cSQL\u7684\u5b9e\u73b0\u8f7b\u677e\u5b9e\u73b0\u6b64\u7c7b\u529f\u80fd\uff0c\u800c\u65e0\u9700\u4f7f\u7528\u7f16\u7a0b\u8bed\u8a00\u6765\u5b9e\u73b0\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n<p>\u6211\u5e38\u5e38\u53c2\u8003\u7684\u7f51\u7ad9\uff1aksqlDB \u53c2\u8003\u8d44\u6599\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728Kafka\u4e2d\uff0c\u6d88\u606f\u53ef\u4ee5\u662f\u4e8b\u4ef6\u672c\u8eab\uff0c\u7531\u534f\u8c03\u65b9\u4ea7\u751f\uff0c\u4e5f\u53ef\u4ee5\u4f5c\u4e3aCDC\u6355\u83b7\u7684\u6e90\u8868\u7684\u53d8\u66f4\u5185\u5bb9\u7684\u8868\u793a\u65b9\u5f0f\u3002 \u5982\u679c\u7528\u4f5c\u6e90 [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-46792","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u4f7f\u7528ksqlDB\u5c06\u6d88\u606f\u8fdb\u884c\u52a0\u5de5\u5e76\u8f6c\u6362\u4e3aTombstone\u8bb0\u5f55\u7684\u6280\u5de7 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u4f7f\u7528ksqldb\u5c06\u6d88\u606f\u8fdb\u884c\u52a0\u5de5\u5e76\u8f6c\u6362\u4e3atombstone\u8bb0\u5f55\u7684\u6280\u5de7\u3002\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u4f7f\u7528ksqlDB\u5c06\u6d88\u606f\u8fdb\u884c\u52a0\u5de5\u5e76\u8f6c\u6362\u4e3aTombstone\u8bb0\u5f55\u7684\u6280\u5de7\" \/>\n<meta property=\"og:description\" content=\"\u5728Kafka\u4e2d\uff0c\u6d88\u606f\u53ef\u4ee5\u662f\u4e8b\u4ef6\u672c\u8eab\uff0c\u7531\u534f\u8c03\u65b9\u4ea7\u751f\uff0c\u4e5f\u53ef\u4ee5\u4f5c\u4e3aCDC\u6355\u83b7\u7684\u6e90\u8868\u7684\u53d8\u66f4\u5185\u5bb9\u7684\u8868\u793a\u65b9\u5f0f\u3002 \u5982\u679c\u7528\u4f5c\u6e90 [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u4f7f\u7528ksqldb\u5c06\u6d88\u606f\u8fdb\u884c\u52a0\u5de5\u5e76\u8f6c\u6362\u4e3atombstone\u8bb0\u5f55\u7684\u6280\u5de7\u3002\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-09-04T05:31:06+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-05-04T11:04:55+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d7aa6913a08637a696e49\/1-0.png\" \/>\n<meta name=\"author\" content=\"\u79d1, \u9896\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u79d1, \u9896\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 \u5206\" \/>\n<script type=\"application\/ld+json\" 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