{"id":46835,"date":"2022-11-17T03:27:01","date_gmt":"2022-11-02T10:21:37","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8ksqldb%e4%b8%ad%e7%bb%99kafka%e6%b6%88%e6%81%af%e6%b7%bb%e5%8a%a0%e9%94%ae%e7%9a%84%e6%96%b9%e6%b3%95%e3%80%82\/"},"modified":"2024-04-29T01:04:13","modified_gmt":"2024-04-28T17:04:13","slug":"%e5%9c%a8ksqldb%e4%b8%ad%e7%bb%99kafka%e6%b6%88%e6%81%af%e6%b7%bb%e5%8a%a0%e9%94%ae%e7%9a%84%e6%96%b9%e6%b3%95%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8ksqldb%e4%b8%ad%e7%bb%99kafka%e6%b6%88%e6%81%af%e6%b7%bb%e5%8a%a0%e9%94%ae%e7%9a%84%e6%96%b9%e6%b3%95%e3%80%82\/","title":{"rendered":"\u5728ksqlDB\u4e2d\u7ed9Kafka\u6d88\u606f\u6dfb\u52a0\u952e\u7684\u65b9\u6cd5"},"content":{"rendered":"<p>Kafka\u7684\u6d88\u606f\u7531\u5934\u90e8\u3001\u952e\u548c\u503c\u7ec4\u6210\u3002<br \/>\n\u5f53\u9700\u8981\u5728\u4e3b\u9898\u5185\u552f\u4e00\u6807\u8bc6\u6d88\u606f\u3001\u542f\u7528\u6309\u952e\u6700\u65b0\u6d88\u606f\u3001\u6839\u636e\u4e3b\u9898\u6d88\u606f\u66f4\u65b0\u6216\u5220\u9664\u6570\u636e\u5e93\u8bb0\u5f55\u65f6\uff0c\u952e\u5c31\u53d8\u5f97\u91cd\u8981\u8d77\u6765\u3002<\/p>\n<p>\u5982\u679c\u6e90\u670d\u52a1\u6216\u8fde\u63a5\u5668\u4e0d\u5904\u7406\u6d88\u606f\u7684\u952e\uff0c\u5219\u5982\u679c\u4e0d\u8fdb\u884c\u4efb\u4f55\u64cd\u4f5c\uff0c\u5c06\u5411Kafka\u53d1\u9001\u6ca1\u6709\u952e\u7684\u6d88\u606f\u3002<br \/>\n\u4e0b\u9762\u662f\u4f7f\u7528ksqlDB\u6d41\u4e3a\u6d88\u606f\u6dfb\u52a0\u952e\u7684\u793a\u4f8b\uff0c\u5c06Db2\u4f5c\u4e3a\u6570\u636e\u5e93\uff0cKafka\u4f7f\u7528Confluent\u3002<\/p>\n<h2>\u4f60\u6b63\u5728\u5c1d\u8bd5\u505a\u4ec0\u4e48\uff1f<\/h2>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d7ad9913a08637a6976f2\/3-0.png\" alt=\"image.png\" \/><\/div>\n<h2>\u521b\u5efa\u4e00\u4e2a\u9488\u5bf9Topic1\u4e2d\u6ca1\u6709\u952e\u7684\u6d88\u606f\u7684Stream1\u3002<\/h2>\n<p>\u4ee5\u4e0b\u662fTopic1\u7684\u5185\u5bb9\uff1a<br \/>\n\u53ef\u4ee5\u786e\u8ba4\u6ca1\u6709\u94a5\u5319\u3002<\/p>\n<pre class=\"post-pre\"><code>ksql&gt; print <span class=\"s1\">'topic1'<\/span> from beginning<span class=\"p\">;<\/span>\r\nKey format: \u00af<span class=\"se\">\\_<\/span><span class=\"o\">(<\/span>\u30c4<span class=\"o\">)<\/span>_\/\u00af - no data processed\r\nValue format: AVRO or KAFKA_STRING\r\nrowtime: 2023\/08\/14 06:38:11.074 Z, key: &lt;null&gt;, value: <span class=\"o\">{<\/span><span class=\"s2\">\"col1\"<\/span>: <span class=\"s2\">\"a1\"<\/span>, <span class=\"s2\">\"col2\"<\/span>: <span class=\"s2\">\"a\"<\/span>, <span class=\"s2\">\"col3\"<\/span>: <span class=\"s2\">\"test1\"<\/span><span class=\"o\">}<\/span>, partition: 0\r\nrowtime: 2023\/08\/14 06:38:16.039 Z, key: &lt;null&gt;, value: <span class=\"o\">{<\/span><span class=\"s2\">\"col1\"<\/span>: <span class=\"s2\">\"a2\"<\/span>, <span class=\"s2\">\"col2\"<\/span>: <span class=\"s2\">\"aa\"<\/span>, <span class=\"s2\">\"col3\"<\/span>: <span class=\"s2\">\"test2\"<\/span><span class=\"o\">}<\/span>, partition: 0\r\nrowtime: 2023\/08\/14 06:38:27.083 Z, key: &lt;null&gt;, value: <span class=\"o\">{<\/span><span class=\"s2\">\"col1\"<\/span>: <span class=\"s2\">\"a3\"<\/span>, <span class=\"s2\">\"col2\"<\/span>: <span class=\"s2\">\"aaa\"<\/span>, <span class=\"s2\">\"col3\"<\/span>: <span class=\"s2\">\"test3\"<\/span><span class=\"o\">}<\/span>, partition: 0\r\n<\/code><\/pre>\n<p>\u4e3a\u4e86\u5728ksqlDB\u7684\u6d41\u4e2d\u5904\u7406\u6d88\u606f\uff0c\u9700\u8981\u521b\u5efa\u4e00\u4e2a\u5bf9\u5e94\u539f\u59cb\u4e3b\u9898\u7684\u6d41\uff0c\u4ee5\u4fbf\u4ece\u5904\u7406\u6d41\u4e2d\u5f15\u7528\u5b83\u8fdb\u884c\u52a0\u5de5\u5904\u7406\u3002<br \/>\nStream1\u5bf9\u4e8e\u539f\u59cb\u4e3b\u9898\u7684\u5b9a\u4e49\u5185\u5bb9\u5982\u4e0b\u6240\u793a\uff1a<\/p>\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\">VALUE_FORMAT<\/span><span class=\"o\">=<\/span><span class=\"s1\">'AVRO'<\/span><span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"n\">ksql<\/span><span class=\"o\">&gt;<\/span> <span class=\"k\">SELECT<\/span> <span class=\"o\">*<\/span> <span class=\"k\">FROM<\/span> <span class=\"n\">STREAM1<\/span><span class=\"p\">;<\/span>\r\n<span class=\"o\">+<\/span><span class=\"c1\">-------------------------------+-------------------------------+-------------------------------+<\/span>\r\n<span class=\"o\">|<\/span><span class=\"n\">COL1<\/span>                           <span class=\"o\">|<\/span><span class=\"n\">COL2<\/span>                           <span class=\"o\">|<\/span><span class=\"n\">COL3<\/span>                           <span class=\"o\">|<\/span>\r\n<span class=\"o\">+<\/span><span class=\"c1\">-------------------------------+-------------------------------+-------------------------------+<\/span>\r\n<span class=\"o\">|<\/span><span class=\"n\">a1<\/span>                             <span class=\"o\">|<\/span><span class=\"n\">a<\/span>                              <span class=\"o\">|<\/span><span class=\"n\">test1<\/span>                          <span class=\"o\">|<\/span>\r\n<span class=\"o\">|<\/span><span class=\"n\">a2<\/span>                             <span class=\"o\">|<\/span><span class=\"n\">aa<\/span>                             <span class=\"o\">|<\/span><span class=\"n\">test2<\/span>                          <span class=\"o\">|<\/span>\r\n<span class=\"o\">|<\/span><span class=\"n\">a3<\/span>                             <span class=\"o\">|<\/span><span class=\"n\">aaa<\/span>                            <span class=\"o\">|<\/span><span class=\"n\">test3<\/span>                          <span class=\"o\">|<\/span>\r\n<\/code><\/pre>\n<h2>\u521b\u5efa\u4e00\u4e2a\u540d\u4e3aStream2\u7684\u6d41\uff0c\u901a\u8fc7\u83b7\u53d6Stream1\u7684\u6d88\u606f\u5e76\u5728\u6d88\u606f\u4e2d\u6dfb\u52a0\u952e\u503c\u3002<\/h2>\n<p>\u521b\u5efa\u4e00\u4e2a\u8fdb\u884c\u52a0\u5de5\u5904\u7406\u7684\u6d41\u3002<br \/>\n\u5728\u6d41\u7684\u5b9a\u4e49\u4e2d\uff0c\u6307\u5b9a\u4e00\u4e2a\u4e3b\u9898\u6765\u5199\u5165\u52a0\u5de5\u540e\u7684\u6d88\u606f\u3002<\/p>\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\">KAFKA_TOPIC<\/span><span class=\"o\">=<\/span><span class=\"s1\">'topic2'<\/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  <span class=\"k\">AS<\/span> <span class=\"k\">SELECT<\/span>\r\n    <span class=\"n\">STRUCT<\/span><span class=\"p\">(<\/span><span class=\"n\">COL1<\/span><span class=\"p\">:<\/span><span class=\"o\">=<\/span><span class=\"n\">STREAM1<\/span><span class=\"p\">.<\/span><span class=\"n\">COL1<\/span><span class=\"p\">)<\/span> <span class=\"k\">AS<\/span> <span class=\"n\">COL1<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"n\">STREAM1<\/span><span class=\"p\">.<\/span><span class=\"n\">COL2<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"n\">STREAM1<\/span><span class=\"p\">.<\/span><span class=\"n\">COL3<\/span>\r\n  <span class=\"k\">FROM<\/span>\r\n    <span class=\"n\">STREAM1<\/span>\r\n  <span class=\"k\">PARTITION<\/span> <span class=\"k\">BY<\/span>\r\n    <span class=\"n\">STRUCT<\/span><span class=\"p\">(<\/span><span class=\"n\">COL1<\/span><span class=\"p\">:<\/span><span class=\"o\">=<\/span><span class=\"n\">STREAM1<\/span><span class=\"p\">.<\/span><span class=\"n\">COL1<\/span><span class=\"p\">)<\/span>\r\n  <span class=\"n\">EMIT<\/span> <span class=\"n\">CHANGES<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"n\">ksql<\/span><span class=\"o\">&gt;<\/span> <span class=\"k\">SELECT<\/span> <span class=\"o\">*<\/span> <span class=\"k\">FROM<\/span> <span class=\"n\">STREAM2<\/span><span class=\"p\">;<\/span>\r\n<span class=\"o\">+<\/span><span class=\"c1\">-------------------------------+-------------------------------+-------------------------------+<\/span>\r\n<span class=\"o\">|<\/span><span class=\"n\">COL1<\/span>                           <span class=\"o\">|<\/span><span class=\"n\">COL2<\/span>                           <span class=\"o\">|<\/span><span class=\"n\">COL3<\/span>                           <span class=\"o\">|<\/span>\r\n<span class=\"o\">+<\/span><span class=\"c1\">-------------------------------+-------------------------------+-------------------------------+<\/span>\r\n<span class=\"o\">|<\/span><span class=\"p\">{<\/span><span class=\"n\">COL1<\/span><span class=\"o\">=<\/span><span class=\"n\">a1<\/span><span class=\"p\">}<\/span>                      <span class=\"o\">|<\/span><span class=\"n\">a<\/span>                              <span class=\"o\">|<\/span><span class=\"n\">test1<\/span>                          <span class=\"o\">|<\/span>\r\n<span class=\"o\">|<\/span><span class=\"p\">{<\/span><span class=\"n\">COL1<\/span><span class=\"o\">=<\/span><span class=\"n\">a2<\/span><span class=\"p\">}<\/span>                      <span class=\"o\">|<\/span><span class=\"n\">aa<\/span>                             <span class=\"o\">|<\/span><span class=\"n\">test2<\/span>                          <span class=\"o\">|<\/span>\r\n<span class=\"o\">|<\/span><span class=\"p\">{<\/span><span class=\"n\">COL1<\/span><span class=\"o\">=<\/span><span class=\"n\">a3<\/span><span class=\"p\">}<\/span>                      <span class=\"o\">|<\/span><span class=\"n\">aaa<\/span>                            <span class=\"o\">|<\/span><span class=\"n\">test3<\/span>                          <span class=\"o\">|<\/span>\r\n<\/code><\/pre>\n<p>\u53ef\u4ee5\u786e\u8ba4\u901a\u8fc7Stream2\u5411Topic2\u5199\u5165\u4e86\u5e26\u6709\u952e\u7684\u6d88\u606f\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 HOPPING<span class=\"o\">(<\/span>KAFKA_STRING<span class=\"o\">)<\/span> or TUMBLING<span class=\"o\">(<\/span>KAFKA_STRING<span class=\"o\">)<\/span> or KAFKA_STRING\r\nValue format: AVRO or KAFKA_STRING\r\nrowtime: 2023\/08\/14 06:38:11.074 Z, key: <span class=\"o\">{<\/span><span class=\"s2\">\"COL1\"<\/span>: <span class=\"s2\">\"a1\"<\/span><span class=\"o\">}<\/span>, value: <span class=\"o\">{<\/span><span class=\"s2\">\"COL2\"<\/span>: <span class=\"s2\">\"a\"<\/span>, <span class=\"s2\">\"COL3\"<\/span>: <span class=\"s2\">\"test1\"<\/span><span class=\"o\">}<\/span>, partition: 0\r\nrowtime: 2023\/08\/14 06:38:16.039 Z, key: <span class=\"o\">{<\/span><span class=\"s2\">\"COL1\"<\/span>: <span class=\"s2\">\"a2\"<\/span><span class=\"o\">}<\/span>, value: <span class=\"o\">{<\/span><span class=\"s2\">\"COL2\"<\/span>: <span class=\"s2\">\"aa\"<\/span>, <span class=\"s2\">\"COL3\"<\/span>: <span class=\"s2\">\"test2\"<\/span><span class=\"o\">}<\/span>, partition: 0\r\nrowtime: 2023\/08\/14 06:38:27.083 Z, key: <span class=\"o\">{<\/span><span class=\"s2\">\"COL1\"<\/span>: <span class=\"s2\">\"a3\"<\/span><span class=\"o\">}<\/span>, value: <span class=\"o\">{<\/span><span class=\"s2\">\"COL2\"<\/span>: <span class=\"s2\">\"aaa\"<\/span>, <span class=\"s2\">\"COL3\"<\/span>: <span class=\"s2\">\"test3\"<\/span><span class=\"o\">}<\/span>, partition: 0\r\n<\/code><\/pre>\n<p>\u6211\u4eec\u53ef\u4ee5\u4eceTopic2\u7684\u67b6\u6784\u4e2d\u786e\u8ba4\u4e5f\u6709\u952e\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$ <\/span>curl <span class=\"nt\">-sX<\/span> GET http:\/\/localhost:8081\/subjects\/topic2-key\/versions\/latest | jq .schema <span class=\"nt\">-r<\/span> | jq\r\n<span class=\"o\">{<\/span>\r\n  <span class=\"s2\">\"type\"<\/span>: <span class=\"s2\">\"record\"<\/span>,\r\n  <span class=\"s2\">\"name\"<\/span>: <span class=\"s2\">\"Stream2Key\"<\/span>,\r\n  <span class=\"s2\">\"namespace\"<\/span>: <span class=\"s2\">\"io.confluent.ksql.avro_schemas\"<\/span>,\r\n  <span class=\"s2\">\"fields\"<\/span>: <span class=\"o\">[<\/span>\r\n    <span class=\"o\">{<\/span>\r\n      <span class=\"s2\">\"name\"<\/span>: <span class=\"s2\">\"COL1\"<\/span>,\r\n      <span class=\"s2\">\"type\"<\/span>: <span class=\"o\">[<\/span>\r\n        <span class=\"s2\">\"null\"<\/span>,\r\n        <span class=\"s2\">\"string\"<\/span>\r\n      <span class=\"o\">]<\/span>,\r\n      <span class=\"s2\">\"default\"<\/span>: null\r\n    <span class=\"o\">}<\/span>\r\n  <span class=\"o\">]<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"nv\">$ <\/span>curl <span class=\"nt\">-sX<\/span> GET http:\/\/localhost:8081\/subjects\/topic2-value\/versions\/latest | jq .schema <span class=\"nt\">-r<\/span> | jq\r\n<span class=\"o\">{<\/span>\r\n  <span class=\"s2\">\"type\"<\/span>: <span class=\"s2\">\"record\"<\/span>,\r\n  <span class=\"s2\">\"name\"<\/span>: <span class=\"s2\">\"KsqlDataSourceSchema\"<\/span>,\r\n  <span class=\"s2\">\"namespace\"<\/span>: <span class=\"s2\">\"io.confluent.ksql.avro_schemas\"<\/span>,\r\n  <span class=\"s2\">\"fields\"<\/span>: <span class=\"o\">[<\/span>\r\n    <span class=\"o\">{<\/span>\r\n      <span class=\"s2\">\"name\"<\/span>: <span class=\"s2\">\"COL2\"<\/span>,\r\n      <span class=\"s2\">\"type\"<\/span>: <span class=\"o\">[<\/span>\r\n        <span class=\"s2\">\"null\"<\/span>,\r\n        <span class=\"s2\">\"string\"<\/span>\r\n      <span class=\"o\">]<\/span>,\r\n      <span class=\"s2\">\"default\"<\/span>: null\r\n    <span class=\"o\">}<\/span>,\r\n    <span class=\"o\">{<\/span>\r\n      <span class=\"s2\">\"name\"<\/span>: <span class=\"s2\">\"COL3\"<\/span>,\r\n      <span class=\"s2\">\"type\"<\/span>: <span class=\"o\">[<\/span>\r\n        <span class=\"s2\">\"null\"<\/span>,\r\n        <span class=\"s2\">\"string\"<\/span>\r\n      <span class=\"o\">]<\/span>,\r\n      <span class=\"s2\">\"default\"<\/span>: null\r\n    <span class=\"o\">}<\/span>\r\n  <span class=\"o\">]<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u901a\u8fc7ksqlDB\u7684\u6d41\u5904\u7406\uff0c\u53ef\u4ee5\u5bf9\u6ca1\u6709\u952e\u7684\u6d88\u606f\u8fdb\u884c\u52a0\u5de5\uff0c\u5e76\u5c06\u6709\u952e\u7684\u6d88\u606f\u5199\u5165\u5230Topic\u4e2d\u3002\u5982\u679c\u5728\u5df2\u5199\u5165\u6709\u952e\u6d88\u606f\u7684Topic\u4e0a\u4f7f\u7528JDBC Sink Connector\uff0c\u5c31\u53ef\u4ee5\u6839\u636e\u6d88\u606f\u8fdb\u884cINSERT\u3001UPDATE\u548cDELETE\u64cd\u4f5c\uff0c\u5b9e\u73b0\u4e0e\u540e\u7eed\u534f\u4f5c\u6570\u636e\u5e93\u4e2d\u7684\u8868\u7684\u4ea4\u4e92\u3002<\/p>\n<p>\u5982\u679c\u4f7f\u7528ksqlDB\uff0c\u4f60\u53ef\u4ee5\u8f7b\u677e\u5730\u5b9e\u73b0\u8fd9\u6837\u7684\u529f\u80fd\uff0c\u800c\u4e0d\u9700\u8981\u4f7f\u7528\u7f16\u7a0b\u8bed\u8a00\u6765\u5b9e\u73b0\u5e94\u7528\u7a0b\u5e8f\uff0c\u53ea\u9700\u4f7f\u7528\u7c7b\u4f3cSQL\u7684\u5b9e\u73b0\u65b9\u5f0f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Kafka\u7684\u6d88\u606f\u7531\u5934\u90e8\u3001\u952e\u548c\u503c\u7ec4\u6210\u3002 \u5f53\u9700\u8981\u5728\u4e3b\u9898\u5185\u552f\u4e00\u6807\u8bc6\u6d88\u606f\u3001\u542f\u7528\u6309\u952e\u6700\u65b0\u6d88\u606f\u3001\u6839\u636e\u4e3b\u9898\u6d88\u606f\u66f4\u65b0\u6216\u5220\u9664\u6570\u636e [&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-46835","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>\u5728ksqlDB\u4e2d\u7ed9Kafka\u6d88\u606f\u6dfb\u52a0\u952e\u7684\u65b9\u6cd5 - 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\/\u5728ksqldb\u4e2d\u7ed9kafka\u6d88\u606f\u6dfb\u52a0\u952e\u7684\u65b9\u6cd5\u3002\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta 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