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\u53d1\u9001\u3002\u7531 walsender \u53d1\u9001\u65f6\uff0c\u5b83\u4eec\u88ab\u5c01\u88c5\u5728\u590d\u5236\u534f\u8bae\u7684 WAL \u6d88\u606f\u4e2d\uff08\u53c2\u89c1\u7b2c 54.4 \u8282\uff09\uff0c\u6d88\u606f\u6d41\u7a0b\u901a\u5e38\u4e0e\u7269\u7406\u590d\u5236\u76f8\u540c\u3002Stream Start\u3001Stream Stop\u3001Stream Commit \u548c Stream Abort \u4ece\u534f\u8bae\u7248\u672c 2 \u8d77\u53ef\u7528\u3002Begin Prepare\u3001Prepare\u3001Commit Prepared\u3001Rollback Prepared \u548c Stream Prepare \u4ece\u534f\u8bae\u7248\u672c 3 \u8d77\u53ef\u7528\u3002\u4ee5\u4e0b\u6d88\u606f\u90e8\u5206\u4e3a\u4e0a\u8ff0\u6d88\u606f\u6240\u5171\u7528\u3002"]}], "signature": "Origin", "description": ["\u903b\u8f91\u590d\u5236 Origin \u683c\u5f0f\uff0c\u8868\u793a\u590d\u5236\u6e90\u6d88\u606f\u3002"], "manual_html": "<dl><dd>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\">Byte1('O')</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5c06\u8be5\u6d88\u606f\u6807\u8bc6\u4e3a 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Identifies the message as an origin message.", "/category": "Logical replication formats", "/versions/20/description/0": "Logical replication Origin format. 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In the case of a walsender, they are encapsulated inside replication protocol WAL messages as described in Section 54.4 , and generally obey the same message flow as physical replication. The following messages (Stream Start, Stream Stop, Stream Commit, and Stream Abort) are available since protocol version 2. The following messages (Begin Prepare, Prepare, Commit Prepared, Rollback Prepared, Stream Prepare) are available since protocol version 3. 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Identifies the message as an origin message.", "/versions/18/facts/0/label": "Layer", "/versions/18/facts/0/value": "Logical replication payload; distinct from the frontend/backend message envelope", "/versions/18/facts/1/label": "First field", "/versions/18/tables/0/title": "Fields in documented order", "/versions/18/related/0/label": "Streaming replication protocol", "/versions/18/related/1/label": "Logical Decoding Plugins", "/versions/18/sections/0/title": "Protocol context", "/versions/18/tables/0/rows/0/c2": "Identifies the message as an origin message.", "/versions/18/tables/0/rows/1/c2": "The LSN of the commit on the origin server.", "/versions/18/tables/0/rows/2/c1": "String", "/versions/18/tables/0/rows/2/c2": "Name of the origin.", "/versions/18/sections/0/paragraphs/0": "This section describes the detailed format of each logical replication message. These messages are either returned by the replication slot SQL interface or are sent by a walsender. In the case of a walsender, they are encapsulated inside replication protocol WAL messages as described in Section 54.4 , and generally obey the same message flow as physical replication. The following messages (Stream Start, Stream Stop, Stream Commit, and Stream Abort) are available since protocol version 2. The following messages (Begin Prepare, Prepare, Commit Prepared, Rollback Prepared, Stream Prepare) are available since protocol version 3. 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