{"kind": "protocol", "major": "18", "item": {"slug": "logical-stream-prepare", "name": "Stream Prepare (logical replication)", "name_zh": "", "category": "\u903b\u8f91\u590d\u5236\u683c\u5f0f", "summary": "\u903b\u8f91\u590d\u5236 Stream Prepare \u683c\u5f0f\uff0c\u8868\u793a\u6d41\u5f0f\u4e8b\u52a1\u9884\u5907\u6d88\u606f\u3002", "aliases": ["Stream Prepare"], "content_hash": "3d53c1b89cd729e5899d27af7970b3d64a3c2022f7c9835be98b83e2f6866824", "versions": {"15": {"facts": [{"label": "\u5c42\u6b21", "value": "\u903b\u8f91\u590d\u5236\u8f7d\u8377\uff0c\u4e0e\u524d\u540e\u7aef\u6d88\u606f\u5c01\u88c5\u5206\u5f00\u3002"}, {"label": "\u9996\u4e2a\u5b57\u6bb5", "value": "Byte1('p')"}], "fields": [{"format": "Byte1('p')", "description": "Identifies the message as a stream prepared transaction message."}, {"format": "Int8(0)", "description": "Flags; currently unused."}, {"format": "Int64 (XLogRecPtr)", "description": "The LSN of the prepare."}, {"format": "Int64 (XLogRecPtr)", "description": "The end LSN of the prepared transaction."}, {"format": "Int64 (TimestampTz)", "description": "Prepare timestamp of the transaction. The value is in number of microseconds since PostgreSQL epoch (2000-01-01)."}, {"format": "Int32 (TransactionId)", "description": "Xid of the transaction."}, {"format": "String", "description": "The user defined GID of the prepared transaction."}], "tables": [{"key": "fields", "rows": [{"c0": "1", "c1": "Byte1('p')", "c2": "\u5c06\u8be5\u6d88\u606f\u6807\u8bc6\u4e3a Stream Prepare \u6d88\u606f\u3002"}, {"c0": "2", "c1": "Int8(0)", "c2": "\u6807\u5fd7\uff1b\u76ee\u524d\u672a\u4f7f\u7528\u3002"}, {"c0": "3", "c1": "Int64 (XLogRecPtr)", "c2": "PREPARE \u7684 LSN\u3002"}, {"c0": "4", "c1": "Int64 (XLogRecPtr)", "c2": "\u9884\u5907\u4e8b\u52a1\u7684\u7ed3\u675f LSN\u3002"}, {"c0": "5", "c1": "Int64 (TimestampTz)", "c2": "\u4e8b\u52a1\u8fdb\u5165\u9884\u5907\u72b6\u6001\u7684\u65f6\u95f4\u6233\u3002\u5176\u503c\u4e3a\u81ea PostgreSQL \u7eaa\u5143\uff082000-01-01\uff09\u8d77\u7ecf\u8fc7\u7684\u5fae\u79d2\u6570\u3002"}, {"c0": "6", "c1": "Int32 (TransactionId)", "c2": "\u4e8b\u52a1\u7684 Xid\u3002"}, {"c0": "7", "c1": "\u5b57\u7b26\u4e32", "c2": "\u9884\u5907\u4e8b\u52a1\u7684\u7528\u6237\u5b9a\u4e49 GID\u3002"}], "title": "\u6309\u624b\u518c\u987a\u5e8f\u6392\u5217\u7684\u5b57\u6bb5", "columns": [{"key": "c0", "label": "\u4f4d\u7f6e"}, {"key": "c1", "label": "\u683c\u5f0f"}, {"key": "c2", "label": "\u542b\u4e49"}]}], "related": [{"url": "/docs/15/protocol-replication.html", "label": "\u6d41\u590d\u5236\u534f\u8bae"}, {"url": "/wiki/decode/?v=15", "label": "\u903b\u8f91\u89e3\u7801\u63d2\u4ef6"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v15.19/postgresql-15.19.tar.bz2", "label": "15.19", "major": "15", "channel": "stable", "revision": "e1a64a87a46b825b88c082e4518161a47aab53c45694964f8ba1df28f7859f89"}, "sources": [{"url": "https://pg.center/docs/15/protocol-logicalrep-message-formats.html#PROTOCOL-LOGICALREP-MESSAGE-FORMATS-STREAM-PREPARE", "path": "protocol-logicalrep-message-formats.html", "label": "PostgreSQL 15 English manual", "sha256": "dce726e09e3bfedfcea89e211772f1afb48a00fd03f33fb94ce66e6d6e2938f5", "language": "en", "original_url": "/docs/15/protocol-logicalrep-message-formats.html#PROTOCOL-LOGICALREP-MESSAGE-FORMATS-STREAM-PREPARE"}], "sections": [{"title": "\u534f\u8bae\u4e0a\u4e0b\u6587", "paragraphs": ["\u672c\u8282\u8bf4\u660e\u5404\u903b\u8f91\u590d\u5236\u6d88\u606f\u7684\u8be6\u7ec6\u683c\u5f0f\u3002\u8fd9\u4e9b\u6d88\u606f\u7531\u590d\u5236\u69fd SQL \u63a5\u53e3\u8fd4\u56de\uff0c\u6216\u7531 walsender \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 55.4 \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": "Stream Prepare", "description": ["\u903b\u8f91\u590d\u5236 Stream Prepare \u683c\u5f0f\uff0c\u8868\u793a\u6d41\u5f0f\u4e8b\u52a1\u9884\u5907\u6d88\u606f\u3002"], "manual_html": "<dl><dd>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\">Byte1('p')</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5c06\u8be5\u6d88\u606f\u6807\u8bc6\u4e3a Stream Prepare \u6d88\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int8(0)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6807\u5fd7\uff1b\u76ee\u524d\u672a\u4f7f\u7528\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int64 (XLogRecPtr)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>PREPARE \u7684 LSN\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int64 (XLogRecPtr)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u9884\u5907\u4e8b\u52a1\u7684\u7ed3\u675f LSN\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int64 (TimestampTz)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e8b\u52a1\u8fdb\u5165\u9884\u5907\u72b6\u6001\u7684\u65f6\u95f4\u6233\u3002\u5176\u503c\u4e3a\u81ea PostgreSQL \u7eaa\u5143\uff082000-01-01\uff09\u8d77\u7ecf\u8fc7\u7684\u5fae\u79d2\u6570\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int32 (TransactionId)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e8b\u52a1\u7684 Xid\u3002</p>\n</p>\n</dd>\n<dt lang=\"zh\">\u5b57\u7b26\u4e32</dt>\n<dd>\n<p lang=\"zh\">\n<p>\u9884\u5907\u4e8b\u52a1\u7684\u7528\u6237\u5b9a\u4e49 GID\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n</dd></dl>", "manual_path": "/docs/15/protocol-logicalrep-message-formats.html", "localization": {"status": "complete", "sources": [{"url": "/docs/15/datatype-json.html", "method": "same-major semantic node", "sha256": "1de5ac3fcff666e4a6ac070ff5320df19ce2a518ff29c894afc9071d51b938ff", "language": "zh", "matched_nodes": ["#DATATYPE-JSON/div[19]/pre[27]/em[4]/code[0]"]}, {"url": "/docs/15/protocol-logicalrep-message-formats.html", "method": "same-major semantic node", "sha256": "55b157cac874170762ba43193ac136e49b632d59d2a691073af2f408a7e2b51c", "language": "zh", "matched_nodes": ["#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[2]/dl[0]/dd[1]/div[0]/dl[0]/dd[7]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[2]/dl[0]/dd[5]/div[0]/dl[0]/dd[3]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[1]/div[0]/dl[0]/dd[11]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[1]/div[0]/dl[0]/dd[3]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[1]/div[0]/dl[0]/dd[5]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[1]/div[0]/dl[0]/dd[7]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[9]/div[0]/dl[0]/dd[1]"]}], "language": "zh", "original_text": {"/versions/15/description/0": "Logical replication Stream Prepare format. Identifies the message as a stream prepared transaction message.", "/versions/15/facts/0/label": "Layer", "/versions/15/facts/0/value": "Logical replication payload; distinct from the frontend/backend message envelope", "/versions/15/facts/1/label": "First field", "/versions/15/tables/0/title": "Fields in documented order", "/versions/15/related/0/label": "Streaming replication protocol", "/versions/15/related/1/label": "Logical Decoding Plugins", "/versions/15/sections/0/title": "Protocol context", "/versions/15/tables/0/rows/0/c2": "Identifies the message as a stream prepared transaction message.", "/versions/15/tables/0/rows/1/c2": "Flags; currently unused.", "/versions/15/tables/0/rows/2/c2": "The LSN of the prepare.", "/versions/15/tables/0/rows/3/c2": "The end LSN of the prepared transaction.", "/versions/15/tables/0/rows/4/c2": "Prepare timestamp of the transaction. The value is in number of microseconds since PostgreSQL epoch (2000-01-01).", "/versions/15/tables/0/rows/5/c2": "Xid of the transaction.", "/versions/15/tables/0/rows/6/c1": "String", "/versions/15/tables/0/rows/6/c2": "The user defined GID of the prepared transaction.", "/versions/15/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 55.4 , 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. The following message parts are shared by the above messages.", "/versions/15/tables/0/columns/0/label": "Position", "/versions/15/tables/0/columns/1/label": "Format", "/versions/15/tables/0/columns/2/label": "Meaning"}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "a2cb781c40a33f761792ec2653f95aa4604da34c1fa343470872525e66549a10"}, "comparison_data": {"layer": "logical replication", "fields": [{"format": "Byte1('p')", "description": "Identifies the message as a stream prepared transaction message."}, {"format": "Int8(0)", "description": "Flags; currently unused."}, {"format": "Int64 (XLogRecPtr)", "description": "The LSN of the prepare."}, {"format": "Int64 (XLogRecPtr)", "description": "The end LSN of the prepared transaction."}, {"format": "Int64 (TimestampTz)", "description": "Prepare timestamp of the transaction. The value is in number of microseconds since PostgreSQL epoch (2000-01-01)."}, {"format": "Int32 (TransactionId)", "description": "Xid of the transaction."}, {"format": "String", "description": "The user defined GID of the prepared transaction."}]}, "comparison_hash": "465c922a6200dc4867b30cdb9d75453ddb89b57b11cfc63ab0bcda9cfbe78d57", "manual_language": "zh"}, "16": {"facts": [{"label": "\u5c42\u6b21", "value": "\u903b\u8f91\u590d\u5236\u8f7d\u8377\uff0c\u4e0e\u524d\u540e\u7aef\u6d88\u606f\u5c01\u88c5\u5206\u5f00\u3002"}, {"label": "\u9996\u4e2a\u5b57\u6bb5", "value": "Byte1('p')"}], "fields": [{"format": "Byte1('p')", "description": "Identifies the message as a stream prepared transaction message."}, {"format": "Int8(0)", "description": "Flags; currently unused."}, {"format": "Int64 (XLogRecPtr)", "description": "The LSN of the prepare."}, {"format": "Int64 (XLogRecPtr)", "description": "The end LSN of the prepared transaction."}, {"format": "Int64 (TimestampTz)", "description": "Prepare timestamp of the transaction. The value is in number of microseconds since PostgreSQL epoch (2000-01-01)."}, {"format": "Int32 (TransactionId)", "description": "Xid of the transaction."}, {"format": "String", "description": "The user defined GID of the prepared transaction."}], "tables": [{"key": "fields", "rows": [{"c0": "1", "c1": "Byte1('p')", "c2": "\u5c06\u8be5\u6d88\u606f\u6807\u8bc6\u4e3a Stream Prepare \u6d88\u606f\u3002"}, {"c0": "2", "c1": "Int8(0)", "c2": "\u6807\u5fd7\uff1b\u76ee\u524d\u672a\u4f7f\u7528\u3002"}, {"c0": "3", "c1": "Int64 (XLogRecPtr)", "c2": "PREPARE \u7684 LSN\u3002"}, {"c0": "4", "c1": "Int64 (XLogRecPtr)", "c2": "\u9884\u5907\u4e8b\u52a1\u7684\u7ed3\u675f LSN\u3002"}, {"c0": "5", "c1": "Int64 (TimestampTz)", "c2": "\u4e8b\u52a1\u8fdb\u5165\u9884\u5907\u72b6\u6001\u7684\u65f6\u95f4\u6233\u3002\u5176\u503c\u4e3a\u81ea PostgreSQL \u7eaa\u5143\uff082000-01-01\uff09\u8d77\u7ecf\u8fc7\u7684\u5fae\u79d2\u6570\u3002"}, {"c0": "6", "c1": "Int32 (TransactionId)", "c2": "\u4e8b\u52a1\u7684 Xid\u3002"}, {"c0": "7", "c1": "\u5b57\u7b26\u4e32", "c2": "\u9884\u5907\u4e8b\u52a1\u7684\u7528\u6237\u5b9a\u4e49 GID\u3002"}], "title": "\u6309\u624b\u518c\u987a\u5e8f\u6392\u5217\u7684\u5b57\u6bb5", "columns": [{"key": "c0", "label": "\u4f4d\u7f6e"}, {"key": "c1", "label": "\u683c\u5f0f"}, {"key": "c2", "label": "\u542b\u4e49"}]}], "related": [{"url": "/docs/16/protocol-replication.html", "label": "\u6d41\u590d\u5236\u534f\u8bae"}, {"url": "/wiki/decode/?v=16", "label": "\u903b\u8f91\u89e3\u7801\u63d2\u4ef6"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v16.15/postgresql-16.15.tar.bz2", "label": "16.15", "major": "16", "channel": "stable", "revision": "c1575341fa7bd40f5274ea465b34390f4dc64cdd0770af327005caaeb9f6b7ed"}, "sources": [{"url": "https://pg.center/docs/16/protocol-logicalrep-message-formats.html#PROTOCOL-LOGICALREP-MESSAGE-FORMATS-STREAM-PREPARE", "path": "protocol-logicalrep-message-formats.html", "label": "PostgreSQL 16 English manual", "sha256": "23e3687e7c97c6a17a24684c30716fb7beed99c85967e828f4ee378effb5b50e", "language": "en", "original_url": "/docs/16/protocol-logicalrep-message-formats.html#PROTOCOL-LOGICALREP-MESSAGE-FORMATS-STREAM-PREPARE"}], "sections": [{"title": "\u534f\u8bae\u4e0a\u4e0b\u6587", "paragraphs": ["\u672c\u8282\u8bf4\u660e\u5404\u903b\u8f91\u590d\u5236\u6d88\u606f\u7684\u8be6\u7ec6\u683c\u5f0f\u3002\u8fd9\u4e9b\u6d88\u606f\u7531\u590d\u5236\u69fd SQL \u63a5\u53e3\u8fd4\u56de\uff0c\u6216\u7531 walsender \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 55.4 \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": "Stream Prepare", "description": ["\u903b\u8f91\u590d\u5236 Stream Prepare \u683c\u5f0f\uff0c\u8868\u793a\u6d41\u5f0f\u4e8b\u52a1\u9884\u5907\u6d88\u606f\u3002"], "manual_html": "<dl><dd>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\">Byte1('p')</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5c06\u8be5\u6d88\u606f\u6807\u8bc6\u4e3a Stream Prepare \u6d88\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int8(0)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6807\u5fd7\uff1b\u76ee\u524d\u672a\u4f7f\u7528\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int64 (XLogRecPtr)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>PREPARE \u7684 LSN\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int64 (XLogRecPtr)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u9884\u5907\u4e8b\u52a1\u7684\u7ed3\u675f LSN\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int64 (TimestampTz)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e8b\u52a1\u8fdb\u5165\u9884\u5907\u72b6\u6001\u7684\u65f6\u95f4\u6233\u3002\u5176\u503c\u4e3a\u81ea PostgreSQL \u7eaa\u5143\uff082000-01-01\uff09\u8d77\u7ecf\u8fc7\u7684\u5fae\u79d2\u6570\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int32 (TransactionId)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e8b\u52a1\u7684 Xid\u3002</p>\n</p>\n</dd>\n<dt lang=\"zh\">\u5b57\u7b26\u4e32</dt>\n<dd>\n<p lang=\"zh\">\n<p>\u9884\u5907\u4e8b\u52a1\u7684\u7528\u6237\u5b9a\u4e49 GID\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n</dd></dl>", "manual_path": "/docs/16/protocol-logicalrep-message-formats.html", "localization": {"status": "complete", "sources": [{"url": "/docs/16/datatype-json.html", "method": "same-major semantic node", "sha256": "4d3ca6065016169a03abc9b3a57654fda5765ebb94074fa4eb578485f6807205", "language": "zh", "matched_nodes": ["#DATATYPE-JSON/div[19]/pre[27]/em[4]/code[0]"]}, {"url": "/docs/16/protocol-logicalrep-message-formats.html", "method": "same-major semantic node", "sha256": "b98a7e935cf62dc4309fd748c65eb9da8632c9f58181232a5a6b3a3c28a295ec", "language": "zh", "matched_nodes": ["#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[2]/dl[0]/dd[1]/div[0]/dl[0]/dd[7]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[2]/dl[0]/dd[5]/div[0]/dl[0]/dd[3]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[1]/div[0]/dl[0]/dd[11]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[1]/div[0]/dl[0]/dd[3]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[1]/div[0]/dl[0]/dd[5]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[1]/div[0]/dl[0]/dd[7]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[9]/div[0]/dl[0]/dd[1]"]}], "language": "zh", "original_text": {"/versions/16/description/0": "Logical replication Stream Prepare format. Identifies the message as a stream prepared transaction message.", "/versions/16/facts/0/label": "Layer", "/versions/16/facts/0/value": "Logical replication payload; distinct from the frontend/backend message envelope", "/versions/16/facts/1/label": "First field", "/versions/16/tables/0/title": "Fields in documented order", "/versions/16/related/0/label": "Streaming replication protocol", "/versions/16/related/1/label": "Logical Decoding Plugins", "/versions/16/sections/0/title": "Protocol context", "/versions/16/tables/0/rows/0/c2": "Identifies the message as a stream prepared transaction message.", "/versions/16/tables/0/rows/1/c2": "Flags; currently unused.", "/versions/16/tables/0/rows/2/c2": "The LSN of the prepare.", "/versions/16/tables/0/rows/3/c2": "The end LSN of the prepared transaction.", "/versions/16/tables/0/rows/4/c2": "Prepare timestamp of the transaction. The value is in number of microseconds since PostgreSQL epoch (2000-01-01).", "/versions/16/tables/0/rows/5/c2": "Xid of the transaction.", "/versions/16/tables/0/rows/6/c1": "String", "/versions/16/tables/0/rows/6/c2": "The user defined GID of the prepared transaction.", "/versions/16/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 55.4 , 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. The following message parts are shared by the above messages.", "/versions/16/tables/0/columns/0/label": "Position", "/versions/16/tables/0/columns/1/label": "Format", "/versions/16/tables/0/columns/2/label": "Meaning"}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "ebcfcd89d6f2aeefd7770ec060cba5a046904e09735ae9e24f112485c99a986c"}, "comparison_data": {"layer": "logical replication", "fields": [{"format": "Byte1('p')", "description": "Identifies the message as a stream prepared transaction message."}, {"format": "Int8(0)", "description": "Flags; currently unused."}, {"format": "Int64 (XLogRecPtr)", "description": "The LSN of the prepare."}, {"format": "Int64 (XLogRecPtr)", "description": "The end LSN of the prepared transaction."}, {"format": "Int64 (TimestampTz)", "description": "Prepare timestamp of the transaction. The value is in number of microseconds since PostgreSQL epoch (2000-01-01)."}, {"format": "Int32 (TransactionId)", "description": "Xid of the transaction."}, {"format": "String", "description": "The user defined GID of the prepared transaction."}]}, "comparison_hash": "465c922a6200dc4867b30cdb9d75453ddb89b57b11cfc63ab0bcda9cfbe78d57", "manual_language": "zh"}, "17": {"facts": [{"label": "\u5c42\u6b21", "value": "\u903b\u8f91\u590d\u5236\u8f7d\u8377\uff0c\u4e0e\u524d\u540e\u7aef\u6d88\u606f\u5c01\u88c5\u5206\u5f00\u3002"}, {"label": "\u9996\u4e2a\u5b57\u6bb5", "value": "Byte1('p')"}], "fields": [{"format": "Byte1('p')", "description": "Identifies the message as a stream prepared transaction message."}, {"format": "Int8(0)", "description": "Flags; currently unused."}, {"format": "Int64 (XLogRecPtr)", "description": "The LSN of the prepare."}, {"format": "Int64 (XLogRecPtr)", "description": "The end LSN of the prepared transaction."}, {"format": "Int64 (TimestampTz)", "description": "Prepare timestamp of the transaction. The value is in number of microseconds since PostgreSQL epoch (2000-01-01)."}, {"format": "Int32 (TransactionId)", "description": "Xid of the transaction."}, {"format": "String", "description": "The user defined GID of the prepared transaction."}], "tables": [{"key": "fields", "rows": [{"c0": "1", "c1": "Byte1('p')", "c2": "\u5c06\u8be5\u6d88\u606f\u6807\u8bc6\u4e3a Stream Prepare \u6d88\u606f\u3002"}, {"c0": "2", "c1": "Int8(0)", "c2": "\u6807\u5fd7\uff1b\u76ee\u524d\u672a\u4f7f\u7528\u3002"}, {"c0": "3", "c1": "Int64 (XLogRecPtr)", "c2": "PREPARE \u7684 LSN\u3002"}, {"c0": "4", "c1": "Int64 (XLogRecPtr)", "c2": "\u9884\u5907\u4e8b\u52a1\u7684\u7ed3\u675f LSN\u3002"}, {"c0": "5", "c1": "Int64 (TimestampTz)", "c2": "\u4e8b\u52a1\u8fdb\u5165\u9884\u5907\u72b6\u6001\u7684\u65f6\u95f4\u6233\u3002\u5176\u503c\u4e3a\u81ea PostgreSQL \u7eaa\u5143\uff082000-01-01\uff09\u8d77\u7ecf\u8fc7\u7684\u5fae\u79d2\u6570\u3002"}, {"c0": "6", "c1": "Int32 (TransactionId)", "c2": "\u4e8b\u52a1\u7684 Xid\u3002"}, {"c0": "7", "c1": "\u5b57\u7b26\u4e32", "c2": "\u9884\u5907\u4e8b\u52a1\u7684\u7528\u6237\u5b9a\u4e49 GID\u3002"}], "title": "\u6309\u624b\u518c\u987a\u5e8f\u6392\u5217\u7684\u5b57\u6bb5", "columns": [{"key": "c0", "label": "\u4f4d\u7f6e"}, {"key": "c1", "label": "\u683c\u5f0f"}, {"key": "c2", "label": "\u542b\u4e49"}]}], "related": [{"url": "/docs/17/protocol-replication.html", "label": "\u6d41\u590d\u5236\u534f\u8bae"}, {"url": "/wiki/decode/?v=17", "label": "\u903b\u8f91\u89e3\u7801\u63d2\u4ef6"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v17.11/postgresql-17.11.tar.bz2", "label": "17.11", "major": "17", "channel": "stable", "revision": "dd27f2b3c59e73ed14aa3324901242bf69a032a6347805f274e6260322d42979"}, "sources": [{"url": "https://pg.center/docs/17/protocol-logicalrep-message-formats.html#PROTOCOL-LOGICALREP-MESSAGE-FORMATS-STREAM-PREPARE", "path": "protocol-logicalrep-message-formats.html", "label": "PostgreSQL 17 English manual", "sha256": "438b6a09f48bd0e9d2424559a0ab950dce44a9ab6573d362362c1c8d0b375fe3", "language": "en", "original_url": "/docs/17/protocol-logicalrep-message-formats.html#PROTOCOL-LOGICALREP-MESSAGE-FORMATS-STREAM-PREPARE"}], "sections": [{"title": "\u534f\u8bae\u4e0a\u4e0b\u6587", "paragraphs": ["\u672c\u8282\u8bf4\u660e\u5404\u903b\u8f91\u590d\u5236\u6d88\u606f\u7684\u8be6\u7ec6\u683c\u5f0f\u3002\u8fd9\u4e9b\u6d88\u606f\u7531\u590d\u5236\u69fd SQL \u63a5\u53e3\u8fd4\u56de\uff0c\u6216\u7531 walsender \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 53.4 \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": "Stream Prepare", "description": ["\u903b\u8f91\u590d\u5236 Stream Prepare \u683c\u5f0f\uff0c\u8868\u793a\u6d41\u5f0f\u4e8b\u52a1\u9884\u5907\u6d88\u606f\u3002"], "manual_html": "<dl><dd>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\">Byte1('p')</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5c06\u8be5\u6d88\u606f\u6807\u8bc6\u4e3a Stream Prepare \u6d88\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int8(0)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6807\u5fd7\uff1b\u76ee\u524d\u672a\u4f7f\u7528\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int64 (XLogRecPtr)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>PREPARE \u7684 LSN\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int64 (XLogRecPtr)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u9884\u5907\u4e8b\u52a1\u7684\u7ed3\u675f LSN\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int64 (TimestampTz)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e8b\u52a1\u8fdb\u5165\u9884\u5907\u72b6\u6001\u7684\u65f6\u95f4\u6233\u3002\u5176\u503c\u4e3a\u81ea PostgreSQL \u7eaa\u5143\uff082000-01-01\uff09\u8d77\u7ecf\u8fc7\u7684\u5fae\u79d2\u6570\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int32 (TransactionId)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e8b\u52a1\u7684 Xid\u3002</p>\n</p>\n</dd>\n<dt lang=\"zh\">\u5b57\u7b26\u4e32</dt>\n<dd>\n<p lang=\"zh\">\n<p>\u9884\u5907\u4e8b\u52a1\u7684\u7528\u6237\u5b9a\u4e49 GID\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n</dd></dl>", "manual_path": "/docs/17/protocol-logicalrep-message-formats.html", "localization": {"status": "complete", "sources": [{"url": "/docs/17/datatype-json.html", "method": "same-major semantic node", "sha256": "8d2627b39aa9ad8449221de824f0c89af32197e8db7972fbc03b43dfcd0e9a93", "language": "zh", "matched_nodes": ["#DATATYPE-JSON/div[19]/pre[27]/em[4]/code[0]"]}, {"url": "/docs/17/protocol-logicalrep-message-formats.html", "method": "same-major semantic node", "sha256": "79ce4e8bc85b402bb07edbfbe82b47cfd1d5e41a301bfbd1da8bac9c8526036c", "language": "zh", "matched_nodes": ["#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[2]/dl[0]/dd[1]/div[0]/dl[0]/dd[7]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[2]/dl[0]/dd[5]/div[0]/dl[0]/dd[3]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[1]/div[0]/dl[0]/dd[11]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[1]/div[0]/dl[0]/dd[3]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[1]/div[0]/dl[0]/dd[5]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[1]/div[0]/dl[0]/dd[7]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[9]/div[0]/dl[0]/dd[1]"]}], "language": "zh", "original_text": {"/versions/17/description/0": "Logical replication Stream Prepare format. Identifies the message as a stream prepared transaction message.", "/versions/17/facts/0/label": "Layer", "/versions/17/facts/0/value": "Logical replication payload; distinct from the frontend/backend message envelope", "/versions/17/facts/1/label": "First field", "/versions/17/tables/0/title": "Fields in documented order", "/versions/17/related/0/label": "Streaming replication protocol", "/versions/17/related/1/label": "Logical Decoding Plugins", "/versions/17/sections/0/title": "Protocol context", "/versions/17/tables/0/rows/0/c2": "Identifies the message as a stream prepared transaction message.", "/versions/17/tables/0/rows/1/c2": "Flags; currently unused.", "/versions/17/tables/0/rows/2/c2": "The LSN of the prepare.", "/versions/17/tables/0/rows/3/c2": "The end LSN of the prepared transaction.", "/versions/17/tables/0/rows/4/c2": "Prepare timestamp of the transaction. The value is in number of microseconds since PostgreSQL epoch (2000-01-01).", "/versions/17/tables/0/rows/5/c2": "Xid of the transaction.", "/versions/17/tables/0/rows/6/c1": "String", "/versions/17/tables/0/rows/6/c2": "The user defined GID of the prepared transaction.", "/versions/17/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 53.4 , 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. The following message parts are shared by the above messages.", "/versions/17/tables/0/columns/0/label": "Position", "/versions/17/tables/0/columns/1/label": "Format", "/versions/17/tables/0/columns/2/label": "Meaning"}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "16e74a15317142e311d4a6f7436c889907428dc80b3e7cb60088f69916e8245f"}, "comparison_data": {"layer": "logical replication", "fields": [{"format": "Byte1('p')", "description": "Identifies the message as a stream prepared transaction message."}, {"format": "Int8(0)", "description": "Flags; currently unused."}, {"format": "Int64 (XLogRecPtr)", "description": "The LSN of the prepare."}, {"format": "Int64 (XLogRecPtr)", "description": "The end LSN of the prepared transaction."}, {"format": "Int64 (TimestampTz)", "description": "Prepare timestamp of the transaction. The value is in number of microseconds since PostgreSQL epoch (2000-01-01)."}, {"format": "Int32 (TransactionId)", "description": "Xid of the transaction."}, {"format": "String", "description": "The user defined GID of the prepared transaction."}]}, "comparison_hash": "465c922a6200dc4867b30cdb9d75453ddb89b57b11cfc63ab0bcda9cfbe78d57", "manual_language": "zh"}, "18": {"facts": [{"label": "\u5c42\u6b21", "value": "\u903b\u8f91\u590d\u5236\u8f7d\u8377\uff0c\u4e0e\u524d\u540e\u7aef\u6d88\u606f\u5c01\u88c5\u5206\u5f00\u3002"}, {"label": "\u9996\u4e2a\u5b57\u6bb5", "value": "Byte1('p')"}], "fields": [{"format": "Byte1('p')", "description": "Identifies the message as a stream prepared transaction message."}, {"format": "Int8(0)", "description": "Flags; currently unused."}, {"format": "Int64 (XLogRecPtr)", "description": "The LSN of the prepare."}, {"format": "Int64 (XLogRecPtr)", "description": "The end LSN of the prepared transaction."}, {"format": "Int64 (TimestampTz)", "description": "Prepare timestamp of the transaction. The value is in number of microseconds since PostgreSQL epoch (2000-01-01)."}, {"format": "Int32 (TransactionId)", "description": "Xid of the transaction."}, {"format": "String", "description": "The user defined GID of the prepared transaction."}], "tables": [{"key": "fields", "rows": [{"c0": "1", "c1": "Byte1('p')", "c2": "\u5c06\u8be5\u6d88\u606f\u6807\u8bc6\u4e3a Stream Prepare \u6d88\u606f\u3002"}, {"c0": "2", "c1": "Int8(0)", "c2": "\u6807\u5fd7\uff1b\u76ee\u524d\u672a\u4f7f\u7528\u3002"}, {"c0": "3", "c1": "Int64 (XLogRecPtr)", "c2": "PREPARE \u7684 LSN\u3002"}, {"c0": "4", "c1": "Int64 (XLogRecPtr)", "c2": "\u9884\u5907\u4e8b\u52a1\u7684\u7ed3\u675f LSN\u3002"}, {"c0": "5", "c1": "Int64 (TimestampTz)", "c2": "\u4e8b\u52a1\u8fdb\u5165\u9884\u5907\u72b6\u6001\u7684\u65f6\u95f4\u6233\u3002\u5176\u503c\u4e3a\u81ea PostgreSQL \u7eaa\u5143\uff082000-01-01\uff09\u8d77\u7ecf\u8fc7\u7684\u5fae\u79d2\u6570\u3002"}, {"c0": "6", "c1": "Int32 (TransactionId)", "c2": "\u4e8b\u52a1\u7684 Xid\u3002"}, {"c0": "7", "c1": "\u5b57\u7b26\u4e32", "c2": "\u9884\u5907\u4e8b\u52a1\u7684\u7528\u6237\u5b9a\u4e49 GID\u3002"}], "title": "\u6309\u624b\u518c\u987a\u5e8f\u6392\u5217\u7684\u5b57\u6bb5", "columns": [{"key": "c0", "label": "\u4f4d\u7f6e"}, {"key": "c1", "label": "\u683c\u5f0f"}, {"key": "c2", "label": "\u542b\u4e49"}]}], "related": [{"url": "/docs/18/protocol-replication.html", "label": "\u6d41\u590d\u5236\u534f\u8bae"}, {"url": "/wiki/decode/?v=18", "label": "\u903b\u8f91\u89e3\u7801\u63d2\u4ef6"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2", "label": "18.6", "major": "18", "channel": "stable", "revision": "555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"}, "sources": [{"url": "https://pg.center/docs/18/protocol-logicalrep-message-formats.html#PROTOCOL-LOGICALREP-MESSAGE-FORMATS-STREAM-PREPARE", "path": "protocol-logicalrep-message-formats.html", "label": "PostgreSQL 18 English manual", "sha256": "e976b008206820fbeb1eba226e69bb7c00af157372c3545375d1b5053c76d0ad", "language": "en", "original_url": "/docs/18/protocol-logicalrep-message-formats.html#PROTOCOL-LOGICALREP-MESSAGE-FORMATS-STREAM-PREPARE"}], "sections": [{"title": "\u534f\u8bae\u4e0a\u4e0b\u6587", "paragraphs": ["\u672c\u8282\u8bf4\u660e\u5404\u903b\u8f91\u590d\u5236\u6d88\u606f\u7684\u8be6\u7ec6\u683c\u5f0f\u3002\u8fd9\u4e9b\u6d88\u606f\u7531\u590d\u5236\u69fd SQL \u63a5\u53e3\u8fd4\u56de\uff0c\u6216\u7531 walsender \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": "Stream Prepare", "description": ["\u903b\u8f91\u590d\u5236 Stream Prepare \u683c\u5f0f\uff0c\u8868\u793a\u6d41\u5f0f\u4e8b\u52a1\u9884\u5907\u6d88\u606f\u3002"], "manual_html": "<dl><dd>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\">Byte1('p')</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5c06\u8be5\u6d88\u606f\u6807\u8bc6\u4e3a Stream Prepare \u6d88\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int8(0)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6807\u5fd7\uff1b\u76ee\u524d\u672a\u4f7f\u7528\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int64 (XLogRecPtr)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>PREPARE \u7684 LSN\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int64 (XLogRecPtr)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u9884\u5907\u4e8b\u52a1\u7684\u7ed3\u675f LSN\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int64 (TimestampTz)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e8b\u52a1\u8fdb\u5165\u9884\u5907\u72b6\u6001\u7684\u65f6\u95f4\u6233\u3002\u5176\u503c\u4e3a\u81ea PostgreSQL \u7eaa\u5143\uff082000-01-01\uff09\u8d77\u7ecf\u8fc7\u7684\u5fae\u79d2\u6570\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int32 (TransactionId)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e8b\u52a1\u7684 Xid\u3002</p>\n</p>\n</dd>\n<dt lang=\"zh\">\u5b57\u7b26\u4e32</dt>\n<dd>\n<p lang=\"zh\">\n<p>\u9884\u5907\u4e8b\u52a1\u7684\u7528\u6237\u5b9a\u4e49 GID\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n</dd></dl>", "manual_path": "/docs/18/protocol-logicalrep-message-formats.html", "localization": {"status": "complete", "sources": [{"url": "/docs/18/datatype-json.html", "method": "same-major semantic node", "sha256": "b9e8f98a0b5f2a4ec7b5197d02ab40c0ac0635a678c32728aaadd43cb4cd3766", "language": "zh", "matched_nodes": ["#DATATYPE-JSON/div[19]/pre[27]/em[4]/code[0]"]}, {"url": "/docs/18/protocol-logicalrep-message-formats.html", "method": "same-major semantic node", "sha256": "61e6f991cfe7587d83d1c5e849d29aaaa85476953480ace0ec4dd00cbb25556b", "language": "zh", "matched_nodes": ["#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[2]/dl[0]/dd[1]/div[0]/dl[0]/dd[7]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[2]/dl[0]/dd[5]/div[0]/dl[0]/dd[3]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[1]/div[0]/dl[0]/dd[11]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[1]/div[0]/dl[0]/dd[3]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[1]/div[0]/dl[0]/dd[5]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[1]/div[0]/dl[0]/dd[7]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[9]/div[0]/dl[0]/dd[1]"]}], "language": "zh", "original_text": {"/versions/18/description/0": "Logical replication Stream Prepare format. Identifies the message as a stream prepared transaction 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 a stream prepared transaction message.", "/versions/18/tables/0/rows/1/c2": "Flags; currently unused.", "/versions/18/tables/0/rows/2/c2": "The LSN of the prepare.", "/versions/18/tables/0/rows/3/c2": "The end LSN of the prepared transaction.", "/versions/18/tables/0/rows/4/c2": "Prepare timestamp of the transaction. The value is in number of microseconds since PostgreSQL epoch (2000-01-01).", "/versions/18/tables/0/rows/5/c2": "Xid of the transaction.", "/versions/18/tables/0/rows/6/c1": "String", "/versions/18/tables/0/rows/6/c2": "The user defined GID of the prepared transaction.", "/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. The following message parts are shared by the above messages.", "/versions/18/tables/0/columns/0/label": "Position", "/versions/18/tables/0/columns/1/label": "Format", "/versions/18/tables/0/columns/2/label": "Meaning"}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "5129a4b8331fd517a342991a532f2f264fcf1682feba5a36401047c0ab09b4c7"}, "comparison_data": {"layer": "logical replication", "fields": [{"format": "Byte1('p')", "description": "Identifies the message as a stream prepared transaction message."}, {"format": "Int8(0)", "description": "Flags; currently unused."}, {"format": "Int64 (XLogRecPtr)", "description": "The LSN of the prepare."}, {"format": "Int64 (XLogRecPtr)", "description": "The end LSN of the prepared transaction."}, {"format": "Int64 (TimestampTz)", "description": "Prepare timestamp of the transaction. The value is in number of microseconds since PostgreSQL epoch (2000-01-01)."}, {"format": "Int32 (TransactionId)", "description": "Xid of the transaction."}, {"format": "String", "description": "The user defined GID of the prepared transaction."}]}, "comparison_hash": "465c922a6200dc4867b30cdb9d75453ddb89b57b11cfc63ab0bcda9cfbe78d57", "manual_language": "zh"}, "19": {"facts": [{"label": "\u5c42\u6b21", "value": "\u903b\u8f91\u590d\u5236\u8f7d\u8377\uff0c\u4e0e\u524d\u540e\u7aef\u6d88\u606f\u5c01\u88c5\u5206\u5f00\u3002"}, {"label": "\u9996\u4e2a\u5b57\u6bb5", "value": "Byte1('p')"}], "fields": [{"format": "Byte1('p')", "description": "Identifies the message as a stream prepared transaction message."}, {"format": "Int8(0)", "description": "Flags; currently unused."}, {"format": "Int64 (XLogRecPtr)", "description": "The LSN of the prepare."}, {"format": "Int64 (XLogRecPtr)", "description": "The end LSN of the prepared transaction."}, {"format": "Int64 (TimestampTz)", "description": "Prepare timestamp of the transaction. The value is in number of microseconds since PostgreSQL epoch (2000-01-01)."}, {"format": "Int32 (TransactionId)", "description": "Xid of the transaction."}, {"format": "String", "description": "The user defined GID of the prepared transaction."}], "tables": [{"key": "fields", "rows": [{"c0": "1", "c1": "Byte1('p')", "c2": "\u5c06\u8be5\u6d88\u606f\u6807\u8bc6\u4e3a Stream Prepare \u6d88\u606f\u3002"}, {"c0": "2", "c1": "Int8(0)", "c2": "\u6807\u5fd7\uff1b\u76ee\u524d\u672a\u4f7f\u7528\u3002"}, {"c0": "3", "c1": "Int64 (XLogRecPtr)", "c2": "PREPARE \u7684 LSN\u3002"}, {"c0": "4", "c1": "Int64 (XLogRecPtr)", "c2": "\u9884\u5907\u4e8b\u52a1\u7684\u7ed3\u675f LSN\u3002"}, {"c0": "5", "c1": "Int64 (TimestampTz)", "c2": "\u4e8b\u52a1\u8fdb\u5165\u9884\u5907\u72b6\u6001\u7684\u65f6\u95f4\u6233\u3002\u5176\u503c\u4e3a\u81ea PostgreSQL \u7eaa\u5143\uff082000-01-01\uff09\u8d77\u7ecf\u8fc7\u7684\u5fae\u79d2\u6570\u3002"}, {"c0": "6", "c1": "Int32 (TransactionId)", "c2": "\u4e8b\u52a1\u7684 Xid\u3002"}, {"c0": "7", "c1": "\u5b57\u7b26\u4e32", "c2": "\u9884\u5907\u4e8b\u52a1\u7684\u7528\u6237\u5b9a\u4e49 GID\u3002"}], "title": "\u6309\u624b\u518c\u987a\u5e8f\u6392\u5217\u7684\u5b57\u6bb5", "columns": [{"key": "c0", "label": "\u4f4d\u7f6e"}, {"key": "c1", "label": "\u683c\u5f0f"}, {"key": "c2", "label": "\u542b\u4e49"}]}], "related": [{"url": "/docs/19/protocol-replication.html", "label": "\u6d41\u590d\u5236\u534f\u8bae"}, {"url": "/wiki/decode/?v=19", "label": "\u903b\u8f91\u89e3\u7801\u63d2\u4ef6"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v19beta4/postgresql-19beta4.tar.bz2", "label": "19beta4", "major": "19", "channel": "preview", "revision": "83157ee9c599d03b2f7a3d73ef3a56ec24e0e79cc2b3501a64d1364f56398c86"}, "sources": [{"url": "https://pg.center/docs/19/protocol-logicalrep-message-formats.html#PROTOCOL-LOGICALREP-MESSAGE-FORMATS-STREAM-PREPARE", "path": "protocol-logicalrep-message-formats.html", "label": "PostgreSQL 19 English manual", "sha256": "e09479de1e9cef5a4abc9703d423b68677f7f7e0e44c1098a2d37144980fd461", "language": "en", "original_url": "/docs/19/protocol-logicalrep-message-formats.html#PROTOCOL-LOGICALREP-MESSAGE-FORMATS-STREAM-PREPARE"}], "sections": [{"title": "\u534f\u8bae\u4e0a\u4e0b\u6587", "paragraphs": ["\u672c\u8282\u8bf4\u660e\u5404\u903b\u8f91\u590d\u5236\u6d88\u606f\u7684\u8be6\u7ec6\u683c\u5f0f\u3002\u8fd9\u4e9b\u6d88\u606f\u7531\u590d\u5236\u69fd SQL \u63a5\u53e3\u8fd4\u56de\uff0c\u6216\u7531 walsender \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": "Stream Prepare", "description": ["\u903b\u8f91\u590d\u5236 Stream Prepare \u683c\u5f0f\uff0c\u8868\u793a\u6d41\u5f0f\u4e8b\u52a1\u9884\u5907\u6d88\u606f\u3002"], "manual_html": "<dl><dd>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\">Byte1('p')</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5c06\u8be5\u6d88\u606f\u6807\u8bc6\u4e3a Stream Prepare \u6d88\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int8(0)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6807\u5fd7\uff1b\u76ee\u524d\u672a\u4f7f\u7528\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int64 (XLogRecPtr)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>PREPARE \u7684 LSN\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int64 (XLogRecPtr)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u9884\u5907\u4e8b\u52a1\u7684\u7ed3\u675f LSN\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int64 (TimestampTz)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e8b\u52a1\u8fdb\u5165\u9884\u5907\u72b6\u6001\u7684\u65f6\u95f4\u6233\u3002\u5176\u503c\u4e3a\u81ea PostgreSQL \u7eaa\u5143\uff082000-01-01\uff09\u8d77\u7ecf\u8fc7\u7684\u5fae\u79d2\u6570\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int32 (TransactionId)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e8b\u52a1\u7684 Xid\u3002</p>\n</p>\n</dd>\n<dt lang=\"zh\">\u5b57\u7b26\u4e32</dt>\n<dd>\n<p lang=\"zh\">\n<p>\u9884\u5907\u4e8b\u52a1\u7684\u7528\u6237\u5b9a\u4e49 GID\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n</dd></dl>", "manual_path": "/docs/19/protocol-logicalrep-message-formats.html", "localization": {"status": "complete", "sources": [{"url": "/docs/19/datatype-json.html", "method": "same-major semantic node", "sha256": "3e9557f5a65838e08890f25b0cc62147ef278263efb1c2462b7906308771ae60", "language": "zh", "matched_nodes": ["#DATATYPE-JSON/div[19]/pre[27]/em[4]/code[0]"]}, {"url": "/docs/19/protocol-logicalrep-message-formats.html", "method": "same-major semantic node", "sha256": "c07f8475fc626b1d9e9141b2d19f52d957197eac703966f99dd4b4da2556ac35", "language": "zh", "matched_nodes": ["#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[2]/dl[0]/dd[1]/div[0]/dl[0]/dd[7]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[2]/dl[0]/dd[5]/div[0]/dl[0]/dd[3]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[1]/div[0]/dl[0]/dd[11]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[1]/div[0]/dl[0]/dd[3]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[1]/div[0]/dl[0]/dd[5]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[1]/div[0]/dl[0]/dd[7]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[9]/div[0]/dl[0]/dd[1]"]}], "language": "zh", "original_text": {"/versions/19/description/0": "Logical replication Stream Prepare format. Identifies the message as a stream prepared transaction message.", "/versions/19/facts/0/label": "Layer", "/versions/19/facts/0/value": "Logical replication payload; distinct from the frontend/backend message envelope", "/versions/19/facts/1/label": "First field", "/versions/19/tables/0/title": "Fields in documented order", "/versions/19/related/0/label": "Streaming replication protocol", "/versions/19/related/1/label": "Logical Decoding Plugins", "/versions/19/sections/0/title": "Protocol context", "/versions/19/tables/0/rows/0/c2": "Identifies the message as a stream prepared transaction message.", "/versions/19/tables/0/rows/1/c2": "Flags; currently unused.", "/versions/19/tables/0/rows/2/c2": "The LSN of the prepare.", "/versions/19/tables/0/rows/3/c2": "The end LSN of the prepared transaction.", "/versions/19/tables/0/rows/4/c2": "Prepare timestamp of the transaction. The value is in number of microseconds since PostgreSQL epoch (2000-01-01).", "/versions/19/tables/0/rows/5/c2": "Xid of the transaction.", "/versions/19/tables/0/rows/6/c1": "String", "/versions/19/tables/0/rows/6/c2": "The user defined GID of the prepared transaction.", "/versions/19/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. The following message parts are shared by the above messages.", "/versions/19/tables/0/columns/0/label": "Position", "/versions/19/tables/0/columns/1/label": "Format", "/versions/19/tables/0/columns/2/label": "Meaning"}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "f339328bf427c0f4addff400195011991ab566069a70a6951a2228b5aa4f163e"}, "comparison_data": {"layer": "logical replication", "fields": [{"format": "Byte1('p')", "description": "Identifies the message as a stream prepared transaction message."}, {"format": "Int8(0)", "description": "Flags; currently unused."}, {"format": "Int64 (XLogRecPtr)", "description": "The LSN of the prepare."}, {"format": "Int64 (XLogRecPtr)", "description": "The end LSN of the prepared transaction."}, {"format": "Int64 (TimestampTz)", "description": "Prepare timestamp of the transaction. The value is in number of microseconds since PostgreSQL epoch (2000-01-01)."}, {"format": "Int32 (TransactionId)", "description": "Xid of the transaction."}, {"format": "String", "description": "The user defined GID of the prepared transaction."}]}, "comparison_hash": "465c922a6200dc4867b30cdb9d75453ddb89b57b11cfc63ab0bcda9cfbe78d57", "manual_language": "zh"}, "20": {"facts": [{"label": "\u5c42\u6b21", "value": "\u903b\u8f91\u590d\u5236\u8f7d\u8377\uff0c\u4e0e\u524d\u540e\u7aef\u6d88\u606f\u5c01\u88c5\u5206\u5f00\u3002"}, {"label": "\u9996\u4e2a\u5b57\u6bb5", "value": "Byte1('p')"}], "fields": [{"format": "Byte1('p')", "description": "Identifies the message as a stream prepared transaction message."}, {"format": "Int8(0)", "description": "Flags; currently unused."}, {"format": "Int64 (XLogRecPtr)", "description": "The LSN of the prepare."}, {"format": "Int64 (XLogRecPtr)", "description": "The end LSN of the prepared transaction."}, {"format": "Int64 (TimestampTz)", "description": "Prepare timestamp of the transaction. The value is in number of microseconds since PostgreSQL epoch (2000-01-01)."}, {"format": "Int32 (TransactionId)", "description": "Xid of the transaction."}, {"format": "String", "description": "The user defined GID of the prepared transaction."}], "tables": [{"key": "fields", "rows": [{"c0": "1", "c1": "Byte1('p')", "c2": "\u5c06\u8be5\u6d88\u606f\u6807\u8bc6\u4e3a Stream Prepare \u6d88\u606f\u3002"}, {"c0": "2", "c1": "Int8(0)", "c2": "\u6807\u5fd7\uff1b\u76ee\u524d\u672a\u4f7f\u7528\u3002"}, {"c0": "3", "c1": "Int64 (XLogRecPtr)", "c2": "\u9884\u5907\u64cd\u4f5c\u7684 LSN\u3002"}, {"c0": "4", "c1": "Int64 (XLogRecPtr)", "c2": "\u9884\u5907\u4e8b\u52a1\u7684\u7ed3\u675f LSN\u3002"}, {"c0": "5", "c1": "Int64 (TimestampTz)", "c2": "\u4e8b\u52a1\u8fdb\u5165\u9884\u5907\u72b6\u6001\u7684\u65f6\u95f4\u6233\u3002\u5176\u503c\u4e3a\u81ea PostgreSQL \u7eaa\u5143\uff082000-01-01\uff09\u8d77\u7ecf\u8fc7\u7684\u5fae\u79d2\u6570\u3002"}, {"c0": "6", "c1": "Int32 (TransactionId)", "c2": "\u4e8b\u52a1\u7684 Xid\u3002"}, {"c0": "7", "c1": "\u5b57\u7b26\u4e32", "c2": "\u9884\u5907\u4e8b\u52a1\u7684\u7528\u6237\u5b9a\u4e49 GID\u3002"}], "title": "\u6309\u624b\u518c\u987a\u5e8f\u6392\u5217\u7684\u5b57\u6bb5", "columns": [{"key": "c0", "label": "\u4f4d\u7f6e"}, {"key": "c1", "label": "\u683c\u5f0f"}, {"key": "c2", "label": "\u542b\u4e49"}]}], "related": [{"url": "/docs/devel/protocol-replication.html", "label": "\u6d41\u590d\u5236\u534f\u8bae"}, {"url": "/wiki/decode/?v=20", "label": "\u903b\u8f91\u89e3\u7801\u63d2\u4ef6"}], "release": {"ref": "https://ftp.postgresql.org/pub/snapshot/dev/postgresql-snapshot.tar.bz2", "label": "20devel", "major": "20", "channel": "devel", "revision": "4d3346909b201ac1648232cf290462a7070c119326f56196f1f0253ed80fae41"}, "sources": [{"url": "https://pg.center/docs/devel/protocol-logicalrep-message-formats.html#PROTOCOL-LOGICALREP-MESSAGE-FORMATS-STREAM-PREPARE", "path": "protocol-logicalrep-message-formats.html", "label": "PostgreSQL 20 English manual", "sha256": "1c5d9d7ff344de5d066562bb12e9db460a51b7713932ca201856714fa9477238", "language": "en", "original_url": "/docs/devel/protocol-logicalrep-message-formats.html#PROTOCOL-LOGICALREP-MESSAGE-FORMATS-STREAM-PREPARE"}], "sections": [{"title": "\u534f\u8bae\u4e0a\u4e0b\u6587", "paragraphs": ["\u672c\u8282\u8bf4\u660e\u5404\u903b\u8f91\u590d\u5236\u6d88\u606f\u7684\u8be6\u7ec6\u683c\u5f0f\u3002\u8fd9\u4e9b\u6d88\u606f\u7531\u590d\u5236\u69fd SQL \u63a5\u53e3\u8fd4\u56de\uff0c\u6216\u7531 walsender \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": "Stream Prepare", "description": ["\u903b\u8f91\u590d\u5236 Stream Prepare \u683c\u5f0f\uff0c\u8868\u793a\u6d41\u5f0f\u4e8b\u52a1\u9884\u5907\u6d88\u606f\u3002"], "manual_html": "<dl><dd>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\">Byte1('p')</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5c06\u8be5\u6d88\u606f\u6807\u8bc6\u4e3a Stream Prepare \u6d88\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int8(0)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6807\u5fd7\uff1b\u76ee\u524d\u672a\u4f7f\u7528\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int64 (XLogRecPtr)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u9884\u5907\u64cd\u4f5c\u7684 LSN\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int64 (XLogRecPtr)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u9884\u5907\u4e8b\u52a1\u7684\u7ed3\u675f LSN\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int64 (TimestampTz)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e8b\u52a1\u8fdb\u5165\u9884\u5907\u72b6\u6001\u7684\u65f6\u95f4\u6233\u3002\u5176\u503c\u4e3a\u81ea PostgreSQL \u7eaa\u5143\uff082000-01-01\uff09\u8d77\u7ecf\u8fc7\u7684\u5fae\u79d2\u6570\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int32 (TransactionId)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e8b\u52a1\u7684 Xid\u3002</p>\n</p>\n</dd>\n<dt lang=\"zh\">\u5b57\u7b26\u4e32</dt>\n<dd>\n<p lang=\"zh\">\n<p>\u9884\u5907\u4e8b\u52a1\u7684\u7528\u6237\u5b9a\u4e49 GID\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n</dd></dl>", "manual_path": "/docs/devel/protocol-logicalrep-message-formats.html", "localization": {"status": "complete", "sources": [{"url": "/docs/devel/datatype-json.html", "method": "same-major semantic node", "sha256": "0bfc34c3ea3eb808f83865871c3fdad1265f64037c9a9aab3fecc96f1d1632d1", "language": "zh", "matched_nodes": ["#DATATYPE-JSON/div[19]/pre[27]/em[4]/code[0]"]}, {"url": "/docs/devel/protocol-logicalrep-message-formats.html", "method": "same-major semantic node", "sha256": "0368c68a321a90f36ca5e51d25a0d378d562e7078aa5b6f40dbf868f40387542", "language": "zh", "matched_nodes": ["#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[2]/dl[0]/dd[1]/div[0]/dl[0]/dd[7]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[2]/dl[0]/dd[5]/div[0]/dl[0]/dd[3]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[1]/div[0]/dl[0]/dd[11]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[1]/div[0]/dl[0]/dd[3]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[1]/div[0]/dl[0]/dd[5]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[1]/div[0]/dl[0]/dd[7]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[9]/div[0]/dl[0]/dd[1]"]}], "language": "zh", "original_text": {"/summary": "Logical replication Stream Prepare format. Identifies the message as a stream prepared transaction message.", "/category": "Logical replication formats", "/versions/20/description/0": "Logical replication Stream Prepare format. Identifies the message as a stream prepared transaction message.", "/versions/20/facts/0/label": "Layer", "/versions/20/facts/0/value": "Logical replication payload; distinct from the frontend/backend message envelope", "/versions/20/facts/1/label": "First field", "/versions/20/tables/0/title": "Fields in documented order", "/versions/20/related/0/label": "Streaming replication protocol", "/versions/20/related/1/label": "Logical Decoding Plugins", "/versions/20/sections/0/title": "Protocol context", "/versions/20/tables/0/rows/0/c2": "Identifies the message as a stream prepared transaction message.", "/versions/20/tables/0/rows/1/c2": "Flags; currently unused.", "/versions/20/tables/0/rows/2/c2": "The LSN of the prepare.", "/versions/20/tables/0/rows/3/c2": "The end LSN of the prepared transaction.", "/versions/20/tables/0/rows/4/c2": "Prepare timestamp of the transaction. The value is in number of microseconds since PostgreSQL epoch (2000-01-01).", "/versions/20/tables/0/rows/5/c2": "Xid of the transaction.", "/versions/20/tables/0/rows/6/c1": "String", "/versions/20/tables/0/rows/6/c2": "The user defined GID of the prepared transaction.", "/versions/20/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. The following message parts are shared by the above messages.", "/versions/20/tables/0/columns/0/label": "Position", "/versions/20/tables/0/columns/1/label": "Format", "/versions/20/tables/0/columns/2/label": "Meaning"}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "9651ded036ef821d037131775d223f372843b712de435e8937a687320a301451"}, "comparison_data": {"layer": "logical replication", "fields": [{"format": "Byte1('p')", "description": "Identifies the message as a stream prepared transaction message."}, {"format": "Int8(0)", "description": "Flags; currently unused."}, {"format": "Int64 (XLogRecPtr)", "description": "The LSN of the prepare."}, {"format": "Int64 (XLogRecPtr)", "description": "The end LSN of the prepared transaction."}, {"format": "Int64 (TimestampTz)", "description": "Prepare timestamp of the transaction. The value is in number of microseconds since PostgreSQL epoch (2000-01-01)."}, {"format": "Int32 (TransactionId)", "description": "Xid of the transaction."}, {"format": "String", "description": "The user defined GID of the prepared transaction."}]}, "comparison_hash": "465c922a6200dc4867b30cdb9d75453ddb89b57b11cfc63ab0bcda9cfbe78d57", "manual_language": "zh"}}}, "snapshot": {"facts": [{"label": "\u5c42\u6b21", "value": "\u903b\u8f91\u590d\u5236\u8f7d\u8377\uff0c\u4e0e\u524d\u540e\u7aef\u6d88\u606f\u5c01\u88c5\u5206\u5f00\u3002"}, {"label": "\u9996\u4e2a\u5b57\u6bb5", "value": "Byte1('p')"}], "fields": [{"format": "Byte1('p')", "description": "Identifies the message as a stream prepared transaction message."}, {"format": "Int8(0)", "description": "Flags; currently unused."}, {"format": "Int64 (XLogRecPtr)", "description": "The LSN of the prepare."}, {"format": "Int64 (XLogRecPtr)", "description": "The end LSN of the prepared transaction."}, {"format": "Int64 (TimestampTz)", "description": "Prepare timestamp of the transaction. The value is in number of microseconds since PostgreSQL epoch (2000-01-01)."}, {"format": "Int32 (TransactionId)", "description": "Xid of the transaction."}, {"format": "String", "description": "The user defined GID of the prepared transaction."}], "tables": [{"key": "fields", "rows": [{"c0": "1", "c1": "Byte1('p')", "c2": "\u5c06\u8be5\u6d88\u606f\u6807\u8bc6\u4e3a Stream Prepare \u6d88\u606f\u3002"}, {"c0": "2", "c1": "Int8(0)", "c2": "\u6807\u5fd7\uff1b\u76ee\u524d\u672a\u4f7f\u7528\u3002"}, {"c0": "3", "c1": "Int64 (XLogRecPtr)", "c2": "PREPARE \u7684 LSN\u3002"}, {"c0": "4", "c1": "Int64 (XLogRecPtr)", "c2": "\u9884\u5907\u4e8b\u52a1\u7684\u7ed3\u675f LSN\u3002"}, {"c0": "5", "c1": "Int64 (TimestampTz)", "c2": "\u4e8b\u52a1\u8fdb\u5165\u9884\u5907\u72b6\u6001\u7684\u65f6\u95f4\u6233\u3002\u5176\u503c\u4e3a\u81ea PostgreSQL \u7eaa\u5143\uff082000-01-01\uff09\u8d77\u7ecf\u8fc7\u7684\u5fae\u79d2\u6570\u3002"}, {"c0": "6", "c1": "Int32 (TransactionId)", "c2": "\u4e8b\u52a1\u7684 Xid\u3002"}, {"c0": "7", "c1": "\u5b57\u7b26\u4e32", "c2": "\u9884\u5907\u4e8b\u52a1\u7684\u7528\u6237\u5b9a\u4e49 GID\u3002"}], "title": "\u6309\u624b\u518c\u987a\u5e8f\u6392\u5217\u7684\u5b57\u6bb5", "columns": [{"key": "c0", "label": "\u4f4d\u7f6e"}, {"key": "c1", "label": "\u683c\u5f0f"}, {"key": "c2", "label": "\u542b\u4e49"}]}], "related": [{"url": "/docs/18/protocol-replication.html", "label": "\u6d41\u590d\u5236\u534f\u8bae"}, {"url": "/wiki/decode/?v=18", "label": "\u903b\u8f91\u89e3\u7801\u63d2\u4ef6"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2", "label": "18.6", "major": "18", "channel": "stable", "revision": "555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"}, "sources": [{"url": "https://pg.center/docs/18/protocol-logicalrep-message-formats.html#PROTOCOL-LOGICALREP-MESSAGE-FORMATS-STREAM-PREPARE", "path": "protocol-logicalrep-message-formats.html", "label": "PostgreSQL 18 English manual", "sha256": "e976b008206820fbeb1eba226e69bb7c00af157372c3545375d1b5053c76d0ad", "language": "en", "original_url": "/docs/18/protocol-logicalrep-message-formats.html#PROTOCOL-LOGICALREP-MESSAGE-FORMATS-STREAM-PREPARE"}], "sections": [{"title": "\u534f\u8bae\u4e0a\u4e0b\u6587", "paragraphs": ["\u672c\u8282\u8bf4\u660e\u5404\u903b\u8f91\u590d\u5236\u6d88\u606f\u7684\u8be6\u7ec6\u683c\u5f0f\u3002\u8fd9\u4e9b\u6d88\u606f\u7531\u590d\u5236\u69fd SQL \u63a5\u53e3\u8fd4\u56de\uff0c\u6216\u7531 walsender \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": "Stream Prepare", "description": ["\u903b\u8f91\u590d\u5236 Stream Prepare \u683c\u5f0f\uff0c\u8868\u793a\u6d41\u5f0f\u4e8b\u52a1\u9884\u5907\u6d88\u606f\u3002"], "manual_html": "<dl><dd>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\">Byte1('p')</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5c06\u8be5\u6d88\u606f\u6807\u8bc6\u4e3a Stream Prepare \u6d88\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int8(0)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6807\u5fd7\uff1b\u76ee\u524d\u672a\u4f7f\u7528\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int64 (XLogRecPtr)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>PREPARE \u7684 LSN\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int64 (XLogRecPtr)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u9884\u5907\u4e8b\u52a1\u7684\u7ed3\u675f LSN\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int64 (TimestampTz)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e8b\u52a1\u8fdb\u5165\u9884\u5907\u72b6\u6001\u7684\u65f6\u95f4\u6233\u3002\u5176\u503c\u4e3a\u81ea PostgreSQL \u7eaa\u5143\uff082000-01-01\uff09\u8d77\u7ecf\u8fc7\u7684\u5fae\u79d2\u6570\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\">Int32 (TransactionId)</span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e8b\u52a1\u7684 Xid\u3002</p>\n</p>\n</dd>\n<dt lang=\"zh\">\u5b57\u7b26\u4e32</dt>\n<dd>\n<p lang=\"zh\">\n<p>\u9884\u5907\u4e8b\u52a1\u7684\u7528\u6237\u5b9a\u4e49 GID\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n</dd></dl>", "manual_path": "/docs/18/protocol-logicalrep-message-formats.html", "localization": {"status": "complete", "sources": [{"url": "/docs/18/datatype-json.html", "method": "same-major semantic node", "sha256": "b9e8f98a0b5f2a4ec7b5197d02ab40c0ac0635a678c32728aaadd43cb4cd3766", "language": "zh", "matched_nodes": ["#DATATYPE-JSON/div[19]/pre[27]/em[4]/code[0]"]}, {"url": "/docs/18/protocol-logicalrep-message-formats.html", "method": "same-major semantic node", "sha256": "61e6f991cfe7587d83d1c5e849d29aaaa85476953480ace0ec4dd00cbb25556b", "language": "zh", "matched_nodes": ["#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[2]/dl[0]/dd[1]/div[0]/dl[0]/dd[7]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[2]/dl[0]/dd[5]/div[0]/dl[0]/dd[3]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[1]/div[0]/dl[0]/dd[11]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[1]/div[0]/dl[0]/dd[3]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[1]/div[0]/dl[0]/dd[5]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[1]/div[0]/dl[0]/dd[7]", "#PROTOCOL-LOGICALREP-MESSAGE-FORMATS/div[6]/dl[0]/dd[9]/div[0]/dl[0]/dd[1]"]}], "language": "zh", "original_text": {"/versions/18/description/0": "Logical replication Stream Prepare format. Identifies the message as a stream prepared transaction 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 a stream prepared transaction message.", "/versions/18/tables/0/rows/1/c2": "Flags; currently unused.", "/versions/18/tables/0/rows/2/c2": "The LSN of the prepare.", "/versions/18/tables/0/rows/3/c2": "The end LSN of the prepared transaction.", "/versions/18/tables/0/rows/4/c2": "Prepare timestamp of the transaction. The value is in number of microseconds since PostgreSQL epoch (2000-01-01).", "/versions/18/tables/0/rows/5/c2": "Xid of the transaction.", "/versions/18/tables/0/rows/6/c1": "String", "/versions/18/tables/0/rows/6/c2": "The user defined GID of the prepared transaction.", "/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. The following message parts are shared by the above messages.", "/versions/18/tables/0/columns/0/label": "Position", "/versions/18/tables/0/columns/1/label": "Format", "/versions/18/tables/0/columns/2/label": "Meaning"}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "5129a4b8331fd517a342991a532f2f264fcf1682feba5a36401047c0ab09b4c7"}, "comparison_data": {"layer": "logical replication", "fields": [{"format": "Byte1('p')", "description": "Identifies the message as a stream prepared transaction message."}, {"format": "Int8(0)", "description": "Flags; currently unused."}, {"format": "Int64 (XLogRecPtr)", "description": "The LSN of the prepare."}, {"format": "Int64 (XLogRecPtr)", "description": "The end LSN of the prepared transaction."}, {"format": "Int64 (TimestampTz)", "description": "Prepare timestamp of the transaction. The value is in number of microseconds since PostgreSQL epoch (2000-01-01)."}, {"format": "Int32 (TransactionId)", "description": "Xid of the transaction."}, {"format": "String", "description": "The user defined GID of the prepared transaction."}]}, "comparison_hash": "465c922a6200dc4867b30cdb9d75453ddb89b57b11cfc63ab0bcda9cfbe78d57", "manual_language": "zh"}, "comparison": {"left": "14", "right": "15", "status": "added", "diff": "--- PostgreSQL 14\n+++ PostgreSQL 15\n@@ -1 +1,33 @@\n-\u8be5\u7248\u672a\u6536\u5f55\n+{\n+  \"fields\": [\n+    {\n+      \"description\": \"Identifies the message as a stream prepared transaction message.\",\n+      \"format\": \"Byte1('p')\"\n+    },\n+    {\n+      \"description\": \"Flags; currently unused.\",\n+      \"format\": \"Int8(0)\"\n+    },\n+    {\n+      \"description\": \"The LSN of the prepare.\",\n+      \"format\": \"Int64 (XLogRecPtr)\"\n+    },\n+    {\n+      \"description\": \"The end LSN of the prepared transaction.\",\n+      \"format\": \"Int64 (XLogRecPtr)\"\n+    },\n+    {\n+      \"description\": \"Prepare timestamp of the transaction. The value is in number of microseconds since PostgreSQL epoch (2000-01-01).\",\n+      \"format\": \"Int64 (TimestampTz)\"\n+    },\n+    {\n+      \"description\": \"Xid of the transaction.\",\n+      \"format\": \"Int32 (TransactionId)\"\n+    },\n+    {\n+      \"description\": \"The user defined GID of the prepared transaction.\",\n+      \"format\": \"String\"\n+    }\n+  ],\n+  \"layer\": \"logical replication\"\n+}"}}