[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["很难理解","hardToUnderstand","thumb-down"],["信息或示例代码不正确","incorrectInformationOrSampleCode","thumb-down"],["没有我需要的信息/示例","missingTheInformationSamplesINeed","thumb-down"],["翻译问题","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["最后更新时间 (UTC):2025-08-27。"],[[["\u003cp\u003eThe \u003ccode\u003eINFORMATION_SCHEMA.RESERVATION_CHANGES\u003c/code\u003e view provides a real-time log of all changes made to reservations within the administration project, with each row representing a single change event.\u003c/p\u003e\n"],["\u003cp\u003eQuerying this view requires the \u003ccode\u003ebigquery.reservations.list\u003c/code\u003e IAM permission, which is included in several predefined roles like \u003ccode\u003eroles/bigquery.resourceAdmin\u003c/code\u003e and \u003ccode\u003eroles/bigquery.user\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eEach entry in the view includes details like the \u003ccode\u003echange_timestamp\u003c/code\u003e, \u003ccode\u003eproject_id\u003c/code\u003e, \u003ccode\u003ereservation_name\u003c/code\u003e, \u003ccode\u003eaction\u003c/code\u003e (CREATE, UPDATE, DELETE), and other information about the change.\u003c/p\u003e\n"],["\u003cp\u003eThe view retains data on current and deleted reservations for up to 41 days before they are removed.\u003c/p\u003e\n"],["\u003cp\u003eQueries to this view need to specify a region using a region qualifier, and the query execution location must match the region of the view.\u003c/p\u003e\n"]]],[],null,["# RESERVATION_CHANGES view\n========================\n\nThe `INFORMATION_SCHEMA.RESERVATION_CHANGES` view contains a near real-time list\nof all changes to reservations within the administration project. Each row\nrepresents a change to a single reservation. For more information, see\n[Introduction to reservations](/bigquery/docs/reservations-intro).\n\nRequired permission\n-------------------\n\nTo query the `INFORMATION_SCHEMA.RESERVATION_CHANGES` view, you need\nthe `bigquery.reservations.list` Identity and Access Management (IAM) permission on the\nproject.\nEach of the following predefined IAM roles includes the required\npermission:\n\n- BigQuery Resource Admin (`roles/bigquery.resourceAdmin`)\n- BigQuery Resource Editor (`roles/bigquery.resourceEditor`)\n- BigQuery Resource Viewer (`roles/bigquery.resourceViewer`)\n- BigQuery User (`roles/bigquery.user`)\n- BigQuery Admin (`roles/bigquery.admin`)\n\nFor more information about BigQuery permissions, see\n[BigQuery IAM roles and permissions](/bigquery/docs/access-control).\n\nSchema\n------\n\nThe `INFORMATION_SCHEMA.RESERVATION_CHANGES` view has the\nfollowing schema:\n\nData retention\n--------------\n\nThis view contains current reservations and deleted reservations that are\nkept for a maximum of 41 days after which they are removed\nfrom the view.\n\nScope and syntax\n----------------\n\nQueries against this view must include a [region qualifier](/bigquery/docs/information-schema-intro#syntax).\nIf you do not specify a regional qualifier, metadata is retrieved from all\nregions. The following table explains the region scope for this view:\n\nReplace the following:\n\n- Optional: \u003cvar translate=\"no\"\u003ePROJECT_ID\u003c/var\u003e: the ID of your Google Cloud project. If not specified, the default project is used.\n- \u003cvar translate=\"no\"\u003eREGION\u003c/var\u003e: any [dataset region name](/bigquery/docs/locations). For example, ```region-us```.\n\n \u003cbr /\u003e\n\n \u003cbr /\u003e\n\n | **Note:** You must use [a region qualifier](/bigquery/docs/information-schema-intro#region_qualifier) to query `INFORMATION_SCHEMA` views. The location of the query execution must match the region of the `INFORMATION_SCHEMA` view.\n\n\u003cbr /\u003e\n\nExample\n-------\n\nThe following example gets the history of changes for a given reservation. Use\nthis information to see the list of changes made to a specific reservation, such\nas creating or deleting the reservation. \n\n```googlesql\nSELECT\n *\nFROM\n reservation-admin-project.`region-us`.\n INFORMATION_SCHEMA.RESERVATION_CHANGES\nWHERE\n reservation_name = \"\u003cvar translate=\"no\"\u003emy-reservation\u003c/var\u003e\"\nORDER BY\n change_timestamp DESC;\n```"]]