[[["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):2025-08-17。"],[[["\u003cp\u003eThe \u003ccode\u003eINFORMATION_SCHEMA.VECTOR_INDEXES\u003c/code\u003e view provides metadata for each vector index within a dataset, with each row representing a unique index.\u003c/p\u003e\n"],["\u003cp\u003eAccessing vector index metadata requires \u003ccode\u003ebigquery.tables.get\u003c/code\u003e or \u003ccode\u003ebigquery.tables.list\u003c/code\u003e IAM permissions, which are included in several predefined roles such as \u003ccode\u003eroles/bigquery.admin\u003c/code\u003e and \u003ccode\u003eroles/bigquery.dataViewer\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eVECTOR_INDEXES\u003c/code\u003e schema includes details like \u003ccode\u003eindex_name\u003c/code\u003e, \u003ccode\u003eindex_status\u003c/code\u003e (\u003ccode\u003eACTIVE\u003c/code\u003e, \u003ccode\u003ePENDING DISABLEMENT\u003c/code\u003e, \u003ccode\u003eTEMPORARILY DISABLED\u003c/code\u003e, or \u003ccode\u003ePERMANENTLY DISABLED\u003c/code\u003e), \u003ccode\u003ecreation_time\u003c/code\u003e, \u003ccode\u003ecoverage_percentage\u003c/code\u003e, and the \u003ccode\u003eDDL\u003c/code\u003e statement used to create the index.\u003c/p\u003e\n"],["\u003cp\u003eQueries on this view must include a dataset qualifier and the query execution location must match the region of the \u003ccode\u003eINFORMATION_SCHEMA\u003c/code\u003e view.\u003c/p\u003e\n"],["\u003cp\u003eAn index might not be populated if the indexed base table is less than 10MB, in which case the \u003ccode\u003ecoverage_percentage\u003c/code\u003e is 0, meaning it is not usable.\u003c/p\u003e\n"]]],[],null,["# VECTOR_INDEXES view\n===================\n\nThe `INFORMATION_SCHEMA.VECTOR_INDEXES` view contains one row for each vector\nindex in a dataset.\n\nRequired permissions\n--------------------\n\nTo see [vector index](/bigquery/docs/vector-index) metadata, you need the\n`bigquery.tables.get` or `bigquery.tables.list` Identity and Access Management (IAM)\npermission on the table with the index. Each of the following predefined\nIAM roles includes at least one of these permissions:\n\n- `roles/bigquery.admin`\n- `roles/bigquery.dataEditor`\n- `roles/bigquery.dataOwner`\n- `roles/bigquery.dataViewer`\n- `roles/bigquery.metadataViewer`\n- `roles/bigquery.user`\n\nFor more information about BigQuery permissions, see\n[Access control with IAM](/bigquery/docs/access-control).\n\nSchema\n------\n\nWhen you query the `INFORMATION_SCHEMA.VECTOR_INDEXES` view, the query results contain one row for each vector index in a dataset.\n\n\u003cbr /\u003e\n\nThe `INFORMATION_SCHEMA.VECTOR_INDEXES` view has the following schema:\n\nScope and syntax\n----------------\n\nQueries against this view must have a [dataset qualifier](/bigquery/docs/information-schema-intro#syntax). The\nfollowing table explains the region scope for this view:\n\n\u003cbr /\u003e\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\"\u003eDATASET_ID\u003c/var\u003e: the ID of your dataset. For more information, see [Dataset qualifier](/bigquery/docs/information-schema-intro#dataset_qualifier).\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\n**Example** \n\n -- Returns metadata for vector indexes in a single dataset.\n SELECT * FROM myDataset.INFORMATION_SCHEMA.VECTOR_INDEXES;\n\nExample\n-------\n\nThe following example shows all active vector indexes on tables in the dataset\n`my_dataset`, located in the project `my_project`. It includes their names, the\nDDL statements used to create them, and their coverage percentage. If an\nindexed base table is less than 10 MB, then its index is not populated, in\nwhich case the `coverage_percentage` value is 0. \n\n```googlesql\nSELECT table_name, index_name, ddl, coverage_percentage\nFROM my_project.my_dataset.INFORMATION_SCHEMA.VECTOR_INDEXES\nWHERE index_status = 'ACTIVE';\n```\n\nThe result is similar to the following: \n\n```\n+------------+------------+-------------------------------------------------------------------------------------------------+---------------------+\n| table_name | index_name | ddl | coverage_percentage |\n+------------+------------+-------------------------------------------------------------------------------------------------+---------------------+\n| table1 | indexa | CREATE VECTOR INDEX `indexa` ON `my_project.my_dataset.table1`(embeddings) | 100 |\n| | | OPTIONS (distance_type = 'EUCLIDEAN', index_type = 'IVF', ivf_options = '{\"num_lists\": 100}') | |\n+------------+------------+-------------------------------------------------------------------------------------------------+---------------------+\n| table2 | indexb | CREATE VECTOR INDEX `indexb` ON `my_project.my_dataset.table2`(vectors) | 42 |\n| | | OPTIONS (distance_type = 'COSINE', index_type = 'IVF', ivf_options = '{\"num_lists\": 500}') | |\n+------------+------------+-------------------------------------------------------------------------------------------------+---------------------+\n| table3 | indexc | CREATE VECTOR INDEX `indexc` ON `my_project.my_dataset.table3`(vectors) | 98 |\n| | | OPTIONS (distance_type = 'DOT_PRODUCT', index_type = 'TREE_AH', | |\n| | | tree_ah_options = '{\"leaf_node_embedding_count\": 1000, \"normalization_type\": \"NONE\"}') | |\n+------------+------------+-------------------------------------------------------------------------------------------------+---------------------+\n```"]]