Connection Open Method Connection Object Record Open Method Recordset Open Method Stream Open Method METHOD   Connection::OpenSchema Set rsobject = connectionobject.OpenSchema (QueryType, Criteria, SchemaID) The OpenSchema method returns a read-only RecordSet object that contains schema (which means self-descriptive) information about the data source. For example, schema information can include the names of the tables, the names of the columns in the tables, and the data type of each column.   There is one mandatory parameter and two optional parameters.   The mandatory QueryType parameter is one of the SchemaEnum constants that describes the type of schema to use. There are 41 types of these SchemaEnum values to choose from. However, OLE DB specifications only require that three of these possibilities be supported. They are, adSchemaColumns, adSchemaProviderTypes, and adSchemaTables. Further, the provider is not required by OLE DB to support the Constraint Columns values imposed by the optional Criteria parameter (discussed below) for these three schemas.   SchemaEnum Constants   Constant Value Description adSchemaColumns 4 Request column information adSchemaProviderTypes 22 Request provider type information adSchemaTables 20 Request table information   The optional Criteria parameter is a variant composed of an array of query constraints for each of the values in the SchemaEnum constants. These are called Constraint Columns and they set limits to the results obtained using a schema query.   The SchemaID parameter is required if the QueryType parameter is set to the adSchemaProviderSpecific constant. This indicates that the query is a provider schema that is not defined by OLE DB specifications.   SchemaEnum Constants and Constraint Columns Values   Constant Value Description Constraint Columns adSchemaAsserts 0 Returns the assertions CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME adSchemaCatalogs 1 Returns the catalog information CATALOG_NAME adSchemaCharacterSets 2 Returns the defined character set in the catalog CHARACTER_SET_CATALOG CHARACTER_SET_SCHEMA CHARACTER_SET_NAME adSchemaCheckConstraints 5 Returns the defined check constraints in the catalog CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME adSchemaCollations 3 Returns the defined character collations in the catalog COLLATION_CATALOG COLLATION_SCHEMA COLLATION_NAME adSchemaColumnDomainUsage 11 Returns the columns that are domain dependent DOMAIN_CATALOG DOMAIN_SCHEMA DOMAIN_NAME COLUMN_NAME adSchemaColumnPrivileges 13 Returns the column privilege information TABLE_CATALOG TABLE_SCHEMA TABLE_NAME COLUMN_NANE GRANTOR GRANTEE adSchemaColumns 4 Returns the columns information TABLE_CATALOG TABLE_SCHEMA TABLE_NAME COLUMN_NANE adSchemaConstraintColumnUsage 6 Returns the columns used by constraints COLUMN_NANE TABLE_CATALOG TABLE_SCHEMA TABLE_NAME adSchemaConstraintTableUsage 7 Returns the tables used by constraints TABLE_CATALOG TABLE_SCHEMA TABLE_NAME adSchemaCubes 32 Returns info about the cubes used for multi-dimensional data CATALOG_NAME SCHEMA_NAME CUBE_NAME adSchemaDBInfoKeywords 30 Return the keywords recognized by the provider none adSchemaDBInfoLiterals 31 Return the literals used in text commands by the provider none adSchemaDimensions 33 Returns info about the dimensions in a cube CATALOG_NAME SCHEMA_NAME CUBE_NAME DIMENSION_NAME DIMENSION_UNIQUE_NAME adSchemaForeignKeys 27 Returns the foreign key column PK_TABLE_CATALOG PK_TABLE_SCHEMA PK_TABLE_NAME FK_TABLE_CATALOG FK_TABLE_SCHEMA FK_TABLE_NAME adSchemaHierarchies 34 Returns hierarchy info for multi-dimensional data CATALOG_NAME SCHEMA_NAME CUBE_NAME DIMENSION_UNIQUE_NAME HIERARCHY_NAME HIERARCHY_UNIQUE_NAME adSchemaIndexes 12 Returns the indexes defined in a catalog TABLE_CATALOG TABLE_SCHEMA INDEX_NAME TYPE TABLE_NAME adSchemaKeyColumnUsage 8 Returns the defined key columns in the catalog COLUMN_NAME CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME TABLE_CATALOG TABLE_SCHEMA TABLE_NAME adSchemaLevels 35 Returns info about the levels in multi-dimensional data CATALOG_NAME SCHEMA_NAME CUBE_NAME DIMENSION_UNIQUE_NAME HIERARCHY_UNIQUE_NAME LEVEL_NAME LEVEL_UNIQUE_NAME adSchemaMeasures 36 Returns the measures for multi-dimensional data CATALOG_NAME SCHEMA_NAME CUBE_NAME MEASURE_NAME MEASURE_UNIQUE_NAME adSchemaMembers 38 Returns the available members for multi-dimensional data CATALOG_NAME SCHEMA_NAME CUBE_NAME DIMENSION_UNIQUE_NAME HIERARCHY_UNIQUE_NAME LEVEL_UNIQUE_NAME LEVEL_NUMBER MEMBER_NAME MEMBER_UNIQUE_NAME MEMBER_CAPTION MEMBER_TYPE TREE OPERATOR adSchemaPrimaryKeys 28 Returns the primary key columns PK_TABLE_CATALOG PK_TABLE_SCHEMA PK_TABLE_NAME adSchemaProcedureColumns 29 Returns info on columns returned by stored procedures PROCEDURE_CATALOG PROCEDURE_SCHEMA PROCEDURE_NAME COLUMN_NAME adSchemaProcedureParameters 26 Returns info on the parameters and return codes of stored procedures PROCEDURE_CATALOG PROCEDURE_SCHEMA PROCEDURE_NAME PARAMETER_NAME adSchemaProcedures 16 Returns info on the stored procedures PROCEDURE_CATALOG PROCEDURE_SCHEMA PROCEDURE_NAME PROCEDURE_TYPE adSchemaProperties 37 Returns info on the properties of each level of multi-dimensional data CATALOG_NAME SCHEMA_NAME CUBE_NAME DIMENSION_UNIQUE_NAME HIERARCHY_UNIQUE_NAME LEVEL_UNIQUE_NAME MEMBER_UNIQUE_NAME PROPERTY_TYPE PROPERTY_NAME adSchemaProviderSpecific -1 For provider-specific, non-standard schema provider specfic adSchemaProviderTypes 22 Returns the provider-supported data types DATA_TYPE BEST_MATCH adSchemaReferentialConstraints 9 Returns the defined referential constraints in the catalog CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME adSchemaSchemata 17 Returns the schema owned by a user CATALOG_NAME SCHEMA_NAME SCHEMA_OWNER adSchemaSQLLanguages 18 Returns the SQL language support info none adSchemaStatistics 19 Returns the defined statistics in a catalog TABLE_CATALOG TABLE_SCHEMA TABLE_NAME adSchemaTableConstraints 10 Returns the table contraints defined in the catalog CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME TABLE_CATALOG TABLE_SCHEMA TABLE_NAME CONSTRAINT_TYPE adSchemaTablePrivileges 14 Returns the privileges on tables TABLE_CATALOG TABLE_SCHEMA TABLE_NAME GRANTOR GRANTEE adSchemaTables 20 Returns the tables in a catalog TABLE_CATALOG TABLE_SCHEMA TABLE_NAME TABLE_TYPE adSchemaTranslations 21 Returns the character set translation info TRANSLATION_CATALOG TRANSLATION_SCHEMA TRANSLATION_NAME adSchemaTrustees 39 Not used none adSchemaUsagePrivileges 15 Returns the user privilege info OBJECT_CATALOG OBJECT_SCHEMA OBJECT_NAME OBJECT_TYPE GRANTOR GRANTEE adSchemaViewColumnUsage 24 Returns the column usage for viewed tables VIEW_CATALOG VIEW_SCHEMA VIEW_NAME adSchemaViews 23 Returns the views info from the catalog TABLE_CATALOG TABLE_SCHEMA TABLE_NAME adSchemaViewTableUsage 25 Returns the table usage for viewed tables VIEW_CATALOG VIEW_SCHEMA VIEW_NAME   Code (VBScript): Set objRecordset = objConnection.OpenSchema(adSchemaTables) Copyright 1999-2001 by Infinite Software Solutions, Inc. 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