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INFORMATION.SCHEMA.CONSTRAINTCOLUMNUSAGE

persistent class INFORMATION.SCHEMA.CONSTRAINTCOLUMNUSAGE extends %Library.Persistent

SQL Table Name: CONSTRAINT_COLUMN_USAGE

Returns one row for each column for each CHECK, UNIQUE, PRIMARY KEY, FOREIGN KEY constraint, or assertion in the current namespace for tables that can be accessed by the current user in the current namespace. The rows list the columns that constitute each unique constraint, and the referencing columns in each foreign key constraint. Since Caché does not currently support CHECK constraints or assertions, CONSTRAINT_COLUMN_USAGE returns the same rows as KEY_COLUMN_USAGE

Inventory

Parameters Properties Methods Queries Indices ForeignKeys Triggers
1 7 1

Summary

Properties
COLUMNNAME CONSTRAINTCATALOG CONSTRAINTNAME CONSTRAINTSCHEMA
TABLECATALOG TABLENAME TABLESCHEMA
Methods
%AddToSaveSet %AddToSyncSet %CheckConstraints %CheckConstraintsForExtent
%ClassIsLatestVersion %ClassName %ComposeOid %ConstructClone
%Delete %DeleteExtent %DeleteId %DispatchClassMethod
%DispatchGetModified %DispatchGetProperty %DispatchMethod %DispatchSetModified
%DispatchSetMultidimProperty %DispatchSetProperty %Exists %ExistsId
%Extends %GUID %GUIDSet %GetLock
%GetParameter %GetSwizzleObject %Id %IsA
%IsModified %IsNull %KillExtent %LockExtent
%LockId %New %NormalizeObject %ObjectIsNull
%ObjectModified %Oid %OnBeforeAddToSync %OnDetermineClass
%Open %OpenId %OriginalNamespace %PackageName
%PurgeIndices %Reload %RemoveFromSaveSet %ResolveConcurrencyConflict
%RollBack %Save %SaveDirect %SerializeObject
%SetModified %SortBegin %SortEnd %SyncObjectIn
%SyncTransport %UnlockExtent %UnlockId %ValidateIndices
%ValidateObject

Parameters

parameter READONLY = 1;
READONLY = 1 means that objects can be created, opened but not saved or deleted. Tables are projected to SQL as READONLY.

Properties

property COLUMNNAME as %String(COLLATION="Upper",MAXLEN=128) [ SqlFieldName = COLUMN_NAME,Required ];
Name of the column.
property CONSTRAINTCATALOG as %String(MAXLEN=128) [ Calculated,SqlFieldName = CONSTRAINT_CATALOG ];
Table qualifier - always NULL in Caché.
property CONSTRAINTNAME as %String(COLLATION="Upper",MAXLEN=128) [ SqlFieldName = CONSTRAINT_NAME ];
Name of the constraint.
property CONSTRAINTSCHEMA as %String(COLLATION="Upper",MAXLEN=128) [ Calculated,SqlFieldName = CONSTRAINT_SCHEMA ];
Name of schema that contains the constraint. Always the same as the TABLE_SCHEMA.
property TABLECATALOG as %String(MAXLEN=128) [ Calculated,SqlFieldName = TABLE_CATALOG ];
Table qualifier - always NULL in Caché.
property TABLENAME as %String(COLLATION="Upper",MAXLEN=128) [ SqlFieldName = TABLE_NAME,Required ];
Name of the table.
property TABLESCHEMA as %String(COLLATION="Upper",MAXLEN=128) [ SqlFieldName = TABLE_SCHEMA,Required ];
Name of schema that contains the table.

Indices

•index (PKeyIndex on TABLESCHEMA,TABLENAME,CONSTRAINTNAME,COLUMNNAME) [PrimaryKey];