Index Properties (OLE DB)

The DBPROPSET_INDEX property set contains the following properties. All of these properties are in the Index property group.

Property ID	Description
DBPROP_INDEX_AUTOUPDATE	Type: VT_BOOL Typical R/W: R only Description: Auto Update Notes: For this provider, the value is always VARIANT_TRUE, which indicates that the index is automatically maintained.
DBPROP_INDEX_NULLCOLLATION	Type: VT_I4 Typical R/W: R only Description: NULL Collation Notes: Specifies how null values are collated in the index. For this provider, the value is always DBPROPVAL_NC_LOW, which indicates that null values are collated at the low end of the list.
DBPROP_INDEX_NULLS	Type: VT_I4 Typical R/W: R/W Description: NULL Keys Notes: Specifies whether null keys are allowed. For this provider, the value is always DBPROPVAL_IN_DISALLOWNULL, which indicates that the index does not allow entries where the key columns are NULL. If you try to insert an index entry with a null key, the provider returns an error. This provider supports indexes that are nullable and indexes where null values are disallowed.
DBPROP_INDEX_TYPE	Type: VT_I4 Typical R/W: R only Description: Index Type Notes: Specifies the type of the index.For this provider, the value is always DBPROPVAL_IT_BTREE.
DBPROP_INDEX_UNIQUE	Type: VT_BOOL Typical R/W: R/W Description: Unique Notes: Specifies whether index keys must be unique. The provider supports the following values: VARIANT_TRUE, which indicates that the index keys must be unique VARIANT_FALSE, which indicates that duplicate keys are allowed.

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