diff options
Diffstat (limited to 'doc/src/sgml/indexam.sgml')
| -rw-r--r-- | doc/src/sgml/indexam.sgml | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/doc/src/sgml/indexam.sgml b/doc/src/sgml/indexam.sgml index b36889b856b..340904142e4 100644 --- a/doc/src/sgml/indexam.sgml +++ b/doc/src/sgml/indexam.sgml @@ -117,6 +117,8 @@ typedef struct IndexAmRoutine bool amclusterable; /* does AM handle predicate locks? */ bool ampredlocks; + /* does AM support columns included with clause INCLUDING? */ + bool amcaninclude; /* type of data stored in index, or InvalidOid if variable */ Oid amkeytype; @@ -858,7 +860,8 @@ amrestrpos (IndexScanDesc scan); using <firstterm>unique indexes</>, which are indexes that disallow multiple entries with identical keys. An access method that supports this feature sets <structfield>amcanunique</> true. - (At present, only b-tree supports it.) + (At present, only B-tree supports it.) Columns which are present in the + <literal>INCLUDING</> clause are not used to enforce uniqueness. </para> <para> |