ITS#7329 optimize index update for simple add ops

Don't need to reindex all the attr values if there were no deletes.

servers/slapd/back-bdb/modify.c

@@ -228,7 +228,9 @@ int bdb_modify_internal(
 
  			mod->sm_op = SLAP_MOD_SOFTDEL;
 
- 			if ( err == LDAP_NO_SUCH_ATTRIBUTE ) {
+			if ( err == LDAP_SUCCESS ) {
+				got_delete = 1;
+			} else if ( err == LDAP_NO_SUCH_ATTRIBUTE ) {
  				err = LDAP_SUCCESS;
  			}
 
@@ -338,6 +340,9 @@ int bdb_modify_internal(
 			if ( a2 ) {
 				/* need to detect which values were deleted */
 				int i, j;
+				/* let add know there were deletes */
+				if ( a2->a_flags & SLAP_ATTR_IXADD )
+					a2->a_flags |= SLAP_ATTR_IXDEL;
 				vals = op->o_tmpalloc( (ap->a_numvals + 1) *
 					sizeof(struct berval), op->o_tmpmemctx );
 				j = 0;
@@ -375,9 +380,42 @@ int bdb_modify_internal(
 	for ( ap = e->e_attrs; ap != NULL; ap = ap->a_next ) {
 		if (ap->a_flags & SLAP_ATTR_IXADD) {
 			ap->a_flags &= ~SLAP_ATTR_IXADD;
-			rc = bdb_index_values( op, tid, ap->a_desc,
-				ap->a_nvals,
-				e->e_id, SLAP_INDEX_ADD_OP );
+			if ( ap->a_flags & SLAP_ATTR_IXDEL ) {
+				/* if any values were deleted, we must readd index
+				 * for all remaining values.
+				 */
+				ap->a_flags &= ~SLAP_ATTR_IXDEL;
+				rc = bdb_index_values( op, tid, ap->a_desc,
+					ap->a_nvals,
+					e->e_id, SLAP_INDEX_ADD_OP );
+			} else {
+				/* if this was only an add, we only need to index
+				 * the added values.
+				 */
+				for ( ml = modlist; ml != NULL; ml = ml->sml_next ) {
+					struct berval *vals;
+					if ( ml->sml_desc != ap->a_desc || !ml->sml_numvals )
+						continue;
+					switch( ml->sml_op ) {
+					case LDAP_MOD_ADD:
+					case LDAP_MOD_REPLACE:
+					case LDAP_MOD_INCREMENT:
+					case SLAP_MOD_SOFTADD:
+					case SLAP_MOD_ADD_IF_NOT_PRESENT:
+						if ( ml->sml_op == LDAP_MOD_INCREMENT )
+							vals = ap->a_nvals;
+						else if ( ml->sml_nvalues )
+							vals = ml->sml_nvalues;
+						else
+							vals = ml->sml_values;
+						rc = bdb_index_values( op, tid, ap->a_desc,
+							vals, e->e_id, SLAP_INDEX_ADD_OP );
+						break;
+					}
+					if ( rc )
+						break;
+				}
+			}
 			if ( rc != LDAP_SUCCESS ) {
 				Debug( LDAP_DEBUG_ANY,
 				       "%s: attribute \"%s\" index add failure\n",

servers/slapd/back-mdb/modify.c

@@ -228,7 +228,9 @@ int mdb_modify_internal(
 
  			mod->sm_op = SLAP_MOD_SOFTDEL;
 
- 			if ( err == LDAP_NO_SUCH_ATTRIBUTE ) {
+			if ( err == LDAP_SUCCESS ) {
+				got_delete = 1;
+			} else if ( err == LDAP_NO_SUCH_ATTRIBUTE ) {
  				err = LDAP_SUCCESS;
  			}
 
@@ -338,6 +340,9 @@ int mdb_modify_internal(
 			if ( a2 ) {
 				/* need to detect which values were deleted */
 				int i, j;
+				/* let add know there were deletes */
+				if ( a2->a_flags & SLAP_ATTR_IXADD )
+					a2->a_flags |= SLAP_ATTR_IXDEL;
 				vals = op->o_tmpalloc( (ap->a_numvals + 1) *
 					sizeof(struct berval), op->o_tmpmemctx );
 				j = 0;
@@ -375,9 +380,42 @@ int mdb_modify_internal(
 	for ( ap = e->e_attrs; ap != NULL; ap = ap->a_next ) {
 		if (ap->a_flags & SLAP_ATTR_IXADD) {
 			ap->a_flags &= ~SLAP_ATTR_IXADD;
-			rc = mdb_index_values( op, tid, ap->a_desc,
-				ap->a_nvals,
-				e->e_id, SLAP_INDEX_ADD_OP );
+			if ( ap->a_flags & SLAP_ATTR_IXDEL ) {
+				/* if any values were deleted, we must readd index
+				 * for all remaining values.
+				 */
+				ap->a_flags &= ~SLAP_ATTR_IXDEL;
+				rc = mdb_index_values( op, tid, ap->a_desc,
+					ap->a_nvals,
+					e->e_id, SLAP_INDEX_ADD_OP );
+			} else {
+				/* if this was only an add, we only need to index
+				 * the added values.
+				 */
+				for ( ml = modlist; ml != NULL; ml = ml->sml_next ) {
+					struct berval *vals;
+					if ( ml->sml_desc != ap->a_desc || !ml->sml_numvals )
+						continue;
+					switch( ml->sml_op ) {
+					case LDAP_MOD_ADD:
+					case LDAP_MOD_REPLACE:
+					case LDAP_MOD_INCREMENT:
+					case SLAP_MOD_SOFTADD:
+					case SLAP_MOD_ADD_IF_NOT_PRESENT:
+						if ( ml->sml_op == LDAP_MOD_INCREMENT )
+							vals = ap->a_nvals;
+						else if ( ml->sml_nvalues )
+							vals = ml->sml_nvalues;
+						else
+							vals = ml->sml_values;
+						rc = mdb_index_values( op, tid, ap->a_desc,
+							vals, e->e_id, SLAP_INDEX_ADD_OP );
+						break;
+					}
+					if ( rc )
+						break;
+				}
+			}
 			if ( rc != LDAP_SUCCESS ) {
 				Debug( LDAP_DEBUG_ANY,
 				       "%s: attribute \"%s\" index add failure\n",