1 files changed, 672 insertions, 0 deletions

diff --git a/servers/slapd/back-sql/init.c b/servers/slapd/back-sql/init.c
new file mode 100644
index 0000000..193d583
--- /dev/null
+++ b/servers/slapd/back-sql/init.c
@@ -0,0 +1,672 @@
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1999-2018 The OpenLDAP Foundation.
+ * Portions Copyright 1999 Dmitry Kovalev.
+ * Portions Copyright 2002 Pierangelo Masarati.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+/* ACKNOWLEDGEMENTS:
+ * This work was initially developed by Dmitry Kovalev for inclusion
+ * by OpenLDAP Software.  Additional significant contributors include
+ * Pierangelo Masarati.
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+#include <sys/types.h>
+#include "ac/string.h"
+
+#include "slap.h"
+#include "config.h"
+#include "proto-sql.h"
+
+int
+sql_back_initialize(
+	BackendInfo	*bi )
+{ 
+	static char *controls[] = {
+		LDAP_CONTROL_ASSERT,
+		LDAP_CONTROL_MANAGEDSAIT,
+		LDAP_CONTROL_NOOP,
+#ifdef SLAP_CONTROL_X_TREE_DELETE
+		SLAP_CONTROL_X_TREE_DELETE,
+#endif /* SLAP_CONTROL_X_TREE_DELETE */
+#ifndef BACKSQL_ARBITRARY_KEY
+		LDAP_CONTROL_PAGEDRESULTS,
+#endif /* ! BACKSQL_ARBITRARY_KEY */
+		NULL
+	};
+	int rc;
+
+	bi->bi_controls = controls;
+
+	bi->bi_flags |=
+#if 0
+		SLAP_BFLAG_INCREMENT |
+#endif
+		SLAP_BFLAG_REFERRALS;
+
+	Debug( LDAP_DEBUG_TRACE,"==>sql_back_initialize()\n", 0, 0, 0 );
+	
+	bi->bi_db_init = backsql_db_init;
+	bi->bi_db_config = config_generic_wrapper;
+	bi->bi_db_open = backsql_db_open;
+	bi->bi_db_close = backsql_db_close;
+	bi->bi_db_destroy = backsql_db_destroy;
+
+	bi->bi_op_abandon = 0;
+	bi->bi_op_compare = backsql_compare;
+	bi->bi_op_bind = backsql_bind;
+	bi->bi_op_unbind = 0;
+	bi->bi_op_search = backsql_search;
+	bi->bi_op_modify = backsql_modify;
+	bi->bi_op_modrdn = backsql_modrdn;
+	bi->bi_op_add = backsql_add;
+	bi->bi_op_delete = backsql_delete;
+	
+	bi->bi_chk_referrals = 0;
+	bi->bi_operational = backsql_operational;
+	bi->bi_entry_get_rw = backsql_entry_get;
+	bi->bi_entry_release_rw = backsql_entry_release;
+ 
+	bi->bi_connection_init = 0;
+
+	rc = backsql_init_cf( bi );
+	Debug( LDAP_DEBUG_TRACE,"<==sql_back_initialize()\n", 0, 0, 0 );
+	return rc;
+}
+
+int
+backsql_destroy( 
+	BackendInfo 	*bi )
+{
+	Debug( LDAP_DEBUG_TRACE, "==>backsql_destroy()\n", 0, 0, 0 );
+	Debug( LDAP_DEBUG_TRACE, "<==backsql_destroy()\n", 0, 0, 0 );
+	return 0;
+}
+
+int
+backsql_db_init(
+	BackendDB 	*bd,
+	ConfigReply	*cr )
+{
+	backsql_info	*bi;
+	int		rc = 0;
+ 
+	Debug( LDAP_DEBUG_TRACE, "==>backsql_db_init()\n", 0, 0, 0 );
+
+	bi = (backsql_info *)ch_calloc( 1, sizeof( backsql_info ) );
+	ldap_pvt_thread_mutex_init( &bi->sql_dbconn_mutex );
+	ldap_pvt_thread_mutex_init( &bi->sql_schema_mutex );
+
+	if ( backsql_init_db_env( bi ) != SQL_SUCCESS ) {
+		rc = -1;
+	}
+
+	bd->be_private = bi;
+	bd->be_cf_ocs = bd->bd_info->bi_cf_ocs;
+
+	Debug( LDAP_DEBUG_TRACE, "<==backsql_db_init()\n", 0, 0, 0 );
+
+	return rc;
+}
+
+int
+backsql_db_destroy(
+	BackendDB 	*bd,
+	ConfigReply	*cr )
+{
+	backsql_info	*bi = (backsql_info*)bd->be_private;
+ 
+	Debug( LDAP_DEBUG_TRACE, "==>backsql_db_destroy()\n", 0, 0, 0 );
+
+	backsql_free_db_env( bi );
+	ldap_pvt_thread_mutex_destroy( &bi->sql_dbconn_mutex );
+	backsql_destroy_schema_map( bi );
+	ldap_pvt_thread_mutex_destroy( &bi->sql_schema_mutex );
+
+	if ( bi->sql_dbname ) {
+		ch_free( bi->sql_dbname );
+	}
+	if ( bi->sql_dbuser ) {
+		ch_free( bi->sql_dbuser );
+	}
+	if ( bi->sql_dbpasswd ) {
+		ch_free( bi->sql_dbpasswd );
+	}
+	if ( bi->sql_dbhost ) {
+		ch_free( bi->sql_dbhost );
+	}
+	if ( bi->sql_upper_func.bv_val ) {
+		ch_free( bi->sql_upper_func.bv_val );
+		ch_free( bi->sql_upper_func_open.bv_val );
+		ch_free( bi->sql_upper_func_close.bv_val );
+	}
+	if ( bi->sql_concat_func ) {
+		ber_bvarray_free( bi->sql_concat_func );
+	}
+	if ( !BER_BVISNULL( &bi->sql_strcast_func ) ) {
+		ch_free( bi->sql_strcast_func.bv_val );
+	}
+	if ( !BER_BVISNULL( &bi->sql_children_cond ) ) {
+		ch_free( bi->sql_children_cond.bv_val );
+	}
+	if ( !BER_BVISNULL( &bi->sql_dn_match_cond ) ) {
+		ch_free( bi->sql_dn_match_cond.bv_val );
+	}
+	if ( !BER_BVISNULL( &bi->sql_subtree_cond ) ) {
+		ch_free( bi->sql_subtree_cond.bv_val );
+	}
+	if ( !BER_BVISNULL( &bi->sql_dn_oc_aliasing ) ) {
+		ch_free( bi->sql_dn_oc_aliasing.bv_val );
+	}
+	if ( bi->sql_oc_query ) {
+		ch_free( bi->sql_oc_query );
+	}
+	if ( bi->sql_at_query ) {
+		ch_free( bi->sql_at_query );
+	}
+	if ( bi->sql_id_query ) {
+		ch_free( bi->sql_id_query );
+	}
+	if ( bi->sql_has_children_query ) {
+		ch_free( bi->sql_has_children_query );
+	}
+	if ( bi->sql_insentry_stmt ) {
+		ch_free( bi->sql_insentry_stmt );
+	}
+	if ( bi->sql_delentry_stmt ) {
+		ch_free( bi->sql_delentry_stmt );
+	}
+	if ( bi->sql_renentry_stmt ) {
+		ch_free( bi->sql_renentry_stmt );
+	}
+	if ( bi->sql_delobjclasses_stmt ) {
+		ch_free( bi->sql_delobjclasses_stmt );
+	}
+	if ( !BER_BVISNULL( &bi->sql_aliasing ) ) {
+		ch_free( bi->sql_aliasing.bv_val );
+	}
+	if ( !BER_BVISNULL( &bi->sql_aliasing_quote ) ) {
+		ch_free( bi->sql_aliasing_quote.bv_val );
+	}
+
+	if ( bi->sql_anlist ) {
+		int	i;
+
+		for ( i = 0; !BER_BVISNULL( &bi->sql_anlist[ i ].an_name ); i++ )
+		{
+			ch_free( bi->sql_anlist[ i ].an_name.bv_val );
+		}
+		ch_free( bi->sql_anlist );
+	}
+
+	if ( bi->sql_baseObject ) {
+		entry_free( bi->sql_baseObject );
+	}
+	
+	ch_free( bi );
+	
+	Debug( LDAP_DEBUG_TRACE, "<==backsql_db_destroy()\n", 0, 0, 0 );
+	return 0;
+}
+
+int
+backsql_db_open(
+	BackendDB 	*bd,
+	ConfigReply	*cr )
+{
+	backsql_info 	*bi = (backsql_info*)bd->be_private;
+	struct berbuf	bb = BB_NULL;
+
+	Connection	conn = { 0 };
+	OperationBuffer opbuf;
+	Operation*	op;
+	SQLHDBC		dbh = SQL_NULL_HDBC;
+	void		*thrctx = ldap_pvt_thread_pool_context();
+
+	Debug( LDAP_DEBUG_TRACE, "==>backsql_db_open(): "
+		"testing RDBMS connection\n", 0, 0, 0 );
+	if ( bi->sql_dbname == NULL ) {
+		Debug( LDAP_DEBUG_TRACE, "backsql_db_open(): "
+			"datasource name not specified "
+			"(use \"dbname\" directive in slapd.conf)\n", 0, 0, 0 );
+		return 1;
+	}
+
+	if ( bi->sql_concat_func == NULL ) {
+		Debug( LDAP_DEBUG_TRACE, "backsql_db_open(): "
+			"concat func not specified (use \"concat_pattern\" "
+			"directive in slapd.conf)\n", 0, 0, 0 );
+
+		if ( backsql_split_pattern( backsql_def_concat_func, 
+				&bi->sql_concat_func, 2 ) ) {
+			Debug( LDAP_DEBUG_TRACE, "backsql_db_open(): "
+				"unable to parse pattern \"%s\"",
+				backsql_def_concat_func, 0, 0 );
+			return 1;
+		}
+	}
+
+	/*
+	 * see back-sql.h for default values
+	 */
+	if ( BER_BVISNULL( &bi->sql_aliasing ) ) {
+		ber_str2bv( BACKSQL_ALIASING,
+			STRLENOF( BACKSQL_ALIASING ),
+			1, &bi->sql_aliasing );
+	}
+
+	if ( BER_BVISNULL( &bi->sql_aliasing_quote ) ) {
+		ber_str2bv( BACKSQL_ALIASING_QUOTE,
+			STRLENOF( BACKSQL_ALIASING_QUOTE ),
+			1, &bi->sql_aliasing_quote );
+	}
+
+	/*
+	 * Prepare cast string as required
+	 */
+	if ( bi->sql_upper_func.bv_val ) {
+		char buf[1024];
+
+		if ( BACKSQL_UPPER_NEEDS_CAST( bi ) ) {
+			snprintf( buf, sizeof( buf ), 
+				"%s(cast (" /* ? as varchar(%d))) */ , 
+				bi->sql_upper_func.bv_val );
+			ber_str2bv( buf, 0, 1, &bi->sql_upper_func_open );
+
+			snprintf( buf, sizeof( buf ),
+				/* (cast(? */ " as varchar(%d)))",
+				BACKSQL_MAX_DN_LEN );
+			ber_str2bv( buf, 0, 1, &bi->sql_upper_func_close );
+
+		} else {
+			snprintf( buf, sizeof( buf ), "%s(" /* ?) */ ,
+					bi->sql_upper_func.bv_val );
+			ber_str2bv( buf, 0, 1, &bi->sql_upper_func_open );
+
+			ber_str2bv( /* (? */ ")", 0, 1, &bi->sql_upper_func_close );
+		}
+	}
+
+	/* normalize filter values only if necessary */
+	bi->sql_caseIgnoreMatch = mr_find( "caseIgnoreMatch" );
+	assert( bi->sql_caseIgnoreMatch != NULL );
+
+	bi->sql_telephoneNumberMatch = mr_find( "telephoneNumberMatch" );
+	assert( bi->sql_telephoneNumberMatch != NULL );
+
+	if ( bi->sql_dbuser == NULL ) {
+		Debug( LDAP_DEBUG_TRACE, "backsql_db_open(): "
+			"user name not specified "
+			"(use \"dbuser\" directive in slapd.conf)\n", 0, 0, 0 );
+		return 1;
+	}
+	
+	if ( BER_BVISNULL( &bi->sql_subtree_cond ) ) {
+		/*
+		 * Prepare concat function for subtree search condition
+		 */
+		struct berval	concat;
+		struct berval	values[] = {
+			BER_BVC( "'%'" ),
+			BER_BVC( "?" ),
+			BER_BVNULL
+		};
+		struct berbuf	bb = BB_NULL;
+
+		Debug( LDAP_DEBUG_TRACE, "backsql_db_open(): "
+			"subtree search SQL condition not specified "
+			"(use \"subtree_cond\" directive in slapd.conf); "
+			"preparing default\n", 
+			0, 0, 0);
+
+		if ( backsql_prepare_pattern( bi->sql_concat_func, values, 
+				&concat ) ) {
+			Debug( LDAP_DEBUG_TRACE, "backsql_db_open(): "
+				"unable to prepare CONCAT pattern for subtree search",
+				0, 0, 0 );
+			return 1;
+		}
+			
+		if ( bi->sql_upper_func.bv_val ) {
+
+			/*
+			 * UPPER(ldap_entries.dn) LIKE UPPER(CONCAT('%',?))
+			 */
+
+			backsql_strfcat_x( &bb, NULL, "blbbb",
+					&bi->sql_upper_func,
+					(ber_len_t)STRLENOF( "(ldap_entries.dn) LIKE " ),
+						"(ldap_entries.dn) LIKE ",
+					&bi->sql_upper_func_open,
+					&concat,
+					&bi->sql_upper_func_close );
+
+		} else {
+
+			/*
+			 * ldap_entries.dn LIKE CONCAT('%',?)
+			 */
+
+			backsql_strfcat_x( &bb, NULL, "lb",
+					(ber_len_t)STRLENOF( "ldap_entries.dn LIKE " ),
+						"ldap_entries.dn LIKE ",
+					&concat );
+		}
+
+		ch_free( concat.bv_val );
+
+		bi->sql_subtree_cond = bb.bb_val;
+			
+		Debug( LDAP_DEBUG_TRACE, "backsql_db_open(): "
+			"setting \"%s\" as default \"subtree_cond\"\n",
+			bi->sql_subtree_cond.bv_val, 0, 0 );
+	}
+
+	if ( bi->sql_children_cond.bv_val == NULL ) {
+		/*
+		 * Prepare concat function for children search condition
+		 */
+		struct berval	concat;
+		struct berval	values[] = {
+			BER_BVC( "'%,'" ),
+			BER_BVC( "?" ),
+			BER_BVNULL
+		};
+		struct berbuf	bb = BB_NULL;
+
+		Debug( LDAP_DEBUG_TRACE, "backsql_db_open(): "
+			"children search SQL condition not specified "
+			"(use \"children_cond\" directive in slapd.conf); "
+			"preparing default\n", 
+			0, 0, 0);
+
+		if ( backsql_prepare_pattern( bi->sql_concat_func, values, 
+				&concat ) ) {
+			Debug( LDAP_DEBUG_TRACE, "backsql_db_open(): "
+				"unable to prepare CONCAT pattern for children search", 0, 0, 0 );
+			return 1;
+		}
+			
+		if ( bi->sql_upper_func.bv_val ) {
+
+			/*
+			 * UPPER(ldap_entries.dn) LIKE UPPER(CONCAT('%,',?))
+			 */
+
+			backsql_strfcat_x( &bb, NULL, "blbbb",
+					&bi->sql_upper_func,
+					(ber_len_t)STRLENOF( "(ldap_entries.dn) LIKE " ),
+						"(ldap_entries.dn) LIKE ",
+					&bi->sql_upper_func_open,
+					&concat,
+					&bi->sql_upper_func_close );
+
+		} else {
+
+			/*
+			 * ldap_entries.dn LIKE CONCAT('%,',?)
+			 */
+
+			backsql_strfcat_x( &bb, NULL, "lb",
+					(ber_len_t)STRLENOF( "ldap_entries.dn LIKE " ),
+						"ldap_entries.dn LIKE ",
+					&concat );
+		}
+
+		ch_free( concat.bv_val );
+
+		bi->sql_children_cond = bb.bb_val;
+			
+		Debug( LDAP_DEBUG_TRACE, "backsql_db_open(): "
+			"setting \"%s\" as default \"children_cond\"\n",
+			bi->sql_children_cond.bv_val, 0, 0 );
+	}
+
+	if ( bi->sql_dn_match_cond.bv_val == NULL ) {
+		/*
+		 * Prepare concat function for dn match search condition
+		 */
+		struct berbuf	bb = BB_NULL;
+
+		Debug( LDAP_DEBUG_TRACE, "backsql_db_open(): "
+			"DN match search SQL condition not specified "
+			"(use \"dn_match_cond\" directive in slapd.conf); "
+			"preparing default\n", 
+			0, 0, 0);
+
+		if ( bi->sql_upper_func.bv_val ) {
+
+			/*
+			 * UPPER(ldap_entries.dn)=?
+			 */
+
+			backsql_strfcat_x( &bb, NULL, "blbcb",
+					&bi->sql_upper_func,
+					(ber_len_t)STRLENOF( "(ldap_entries.dn)=" ),
+						"(ldap_entries.dn)=",
+					&bi->sql_upper_func_open,
+					'?',
+					&bi->sql_upper_func_close );
+
+		} else {
+
+			/*
+			 * ldap_entries.dn=?
+			 */
+
+			backsql_strfcat_x( &bb, NULL, "l",
+					(ber_len_t)STRLENOF( "ldap_entries.dn=?" ),
+						"ldap_entries.dn=?" );
+		}
+
+		bi->sql_dn_match_cond = bb.bb_val;
+			
+		Debug( LDAP_DEBUG_TRACE, "backsql_db_open(): "
+			"setting \"%s\" as default \"dn_match_cond\"\n",
+			bi->sql_dn_match_cond.bv_val, 0, 0 );
+	}
+
+	if ( bi->sql_oc_query == NULL ) {
+		if ( BACKSQL_CREATE_NEEDS_SELECT( bi ) ) {
+			bi->sql_oc_query =
+				ch_strdup( backsql_def_needs_select_oc_query );
+
+		} else {
+			bi->sql_oc_query = ch_strdup( backsql_def_oc_query );
+		}
+
+		Debug( LDAP_DEBUG_TRACE, "backsql_db_open(): "
+			"objectclass mapping SQL statement not specified "
+			"(use \"oc_query\" directive in slapd.conf)\n", 
+			0, 0, 0 );
+		Debug( LDAP_DEBUG_TRACE, "backsql_db_open(): "
+			"setting \"%s\" by default\n", bi->sql_oc_query, 0, 0 );
+	}
+	
+	if ( bi->sql_at_query == NULL ) {
+		Debug( LDAP_DEBUG_TRACE, "backsql_db_open(): "
+			"attribute mapping SQL statement not specified "
+			"(use \"at_query\" directive in slapd.conf)\n",
+			0, 0, 0 );
+		Debug(LDAP_DEBUG_TRACE, "backsql_db_open(): "
+			"setting \"%s\" by default\n",
+			backsql_def_at_query, 0, 0 );
+		bi->sql_at_query = ch_strdup( backsql_def_at_query );
+	}
+	
+	if ( bi->sql_insentry_stmt == NULL ) {
+		Debug( LDAP_DEBUG_TRACE, "backsql_db_open(): "
+			"entry insertion SQL statement not specified "
+			"(use \"insentry_stmt\" directive in slapd.conf)\n",
+			0, 0, 0 );
+		Debug(LDAP_DEBUG_TRACE, "backsql_db_open(): "
+			"setting \"%s\" by default\n",
+			backsql_def_insentry_stmt, 0, 0 );
+		bi->sql_insentry_stmt = ch_strdup( backsql_def_insentry_stmt );
+	}
+	
+	if ( bi->sql_delentry_stmt == NULL ) {
+		Debug( LDAP_DEBUG_TRACE, "backsql_db_open(): "
+			"entry deletion SQL statement not specified "
+			"(use \"delentry_stmt\" directive in slapd.conf)\n",
+			0, 0, 0 );
+		Debug( LDAP_DEBUG_TRACE, "backsql_db_open(): "
+			"setting \"%s\" by default\n",
+			backsql_def_delentry_stmt, 0, 0 );
+		bi->sql_delentry_stmt = ch_strdup( backsql_def_delentry_stmt );
+	}
+
+	if ( bi->sql_renentry_stmt == NULL ) {
+		Debug( LDAP_DEBUG_TRACE, "backsql_db_open(): "
+			"entry deletion SQL statement not specified "
+			"(use \"renentry_stmt\" directive in slapd.conf)\n",
+			0, 0, 0 );
+		Debug( LDAP_DEBUG_TRACE, "backsql_db_open(): "
+			"setting \"%s\" by default\n",
+			backsql_def_renentry_stmt, 0, 0 );
+		bi->sql_renentry_stmt = ch_strdup( backsql_def_renentry_stmt );
+	}
+
+	if ( bi->sql_delobjclasses_stmt == NULL ) {
+		Debug( LDAP_DEBUG_TRACE, "backsql_db_open(): "
+			"objclasses deletion SQL statement not specified "
+			"(use \"delobjclasses_stmt\" directive in slapd.conf)\n",
+			0, 0, 0 );
+		Debug( LDAP_DEBUG_TRACE, "backsql_db_open(): "
+			"setting \"%s\" by default\n",
+			backsql_def_delobjclasses_stmt, 0, 0 );
+		bi->sql_delobjclasses_stmt = ch_strdup( backsql_def_delobjclasses_stmt );
+	}
+
+	/* This should just be to force schema loading */
+	connection_fake_init2( &conn, &opbuf, thrctx, 0 );
+	op = &opbuf.ob_op;
+	op->o_bd = bd;
+	if ( backsql_get_db_conn( op, &dbh ) != LDAP_SUCCESS ) {
+		Debug( LDAP_DEBUG_TRACE, "backsql_db_open(): "
+			"connection failed, exiting\n", 0, 0, 0 );
+		return 1;
+	}
+	if ( backsql_load_schema_map( bi, dbh ) != LDAP_SUCCESS ) {
+		Debug( LDAP_DEBUG_TRACE, "backsql_db_open(): "
+			"schema mapping failed, exiting\n", 0, 0, 0 );
+		return 1;
+	}
+	if ( backsql_free_db_conn( op, dbh ) != SQL_SUCCESS ) {
+		Debug( LDAP_DEBUG_TRACE, "backsql_db_open(): "
+			"connection free failed\n", 0, 0, 0 );
+	}
+	if ( !BACKSQL_SCHEMA_LOADED( bi ) ) {
+		Debug( LDAP_DEBUG_TRACE, "backsql_db_open(): "
+			"test failed, schema map not loaded - exiting\n",
+			0, 0, 0 );
+		return 1;
+	}
+
+	/*
+	 * Prepare ID selection query
+	 */
+	if ( bi->sql_id_query == NULL ) {
+		/* no custom id_query provided */
+		if ( bi->sql_upper_func.bv_val == NULL ) {
+			backsql_strcat_x( &bb, NULL, backsql_id_query, "dn=?", NULL );
+
+		} else {
+			if ( BACKSQL_HAS_LDAPINFO_DN_RU( bi ) ) {
+				backsql_strcat_x( &bb, NULL, backsql_id_query,
+						"dn_ru=?", NULL );
+			} else {
+				if ( BACKSQL_USE_REVERSE_DN( bi ) ) {
+					backsql_strfcat_x( &bb, NULL, "sbl",
+							backsql_id_query,
+							&bi->sql_upper_func, 
+							(ber_len_t)STRLENOF( "(dn)=?" ), "(dn)=?" );
+				} else {
+					backsql_strfcat_x( &bb, NULL, "sblbcb",
+							backsql_id_query,
+							&bi->sql_upper_func, 
+							(ber_len_t)STRLENOF( "(dn)=" ), "(dn)=",
+							&bi->sql_upper_func_open, 
+							'?', 
+							&bi->sql_upper_func_close );
+				}
+			}
+		}
+		bi->sql_id_query = bb.bb_val.bv_val;
+	}
+
+	/*
+	 * Prepare children count query
+	 */
+	BER_BVZERO( &bb.bb_val );
+	bb.bb_len = 0;
+	backsql_strfcat_x( &bb, NULL, "sbsb",
+			"SELECT COUNT(distinct subordinates.id) "
+			"FROM ldap_entries,ldap_entries ",
+			&bi->sql_aliasing, "subordinates "
+			"WHERE subordinates.parent=ldap_entries.id AND ",
+			&bi->sql_dn_match_cond );
+	bi->sql_has_children_query = bb.bb_val.bv_val;
+ 
+	/*
+	 * Prepare DN and objectClass aliasing bit of query
+	 */
+	BER_BVZERO( &bb.bb_val );
+	bb.bb_len = 0;
+	backsql_strfcat_x( &bb, NULL, "sbbsbsbbsb",
+			" ", &bi->sql_aliasing, &bi->sql_aliasing_quote,
+			"objectClass", &bi->sql_aliasing_quote,
+			",ldap_entries.dn ", &bi->sql_aliasing,
+			&bi->sql_aliasing_quote, "dn", &bi->sql_aliasing_quote );
+	bi->sql_dn_oc_aliasing = bb.bb_val;
+ 
+	/* should never happen! */
+	assert( bd->be_nsuffix != NULL );
+	
+	if ( BER_BVISNULL( &bd->be_nsuffix[ 1 ] ) ) {
+		/* enable if only one suffix is defined */
+		bi->sql_flags |= BSQLF_USE_SUBTREE_SHORTCUT;
+	}
+
+	bi->sql_flags |= BSQLF_CHECK_SCHEMA;
+	
+	Debug( LDAP_DEBUG_TRACE, "<==backsql_db_open(): "
+		"test succeeded, schema map loaded\n", 0, 0, 0 );
+	return 0;
+}
+
+int
+backsql_db_close(
+	BackendDB	*bd,
+	ConfigReply	*cr )
+{
+	backsql_info 	*bi = (backsql_info*)bd->be_private;
+
+	Debug( LDAP_DEBUG_TRACE, "==>backsql_db_close()\n", 0, 0, 0 );
+
+	backsql_conn_destroy( bi );
+
+	Debug( LDAP_DEBUG_TRACE, "<==backsql_db_close()\n", 0, 0, 0 );
+
+	return 0;
+}
+
+#if SLAPD_SQL == SLAPD_MOD_DYNAMIC
+
+/* conditionally define the init_module() function */
+SLAP_BACKEND_INIT_MODULE( sql )
+
+#endif /* SLAPD_SQL == SLAPD_MOD_DYNAMIC */
+