openldap/servers/slapd/back-sql/sql-wrap.c

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/*
* Copyright 1999, Dmitry Kovalev (zmit@mail.ru), All rights reserved.
*
* Redistribution and use in source and binary forms are permitted only
* as authorized by the OpenLDAP Public License. A copy of this
* license is available at http://www.OpenLDAP.org/license.html or
* in file LICENSE in the top-level directory of the distribution.
*/
#include "portable.h"
#ifdef SLAPD_SQL
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include "slap.h"
#include "back-sql.h"
#include "sql-types.h"
#include "sql-wrap.h"
#include "schema-map.h"
#define MAX_ATTR_LEN 16384
typedef struct backsql_conn
{
int ldap_cid;
SQLHDBC dbh;
}backsql_db_conn;
int backsql_dummy(void *,void *);
void backsql_PrintErrors(SQLHENV henv, SQLHDBC hdbc, SQLHSTMT sth,int rc)
{
SQLCHAR msg[SQL_MAX_MESSAGE_LENGTH]; /* msg. buffer */
SQLCHAR state[SQL_SQLSTATE_SIZE]; /* statement buf. */
SDWORD iSqlCode; /* return code */
SWORD len=SQL_MAX_MESSAGE_LENGTH-1; /* return length */
Debug(LDAP_DEBUG_TRACE,"Return code: %d\n", rc,0,0);
while((rc=SQLError(henv,hdbc,sth,state,&iSqlCode,msg,
SQL_MAX_MESSAGE_LENGTH - 1, &len)) == SQL_SUCCESS
|| rc == SQL_SUCCESS_WITH_INFO
)
{
Debug(LDAP_DEBUG_TRACE,"SQL engine state: %s\n", state,0,0);
Debug(LDAP_DEBUG_TRACE,"Native error code: %d\n",(int) iSqlCode,0,0);
Debug(LDAP_DEBUG_TRACE,"Message: %s\n",msg,0,0);
}
}
RETCODE backsql_Prepare(SQLHDBC dbh,SQLHSTMT *sth,char* query,int timeout)
{
RETCODE rc;
char drv_name[30];
SWORD len;
int i;
rc=SQLAllocStmt(dbh,sth);
if (rc != SQL_SUCCESS)
return rc;
//Debug(LDAP_DEBUG_TRACE,"==>_SQLPrepare()\n", 0,0,0);
SQLGetInfo(dbh,SQL_DRIVER_NAME,drv_name,30,&len);
//Debug(LDAP_DEBUG_TRACE,"_SQLPrepare(): driver name='%s'\n", drv_name,0,0);
for (i=0;i<30 && drv_name[i];i++)
drv_name[i]=toupper(drv_name[i]);
if (!strncmp(drv_name,"SQLSRV32.DLL",30))
{
//stupid default result set in MS SQL Server does not support multiple active statements
//on the same connection -- so we are trying to make it not to use default result set...
Debug(LDAP_DEBUG_TRACE,"_SQLprepare(): enabling MS SQL Server default result set workaround\n", 0,0,0);
rc=SQLSetStmtOption(*sth,SQL_CONCURRENCY,SQL_CONCUR_ROWVER);
if (rc != SQL_SUCCESS && rc != SQL_SUCCESS_WITH_INFO)
{
Debug(LDAP_DEBUG_TRACE,"_SQLPrepare(): SQLSetStmtOption(SQL_CONCURRENCY,SQL_CONCUR_ROWVER) failed:\n", 0,0,0);
backsql_PrintErrors(SQL_NULL_HENV,dbh,sth,rc);
}
}
if (timeout>0)
{
Debug(LDAP_DEBUG_TRACE,"_SQLprepare(): setting query timeout to %d sec.\n", timeout,0,0);
if ((rc=SQLSetStmtOption(*sth,SQL_QUERY_TIMEOUT,timeout)) != SQL_SUCCESS)
{
backsql_PrintErrors(SQL_NULL_HENV,dbh,sth,rc);
}
}
//Debug(LDAP_DEBUG_TRACE,"<==_SQLPrepare() calling SQLPrepare()\n", 0,0,0);
return SQLPrepare(*sth,query,SQL_NTS);
}
RETCODE backsql_BindParamStr(SQLHSTMT sth,int par_ind,char *str,int maxlen)
{
RETCODE rc;
SQLINTEGER len=SQL_NTS;
rc=SQLBindParameter(sth,(SQLUSMALLINT)par_ind,SQL_PARAM_INPUT,SQL_C_CHAR,SQL_VARCHAR,
(SQLUINTEGER)maxlen,0,(SQLPOINTER)str,(SQLUINTEGER)maxlen,NULL);
return rc;
}
RETCODE backsql_BindParamID(SQLHSTMT sth,int par_ind,unsigned long *id)
{
return SQLBindParameter(sth,(SQLUSMALLINT)par_ind,SQL_PARAM_INPUT,SQL_C_ULONG,SQL_INTEGER,
0,0,(SQLPOINTER)id,0,(SQLINTEGER*)NULL);
}
RETCODE backsql_BindRowAsStrings(SQLHSTMT sth,BACKSQL_ROW_NTS *row)
{
RETCODE rc;
SQLCHAR colname[64];
SQLSMALLINT name_len,col_type,col_scale,col_null;
UDWORD col_prec;
int i;
if (row == NULL)
return SQL_ERROR;
//Debug(LDAP_DEBUG_TRACE,"==> backsql_BindRowAsStrings()\n",0,0,0);
rc=SQLNumResultCols(sth,&row->ncols);
if (rc != SQL_SUCCESS)
{
//Debug(LDAP_DEBUG_TRACE,"_SQLBindRowAsStrings(): SQLNumResultCols() failed:\n",0,0,0);
backsql_PrintErrors(SQL_NULL_HENV,SQL_NULL_HDBC,sth,rc);
}
else
{
//Debug(LDAP_DEBUG_TRACE,"backsql_BindRowAsStrings: ncols=%d\n",(int)row->ncols,0,0);
row->col_names=(char**)ch_calloc(row->ncols,sizeof(char*));
row->cols=(char**)ch_calloc(row->ncols,sizeof(char*));
row->col_prec=(UDWORD*)ch_calloc(row->ncols,sizeof(UDWORD));
row->is_null=(SQLINTEGER*)ch_calloc(row->ncols,sizeof(SQLINTEGER));
for (i=1;i<=row->ncols;i++)
{
rc=SQLDescribeCol(sth,(SQLSMALLINT)i,&colname[0],(SQLUINTEGER)sizeof(colname)-1,&name_len,&col_type,
(UDWORD*) &col_prec,&col_scale,&col_null);
row->col_names[i-1]=strdup(colname);
//Debug(LDAP_DEBUG_TRACE,"backsql_BindRowAsStrings: col_name=%s, col_prec[%d]=%d\n",colname,(int)i,(int)col_prec);
if (col_type == SQL_LONGVARCHAR || col_type== SQL_LONGVARBINARY)
{
//row->cols[i-1]=NULL;
//row->col_prec[i-1]=-1;
//such fields must be handled in some other way since they return 2G
//as their precision (at least it does so with MS SQL Server w/native driver)
//for now, we just set fixed precision for such fields - dirty hack, but...
//no time to deal with SQLGetData()
col_prec=MAX_ATTR_LEN;
row->cols[i-1]=(char*)ch_calloc((col_prec+1),sizeof(char));
row->col_prec[i-1]=col_prec;
rc=SQLBindCol(sth,(SQLUSMALLINT)i,SQL_C_CHAR,(SQLPOINTER)row->cols[i-1],col_prec+1,
&row->is_null[i-1]);
}
else
{
row->cols[i-1]=(char*)ch_calloc((col_prec+1),sizeof(char));
row->col_prec[i-1]=col_prec;
rc=SQLBindCol(sth,(SQLUSMALLINT)i,SQL_C_CHAR,(SQLPOINTER)row->cols[i-1],col_prec+1,
&row->is_null[i-1]);
}
}
}
//Debug(LDAP_DEBUG_TRACE,"<== backsql_BindRowAsStrings()\n",0,0,0);
return rc;
}
RETCODE backsql_FreeRow(BACKSQL_ROW_NTS *row)
{
int i;
if (row->cols == NULL)
return SQL_ERROR;
for(i=0;i<row->ncols;i++)
{
free(row->cols[i]);
}
free(row->col_names);
free(row->col_prec);
free(row->cols);
free(row->is_null);
return SQL_SUCCESS;
}
int backsql_cmp_connid(backsql_db_conn *c1,backsql_db_conn *c2)
{
if (c1->ldap_cid > c2->ldap_cid)
return 1;
if (c1->ldap_cid < c2->ldap_cid)
return -1;
return 0;
}
int backsql_close_db_conn(backsql_db_conn *conn)
{
Debug(LDAP_DEBUG_TRACE,"==>backsql_close_db_conn()\n",0,0,0);
SQLDisconnect(conn->dbh);
SQLFreeConnect(conn->dbh);
Debug(LDAP_DEBUG_TRACE,"<==backsql_close_db_conn()\n",0,0,0);
return 1;
}
int backsql_init_db_env(backsql_info *si)
{
RETCODE rc;
Debug(LDAP_DEBUG_TRACE,"==>backsql_init_db_env()\n",0,0,0);
if ((rc=SQLAllocEnv(&si->db_env)) != SQL_SUCCESS)
{
Debug(LDAP_DEBUG_TRACE,"init_db_env: SQLAllocEnv failed:\n",0,0,0);
backsql_PrintErrors(SQL_NULL_HENV,SQL_NULL_HDBC,SQL_NULL_HENV,rc);
}
Debug(LDAP_DEBUG_TRACE,"<==backsql_init_db_env()\n",0,0,0);
return SQL_SUCCESS;
}
int backsql_free_db_env(backsql_info *si)
{
Debug(LDAP_DEBUG_TRACE,"==>backsql_free_db_env()\n",0,0,0);
//Debug(LDAP_DEBUG_TRACE,"free_db_env(): delete AVL tree here!!!\n",0,0,0);
//stop, if frontend waits for all threads to shutdown before calling this --
//then what we are going to delete?? everything is deleted already...
Debug(LDAP_DEBUG_TRACE,"<==backsql_free_db_env()\n",0,0,0);
return SQL_SUCCESS;
}
backsql_db_conn* backsql_open_db_conn(backsql_info *si,int ldap_cid)
{
backsql_db_conn *dbc=(backsql_db_conn*)ch_calloc(1,sizeof(backsql_db_conn));
int rc;
Debug(LDAP_DEBUG_TRACE,"==>backsql_open_db_conn()\n",0,0,0);
dbc->ldap_cid=ldap_cid;
if ((rc=SQLAllocConnect(si->db_env,&dbc->dbh)) != SQL_SUCCESS && rc != SQL_SUCCESS_WITH_INFO)
{
Debug(LDAP_DEBUG_TRACE,"backsql_open_db_conn: SQLAllocConnect() failed:\n",0,0,0);
backsql_PrintErrors(si->db_env,SQL_NULL_HDBC,SQL_NULL_HENV,rc);
return NULL;
}
if ((rc=SQLConnect(dbc->dbh,si->dbname,SQL_NTS,si->dbuser,SQL_NTS,
si->dbpasswd,SQL_NTS) != SQL_SUCCESS))
{
if (rc != SQL_SUCCESS_WITH_INFO)
Debug(LDAP_DEBUG_TRACE,"backsql_open_db_conn: SQLConnect() failed:\n",0,0,0);
else
Debug(LDAP_DEBUG_TRACE,"backsql_open_db_conn: SQLConnect() succeeded with info:\n",0,0,0);
backsql_PrintErrors(si->db_env,dbc->dbh,SQL_NULL_HENV,rc);
if (rc != SQL_SUCCESS_WITH_INFO)
return NULL;
}
Debug(LDAP_DEBUG_TRACE,"backsql_open_db_conn(): connected, adding to tree\n",0,0,0);
ldap_pvt_thread_mutex_lock(&si->dbconn_mutex);
avl_insert(&si->db_conns,dbc,(AVL_CMP)backsql_cmp_connid,backsql_dummy);
ldap_pvt_thread_mutex_unlock(&si->dbconn_mutex);
Debug(LDAP_DEBUG_TRACE,"<==backsql_open_db_conn()\n",0,0,0);
return dbc;
}
int backsql_free_db_conn(Backend *be,Connection *ldapc)
{
backsql_info *si=(backsql_info*)be->be_private;
backsql_db_conn tmp,*conn;
Debug(LDAP_DEBUG_TRACE,"==>backsql_free_db_conn()\n",0,0,0);
tmp.ldap_cid=ldapc->c_connid;
ldap_pvt_thread_mutex_lock(&si->dbconn_mutex);
conn=(backsql_db_conn*)avl_delete(&si->db_conns,&tmp,(AVL_CMP)backsql_cmp_connid);
ldap_pvt_thread_mutex_unlock(&si->dbconn_mutex);
//we have one thread per connection, as I understand -- so we can
//get this out of critical section
if (conn!=NULL)
{
Debug(LDAP_DEBUG_TRACE,"backsql_free_db_conn(): closing db connection\n",0,0,0);
backsql_close_db_conn(conn);
}
Debug(LDAP_DEBUG_TRACE,"<==backsql_free_db_conn()\n",0,0,0);
return SQL_SUCCESS;
}
SQLHDBC backsql_get_db_conn(Backend *be,Connection *ldapc)
{
backsql_info *si=(backsql_info*)be->be_private;
backsql_db_conn *dbc;
backsql_db_conn tmp;
Debug(LDAP_DEBUG_TRACE,"==>backsql_get_db_conn()\n",0,0,0);
tmp.ldap_cid=ldapc->c_connid;
//we have one thread per connection, as I understand -- so we do not need
// locking here
dbc=(backsql_db_conn*)avl_find(si->db_conns,&tmp,(AVL_CMP)backsql_cmp_connid);
if (!dbc)
dbc=backsql_open_db_conn(si,ldapc->c_connid);
if (!dbc)
{
Debug(LDAP_DEBUG_TRACE,"backsql_get_db_conn(): could not get connection handle -- returning NULL\n",0,0,0);
return NULL;
}
ldap_pvt_thread_mutex_lock(&si->schema_mutex);
if (!si->schema_loaded)
{
Debug(LDAP_DEBUG_TRACE,"backsql_get_db_conn(): first call -- reading schema map\n",0,0,0);
backsql_load_schema_map(si,dbc->dbh);
}
ldap_pvt_thread_mutex_unlock(&si->schema_mutex);
Debug(LDAP_DEBUG_TRACE,"<==backsql_get_db_conn()\n",0,0,0);
return dbc->dbh;
}
#endif /* SLAPD_SQL */