git.sur5r.net Git - openldap/blob - servers/slapd/back-sql/sql-wrap.c

   1 /*
   2  *       Copyright 1999, Dmitry Kovalev <mit@openldap.org>, All rights reserved.
   3  *
   4  *       Redistribution and use in source and binary forms are permitted only
   5  *       as authorized by the OpenLDAP Public License.  A copy of this
   6  *       license is available at http://www.OpenLDAP.org/license.html or
   7  *       in file LICENSE in the top-level directory of the distribution.
   8  */
   9
  10 #include "portable.h"
  11
  12 #ifdef SLAPD_SQL
  13
  14 #include <stdio.h>
  15 #include <string.h>
  16 #include <sys/types.h>
  17 #include "slap.h"
  18 #include "back-sql.h"
  19 #include "sql-types.h"
  20 #include "sql-wrap.h"
  21 #include "schema-map.h"
  22
  23 #define MAX_ATTR_LEN 16384
  24
  25 typedef struct backsql_conn
  26 {
  27  int ldap_cid;
  28  SQLHDBC dbh;
  29 }backsql_db_conn;
  30
  31 int backsql_dummy(void *,void *);
  32
  33 void backsql_PrintErrors(SQLHENV henv, SQLHDBC hdbc, SQLHSTMT sth,int rc)
  34 {
  35  SQLCHAR           msg[SQL_MAX_MESSAGE_LENGTH];    /* msg. buffer    */
  36  SQLCHAR           state[SQL_SQLSTATE_SIZE];       /* statement buf. */
  37  SDWORD        iSqlCode;                              /* return code    */
  38  SWORD       len=SQL_MAX_MESSAGE_LENGTH-1;                               /* return length  */
  39
  40
  41  Debug(LDAP_DEBUG_TRACE,"Return code: %d\n", rc,0,0);
  42
  43  while((rc=SQLError(henv,hdbc,sth,state,&iSqlCode,msg,
  44              SQL_MAX_MESSAGE_LENGTH - 1, &len)) == SQL_SUCCESS
  45         || rc == SQL_SUCCESS_WITH_INFO
  46        )
  47  {
  48   Debug(LDAP_DEBUG_TRACE,"SQL engine state: %s\n", state,0,0);
  49   Debug(LDAP_DEBUG_TRACE,"Native error code: %d\n",(int) iSqlCode,0,0);
  50   Debug(LDAP_DEBUG_TRACE,"Message: %s\n",msg,0,0);
  51  }
  52 }
  53
  54 RETCODE backsql_Prepare(SQLHDBC dbh,SQLHSTMT *sth,char* query,int timeout)
  55 {
  56  RETCODE rc;
  57  char drv_name[30];
  58  SWORD len;
  59  int i;
  60
  61  rc=SQLAllocStmt(dbh,sth);
  62  if (rc != SQL_SUCCESS)
  63   return rc;
  64
  65  //Debug(LDAP_DEBUG_TRACE,"==>_SQLPrepare()\n", 0,0,0);
  66  SQLGetInfo(dbh,SQL_DRIVER_NAME,drv_name,30,&len);
  67  //Debug(LDAP_DEBUG_TRACE,"_SQLPrepare(): driver name='%s'\n", drv_name,0,0);
  68  for (i=0;i<30 && drv_name[i];i++)
  69   drv_name[i]=toupper(drv_name[i]);
  70  if (!strncmp(drv_name,"SQLSRV32.DLL",30))
  71   {
  72    //stupid default result set in MS SQL Server does not support multiple active statements
  73    //on the same connection -- so we are trying to make it not to use default result set...
  74    Debug(LDAP_DEBUG_TRACE,"_SQLprepare(): enabling MS SQL Server default result set workaround\n", 0,0,0);
  75    rc=SQLSetStmtOption(*sth,SQL_CONCURRENCY,SQL_CONCUR_ROWVER);
  76    if (rc != SQL_SUCCESS && rc != SQL_SUCCESS_WITH_INFO)
  77    {
  78     Debug(LDAP_DEBUG_TRACE,"_SQLPrepare(): SQLSetStmtOption(SQL_CONCURRENCY,SQL_CONCUR_ROWVER) failed:\n", 0,0,0);
  79     backsql_PrintErrors(SQL_NULL_HENV,dbh,sth,rc);
  80    }
  81   }
  82  if (timeout>0)
  83   {
  84    Debug(LDAP_DEBUG_TRACE,"_SQLprepare(): setting query timeout to %d sec.\n", timeout,0,0);
  85    if ((rc=SQLSetStmtOption(*sth,SQL_QUERY_TIMEOUT,timeout)) != SQL_SUCCESS)
  86     {
  87      backsql_PrintErrors(SQL_NULL_HENV,dbh,sth,rc);
  88     }
  89   }
  90
  91  //Debug(LDAP_DEBUG_TRACE,"<==_SQLPrepare() calling SQLPrepare()\n", 0,0,0);
  92  return SQLPrepare(*sth,query,SQL_NTS);
  93 }
  94
  95 RETCODE backsql_BindParamStr(SQLHSTMT sth,int par_ind,char *str,int maxlen)
  96 {
  97  RETCODE rc;
  98  SQLINTEGER len=SQL_NTS;
  99
 100  rc=SQLBindParameter(sth,(SQLUSMALLINT)par_ind,SQL_PARAM_INPUT,SQL_C_CHAR,SQL_VARCHAR,
 101          (SQLUINTEGER)maxlen,0,(SQLPOINTER)str,(SQLUINTEGER)maxlen,NULL);
 102  return rc;
 103 }
 104
 105 RETCODE backsql_BindParamID(SQLHSTMT sth,int par_ind,unsigned long *id)
 106 {
 107
 108  return SQLBindParameter(sth,(SQLUSMALLINT)par_ind,SQL_PARAM_INPUT,SQL_C_ULONG,SQL_INTEGER,
 109          0,0,(SQLPOINTER)id,0,(SQLINTEGER*)NULL);
 110 }
 111
 112 RETCODE backsql_BindRowAsStrings(SQLHSTMT sth,BACKSQL_ROW_NTS *row)
 113 {
 114  RETCODE rc;
 115  SQLCHAR colname[64];
 116  SQLSMALLINT name_len,col_type,col_scale,col_null;
 117  UDWORD col_prec;
 118  int i;
 119
 120  if (row == NULL)
 121   return SQL_ERROR;
 122
 123  //Debug(LDAP_DEBUG_TRACE,"==> backsql_BindRowAsStrings()\n",0,0,0);
 124  rc=SQLNumResultCols(sth,&row->ncols);
 125  if (rc != SQL_SUCCESS)
 126  {
 127   //Debug(LDAP_DEBUG_TRACE,"_SQLBindRowAsStrings(): SQLNumResultCols() failed:\n",0,0,0);
 128   backsql_PrintErrors(SQL_NULL_HENV,SQL_NULL_HDBC,sth,rc);
 129  }
 130  else
 131  {
 132   //Debug(LDAP_DEBUG_TRACE,"backsql_BindRowAsStrings: ncols=%d\n",(int)row->ncols,0,0);
 133   row->col_names=(char**)ch_calloc(row->ncols,sizeof(char*));
 134   row->cols=(char**)ch_calloc(row->ncols,sizeof(char*));
 135   row->col_prec=(UDWORD*)ch_calloc(row->ncols,sizeof(UDWORD));
 136   row->is_null=(SQLINTEGER*)ch_calloc(row->ncols,sizeof(SQLINTEGER));
 137   for (i=1;i<=row->ncols;i++)
 138   {
 139    rc=SQLDescribeCol(sth,(SQLSMALLINT)i,&colname[0],(SQLUINTEGER)sizeof(colname)-1,&name_len,&col_type,
 140           (UDWORD*) &col_prec,&col_scale,&col_null);
 141    row->col_names[i-1]=ch_strdup(colname);
 142    //Debug(LDAP_DEBUG_TRACE,"backsql_BindRowAsStrings: col_name=%s, col_prec[%d]=%d\n",colname,(int)i,(int)col_prec);
 143    if (col_type == SQL_LONGVARCHAR || col_type== SQL_LONGVARBINARY)
 144    {
 145         //row->cols[i-1]=NULL;
 146     //row->col_prec[i-1]=-1;
 147         //such fields must be handled in some other way since they return 2G
 148         //as their precision (at least it does so with MS SQL Server w/native driver)
 149         //for now, we just set fixed precision for such fields - dirty hack, but...
 150         //no time to deal with SQLGetData()
 151         col_prec=MAX_ATTR_LEN;
 152         row->cols[i-1]=(char*)ch_calloc((col_prec+1),sizeof(char));
 153     row->col_prec[i-1]=col_prec;
 154         rc=SQLBindCol(sth,(SQLUSMALLINT)i,SQL_C_CHAR,(SQLPOINTER)row->cols[i-1],col_prec+1,
 155                                                        &row->is_null[i-1]);
 156    }
 157    else
 158    {
 159     row->cols[i-1]=(char*)ch_calloc((col_prec+1),sizeof(char));
 160     row->col_prec[i-1]=col_prec;
 161         rc=SQLBindCol(sth,(SQLUSMALLINT)i,SQL_C_CHAR,(SQLPOINTER)row->cols[i-1],col_prec+1,
 162                                                        &row->is_null[i-1]);
 163    }
 164   }
 165  }
 166  //Debug(LDAP_DEBUG_TRACE,"<== backsql_BindRowAsStrings()\n",0,0,0);
 167  return rc;
 168 }
 169
 170 RETCODE backsql_FreeRow(BACKSQL_ROW_NTS *row)
 171 {
 172  int i;
 173
 174  if (row->cols == NULL)
 175   return SQL_ERROR;
 176  for(i=0;i<row->ncols;i++)
 177   {
 178    free(row->cols[i]);
 179   }
 180  free(row->col_names);
 181  free(row->col_prec);
 182  free(row->cols);
 183  free(row->is_null);
 184  return SQL_SUCCESS;
 185 }
 186
 187 int backsql_cmp_connid(backsql_db_conn *c1,backsql_db_conn *c2)
 188 {
 189  if (c1->ldap_cid > c2->ldap_cid)
 190   return 1;
 191  if (c1->ldap_cid < c2->ldap_cid)
 192   return -1;
 193  return 0;
 194 }
 195
 196
 197 int backsql_close_db_conn(backsql_db_conn *conn)
 198 {
 199  Debug(LDAP_DEBUG_TRACE,"==>backsql_close_db_conn()\n",0,0,0);
 200  SQLDisconnect(conn->dbh);
 201  SQLFreeConnect(conn->dbh);
 202  Debug(LDAP_DEBUG_TRACE,"<==backsql_close_db_conn()\n",0,0,0);
 203  return 1;
 204 }
 205
 206 int backsql_init_db_env(backsql_info *si)
 207 {
 208  RETCODE rc;
 209  Debug(LDAP_DEBUG_TRACE,"==>backsql_init_db_env()\n",0,0,0);
 210  if ((rc=SQLAllocEnv(&si->db_env)) != SQL_SUCCESS)
 211   {
 212    Debug(LDAP_DEBUG_TRACE,"init_db_env: SQLAllocEnv failed:\n",0,0,0);
 213    backsql_PrintErrors(SQL_NULL_HENV,SQL_NULL_HDBC,SQL_NULL_HENV,rc);
 214   }
 215  Debug(LDAP_DEBUG_TRACE,"<==backsql_init_db_env()\n",0,0,0);
 216  return SQL_SUCCESS;
 217 }
 218
 219 int backsql_free_db_env(backsql_info *si)
 220 {
 221  Debug(LDAP_DEBUG_TRACE,"==>backsql_free_db_env()\n",0,0,0);
 222  //Debug(LDAP_DEBUG_TRACE,"free_db_env(): delete AVL tree here!!!\n",0,0,0);
 223
 224  //stop, if frontend waits for all threads to shutdown before calling this --
 225  //then what we are going to delete?? everything is deleted already...
 226  Debug(LDAP_DEBUG_TRACE,"<==backsql_free_db_env()\n",0,0,0);
 227  return SQL_SUCCESS;
 228 }
 229
 230 backsql_db_conn* backsql_open_db_conn(backsql_info *si,int ldap_cid)
 231 {
 232  backsql_db_conn *dbc=(backsql_db_conn*)ch_calloc(1,sizeof(backsql_db_conn));
 233  int rc;
 234
 235  Debug(LDAP_DEBUG_TRACE,"==>backsql_open_db_conn()\n",0,0,0);
 236  dbc->ldap_cid=ldap_cid;
 237  if ((rc=SQLAllocConnect(si->db_env,&dbc->dbh)) != SQL_SUCCESS && rc != SQL_SUCCESS_WITH_INFO)
 238   {
 239    Debug(LDAP_DEBUG_TRACE,"backsql_open_db_conn: SQLAllocConnect() failed:\n",0,0,0);
 240    backsql_PrintErrors(si->db_env,SQL_NULL_HDBC,SQL_NULL_HENV,rc);
 241    return NULL;
 242   }
 243  if ((rc=SQLConnect(dbc->dbh,si->dbname,SQL_NTS,si->dbuser,SQL_NTS,
 244                       si->dbpasswd,SQL_NTS) != SQL_SUCCESS))
 245   {
 246    if (rc != SQL_SUCCESS_WITH_INFO)
 247     Debug(LDAP_DEBUG_TRACE,"backsql_open_db_conn: SQLConnect() failed:\n",0,0,0);
 248    else
 249         Debug(LDAP_DEBUG_TRACE,"backsql_open_db_conn: SQLConnect() succeeded with info:\n",0,0,0);
 250    backsql_PrintErrors(si->db_env,dbc->dbh,SQL_NULL_HENV,rc);
 251    if (rc != SQL_SUCCESS_WITH_INFO)
 252     return NULL;
 253   }
 254
 255  Debug(LDAP_DEBUG_TRACE,"backsql_open_db_conn(): connected, adding to tree\n",0,0,0);
 256  ldap_pvt_thread_mutex_lock(&si->dbconn_mutex);
 257  avl_insert(&si->db_conns,dbc,(AVL_CMP)backsql_cmp_connid,backsql_dummy);
 258  ldap_pvt_thread_mutex_unlock(&si->dbconn_mutex);
 259  Debug(LDAP_DEBUG_TRACE,"<==backsql_open_db_conn()\n",0,0,0);
 260  return dbc;
 261 }
 262
 263 int backsql_free_db_conn(Backend *be,Connection *ldapc)
 264 {
 265  backsql_info *si=(backsql_info*)be->be_private;
 266  backsql_db_conn tmp,*conn;
 267
 268  Debug(LDAP_DEBUG_TRACE,"==>backsql_free_db_conn()\n",0,0,0);
 269  tmp.ldap_cid=ldapc->c_connid;
 270  ldap_pvt_thread_mutex_lock(&si->dbconn_mutex);
 271  conn=(backsql_db_conn*)avl_delete(&si->db_conns,&tmp,(AVL_CMP)backsql_cmp_connid);
 272  ldap_pvt_thread_mutex_unlock(&si->dbconn_mutex);
 273  //we have one thread per connection, as I understand -- so we can
 274  //get this out of critical section
 275  if (conn!=NULL)
 276   {
 277    Debug(LDAP_DEBUG_TRACE,"backsql_free_db_conn(): closing db connection\n",0,0,0);
 278    backsql_close_db_conn(conn);
 279   }
 280  Debug(LDAP_DEBUG_TRACE,"<==backsql_free_db_conn()\n",0,0,0);
 281  return SQL_SUCCESS;
 282 }
 283
 284 SQLHDBC backsql_get_db_conn(Backend *be,Connection *ldapc)
 285 {
 286  backsql_info *si=(backsql_info*)be->be_private;
 287  backsql_db_conn *dbc;
 288  backsql_db_conn tmp;
 289
 290  Debug(LDAP_DEBUG_TRACE,"==>backsql_get_db_conn()\n",0,0,0);
 291
 292  tmp.ldap_cid=ldapc->c_connid;
 293  //we have one thread per connection, as I understand -- so we do not need
 294  // locking here
 295  dbc=(backsql_db_conn*)avl_find(si->db_conns,&tmp,(AVL_CMP)backsql_cmp_connid);
 296  if (!dbc)
 297   dbc=backsql_open_db_conn(si,ldapc->c_connid);
 298
 299  if (!dbc)
 300  {
 301    Debug(LDAP_DEBUG_TRACE,"backsql_get_db_conn(): could not get connection handle -- returning NULL\n",0,0,0);
 302    return NULL;
 303  }
 304  ldap_pvt_thread_mutex_lock(&si->schema_mutex);
 305  if (!si->schema_loaded)
 306   {
 307    Debug(LDAP_DEBUG_TRACE,"backsql_get_db_conn(): first call -- reading schema map\n",0,0,0);
 308    backsql_load_schema_map(si,dbc->dbh);
 309   }
 310  ldap_pvt_thread_mutex_unlock(&si->schema_mutex);
 311
 312  Debug(LDAP_DEBUG_TRACE,"<==backsql_get_db_conn()\n",0,0,0);
 313  return dbc->dbh;
 314 }
 315
 316 #endif /* SLAPD_SQL */