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| version 1.9, 2002/12/09 12:36:19 | version 1.23, 2004/12/23 15:57:41 |
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| Line 1 | Line 1 |
| /** @file | /** @file |
| Parser PgSQL driver. | Parser PgSQL driver. |
| Copyright(c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com) | Copyright(c) 2001, 2003 ArtLebedev Group (http://www.artlebedev.com) |
| Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) | Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) |
| Line 58 static char *lsplit(char **string_ref, c | Line 58 static char *lsplit(char **string_ref, c |
| return result; | return result; |
| } | } |
| static void toupper_str(char *out, const char *in, size_t size) { | |
| while(size--) | |
| *out++=(char)toupper(*in++); | |
| } | |
| struct Connection { | |
| SQL_Driver_services* services; | |
| PGconn *conn; | |
| const char* cstrClientCharset; | |
| }; | |
| /** | /** |
| PgSQL server driver | PgSQL server driver |
| */ | */ |
| Line 75 public: | Line 87 public: |
| dlink(dlopen_file_spec):"client library column is empty"; | dlink(dlopen_file_spec):"client library column is empty"; |
| } | } |
| #define throwPQerror services._throw(PQerrorMessage(conn)) | #define throwPQerror connection.services->_throw(PQerrorMessage(connection.conn)) |
| #define PQclear_throw(msg) { \ | #define PQclear_throw(msg) { \ |
| PQclear(res); \ | PQclear(res); \ |
| services._throw(msg); \ | connection.services->_throw(msg); \ |
| } | } |
| #define PQclear_throwPQerror PQclear_throw(PQerrorMessage(conn)) | #define PQclear_throwPQerror PQclear_throw(PQerrorMessage(connection.conn)) |
| /** connect | /** connect |
| @param used_only_in_connect_url | @param url |
| format: @b user:pass@host[:port]|[local]/database | format: @b user:pass@host[:port]|[local]/database |
| */ | */ |
| void connect( | void connect( |
| char *used_only_in_connect_url, | char *url, |
| SQL_Driver_services& services, | SQL_Driver_services& services, |
| void **connection ///< output: PGconn * | void **connection_ref ///< output: Connection* |
| ) { | ) { |
| char *user=used_only_in_connect_url; | char *user=url; |
| char *host=lsplit(user, '@'); | char *host=lsplit(user, '@'); |
| char *db=lsplit(host, '/'); | char *db=lsplit(host, '/'); |
| char *pwd=lsplit(user, ':'); | char *pwd=lsplit(user, ':'); |
| Line 99 public: | Line 111 public: |
| char *options=lsplit(db, '?'); | char *options=lsplit(db, '?'); |
| PGconn *conn=PQsetdbLogin( | char *cstrBackwardCompAskServerToTranscode=0; |
| Connection& connection=*(Connection *)services.malloc(sizeof(Connection)); | |
| *connection_ref=&connection; | |
| connection.services=&services; | |
| connection.cstrClientCharset=0; | |
| connection.conn=PQsetdbLogin( | |
| (host&&strcasecmp(host, "local")==0)?NULL/* local Unix domain socket */:host, port, | (host&&strcasecmp(host, "local")==0)?NULL/* local Unix domain socket */:host, port, |
| NULL, NULL, db, user, pwd); | NULL, NULL, db, user, pwd); |
| if(!conn) | if(!connection.conn) |
| services._throw("PQsetdbLogin failed"); | services._throw("PQsetdbLogin failed"); |
| if(PQstatus(conn)!=CONNECTION_OK) | if(PQstatus(connection.conn)!=CONNECTION_OK) |
| throwPQerror; | throwPQerror; |
| char *charset=0; | char *charset=0; |
| char *datestyle=0; | char *datestyle=0; |
| isDefaultTransaction = true; | |
| while(options) { | while(options) { |
| if(char *key=lsplit(&options, '&')) { | if(char *key=lsplit(&options, '&')) { |
| if(*key) { | if(*key) { |
| if(char *value=lsplit(key, '=')) { | if(char *value=lsplit(key, '=')) { |
| if(strcasecmp(key, "charset")==0) { | if(strcmp(key, "ClientCharset" ) == 0) { |
| charset=value; | toupper_str(value, value, strlen(value)); |
| connection.cstrClientCharset=value; | |
| } else if(strcasecmp(key, "charset")==0) { // left for backward compatibility, consider using ClientCharset | |
| cstrBackwardCompAskServerToTranscode=value; | |
| } else if(strcasecmp(key, "datestyle")==0) { | } else if(strcasecmp(key, "datestyle")==0) { |
| datestyle=value; | datestyle=value; |
| } else if(strcmp(key, "WithoutDefaultTransaction")==0) { | |
| isDefaultTransaction = false; | |
| } else | } else |
| services._throw("unknown connect option" /*key*/); | services._throw("unknown connect option" /*key*/); |
| } else | } else |
| Line 126 public: | Line 150 public: |
| } | } |
| } | } |
| if(charset) { | if(connection.cstrClientCharset && cstrBackwardCompAskServerToTranscode) |
| services._throw("use 'ClientCharset' option only, " | |
| "'charset' option is obsolete and should not be used with new 'ClientCharset' option"); | |
| if(cstrBackwardCompAskServerToTranscode) { | |
| // set CLIENT_ENCODING | // set CLIENT_ENCODING |
| char statement[MAX_STRING]="set CLIENT_ENCODING="; // win | char statement[MAX_STRING]="set CLIENT_ENCODING="; // win |
| strncat(statement, charset, MAX_STRING); | strncat(statement, cstrBackwardCompAskServerToTranscode, MAX_STRING); |
| PGresult *res=PQexec(conn, statement); | PGresult *res=PQexec(connection.conn, statement); |
| if(!res) | if(!res) |
| throwPQerror; | throwPQerror; |
| PQclear(res); // throw out the result [don't need but must call] | PQclear(res); // throw out the result [don't need but must call] |
| Line 142 public: | Line 170 public: |
| char statement[MAX_STRING]="set DATESTYLE="; // ISO,SQL,Postgres,European,NonEuropean=US,German,DEFAULT=ISO | char statement[MAX_STRING]="set DATESTYLE="; // ISO,SQL,Postgres,European,NonEuropean=US,German,DEFAULT=ISO |
| strncat(statement, charset, MAX_STRING); | strncat(statement, charset, MAX_STRING); |
| PGresult *res=PQexec(conn, statement); | PGresult *res=PQexec(connection.conn, statement); |
| if(!res) | if(!res) |
| throwPQerror; | throwPQerror; |
| PQclear(res); // throw out the result [don't need but must call] | PQclear(res); // throw out the result [don't need but must call] |
| } | } |
| *(PGconn **)connection=conn; | begin_transaction(connection); |
| begin_transaction(services, conn); | |
| } | } |
| void disconnect(void *connection) { | void disconnect(void *aconnection) { |
| PQfinish((PGconn *)connection); | Connection& connection=*static_cast<Connection*>(aconnection); |
| PQfinish(connection.conn); | |
| connection.conn=0; | |
| } | } |
| void commit(SQL_Driver_services& services, void *connection) { | void commit(void *aconnection) { |
| PGconn *conn=(PGconn *)connection; | if(isDefaultTransaction) |
| if(PGresult *res=PQexec(conn, "COMMIT")) | { |
| PQclear(res); | Connection& connection=*static_cast<Connection*>(aconnection); |
| else | |
| throwPQerror; | if(PGresult *res=PQexec(connection.conn, "COMMIT")) |
| begin_transaction(services, conn); | PQclear(res); |
| else | |
| throwPQerror; | |
| begin_transaction(connection); | |
| } | |
| } | } |
| void rollback(SQL_Driver_services& services, void *connection) { | void rollback(void *aconnection) { |
| PGconn *conn=(PGconn *)connection; | if(isDefaultTransaction) |
| if(PGresult *res=PQexec(conn, "ROLLBACK")) | { |
| PQclear(res); | Connection& connection=*static_cast<Connection*>(aconnection); |
| else | |
| throwPQerror; | if(PGresult *res=PQexec(connection.conn, "ROLLBACK")) |
| begin_transaction(services, conn); | PQclear(res); |
| else | |
| throwPQerror; | |
| begin_transaction(connection); | |
| } | |
| } | } |
| bool ping(SQL_Driver_services&, void *connection) { | bool ping(void *aconnection) { |
| return PQstatus((PGconn *)connection)==CONNECTION_OK; | Connection& connection=*static_cast<Connection*>(aconnection); |
| return PQstatus(connection.conn)==CONNECTION_OK; | |
| } | } |
| unsigned int quote( | const char* quote( |
| SQL_Driver_services&, void *connection, | void *aconnection, |
| char *to, const char *from, unsigned int length) { | const char *from, unsigned int length) { |
| if(to) { // store mode | Connection& connection=*static_cast<Connection*>(aconnection); |
| unsigned int result=length; | |
| while(length--) { | char *result=(char*)connection.services->malloc_atomic(length*2+1); |
| switch(*from) { | char *to=result; |
| case '\'': // "'" -> "''" | while(length--) { |
| *to++='\''; result++; | switch(*from) { |
| break; | case '\'': // "'" -> "''" |
| case '\\': // "\" -> "\\" | *to++='\''; |
| *to++='\''; result++; | break; |
| break; | case '\\': // "\" -> "\\" |
| } | *to++='\\'; |
| *to++=*from++; | break; |
| } | } |
| return result; | *to++=*from++; |
| } else // estimate mode | } |
| return length*2; | *to=0; |
| } | return result; |
| void query( | } |
| SQL_Driver_services& services, void *connection, | void query(void *aconnection, |
| const char *astatement, unsigned long offset, unsigned long limit, | const char *astatement, |
| size_t placeholders_count, Placeholder* placeholders, | |
| unsigned long offset, unsigned long limit, | |
| SQL_Driver_query_event_handlers& handlers) { | SQL_Driver_query_event_handlers& handlers) { |
| // _asm int 3; | // _asm int 3; |
| Connection& connection=*static_cast<Connection*>(aconnection); | |
| const char* cstrClientCharset=connection.cstrClientCharset; | |
| SQL_Driver_services& services=*connection.services; | |
| PGconn *conn=connection.conn; | |
| if(placeholders_count>0) | |
| services._throw("bind variables not supported (yet)"); | |
| // transcode from $request:charset to connect-string?client_charset | |
| if(cstrClientCharset) { | |
| size_t transcoded_statement_size; | |
| services.transcode(astatement, strlen(astatement), | |
| astatement, transcoded_statement_size, | |
| services.request_charset(), | |
| cstrClientCharset); | |
| } | |
| PGconn *conn=(PGconn *)connection; | const char *statement=preprocess_statement(connection, |
| const char *statement=preprocess_statement(services, conn, | |
| astatement, offset, limit); | astatement, offset, limit); |
| PGresult *res=PQexec(conn, statement); | PGresult *res=PQexec(conn, statement); |
| Line 239 public: | Line 295 public: |
| for(int i=0; i<column_count; i++){ | for(int i=0; i<column_count; i++){ |
| char *name=PQfname(res, i); | char *name=PQfname(res, i); |
| size_t size=strlen(name); | size_t length=strlen(name); |
| void *ptr=services.malloc(size); | char* strm=(char*)services.malloc(length+1); |
| memcpy(ptr, name, size); | memcpy(strm, name, length+1); |
| CHECK(handlers.add_column(sql_error, ptr, size)); | const char* str=strm; |
| // transcode to $request:charset from connect-string?client_charset | |
| if(cstrClientCharset) | |
| services.transcode(str, length, | |
| str, length, | |
| cstrClientCharset, | |
| services.request_charset()); | |
| CHECK(handlers.add_column(sql_error, str, length)); | |
| } | } |
| CHECK(handlers.before_rows(sql_error)); | CHECK(handlers.before_rows(sql_error)); |
| Line 252 public: | Line 317 public: |
| CHECK(handlers.add_row(sql_error)); | CHECK(handlers.add_row(sql_error)); |
| for(int i=0; i<column_count; i++){ | for(int i=0; i<column_count; i++){ |
| const char *cell=PQgetvalue(res, r, i); | const char *cell=PQgetvalue(res, r, i); |
| size_t size; | size_t length; |
| void *ptr; | const char* str; |
| if(PQftype(res, i)==OIDOID) { | if(PQftype(res, i)==OIDOID) { |
| // ObjectID column, read object bytes | // ObjectID column, read object bytes |
| Line 264 public: | Line 329 public: |
| // seek to end | // seek to end |
| if(lo_lseek(conn, fd, 0, SEEK_END)<0) | if(lo_lseek(conn, fd, 0, SEEK_END)<0) |
| PQclear_throwPQerror; | PQclear_throwPQerror; |
| // get size | // get length |
| int size_tell=lo_tell(conn, fd); | int size_tell=lo_tell(conn, fd); |
| if(size_tell<0) | if(size_tell<0) |
| PQclear_throwPQerror; | PQclear_throwPQerror; |
| // seek to begin | // seek to begin |
| if(lo_lseek(conn, fd, 0, SEEK_SET)<0) | if(lo_lseek(conn, fd, 0, SEEK_SET)<0) |
| PQclear_throwPQerror; | PQclear_throwPQerror; |
| size=(size_t)size_tell; | length=(size_t)size_tell; |
| if(size) { | if(length) { |
| // read | // read |
| ptr=services.malloc(size); | char* strm=(char*)services.malloc(length+1); |
| if(!lo_read_ex(conn, fd, (const char *)ptr, size_tell)) | if(!lo_read_ex(conn, fd, strm, size_tell)) |
| PQclear_throw("lo_read can not read all bytes of object"); | PQclear_throw("lo_read can not read all bytes of object"); |
| strm[length]=0; | |
| str=strm; | |
| } else | } else |
| ptr=0; | str=0; |
| if(lo_close(conn, fd)<0) | if(lo_close(conn, fd)<0) |
| PQclear_throwPQerror; | PQclear_throwPQerror; |
| } else | } else |
| PQclear_throwPQerror; | PQclear_throwPQerror; |
| } else { | } else { |
| // normal column, read it normally | // normal column, read it normally |
| size=(size_t)PQgetlength(res, r, i); | length=(size_t)PQgetlength(res, r, i); |
| if(size) { | if(length) { |
| ptr=services.malloc(size); | char* strm=(char*)services.malloc(length+1); |
| memcpy(ptr, cell, size); | memcpy(strm, cell, length+1); |
| str=strm; | |
| } else | } else |
| ptr=0; | str=0; |
| } | } |
| CHECK(handlers.add_row_cell(sql_error, ptr, size)); | |
| if(str && length) { | |
| // transcode to $request:charset from connect-string?client_charset | |
| if(cstrClientCharset) | |
| services.transcode(str, length, | |
| str, length, | |
| cstrClientCharset, | |
| services.request_charset()); | |
| } | |
| CHECK(handlers.add_row_cell(sql_error, str, length)); | |
| } | } |
| } | } |
| cleanup: | cleanup: |
| Line 303 cleanup: | Line 381 cleanup: |
| private: // private funcs | private: // private funcs |
| void begin_transaction(SQL_Driver_services& services, PGconn *conn) { | void begin_transaction(Connection& connection) { |
| if(PGresult *res=PQexec(conn, "BEGIN")) | if(isDefaultTransaction) |
| PQclear(res); | { |
| else | if(PGresult *res=PQexec(connection.conn, "BEGIN")) |
| throwPQerror; | PQclear(res); |
| else | |
| throwPQerror; | |
| } | |
| } | } |
| const char *preprocess_statement(SQL_Driver_services& services, PGconn *conn, | const char *preprocess_statement(Connection& connection, |
| const char *astatement, unsigned long offset, unsigned long limit) { | const char *astatement, unsigned long offset, unsigned long limit) { |
| PGconn *conn=connection.conn; | |
| size_t statement_size=strlen(astatement); | size_t statement_size=strlen(astatement); |
| char *result=(char *)services.malloc(statement_size | char *result=(char *)connection.services->malloc(statement_size |
| +MAX_NUMBER*2+15 // limit # offset # | +MAX_NUMBER*2+15 // limit # offset # |
| +MAX_STRING // in case of short 'strings' | +MAX_STRING // in case of short 'strings' |
| +1); | +1); |
| Line 338 private: // private funcs | Line 421 private: // private funcs |
| o[0]=='/' && | o[0]=='/' && |
| o[1]=='*' && | o[1]=='*' && |
| o[2]=='*') { // name start | o[2]=='*') { // name start |
| const char* saved_o=o; | |
| o+=3; | o+=3; |
| while(*o) | while(*o) |
| if( | if( |
| Line 345 private: // private funcs | Line 429 private: // private funcs |
| o[1]=='*' && | o[1]=='*' && |
| o[2]=='/' && | o[2]=='/' && |
| o[3]=='\'') { // name end | o[3]=='\'') { // name end |
| saved_o=0; // found, marking that | |
| o+=4; | o+=4; |
| Oid oid=lo_creat(conn, INV_READ|INV_WRITE); | Oid oid=lo_creat(conn, INV_READ|INV_WRITE); |
| if(oid==InvalidOid) | if(oid==InvalidOid) |
| Line 358 private: // private funcs | Line 443 private: // private funcs |
| if(escaped) { | if(escaped) { |
| // write pending, skip "\" or "'" | // write pending, skip "\" or "'" |
| if(!lo_write_ex(conn, fd, start, o-start)) | if(!lo_write_ex(conn, fd, start, o-start)) |
| services._throw("lo_write could not write all bytes of object (1)"); | connection.services->_throw("lo_write could not write all bytes of object (1)"); |
| start=++o; | start=++o; |
| } else | } else |
| o++; | o++; |
| } | } |
| if(!lo_write_ex(conn, fd, start, o-start)) | if(!lo_write_ex(conn, fd, start, o-start)) |
| services._throw("lo_write can not write all bytes of object (2)"); | connection.services->_throw("lo_write can not write all bytes of object (2)"); |
| if(lo_close(conn, fd)<0) | if(lo_close(conn, fd)<0) |
| throwPQerror; | throwPQerror; |
| } else | } else |
| Line 376 private: // private funcs | Line 461 private: // private funcs |
| break; | break; |
| } else | } else |
| o++; // /**skip**/'xxx' | o++; // /**skip**/'xxx' |
| if(saved_o) { | |
| o=saved_o; | |
| *n++=*o++; | |
| } | |
| } else | } else |
| *n++=*o++; | *n++=*o++; |
| } | } |
| Line 448 private: // conn client library funcs | Line 537 private: // conn client library funcs |
| private: // conn client library funcs linking | private: // conn client library funcs linking |
| const char *dlink(const char *dlopen_file_spec) { | const char *dlink(const char *dlopen_file_spec) { |
| if(lt_dlinit()) | |
| return lt_dlerror(); | |
| lt_dlhandle handle=lt_dlopen(dlopen_file_spec); | lt_dlhandle handle=lt_dlopen(dlopen_file_spec); |
| if(!handle) | if(!handle) |
| return "can not open the dynamic link module"; | return "can not open the dynamic link module"; |
| Line 481 private: // conn client library funcs li | Line 572 private: // conn client library funcs li |
| return 0; | return 0; |
| } | } |
| // Default transaction flag, if true make it. | |
| bool isDefaultTransaction; | |
| }; | }; |
| extern "C" SQL_Driver *SQL_DRIVER_CREATE() { | extern "C" SQL_Driver *SQL_DRIVER_CREATE() { |