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| version 1.42, 2012/10/19 04:13:28 | version 1.49, 2021/11/03 16:27:15 |
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| Line 1 | Line 1 |
| /** @file | /** @file |
| Parser PgSQL driver. | Parser PgSQL driver. |
| Copyright (c) 2001-2012 Art. Lebedev Studio (http://www.artlebedev.com) | Copyright (c) 2001-2019 Art. Lebedev Studio (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 78 static char* rsplit(char* string, char d | Line 78 static char* rsplit(char* string, char d |
| return v+1; | return v+1; |
| } | } |
| } | } |
| return NULL; | return NULL; |
| } | } |
| static void toupper_str(char *out, const char *in, size_t size){ | static void toupper_str(char *out, const char *in, size_t size){ |
| Line 99 struct Connection { | Line 99 struct Connection { |
| PGconn *conn; | PGconn *conn; |
| const char* client_charset; | const char* client_charset; |
| bool autocommit; | bool autocommit; |
| bool without_default_transactions; | |
| bool standard_conforming_strings; | bool standard_conforming_strings; |
| }; | }; |
| Line 117 public: | Line 116 public: |
| /// initialize driver by loading sql dynamic link library | /// initialize driver by loading sql dynamic link library |
| const char *initialize(char *dlopen_file_spec){ | const char *initialize(char *dlopen_file_spec){ |
| return dlopen_file_spec? | return dlopen_file_spec ? dlink(dlopen_file_spec) : "client library column is empty"; |
| dlink(dlopen_file_spec):"client library column is empty"; | |
| } | } |
| #define throwPQerror connection.services->_throw(PQerrorMessage(connection.conn)) | #define throwPQerror connection.services->_throw(PQerrorMessage(connection.conn)) |
| #define PQclear_throw(msg) { \ | #define PQclear_throw(msg) { \ |
| PQclear(res); \ | PQclear(res); \ |
| connection.services->_throw(msg); \ | connection.services->_throw(msg); \ |
| } | } |
| #define PQclear_throwPQerror PQclear_throw(PQerrorMessage(connection.conn)) | #define PQclear_throwPQerror PQclear_throw(PQerrorMessage(connection.conn)) |
| /** connect | /** connect |
| Line 134 public: | Line 132 public: |
| ClientCharset=charset& // transcode by parser | ClientCharset=charset& // transcode by parser |
| charset=value& // transcode by server with 'SET CLIENT_ENCODING=value' | charset=value& // transcode by server with 'SET CLIENT_ENCODING=value' |
| datestyle=value& // 'SET DATESTYLE=value' available values are: ISO|SQL|Postgres|European|US|German [default=ISO] | datestyle=value& // 'SET DATESTYLE=value' available values are: ISO|SQL|Postgres|European|US|German [default=ISO] |
| autocommit=1& // each transaction is commited automatically (default) | autocommit=0& // 1 -- each statement is commited automatically, only when with_default_transaction enabled |
| WithoutDefaultTransaction=0 // 1 -- disable any BEGIN TRAN/COMMIT/ROLLBACK [can NOT be used with autocommit option] | standard_conforming_strings=1& // 0 -- escape \ char that could be needed for old servers |
| */ | */ |
| void connect( | void connect(char* url, SQL_Driver_services& services, void** connection_ref /* < output: Connection* */){ |
| char* url, | |
| SQL_Driver_services& services, | |
| void** connection_ref ///< output: Connection* | |
| ){ | |
| char* user=url; | char* user=url; |
| char* host=rsplit(user, '@'); | char* host=rsplit(user, '@'); |
| char* db=lsplit(host, '/'); | char* db=lsplit(host, '/'); |
| Line 154 public: | Line 148 public: |
| char* datestyle=0; | char* datestyle=0; |
| Connection& connection=*(Connection *)services.malloc(sizeof(Connection)); | Connection& connection=*(Connection *)services.malloc(sizeof(Connection)); |
| *connection_ref=&connection; | *connection_ref=&connection; |
| connection.services=&services; | connection.services=&services; |
| connection.client_charset=0; | connection.client_charset=0; |
| connection.autocommit=true; | connection.autocommit=true; |
| connection.without_default_transactions=false; | |
| connection.standard_conforming_strings=true; | connection.standard_conforming_strings=true; |
| connection.conn=PQsetdbLogin( | |
| (host&&strcasecmp(host, "local")==0)?NULL/* local Unix domain socket */:host, port, | |
| NULL, NULL, db, user, pwd); | |
| if(!connection.conn) | |
| services._throw("PQsetdbLogin failed"); | |
| if(PQstatus(connection.conn)!=CONNECTION_OK) | |
| throwPQerror; | |
| while(options){ | while(options){ |
| if(char *key=lsplit(&options, '&')){ | if(char *key=lsplit(&options, '&')){ |
| if(*key){ | if(*key){ |
| Line 183 public: | Line 167 public: |
| } else if(strcasecmp(key, "datestyle")==0){ | } else if(strcasecmp(key, "datestyle")==0){ |
| datestyle=value; | datestyle=value; |
| } else if(strcasecmp(key, "autocommit")==0){ | } else if(strcasecmp(key, "autocommit")==0){ |
| if(connection.without_default_transactions) | |
| services._throw("options WithoutDefaultTransaction and autocommit can't be used together"); | |
| if(atoi(value)==0) | if(atoi(value)==0) |
| connection.autocommit=false; | connection.autocommit=false; |
| } else if(strcmp(key, "WithoutDefaultTransaction")==0){ | |
| if(!connection.autocommit) | |
| services._throw("options WithoutDefaultTransaction and autocommit can't be used together"); | |
| if(atoi(value)==1){ | |
| connection.without_default_transactions=true; | |
| connection.autocommit=false; | |
| } | |
| } else if(strcasecmp(key, "standard_conforming_strings")==0){ | } else if(strcasecmp(key, "standard_conforming_strings")==0){ |
| if(atoi(value)==0) | if(atoi(value)==0) |
| connection.standard_conforming_strings=false; | connection.standard_conforming_strings=false; |
| Line 205 public: | Line 180 public: |
| } | } |
| } | } |
| connection.conn=PQsetdbLogin( (host && strcasecmp(host, "local") == 0) ? NULL /* local Unix domain socket */ : host, port, NULL, NULL, db, user, pwd); | |
| if(!connection.conn) | |
| services._throw("PQsetdbLogin failed"); | |
| if(PQstatus(connection.conn)!=CONNECTION_OK) | |
| throwPQerror; | |
| if(charset){ | if(charset){ |
| char statement[MAX_STRING+1]="SET CLIENT_ENCODING="; | char statement[MAX_STRING+1]="SET CLIENT_ENCODING="; |
| strncat(statement, charset, MAX_STRING); | strncat(statement, charset, MAX_STRING); |
| Line 219 public: | Line 202 public: |
| _execute_cmd(connection, statement); | _execute_cmd(connection, statement); |
| } | } |
| _transaction_begin(connection); | if(!connection.autocommit) |
| _execute_cmd(connection, "set AUTOCOMMIT off"); | |
| } | } |
| void disconnect(void *aconnection){ | void disconnect(void *aconnection){ |
| Line 230 public: | Line 214 public: |
| void commit(void *aconnection){ | void commit(void *aconnection){ |
| Connection& connection=*static_cast<Connection*>(aconnection); | Connection& connection=*static_cast<Connection*>(aconnection); |
| _transaction_commit(connection); | if(!connection.autocommit) |
| _transaction_begin(connection); | _execute_cmd(connection, "COMMIT"); |
| } | } |
| void rollback(void *aconnection){ | void rollback(void *aconnection){ |
| Connection& connection=*static_cast<Connection*>(aconnection); | Connection& connection=*static_cast<Connection*>(aconnection); |
| _transaction_rollback(connection); | if(!connection.autocommit) |
| _transaction_begin(connection); | _execute_cmd(connection, "ROLLBACK"); |
| } | } |
| bool ping(void *aconnection) { | bool ping(void *aconnection) { |
| Line 247 public: | Line 231 public: |
| // charset here is services.request_charset(), not connection.client_charset | // charset here is services.request_charset(), not connection.client_charset |
| // thus we can't use the sql server quoting support | // thus we can't use the sql server quoting support |
| const char* quote(void *aconnection, const char *str, unsigned int length) | const char* quote(void *aconnection, const char *str, unsigned int length){ |
| { | |
| Connection& connection=*static_cast<Connection*>(aconnection); | Connection& connection=*static_cast<Connection*>(aconnection); |
| const char* from; | const char* from; |
| Line 301 public: | Line 284 public: |
| return result; | return result; |
| } | } |
| void query(void *aconnection, | void query(void *aconnection, const char *astatement, size_t placeholders_count, Placeholder* placeholders, unsigned long offset, unsigned long limit, SQL_Driver_query_event_handlers& handlers ){ |
| const char *astatement, | |
| size_t placeholders_count, Placeholder* placeholders, | |
| unsigned long offset, unsigned long limit, | |
| SQL_Driver_query_event_handlers& handlers | |
| ){ | |
| Connection& connection=*static_cast<Connection*>(aconnection); | Connection& connection=*static_cast<Connection*>(aconnection); |
| SQL_Driver_services& services=*connection.services; | SQL_Driver_services& services=*connection.services; |
| PGconn *conn=connection.conn; | PGconn *conn=connection.conn; |
| Line 326 public: | Line 304 public: |
| if(transcode_needed){ | if(transcode_needed){ |
| // transcode query from $request:charset to ?ClientCharset | // transcode query from $request:charset to ?ClientCharset |
| statement_size=strlen(astatement); | statement_size=strlen(astatement); |
| services.transcode(astatement, statement_size, | services.transcode(astatement, statement_size, astatement, statement_size, request_charset, client_charset); |
| astatement, statement_size, | |
| request_charset, | |
| client_charset); | |
| } | } |
| const char *statement=_preprocess_statement(connection, astatement, statement_size, offset, limit); | const char *statement=_preprocess_statement(connection, astatement, statement_size, offset, limit); |
| Line 348 public: | Line 323 public: |
| SQL_Error sql_error; | SQL_Error sql_error; |
| switch(PQresultStatus(res)) { | switch(PQresultStatus(res)) { |
| case PGRES_EMPTY_QUERY: | case PGRES_EMPTY_QUERY: |
| PQclear_throw("no query"); | PQclear_throw("no query"); |
| break; | break; |
| case PGRES_COMMAND_OK: // empty result: insert|delete|update|... | case PGRES_COMMAND_OK: // empty result: insert|delete|update|... |
| PQclear(res); | PQclear(res); |
| if(connection.autocommit) | |
| commit(aconnection); | |
| return; | return; |
| case PGRES_TUPLES_OK: | case PGRES_TUPLES_OK: |
| break; | break; |
| default: | default: |
| PQclear_throwPQerror; | PQclear_throwPQerror; |
| break; | break; |
| Line 387 public: | Line 360 public: |
| if(transcode_needed) | if(transcode_needed) |
| // transcode column name from ?ClientCharset to $request:charset | // transcode column name from ?ClientCharset to $request:charset |
| services.transcode(str, length, | services.transcode(str, length, str, length, client_charset, request_charset); |
| str, length, | |
| client_charset, | |
| request_charset); | |
| CHECK(handlers.add_column(sql_error, str, length)); | CHECK(handlers.add_column(sql_error, str, length)); |
| } | } |
| Line 481 cleanup: | Line 451 cleanup: |
| PQclear(res); | PQclear(res); |
| if(failed) | if(failed) |
| services._throw(sql_error); | services._throw(sql_error); |
| if(connection.autocommit) | |
| commit(aconnection); | |
| } | } |
| private: | private: |
| void _bind_parameters( | void _bind_parameters( size_t placeholders_count, Placeholder* placeholders, const char** paramValues, Connection& connection, bool transcode_needed){ |
| size_t placeholders_count, | |
| Placeholder* placeholders, | |
| const char** paramValues, | |
| Connection& connection, | |
| bool transcode_needed | |
| ){ | |
| for(size_t i=0; i<placeholders_count; i++){ | for(size_t i=0; i<placeholders_count; i++){ |
| Placeholder& ph=placeholders[i]; | Placeholder& ph=placeholders[i]; |
| if(transcode_needed){ | if(transcode_needed){ |
| size_t name_length; | size_t name_length; |
| connection.services->transcode(ph.name, strlen(ph.name), | connection.services->transcode(ph.name, strlen(ph.name), ph.name, name_length, connection.services->request_charset(), connection.client_charset); |
| ph.name, name_length, | |
| connection.services->request_charset(), | |
| connection.client_charset); | |
| if(ph.value) { | if(ph.value) { |
| size_t value_length; | size_t value_length; |
| connection.services->transcode(ph.value, strlen(ph.value), | connection.services->transcode(ph.value, strlen(ph.value), ph.value, value_length, connection.services->request_charset(), connection.client_charset); |
| ph.value, value_length, | |
| connection.services->request_charset(), | |
| connection.client_charset); | |
| } | } |
| } | } |
| int name_number=atoi(ph.name); | int name_number=atoi(ph.name); |
| Line 519 private: | Line 474 private: |
| } | } |
| } | } |
| void _transaction_begin(Connection& connection){ | |
| _execute_transactions_cmd(connection, "BEGIN"); | |
| } | |
| void _transaction_commit(Connection& connection){ | |
| _execute_transactions_cmd(connection, "COMMIT"); | |
| } | |
| void _transaction_rollback(Connection& connection){ | |
| _execute_transactions_cmd(connection, "ROLLBACK"); | |
| } | |
| void _execute_transactions_cmd(const Connection& connection, const char *query){ | |
| if(!connection.without_default_transactions) // with option ?WithoutDefaultTransaction=1 user must execute BEGIN/COMMIT/ROLLBACK by himself | |
| _execute_cmd(connection, query); | |
| } | |
| // executes a query and throw away the result. | // executes a query and throw away the result. |
| void _execute_cmd(const Connection& connection, const char *query){ | void _execute_cmd(const Connection& connection, const char *query){ |
| if(PGresult *res=PQexec(connection.conn, query)) | if(PGresult *res=PQexec(connection.conn, query)) |
| Line 545 private: | Line 482 private: |
| throwPQerror; | throwPQerror; |
| } | } |
| const char *_preprocess_statement( | const char *_preprocess_statement(Connection& connection, const char *astatement, size_t statement_size, unsigned long offset, unsigned long limit){ |
| Connection& connection, | |
| const char *astatement, | |
| size_t statement_size, | |
| unsigned long offset, | |
| unsigned long limit | |
| ){ | |
| PGconn *conn=connection.conn; | PGconn *conn=connection.conn; |
| if(!statement_size) | if(!statement_size) |
| Line 584 private: | Line 515 private: |
| const char* saved_o=o; | const char* saved_o=o; |
| o+=3; | o+=3; |
| while(*o) | while(*o) |
| if( | if(o[0]=='*' && o[1]=='*' && o[2]=='/' && o[3]=='\'') { // name end |
| o[0]=='*' && | |
| o[1]=='*' && | |
| o[2]=='/' && | |
| o[3]=='\'') { // name end | |
| saved_o=0; // found, marking that | 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); |
| Line 746 private: // conn client library funcs li | Line 673 private: // conn client library funcs li |
| DLINK(PQexecParams); | DLINK(PQexecParams); |
| DLINK(PQftype); | DLINK(PQftype); |
| DLINK(PQescapeStringConn); | DLINK(PQescapeStringConn); |
| DLINK(lo_open); DLINK(lo_close); | DLINK(lo_open); DLINK(lo_close); |
| DLINK(lo_read); DLINK(lo_write); | DLINK(lo_read); DLINK(lo_write); |
| DLINK(lo_lseek); DLINK(lo_creat); | DLINK(lo_lseek); DLINK(lo_creat); |
| DLINK(lo_tell); DLINK(lo_unlink); | DLINK(lo_tell); DLINK(lo_unlink); |
| DLINK(lo_import); DLINK(lo_export); | DLINK(lo_import); DLINK(lo_export); |
| return 0; | return 0; |
| } | } |