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pdo_dbh.cpp
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//---------------------------------------------------------------------------------------------------------------------------------
// file: pdo_dbh.cpp
//
// Contents: Implements the PDO object for PDO_SQLSRV
//
// Microsoft Drivers 5.11 for PHP for SQL Server
// Copyright(c) Microsoft Corporation
// All rights reserved.
// MIT License
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files(the ""Software""),
// to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and / or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions :
// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED *AS IS*, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
//---------------------------------------------------------------------------------------------------------------------------------
extern "C" {
#include "php_pdo_sqlsrv.h"
}
#include "php_pdo_sqlsrv_int.h"
#include <string>
#include <sstream>
typedef const zend_function_entry pdo_sqlsrv_function_entry;
// *** internal variables and constants ***
namespace {
const char LAST_INSERT_ID_QUERY[] = "SELECT @@IDENTITY;";
const size_t LAST_INSERT_ID_BUFF_LEN = 50; // size of the buffer to hold the string value of the last inserted id, which may be an int, bigint, decimal(p,0) or numeric(p,0)
const char SEQUENCE_CURRENT_VALUE_QUERY[] = "SELECT current_value FROM sys.sequences WHERE name=N'%s'";
const int LAST_INSERT_ID_QUERY_MAX_LEN = sizeof( SEQUENCE_CURRENT_VALUE_QUERY ) + SQL_MAX_SQLSERVERNAME + 2; // include the quotes
// List of PDO supported connection options.
namespace PDOConnOptionNames {
const char Server[] = "Server";
const char APP[] = "APP";
const char AccessToken[] = "AccessToken";
const char ApplicationIntent[] = "ApplicationIntent";
const char AttachDBFileName[] = "AttachDbFileName";
const char Authentication[] = "Authentication";
const char ColumnEncryption[] = "ColumnEncryption";
const char ConnectionPooling[] = "ConnectionPooling";
const char Language[] = "Language";
const char ConnectRetryCount[] = "ConnectRetryCount";
const char ConnectRetryInterval[] = "ConnectRetryInterval";
const char Database[] = "Database";
const char Driver[] = "Driver";
const char Encrypt[] = "Encrypt";
const char Failover_Partner[] = "Failover_Partner";
const char KeyStoreAuthentication[] = "KeyStoreAuthentication";
const char KeyStorePrincipalId[] = "KeyStorePrincipalId";
const char KeyStoreSecret[] = "KeyStoreSecret";
const char LoginTimeout[] = "LoginTimeout";
const char MARS_Option[] = "MultipleActiveResultSets";
const char MultiSubnetFailover[] = "MultiSubnetFailover";
const char QuotedId[] = "QuotedId";
const char TraceFile[] = "TraceFile";
const char TraceOn[] = "TraceOn";
const char TrustServerCertificate[] = "TrustServerCertificate";
const char TransactionIsolation[] = "TransactionIsolation";
const char TransparentNetworkIPResolution[] = "TransparentNetworkIPResolution";
const char WSID[] = "WSID";
const char ComputePool[] = "ComputePool";
const char HostNameInCertificate[] = "HostNameInCertificate";
}
enum PDO_CONN_OPTIONS {
PDO_CONN_OPTION_SERVER = SQLSRV_CONN_OPTION_DRIVER_SPECIFIC,
};
enum PDO_STMT_OPTIONS {
PDO_STMT_OPTION_ENCODING = SQLSRV_STMT_OPTION_DRIVER_SPECIFIC,
PDO_STMT_OPTION_DIRECT_QUERY,
PDO_STMT_OPTION_CURSOR_SCROLL_TYPE,
PDO_STMT_OPTION_CLIENT_BUFFER_MAX_KB_SIZE,
PDO_STMT_OPTION_EMULATE_PREPARES,
PDO_STMT_OPTION_FETCHES_NUMERIC_TYPE,
PDO_STMT_OPTION_FETCHES_DATETIME_TYPE,
PDO_STMT_OPTION_FORMAT_DECIMALS,
PDO_STMT_OPTION_DECIMAL_PLACES,
PDO_STMT_OPTION_DATA_CLASSIFICATION
};
// List of all the statement options supported by this driver.
const stmt_option PDO_STMT_OPTS[] = {
{ NULL, 0, SQLSRV_STMT_OPTION_QUERY_TIMEOUT, std::unique_ptr<stmt_option_query_timeout>( new stmt_option_query_timeout ) },
{ NULL, 0, SQLSRV_STMT_OPTION_SCROLLABLE, std::unique_ptr<stmt_option_pdo_scrollable>( new stmt_option_pdo_scrollable ) },
{ NULL, 0, PDO_STMT_OPTION_ENCODING, std::unique_ptr<stmt_option_encoding>( new stmt_option_encoding ) },
{ NULL, 0, PDO_STMT_OPTION_DIRECT_QUERY, std::unique_ptr<stmt_option_direct_query>( new stmt_option_direct_query ) },
{ NULL, 0, PDO_STMT_OPTION_CURSOR_SCROLL_TYPE, std::unique_ptr<stmt_option_cursor_scroll_type>( new stmt_option_cursor_scroll_type ) },
{ NULL, 0, PDO_STMT_OPTION_CLIENT_BUFFER_MAX_KB_SIZE, std::unique_ptr<stmt_option_buffered_query_limit>( new stmt_option_buffered_query_limit ) },
{ NULL, 0, PDO_STMT_OPTION_EMULATE_PREPARES, std::unique_ptr<stmt_option_emulate_prepares>( new stmt_option_emulate_prepares ) },
{ NULL, 0, PDO_STMT_OPTION_FETCHES_NUMERIC_TYPE, std::unique_ptr<stmt_option_fetch_numeric>( new stmt_option_fetch_numeric ) },
{ NULL, 0, PDO_STMT_OPTION_FETCHES_DATETIME_TYPE, std::unique_ptr<stmt_option_fetch_datetime>( new stmt_option_fetch_datetime ) },
{ NULL, 0, PDO_STMT_OPTION_FORMAT_DECIMALS, std::unique_ptr<stmt_option_format_decimals>( new stmt_option_format_decimals ) },
{ NULL, 0, PDO_STMT_OPTION_DECIMAL_PLACES, std::unique_ptr<stmt_option_decimal_places>( new stmt_option_decimal_places ) },
{ NULL, 0, PDO_STMT_OPTION_DATA_CLASSIFICATION, std::unique_ptr<stmt_option_data_classification>( new stmt_option_data_classification ) },
{ NULL, 0, SQLSRV_STMT_OPTION_INVALID, std::unique_ptr<stmt_option_functor>{} },
};
// boolean connection string
struct pdo_bool_conn_str_func
{
static void func( _In_ connection_option const* option, _Inout_ zval* value, sqlsrv_conn* /*conn*/, _Out_ std::string& conn_str );
};
struct pdo_txn_isolation_conn_attr_func
{
static void func( connection_option const* /*option*/, _In_ zval* value_z, _Inout_ sqlsrv_conn* conn, std::string& /*conn_str*/ );
};
struct pdo_int_conn_str_func {
static void func( _In_ connection_option const* option, _In_ zval* value, sqlsrv_conn* /*conn*/, _Out_ std::string& conn_str )
{
SQLSRV_ASSERT(Z_TYPE_P(value) == IS_STRING, "Wrong zval type for this keyword");
std::string val_str = Z_STRVAL_P( value );
conn_str += option->odbc_name;
conn_str += "={";
conn_str += val_str;
conn_str += "};";
}
};
struct pdo_encrypt_set_func
{
static void func(_In_ connection_option const* option, _Inout_ zval* value_z, sqlsrv_conn* /*conn*/, _Out_ std::string& conn_str)
{
SQLSRV_ASSERT(Z_TYPE_P(value_z) == IS_STRING, "Wrong zval type for this keyword");
std::string val_str = Z_STRVAL_P(value_z);
std::string whitespaces(" \t\f\v\n\r");
// Trim white spaces
std::size_t found = val_str.find_last_not_of(whitespaces);
if (found != std::string::npos)
val_str.erase(found + 1);
const char TRUE_VALUE_1[] = "true";
const char TRUE_VALUE_2[] = "1";
const char FALSE_VALUE_1[] = "false";
const char FALSE_VALUE_2[] = "0";
// For backward compatibility, convert true/1 to yes and false/0 to no
std::string attr;
if (!val_str.compare(TRUE_VALUE_1) || !val_str.compare(TRUE_VALUE_2)) {
attr = "yes";
} else if (!val_str.compare(FALSE_VALUE_1) || !val_str.compare(FALSE_VALUE_2)) {
attr = "no";
} else {
// simply pass the attribute value to ODBC driver
attr = val_str;
}
conn_str += option->odbc_name;
conn_str += "={";
conn_str += attr;
conn_str += "};";
}
};
template <unsigned int Attr>
struct pdo_int_conn_attr_func {
static void func( connection_option const* /*option*/, _In_ zval* value, _Inout_ sqlsrv_conn* conn, std::string& /*conn_str*/ )
{
try {
SQLSRV_ASSERT( Z_TYPE_P( value ) == IS_STRING, "pdo_int_conn_attr_func: Unexpected zval type." );
size_t val = static_cast<size_t>( atoi( Z_STRVAL_P( value )) );
core::SQLSetConnectAttr( conn, Attr, reinterpret_cast<SQLPOINTER>( val ), SQL_IS_UINTEGER );
}
catch( core::CoreException& ) {
throw;
}
}
};
template <unsigned int Attr>
struct pdo_bool_conn_attr_func {
static void func( connection_option const* /*option*/, _Inout_ zval* value, _Inout_ sqlsrv_conn* conn, std::string& /*conn_str*/ )
{
try {
core::SQLSetConnectAttr( conn, Attr, reinterpret_cast<SQLPOINTER>( core_str_zval_is_true( value )),
SQL_IS_UINTEGER );
}
catch( core::CoreException& ) {
throw;
}
}
};
// statement options related functions
void add_stmt_option_key( _Inout_ sqlsrv_context& ctx, _In_ size_t key, _Inout_ HashTable* options_ht,
_Inout_ zval** data );
void validate_stmt_options( _Inout_ sqlsrv_context& ctx, _Inout_ zval* stmt_options, _Inout_ HashTable* pdo_stmt_options_ht );
} // namespace
// List of all connection options supported by this driver.
const connection_option PDO_CONN_OPTS[] = {
{
PDOConnOptionNames::Server,
sizeof( PDOConnOptionNames::Server ),
PDO_CONN_OPTION_SERVER,
NULL,
0,
CONN_ATTR_STRING,
conn_str_append_func::func
},
{
PDOConnOptionNames::APP,
sizeof( PDOConnOptionNames::APP ),
SQLSRV_CONN_OPTION_APP,
ODBCConnOptions::APP,
sizeof( ODBCConnOptions::APP ),
CONN_ATTR_STRING,
conn_str_append_func::func
},
{
PDOConnOptionNames::AccessToken,
sizeof( PDOConnOptionNames::AccessToken ),
SQLSRV_CONN_OPTION_ACCESS_TOKEN,
ODBCConnOptions::AccessToken,
sizeof( ODBCConnOptions::AccessToken),
CONN_ATTR_STRING,
access_token_set_func::func
},
{
PDOConnOptionNames::ApplicationIntent,
sizeof( PDOConnOptionNames::ApplicationIntent ),
SQLSRV_CONN_OPTION_APPLICATION_INTENT,
ODBCConnOptions::ApplicationIntent,
sizeof( ODBCConnOptions::ApplicationIntent ),
CONN_ATTR_STRING,
conn_str_append_func::func
},
{
PDOConnOptionNames::AttachDBFileName,
sizeof( PDOConnOptionNames::AttachDBFileName ),
SQLSRV_CONN_OPTION_ATTACHDBFILENAME,
ODBCConnOptions::AttachDBFileName,
sizeof( ODBCConnOptions::AttachDBFileName ),
CONN_ATTR_STRING,
conn_str_append_func::func
},
{
PDOConnOptionNames::Authentication,
sizeof( PDOConnOptionNames::Authentication ),
SQLSRV_CONN_OPTION_AUTHENTICATION,
ODBCConnOptions::Authentication,
sizeof( ODBCConnOptions::Authentication ),
CONN_ATTR_STRING,
conn_str_append_func::func
},
{
PDOConnOptionNames::ConnectionPooling,
sizeof( PDOConnOptionNames::ConnectionPooling ),
SQLSRV_CONN_OPTION_CONN_POOLING,
ODBCConnOptions::ConnectionPooling,
sizeof( ODBCConnOptions::ConnectionPooling ),
CONN_ATTR_BOOL,
conn_null_func::func
},
{
PDOConnOptionNames::Language,
sizeof( PDOConnOptionNames::Language ),
SQLSRV_CONN_OPTION_LANGUAGE,
ODBCConnOptions::Language,
sizeof( ODBCConnOptions::Language ),
CONN_ATTR_STRING,
conn_str_append_func::func
},
{
PDOConnOptionNames::Driver,
sizeof(PDOConnOptionNames::Driver),
SQLSRV_CONN_OPTION_DRIVER,
ODBCConnOptions::Driver,
sizeof(ODBCConnOptions::Driver),
CONN_ATTR_STRING,
driver_set_func::func
},
{
PDOConnOptionNames::ColumnEncryption,
sizeof(PDOConnOptionNames::ColumnEncryption),
SQLSRV_CONN_OPTION_COLUMNENCRYPTION,
ODBCConnOptions::ColumnEncryption,
sizeof(ODBCConnOptions::ColumnEncryption),
CONN_ATTR_STRING,
column_encryption_set_func::func
},
{
PDOConnOptionNames::ConnectRetryCount,
sizeof( PDOConnOptionNames::ConnectRetryCount ),
SQLSRV_CONN_OPTION_CONN_RETRY_COUNT,
ODBCConnOptions::ConnectRetryCount,
sizeof( ODBCConnOptions::ConnectRetryCount ),
CONN_ATTR_INT,
pdo_int_conn_str_func::func
},
{
PDOConnOptionNames::ConnectRetryInterval,
sizeof( PDOConnOptionNames::ConnectRetryInterval ),
SQLSRV_CONN_OPTION_CONN_RETRY_INTERVAL,
ODBCConnOptions::ConnectRetryInterval,
sizeof( ODBCConnOptions::ConnectRetryInterval ),
CONN_ATTR_INT,
pdo_int_conn_str_func::func
},
{
PDOConnOptionNames::Database,
sizeof( PDOConnOptionNames::Database ),
SQLSRV_CONN_OPTION_DATABASE,
ODBCConnOptions::Database,
sizeof( ODBCConnOptions::Database ),
CONN_ATTR_STRING,
conn_str_append_func::func
},
{
PDOConnOptionNames::Encrypt,
sizeof( PDOConnOptionNames::Encrypt ),
SQLSRV_CONN_OPTION_ENCRYPT,
ODBCConnOptions::Encrypt,
sizeof( ODBCConnOptions::Encrypt ),
CONN_ATTR_MIXED,
pdo_encrypt_set_func::func
},
{
PDOConnOptionNames::Failover_Partner,
sizeof( PDOConnOptionNames::Failover_Partner ),
SQLSRV_CONN_OPTION_FAILOVER_PARTNER,
ODBCConnOptions::Failover_Partner,
sizeof( ODBCConnOptions::Failover_Partner ),
CONN_ATTR_STRING,
conn_str_append_func::func
},
{
PDOConnOptionNames::KeyStoreAuthentication,
sizeof( PDOConnOptionNames::KeyStoreAuthentication ),
SQLSRV_CONN_OPTION_KEYSTORE_AUTHENTICATION,
ODBCConnOptions::KeyStoreAuthentication,
sizeof( ODBCConnOptions::KeyStoreAuthentication ),
CONN_ATTR_STRING,
ce_akv_str_set_func::func
},
{
PDOConnOptionNames::KeyStorePrincipalId,
sizeof( PDOConnOptionNames::KeyStorePrincipalId ),
SQLSRV_CONN_OPTION_KEYSTORE_PRINCIPAL_ID,
ODBCConnOptions::KeyStorePrincipalId,
sizeof( ODBCConnOptions::KeyStorePrincipalId ),
CONN_ATTR_STRING,
ce_akv_str_set_func::func
},
{
PDOConnOptionNames::KeyStoreSecret,
sizeof( PDOConnOptionNames::KeyStoreSecret ),
SQLSRV_CONN_OPTION_KEYSTORE_SECRET,
ODBCConnOptions::KeyStoreSecret,
sizeof( ODBCConnOptions::KeyStoreSecret ),
CONN_ATTR_STRING,
ce_akv_str_set_func::func
},
{
PDOConnOptionNames::LoginTimeout,
sizeof( PDOConnOptionNames::LoginTimeout ),
SQLSRV_CONN_OPTION_LOGIN_TIMEOUT,
ODBCConnOptions::LoginTimeout,
sizeof( ODBCConnOptions::LoginTimeout ),
CONN_ATTR_INT,
pdo_int_conn_attr_func<SQL_ATTR_LOGIN_TIMEOUT>::func
},
{
PDOConnOptionNames::MARS_Option,
sizeof( PDOConnOptionNames::MARS_Option ),
SQLSRV_CONN_OPTION_MARS,
ODBCConnOptions::MARS_ODBC,
sizeof( ODBCConnOptions::MARS_ODBC ),
CONN_ATTR_BOOL,
pdo_bool_conn_str_func::func
},
{
PDOConnOptionNames::MultiSubnetFailover,
sizeof( PDOConnOptionNames::MultiSubnetFailover ),
SQLSRV_CONN_OPTION_MULTI_SUBNET_FAILOVER,
ODBCConnOptions::MultiSubnetFailover,
sizeof( ODBCConnOptions::MultiSubnetFailover ),
CONN_ATTR_BOOL,
pdo_bool_conn_str_func::func
},
{
PDOConnOptionNames::QuotedId,
sizeof( PDOConnOptionNames::QuotedId ),
SQLSRV_CONN_OPTION_QUOTED_ID,
ODBCConnOptions::QuotedId,
sizeof( ODBCConnOptions::QuotedId ),
CONN_ATTR_BOOL,
pdo_bool_conn_str_func::func
},
{
PDOConnOptionNames::TraceFile,
sizeof( PDOConnOptionNames::TraceFile ),
SQLSRV_CONN_OPTION_TRACE_FILE,
ODBCConnOptions::TraceFile,
sizeof( ODBCConnOptions::TraceFile ),
CONN_ATTR_STRING,
str_conn_attr_func<SQL_ATTR_TRACEFILE>::func
},
{
PDOConnOptionNames::TraceOn,
sizeof( PDOConnOptionNames::TraceOn ),
SQLSRV_CONN_OPTION_TRACE_ON,
ODBCConnOptions::TraceOn,
sizeof( ODBCConnOptions::TraceOn ),
CONN_ATTR_BOOL,
pdo_bool_conn_attr_func<SQL_ATTR_TRACE>::func
},
{
PDOConnOptionNames::TransactionIsolation,
sizeof( PDOConnOptionNames::TransactionIsolation ),
SQLSRV_CONN_OPTION_TRANS_ISOLATION,
ODBCConnOptions::TransactionIsolation,
sizeof( ODBCConnOptions::TransactionIsolation ),
CONN_ATTR_INT,
pdo_txn_isolation_conn_attr_func::func
},
{
PDOConnOptionNames::TrustServerCertificate,
sizeof( PDOConnOptionNames::TrustServerCertificate ),
SQLSRV_CONN_OPTION_TRUST_SERVER_CERT,
ODBCConnOptions::TrustServerCertificate,
sizeof( ODBCConnOptions::TrustServerCertificate ),
CONN_ATTR_BOOL,
pdo_bool_conn_str_func::func
},
{
PDOConnOptionNames::TransparentNetworkIPResolution,
sizeof(PDOConnOptionNames::TransparentNetworkIPResolution),
SQLSRV_CONN_OPTION_TRANSPARENT_NETWORK_IP_RESOLUTION,
ODBCConnOptions::TransparentNetworkIPResolution,
sizeof(ODBCConnOptions::TransparentNetworkIPResolution),
CONN_ATTR_STRING,
conn_str_append_func::func
},
{
PDOConnOptionNames::WSID,
sizeof( PDOConnOptionNames::WSID ),
SQLSRV_CONN_OPTION_WSID,
ODBCConnOptions::WSID,
sizeof( ODBCConnOptions::WSID ),
CONN_ATTR_STRING,
conn_str_append_func::func
},
{
PDOConnOptionNames::ComputePool,
sizeof(PDOConnOptionNames::ComputePool),
SQLSRV_CONN_OPTION_COMPUTE_POOL,
ODBCConnOptions::ComputePool,
sizeof(ODBCConnOptions::ComputePool),
CONN_ATTR_STRING,
conn_str_append_func::func
},
{
PDOConnOptionNames::HostNameInCertificate,
sizeof(PDOConnOptionNames::HostNameInCertificate),
SQLSRV_CONN_OPTION_HOSTNAME_IN_CERT,
ODBCConnOptions::HostNameInCertificate,
sizeof(ODBCConnOptions::HostNameInCertificate),
CONN_ATTR_STRING,
conn_str_append_func::func
},
{ NULL, 0, SQLSRV_CONN_OPTION_INVALID, NULL, 0 , CONN_ATTR_INVALID, NULL }, //terminate the table
};
#if PHP_VERSION_ID < 80100
// close the connection
int pdo_sqlsrv_dbh_close(_Inout_ pdo_dbh_t *dbh);
// execute queries
int pdo_sqlsrv_dbh_prepare(_Inout_ pdo_dbh_t *dbh, _In_reads_(sql_len) const char *sql,
_Inout_ size_t sql_len, _Inout_ pdo_stmt_t *stmt, _In_ zval *driver_options);
zend_long pdo_sqlsrv_dbh_do(_Inout_ pdo_dbh_t *dbh, _In_reads_bytes_(sql_len) const char *sql, _In_ size_t sql_len);
// quote a string, meaning put quotes around it and escape any quotes within it
int pdo_sqlsrv_dbh_quote(_Inout_ pdo_dbh_t* dbh, _In_reads_(unquotedlen) const char* unquoted, _In_ size_t unquotedlen, _Outptr_result_buffer_(*quotedlen) char **quoted, _Out_ size_t* quotedlen,
enum pdo_param_type paramtype);
// transaction support functions
int pdo_sqlsrv_dbh_commit(_Inout_ pdo_dbh_t *dbh);
int pdo_sqlsrv_dbh_begin(_Inout_ pdo_dbh_t *dbh);
int pdo_sqlsrv_dbh_rollback(_Inout_ pdo_dbh_t *dbh);
// attribute functions
int pdo_sqlsrv_dbh_set_attr(_Inout_ pdo_dbh_t *dbh, _In_ zend_long attr, _Inout_ zval *val);
int pdo_sqlsrv_dbh_get_attr(_Inout_ pdo_dbh_t *dbh, _In_ zend_long attr, _Inout_ zval *return_value);
// return the last id generated by an executed SQL statement
char * pdo_sqlsrv_dbh_last_id(_Inout_ pdo_dbh_t *dbh, _In_z_ const char *name, _Out_ size_t* len);
// return more information
int pdo_sqlsrv_dbh_return_error(_In_ pdo_dbh_t *dbh, _In_opt_ pdo_stmt_t *stmt, _Out_ zval *info);
#else
// close the connection
void pdo_sqlsrv_dbh_close(_Inout_ pdo_dbh_t *dbh);
// execute queries
bool pdo_sqlsrv_dbh_prepare(_Inout_ pdo_dbh_t *dbh, _In_ zend_string *sql,
_Inout_ pdo_stmt_t *stmt, _In_ zval *driver_options);
zend_long pdo_sqlsrv_dbh_do(_Inout_ pdo_dbh_t *dbh, _In_ const zend_string *sql);
// quote a string, meaning put quotes around it and escape any quotes within it
zend_string* pdo_sqlsrv_dbh_quote(_Inout_ pdo_dbh_t* dbh, _In_ const zend_string *unquoted, _In_ enum pdo_param_type paramtype);
// transaction support functions
bool pdo_sqlsrv_dbh_commit(_Inout_ pdo_dbh_t *dbh);
bool pdo_sqlsrv_dbh_begin(_Inout_ pdo_dbh_t *dbh);
bool pdo_sqlsrv_dbh_rollback(_Inout_ pdo_dbh_t *dbh);
// attribute functions
bool pdo_sqlsrv_dbh_set_attr(_Inout_ pdo_dbh_t *dbh, _In_ zend_long attr, _Inout_ zval *val);
int pdo_sqlsrv_dbh_get_attr(_Inout_ pdo_dbh_t *dbh, _In_ zend_long attr, _Inout_ zval *return_value);
// return the last id generated by an executed SQL statement
zend_string * pdo_sqlsrv_dbh_last_id(_Inout_ pdo_dbh_t *dbh, _In_ const zend_string *name);
// return more information
void pdo_sqlsrv_dbh_return_error(_In_ pdo_dbh_t *dbh, _In_opt_ pdo_stmt_t *stmt, _Out_ zval *info);
#endif
// additional methods are supported in this function
pdo_sqlsrv_function_entry *pdo_sqlsrv_get_driver_methods( _Inout_ pdo_dbh_t *dbh, int kind );
struct pdo_dbh_methods pdo_sqlsrv_dbh_methods = {
pdo_sqlsrv_dbh_close,
pdo_sqlsrv_dbh_prepare,
pdo_sqlsrv_dbh_do,
pdo_sqlsrv_dbh_quote,
pdo_sqlsrv_dbh_begin,
pdo_sqlsrv_dbh_commit,
pdo_sqlsrv_dbh_rollback,
pdo_sqlsrv_dbh_set_attr,
pdo_sqlsrv_dbh_last_id,
pdo_sqlsrv_dbh_return_error,
pdo_sqlsrv_dbh_get_attr,
NULL, // check liveness not implemented
pdo_sqlsrv_get_driver_methods,
NULL, // request shutdown not implemented
#if PHP_VERSION_ID < 80100
NULL // in transaction not implemented
};
#else
NULL, // in transaction not implemented
NULL // get_gc not implemented
};
#endif
// log a function entry point
#define PDO_LOG_DBH_ENTRY \
{ \
pdo_sqlsrv_dbh* driver_dbh = reinterpret_cast<pdo_sqlsrv_dbh*>( dbh->driver_data ); \
if (driver_dbh != NULL) driver_dbh->set_func(__FUNCTION__); \
core_sqlsrv_register_severity_checker(pdo_severity_check); \
LOG(SEV_NOTICE, "%1!s!: entering", __FUNCTION__); \
}
// constructor for the internal object for connections
pdo_sqlsrv_dbh::pdo_sqlsrv_dbh( _In_ SQLHANDLE h, _In_ error_callback e, _In_ void* driver ) :
sqlsrv_conn( h, e, driver, SQLSRV_ENCODING_UTF8 ),
stmts( NULL ),
direct_query( false ),
query_timeout( QUERY_TIMEOUT_INVALID ),
client_buffer_max_size( PDO_SQLSRV_G( client_buffer_max_size )),
fetch_numeric( false ),
fetch_datetime( false ),
format_decimals( false ),
decimal_places( NO_CHANGE_DECIMAL_PLACES ),
use_national_characters(CHARSET_PREFERENCE_NOT_SPECIFIED),
emulate_prepare(false)
{
if( client_buffer_max_size < 0 ) {
client_buffer_max_size = sqlsrv_buffered_result_set::BUFFERED_QUERY_LIMIT_DEFAULT;
LOG( SEV_WARNING, INI_PDO_SQLSRV_CLIENT_BUFFER_MAX_SIZE " set to a invalid value. Resetting to default value." );
}
}
// pdo_sqlsrv_db_handle_factory
// Maps to PDO::__construct.
// Factory method called by the PDO driver manager to create a SQLSRV PDO connection.
// Does the following things:
// 1.Sets the error handling temporarily to PDO_ERRMODE_EXCEPTION.
// (If an error occurs in this function, the PDO specification mandates that
// an exception be thrown, regardless of the error mode setting.)
// 2. Processes the driver options.
// 3. Creates a core_conn object by calling core_sqlsrv_connect.
// 4. Restores the previous error mode on success.
// alloc_own_columns is set to 1 to tell the PDO driver manager that we manage memory
// Parameters:
// dbh - The PDO managed structure for the connection.
// driver_options - A HashTable (within the zval) of options to use when creating the connection.
// Return:
// 0 for failure, 1 for success.
int pdo_sqlsrv_db_handle_factory( _Inout_ pdo_dbh_t *dbh, _In_opt_ zval *driver_options)
{
PDO_LOG_DBH_ENTRY;
hash_auto_ptr pdo_conn_options_ht;
pdo_error_mode prev_err_mode = dbh->error_mode;
// must be done in all cases so that even a failed connection can query the
// object for errors.
dbh->methods = &pdo_sqlsrv_dbh_methods;
dbh->driver_data = NULL;
zval* temp_server_z = NULL;
sqlsrv_malloc_auto_ptr<conn_string_parser> dsn_parser;
zval server_z;
ZVAL_UNDEF( &server_z );
try {
// no matter what the error mode, we want exceptions thrown if the connection fails
// to happen (per the PDO spec)
dbh->error_mode = PDO_ERRMODE_EXCEPTION;
g_pdo_henv_cp->set_driver( dbh );
g_pdo_henv_ncp->set_driver( dbh );
CHECK_CUSTOM_ERROR( driver_options && Z_TYPE_P( driver_options ) != IS_ARRAY, *g_pdo_henv_cp, SQLSRV_ERROR_CONN_OPTS_WRONG_TYPE ) {
throw core::CoreException();
}
// throws PDOException if the ATTR_PERSISTENT is in connection options
CHECK_CUSTOM_ERROR( dbh->is_persistent, *g_pdo_henv_cp, PDO_SQLSRV_ERROR_UNSUPPORTED_DBH_ATTR ) {
dbh->refcount--;
throw pdo::PDOException();
}
// Initialize the options array to be passed to the core layer
ALLOC_HASHTABLE( pdo_conn_options_ht );
core::sqlsrv_zend_hash_init( *g_pdo_henv_cp, pdo_conn_options_ht, 10 /* # of buckets */,
ZVAL_PTR_DTOR, 0 /*persistent*/ );
// Either of g_pdo_henv_cp or g_pdo_henv_ncp can be used to propogate the error.
dsn_parser = new ( sqlsrv_malloc( sizeof( conn_string_parser ))) conn_string_parser( *g_pdo_henv_cp, dbh->data_source,
static_cast<int>( dbh->data_source_len ), pdo_conn_options_ht );
dsn_parser->parse_conn_string();
// Extract the server name
temp_server_z = zend_hash_index_find( pdo_conn_options_ht, PDO_CONN_OPTION_SERVER );
CHECK_CUSTOM_ERROR(( temp_server_z == NULL ), g_pdo_henv_cp, PDO_SQLSRV_ERROR_SERVER_NOT_SPECIFIED ) {
throw pdo::PDOException();
}
server_z = *temp_server_z;
// Add a reference to the option value since we are deleting it from the hashtable
zval_add_ref( &server_z );
zend_hash_index_del( pdo_conn_options_ht, PDO_CONN_OPTION_SERVER );
sqlsrv_conn* conn = core_sqlsrv_connect( *g_pdo_henv_cp, *g_pdo_henv_ncp, core::allocate_conn<pdo_sqlsrv_dbh>, Z_STRVAL( server_z ),
dbh->username, dbh->password, pdo_conn_options_ht, pdo_sqlsrv_handle_dbh_error,
PDO_CONN_OPTS, dbh, "pdo_sqlsrv_db_handle_factory" );
// Free the string in server_z after being used
zend_string_release( Z_STR( server_z ));
SQLSRV_ASSERT( conn != NULL, "Invalid connection returned. Exception should have been thrown." );
// set the driver_data and methods to complete creation of the PDO object
dbh->driver_data = conn;
dbh->error_mode = prev_err_mode; // reset the error mode
dbh->alloc_own_columns = 1; // we do our own memory management for columns
dbh->native_case = PDO_CASE_NATURAL;// SQL Server supports mixed case types
}
catch( core::CoreException& ) {
if ( Z_TYPE( server_z ) == IS_STRING ) {
zend_string_release( Z_STR( server_z ));
}
dbh->error_mode = prev_err_mode; // reset the error mode
g_pdo_henv_cp->last_error().reset(); // reset the last error; callee will check if last_error exist before freeing it and setting it to NULL
return 0;
}
catch( ... ) {
DIE( "pdo_sqlsrv_db_handle_factory: Unknown exception caught" );
}
return 1;
}
// pdo_sqlsrv_dbh_close
// Maps to PDO::__destruct.
// Called when a PDO object is to be destroyed.
// By the time this function is called, PDO has already made sure that
// all statements are disposed and the PDO object is the last item destroyed.
// Parameters:
// dbh - The PDO managed connection object.
// Return:
// Always returns 1 for success. (for PHP_VERSION_ID < 80100)
#if PHP_VERSION_ID < 80100
int pdo_sqlsrv_dbh_close( _Inout_ pdo_dbh_t *dbh )
#else
void pdo_sqlsrv_dbh_close(_Inout_ pdo_dbh_t *dbh)
#endif
{
LOG( SEV_NOTICE, "pdo_sqlsrv_dbh_close: entering" );
// if the connection didn't complete properly, driver_data isn't initialized.
if( dbh->driver_data == NULL ) {
#if PHP_VERSION_ID < 80100
return 1;
#else
return;
#endif
}
PDO_RESET_DBH_ERROR;
// call the core layer close
core_sqlsrv_close( reinterpret_cast<sqlsrv_conn*>( dbh->driver_data ) );
dbh->driver_data = NULL;
#if PHP_VERSION_ID < 80100
// always return success that the connection is closed
return 1;
#endif
}
// pdo_sqlsrv_dbh_prepare
// Called by PDO::prepare and PDOStatement::__construct.
// Creates a statement and prepares it for execution by PDO
// Paramters:
// dbh - The PDO managed connection object.
// sql - SQL query to be prepared.
// sql_len - Length of the sql query
// stmt - The PDO managed statement object.
// driver_options - User provided list of statement options.
// Return:
// 0 for failure, 1 for success.
#if PHP_VERSION_ID < 80100
int pdo_sqlsrv_dbh_prepare(_Inout_ pdo_dbh_t *dbh, _In_reads_(sql_len) const char *sql,
_Inout_ size_t sql_len, _Inout_ pdo_stmt_t *stmt, _In_ zval *driver_options)
#else
bool pdo_sqlsrv_dbh_prepare(_Inout_ pdo_dbh_t *dbh, _In_ zend_string *sql_zstr, _Inout_ pdo_stmt_t *stmt, _In_ zval *driver_options)
#endif
{
PDO_RESET_DBH_ERROR;
PDO_VALIDATE_CONN;
PDO_LOG_DBH_ENTRY;
hash_auto_ptr pdo_stmt_options_ht;
sqlsrv_malloc_auto_ptr<char> sql_rewrite;
size_t sql_rewrite_len = 0;
sqlsrv_malloc_auto_ptr<pdo_sqlsrv_stmt> driver_stmt;
hash_auto_ptr placeholders;
sqlsrv_malloc_auto_ptr<sql_string_parser> sql_parser;
pdo_sqlsrv_dbh* driver_dbh = reinterpret_cast<pdo_sqlsrv_dbh*>( dbh->driver_data );
SQLSRV_ASSERT(( driver_dbh != NULL ), "pdo_sqlsrv_dbh_prepare: dbh->driver_data was null");
try {
// assign the methods for the statement object. This is necessary even if the
// statement fails so the user can retrieve the error information.
stmt->methods = &pdo_sqlsrv_stmt_methods;
// if not emulate_prepare, we support parameterized queries with ?, not names
stmt->supports_placeholders = (driver_dbh->emulate_prepare) ? PDO_PLACEHOLDER_NONE : PDO_PLACEHOLDER_POSITIONAL; // the statement options may override this later
// Initialize the options array to be passed to the core layer
ALLOC_HASHTABLE( pdo_stmt_options_ht );
core::sqlsrv_zend_hash_init( *driver_dbh , pdo_stmt_options_ht, 3 /* # of buckets */,
ZVAL_PTR_DTOR, 0 /*persistent*/ );
// Either of g_pdo_henv_cp or g_pdo_henv_ncp can be used to propogate the error.
validate_stmt_options( *driver_dbh, driver_options, pdo_stmt_options_ht );
driver_stmt = static_cast<pdo_sqlsrv_stmt*>( core_sqlsrv_create_stmt( driver_dbh, core::allocate_stmt<pdo_sqlsrv_stmt>,
pdo_stmt_options_ht, PDO_STMT_OPTS,
pdo_sqlsrv_handle_stmt_error, stmt ));
// if the user didn't set anything in the prepare options, then set the buffer limit
// to the value set on the connection.
if( driver_stmt->buffered_query_limit== sqlsrv_buffered_result_set::BUFFERED_QUERY_LIMIT_INVALID ) {
driver_stmt->buffered_query_limit = driver_dbh->client_buffer_max_size;
}
#if PHP_VERSION_ID >= 80100
zend_string* sql_rewrite_zstr = NULL;
const char* sql = ZSTR_VAL(sql_zstr);
size_t sql_len = ZSTR_LEN(sql_zstr);
#endif
// rewrite named parameters in the query to positional parameters if we aren't letting PDO do the
// parameter substitution for us
if( stmt->supports_placeholders != PDO_PLACEHOLDER_NONE ) {
// rewrite the query to map named parameters to positional parameters. We do this rather than use the ODBC named
// parameters for consistency with the PDO MySQL and PDO ODBC drivers.
#if PHP_VERSION_ID < 80100
int zr = pdo_parse_params( stmt, const_cast<char*>( sql ), sql_len, &sql_rewrite, &sql_rewrite_len );
CHECK_ZEND_ERROR(zr, driver_dbh, PDO_SQLSRV_ERROR_PARAM_PARSE) {
throw core::CoreException();
}
// if parameter substitution happened, use that query instead of the original
if (sql_rewrite != 0) {
sql = sql_rewrite;
sql_len = sql_rewrite_len;
}
#else
int zr = pdo_parse_params(stmt, sql_zstr, &sql_rewrite_zstr);
CHECK_ZEND_ERROR(zr, driver_dbh, PDO_SQLSRV_ERROR_PARAM_PARSE) {
throw core::CoreException();
}
// if parameter substitution happened, use that query instead of the original
if (sql_rewrite_zstr != NULL) {
sql = ZSTR_VAL(sql_rewrite_zstr);
sql_len = ZSTR_LEN(sql_rewrite_zstr);
}
#endif
}
if( !driver_stmt->direct_query && stmt->supports_placeholders != PDO_PLACEHOLDER_NONE ) {
core_sqlsrv_prepare(driver_stmt, sql, sql_len);
}
else if( driver_stmt->direct_query ) {
if( driver_stmt->direct_query_subst_string ) {
// we use efree rather than sqlsrv_free since sqlsrv_free may wrap another allocation scheme
// and we use estrdup below to allocate the new string, which uses emalloc
efree( reinterpret_cast<void*>( const_cast<char*>( driver_stmt->direct_query_subst_string )));
}
driver_stmt->direct_query_subst_string = estrdup( sql );
driver_stmt->direct_query_subst_string_len = sql_len;
}
#if PHP_VERSION_ID >= 80100
if (sql_rewrite_zstr != NULL) {
zend_string_release(sql_rewrite_zstr);
}
#endif
// else if stmt->support_placeholders == PDO_PLACEHOLDER_NONE means that stmt->active_query_string will be
// set to the substituted query
if ( stmt->supports_placeholders == PDO_PLACEHOLDER_NONE ) {
// parse placeholders in the sql query into the placeholders ht
ALLOC_HASHTABLE( placeholders );
core::sqlsrv_zend_hash_init(*driver_dbh, placeholders, 5, ZVAL_PTR_DTOR /* dtor */, 0 /* persistent */);
#if PHP_VERSION_ID < 80100
sql_parser = new (sqlsrv_malloc(sizeof(sql_string_parser))) sql_string_parser(*driver_dbh, stmt->query_string,
static_cast<int>(stmt->query_stringlen), placeholders);
#else
sql_parser = new (sqlsrv_malloc(sizeof(sql_string_parser))) sql_string_parser(*driver_dbh, ZSTR_VAL(stmt->query_string),
ZSTR_LEN(stmt->query_string), placeholders);
#endif
sql_parser->parse_sql_string();
driver_stmt->placeholders = placeholders;
placeholders.transferred();
}
stmt->driver_data = driver_stmt;
driver_stmt.transferred();
}
// everything is cleaned up by this point
// catch everything so the exception doesn't spill into the calling PDO code
catch( core::CoreException& ) {
if( driver_stmt ) {
driver_stmt->~pdo_sqlsrv_stmt();
}
// in the event that the statement caused an error that was copied to the connection, update the
// connection with the error's SQLSTATE.
if( driver_dbh->last_error() ) {
strcpy_s( dbh->error_code, sizeof( dbh->error_code ),
reinterpret_cast<const char*>( driver_dbh->last_error()->sqlstate ));
}
#if PHP_VERSION_ID < 80100
return 0;
#else
return false;
#endif
}
// catch any errant exception and die
catch(...) {
DIE( "pdo_sqlsrv_dbh_prepare: Unknown exception caught." );
}
#if PHP_VERSION_ID < 80100
return 1;
#else
return true;
#endif
}
// pdo_sqlsrv_dbh_do
// Maps to PDO::exec.
// Execute a SQL statement, such as an insert, update or delete, and return
// the number of rows affected.
// Parameters:
// dbh - the PDO connection object, which contains the ODBC handle
// sql - the query to execute
// sql_len - length of sql query
// Return
// # of rows affected, -1 for an error.
#if PHP_VERSION_ID < 80100
zend_long pdo_sqlsrv_dbh_do( _Inout_ pdo_dbh_t *dbh, _In_reads_bytes_(sql_len) const char *sql, _In_ size_t sql_len )
#else
zend_long pdo_sqlsrv_dbh_do(_Inout_ pdo_dbh_t *dbh, _In_ const zend_string *sql)
#endif
{
PDO_RESET_DBH_ERROR;
PDO_VALIDATE_CONN;
PDO_LOG_DBH_ENTRY;
pdo_sqlsrv_dbh* driver_dbh = static_cast<pdo_sqlsrv_dbh*>( dbh->driver_data );
sqlsrv_malloc_auto_ptr<sqlsrv_stmt> driver_stmt;
SQLLEN rows = 0;
// verify that the data type sizes are the same. If we ever upgrade to 64 bit we don't want the wrong
// thing to happen here.
SQLSRV_STATIC_ASSERT( sizeof( rows ) == sizeof( SQLLEN ));
try {
SQLSRV_ASSERT( sql != NULL, "NULL or empty SQL string passed." );
SQLSRV_ASSERT( driver_dbh != NULL, "pdo_sqlsrv_dbh_do: driver_data object was NULL.");
// temp PDO statement used for error handling if something happens
pdo_stmt_t temp_stmt;
temp_stmt.dbh = dbh;
// allocate a full driver statement to take advantage of the error handling
driver_stmt = core_sqlsrv_create_stmt( driver_dbh, core::allocate_stmt<pdo_sqlsrv_stmt>, NULL /*options_ht*/,
NULL /*valid_stmt_opts*/, pdo_sqlsrv_handle_stmt_error, &temp_stmt );
driver_stmt->set_func( __FUNCTION__ );
#if PHP_VERSION_ID < 80100
SQLRETURN execReturn = core_sqlsrv_execute(driver_stmt, sql, static_cast<int>(sql_len));
#else
SQLRETURN execReturn = core_sqlsrv_execute(driver_stmt, ZSTR_VAL(sql), ZSTR_LEN(sql));
#endif
// since the user can give us a compound statement, we return the row count for the last set, and since the row count
// isn't guaranteed to be valid until all the results have been fetched, we fetch them all first.
if ( execReturn != SQL_NO_DATA && core_sqlsrv_has_any_result( driver_stmt )) {
SQLRETURN r = SQL_SUCCESS;
do {
rows = core::SQLRowCount( driver_stmt );
r = core::SQLMoreResults( driver_stmt );
} while ( r != SQL_NO_DATA );
}
// returning -1 forces PDO to return false, which signals an error occurred. SQLRowCount returns -1 for a number of cases
// naturally, so we override that here with no rows returned.
if( rows == -1 ) {
rows = 0;
}
}
catch( core::CoreException& ) {