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php-sqlsrv/source/pdo_sqlsrv/pdo_stmt.cpp

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//---------------------------------------------------------------------------------------------------------------------------------
// File: pdo_stmt.cpp
//
// Contents: Implements the PDOStatement object for the PDO_SQLSRV
//
// Microsoft Drivers 5.10 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"
// *** internal variables and constants ***
namespace {
// Maps to the list of PDO::FETCH_ORI_* constants
SQLSMALLINT odbc_fetch_orientation[] =
{
SQL_FETCH_NEXT, // PDO_FETCH_ORI_NEXT
SQL_FETCH_PRIOR, // PDO_FETCH_ORI_PRIOR
SQL_FETCH_FIRST, // PDO_FETCH_ORI_FIRST
SQL_FETCH_LAST, // PDO_FETCH_ORI_LAST
SQL_FETCH_ABSOLUTE, // PDO_FETCH_ORI_ABS
SQL_FETCH_RELATIVE // PDO_FETCH_ORI_REL
};
// max length of a field type
const int SQL_SERVER_IDENT_SIZE_MAX = 128;
inline SQLSMALLINT pdo_fetch_ori_to_odbc_fetch_ori ( _In_ enum pdo_fetch_orientation ori )
{
SQLSRV_ASSERT( ori >= PDO_FETCH_ORI_NEXT && ori <= PDO_FETCH_ORI_REL, "Fetch orientation out of range.");
#ifdef _WIN32
OACR_WARNING_SUPPRESS( 26001, "Buffer length verified above" );
OACR_WARNING_SUPPRESS( 26000, "Buffer length verified above" );
#endif
return odbc_fetch_orientation[ori];
}
// Returns SQLSRV data type for a given PDO type. See pdo_param_type
// for list of supported pdo types.
SQLSRV_PHPTYPE pdo_type_to_sqlsrv_php_type( _Inout_ sqlsrv_stmt* driver_stmt, _In_ enum pdo_param_type pdo_type )
{
pdo_sqlsrv_stmt *pdo_stmt = static_cast<pdo_sqlsrv_stmt*>(driver_stmt);
SQLSRV_ASSERT(pdo_stmt != NULL, "pdo_type_to_sqlsrv_php_type: pdo_stmt object was null");
switch( pdo_type ) {
case PDO_PARAM_BOOL:
case PDO_PARAM_INT:
return SQLSRV_PHPTYPE_INT;
case PDO_PARAM_STR:
return SQLSRV_PHPTYPE_STRING;
case PDO_PARAM_NULL:
return SQLSRV_PHPTYPE_NULL;
case PDO_PARAM_LOB:
if (pdo_stmt->fetch_datetime) {
return SQLSRV_PHPTYPE_DATETIME;
} else {
// TODO: This will eventually be changed to SQLSRV_PHPTYPE_STREAM when output streaming is implemented.
return SQLSRV_PHPTYPE_STRING;
}
case PDO_PARAM_STMT:
THROW_PDO_ERROR( driver_stmt, PDO_SQLSRV_ERROR_PDO_STMT_UNSUPPORTED );
break;
default:
DIE( "pdo_type_to_sqlsrv_php_type: Unexpected pdo_param_type encountered" );
}
return SQLSRV_PHPTYPE_INVALID; // to prevent compiler warning
}
// Returns a pdo type for a given SQL type. See pdo_param_type
// for list of supported pdo types.
inline pdo_param_type sql_type_to_pdo_type( _In_ SQLSMALLINT sql_type )
{
pdo_param_type return_type = PDO_PARAM_STR;
switch( sql_type ) {
case SQL_BIT:
case SQL_INTEGER:
case SQL_SMALLINT:
case SQL_TINYINT:
case SQL_BIGINT:
case SQL_BINARY:
case SQL_CHAR:
case SQL_DECIMAL:
case SQL_DOUBLE:
case SQL_FLOAT:
case SQL_GUID:
case SQL_LONGVARBINARY:
case SQL_LONGVARCHAR:
case SQL_NUMERIC:
case SQL_REAL:
case SQL_SS_TIME2:
case SQL_SS_TIMESTAMPOFFSET:
case SQL_SS_UDT:
case SQL_SS_VARIANT:
case SQL_SS_XML:
case SQL_TYPE_DATE:
case SQL_TYPE_TIMESTAMP:
case SQL_VARBINARY:
case SQL_VARCHAR:
case SQL_WCHAR:
case SQL_WLONGVARCHAR:
case SQL_WVARCHAR:
return_type = PDO_PARAM_STR;
break;
default: {
DIE( "sql_type_to_pdo_type: Invalid SQL type provided." );
break;
}
}
return return_type;
}
// Calls core_sqlsrv_set_scrollable function to set cursor.
// PDO supports two cursor types: PDO_CURSOR_FWDONLY, PDO_CURSOR_SCROLL.
void set_stmt_cursors( _Inout_ sqlsrv_stmt* stmt, _In_ zval* value_z )
{
if( Z_TYPE_P( value_z ) != IS_LONG ) {
THROW_PDO_ERROR( stmt, PDO_SQLSRV_ERROR_INVALID_CURSOR_TYPE );
}
zend_long pdo_cursor_type = Z_LVAL_P( value_z );
long odbc_cursor_type = -1;
switch( pdo_cursor_type ) {
case PDO_CURSOR_FWDONLY:
odbc_cursor_type = SQL_CURSOR_FORWARD_ONLY;
break;
case PDO_CURSOR_SCROLL:
odbc_cursor_type = SQL_CURSOR_STATIC;
break;
default:
THROW_PDO_ERROR( stmt, PDO_SQLSRV_ERROR_INVALID_CURSOR_TYPE );
}
core_sqlsrv_set_scrollable( stmt, odbc_cursor_type );
}
void set_stmt_cursor_scroll_type( _Inout_ sqlsrv_stmt* stmt, _In_ zval* value_z )
{
if( Z_TYPE_P( value_z ) != IS_LONG ) {
THROW_PDO_ERROR( stmt, PDO_SQLSRV_ERROR_INVALID_CURSOR_TYPE );
}
if( stmt->cursor_type == SQL_CURSOR_FORWARD_ONLY ) {
THROW_PDO_ERROR( stmt, PDO_SQLSRV_ERROR_INVALID_CURSOR_WITH_SCROLL_TYPE );
}
long odbc_cursor_type = static_cast<long>( Z_LVAL_P( value_z ) );
core_sqlsrv_set_scrollable( stmt, odbc_cursor_type );
return;
}
// Sets the statement encoding. Default encoding on the statement
// implies use the connection's encoding.
void set_stmt_encoding( _Inout_ sqlsrv_stmt* stmt, _In_ zval* value_z )
{
// validate the value
if( Z_TYPE_P( value_z ) != IS_LONG ) {
THROW_PDO_ERROR( stmt, PDO_SQLSRV_ERROR_INVALID_ENCODING );
}
zend_long attr_value = Z_LVAL_P( value_z );
switch( attr_value ) {
// when the default encoding is applied to a statement, it means use the creating connection's encoding
case SQLSRV_ENCODING_DEFAULT:
case SQLSRV_ENCODING_BINARY:
case SQLSRV_ENCODING_SYSTEM:
case SQLSRV_ENCODING_UTF8:
stmt->set_encoding( static_cast<SQLSRV_ENCODING>( attr_value ));
break;
default:
THROW_PDO_ERROR( stmt, PDO_SQLSRV_ERROR_INVALID_ENCODING );
break;
}
}
zval convert_to_zval(_Inout_ sqlsrv_stmt* stmt, _In_ SQLSRV_PHPTYPE sqlsrv_php_type, _Inout_ void** in_val, _In_opt_ SQLLEN field_len )
{
zval out_zval;
ZVAL_UNDEF(&out_zval);
switch (sqlsrv_php_type) {
case SQLSRV_PHPTYPE_INT:
case SQLSRV_PHPTYPE_FLOAT:
{
if (*in_val == NULL) {
ZVAL_NULL(&out_zval);
}
else {
if (sqlsrv_php_type == SQLSRV_PHPTYPE_INT) {
ZVAL_LONG(&out_zval, **(reinterpret_cast<int**>(in_val)));
}
else {
ZVAL_DOUBLE(&out_zval, **(reinterpret_cast<double**>(in_val)));
}
}
if (*in_val) {
sqlsrv_free(*in_val);
}
break;
}
case SQLSRV_PHPTYPE_STRING:
case SQLSRV_PHPTYPE_STREAM: // TODO: this will be moved when output streaming is implemented
{
if (*in_val == NULL) {
ZVAL_NULL(&out_zval);
}
else {
ZVAL_STRINGL(&out_zval, reinterpret_cast<char*>(*in_val), field_len);
sqlsrv_free(*in_val);
}
break;
}
case SQLSRV_PHPTYPE_DATETIME:
convert_datetime_string_to_zval(stmt, static_cast<char*>(*in_val), field_len, out_zval);
sqlsrv_free(*in_val);
break;
case SQLSRV_PHPTYPE_NULL:
ZVAL_NULL(&out_zval);
break;
default:
DIE("Unknown php type");
break;
}
return out_zval;
}
} // namespace
int pdo_sqlsrv_stmt_dtor( _Inout_ pdo_stmt_t *stmt );
int pdo_sqlsrv_stmt_execute( _Inout_ pdo_stmt_t *stmt );
int pdo_sqlsrv_stmt_fetch( _Inout_ pdo_stmt_t *stmt, _In_ enum pdo_fetch_orientation ori,
_In_ zend_long offset );
int pdo_sqlsrv_stmt_param_hook( _Inout_ pdo_stmt_t *stmt,
_Inout_ struct pdo_bound_param_data *param, _In_ enum pdo_param_event event_type );
int pdo_sqlsrv_stmt_describe_col( _Inout_ pdo_stmt_t *stmt, _In_ int colno );
#if PHP_VERSION_ID < 80100
int pdo_sqlsrv_stmt_get_col_data( _Inout_ pdo_stmt_t *stmt, _In_ int colno,
_Out_writes_bytes_opt_(*len) char **ptr, _Inout_ size_t *len, _Out_opt_ int *caller_frees );
#else
int pdo_sqlsrv_stmt_get_col_data(_Inout_ pdo_stmt_t *stmt, _In_ int colno, _Inout_ zval *result, _Inout_ enum pdo_param_type *type);
#endif
int pdo_sqlsrv_stmt_set_attr( _Inout_ pdo_stmt_t *stmt, _In_ zend_long attr, _Inout_ zval *val );
int pdo_sqlsrv_stmt_get_attr( _Inout_ pdo_stmt_t *stmt, _In_ zend_long attr, _Inout_ zval *return_value );
int pdo_sqlsrv_stmt_get_col_meta( _Inout_ pdo_stmt_t *stmt, _In_ zend_long colno, _Inout_ zval *return_value );
int pdo_sqlsrv_stmt_next_rowset( _Inout_ pdo_stmt_t *stmt );
int pdo_sqlsrv_stmt_close_cursor( _Inout_ pdo_stmt_t *stmt );
struct pdo_stmt_methods pdo_sqlsrv_stmt_methods = {
pdo_sqlsrv_stmt_dtor,
pdo_sqlsrv_stmt_execute,
pdo_sqlsrv_stmt_fetch,
pdo_sqlsrv_stmt_describe_col,
pdo_sqlsrv_stmt_get_col_data,
pdo_sqlsrv_stmt_param_hook,
pdo_sqlsrv_stmt_set_attr,
pdo_sqlsrv_stmt_get_attr,
pdo_sqlsrv_stmt_get_col_meta,
pdo_sqlsrv_stmt_next_rowset,
pdo_sqlsrv_stmt_close_cursor
};
void stmt_option_pdo_scrollable:: operator()( _Inout_ sqlsrv_stmt* stmt, stmt_option const* /*opt*/, _In_ zval* value_z )
{
set_stmt_cursors( stmt, value_z );
}
void stmt_option_encoding:: operator()( _Inout_ sqlsrv_stmt* stmt, stmt_option const* /*opt*/, _In_ zval* value_z )
{
set_stmt_encoding( stmt, value_z );
}
void stmt_option_direct_query:: operator()( _Inout_ sqlsrv_stmt* stmt, stmt_option const* /*opt*/, _In_ zval* value_z )
{
pdo_sqlsrv_stmt *pdo_stmt = static_cast<pdo_sqlsrv_stmt*>( stmt );
pdo_stmt->direct_query = zend_is_true(value_z);
}
void stmt_option_cursor_scroll_type:: operator()( _Inout_ sqlsrv_stmt* stmt, stmt_option const* /*opt*/, _In_ zval* value_z )
{
set_stmt_cursor_scroll_type( stmt, value_z );
}
void stmt_option_emulate_prepares:: operator()( _Inout_ sqlsrv_stmt* stmt, stmt_option const* /*opt*/, _In_ zval* value_z )
{
pdo_stmt_t *pdo_stmt = static_cast<pdo_stmt_t*>( stmt->driver() );
pdo_stmt->supports_placeholders = ( zend_is_true( value_z )) ? PDO_PLACEHOLDER_NONE : PDO_PLACEHOLDER_POSITIONAL;
}
void stmt_option_fetch_numeric:: operator()( _Inout_ sqlsrv_stmt* stmt, stmt_option const* /*opt*/, _In_ zval* value_z )
{
pdo_sqlsrv_stmt *pdo_stmt = static_cast<pdo_sqlsrv_stmt*>( stmt );
pdo_stmt->fetch_numeric = zend_is_true(value_z);
}
void stmt_option_fetch_datetime:: operator()( _Inout_ sqlsrv_stmt* stmt, stmt_option const* /*opt*/, _In_ zval* value_z )
{
pdo_sqlsrv_stmt *pdo_stmt = static_cast<pdo_sqlsrv_stmt*>( stmt );
pdo_stmt->fetch_datetime = zend_is_true(value_z);
}
// log a function entry point
#define PDO_LOG_STMT_ENTRY \
{ \
pdo_sqlsrv_stmt* driver_stmt = reinterpret_cast<pdo_sqlsrv_stmt*>( stmt->driver_data ); \
if (driver_stmt != NULL) driver_stmt->set_func( __FUNCTION__ ); \
core_sqlsrv_register_severity_checker(pdo_severity_check); \
LOG(SEV_NOTICE, "%1!s!: entering", __FUNCTION__); \
}
// PDO SQLSRV statement destructor
pdo_sqlsrv_stmt::~pdo_sqlsrv_stmt( void )
{
if( bound_column_param_types ) {
sqlsrv_free( bound_column_param_types );
bound_column_param_types = NULL;
}
if( direct_query_subst_string ) {
// we use efree rather than sqlsrv_free since sqlsrv_free may wrap another allocation scheme
// and we use estrdup to allocate this string, which uses emalloc
efree( reinterpret_cast<void*>( const_cast<char*>( direct_query_subst_string )));
}
}
// pdo_sqlsrv_stmt_close_cursor
// Close any open cursors on the statement. Maps to PDO function PDOStatement::closeCursor.
// Parameters:
// *stmt - Pointer to current statement
// Return:
// Returns 0 for failure, 1 for success.
int pdo_sqlsrv_stmt_close_cursor( _Inout_ pdo_stmt_t *stmt )
{
PDO_RESET_STMT_ERROR;
PDO_VALIDATE_STMT;
PDO_LOG_STMT_ENTRY;
try {
SQLSRV_ASSERT( stmt != NULL, "pdo_sqlsrv_stmt_close_cursor: pdo_stmt object was null" );
sqlsrv_stmt* driver_stmt = reinterpret_cast<sqlsrv_stmt*>( stmt->driver_data );
SQLSRV_ASSERT( driver_stmt != NULL, "pdo_sqlsrv_stmt_close_cursor: driver_data object was null" );
// to "close the cursor" means we make the statement ready for execution again. To do this, we
// skip all the result sets on the current statement.
// If the statement has not been executed there are no next results to iterate over.
if ( driver_stmt && driver_stmt->executed == true )
{
while( driver_stmt && driver_stmt->past_next_result_end == false ) {
core_sqlsrv_next_result( driver_stmt );
}
}
}
catch( core::CoreException& ) {
return 0;
}
catch( ... ) {
DIE( "pdo_sqlsrv_stmt_close_cursor: Unknown exception occurred while advancing to the next result set." );
}
return 1;
}
// pdo_sqlsrv_stmt_describe_col
// Gets the metadata for a column based on the column number.
// Calls the core_sqlsrv_field_metadata function present in the core layer.
// Parameters:
// *stmt - pointer to current statement
// colno - Index of the column which requires description.
// Return:
// 0 for failure, 1 for success.
int pdo_sqlsrv_stmt_describe_col( _Inout_ pdo_stmt_t *stmt, _In_ int colno)
{
PDO_RESET_STMT_ERROR;
PDO_VALIDATE_STMT;
PDO_LOG_STMT_ENTRY;
SQLSRV_ASSERT(( colno >= 0 ), "pdo_sqlsrv_stmt_describe_col: Column number should be >= 0." );
SQLSRV_ASSERT( stmt->driver_data != NULL, "pdo_sqlsrv_stmt_describe_col: driver_data object was NULL." );
sqlsrv_malloc_auto_ptr<field_meta_data> core_meta_data;
try {
core_meta_data = core_sqlsrv_field_metadata( reinterpret_cast<sqlsrv_stmt*>( stmt->driver_data ), colno );
}
catch( core::CoreException& ) {
return 0;
}
catch(...) {
DIE( "pdo_sqlsrv_stmt_describe_col: Unexpected exception occurred." );
}
pdo_column_data* column_data = &(stmt->columns[colno]);
SQLSRV_ASSERT( column_data != NULL, "pdo_sqsrv_stmt_describe_col: pdo_column_data was null" );
// Set the name
column_data->name = zend_string_init( (const char*)core_meta_data->field_name.get(), core_meta_data->field_name_len, 0 );
// Set the maxlen
column_data->maxlen = ( core_meta_data->field_precision > 0 ) ? core_meta_data->field_precision : core_meta_data->field_size;
// Set the precision
column_data->precision = core_meta_data->field_scale;
#if PHP_VERSION_ID < 80100
// Set the param_type
column_data->param_type = PDO_PARAM_ZVAL;
#endif
// store the field data for use by pdo_sqlsrv_stmt_get_col_data
pdo_sqlsrv_stmt* driver_stmt = reinterpret_cast<pdo_sqlsrv_stmt*>( stmt->driver_data );
SQLSRV_ASSERT( driver_stmt != NULL, "Invalid driver statement in pdo_sqlsrv_stmt_describe_col" );
driver_stmt->current_meta_data.push_back( core_meta_data.get() );
SQLSRV_ASSERT( driver_stmt->current_meta_data.size() == colno + 1, "Meta data vector out of sync with column numbers" );
core_meta_data.transferred();
return 1;
}
// pdo_sqlsrv_stmt_dtor
// Maps to PDOStatement::__destruct. Destructor for the PDO Statement.
// Parameters:
// *stmt - pointer to current statement
// Return:
// 1 for success.
int pdo_sqlsrv_stmt_dtor( _Inout_ pdo_stmt_t *stmt )
{
pdo_sqlsrv_stmt* driver_stmt = reinterpret_cast<pdo_sqlsrv_stmt*>( stmt->driver_data );
LOG( SEV_NOTICE, "pdo_sqlsrv_stmt_dtor: entering" );
// if a PDO statement didn't complete preparation, its driver_data can be NULL
if (driver_stmt == NULL) {
return 1;
}
// occasionally stmt->dbh->driver_data is already freed and reset but its driver_data is not
if (stmt->dbh != NULL && stmt->dbh->driver_data == NULL) {
stmt->driver_data = NULL;
return 1;
}
if ( driver_stmt->placeholders != NULL ) {
zend_hash_destroy( driver_stmt->placeholders );
FREE_HASHTABLE( driver_stmt->placeholders );
driver_stmt->placeholders = NULL;
}
(( sqlsrv_stmt* )driver_stmt )->~sqlsrv_stmt();
sqlsrv_free( driver_stmt );
stmt->driver_data = NULL;
return 1;
}
// pdo_sqlsrv_stmt_execute
// Maps to PDOStatement::Execute. Executes the prepared statement.
// Parameters:
// *stmt - pointer to the current statement.
// Return:
// 0 for failure, 1 for success.
int pdo_sqlsrv_stmt_execute( _Inout_ pdo_stmt_t *stmt )
{
PDO_RESET_STMT_ERROR;
PDO_VALIDATE_STMT;
PDO_LOG_STMT_ENTRY;
try {
pdo_sqlsrv_stmt* driver_stmt = reinterpret_cast<pdo_sqlsrv_stmt*>( stmt->driver_data );
SQLSRV_ASSERT( driver_stmt != NULL, "pdo_sqlsrv_stmt_execute: driver_data object was null" );
// prepare for execution by flushing anything remaining in the result set if it wasn't already
// done before binding parameters
if( driver_stmt && driver_stmt->executed && !driver_stmt->past_next_result_end ) {
while( driver_stmt->past_next_result_end == false ) {
core_sqlsrv_next_result( driver_stmt, false );
}
}
const char* query = NULL;
unsigned int query_len = 0;
// if the user is doing a direct query (PDO::SQLSRV_ATTR_DIRECT_QUERY), set the query here
if( driver_stmt->direct_query ) {
query = driver_stmt->direct_query_subst_string;
query_len = static_cast<unsigned int>( driver_stmt->direct_query_subst_string_len );
}
// if the user is using prepare emulation (PDO::ATTR_EMULATE_PREPARES), set the query to the
// subtituted query provided by PDO
if (stmt->supports_placeholders == PDO_PLACEHOLDER_NONE) {
// reset the placeholders hashtable internal in case the user reexecutes a statement
// Normally it's not a good idea to alter the internal pointer in a hashed array
// (see pull request 634 on GitHub) but in this case this is for internal use only
zend_hash_internal_pointer_reset(driver_stmt->placeholders);
#if PHP_VERSION_ID < 80100
query = stmt->active_query_string;
query_len = static_cast<unsigned int>(stmt->active_query_stringlen);
#else
query = ZSTR_VAL(stmt->active_query_string);
query_len = ZSTR_LEN(stmt->active_query_string);
#endif
}
// The query timeout setting is inherited from the corresponding connection attribute, but
// the user may have changed the query timeout setting again before this via
// PDOStatement::setAttribute()
driver_stmt->set_query_timeout();
SQLRETURN execReturn = core_sqlsrv_execute( driver_stmt, query, query_len );
if ( execReturn == SQL_NO_DATA ) {
stmt->column_count = 0;
stmt->row_count = 0;
driver_stmt->column_count = 0;
driver_stmt->row_count = 0;
}
else {
if (driver_stmt->column_count == ACTIVE_NUM_COLS_INVALID) {
stmt->column_count = core::SQLNumResultCols( driver_stmt );
driver_stmt->column_count = stmt->column_count;
}
else {
stmt->column_count = driver_stmt->column_count;
}
if (driver_stmt->row_count == ACTIVE_NUM_ROWS_INVALID) {
// return the row count regardless if there are any rows or not
stmt->row_count = core::SQLRowCount( driver_stmt );
driver_stmt->row_count = stmt->row_count;
}
else {
stmt->row_count = driver_stmt->row_count;
}
}
// workaround for a bug in the PDO driver manager. It is fairly simple to crash the PDO driver manager with
// the following sequence:
// 1) Prepare and execute a statement (that has some results with it)
// 2) call PDOStatement::nextRowset until there are no more results
// 3) execute the statement again
// 4) call PDOStatement::getColumnMeta
// It crashes from what I can tell because there is no metadata because there was no call to
// pdo_stmt_sqlsrv_describe_col and stmt->columns is NULL on the second call to
// PDO::execute. My guess is that because stmt->executed is true, it optimizes away a necessary call to
// pdo_sqlsrv_stmt_describe_col. By setting the stmt->executed flag to 0, this call is not optimized away
// and the crash disappears.
if( stmt->columns == NULL ) {
stmt->executed = 0;
}
}
catch( core::CoreException& /*e*/ ) {
return 0;
}
catch( ... ) {
DIE( "pdo_sqlsrv_stmt_execute: Unexpected exception occurred." );
}
// success
return 1;
}
// pdo_sqlsrv_stmt_fetch
// Maps to PDOStatement::fetch
// Move the cursor to the record indicated. If the cursor is moved off the end,
// or before the beginning if a scrollable cursor is created, then FAILURE is returned.
// Parameters:
// *stmt - pointer to current statement for which the cursor should be moved.
// ori - cursor orientation. Maps to the list of PDO::FETCH_ORI_* constants
// offset - For orientations that use it, offset to move to.
// Return:
// 0 for failure, 1 for success.
int pdo_sqlsrv_stmt_fetch( _Inout_ pdo_stmt_t *stmt, _In_ enum pdo_fetch_orientation ori,
_In_ zend_long offset)
{
PDO_RESET_STMT_ERROR;
PDO_VALIDATE_STMT;
PDO_LOG_STMT_ENTRY;
try {
SQLSRV_ASSERT( stmt != NULL, "pdo_sqlsrv_stmt_fetch: pdo_stmt object was null" );
pdo_sqlsrv_stmt* driver_stmt = reinterpret_cast<pdo_sqlsrv_stmt*>( stmt->driver_data );
SQLSRV_ASSERT( driver_stmt != NULL, "pdo_sqlsrv_stmt_fetch: driver_data object was null" );
// set the types for bound columns to zval so that PDO does no conversion when the value
// is returned by pdo_sqlsrv_get_col_data. Remember the types that were bound by the user
// and use it to manually convert data types
if( stmt->bound_columns ) {
pdo_bound_param_data* bind_data = NULL;
if( !driver_stmt->bound_column_param_types ) {
#if PHP_VERSION_ID < 80100
driver_stmt->bound_column_param_types =
reinterpret_cast<pdo_param_type*>( sqlsrv_malloc( stmt->column_count, sizeof( pdo_param_type ), 0 ));
std::fill( driver_stmt->bound_column_param_types, driver_stmt->bound_column_param_types + stmt->column_count,
PDO_PARAM_ZVAL );
#else
// TODO: possibly no longer need bound_column_param_types?? default to PDO_PARAM_STR???
driver_stmt->bound_column_param_types =
reinterpret_cast<pdo_param_type*>(sqlsrv_malloc(stmt->column_count, sizeof(pdo_param_type), 0));
std::fill(driver_stmt->bound_column_param_types, driver_stmt->bound_column_param_types + stmt->column_count,
PDO_PARAM_STR);
#endif
}
for( long i = 0; i < stmt->column_count; ++i ) {
#if PHP_VERSION_ID < 80100
if (NULL== (bind_data = reinterpret_cast<pdo_bound_param_data*>(zend_hash_index_find_ptr(stmt->bound_columns, i))) &&
(NULL == (bind_data = reinterpret_cast<pdo_bound_param_data*>(zend_hash_find_ptr(stmt->bound_columns, stmt->columns[i].name))))) {
driver_stmt->bound_column_param_types[i] = PDO_PARAM_ZVAL;
continue;
}
if( bind_data->param_type != PDO_PARAM_ZVAL ) {
driver_stmt->bound_column_param_types[i] = bind_data->param_type;
bind_data->param_type = PDO_PARAM_ZVAL;
}
#else
if (NULL == (bind_data = reinterpret_cast<pdo_bound_param_data*>(zend_hash_index_find_ptr(stmt->bound_columns, i))) &&
(NULL == (bind_data = reinterpret_cast<pdo_bound_param_data*>(zend_hash_find_ptr(stmt->bound_columns, stmt->columns[i].name))))) {
continue;
}
// TODO: possibly no longer need bound_column_param_types??
driver_stmt->bound_column_param_types[i] = bind_data->param_type;
#endif
}
}
SQLSMALLINT odbc_fetch_ori = pdo_fetch_ori_to_odbc_fetch_ori( ori );
bool data = core_sqlsrv_fetch( driver_stmt, odbc_fetch_ori, offset );
// support for the PDO rowCount method. Since rowCount doesn't call a
// method, PDO relies on us to fill the pdo_stmt_t::row_count member
// The if condition was changed from
// `driver_stmt->past_fetch_end || driver_stmt->cursor_type != SQL_CURSOR_FORWARD_ONLY`
// because it caused SQLRowCount to be called at each fetch if using a non-forward cursor
// which is unnecessary and a performance hit
if( driver_stmt->past_fetch_end || driver_stmt->cursor_type == SQL_CURSOR_DYNAMIC) {
stmt->row_count = core::SQLRowCount( driver_stmt );
driver_stmt->row_count = stmt->row_count;
// a row_count of -1 means no rows, but we change it to 0
if( stmt->row_count == -1 ) {
stmt->row_count = 0;
}
}
// if no data was returned, then return false so data isn't retrieved
if( !data ) {
return 0;
}
return 1;
}
catch( core::CoreException& ) {
return 0;
}
catch( ... ) {
DIE ("pdo_sqlsrv_stmt_fetch: Unexpected exception occurred.");
}
// Should not have reached here but adding this due to compilation warnings
return 0;
}
// pdo_sqlsrv_stmt_get_col_data
// Called by the set of PDO Fetch functions.
// Retrieves a single column. PDO driver manager is responsible for freeing the
// returned buffer. Because PDO can request fields out of order and ODBC does not
// support out of order field requests, this function should also cache fields.
// Parameters:
// stmt - Statement to retrive the column for.
// colno - Index of the column that needs to be retrieved. Starts with 0.
// ptr - Returns the buffer containing the column data.
// len - Length of the buffer returned.
// caller_frees - Flag to let the PDO driver manager know that it is responsible for
// freeing the memory.
// Return:
// 0 for failure, 1 for success.
#if PHP_VERSION_ID < 80100
int pdo_sqlsrv_stmt_get_col_data( _Inout_ pdo_stmt_t *stmt, _In_ int colno,
_Out_writes_bytes_opt_(*len) char **ptr, _Inout_ size_t *len, _Out_opt_ int *caller_frees)
#else
int pdo_sqlsrv_stmt_get_col_data(_Inout_ pdo_stmt_t *stmt, _In_ int colno, _Inout_ zval *result_z, _Inout_ enum pdo_param_type *type)
#endif
{
PDO_RESET_STMT_ERROR;
PDO_VALIDATE_STMT;
PDO_LOG_STMT_ENTRY;
try {
SQLSRV_ASSERT(stmt != NULL, "pdo_sqlsrv_stmt_get_col_data: pdo_stmt object was null");
pdo_sqlsrv_stmt* driver_stmt = reinterpret_cast<pdo_sqlsrv_stmt*>(stmt->driver_data);
SQLSRV_ASSERT(driver_stmt != NULL, "pdo_sqlsrv_stmt_get_col_data: driver_data object was null");
CHECK_CUSTOM_ERROR((colno < 0), driver_stmt, PDO_SQLSRV_ERROR_INVALID_COLUMN_INDEX) {
return 0;
}
#if PHP_VERSION_ID < 80100
// Let PDO free the memory after use.
* caller_frees = 1;
#endif
// translate the pdo type to a type the core layer understands
sqlsrv_phptype sqlsrv_php_type;
SQLSRV_ASSERT(colno >= 0 && colno < static_cast<int>(driver_stmt->current_meta_data.size()),
"Invalid column number in pdo_sqlsrv_stmt_get_col_data");
// set the encoding if the user specified one via bindColumn, otherwise use the statement's encoding
// save the php type for next use
sqlsrv_php_type = driver_stmt->sql_type_to_php_type(
static_cast<SQLINTEGER>(driver_stmt->current_meta_data[colno]->field_type),
static_cast<SQLUINTEGER>(driver_stmt->current_meta_data[colno]->field_size),
true);
driver_stmt->current_meta_data[colno]->sqlsrv_php_type = sqlsrv_php_type;
// if a column is bound to a type different than the column type, figure out a way to convert it to the
// type they want
#if PHP_VERSION_ID < 80100
if (stmt->bound_columns && driver_stmt->bound_column_param_types[colno] != PDO_PARAM_ZVAL) {
#else
if (stmt->bound_columns) {
#endif
sqlsrv_php_type.typeinfo.type = pdo_type_to_sqlsrv_php_type(driver_stmt,
driver_stmt->bound_column_param_types[colno]
);
pdo_bound_param_data* bind_data = NULL;
bind_data = reinterpret_cast<pdo_bound_param_data*>(zend_hash_index_find_ptr(stmt->bound_columns, colno));
if (bind_data == NULL) {
// can't find by index then try searching by name
bind_data = reinterpret_cast<pdo_bound_param_data*>(zend_hash_find_ptr(stmt->bound_columns, stmt->columns[colno].name));
}
if (bind_data != NULL && !Z_ISUNDEF(bind_data->driver_params)) {
CHECK_CUSTOM_ERROR(Z_TYPE(bind_data->driver_params) != IS_LONG, driver_stmt,
PDO_SQLSRV_ERROR_INVALID_COLUMN_DRIVER_DATA, colno + 1) {
throw pdo::PDOException();
}
CHECK_CUSTOM_ERROR(driver_stmt->bound_column_param_types[colno] != PDO_PARAM_STR
&& driver_stmt->bound_column_param_types[colno] != PDO_PARAM_LOB, driver_stmt,
PDO_SQLSRV_ERROR_COLUMN_TYPE_DOES_NOT_SUPPORT_ENCODING, colno + 1) {
throw pdo::PDOException();
}
sqlsrv_php_type.typeinfo.encoding = Z_LVAL(bind_data->driver_params);
switch (sqlsrv_php_type.typeinfo.encoding) {
case SQLSRV_ENCODING_SYSTEM:
case SQLSRV_ENCODING_BINARY:
case SQLSRV_ENCODING_UTF8:
break;
default:
THROW_PDO_ERROR(driver_stmt, PDO_SQLSRV_ERROR_INVALID_DRIVER_COLUMN_ENCODING, colno);
break;
}
}
// save the php type for the bound column
driver_stmt->current_meta_data[colno]->sqlsrv_php_type = sqlsrv_php_type;
}
SQLSRV_PHPTYPE sqlsrv_phptype_out = SQLSRV_PHPTYPE_INVALID;
#if PHP_VERSION_ID < 80100
core_sqlsrv_get_field(driver_stmt, colno, sqlsrv_php_type, false, *(reinterpret_cast<void**>(ptr)),
reinterpret_cast<SQLLEN*>(len), true, &sqlsrv_phptype_out);
if (ptr) {
zval* zval_ptr = reinterpret_cast<zval*>(sqlsrv_malloc(sizeof(zval)));
*zval_ptr = convert_to_zval(driver_stmt, sqlsrv_phptype_out, reinterpret_cast<void**>(ptr), *len);
*ptr = reinterpret_cast<char*>(zval_ptr);
*len = sizeof(zval);
}
#else
SQLLEN len = 0;
void *ptr = NULL;
core_sqlsrv_get_field(driver_stmt, colno, sqlsrv_php_type, false, ptr, &len, true, &sqlsrv_phptype_out);
if (ptr) {
*result_z = convert_to_zval(driver_stmt, sqlsrv_phptype_out, &ptr, len);
}
#endif
return 1;
}
catch ( core::CoreException& ) {
return 0;
}
catch ( ... ) {
DIE ("pdo_sqlsrv_stmt_get_col_data: Unexpected exception occurred.");
}
// Should not have reached here but adding this due to compilation warnings
return 0;
}
// pdo_sqlsrv_stmt_set_attr
// Maps to the PDOStatement::setAttribute. Sets the attribute on a statement.
// Parameters:
// stmt - Current statement on which the attribute should be set.
// attr - Represents any valid set of attribute constants supported by this driver.
// val - Attribute value.
// Return:
// 0 for failure, 1 for success.
int pdo_sqlsrv_stmt_set_attr( _Inout_ pdo_stmt_t *stmt, _In_ zend_long attr, _Inout_ zval *val)
{
PDO_RESET_STMT_ERROR;
PDO_VALIDATE_STMT;
PDO_LOG_STMT_ENTRY;
pdo_sqlsrv_stmt* driver_stmt = static_cast<pdo_sqlsrv_stmt*>( stmt->driver_data );
SQLSRV_ASSERT( driver_stmt != NULL, "pdo_sqlsrv_stmt_set_attr: driver_data object was null" );
try {
switch( attr ) {
case SQLSRV_ATTR_DIRECT_QUERY:
THROW_PDO_ERROR( driver_stmt, PDO_SQLSRV_ERROR_DQ_ATTR_AT_PREPARE_ONLY );
break;
case SQLSRV_ATTR_ENCODING:
set_stmt_encoding( driver_stmt, val );
break;
case PDO_ATTR_CURSOR:
THROW_PDO_ERROR( driver_stmt, PDO_SQLSRV_ERROR_CURSOR_ATTR_AT_PREPARE_ONLY );
break;
case SQLSRV_ATTR_QUERY_TIMEOUT:
core_sqlsrv_set_query_timeout( driver_stmt, val );
break;
case SQLSRV_ATTR_CURSOR_SCROLL_TYPE:
THROW_PDO_ERROR( driver_stmt, PDO_SQLSRV_ERROR_CURSOR_ATTR_AT_PREPARE_ONLY );
break;
case SQLSRV_ATTR_CLIENT_BUFFER_MAX_KB_SIZE:
core_sqlsrv_set_buffered_query_limit( driver_stmt, val );
break;
case SQLSRV_ATTR_FETCHES_NUMERIC_TYPE:
driver_stmt->fetch_numeric = zend_is_true(val);
break;
case SQLSRV_ATTR_FETCHES_DATETIME_TYPE:
driver_stmt->fetch_datetime = zend_is_true(val);
break;
case SQLSRV_ATTR_FORMAT_DECIMALS:
driver_stmt->format_decimals = zend_is_true(val);
break;
case SQLSRV_ATTR_DECIMAL_PLACES:
core_sqlsrv_set_decimal_places(driver_stmt, val);
break;
case SQLSRV_ATTR_DATA_CLASSIFICATION:
driver_stmt->data_classification = zend_is_true(val);
break;
default:
THROW_PDO_ERROR( driver_stmt, PDO_SQLSRV_ERROR_INVALID_STMT_ATTR );
break;
}
}
catch( core::CoreException& ) {
return 0;
}
catch ( ... ) {
DIE ("pdo_sqlsrv_stmt_set_attr: Unexpected exception occurred.");
}
return 1;
}
// pdo_sqlsrv_stmt_get_attr
// Maps to the PDOStatement::getAttribute. Gets the value of a given attribute on a statement.
// Parameters:
// stmt - Current statement for which the attribute value is requested.
// attr - Represents any valid set of attribute constants supported by this driver.
// return_value - Attribute value.
// Return:
// 0 for failure, 1 for success.
int pdo_sqlsrv_stmt_get_attr( _Inout_ pdo_stmt_t *stmt, _In_ zend_long attr, _Inout_ zval *return_value )
{
PDO_RESET_STMT_ERROR;
PDO_VALIDATE_STMT;
PDO_LOG_STMT_ENTRY;
pdo_sqlsrv_stmt* driver_stmt = static_cast<pdo_sqlsrv_stmt*>( stmt->driver_data );
SQLSRV_ASSERT(( driver_stmt != NULL ), "pdo_sqlsrv_stmt_get_attr: stmt->driver_data was null" );
try {
switch( attr ) {
case SQLSRV_ATTR_DIRECT_QUERY:
{
ZVAL_BOOL( return_value, driver_stmt->direct_query );
break;
}
case SQLSRV_ATTR_ENCODING:
{
ZVAL_LONG( return_value, driver_stmt->encoding() );
break;
}
case PDO_ATTR_CURSOR:
{
ZVAL_LONG( return_value, ( driver_stmt->cursor_type != SQL_CURSOR_FORWARD_ONLY ?
PDO_CURSOR_SCROLL : PDO_CURSOR_FWDONLY ));
break;
}
case SQLSRV_ATTR_CURSOR_SCROLL_TYPE:
{
ZVAL_LONG( return_value, driver_stmt->cursor_type );
break;
}
case SQLSRV_ATTR_CLIENT_BUFFER_MAX_KB_SIZE:
{
ZVAL_LONG( return_value, driver_stmt->buffered_query_limit );
break;
}
case SQLSRV_ATTR_QUERY_TIMEOUT:
{
ZVAL_LONG( return_value, ( driver_stmt->query_timeout == QUERY_TIMEOUT_INVALID ? 0 : driver_stmt->query_timeout ));
break;
}
case SQLSRV_ATTR_FETCHES_NUMERIC_TYPE:
{
ZVAL_BOOL( return_value, driver_stmt->fetch_numeric );
break;
}
case SQLSRV_ATTR_FETCHES_DATETIME_TYPE:
{
ZVAL_BOOL( return_value, driver_stmt->fetch_datetime );
break;
}
case SQLSRV_ATTR_FORMAT_DECIMALS:
{
ZVAL_BOOL( return_value, driver_stmt->format_decimals );
break;
}
case SQLSRV_ATTR_DECIMAL_PLACES:
{
ZVAL_LONG( return_value, driver_stmt->decimal_places );
break;
}
case SQLSRV_ATTR_DATA_CLASSIFICATION:
{
ZVAL_BOOL(return_value, driver_stmt->data_classification);
break;
}
default:
THROW_PDO_ERROR( driver_stmt, PDO_SQLSRV_ERROR_INVALID_STMT_ATTR );
break;
}
}
catch( core::CoreException& ) {
return 0;
}
catch ( ... ) {
DIE ("pdo_sqlsrv_stmt_get_attr: Unexpected exception occurred.");
}
return 1;
}
// pdo_sqlsrv_stmt_get_col_meta
// Maps to PDOStatement::getColumnMeta. Return extra metadata.
// Though we don't return any extra metadata, PDO relies on us to
// create the associative array that holds the standard information,
// so we create one and return it for PDO's use.
// Parameters:
// stmt - Current statement.
// colno - The index of the field for which to return the metadata.
// return_value - zval* consisting of the metadata.
// Return:
// FAILURE for failure, SUCCESS for success.
int pdo_sqlsrv_stmt_get_col_meta( _Inout_ pdo_stmt_t *stmt, _In_ zend_long colno, _Inout_ zval *return_value)
{
PDO_RESET_STMT_ERROR;
PDO_VALIDATE_STMT;
PDO_LOG_STMT_ENTRY;
try {
SQLSRV_ASSERT( stmt != NULL, "pdo_sqlsrv_stmt_get_col_meta: pdo_stmt object was null" );
SQLSRV_ASSERT( Z_TYPE_P( return_value ) == IS_NULL, "Metadata already has value. Must be NULL." );
sqlsrv_stmt* driver_stmt = static_cast<sqlsrv_stmt*>( stmt->driver_data );
SQLSRV_ASSERT( driver_stmt != NULL, "pdo_sqlsrv_stmt_get_col_meta: stmt->driver_data was null");
// Based on PDOStatement::getColumnMeta API, this should return FALSE
// if the requested column does not exist in the result set, or if
// no result set exists. Thus, do not use SQLSRV_ASSERT, which causes
// the script to fail right away. Instead, log this warning if logging
// is enabled
if (colno < 0 || colno >= stmt->column_count || stmt->columns == NULL) {
LOG( SEV_WARNING, "Invalid column number %1!d!", colno );
return FAILURE;
}
// initialize the array to nothing, as PDO requires us to create it
array_init(return_value);
field_meta_data* core_meta_data;
// metadata should have been saved earlier
SQLSRV_ASSERT(colno < driver_stmt->current_meta_data.size(), "pdo_sqlsrv_stmt_get_col_meta: Metadata vector out of sync with column numbers");
core_meta_data = driver_stmt->current_meta_data[colno];
// add the following fields: flags, native_type, driver:decl_type, table
if (driver_stmt->data_classification) {
core_sqlsrv_sensitivity_metadata(driver_stmt);
// initialize the column data classification array
zval data_classification;
ZVAL_UNDEF(&data_classification);
array_init(&data_classification);
data_classification::fill_column_sensitivity_array(driver_stmt, (SQLSMALLINT)colno, &data_classification);
add_assoc_zval(return_value, "flags", &data_classification);
}
else {
add_assoc_long(return_value, "flags", 0);
}
// get the name of the data type
char field_type_name[SQL_SERVER_IDENT_SIZE_MAX] = {'\0'};
SQLSMALLINT out_buff_len;
SQLLEN not_used;
core::SQLColAttribute( driver_stmt, (SQLUSMALLINT) colno + 1, SQL_DESC_TYPE_NAME, field_type_name,
sizeof( field_type_name ), &out_buff_len, &not_used );
add_assoc_string( return_value, "sqlsrv:decl_type", field_type_name );
// get the PHP type of the column. The types returned here mirror the types returned by debug_zval_dump when
// given a variable of the same type. However, debug_zval_dump also gives the length of a string, and we only
// say string, since the length is given in another field of the metadata array.
long pdo_type = sql_type_to_pdo_type( core_meta_data->field_type );
switch( pdo_type ) {
case PDO_PARAM_STR:
{
//Declarations eliminate compiler warnings about string constant to char* conversions
std::string key = "native_type";
std::string str = "string";
add_assoc_string( return_value, &key[0], &str[0] );
}
break;
default:
DIE( "pdo_sqlsrv_stmt_get_col_data: Unknown PDO type returned" );
break;
}
// add the table name of the field. All the tests so far show this to always be "", but we adhere to the PDO spec
char table_name[SQL_SERVER_IDENT_SIZE_MAX] = {'\0'};
SQLLEN field_type_num;
core::SQLColAttribute( driver_stmt, (SQLUSMALLINT) colno + 1, SQL_DESC_TABLE_NAME, table_name, SQL_SERVER_IDENT_SIZE_MAX,
&out_buff_len, &field_type_num );
add_assoc_string( return_value, "table", table_name );
#if PHP_VERSION_ID < 80100
if( stmt->columns && stmt->columns[colno].param_type == PDO_PARAM_ZVAL ) {
add_assoc_long( return_value, "pdo_type", pdo_type );
}
#else
if (stmt->columns) {
add_assoc_long(return_value, "pdo_type", pdo_type);
}
#endif
}
catch( core::CoreException& ) {
zval_ptr_dtor(return_value);
return FAILURE;
}
catch(...) {
zval_ptr_dtor(return_value);
DIE( "pdo_sqlsrv_stmt_get_col_meta: Unknown exception occurred while retrieving metadata." );
}
return SUCCESS;
}
// pdo_sqlsrv_stmt_next_rowset
// Maps to PDOStatement::nextRowset.
// Move the cursor to the beginning of the next rowset in a multi-rowset result.
// Clears the field cache from the last row retrieved using pdo_sqlsrv_stmt_get_col_data.
// Calls core_sqlsrv_next_result using the core_stmt found within stmt->driver_data.
// If another result set is available, this function returns 1. Otherwise it returns 0.
// Parameters:
// stmt - PDOStatement object containing the result set.
// Return:
// 0 for failure, 1 for success.
int pdo_sqlsrv_stmt_next_rowset( _Inout_ pdo_stmt_t *stmt )
{
PDO_RESET_STMT_ERROR;
PDO_VALIDATE_STMT;
PDO_LOG_STMT_ENTRY;
try {
SQLSRV_ASSERT( stmt != NULL, "pdo_sqlsrv_stmt_next_rowset: pdo_stmt object was null" );
pdo_sqlsrv_stmt* driver_stmt = reinterpret_cast<pdo_sqlsrv_stmt*>( stmt->driver_data );
SQLSRV_ASSERT( driver_stmt != NULL, "pdo_sqlsrv_stmt_next_rowset: driver_data object was null" );
core_sqlsrv_next_result( static_cast<sqlsrv_stmt*>( stmt->driver_data ) );
// clear the current meta data since the new result will generate new meta data
driver_stmt->clean_up_results_metadata();
// if there are no more result sets, return that it failed.
if( driver_stmt->past_next_result_end == true ) {
return 0;
}
stmt->column_count = core::SQLNumResultCols( driver_stmt );
// return the row count regardless if there are any rows or not
stmt->row_count = core::SQLRowCount( driver_stmt );
driver_stmt->column_count = stmt->column_count;
driver_stmt->row_count = stmt->row_count;
}
catch( core::CoreException& ) {
return 0;
}
catch( ... ) {
DIE( "pdo_sqlsrv_stmt_next_rowset: Unknown exception occurred while advancing to the next result set." );
}
return 1;
}
// pdo_sqlsrv_stmt_param_hook
// Maps to PDOStatement::bindColumn.
// Called by PDO driver manager to bind a parameter or column.
// This function pulls several duties for binding parameters and columns.
// It takes an event as a parameter that explains what the function should do on
// behalf of a parameter or column. We only use one of these events,
// PDO_PARAM_EVT_EXEC_PRE, the remainder simply return.
// Paramters:
// stmt - PDO Statement object to bind a parameter.
// param - paramter to bind.
// event_type - Event to bind a parameter
// Return:
// Returns 0 for failure, 1 for success.
int pdo_sqlsrv_stmt_param_hook( _Inout_ pdo_stmt_t *stmt,
_Inout_ struct pdo_bound_param_data *param, _In_ enum pdo_param_event event_type)
{
PDO_RESET_STMT_ERROR;
try {
switch( event_type ) {
// since the param isn't reliable, we don't do anything here
case PDO_PARAM_EVT_ALLOC:
{
pdo_sqlsrv_stmt* driver_stmt = reinterpret_cast<pdo_sqlsrv_stmt*>(stmt->driver_data);
if (driver_stmt->conn->ce_option.enabled) {
if (driver_stmt->direct_query) {
THROW_PDO_ERROR(driver_stmt, PDO_SQLSRV_ERROR_CE_DIRECT_QUERY_UNSUPPORTED);
}
if (stmt->supports_placeholders == PDO_PLACEHOLDER_NONE) {
THROW_PDO_ERROR(driver_stmt, PDO_SQLSRV_ERROR_CE_EMULATE_PREPARE_UNSUPPORTED);
}
}
if (stmt->supports_placeholders == PDO_PLACEHOLDER_NONE && (param->param_type & PDO_PARAM_INPUT_OUTPUT)) {
THROW_PDO_ERROR(driver_stmt, PDO_SQLSRV_ERROR_EMULATE_INOUT_UNSUPPORTED);
}
}
break;
case PDO_PARAM_EVT_FREE:
break;
// bind the parameter in the core layer
case PDO_PARAM_EVT_EXEC_PRE:
{
PDO_VALIDATE_STMT;
PDO_LOG_STMT_ENTRY;
// skip column bindings
if( !param->is_param ) {
break;
}
sqlsrv_stmt* driver_stmt = reinterpret_cast<sqlsrv_stmt*>( stmt->driver_data );
SQLSRV_ASSERT( driver_stmt != NULL, "pdo_sqlsrv_stmt_param_hook: driver_data object was null" );
// prepare for binding parameters by flushing anything remaining in the result set
if( driver_stmt->executed && !driver_stmt->past_next_result_end ) {
while( driver_stmt->past_next_result_end == false ) {
core_sqlsrv_next_result( driver_stmt, false );
}
}
int direction = SQL_PARAM_INPUT;
SQLSMALLINT sql_type = SQL_UNKNOWN_TYPE;
SQLULEN column_size = SQLSRV_UNKNOWN_SIZE;
SQLSMALLINT decimal_digits = 0;
// determine the direction of the parameter. By default it's input, but if the user specifies a size
// that means they want output, and if they include the flag, then it's input/output.
// It's invalid to specify the input/output flag but not specify a length
CHECK_CUSTOM_ERROR( (param->param_type & PDO_PARAM_INPUT_OUTPUT) && (param->max_value_len == 0),
driver_stmt, PDO_SQLSRV_ERROR_INVALID_PARAM_DIRECTION, param->paramno + 1 ) {
throw pdo::PDOException();
}
// if the parameter is output or input/output, translate the type between the PDO::PARAM_* constant
// and the SQLSRV_PHPTYPE_* constant
// vso 2829: derive the pdo_type for input/output parameter as well
// also check if the user has specified PARAM_STR_NATL or PARAM_STR_CHAR for string params
int pdo_type = param->param_type;
if( param->max_value_len > 0 || param->max_value_len == SQLSRV_DEFAULT_SIZE ) {
if( param->param_type & PDO_PARAM_INPUT_OUTPUT ) {
direction = SQL_PARAM_INPUT_OUTPUT;
pdo_type = param->param_type & ~PDO_PARAM_INPUT_OUTPUT;
}
else {
direction = SQL_PARAM_OUTPUT;
}
}
// check if the user has specified the character set to use, take it off but ignore
#if PHP_VERSION_ID >= 70200
if ((pdo_type & PDO_PARAM_STR_NATL) == PDO_PARAM_STR_NATL) {
pdo_type = pdo_type & ~PDO_PARAM_STR_NATL;
LOG(SEV_NOTICE, "PHP Extended String type PDO_PARAM_STR_NATL set but is ignored.");
}
if ((pdo_type & PDO_PARAM_STR_CHAR) == PDO_PARAM_STR_CHAR) {
pdo_type = pdo_type & ~PDO_PARAM_STR_CHAR;
LOG(SEV_NOTICE, "PHP Extended String type PDO_PARAM_STR_CHAR set but is ignored.");
}
#endif
// if the parameter is output or input/output, translate the type between the PDO::PARAM_* constant
// and the SQLSRV_PHPTYPE_* constant
SQLSRV_PHPTYPE php_out_type = SQLSRV_PHPTYPE_INVALID;
switch (pdo_type) {
case PDO_PARAM_BOOL:
case PDO_PARAM_INT:
php_out_type = SQLSRV_PHPTYPE_INT;
break;
case PDO_PARAM_STR:
php_out_type = SQLSRV_PHPTYPE_STRING;
break;
// when the user states PDO::PARAM_NULL, they mean send a null no matter what the variable is
// since the core layer keys off the zval type, we substitute a null for what they gave us
case PDO_PARAM_NULL:
{
zval null_zval;
php_out_type = SQLSRV_PHPTYPE_NULL;
ZVAL_NULL( &null_zval );
zval_ptr_dtor( &param->parameter );
param->parameter = null_zval;
break;
}
case PDO_PARAM_LOB:
php_out_type = SQLSRV_PHPTYPE_STREAM;
break;
case PDO_PARAM_STMT:
THROW_PDO_ERROR( driver_stmt, PDO_SQLSRV_ERROR_PDO_STMT_UNSUPPORTED );
break;
default:
SQLSRV_ASSERT( false, "Unknown PDO::PARAM_* constant given." );
break;
}
// set the column size parameter for bind_param if we are expecting something back
if( direction != SQL_PARAM_INPUT ) {
switch( php_out_type ) {
case SQLSRV_PHPTYPE_NULL:
case SQLSRV_PHPTYPE_STREAM:
{
zval *zv = &param->parameter;
if (Z_ISREF_P(zv)) {
ZVAL_DEREF(zv);
}
// Table-valued parameters are input-only
CHECK_CUSTOM_ERROR(Z_TYPE_P(zv) == IS_ARRAY, driver_stmt, SQLSRV_ERROR_TVP_INPUT_PARAM_ONLY) {
throw pdo::PDOException();
}
// For other types, simply throw the following error
THROW_PDO_ERROR(driver_stmt, PDO_SQLSRV_ERROR_INVALID_OUTPUT_PARAM_TYPE);
break;
}
case SQLSRV_PHPTYPE_INT:
column_size = SQLSRV_UNKNOWN_SIZE;
break;
case SQLSRV_PHPTYPE_STRING:
{
CHECK_CUSTOM_ERROR( param->max_value_len <= 0, driver_stmt,
PDO_SQLSRV_ERROR_INVALID_OUTPUT_STRING_SIZE, param->paramno + 1 ) {
throw pdo::PDOException();
}
column_size = param->max_value_len;
break;
}
default:
SQLSRV_ASSERT( false, "Invalid PHP type for output parameter. Should have been caught already." );
break;
}
}
// block all objects from being bound as input or input/output parameters since there is a
// weird case:
// $obj = date_create();
// $s->bindParam( n, $obj, PDO::PARAM_INT ); // anything different than PDO::PARAM_STR
// that succeeds since the core layer implements DateTime object handling for the sqlsrv
// 2.0 driver. To be consistent and avoid surprises of one object type working and others
// not, we block all objects here.
CHECK_CUSTOM_ERROR( direction != SQL_PARAM_OUTPUT && Z_TYPE( param->parameter ) == IS_OBJECT,
driver_stmt, SQLSRV_ERROR_INVALID_PARAMETER_PHPTYPE, param->paramno + 1 ) {
throw pdo::PDOException();
}
// the encoding by default is that set on the statement
SQLSRV_ENCODING encoding = driver_stmt->encoding();
// if the statement's encoding is the default, then use the one on the connection
if( encoding == SQLSRV_ENCODING_DEFAULT ) {
encoding = driver_stmt->conn->encoding();
}
// Beginning with PHP7.2 the user can specify whether to use PDO_PARAM_STR_CHAR or PDO_PARAM_STR_NATL
// But this extended type will be ignored in real prepared statements, so the encoding deliberately
// set in the statement or driver options will still take precedence
if( !Z_ISUNDEF(param->driver_params) ) {
CHECK_CUSTOM_ERROR( Z_TYPE( param->driver_params ) != IS_LONG, driver_stmt,
PDO_SQLSRV_ERROR_INVALID_DRIVER_PARAM ) {
throw pdo::PDOException();
}
CHECK_CUSTOM_ERROR( pdo_type != PDO_PARAM_STR && pdo_type != PDO_PARAM_LOB, driver_stmt,
PDO_SQLSRV_ERROR_INVALID_DRIVER_PARAM_TYPE, param->paramno + 1 ) {
throw pdo::PDOException();
}
encoding = static_cast<SQLSRV_ENCODING>( Z_LVAL( param->driver_params ));
switch( encoding ) {
case SQLSRV_ENCODING_SYSTEM:
case SQLSRV_ENCODING_BINARY:
case SQLSRV_ENCODING_UTF8:
break;
default:
THROW_PDO_ERROR( driver_stmt, PDO_SQLSRV_ERROR_INVALID_DRIVER_PARAM_ENCODING,
param->paramno + 1 );
break;
}
}
// and bind the parameter
core_sqlsrv_bind_param( driver_stmt, static_cast<SQLUSMALLINT>( param->paramno ), direction, &(param->parameter) , php_out_type, encoding,
sql_type, column_size, decimal_digits);
}
break;
// undo any work done by the core layer after the statement is executed
case PDO_PARAM_EVT_EXEC_POST:
{
PDO_VALIDATE_STMT;
PDO_LOG_STMT_ENTRY;
}
break;
case PDO_PARAM_EVT_FETCH_PRE:
break;
case PDO_PARAM_EVT_FETCH_POST:
break;
case PDO_PARAM_EVT_NORMALIZE:
break;
default:
DIE( "pdo_sqlsrv_stmt_param_hook: Unknown event type" );
break;
}
}
catch( core::CoreException& ) {
return 0;
}
catch( ... ) {
DIE( "pdo_sqlsrv_stmt_param_hook: Unknown exception" );
}
return 1;
}
// Returns a sqlsrv_phptype for a given SQL Server data type.
sqlsrv_phptype pdo_sqlsrv_stmt::sql_type_to_php_type( _In_ SQLINTEGER sql_type, _In_ SQLUINTEGER size, _In_ bool prefer_string_over_stream )
{
sqlsrv_phptype sqlsrv_phptype;
int local_encoding = this->encoding();
// if the encoding on the connection changed
if( this->encoding() == SQLSRV_ENCODING_DEFAULT ) {
local_encoding = conn->encoding();
SQLSRV_ASSERT( conn->encoding() != SQLSRV_ENCODING_DEFAULT || conn->encoding() == SQLSRV_ENCODING_INVALID,
"Invalid encoding on the connection. Must not be invalid or default." );
}
sqlsrv_phptype.typeinfo.encoding = local_encoding;
switch( sql_type ) {
case SQL_BIT:
case SQL_INTEGER:
case SQL_SMALLINT:
case SQL_TINYINT:
if ( this->fetch_numeric ) {
sqlsrv_phptype.typeinfo.type = SQLSRV_PHPTYPE_INT;
}
else {
sqlsrv_phptype.typeinfo.type = SQLSRV_PHPTYPE_STRING;
sqlsrv_phptype.typeinfo.encoding = SQLSRV_ENCODING_CHAR;
}
break;
case SQL_FLOAT:
case SQL_REAL:
if ( this->fetch_numeric ) {
sqlsrv_phptype.typeinfo.type = SQLSRV_PHPTYPE_FLOAT;
}
else {
sqlsrv_phptype.typeinfo.type = SQLSRV_PHPTYPE_STRING;
sqlsrv_phptype.typeinfo.encoding = SQLSRV_ENCODING_CHAR;
}
break;
case SQL_TYPE_DATE:
case SQL_SS_TIMESTAMPOFFSET:
case SQL_SS_TIME2:
case SQL_TYPE_TIMESTAMP:
if ( this->fetch_datetime ) {
sqlsrv_phptype.typeinfo.type = SQLSRV_PHPTYPE_DATETIME;
}
else {
sqlsrv_phptype.typeinfo.type = SQLSRV_PHPTYPE_STRING;
}
break;
case SQL_BIGINT:
case SQL_DECIMAL:
case SQL_NUMERIC:
sqlsrv_phptype.typeinfo.type = SQLSRV_PHPTYPE_STRING;
sqlsrv_phptype.typeinfo.encoding = SQLSRV_ENCODING_CHAR;
break;
case SQL_CHAR:
case SQL_GUID:
case SQL_WCHAR:
case SQL_VARCHAR:
case SQL_WVARCHAR:
case SQL_LONGVARCHAR:
case SQL_WLONGVARCHAR:
case SQL_SS_XML:
case SQL_SS_VARIANT:
sqlsrv_phptype.typeinfo.type = SQLSRV_PHPTYPE_STRING;
break;
case SQL_BINARY:
case SQL_LONGVARBINARY:
case SQL_VARBINARY:
case SQL_SS_UDT:
sqlsrv_phptype.typeinfo.type = SQLSRV_PHPTYPE_STRING;
sqlsrv_phptype.typeinfo.encoding = SQLSRV_ENCODING_BINARY;
break;
default:
sqlsrv_phptype.typeinfo.type = SQLSRV_PHPTYPE_INVALID;
sqlsrv_phptype.typeinfo.encoding = SQLSRV_ENCODING_INVALID;
break;
}
return sqlsrv_phptype;
}
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