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ibm_statement.c
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/*
+----------------------------------------------------------------------+
| (C) Copyright IBM Corporation 2006. |
+----------------------------------------------------------------------+
| |
| Licensed under the Apache License, Version 2.0 (the "License"); you |
| may not use this file except in compliance with the License. You may |
| obtain a copy of the License at |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or |
| implied. See the License for the specific language governing |
| permissions and limitations under the License. |
+----------------------------------------------------------------------+
| Authors: Rick McGuire, Dan Scott, Krishna Raman, Kellen Bombardier, |
| Ambrish Bhargava, Rahul Priyadarshi |
+----------------------------------------------------------------------+
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "php.h"
#include "php_ini.h"
#include "ext/standard/info.h"
#include "pdo/php_pdo.h"
#include "pdo/php_pdo_driver.h"
#include "php_pdo_ibm.h"
#include "php_pdo_ibm_int.h"
#ifdef PASE
# define SQL_LEN_DATA_AT_EXEC(length) length
#else
# if !defined(SQL_LEN_DATA_AT_EXEC) && !defined(SQL_LEN_DATA_AT_EXEC_OFFSET)
# define SQL_LEN_DATA_AT_EXEC_OFFSET (-100)
# define SQL_LEN_DATA_AT_EXEC(length) (-(length)+SQL_LEN_DATA_AT_EXEC_OFFSET)
# endif
#endif
struct lob_stream_data
{
stmt_handle *stmt_res;
pdo_stmt_t *stmt;
int colno;
zval dbh; /* for holding a ref to the statement */
};
#ifdef PASE
static int get_lob_length(pdo_stmt_t *stmt, column_data *col_res)
{
SQLRETURN rc = 0;
SQLHANDLE new_hstmt;
conn_handle *conn_res = (conn_handle *)stmt->dbh->driver_data;
rc = SQLAllocHandle(SQL_HANDLE_STMT, conn_res->hdbc, &new_hstmt);
if (rc != SQL_SUCCESS) {
return rc;
}
rc = SQLGetLength((SQLHSTMT)new_hstmt,
col_res->loc_type,
col_res->lob_loc,
&col_res->lob_data_length,
&col_res->loc_ind);
check_stmt_error(rc, "SQLGetLength");
if (rc != SQL_SUCCESS) {
col_res->lob_data_length=0;
}
SQLFreeHandle(SQL_HANDLE_STMT, new_hstmt);
return rc;
}
static int get_lob_substring(pdo_stmt_t *stmt, column_data *col_res,
SQLSMALLINT ctype, SQLINTEGER *out_length)
{
SQLRETURN rc = 0;
SQLHANDLE new_hstmt;
conn_handle *conn_res = (conn_handle *)stmt->dbh->driver_data;
*out_length=0;
col_res->lob_data_offset = 0;
col_res->lob_data[col_res->lob_data_length]='\0';
rc = SQLAllocHandle(SQL_HANDLE_STMT, conn_res->hdbc, &new_hstmt);
if (rc != SQL_SUCCESS) {
return rc;
}
rc = SQLGetSubString(
(SQLHSTMT)new_hstmt,
col_res->loc_type,
col_res->lob_loc,
1,
col_res->lob_data_length,
ctype,
col_res->lob_data,
col_res->lob_data_length+1,
out_length,
&col_res->loc_ind);
check_stmt_error(rc, "SQLGetSubString");
col_res->lob_data[col_res->lob_data_length]='\0';
SQLFreeHandle(SQL_HANDLE_STMT, new_hstmt);
return rc;
}
#endif
STREAM_RETURN_TYPE lob_stream_read(php_stream *stream, char *buf, size_t count)
{
SQLINTEGER readBytes = 0;
struct lob_stream_data *data = stream->abstract;
column_data *col_res = &data->stmt_res->columns[data->colno];
stmt_handle *stmt_res = data->stmt_res;
pdo_stmt_t *stmt = data->stmt;
int ctype = 0;
SQLRETURN rc = 0;
long sLength;
switch (col_res->data_type) {
case SQL_LONGVARBINARY:
case SQL_VARBINARY:
case SQL_BINARY:
case SQL_BLOB:
#ifndef PASE /* i5os string type required for the ascii->ebcdic conversion */
case SQL_CLOB:
#endif /* PASE */
case SQL_XML:
ctype = SQL_C_BINARY;
break;
default:
ctype = SQL_C_CHAR;
break;
}
#ifdef PASE
if (buf == NULL) {
rc = get_lob_length(stmt, col_res);
if (rc != SQL_ERROR && col_res->lob_data_length > 0) {
if (col_res->lob_data) {
col_res->lob_data = erealloc(col_res->lob_data, col_res->lob_data_length+1);
} else {
col_res->lob_data = emalloc(col_res->lob_data_length+1);
}
rc = get_lob_substring(stmt, col_res, ctype, &readBytes);
}
} else {
readBytes = MIN(count, col_res->lob_data_length - col_res->lob_data_offset);
if (readBytes > 0) {
memcpy( buf, col_res->lob_data + col_res->lob_data_offset, readBytes);
col_res->lob_data_offset +=readBytes;
}
}
if (readBytes <= 0) {
readBytes = -1;
if (buf != NULL) {
/* EOF reached */
stream->eof = 1;
}
}
#else
rc = SQLGetData(stmt_res->hstmt, data->colno + 1, ctype, buf, count, &readBytes);
/* custom error handling for possible ssize_t */
if (rc == SQL_ERROR) {
RAISE_STMT_ERROR("SQLGetData");
return (STREAM_RETURN_TYPE)-1;
}
if (readBytes == -1) { /*For NULL CLOB/BLOB values */
return (STREAM_RETURN_TYPE) readBytes;
}
if (readBytes > count) {
if (col_res->data_type == SQL_LONGVARCHAR) { /*Dont return the NULL at end of CLOB buffer */
readBytes = count - 1;
} else {
readBytes = count;
}
}
#endif
return (STREAM_RETURN_TYPE) readBytes;
}
STREAM_RETURN_TYPE lob_stream_write(php_stream *stream, const char *buf, size_t count)
{
return 0;
}
int lob_stream_flush(php_stream *stream)
{
return 0;
}
int lob_stream_close(php_stream *stream, int close_handle)
{
struct lob_stream_data *data = stream->abstract;
pdo_stmt_t *stmt = data->stmt;
zend_object *obj = &stmt->std;
if (Z_ISREF(data->dbh)) {
zval_ptr_dtor(&data->dbh); /* should decref */
GC_DELREF(obj);
}
efree(data);
return 0;
}
php_stream_ops lob_stream_ops = {
lob_stream_write, /* Write */
lob_stream_read, /* Read */
lob_stream_close, /* Close */
lob_stream_flush, /* Flush */
"ibm PDO Lob stream",
NULL, /* Seek */
NULL, /* GetS */
NULL, /* Cast */
NULL /* Stat */
};
php_stream* create_lob_stream( pdo_stmt_t *stmt , stmt_handle *stmt_res , int colno )
{
struct lob_stream_data *data;
column_data *col_res;
php_stream *retval;
data = emalloc(sizeof(struct lob_stream_data));
data->stmt_res = stmt_res;
data->stmt = stmt;
data->colno = colno;
col_res = &data->stmt_res->columns[data->colno];
retval = (php_stream *) php_stream_alloc(&lob_stream_ops, data, NULL, "r");
/* Find out if the column contains NULL data */
if (lob_stream_read(retval, NULL, 0) == SQL_NULL_DATA) {
/* Throw away this stream immediately */
ZVAL_NULL(&data->dbh);
php_stream_close(retval);
return NULL;
} else {
/* Hold a ref to the PDOStatement, or it gets deallocated */
ZVAL_COPY_VALUE(&data->dbh, &stmt->database_object_handle);
Z_ADDREF(data->dbh);
zend_object *obj = &stmt->std;
GC_ADDREF(obj);
return retval;
}
}
/*
* Clear up our column descriptors. This is done either from
* the statement constructors or whenever we traverse from one
* result set to the next.
*/
static void stmt_free_column_descriptors(pdo_stmt_t *stmt)
{
stmt_handle *stmt_res = (stmt_handle *) stmt->driver_data;
if (stmt_res->columns != NULL) {
int i;
/* see if any of the columns have attached storage too. */
for (i = 0; i < stmt->column_count; i++) {
/*
* Was this a string form? We have an allocated string
* buffer that also needs releasing.
*/
if (stmt_res->columns[i].returned_type == PDO_PARAM_STR) {
efree(stmt_res->columns[i].data.str_val);
}
if (stmt_res->columns[i].returned_type == PDO_PARAM_LOB && (stmt_res->columns[i].lob_data != NULL)) {
efree(stmt_res->columns[i].lob_data);
}
}
/* free the entire column list. */
efree(stmt_res->columns);
stmt_res->columns = NULL;
}
}
/*
* Cleanup any driver-allocated control blocks attached to a statement
* instance. This cleans up the driver_data control block, as
* well as any temporary allocations used during execution.
*/
void stmt_cleanup(pdo_stmt_t *stmt)
{
stmt_handle *stmt_res = (stmt_handle *) stmt->driver_data;
if (stmt_res != NULL) {
if (stmt_res->converted_statement != NULL) {
#if PHP_8_1_OR_HIGHER
zend_string_release(stmt_res->converted_statement);
#else
efree(stmt_res->converted_statement);
#endif
}
if (stmt_res->lob_buffer != NULL) {
stmt_res->lob_buffer = NULL;
}
/* free any descriptors we're keeping active */
stmt_free_column_descriptors(stmt);
efree(stmt_res);
}
stmt->driver_data = NULL;
}
/* get the parameter description information for a positional bound parameter. */
static int stmt_get_parameter_info(pdo_stmt_t * stmt, struct pdo_bound_param_data *param)
{
param_node *param_res = (param_node *) param->driver_data;
stmt_handle *stmt_res = NULL;
int rc = 0;
/* do we have the parameter information yet? */
if (param_res == NULL) {
/* allocate a new one and attach to the PDO param structure */
param_res = (param_node *) emalloc(sizeof(param_node));
check_stmt_allocation(param_res, "stmt_get_parameter",
"Unable to allocate parameter driver data");
/* get the statement specifics */
stmt_res = (stmt_handle *) stmt->driver_data;
/* this is only used if a string is interned for an OUT */
param_res->tmp_binding_buffer = NULL;
/*
* NB: The PDO parameter numbers are origin zero, but the
* SQLDescribeParam() ones start with 1.
*/
rc = SQLDescribeParam((SQLHSTMT)stmt_res->hstmt, (SQLUSMALLINT)param->paramno + 1, ¶m_res->data_type,
¶m_res->param_size, ¶m_res->scale, ¶m_res->nullable);
/* Free the memory if SQLDescribeParam failed */
if (rc == SQL_ERROR) {
efree(param_res);
param_res = NULL;
}
check_stmt_error(rc, "SQLDescribeParam");
/* only attach this if we succeed */
param->driver_data = param_res;
/*
* but see if we need to alter this for binary forms or
* can optimize numerics a little.
*/
switch (param_res->data_type) {
/*
* The binary forms need to be transferred as binary
* data, not as char data. */
case SQL_BINARY:
case SQL_BLOB:
#ifndef PASE /* i5/OS CLOB is char not binary (default) */
case SQL_CLOB:
#endif
case SQL_XML:
case SQL_VARBINARY:
case SQL_LONGVARBINARY:
param_res->ctype = SQL_C_BINARY;
break;
/*
* Numeric forms we can map directly to a long
* int value
*/
case SQL_SMALLINT:
case SQL_INTEGER:
param_res->ctype = SQL_C_LONG;
break;
/* everything else will transfer as character */
default:
/* by default, we transfer as character data */
param_res->ctype = SQL_C_CHAR;
break;
}
}
return TRUE;
}
static int db2_inout_parm_numeric(param_node *param_res) {
/* need character to number padding */
switch ( param_res->data_type ) {
case SQL_SMALLINT:
case SQL_INTEGER:
case SQL_REAL:
case SQL_FLOAT:
case SQL_DOUBLE:
case SQL_DECFLOAT:
case SQL_BIGINT:
case SQL_DECIMAL:
case SQL_NUMERIC:
return 1;
default:
break;
}
return 0;
}
static int db2_inout_parm_pad_len(param_node *param_res) {
/* length full char pad for number expanded */
switch ( param_res->data_type ) {
case SQL_REAL:
case SQL_FLOAT:
case SQL_DOUBLE:
case SQL_DECFLOAT:
case SQL_BIGINT:
return 20;
break;
case SQL_DECIMAL:
return param_res->param_size * 2 + 1;
break;
case SQL_NUMERIC:
/* length full char pad same as SQL column length */
default:
break;
}
return param_res->param_size;
}
static void db2_inout_parm_pad_data(param_node *param_res, struct pdo_bound_param_data *curr) {
char *front = NULL;
char *back = NULL;
char *here = NULL;
int isNeg = 0;
int isNum = 0;
int len = 0;
int need = 0;
#ifdef PASE /* i5/OS - RPG, COBOL, expect space pad */
char pad = 0x20;
#else /* LUW - c programming null pad (0) */
char pad = 0x00;
#endif /* PASE */
zval *parameter;
if (Z_ISREF(curr->parameter)) {
parameter = Z_REFVAL(curr->parameter);
} else {
parameter = &curr->parameter;
}
len = Z_STRLEN_P(parameter);
front = Z_STRVAL_P(parameter);
here=back= Z_STRVAL_P(parameter) + len - 1;
/*
* HACK: Purge the buffer of any leftovers, but keep a copy of what we
* need from it we can blit back in. Otherwise, we tend to get some
* garbage from previous uses that can get used. (CB 20200903)
*/
char *tmp_buf = estrdup(front);
if (tmp_buf) {
memset(front, 0, len);
strncpy(front, tmp_buf, strlen(tmp_buf));
efree(tmp_buf);
}
/*
* character cast to number pad
* Example:
* BIGINT<implicit>CHAR works consistently if 0x30 pad left,
* '2' becomes '000000000000000000002'
*/
switch ( param_res->data_type ) {
case SQL_SMALLINT:
case SQL_INTEGER:
case SQL_REAL:
case SQL_FLOAT:
case SQL_DOUBLE:
case SQL_DECFLOAT:
case SQL_BIGINT:
case SQL_DECIMAL:
case SQL_NUMERIC:
for (;here>=front;here--) {
if (*here == '-') {
isNeg = 1;
}
if ((*here>='0' && *here<='9') || *here == '.') {
isNum = 1;
*back = *here;
back--;
} else if (isNum) {
*back = '0';
back--;
}
}
for (;back>=front;back--) {
*back = '0';
}
if (isNeg==1) {
*front = '-';
back--;
}
break;
default:
/*
* character pad (platform dependent)
* IBM i (PASE):
* 'hi' becomes 'hi' + 0x2020202020(00)
* LUW:
* 'hi' becomes 'hi' + 0x0000000000(00)
*/
len = strlen(front);
here = front + len;
back--;
for (;back>=here;back--) {
*back = pad;
}
break;
}
}
static void db2_inout_parm_pad_return(param_node *param_res, struct pdo_bound_param_data *curr) {
char *front = NULL;
char *back = NULL;
char *here = NULL;
int len = param_res->transfer_length;
zval *parameter;
if (Z_ISREF(curr->parameter)) {
parameter = Z_REFVAL(curr->parameter);
} else {
parameter = &curr->parameter;
}
front = Z_STRVAL_P(parameter);
here=back= Z_STRVAL_P(parameter) + len - 1;
/* trim trailing 'junk' */
for (;back>=front;back--) {
#ifdef PASE /* i5/OS - also annoying trailing ebcdic space (0x40) */
if (*back == 0x00 || *back == 0x20 || *back == 0x40)
#else /* LUW -- assume trim also wanted */
if (*back == 0x00 || *back == 0x20)
#endif /* PASE */
{
param_res->transfer_length--;
*back = '0';
} else {
break;
}
}
}
/*
* Bind a statement parameter to the PHP value supplying or receiving the
* parameter data.
*/
int stmt_bind_parameter(pdo_stmt_t *stmt, struct pdo_bound_param_data *curr)
{
int rc, is_num = 0, is_null = 0, is_empty = 0;
stmt_handle *stmt_res = (stmt_handle *) stmt->driver_data;
param_node *param_res = NULL;
SQLSMALLINT inputOutputType = 0;
SQLSMALLINT switchInputOutputType = 0;
int origlen = 0;
void *data_buf = NULL;
int how_to_handle_empty_string = 0;
zval *parameter;
if (Z_ISREF(curr->parameter)) {
parameter = Z_REFVAL(curr->parameter);
} else {
parameter = &curr->parameter;
}
/* make sure we have current description information. */
if (stmt_get_parameter_info(stmt, curr) == FALSE) {
return FALSE;
}
param_res = (param_node *) curr->driver_data;
/*
* Now figure out the parameter type so we can tell the database code
* how to handle this.
* this is rare, really only used for stored procedures.
*/
if ((unsigned)((unsigned)curr->param_type & (unsigned)PDO_PARAM_INPUT_OUTPUT) == (unsigned)PDO_PARAM_INPUT_OUTPUT) {
inputOutputType = SQL_PARAM_INPUT_OUTPUT;
}
/*
* If this is a non-positive length, we can't assign a value,
* so this is by definition an INPUT param.
*/
else if (curr->max_value_len <= 0) {
inputOutputType = SQL_PARAM_INPUT;
} else {
/* everything else is output. */
inputOutputType = SQL_PARAM_OUTPUT;
}
/* IS_NULL special handling (before any alterations) */
if (Z_TYPE_P(parameter) == IS_NULL) {
is_null = 1;
}
/* IS_EMPTY special handling (before any alterations) */
if (Z_TYPE_P(parameter) == IS_STRING && !Z_STRLEN_P(parameter)) {
is_empty = 1;
}
/*
* Now do the actual binding, which is controlled by the
* PDO supplied type.
*/
switch (PDO_PARAM_TYPE(curr->param_type)) {
/* not implemented yet */
case PDO_PARAM_STMT:
RAISE_IBM_STMT_ERROR("IM001", "param_hook",
"Driver does not support statement parameters");
return FALSE;
/* this is a long value for PHP (or user forced) */
case PDO_PARAM_INT:
/*
* If the parameter type is a numeric type,
* we'll bind this directly
* (param_res->ctype db2 provided field description)
*/
if (param_res->ctype == SQL_C_LONG) {
/* promote to null */
if (is_null || is_empty) {
is_null = 1;
} else {
convert_to_long(parameter);
data_buf = &Z_LVAL_P(parameter);
/*
* SQL_BIGINT works as the C-side type
* and will bind as a 64-bit integer,
* because XPF long is 32-bit and PASE
* long is 64-bit (under 64-bit PASE).
*/
rc = SQLBindParameter(stmt_res->hstmt,
curr->paramno + 1,
inputOutputType,
#if defined(PASE) && defined(__LP64__)
SQL_BIGINT,
#else
SQL_C_LONG,
#endif
param_res->data_type,
param_res->param_size,
param_res->scale,
data_buf,
0,
NULL);
check_stmt_error(rc, "SQLBindParameter");
return TRUE;
}
}
/*
* NOTE: We fall through from above if there is a
* type mismatch.
*/
/* a string value (very common) */
case PDO_PARAM_BOOL:
case PDO_PARAM_STR:
/*
* SQL_PARAM_INPUT -- null remain untouched (read)
* non-null convert string (update)
* SQL_PARAM_OUTPUT -- force big enough out buffer (write)
* SQL_PARAM_INPUT_OUTPUT -- force big enough out buffer (write)
*/
switch(inputOutputType) {
case SQL_PARAM_INPUT:
/*
* IS_NULL special handling
* php variable remain untouched (goal)
*/
if (is_null) {
data_buf = &Z_LVAL_P(parameter);
break;
}
/* fall through to force string */
case SQL_PARAM_INPUT_OUTPUT:
case SQL_PARAM_OUTPUT:
default:
/* force this to be a real string value */
param_res->ctype = SQL_C_CHAR;
convert_to_string(parameter);
/* buffer and size before alterations */
data_buf = Z_STRVAL_P(parameter);
origlen = Z_STRLEN_P(parameter);
/*
* The transfer length to zero now...this
* gets updated at EXEC_PRE time.
*/
param_res->transfer_length = 0;
/*
* empty string is common ($var=''),
* but what to do with DB2 implicit CAST error
* inserting to a database 'numeric' field
* (CREATE TABLE animals (id INTEGER))?
*/
how_to_handle_empty_string = 2;
if (inputOutputType == SQL_PARAM_INPUT && !is_null && !origlen) {
switch (how_to_handle_empty_string) {
case 1:
/*
* tough luck! Let DB2 throw a CAST error
* (cruel database expert)
*/
break;
case 2:
/*
* empty string to promote to null
* (kind database expert)
*/
switchInputOutputType = db2_inout_parm_numeric(param_res);
if (switchInputOutputType) {
switchInputOutputType = 0;
is_null = 1;
}
break;
case 3:
default:
/*
* empty string to promote to zero
* (simple mutable php)
*/
switchInputOutputType = db2_inout_parm_numeric(param_res);
if (switchInputOutputType) {
inputOutputType = SQL_PARAM_OUTPUT;
curr->max_value_len = 1;
}
break;
}
}
break;
} /* switch */
/*
* SQL_PARAM_INPUT -- any size buffer
* SQL_PARAM_OUTPUT -- need max size buffer
* SQL_PARAM_INPUT_OUTPUT -- need max size buffer
*/
switch (inputOutputType) {
case SQL_PARAM_INPUT:
/* IS_NULL special handling */
if (is_null) {
switchInputOutputType = db2_inout_parm_numeric(param_res);
if (switchInputOutputType) {
param_res->ctype = SQL_C_LONG;
switchInputOutputType = 0;
}
curr->max_value_len = 0;
param_res->transfer_length = SQL_NULL_DATA;
rc = SQLBindParameter(stmt_res->hstmt,
curr->paramno + 1,
inputOutputType,
param_res->ctype,
param_res->data_type,
param_res->param_size,
param_res->scale,
data_buf,
curr->max_value_len <=
0 ? 0 : curr->max_value_len,
¶m_res->transfer_length);
check_stmt_error(rc, "SQLBindParameter");
return TRUE;
}
break;
case SQL_PARAM_INPUT_OUTPUT:
case SQL_PARAM_OUTPUT:
default:
/*
* IS_INTERNED() macro to check if a given char* is interned or regular string
* each string (or atom) is allocated once and never changed (immutable)
* aka, not useful for INOUT and OUT paramters obviously
*/
if (IS_INTERNED(Z_STR_P(parameter))) {
Z_STR_P(parameter) = zend_string_init(Z_STRVAL_P(parameter), Z_STRLEN_P(parameter), 0);
/* free at event hook */
param_res->tmp_binding_buffer = (parameter);
}
/*
* Now we need to make sure the string buffer
* is large enough to receive a new value if
* this is an output or in/out parameter
*/
curr->max_value_len = db2_inout_parm_pad_len(param_res);
if (curr->max_value_len > Z_STRLEN_P(parameter)) {
/* reallocate this to the new size */
Z_STR_P(parameter) = zend_string_extend(Z_STR_P(parameter), curr->max_value_len, 0);
check_stmt_allocation(Z_STRVAL_P(parameter),
"stmt_bind_parameter",
"Unable to allocate bound parameter");
}
/* correct format of string data implicit CAST (if needed) */
db2_inout_parm_pad_data(param_res, curr);
/* switch type for CAST help (kind zero way) */
if (switchInputOutputType) {
inputOutputType = SQL_PARAM_INPUT;
}
break;
} /* switch */
/* data buf (after alterations) */
data_buf = Z_STRVAL_P(parameter);
/* GH-12: Set +1 to avoid a possible CHAR(0). Db2i
* reacts violently (-902) to it. zend_string is
* null terminated, so it should be safe.
*/
param_res->param_size = Z_STRLEN_P(parameter) + 1;
/* binary */
switch(param_res->data_type) {
case SQL_BINARY:
case SQL_LONGVARBINARY:
case SQL_VARBINARY:
case SQL_BLOB:
param_res->ctype = SQL_C_BINARY;
break;
default:
param_res->ctype = SQL_C_CHAR;
break;
}
/* bind as char */
rc = SQLBindParameter(stmt_res->hstmt,
curr->paramno + 1,
inputOutputType,
param_res->ctype,
param_res->data_type,
param_res->param_size,
param_res->scale,
data_buf,
curr->max_value_len <=
0 ? 0 : curr->max_value_len,
¶m_res->transfer_length);
check_stmt_error(rc, "SQLBindParameter");
return TRUE;
/*
* This is either a string, or, if the length is zero,
* then this is a pointer to a PHP stream.
*/
case PDO_PARAM_LOB:
if (inputOutputType != SQL_PARAM_INPUT) {
inputOutputType = SQL_PARAM_INPUT;
}
/* have we bound a LOB to a long type for some reason? */
if (param_res->ctype == SQL_C_LONG) {
/* transfer this as character data. */
param_res->ctype = SQL_C_CHAR;
}
/*
* CLOB, DBCLOB = CHAR
* BLOB, XML, other = BINARY
*/
switch(param_res->data_type) {
case SQL_CLOB:
#ifdef PASE /* i5/OS - include DBCLOB */
case SQL_DBCLOB:
#endif /* PASE */
param_res->ctype = SQL_C_CHAR;
break;
default:
param_res->ctype = SQL_C_BINARY;
break;
}
/* indicate we're going to transfer the data at exec time. */
param_res->transfer_length = SQL_DATA_AT_EXEC;
data_buf = curr;
#ifdef PASE /* i5/OS - to cause a conversion to ebcdic */
if (Z_TYPE_P(parameter) != IS_RESOURCE) {
param_res->transfer_length = SQL_LEN_DATA_AT_EXEC(Z_STRLEN_P(parameter));
/* get the pointer to the string data */
data_buf = Z_STRVAL_P(parameter);
}
#endif /* PASE */
/*
* We can't bind LOBs at this point...we process all
* of this at execute time. However, we set the value
* data to the PDO binding control block and set the
* SQL_DATA_AT_EXEC value to cause it to prompt us for
* the data at execute time. The pointer is recoverable
* at that time by using SQLParamData(), and we can
* then process the request.
*/
rc = SQLBindParameter(stmt_res->hstmt, curr->paramno + 1,
inputOutputType, param_res->ctype,
param_res->data_type,
param_res->param_size, param_res->scale,
data_buf,
4096,
¶m_res->transfer_length);
check_stmt_error(rc, "SQLBindParameter");
return TRUE;
/* this is an unknown type */
default:
RAISE_IBM_STMT_ERROR( "IM001", "SQLBindParameter", "Unknown parameter type" );
return FALSE;
}
return TRUE;
}
/* handle the pre-execution phase for bound parameters. */
static int stmt_parameter_pre_execute(pdo_stmt_t *stmt, struct pdo_bound_param_data *curr)
{
stmt_handle *stmt_res = (stmt_handle *) stmt->driver_data;
param_node *param_res = (param_node *) curr->driver_data;
/*
* Now we need to prepare the parameter binding information
* for execution. If this is a LOB, then we need to ensure
* the LOB data is going to be available and make sure
* the binding is tagged to provide the data at exec time.
*/
zval *parameter;
if (Z_ISREF(curr->parameter)) {
parameter = Z_REFVAL(curr->parameter);
} else {
parameter = &curr->parameter;
}
if (PDO_PARAM_TYPE(curr->param_type) == PDO_PARAM_LOB) {
/*
* If the LOB data is a stream, we need to make sure it is
* really there.
*/
if (Z_TYPE_P(parameter) == IS_RESOURCE) {
php_stream *stm;
php_stream_statbuf sb;
/* make sure we have a stream to work with */
php_stream_from_zval_no_verify(stm, parameter);
if (stm == NULL) {
RAISE_IBM_STMT_ERROR( "HY000" , "SQLBindParameter" ,
"PDO_PARAM_LOB file stream is invalid");
}
/*
* Now see if we can retrieve length information from
* the stream
*/
if (php_stream_stat(stm, &sb) == 0) {
/*
* Yes, we're able to give the statement some
* hints about the size.
*/
#ifndef PASE
param_res->transfer_length = SQL_LEN_DATA_AT_EXEC(sb.sb.st_size);
#endif
} else {
/*
* Still unknown...we'll have to do everything
* at execute size.
*/
param_res->transfer_length = SQL_LEN_DATA_AT_EXEC(0);
}
} else {
/*
* Convert this to a string value now. We bound the
* data pointer to our parameter descriptor, so we
* can't just supply this directly yet, but we can
* at least give the size hint information.
*/
convert_to_string(parameter);
param_res->transfer_length = SQL_LEN_DATA_AT_EXEC(Z_STRLEN_P(parameter));
}
} else {
if (Z_TYPE_P(parameter) != IS_NULL && param_res != NULL) {
/*
* if we're processing this as string or binary data,
* then directly update the length to the real value.
*/
if (param_res->ctype == SQL_C_LONG) {
/* make sure this is a long value */
convert_to_long(parameter);
} else {
/*
* Make sure this is a string value...it might
* have been changed between the bind and the
* execute
*/
convert_to_string(parameter);
param_res->transfer_length = Z_STRLEN_P(parameter);
}
}
}
return TRUE;
}
/* post-execution bound parameter handling. */
static int stmt_parameter_post_execute(pdo_stmt_t *stmt, struct pdo_bound_param_data *curr)
{
param_node *param_res = (param_node *) curr->driver_data;
/*
* If the type of the parameter is a string, we need to update the