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MySQL 5.1: Item_load_file Class Reference

Item_load_file Class Reference

#include <item_strfunc.h>

Inheritance diagram for Item_load_file:

[legend]Collaboration diagram for Item_load_file:

[legend]List of all members.


Public Member Functions
	Item_load_file (Item *a)
String *	val_str (String *)
const char *	func_name () const
void	fix_length_and_dec ()
Private Attributes
String	tmp_value

Detailed Description

Definition at line 643 of file item_strfunc.h.

Constructor & Destructor Documentation

Item_load_file::Item_load_file ( Item * a ) [inline]

Definition at line 647 of file item_strfunc.h.

00647 :Item_str_func(a) {}

Member Function Documentation

void Item_load_file::fix_length_and_dec ( ) [inline, virtual]

Implements Item_result_field.

Definition at line 650 of file item_strfunc.h.

References Item::collation, DERIVATION_COERCIBLE, MAX_BLOB_WIDTH, Item::max_length, Item::maybe_null, my_charset_bin, and DTCollation::set().

00651   {
00652     collation.set(&my_charset_bin, DERIVATION_COERCIBLE);
00653     maybe_null=1;
00654     max_length=MAX_BLOB_WIDTH;
00655   }

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const char* Item_load_file::func_name ( ) const [inline, virtual]

Implements Item_func.

Definition at line 649 of file item_strfunc.h.

Referenced by val_str().

00649 { return "load_file"; }

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String * Item_load_file::val_str ( String * ) [virtual]

Implements Item.

Definition at line 2603 of file item_strfunc.cc.

References String::alloc(), Item_func::args, String::c_ptr(), current_thd, DBUG_ASSERT, DBUG_ENTER, DBUG_RETURN, ER, ER_WARN_ALLOWED_PACKET_OVERFLOWED, err, FILE_ACL, Item::fixed, fn_format(), FN_REFLEN, func_name(), String::length(), my_close(), MY_NABP, my_open(), my_read, MY_RELATIVE_PATH, my_stat(), MY_STAT, MY_UNPACK_FILENAME, MYF, mysql_real_data_home, Item::null_value, path, String::ptr(), push_warning_printf(), S_IROTH, tmp_value, and MYSQL_ERROR::WARN_LEVEL_WARN.

02604 {
02605   DBUG_ASSERT(fixed == 1);
02606   String *file_name;
02607   File file;
02608   MY_STAT stat_info;
02609   char path[FN_REFLEN];
02610   DBUG_ENTER("load_file");
02611 
02612   if (!(file_name= args[0]->val_str(str))
02613 #ifndef NO_EMBEDDED_ACCESS_CHECKS
02614       || !(current_thd->security_ctx->master_access & FILE_ACL)
02615 #endif
02616       )
02617     goto err;
02618 
02619   (void) fn_format(path, file_name->c_ptr(), mysql_real_data_home, "",
02620                    MY_RELATIVE_PATH | MY_UNPACK_FILENAME);
02621 
02622   if (!my_stat(path, &stat_info, MYF(0)))
02623     goto err;
02624 
02625   if (!(stat_info.st_mode & S_IROTH))
02626   {
02627     /* my_error(ER_TEXTFILE_NOT_READABLE, MYF(0), file_name->c_ptr()); */
02628     goto err;
02629   }
02630   if (stat_info.st_size > (long) current_thd->variables.max_allowed_packet)
02631   {
02632     push_warning_printf(current_thd, MYSQL_ERROR::WARN_LEVEL_WARN,
02633                         ER_WARN_ALLOWED_PACKET_OVERFLOWED,
02634                         ER(ER_WARN_ALLOWED_PACKET_OVERFLOWED),
02635                         func_name(), current_thd->variables.max_allowed_packet);
02636     goto err;
02637   }
02638   if (tmp_value.alloc(stat_info.st_size))
02639     goto err;
02640   if ((file = my_open(file_name->c_ptr(), O_RDONLY, MYF(0))) < 0)
02641     goto err;
02642   if (my_read(file, (byte*) tmp_value.ptr(), stat_info.st_size, MYF(MY_NABP)))
02643   {
02644     my_close(file, MYF(0));
02645     goto err;
02646   }
02647   tmp_value.length(stat_info.st_size);
02648   my_close(file, MYF(0));
02649   null_value = 0;
02650   DBUG_RETURN(&tmp_value);
02651 
02652 err:
02653   null_value = 1;
02654   DBUG_RETURN(0);
02655 }

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Member Data Documentation

String Item_load_file::tmp_value [private]

Definition at line 645 of file item_strfunc.h.

Referenced by val_str().

The documentation for this class was generated from the following files:

mysql/src/5.1-dbg/sql/item_strfunc.h
mysql/src/5.1-dbg/sql/item_strfunc.cc

Generated on Sat Sep 9 21:49:43 2006 for MySQL 5.1 by

1.4.7