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New CRC32() SQL function

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This commit is contained in:
unknown
2002-08-06 19:29:33 +05:00
parent 700cefd28b
commit 01a8a45f1e
5 changed files with 30 additions and 0 deletions
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5
sql/item_create.cc
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@@ -86,6 +86,11 @@ Item *create_func_cot(Item* a)
new Item_func_tan(a));
}
Item *create_func_crc32(Item* a)
{
return new Item_func_crc32(a);
}
Item *create_func_date_format(Item* a,Item *b)
{
return new Item_func_date_format(a,b,0);

1
sql/item_create.h
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@@ -29,6 +29,7 @@ Item *create_func_connection_id(void);
Item *create_func_conv(Item* a, Item *b, Item *c);
Item *create_func_cos(Item* a);
Item *create_func_cot(Item* a);
Item *create_func_crc32(Item* a);
Item *create_func_date_format(Item* a,Item *b);
Item *create_func_dayname(Item* a);
Item *create_func_dayofmonth(Item* a);

13
sql/item_func.cc
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@@ -26,6 +26,7 @@
#include <hash.h>
#include <time.h>
#include <ft_global.h>
#include <zlib.h>
#include "slave.h" // for wait_for_master_pos
#include "gstream.h"
@@ -801,6 +802,18 @@ longlong Item_func_min_max::val_int()
return value;
}
longlong Item_func_crc32::val_int()
{
String *res=args[0]->val_str(&value);
if (!res)
{
null_value=1;
return 0; /* purecov: inspected */
}
null_value=0;
return (longlong) crc32(0L, (Bytef*)res->ptr(), res->length());
}
longlong Item_func_length::val_int()
{

10
sql/item_func.h
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@@ -518,6 +518,16 @@ public:
const char *func_name() const { return "greatest"; }
};
class Item_func_crc32 :public Item_int_func
{
String value;
public:
Item_func_crc32(Item *a) :Item_int_func(a) {}
longlong val_int();
const char *func_name() const { return "crc32"; }
void fix_length_and_dec() { max_length=10; }
};
class Item_func_length :public Item_int_func
{

1
sql/lex.h
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@@ -430,6 +430,7 @@ static SYMBOL sql_functions[] = {
{ "COUNT", SYM(COUNT_SYM),0,0},
{ "COS", SYM(FUNC_ARG1),0,CREATE_FUNC(create_func_cos)},
{ "COT", SYM(FUNC_ARG1),0,CREATE_FUNC(create_func_cot)},
{ "CRC32", SYM(FUNC_ARG1),0,CREATE_FUNC(create_func_crc32)},
{ "CROSSES", SYM(FUNC_ARG2),0,CREATE_FUNC(create_func_crosses)},
{ "CURDATE", SYM(CURDATE),0,0},
{ "CURTIME", SYM(CURTIME),0,0},