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Support hex-string input and output for type BYTEA.

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Both hex format and the traditional "escape" format are automatically
handled on input.  The output format is selected by the new GUC variable
bytea_output.

As committed, bytea_output defaults to HEX, which is an *incompatible
change*.  We will keep it this way for awhile for testing purposes, but
should consider whether to switch to the more backwards-compatible
default of ESCAPE before 8.5 is released.

Peter Eisentraut
This commit is contained in:
Tom Lane
2009-08-04 16:08:37 +00:00
parent f192e4a5d0
commit a2a8c7a662
21 changed files with 442 additions and 111 deletions
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10
src/backend/utils/adt/encode.c
View File

@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/encode.c,v 1.23 2009/01/01 17:23:49 momjian Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/encode.c,v 1.24 2009/08/04 16:08:36 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -109,7 +109,7 @@ binary_decode(PG_FUNCTION_ARGS)
* HEX
*/
static const char *hextbl = "0123456789abcdef";
static const char hextbl[] = "0123456789abcdef";
static const int8 hexlookup[128] = {
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
@ -122,7 +122,7 @@ static const int8 hexlookup[128] = {
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
};
static unsigned
unsigned
hex_encode(const char *src, unsigned len, char *dst)
{
const char *end = src + len;
@ -136,7 +136,7 @@ hex_encode(const char *src, unsigned len, char *dst)
return len * 2;
}
static char
static inline char
get_hex(char c)
{
int res = -1;
@ -152,7 +152,7 @@ get_hex(char c)
return (char) res;
}
static unsigned
unsigned
hex_decode(const char *src, unsigned len, char *dst)
{
const char *s,