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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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18
src/backend/utils/misc/guc.c
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@ -10,7 +10,7 @@
* Written by Peter Eisentraut <peter_e@gmx.net>.
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.509 2009/07/22 17:00:23 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.510 2009/08/04 16:08:36 tgl Exp $
*
*--------------------------------------------------------------------
*/
@ -61,6 +61,7 @@
#include "tcop/tcopprot.h"
#include "tsearch/ts_cache.h"
#include "utils/builtins.h"
#include "utils/bytea.h"
#include "utils/guc_tables.h"
#include "utils/memutils.h"
#include "utils/pg_locale.h"
@ -180,6 +181,12 @@ static char *config_enum_get_options(struct config_enum * record,
* NOTE! Option values may not contain double quotes!
*/
static const struct config_enum_entry bytea_output_options[] = {
{"escape", BYTEA_OUTPUT_ESCAPE, false},
{"hex", BYTEA_OUTPUT_HEX, false},
{NULL, 0, false}
};
/*
* We have different sets for client and server message level options because
* they sort slightly different (see "log" level)
@ -2540,6 +2547,15 @@ static struct config_enum ConfigureNamesEnum[] =
BACKSLASH_QUOTE_SAFE_ENCODING, backslash_quote_options, NULL, NULL
},
{
{"bytea_output", PGC_USERSET, CLIENT_CONN_STATEMENT,
gettext_noop("Sets the output format for bytea."),
NULL
},
&bytea_output,
BYTEA_OUTPUT_HEX, bytea_output_options, NULL, NULL
},
{
{"client_min_messages", PGC_USERSET, LOGGING_WHEN,
gettext_noop("Sets the message levels that are sent to the client."),