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Introduce macros for protocol characters.

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This commit introduces descriptively-named macros for the
identifiers used in wire protocol messages.  These new macros are
placed in a new header file so that they can be easily used by
third-party code.

Author: Dave Cramer
Reviewed-by: Alvaro Herrera, Tatsuo Ishii, Peter Smith, Robert Haas, Tom Lane, Peter Eisentraut, Michael Paquier
Discussion: https://postgr.es/m/CADK3HHKbBmK-PKf1bPNFoMC%2BoBt%2BpD9PH8h5nvmBQskEHm-Ehw%40mail.gmail.com
This commit is contained in:
Nathan Bossart
2023-08-22 19:16:12 -07:00
parent 7114791158
commit f4b54e1ed9
25 changed files with 305 additions and 204 deletions
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5
src/backend/access/common/printsimple.c
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@@ -20,6 +20,7 @@
#include "access/printsimple.h"
#include "catalog/pg_type.h"
#include "libpq/protocol.h"
#include "libpq/pqformat.h"
#include "utils/builtins.h"
@@ -32,7 +33,7 @@ printsimple_startup(DestReceiver *self, int operation, TupleDesc tupdesc)
StringInfoData buf;
int i;
pq_beginmessage(&buf, 'T'); /* RowDescription */
pq_beginmessage(&buf, PqMsg_RowDescription);
pq_sendint16(&buf, tupdesc->natts);
for (i = 0; i < tupdesc->natts; ++i)
@@ -65,7 +66,7 @@ printsimple(TupleTableSlot *slot, DestReceiver *self)
slot_getallattrs(slot);
/* Prepare and send message */
pq_beginmessage(&buf, 'D');
pq_beginmessage(&buf, PqMsg_DataRow);
pq_sendint16(&buf, tupdesc->natts);
for (i = 0; i < tupdesc->natts; ++i)