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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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6
src/backend/commands/copyto.c
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@ -144,7 +144,7 @@ SendCopyBegin(CopyToState cstate)
int16 format = (cstate->opts.binary ? 1 : 0);
int i;
pq_beginmessage(&buf, 'H');
pq_beginmessage(&buf, PqMsg_CopyOutResponse);
pq_sendbyte(&buf, format); /* overall format */
pq_sendint16(&buf, natts);
for (i = 0; i < natts; i++)
@ -159,7 +159,7 @@ SendCopyEnd(CopyToState cstate)
/* Shouldn't have any unsent data */
Assert(cstate->fe_msgbuf->len == 0);
/* Send Copy Done message */
pq_putemptymessage('c');
pq_putemptymessage(PqMsg_CopyDone);
}
/*----------
@ -247,7 +247,7 @@ CopySendEndOfRow(CopyToState cstate)
CopySendChar(cstate, '\n');
/* Dump the accumulated row as one CopyData message */
(void) pq_putmessage('d', fe_msgbuf->data, fe_msgbuf->len);
(void) pq_putmessage(PqMsg_CopyData, fe_msgbuf->data, fe_msgbuf->len);
break;
case COPY_CALLBACK:
cstate->data_dest_cb(fe_msgbuf->data, fe_msgbuf->len);