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Supports PostgreSQL 9.4 and later versions #4

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Supports PostgreSQL 9.4 and later versions #4

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13 changes: 13 additions & 0 deletions src/pg_journal.c
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Original file line number Diff line number Diff line change
Expand Up @@ -230,16 +230,29 @@ append_fmt(StringInfo str, struct iovec *field, const char *fmt, ...)
{
size_t old_len = str->len;
va_list args;
#if PG_VERSION_NUM >= 90400
int needed;
#else
bool success;
#endif

/* appendStringInfoVA can fail due to insufficient space */
while (1) {
va_start(args, fmt);
#if PG_VERSION_NUM >= 90400
needed = appendStringInfoVA(str, fmt, args);
#else
success = appendStringInfoVA(str, fmt, args);
#endif
va_end(args);

#if PG_VERSION_NUM >= 90400
if (needed == 0)
break;
#else
if (success)
break;
#endif

/* Double the buffer size and try again. */
enlargeStringInfo(str, str->maxlen);
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