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Assorted minor refactoring in EXPLAIN.

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This is believed to not change the output at all, with one known exception:
"Subquery Scan foo" becomes "Subquery Scan on foo".  (We can fix that if
anyone complains, but it would be a wart, because the old code was clearly
inconsistent.)  The main intention is to remove duplicate coding and
provide a cleaner base for subsequent EXPLAIN patching.

Robert Haas
This commit is contained in:
Tom Lane
2009-07-24 21:08:42 +00:00
parent a7e587863c
commit 8af12bca3b
4 changed files with 292 additions and 439 deletions
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22
src/backend/lib/stringinfo.c
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@ -9,7 +9,7 @@
* Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/backend/lib/stringinfo.c,v 1.50 2009/01/01 17:23:42 momjian Exp $
* $PostgreSQL: pgsql/src/backend/lib/stringinfo.c,v 1.51 2009/07/24 21:08:42 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -186,6 +186,26 @@ appendStringInfoChar(StringInfo str, char ch)
str->data[str->len] = '\0';
}
/*
* appendStringInfoSpaces
*
* Append the specified number of spaces to a buffer.
*/
void
appendStringInfoSpaces(StringInfo str, int count)
{
if (count > 0)
{
/* Make more room if needed */
enlargeStringInfo(str, count);
/* OK, append the spaces */
while (--count >= 0)
str->data[str->len++] = ' ';
str->data[str->len] = '\0';
}
}
/*
* appendBinaryStringInfo
*