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Add the ability to create indexes 'concurrently', that is, without

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blocking concurrent writes to the table.  Greg Stark, with a little help
from Tom Lane.
This commit is contained in:
Tom Lane
2006-08-25 04:06:58 +00:00
parent 8f91e2b607
commit e093dcdd28
34 changed files with 1025 additions and 138 deletions
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69
src/bin/psql/common.c
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@@ -3,7 +3,7 @@
*
* Copyright (c) 2000-2006, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/bin/psql/common.c,v 1.124 2006/08/13 21:10:04 tgl Exp $
* $PostgreSQL: pgsql/src/bin/psql/common.c,v 1.125 2006/08/25 04:06:54 tgl Exp $
*/
#include "postgres_fe.h"
#include "common.h"
@@ -1075,22 +1075,71 @@ command_no_begin(const char *query)
* Commands not allowed within transactions. The statements checked for
* here should be exactly those that call PreventTransactionChain() in the
* backend.
*
* Note: we are a bit sloppy about CLUSTER, which is transactional in some
* variants but not others.
*/
if (wordlen == 6 && pg_strncasecmp(query, "vacuum", 6) == 0)
return true;
if (wordlen == 7 && pg_strncasecmp(query, "cluster", 7) == 0)
return true;
{
/* CLUSTER with any arguments is allowed in transactions */
query += wordlen;
query = skip_white_space(query);
if (isalpha((unsigned char) query[0]))
return false; /* has additional words */
return true; /* it's CLUSTER without arguments */
}
if (wordlen == 6 && pg_strncasecmp(query, "create", 6) == 0)
{
query += wordlen;
query = skip_white_space(query);
wordlen = 0;
while (isalpha((unsigned char) query[wordlen]))
wordlen += PQmblen(&query[wordlen], pset.encoding);
if (wordlen == 8 && pg_strncasecmp(query, "database", 8) == 0)
return true;
if (wordlen == 10 && pg_strncasecmp(query, "tablespace", 10) == 0)
return true;
/* CREATE [UNIQUE] INDEX CONCURRENTLY isn't allowed in xacts */
if (wordlen == 6 && pg_strncasecmp(query, "unique", 6) == 0)
{
query += wordlen;
query = skip_white_space(query);
wordlen = 0;
while (isalpha((unsigned char) query[wordlen]))
wordlen += PQmblen(&query[wordlen], pset.encoding);
}
if (wordlen == 5 && pg_strncasecmp(query, "index", 5) == 0)
{
query += wordlen;
query = skip_white_space(query);
wordlen = 0;
while (isalpha((unsigned char) query[wordlen]))
wordlen += PQmblen(&query[wordlen], pset.encoding);
if (wordlen == 12 && pg_strncasecmp(query, "concurrently", 12) == 0)
return true;
}
return false;
}
/*
* Note: these tests will match CREATE SYSTEM, DROP SYSTEM, and REINDEX
* TABLESPACE, which aren't really valid commands so we don't care much.
* The other six possible matches are correct.
* Note: these tests will match DROP SYSTEM and REINDEX TABLESPACE,
* which aren't really valid commands so we don't care much.
* The other four possible matches are correct.
*/
if ((wordlen == 6 && pg_strncasecmp(query, "create", 6) == 0) ||
(wordlen == 4 && pg_strncasecmp(query, "drop", 4) == 0) ||
if ((wordlen == 4 && pg_strncasecmp(query, "drop", 4) == 0) ||
(wordlen == 7 && pg_strncasecmp(query, "reindex", 7) == 0))
{
query += wordlen;