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Remove pg_dump/pg_dumpall support for dumping from pre-8.0 servers. 

The need for dumping from such ancient servers has decreased to about nil
in the field, so let's remove all the code that catered to it.  Aside
from removing a lot of boilerplate variant queries, this allows us to not
have to cope with servers that don't have (a) schemas or (b) pg_depend.
That means we can get rid of assorted squishy code around that.  There
may be some nonobvious additional simplifications possible, but this patch
already removes about 1500 lines of code.

I did not remove the ability for pg_restore to read custom-format archives
generated by these old versions (and light testing says that that does
still work).  If you have an old server, you probably also have a pg_dump
that will work with it; but you have an old custom-format backup file,
that might be all you have.

It'd be possible at this point to remove fmtQualifiedId()'s version
argument, but I refrained since that would affect code outside pg_dump.

Discussion: <2661.1475849167@sss.pgh.pa.us>
This commit is contained in:
Tom Lane 2016-10-12 12:19:56 -04:00
parent bb55dd6059
commit 64f3524e2c
7 changed files with 232 additions and 1759 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
doc/src/sgml/ref/pg_dump.sgml
View File

@ -758,10 +758,9 @@ PostgreSQL documentation
the dump. Instead fail if unable to lock a table within the specified
<replaceable class="parameter">timeout</>. The timeout may be
specified in any of the formats accepted by <command>SET
statement_timeout</>. (Allowed values vary depending on the server
statement_timeout</>. (Allowed formats vary depending on the server
version you are dumping from, but an integer number of milliseconds
is accepted by all versions since 7.3. This option is ignored when
dumping from a pre-7.3 server.)
is accepted by all versions.)
</para>
</listitem>
</varlistentry>
@ -1172,7 +1171,7 @@ CREATE DATABASE foo WITH TEMPLATE template0;
<productname>PostgreSQL</> server versions newer than
<application>pg_dump</>'s version. <application>pg_dump</> can also
dump from <productname>PostgreSQL</> servers older than its own version.
(Currently, servers back to version 7.0 are supported.)
(Currently, servers back to version 8.0 are supported.)
However, <application>pg_dump</> cannot dump from
<productname>PostgreSQL</> servers newer than its own major version;
it will refuse to even try, rather than risk making an invalid dump.

50
src/bin/pg_dump/dumputils.c
View File

@ -18,8 +18,6 @@
#include "fe_utils/string_utils.h"
#define supports_grant_options(version) ((version) >= 70400)
static bool parseAclItem(const char *item, const char *type,
const char *name, const char *subname, int remoteVersion,
PQExpBuffer grantee, PQExpBuffer grantor,
@ -246,11 +244,9 @@ buildACLCommands(const char *name, const char *subname,
/*
* For the owner, the default privilege level is ALL WITH
* GRANT OPTION (only ALL prior to 7.4).
* GRANT OPTION.
*/
if (supports_grant_options(remoteVersion)
? strcmp(privswgo->data, "ALL") != 0
: strcmp(privs->data, "ALL") != 0)
if (strcmp(privswgo->data, "ALL") != 0)
{
appendPQExpBuffer(firstsql, "%sREVOKE ALL", prefix);
if (subname)
@ -403,16 +399,19 @@ buildDefaultACLCommands(const char *type, const char *nspname,
* username=privilegecodes/grantor
* or
* group groupname=privilegecodes/grantor
* (the /grantor part will not be present if pre-7.4 database).
* (the "group" case occurs only with servers before 8.1).
*
* Returns true on success, false on parse error. On success, the components
* of the string are returned in the PQExpBuffer parameters.
*
* The returned grantee string will be the dequoted username or groupname
* (preceded with "group " in the latter case). The returned grantor is
* the dequoted grantor name or empty. Privilege characters are decoded
* and split between privileges with grant option (privswgo) and without
* (privs).
* (preceded with "group " in the latter case). Note that a grant to PUBLIC
* is represented by an empty grantee string. The returned grantor is the
* dequoted grantor name. Privilege characters are decoded and split between
* privileges with grant option (privswgo) and without (privs).
*
* Note: for cross-version compatibility, it's important to use ALL when
* appropriate.
* Note: for cross-version compatibility, it's important to use ALL to
* represent the privilege sets whenever appropriate.
*/
static bool
parseAclItem(const char *item, const char *type,
@ -439,7 +438,7 @@ parseAclItem(const char *item, const char *type,
return false;
}
/* grantor may be listed after / */
/* grantor should appear after / */
slpos = strchr(eqpos + 1, '/');
if (slpos)
{
@ -452,7 +451,10 @@ parseAclItem(const char *item, const char *type,
}
}
else
resetPQExpBuffer(grantor);
{
free(buf);
return false;
}
/* privilege codes */
#define CONVERT_PRIV(code, keywd) \
@ -490,29 +492,19 @@ do { \
{
/* table only */
CONVERT_PRIV('a', "INSERT");
if (remoteVersion >= 70200)
CONVERT_PRIV('x', "REFERENCES");
CONVERT_PRIV('x', "REFERENCES");
/* rest are not applicable to columns */
if (subname == NULL)
{
if (remoteVersion >= 70200)
{
CONVERT_PRIV('d', "DELETE");
CONVERT_PRIV('t', "TRIGGER");
}
CONVERT_PRIV('d', "DELETE");
CONVERT_PRIV('t', "TRIGGER");
if (remoteVersion >= 80400)
CONVERT_PRIV('D', "TRUNCATE");
}
}
/* UPDATE */
if (remoteVersion >= 70200 ||
strcmp(type, "SEQUENCE") == 0 ||
strcmp(type, "SEQUENCES") == 0)
CONVERT_PRIV('w', "UPDATE");
else
/* 7.0 and 7.1 have a simpler worldview */
CONVERT_PRIV('w', "UPDATE,DELETE");
CONVERT_PRIV('w', "UPDATE");
}
else if (strcmp(type, "FUNCTION") == 0 ||
strcmp(type, "FUNCTIONS") == 0)

2
src/bin/pg_dump/pg_backup_archiver.c
View File

@ -388,7 +388,7 @@ RestoreArchive(Archive *AHX)
* target.
*/
AHX->minRemoteVersion = 0;
AHX->maxRemoteVersion = 999999;
AHX->maxRemoteVersion = 9999999;
ConnectDatabase(AHX, ropt->dbname,
ropt->pghost, ropt->pgport, ropt->username,

1725
src/bin/pg_dump/pg_dump.c
View File

File diff suppressed because it is too large Load Diff

1
src/bin/pg_dump/pg_dump.h
View File

@ -605,7 +605,6 @@ extern void parseOidArray(const char *str, Oid *array, int arraysize);
extern void sortDumpableObjects(DumpableObject **objs, int numObjs,
DumpId preBoundaryId, DumpId postBoundaryId);
extern void sortDumpableObjectsByTypeName(DumpableObject **objs, int numObjs);
extern void sortDumpableObjectsByTypeOid(DumpableObject **objs, int numObjs);
extern void sortDataAndIndexObjectsBySize(DumpableObject **objs, int numObjs);
/*

96
src/bin/pg_dump/pg_dump_sort.c
View File

@ -23,63 +23,7 @@
static const char *modulename = gettext_noop("sorter");
/*
* Sort priority for object types when dumping a pre-7.3 database.
* Objects are sorted by priority levels, and within an equal priority level
* by OID. (This is a relatively crude hack to provide semi-reasonable
* behavior for old databases without full dependency info.) Note: collations,
* extensions, text search, foreign-data, materialized view, event trigger,
* policies, transforms, access methods and default ACL objects can't really
* happen here, so the rather bogus priorities for them don't matter.
*
* NOTE: object-type priorities must match the section assignments made in
* pg_dump.c; that is, PRE_DATA objects must sort before DO_PRE_DATA_BOUNDARY,
* POST_DATA objects must sort after DO_POST_DATA_BOUNDARY, and DATA objects
* must sort between them.
*/
static const int oldObjectTypePriority[] =
{
1, /* DO_NAMESPACE */
1, /* DO_EXTENSION */
2, /* DO_TYPE */
2, /* DO_SHELL_TYPE */
2, /* DO_FUNC */
3, /* DO_AGG */
3, /* DO_OPERATOR */
3, /* DO_ACCESS_METHOD */
4, /* DO_OPCLASS */
4, /* DO_OPFAMILY */
4, /* DO_COLLATION */
5, /* DO_CONVERSION */
6, /* DO_TABLE */
8, /* DO_ATTRDEF */
15, /* DO_INDEX */
16, /* DO_RULE */
17, /* DO_TRIGGER */
14, /* DO_CONSTRAINT */
18, /* DO_FK_CONSTRAINT */
2, /* DO_PROCLANG */
2, /* DO_CAST */
11, /* DO_TABLE_DATA */
7, /* DO_DUMMY_TYPE */
4, /* DO_TSPARSER */
4, /* DO_TSDICT */
4, /* DO_TSTEMPLATE */
4, /* DO_TSCONFIG */
4, /* DO_FDW */
4, /* DO_FOREIGN_SERVER */
19, /* DO_DEFAULT_ACL */
4, /* DO_TRANSFORM */
9, /* DO_BLOB */
12, /* DO_BLOB_DATA */
10, /* DO_PRE_DATA_BOUNDARY */
13, /* DO_POST_DATA_BOUNDARY */
20, /* DO_EVENT_TRIGGER */
15, /* DO_REFRESH_MATVIEW */
21 /* DO_POLICY */
};
/*
* Sort priority for object types when dumping newer databases.
* Sort priority for database object types.
* Objects are sorted by type, and within a type by name.
*
* NOTE: object-type priorities must match the section assignments made in
@ -87,7 +31,7 @@ static const int oldObjectTypePriority[] =
* POST_DATA objects must sort after DO_POST_DATA_BOUNDARY, and DATA objects
* must sort between them.
*/
static const int newObjectTypePriority[] =
static const int dbObjectTypePriority[] =
{
1, /* DO_NAMESPACE */
4, /* DO_EXTENSION */
@ -134,7 +78,6 @@ static DumpId postDataBoundId;
static int DOTypeNameCompare(const void *p1, const void *p2);
static int DOTypeOidCompare(const void *p1, const void *p2);
static bool TopoSort(DumpableObject **objs,
int numObjs,
DumpableObject **ordering,
@ -266,8 +209,8 @@ DOTypeNameCompare(const void *p1, const void *p2)
int cmpval;
/* Sort by type */
cmpval = newObjectTypePriority[obj1->objType] -
newObjectTypePriority[obj2->objType];
cmpval = dbObjectTypePriority[obj1->objType] -
dbObjectTypePriority[obj2->objType];
if (cmpval != 0)
return cmpval;
@ -345,37 +288,6 @@ DOTypeNameCompare(const void *p1, const void *p2)
}
/*
* Sort the given objects into a type/OID-based ordering
*
* This is used with pre-7.3 source databases as a crude substitute for the
* lack of dependency information.
*/
void
sortDumpableObjectsByTypeOid(DumpableObject **objs, int numObjs)
{
if (numObjs > 1)
qsort((void *) objs, numObjs, sizeof(DumpableObject *),
DOTypeOidCompare);
}
static int
DOTypeOidCompare(const void *p1, const void *p2)
{
DumpableObject *obj1 = *(DumpableObject *const *) p1;
DumpableObject *obj2 = *(DumpableObject *const *) p2;
int cmpval;
cmpval = oldObjectTypePriority[obj1->objType] -
oldObjectTypePriority[obj2->objType];
if (cmpval != 0)
return cmpval;
return oidcmp(obj1->catId.oid, obj2->catId.oid);
}
/*
* Sort the given objects into a safe dump order using dependency
* information (to the extent we have it available).

110
src/bin/pg_dump/pg_dumpall.c
View File

@ -480,10 +480,7 @@ main(int argc, char *argv[])
dropDBs(conn);
if (!roles_only && !no_tablespaces)
{
if (server_version >= 80000)
dropTablespaces(conn);
}
dropTablespaces(conn);
if (!tablespaces_only)
dropRoles(conn);
@ -505,12 +502,9 @@ main(int argc, char *argv[])
dumpGroups(conn);
}
/* Dump tablespaces */
if (!roles_only && !no_tablespaces)
{
/* Dump tablespaces */
if (server_version >= 80000)
dumpTablespaces(conn);
}
dumpTablespaces(conn);
/* Dump CREATE DATABASE commands */
if (binary_upgrade || (!globals_only && !roles_only && !tablespaces_only))
@ -886,9 +880,8 @@ dumpRoles(PGconn *conn)
* We do it this way because config settings for roles could mention the
* names of other roles.
*/
if (server_version >= 70300)
for (i = 0; i < PQntuples(res); i++)
dumpUserConfig(conn, PQgetvalue(res, i, i_rolname));
for (i = 0; i < PQntuples(res); i++)
dumpUserConfig(conn, PQgetvalue(res, i, i_rolname));
PQclear(res);
@ -1204,16 +1197,10 @@ dropDBs(PGconn *conn)
PGresult *res;
int i;
if (server_version >= 70100)
res = executeQuery(conn,
"SELECT datname "
"FROM pg_database d "
"WHERE datallowconn ORDER BY 1");
else
res = executeQuery(conn,
"SELECT datname "
"FROM pg_database d "
"ORDER BY 1");
res = executeQuery(conn,
"SELECT datname "
"FROM pg_database d "
"WHERE datallowconn ORDER BY 1");
if (PQntuples(res) > 0)
fprintf(OPF, "--\n-- Drop databases\n--\n\n");
@ -1269,12 +1256,10 @@ dumpCreateDB(PGconn *conn)
* We will dump encoding and locale specifications in the CREATE DATABASE
* commands for just those databases with values different from defaults.
*
* We consider template0's encoding and locale (or, pre-7.1, template1's)
* to define the installation default. Pre-8.4 installations do not have
* per-database locale settings; for them, every database must necessarily
* be using the installation default, so there's no need to do anything
* (which is good, since in very old versions there is no good way to find
* out what the installation locale is anyway...)
* We consider template0's encoding and locale to define the installation
* default. Pre-8.4 installations do not have per-database locale
* settings; for them, every database must necessarily be using the
* installation default, so there's no need to do anything.
*/
if (server_version >= 80400)
res = executeQuery(conn,
@ -1282,18 +1267,12 @@ dumpCreateDB(PGconn *conn)
"datcollate, datctype "
"FROM pg_database "
"WHERE datname = 'template0'");
else if (server_version >= 70100)
res = executeQuery(conn,
"SELECT pg_encoding_to_char(encoding), "
"null::text AS datcollate, null::text AS datctype "
"FROM pg_database "
"WHERE datname = 'template0'");
else
res = executeQuery(conn,
"SELECT pg_encoding_to_char(encoding), "
"null::text AS datcollate, null::text AS datctype "
"FROM pg_database "
"WHERE datname = 'template1'");
"WHERE datname = 'template0'");
/* If for some reason the template DB isn't there, treat as unknown */
if (PQntuples(res) > 0)
@ -1371,7 +1350,7 @@ dumpCreateDB(PGconn *conn)
"(SELECT spcname FROM pg_tablespace t WHERE t.oid = d.dattablespace) AS dattablespace "
"FROM pg_database d LEFT JOIN pg_authid u ON (datdba = u.oid) "
"WHERE datallowconn ORDER BY 1");
else if (server_version >= 80000)
else
res = executeQuery(conn,
"SELECT datname, "
"coalesce(usename, (select usename from pg_shadow where usesysid=(select datdba from pg_database where datname='template0'))), "
@ -1382,47 +1361,6 @@ dumpCreateDB(PGconn *conn)
"(SELECT spcname FROM pg_tablespace t WHERE t.oid = d.dattablespace) AS dattablespace "
"FROM pg_database d LEFT JOIN pg_shadow u ON (datdba = usesysid) "
"WHERE datallowconn ORDER BY 1");
else if (server_version >= 70300)
res = executeQuery(conn,
"SELECT datname, "
"coalesce(usename, (select usename from pg_shadow where usesysid=(select datdba from pg_database where datname='template0'))), "
"pg_encoding_to_char(d.encoding), "
"null::text AS datcollate, null::text AS datctype, datfrozenxid, 0 AS datminmxid, "
"datistemplate, datacl, '' as rdatacl, "
"-1 as datconnlimit, "
"'pg_default' AS dattablespace "
"FROM pg_database d LEFT JOIN pg_shadow u ON (datdba = usesysid) "
"WHERE datallowconn ORDER BY 1");
else if (server_version >= 70100)
res = executeQuery(conn,
"SELECT datname, "
"coalesce("
"(select usename from pg_shadow where usesysid=datdba), "
"(select usename from pg_shadow where usesysid=(select datdba from pg_database where datname='template0'))), "
"pg_encoding_to_char(d.encoding), "
"null::text AS datcollate, null::text AS datctype, 0 AS datfrozenxid, 0 AS datminmxid, "
"datistemplate, '' as datacl, '' as rdatacl, "
"-1 as datconnlimit, "
"'pg_default' AS dattablespace "
"FROM pg_database d "
"WHERE datallowconn ORDER BY 1");
else
{
/*
* Note: 7.0 fails to cope with sub-select in COALESCE, so just deal
* with getting a NULL by not printing any OWNER clause.
*/
res = executeQuery(conn,
"SELECT datname, "
"(select usename from pg_shadow where usesysid=datdba), "
"pg_encoding_to_char(d.encoding), "
"null::text AS datcollate, null::text AS datctype, 0 AS datfrozenxid, 0 AS datminmxid, "
"'f' as datistemplate, "
"'' as datacl, '' as rdatacl, -1 as datconnlimit, "
"'pg_default' AS dattablespace "
"FROM pg_database d "
"ORDER BY 1");
}
for (i = 0; i < PQntuples(res); i++)
{
@ -1541,8 +1479,7 @@ dumpCreateDB(PGconn *conn)
fprintf(OPF, "%s", buf->data);
if (server_version >= 70300)
dumpDatabaseConfig(conn, dbname);
dumpDatabaseConfig(conn, dbname);
free(fdbname);
}
@ -1738,10 +1675,7 @@ dumpDatabases(PGconn *conn)
PGresult *res;
int i;
if (server_version >= 70100)
res = executeQuery(conn, "SELECT datname FROM pg_database WHERE datallowconn ORDER BY 1");
else
res = executeQuery(conn, "SELECT datname FROM pg_database ORDER BY 1");
res = executeQuery(conn, "SELECT datname FROM pg_database WHERE datallowconn ORDER BY 1");
for (i = 0; i < PQntuples(res); i++)
{
@ -2062,11 +1996,11 @@ connectDatabase(const char *dbname, const char *connection_string,
my_version = PG_VERSION_NUM;
/*
* We allow the server to be back to 7.0, and up to any minor release of
* We allow the server to be back to 8.0, and up to any minor release of
* our own major version. (See also version check in pg_dump.c.)
*/
if (my_version != server_version
&& (server_version < 70000 ||
&& (server_version < 80000 ||
(server_version / 100) > (my_version / 100)))
{
fprintf(stderr, _("server version: %s; %s version: %s\n"),
@ -2076,11 +2010,9 @@ connectDatabase(const char *dbname, const char *connection_string,
}
/*
* On 7.3 and later, make sure we are not fooled by non-system schemas in
* the search path.
* Make sure we are not fooled by non-system schemas in the search path.
*/
if (server_version >= 70300)
executeCommand(conn, "SET search_path = pg_catalog");
executeCommand(conn, "SET search_path = pg_catalog");
return conn;
}