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[ dumping schemas ]

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> I don't care what you use for short options if all useful ones are taken.
> But the long option should be --schema.

Ok, fair enough: a revised patch is attached that uses the '-n' short
option and the '--schema' long option.

Neil Conway
WIN32_DEV
Bruce Momjian 23 years ago
parent 6d8b8a5e4d
commit 2bd63117c1
3 changed files with 189 additions and 73 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 60
      doc/src/sgml/ref/pg_dump.sgml
  2. 4
      src/bin/pg_dump/pg_backup_db.c
  3. 190
      src/bin/pg_dump/pg_dump.c

60
doc/src/sgml/ref/pg_dump.sgml
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@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/pg_dump.sgml,v 1.55 2003/01/19 00:13:30 momjian Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/ref/pg_dump.sgml,v 1.56 2003/02/13 04:54:15 momjian Exp $
PostgreSQL documentation
-->
@ -283,6 +283,28 @@ PostgreSQL documentation
</listitem>
</varlistentry>
<varlistentry>
<term><option>-n <replaceable class="parameter">namespace</replaceable></option></term>
<term><option>--schema=<replaceable class="parameter">schema</replaceable></option></term>
<listitem>
<para>
Dump the contents of <replaceable class="parameter">schema</>
only. If this option is not specified, all non-system schemas
in the target database will be dumped.
</para>
<note>
<para>
In this mode, <application>pg_dump</application> makes no
attempt to dump any other database objects that may depend
upon objects in the selected schema. Therefore, there is no
guarantee that the results of a single schema dump can be
successfully restored by themselves into a clean database.
</para>
</note>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-o</></term>
<term><option>--oids</></term>
@ -380,8 +402,22 @@ PostgreSQL documentation
<term><option>--table=<replaceable class="parameter">table</replaceable></option></term>
<listitem>
<para>
Dump data for <replaceable class="parameter">table</replaceable> only.
Dump data for <replaceable class="parameter">table</replaceable>
only. If <literal>*</literal> is specified, all tables in the
specified database will be dumped. It is possible for there to be
multiple tables with the same name in different schemas; if that
is the case, all matching tables will be dumped.
</para>
<note>
<para>
In this mode, <application>pg_dump</application> makes no
attempt to dump any other database objects that may depend
upon the selected table. Therefore, there is no guarantee
that the results of a single table dump can be successfully
restored by themselves into a clean database.
</para>
</note>
</listitem>
</varlistentry>
@ -495,10 +531,9 @@ PostgreSQL documentation
<term><option>--host=<replaceable class="parameter">host</replaceable></option></term>
<listitem>
<para>
Specifies the host name of the machine on which the
server
is running. If host begins with a slash, it is used
as the directory for the Unix domain socket.
Specifies the host name of the machine on which the server is
running. If the host name begins with a slash, it is used as the
directory for the Unix domain socket.
</para>
</listitem>
</varlistentry>
@ -551,7 +586,7 @@ PostgreSQL documentation
<listitem>
<para>
Default connection parameters
Default connection parameters.
</para>
</listitem>
</varlistentry>
@ -578,11 +613,10 @@ connectDBStart() -- connect() failed: No such file or directory
<msgexplan>
<para>
<application>pg_dump</application> could not attach to the
PostgreSQL server on the specified host and port. If you see this message,
ensure that the server
is running on the proper host and that you have specified the proper
port.
<application>pg_dump</application> could not connect to the
PostgreSQL server on the specified host and port. If you see this
message, ensure that the server is running on the proper host and
that you have specified the proper port.
</para>
</msgexplan>
</msgentry>
@ -630,7 +664,7 @@ CREATE DATABASE foo WITH TEMPLATE template0;
<listitem>
<para>
When doing a data only dump, <application>pg_dump</application> emits queries
When doing a data-only dump, <application>pg_dump</application> emits queries
to disable triggers on user tables before inserting the data and queries to
re-enable them after the data has been inserted. If the restore is stopped
in the middle, the system catalogs may be left in the wrong state.

4
src/bin/pg_dump/pg_backup_db.c
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@ -5,7 +5,7 @@
* Implements the basic DB functions used by the archiver.
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/bin/pg_dump/pg_backup_db.c,v 1.44 2003/02/01 22:06:59 tgl Exp $
* $Header: /cvsroot/pgsql/src/bin/pg_dump/pg_backup_db.c,v 1.45 2003/02/13 04:54:15 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -62,7 +62,7 @@ _check_database_version(ArchiveHandle *AH, bool ignoreVersion)
myversion = _parse_version(AH, PG_VERSION);
/*
* Autocommit could be off. We turn it off later but we have to check
* Autocommit could be off. We turn it on later but we have to check
* the database version first.
*/

190
src/bin/pg_dump/pg_dump.c
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@ -12,7 +12,7 @@
* by PostgreSQL
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/bin/pg_dump/pg_dump.c,v 1.316 2003/02/11 21:06:58 petere Exp $
* $Header: /cvsroot/pgsql/src/bin/pg_dump/pg_dump.c,v 1.317 2003/02/13 04:54:16 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -70,6 +70,7 @@ typedef struct _dumpContext
} DumpContext;
static void help(const char *progname);
static void formatIdentifierArg(char *identifier);
static NamespaceInfo *findNamespace(const char *nsoid, const char *objoid);
static void dumpClasses(const TableInfo *tblinfo, const int numTables,
Archive *fout, const bool oids);
@ -144,7 +145,8 @@ bool aclsSkip;
/* obsolete as of 7.3: */
static Oid g_last_builtin_oid; /* value of the last builtin oid */
static char *selectTablename = NULL; /* name of a single table to dump */
static char *selectTableName = NULL; /* name of a single table to dump */
static char *selectSchemaName = NULL; /* name of a single schema to dump */
char g_opaque_type[10]; /* name for the opaque type */
@ -202,6 +204,7 @@ main(int argc, char **argv)
{"oids", no_argument, NULL, 'o'},
{"no-owner", no_argument, NULL, 'O'},
{"port", required_argument, NULL, 'p'},
{"schema", required_argument, NULL, 'n'},
{"schema-only", no_argument, NULL, 's'},
{"superuser", required_argument, NULL, 'S'},
{"table", required_argument, NULL, 't'},
@ -265,7 +268,7 @@ main(int argc, char **argv)
}
}
while ((c = getopt_long(argc, argv, "abcCdDf:F:h:ioOp:RsS:t:uU:vWxX:Z:",
while ((c = getopt_long(argc, argv, "abcCdDf:F:h:in:oOp:RsS:t:uU:vWxX:Z:",
long_options, &optindex)) != -1)
{
switch (c)
@ -313,6 +316,11 @@ main(int argc, char **argv)
ignore_version = true;
break;
case 'n': /* Dump data for this schema only */
selectSchemaName = strdup(optarg);
formatIdentifierArg(selectSchemaName);
break;
case 'o': /* Dump oids */
oids = true;
break;
@ -339,39 +347,18 @@ main(int argc, char **argv)
break;
case 't': /* Dump data for this table only */
{
int i;
selectTablename = strdup(optarg);
/*
* quoted string? Then strip quotes and preserve
* case...
*/
if (selectTablename[0] == '"')
{
char *endptr;
endptr = selectTablename + strlen(selectTablename) - 1;
if (*endptr == '"')
*endptr = '\0';
strcpy(selectTablename, &selectTablename[1]);
}
else
{
/* otherwise, convert table name to lowercase... */
for (i = 0; selectTablename[i]; i++)
if (isupper((unsigned char) selectTablename[i]))
selectTablename[i] = tolower((unsigned char) selectTablename[i]);
selectTableName = strdup(optarg);
/*
* '*' is a special case meaning ALL tables, but
* only if unquoted
*/
if (strcmp(selectTablename, "*") == 0)
selectTablename[0] = '\0';
}
}
if (selectTableName[0] != '"' &&
strcmp(selectTableName, "*") == 0)
selectTableName[0] = '\0';
else
formatIdentifierArg(selectTableName);
break;
case 'u':
@ -456,13 +443,27 @@ main(int argc, char **argv)
exit(1);
}
if (outputBlobs && selectTablename != NULL && strlen(selectTablename) > 0)
if (outputBlobs && selectTableName != NULL && strlen(selectTableName) > 0)
{
write_msg(NULL, "Large object output is not supported for a single table.\n");
write_msg(NULL, "Use all tables or a full dump instead.\n");
exit(1);
}
if (outputBlobs && selectSchemaName != NULL)
{
write_msg(NULL, "Large object output is not supported for a single schema.\n");
write_msg(NULL, "Use a full dump instead.\n");
exit(1);
}
if (selectTableName != NULL && selectSchemaName != NULL)
{
write_msg(NULL, "Single table and single schema dumps cannot be used simultaneously.\n");
write_msg(NULL, "Use one option or the other, not both.\n");
exit(1);
}
if (dumpData == true && oids == true)
{
write_msg(NULL, "INSERT (-d, -D) and OID (-o) options cannot be used together.\n");
@ -480,7 +481,6 @@ main(int argc, char **argv)
/* open the output file */
switch (format[0])
{
case 'c':
case 'C':
g_fout = CreateArchive(filename, archCustom, compressLevel);
@ -528,7 +528,8 @@ main(int argc, char **argv)
* Open the database using the Archiver, so it knows about it. Errors
* mean death.
*/
g_conn = ConnectDatabase(g_fout, dbname, pghost, pgport, username, force_password, ignore_version);
g_conn = ConnectDatabase(g_fout, dbname, pghost, pgport,
username, force_password, ignore_version);
/*
* Start serializable transaction to dump consistent data.
@ -667,6 +668,7 @@ help(const char *progname)
printf(_(" -C, --create include commands to create database in dump\n"));
printf(_(" -d, --inserts dump data as INSERT, rather than COPY, commands\n"));
printf(_(" -D, --column-inserts dump data as INSERT commands with column names\n"));
printf(_(" -n, --schema=SCHEMA dump this schema only\n"));
printf(_(" -o, --oids include OIDs in dump\n"));
printf(_(" -O, --no-owner do not output \\connect commands in plain\n"
" text format\n"));
@ -694,6 +696,38 @@ help(const char *progname)
printf(_("Report bugs to <pgsql-bugs@postgresql.org>.\n"));
}
/*
* Accepts an identifier as specified as a command-line argument, and
* converts it into a form acceptable to the PostgreSQL backend. The
* input string is modified in-place.
*/
static void
formatIdentifierArg(char *identifier)
{
/*
* quoted string? Then strip quotes and preserve
* case...
*/
if (identifier[0] == '"')
{
char *endptr;
endptr = identifier + strlen(identifier) - 1;
if (*endptr == '"')
*endptr = '\0';
strcpy(identifier, &identifier[1]);
}
else
{
int i;
/* otherwise, convert identifier name to lowercase... */
for (i = 0; identifier[i]; i++)
if (isupper((unsigned char) identifier[i]))
identifier[i] = tolower((unsigned char) identifier[i]);
}
}
void
exit_nicely(void)
{
@ -712,10 +746,18 @@ selectDumpableNamespace(NamespaceInfo *nsinfo)
{
/*
* If a specific table is being dumped, do not dump any complete
* namespaces. Otherwise, dump all non-system namespaces.
* namespaces. If a specific namespace is being dumped, dump just
* that namespace. Otherwise, dump all non-system namespaces.
*/
if (selectTablename != NULL)
if (selectTableName != NULL)
nsinfo->dump = false;
else if (selectSchemaName != NULL)
{
if (strcmp(nsinfo->nspname, selectSchemaName) == 0)
nsinfo->dump = true;
else
nsinfo->dump = false;
}
else if (strncmp(nsinfo->nspname, "pg_", 3) == 0 ||
strcmp(nsinfo->nspname, "information_schema") == 0)
nsinfo->dump = false;
@ -737,8 +779,8 @@ selectDumpableTable(TableInfo *tbinfo)
*/
if (tbinfo->relnamespace->dump)
tbinfo->dump = true;
else if (selectTablename != NULL)
tbinfo->dump = (strcmp(tbinfo->relname, selectTablename) == 0);
else if (selectTableName != NULL)
tbinfo->dump = (strcmp(tbinfo->relname, selectTableName) == 0);
else
tbinfo->dump = false;
}
@ -1444,6 +1486,25 @@ getNamespaces(int *numNamespaces)
nsinfo[i].nspname);
}
/*
* If the user attempted to dump a specific namespace, check to
* ensure that the specified namespace actually exists.
*/
if (selectSchemaName)
{
for (i = 0; i < ntups; i++)
if (strcmp(nsinfo[i].nspname, selectSchemaName) == 0)
break;
/* Didn't find a match */
if (i == ntups)
{
write_msg(NULL, "Specified schema \"%s\" does not exist.\n",
selectSchemaName);
exit_nicely();
}
}
PQclear(res);
destroyPQExpBuffer(query);
@ -2245,6 +2306,27 @@ getTables(int *numTables)
tblinfo[i].relname);
}
/*
* If the user is attempting to dump a specific table, check to
* ensure that the specified table actually exists (and is a table
* or a view, not a sequence).
*/
if (selectTableName)
{
for (i = 0; i < ntups; i++)
if (strcmp(tblinfo[i].relname, selectTableName) == 0 &&
tblinfo[i].relkind != 'S')
break;
/* Didn't find a match */
if (i == ntups)
{
write_msg(NULL, "Specified table \"%s\" does not exist.\n",
selectTableName);
exit_nicely();
}
}
PQclear(res);
destroyPQExpBuffer(query);
destroyPQExpBuffer(delqry);
@ -2602,7 +2684,7 @@ dumpComment(Archive *fout, const char *target,
* setting, instead.
*/
/*** Build query to find comment ***/
/* Build query to find comment */
query = createPQExpBuffer();
@ -2628,7 +2710,7 @@ dumpComment(Archive *fout, const char *target,
appendPQExpBuffer(query, "SELECT description FROM pg_description WHERE objoid = '%s'::oid", oid);
}
/*** Execute query ***/
/* Execute query */
res = PQexec(g_conn, query->data);
if (!res || PQresultStatus(res) != PGRES_TUPLES_OK)
@ -2638,7 +2720,7 @@ dumpComment(Archive *fout, const char *target,
exit_nicely();
}
/*** If a comment exists, build COMMENT ON statement ***/
/* If a comment exists, build COMMENT ON statement */
if (PQntuples(res) == 1)
{
@ -2685,7 +2767,7 @@ dumpTableComment(Archive *fout, TableInfo *tbinfo,
* setting, instead.
*/
/*** Build query to find comments ***/
/* Build query to find comments */
query = createPQExpBuffer();
target = createPQExpBuffer();
@ -2712,7 +2794,7 @@ dumpTableComment(Archive *fout, TableInfo *tbinfo,
appendPQExpBuffer(query, "SELECT description, 0 as objsubid FROM pg_description WHERE objoid = '%s'::oid", tbinfo->oid);
}
/*** Execute query ***/
/* Execute query */
res = PQexec(g_conn, query->data);
if (!res || PQresultStatus(res) != PGRES_TUPLES_OK)
@ -2724,7 +2806,7 @@ dumpTableComment(Archive *fout, TableInfo *tbinfo,
i_description = PQfnumber(res, "description");
i_objsubid = PQfnumber(res, "objsubid");
/*** If comments exist, build COMMENT ON statements ***/
/* If comments exist, build COMMENT ON statements */
ntups = PQntuples(res);
for (i = 0; i < ntups; i++)
@ -2789,13 +2871,13 @@ dumpDBComment(Archive *fout)
/* Make sure we are in proper schema */
selectSourceSchema("pg_catalog");
/*** Build query to find comment ***/
/* Build query to find comment */
query = createPQExpBuffer();
appendPQExpBuffer(query, "SELECT oid FROM pg_database WHERE datname = ");
appendStringLiteral(query, PQdb(g_conn), true);
/*** Execute query ***/
/* Execute query */
res = PQexec(g_conn, query->data);
if (!res || PQresultStatus(res) != PGRES_TUPLES_OK)
@ -2805,7 +2887,7 @@ dumpDBComment(Archive *fout)
exit_nicely();
}
/*** If a comment exists, build COMMENT ON statement ***/
/* If a comment exists, build COMMENT ON statement */
if (PQntuples(res) != 0)
{
@ -2873,7 +2955,7 @@ dumpNamespaces(Archive *fout, NamespaceInfo *nsinfo, int numNamespaces)
nspinfo->usename, "SCHEMA", NULL,
q->data, delq->data, NULL, NULL, NULL);
/*** Dump Schema Comments ***/
/* Dump Schema Comments */
resetPQExpBuffer(q);
appendPQExpBuffer(q, "SCHEMA %s", qnspname);
dumpComment(fout, q->data,
@ -3092,7 +3174,7 @@ dumpOneBaseType(Archive *fout, TypeInfo *tinfo,
tinfo->usename, "TYPE", deps,
q->data, delq->data, NULL, NULL, NULL);
/*** Dump Type Comments ***/
/* Dump Type Comments */
resetPQExpBuffer(q);
appendPQExpBuffer(q, "TYPE %s", fmtId(tinfo->typname));
@ -3231,7 +3313,7 @@ dumpOneDomain(Archive *fout, TypeInfo *tinfo)
tinfo->usename, "DOMAIN", deps,
q->data, delq->data, NULL, NULL, NULL);
/*** Dump Domain Comments ***/
/* Dump Domain Comments */
resetPQExpBuffer(q);
appendPQExpBuffer(q, "DOMAIN %s", fmtId(tinfo->typname));
@ -3328,7 +3410,7 @@ dumpOneCompositeType(Archive *fout, TypeInfo *tinfo)
tinfo->usename, "TYPE", NULL,
q->data, delq->data, NULL, NULL, NULL);
/*** Dump Type Comments ***/
/* Dump Type Comments */
resetPQExpBuffer(q);
appendPQExpBuffer(q, "TYPE %s", fmtId(tinfo->typname));
@ -3775,7 +3857,7 @@ dumpOneFunc(Archive *fout, FuncInfo *finfo)
q->data, delqry->data,
NULL, NULL, NULL);
/*** Dump Function Comments ***/
/* Dump Function Comments */
resetPQExpBuffer(q);
appendPQExpBuffer(q, "FUNCTION %s", funcsig);
@ -4153,7 +4235,7 @@ dumpOneOpr(Archive *fout, OprInfo *oprinfo,
q->data, delq->data,
NULL, NULL, NULL);
/*** Dump Operator Comments ***/
/* Dump Operator Comments */
resetPQExpBuffer(q);
appendPQExpBuffer(q, "OPERATOR %s", oprid->data);
@ -4754,7 +4836,7 @@ dumpOneAgg(Archive *fout, AggInfo *agginfo)
q->data, delq->data,
NULL, NULL, NULL);
/*** Dump Aggregate Comments ***/
/* Dump Aggregate Comments */
resetPQExpBuffer(q);
appendPQExpBuffer(q, "AGGREGATE %s", aggsig);

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