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Teach pg_dump to quote reloption values safely.

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Commit c7e27becd2e6eb93 fixed this on the backend side, but we neglected
the fact that several code paths in pg_dump were printing reloptions
values that had not gotten massaged by ruleutils.  Apply essentially the
same quoting logic in those places, too.
This commit is contained in:
Tom Lane 2016-01-02 19:04:45 -05:00
parent aa078a9f45
commit e4959fb5cb
2 changed files with 113 additions and 28 deletions
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139
src/bin/pg_dump/pg_dump.c
View File

@ -245,6 +245,9 @@ static void binary_upgrade_extension_member(PQExpBuffer upgrade_buffer,
const char *objlabel);
static const char *getAttrName(int attrnum, TableInfo *tblInfo);
static const char *fmtCopyColumnList(const TableInfo *ti);
static bool nonemptyReloptions(const char *reloptions);
static void fmtReloptionsArray(Archive *fout, PQExpBuffer buffer,
const char *reloptions, const char *prefix);
static void do_sql_command(PGconn *conn, const char *query);
static void check_sql_result(PGresult *res, PGconn *conn, const char *query,
ExecStatusType expected);
@ -3956,8 +3959,8 @@ getTables(int *numTables)
"d.refobjid AS owning_tab, "
"d.refobjsubid AS owning_col, "
"(SELECT spcname FROM pg_tablespace t WHERE t.oid = c.reltablespace) AS reltablespace, "
"array_to_string(c.reloptions, ', ') AS reloptions, "
"array_to_string(array(SELECT 'toast.' || x FROM unnest(tc.reloptions) x), ', ') AS toast_reloptions "
"c.reloptions AS reloptions, "
"tc.reloptions AS toast_reloptions "
"FROM pg_class c "
"LEFT JOIN pg_depend d ON "
"(c.relkind = '%c' AND "
@ -3992,8 +3995,8 @@ getTables(int *numTables)
"d.refobjid AS owning_tab, "
"d.refobjsubid AS owning_col, "
"(SELECT spcname FROM pg_tablespace t WHERE t.oid = c.reltablespace) AS reltablespace, "
"array_to_string(c.reloptions, ', ') AS reloptions, "
"array_to_string(array(SELECT 'toast.' || x FROM unnest(tc.reloptions) x), ', ') AS toast_reloptions "
"c.reloptions AS reloptions, "
"tc.reloptions AS toast_reloptions "
"FROM pg_class c "
"LEFT JOIN pg_depend d ON "
"(c.relkind = '%c' AND "
@ -4027,8 +4030,8 @@ getTables(int *numTables)
"d.refobjid AS owning_tab, "
"d.refobjsubid AS owning_col, "
"(SELECT spcname FROM pg_tablespace t WHERE t.oid = c.reltablespace) AS reltablespace, "
"array_to_string(c.reloptions, ', ') AS reloptions, "
"array_to_string(array(SELECT 'toast.' || x FROM unnest(tc.reloptions) x), ', ') AS toast_reloptions "
"c.reloptions AS reloptions, "
"tc.reloptions AS toast_reloptions "
"FROM pg_class c "
"LEFT JOIN pg_depend d ON "
"(c.relkind = '%c' AND "
@ -4062,7 +4065,7 @@ getTables(int *numTables)
"d.refobjid AS owning_tab, "
"d.refobjsubid AS owning_col, "
"(SELECT spcname FROM pg_tablespace t WHERE t.oid = c.reltablespace) AS reltablespace, "
"array_to_string(c.reloptions, ', ') AS reloptions, "
"c.reloptions AS reloptions, "
"NULL AS toast_reloptions "
"FROM pg_class c "
"LEFT JOIN pg_depend d ON "
@ -4497,7 +4500,7 @@ getIndexes(TableInfo tblinfo[], int numTables)
i_conoid,
i_condef,
i_tablespace,
i_options;
i_indreloptions;
int ntups;
for (i = 0; i < numTables; i++)
@ -4545,7 +4548,7 @@ getIndexes(TableInfo tblinfo[], int numTables)
"c.oid AS conoid, "
"pg_catalog.pg_get_constraintdef(c.oid, false) AS condef, "
"(SELECT spcname FROM pg_catalog.pg_tablespace s WHERE s.oid = t.reltablespace) AS tablespace, "
"array_to_string(t.reloptions, ', ') AS options "
"t.reloptions AS indreloptions "
"FROM pg_catalog.pg_index i "
"JOIN pg_catalog.pg_class t ON (t.oid = i.indexrelid) "
"LEFT JOIN pg_catalog.pg_constraint c "
@ -4571,7 +4574,7 @@ getIndexes(TableInfo tblinfo[], int numTables)
"c.oid AS conoid, "
"null AS condef, "
"(SELECT spcname FROM pg_catalog.pg_tablespace s WHERE s.oid = t.reltablespace) AS tablespace, "
"array_to_string(t.reloptions, ', ') AS options "
"t.reloptions AS indreloptions "
"FROM pg_catalog.pg_index i "
"JOIN pg_catalog.pg_class t ON (t.oid = i.indexrelid) "
"LEFT JOIN pg_catalog.pg_depend d "
@ -4600,7 +4603,7 @@ getIndexes(TableInfo tblinfo[], int numTables)
"c.oid AS conoid, "
"null AS condef, "
"(SELECT spcname FROM pg_catalog.pg_tablespace s WHERE s.oid = t.reltablespace) AS tablespace, "
"null AS options "
"null AS indreloptions "
"FROM pg_catalog.pg_index i "
"JOIN pg_catalog.pg_class t ON (t.oid = i.indexrelid) "
"LEFT JOIN pg_catalog.pg_depend d "
@ -4628,7 +4631,7 @@ getIndexes(TableInfo tblinfo[], int numTables)
"c.oid AS conoid, "
"null AS condef, "
"NULL AS tablespace, "
"null AS options "
"null AS indreloptions "
"FROM pg_catalog.pg_index i "
"JOIN pg_catalog.pg_class t ON (t.oid = i.indexrelid) "
"LEFT JOIN pg_catalog.pg_depend d "
@ -4659,7 +4662,7 @@ getIndexes(TableInfo tblinfo[], int numTables)
"t.oid AS conoid, "
"null AS condef, "
"NULL AS tablespace, "
"null AS options "
"null AS indreloptions "
"FROM pg_index i, pg_class t "
"WHERE t.oid = i.indexrelid "
"AND i.indrelid = '%u'::oid "
@ -4685,7 +4688,7 @@ getIndexes(TableInfo tblinfo[], int numTables)
"t.oid AS conoid, "
"null AS condef, "
"NULL AS tablespace, "
"null AS options "
"null AS indreloptions "
"FROM pg_index i, pg_class t "
"WHERE t.oid = i.indexrelid "
"AND i.indrelid = '%u'::oid "
@ -4713,7 +4716,7 @@ getIndexes(TableInfo tblinfo[], int numTables)
i_conoid = PQfnumber(res, "conoid");
i_condef = PQfnumber(res, "condef");
i_tablespace = PQfnumber(res, "tablespace");
i_options = PQfnumber(res, "options");
i_indreloptions = PQfnumber(res, "indreloptions");
indxinfo = (IndxInfo *) malloc(ntups * sizeof(IndxInfo));
constrinfo = (ConstraintInfo *) malloc(ntups * sizeof(ConstraintInfo));
@ -4732,7 +4735,7 @@ getIndexes(TableInfo tblinfo[], int numTables)
indxinfo[j].indexdef = strdup(PQgetvalue(res, j, i_indexdef));
indxinfo[j].indnkeys = atoi(PQgetvalue(res, j, i_indnkeys));
indxinfo[j].tablespace = strdup(PQgetvalue(res, j, i_tablespace));
indxinfo[j].options = strdup(PQgetvalue(res, j, i_options));
indxinfo[j].indreloptions = strdup(PQgetvalue(res, j, i_indreloptions));
/*
* In pre-7.4 releases, indkeys may contain more entries than
@ -12448,23 +12451,24 @@ dumpTableSchema(Archive *fout, TableInfo *tbinfo)
if (tbinfo->relkind == RELKIND_FOREIGN_TABLE)
appendPQExpBuffer(q, "\nSERVER %s", fmtId(srvname));
if ((tbinfo->reloptions && strlen(tbinfo->reloptions) > 0) ||
(tbinfo->toast_reloptions && strlen(tbinfo->toast_reloptions) > 0))
if (nonemptyReloptions(tbinfo->reloptions) ||
nonemptyReloptions(tbinfo->toast_reloptions))
{
bool addcomma = false;
appendPQExpBuffer(q, "\nWITH (");
if (tbinfo->reloptions && strlen(tbinfo->reloptions) > 0)
appendPQExpBufferStr(q, "\nWITH (");
if (nonemptyReloptions(tbinfo->reloptions))
{
addcomma = true;
appendPQExpBuffer(q, "%s", tbinfo->reloptions);
fmtReloptionsArray(fout, q, tbinfo->reloptions, "");
}
if (tbinfo->toast_reloptions && strlen(tbinfo->toast_reloptions) > 0)
if (nonemptyReloptions(tbinfo->toast_reloptions))
{
appendPQExpBuffer(q, "%s%s", addcomma ? ", " : "",
tbinfo->toast_reloptions);
if (addcomma)
appendPQExpBufferStr(q, ", ");
fmtReloptionsArray(fout, q, tbinfo->toast_reloptions, "toast.");
}
appendPQExpBuffer(q, ")");
appendPQExpBufferChar(q, ')');
}
/* Dump generic options if any */
@ -12959,8 +12963,12 @@ dumpConstraint(Archive *fout, ConstraintInfo *coninfo)
appendPQExpBuffer(q, ")");
if (indxinfo->options && strlen(indxinfo->options) > 0)
appendPQExpBuffer(q, " WITH (%s)", indxinfo->options);
if (nonemptyReloptions(indxinfo->indreloptions))
{
appendPQExpBufferStr(q, " WITH (");
fmtReloptionsArray(fout, q, indxinfo->indreloptions, "");
appendPQExpBufferChar(q, ')');
}
if (coninfo->condeferrable)
{
@ -14572,6 +14580,83 @@ fmtCopyColumnList(const TableInfo *ti)
return q->data;
}
/*
* Check if a reloptions array is nonempty.
*/
static bool
nonemptyReloptions(const char *reloptions)
{
/* Don't want to print it if it's just "{}" */
return (reloptions != NULL && strlen(reloptions) > 2);
}
/*
* Format a reloptions array and append it to the given buffer.
*
* "prefix" is prepended to the option names; typically it's "" or "toast.".
*
* Note: this logic should generally match the backend's flatten_reloptions()
* (in adt/ruleutils.c).
*/
static void
fmtReloptionsArray(Archive *fout, PQExpBuffer buffer, const char *reloptions,
const char *prefix)
{
char **options;
int noptions;
int i;
if (!parsePGArray(reloptions, &options, &noptions))
{
write_msg(NULL, "WARNING: could not parse reloptions array\n");
if (options)
free(options);
return;
}
for (i = 0; i < noptions; i++)
{
char *option = options[i];
char *name;
char *separator;
char *value;
/*
* Each array element should have the form name=value. If the "=" is
* missing for some reason, treat it like an empty value.
*/
name = option;
separator = strchr(option, '=');
if (separator)
{
*separator = '\0';
value = separator + 1;
}
else
value = "";
if (i > 0)
appendPQExpBufferStr(buffer, ", ");
appendPQExpBuffer(buffer, "%s%s=", prefix, fmtId(name));
/*
* In general we need to quote the value; but to avoid unnecessary
* clutter, do not quote if it is an identifier that would not need
* quoting. (We could also allow numbers, but that is a bit trickier
* than it looks --- for example, are leading zeroes significant? We
* don't want to assume very much here about what custom reloptions
* might mean.)
*/
if (strcmp(fmtId(value), value) == 0)
appendPQExpBufferStr(buffer, value);
else
appendStringLiteralAH(buffer, value, fout);
}
if (options)
free(options);
}
/*
* Convenience subroutine to execute a SQL command and check for
* COMMAND_OK status.

2
src/bin/pg_dump/pg_dump.h
View File

@ -313,7 +313,7 @@ typedef struct _indxInfo
TableInfo *indextable; /* link to table the index is for */
char *indexdef;
char *tablespace; /* tablespace in which index is stored */
char *options; /* options specified by WITH (...) */
char *indreloptions; /* options specified by WITH (...) */
int indnkeys;
Oid *indkeys;
bool indisclustered;