#include "lib/stringinfo.h"
#include "miscadmin.h"
#include "storage/bufmgr.h"
+#include "utils/acl.h"
#include "utils/builtins.h"
#include "utils/lsyscache.h"
#include "utils/rel.h"
+#include "utils/syscache.h"
#include "utils/tqual.h"
* form "(key_name, ...)=(key_value, ...)". This is currently used
* for building unique-constraint and exclusion-constraint error messages.
*
+ * Note that if the user does not have permissions to view all of the
+ * columns involved then a NULL is returned. Returning a partial key seems
+ * unlikely to be useful and we have no way to know which of the columns the
+ * user provided (unlike in ExecBuildSlotValueDescription).
+ *
* The passed-in values/nulls arrays are the "raw" input to the index AM,
* e.g. results of FormIndexDatum --- this is not necessarily what is stored
* in the index, but it's what the user perceives to be stored.
Datum *values, bool *isnull)
{
StringInfoData buf;
+ Form_pg_index idxrec;
+ HeapTuple ht_idx;
int natts = indexRelation->rd_rel->relnatts;
int i;
+ int keyno;
+ Oid indexrelid = RelationGetRelid(indexRelation);
+ Oid indrelid;
+ AclResult aclresult;
+
+ /*
+ * Check permissions- if the user does not have access to view all of the
+ * key columns then return NULL to avoid leaking data.
+ *
+ * First we need to check table-level SELECT access and then, if
+ * there is no access there, check column-level permissions.
+ */
+
+ /*
+ * Fetch the pg_index tuple by the Oid of the index
+ */
+ ht_idx = SearchSysCache1(INDEXRELID, ObjectIdGetDatum(indexrelid));
+ if (!HeapTupleIsValid(ht_idx))
+ elog(ERROR, "cache lookup failed for index %u", indexrelid);
+ idxrec = (Form_pg_index) GETSTRUCT(ht_idx);
+
+ indrelid = idxrec->indrelid;
+ Assert(indexrelid == idxrec->indexrelid);
+
+ /* Table-level SELECT is enough, if the user has it */
+ aclresult = pg_class_aclcheck(indrelid, GetUserId(), ACL_SELECT);
+ if (aclresult != ACLCHECK_OK)
+ {
+ /*
+ * No table-level access, so step through the columns in the
+ * index and make sure the user has SELECT rights on all of them.
+ */
+ for (keyno = 0; keyno < idxrec->indnatts; keyno++)
+ {
+ AttrNumber attnum = idxrec->indkey.values[keyno];
+
+ aclresult = pg_attribute_aclcheck(indrelid, attnum, GetUserId(),
+ ACL_SELECT);
+
+ if (aclresult != ACLCHECK_OK)
+ {
+ /* No access, so clean up and return */
+ ReleaseSysCache(ht_idx);
+ return NULL;
+ }
+ }
+ }
+ ReleaseSysCache(ht_idx);
initStringInfo(&buf);
appendStringInfo(&buf, "(%s)=(",
- pg_get_indexdef_columns(RelationGetRelid(indexRelation),
- true));
+ pg_get_indexdef_columns(indexrelid, true));
for (i = 0; i < natts; i++)
{
{
Datum values[INDEX_MAX_KEYS];
bool isnull[INDEX_MAX_KEYS];
+ char *key_desc;
index_deform_tuple(itup, RelationGetDescr(rel),
values, isnull);
+
+ key_desc = BuildIndexValueDescription(rel, values,
+ isnull);
+
ereport(ERROR,
(errcode(ERRCODE_UNIQUE_VIOLATION),
errmsg("duplicate key value violates unique constraint \"%s\"",
RelationGetRelationName(rel)),
- errdetail("Key %s already exists.",
- BuildIndexValueDescription(rel,
- values, isnull)),
+ key_desc ? errdetail("Key %s already exists.",
+ key_desc) : 0,
errtableconstraint(heapRel,
RelationGetRelationName(rel))));
}
int *defmap; /* array of default att numbers */
ExprState **defexprs; /* array of default att expressions */
bool volatile_defexprs; /* is any of defexprs volatile? */
+ List *range_table;
/*
* These variables are used to reduce overhead in textual COPY FROM.
bool pipe = (stmt->filename == NULL);
Relation rel;
Oid relid;
+ RangeTblEntry *rte;
/* Disallow COPY to/from file or program except to superusers. */
if (!pipe && !superuser())
{
TupleDesc tupDesc;
AclMode required_access = (is_from ? ACL_INSERT : ACL_SELECT);
- RangeTblEntry *rte;
List *attnums;
ListCell *cur;
cstate = BeginCopyFrom(rel, stmt->filename, stmt->is_program,
stmt->attlist, stmt->options);
+ cstate->range_table = list_make1(rte);
*processed = CopyFrom(cstate); /* copy from file to database */
EndCopyFrom(cstate);
}
cstate = BeginCopyTo(rel, stmt->query, queryString,
stmt->filename, stmt->is_program,
stmt->attlist, stmt->options);
+ cstate->range_table = list_make1(rte);
*processed = DoCopyTo(cstate); /* copy from database to file */
EndCopyTo(cstate);
}
estate->es_result_relations = resultRelInfo;
estate->es_num_result_relations = 1;
estate->es_result_relation_info = resultRelInfo;
+ estate->es_range_table = cstate->range_table;
/* Set up a tuple slot too */
myslot = ExecInitExtraTupleSlot(estate);
/* How many levels deep into trigger execution are we? */
static int MyTriggerDepth = 0;
+/*
+ * Note that this macro also exists in executor/execMain.c. There does not
+ * appear to be any good header to put it into, given the structures that
+ * it uses, so we let them be duplicated. Be sure to update both if one needs
+ * to be changed, however.
+ */
#define GetModifiedColumns(relinfo, estate) \
(rt_fetch((relinfo)->ri_RangeTableIndex, (estate)->es_range_table)->modifiedCols)
DestReceiver *dest);
static bool ExecCheckRTEPerms(RangeTblEntry *rte);
static void ExecCheckXactReadOnly(PlannedStmt *plannedstmt);
-static char *ExecBuildSlotValueDescription(TupleTableSlot *slot,
+static char *ExecBuildSlotValueDescription(Oid reloid,
+ TupleTableSlot *slot,
TupleDesc tupdesc,
+ Bitmapset *modifiedCols,
int maxfieldlen);
static void EvalPlanQualStart(EPQState *epqstate, EState *parentestate,
Plan *planTree);
+/*
+ * Note that this macro also exists in commands/trigger.c. There does not
+ * appear to be any good header to put it into, given the structures that
+ * it uses, so we let them be duplicated. Be sure to update both if one needs
+ * to be changed, however.
+ */
+#define GetModifiedColumns(relinfo, estate) \
+ (rt_fetch((relinfo)->ri_RangeTableIndex, (estate)->es_range_table)->modifiedCols)
+
/* end of local decls */
{
if (tupdesc->attrs[attrChk - 1]->attnotnull &&
slot_attisnull(slot, attrChk))
+ {
+ char *val_desc;
+ Bitmapset *modifiedCols;
+
+ modifiedCols = GetModifiedColumns(resultRelInfo, estate);
+ val_desc = ExecBuildSlotValueDescription(RelationGetRelid(rel),
+ slot,
+ tupdesc,
+ modifiedCols,
+ 64);
+
ereport(ERROR,
(errcode(ERRCODE_NOT_NULL_VIOLATION),
errmsg("null value in column \"%s\" violates not-null constraint",
NameStr(tupdesc->attrs[attrChk - 1]->attname)),
- errdetail("Failing row contains %s.",
- ExecBuildSlotValueDescription(slot,
- tupdesc,
- 64)),
+ val_desc ? errdetail("Failing row contains %s.", val_desc) : 0,
errtablecol(rel, attrChk)));
+ }
}
}
const char *failed;
if ((failed = ExecRelCheck(resultRelInfo, slot, estate)) != NULL)
+ {
+ char *val_desc;
+ Bitmapset *modifiedCols;
+
+ modifiedCols = GetModifiedColumns(resultRelInfo, estate);
+ val_desc = ExecBuildSlotValueDescription(RelationGetRelid(rel),
+ slot,
+ tupdesc,
+ modifiedCols,
+ 64);
ereport(ERROR,
(errcode(ERRCODE_CHECK_VIOLATION),
errmsg("new row for relation \"%s\" violates check constraint \"%s\"",
RelationGetRelationName(rel), failed),
- errdetail("Failing row contains %s.",
- ExecBuildSlotValueDescription(slot,
- tupdesc,
- 64)),
+ val_desc ? errdetail("Failing row contains %s.", val_desc) : 0,
errtableconstraint(rel, failed)));
+ }
}
}
* dropped columns. We used to use the slot's tuple descriptor to decode the
* data, but the slot's descriptor doesn't identify dropped columns, so we
* now need to be passed the relation's descriptor.
+ *
+ * Note that, like BuildIndexValueDescription, if the user does not have
+ * permission to view any of the columns involved, a NULL is returned. Unlike
+ * BuildIndexValueDescription, if the user has access to view a subset of the
+ * column involved, that subset will be returned with a key identifying which
+ * columns they are.
*/
static char *
-ExecBuildSlotValueDescription(TupleTableSlot *slot,
+ExecBuildSlotValueDescription(Oid reloid,
+ TupleTableSlot *slot,
TupleDesc tupdesc,
+ Bitmapset *modifiedCols,
int maxfieldlen)
{
StringInfoData buf;
+ StringInfoData collist;
bool write_comma = false;
+ bool write_comma_collist = false;
int i;
-
- /* Make sure the tuple is fully deconstructed */
- slot_getallattrs(slot);
+ AclResult aclresult;
+ bool table_perm = false;
+ bool any_perm = false;
initStringInfo(&buf);
appendStringInfoChar(&buf, '(');
+ /*
+ * Check if the user has permissions to see the row. Table-level SELECT
+ * allows access to all columns. If the user does not have table-level
+ * SELECT then we check each column and include those the user has SELECT
+ * rights on. Additionally, we always include columns the user provided
+ * data for.
+ */
+ aclresult = pg_class_aclcheck(reloid, GetUserId(), ACL_SELECT);
+ if (aclresult != ACLCHECK_OK)
+ {
+ /* Set up the buffer for the column list */
+ initStringInfo(&collist);
+ appendStringInfoChar(&collist, '(');
+ }
+ else
+ table_perm = any_perm = true;
+
+ /* Make sure the tuple is fully deconstructed */
+ slot_getallattrs(slot);
+
for (i = 0; i < tupdesc->natts; i++)
{
+ bool column_perm = false;
char *val;
int vallen;
if (tupdesc->attrs[i]->attisdropped)
continue;
- if (slot->tts_isnull[i])
- val = "null";
- else
+ if (!table_perm)
{
- Oid foutoid;
- bool typisvarlena;
+ /*
+ * No table-level SELECT, so need to make sure they either have
+ * SELECT rights on the column or that they have provided the
+ * data for the column. If not, omit this column from the error
+ * message.
+ */
+ aclresult = pg_attribute_aclcheck(reloid, tupdesc->attrs[i]->attnum,
+ GetUserId(), ACL_SELECT);
+ if (bms_is_member(tupdesc->attrs[i]->attnum - FirstLowInvalidHeapAttributeNumber,
+ modifiedCols) || aclresult == ACLCHECK_OK)
+ {
+ column_perm = any_perm = true;
- getTypeOutputInfo(tupdesc->attrs[i]->atttypid,
- &foutoid, &typisvarlena);
- val = OidOutputFunctionCall(foutoid, slot->tts_values[i]);
- }
+ if (write_comma_collist)
+ appendStringInfoString(&collist, ", ");
+ else
+ write_comma_collist = true;
- if (write_comma)
- appendStringInfoString(&buf, ", ");
- else
- write_comma = true;
+ appendStringInfoString(&collist, NameStr(tupdesc->attrs[i]->attname));
+ }
+ }
- /* truncate if needed */
- vallen = strlen(val);
- if (vallen <= maxfieldlen)
- appendStringInfoString(&buf, val);
- else
+ if (table_perm || column_perm)
{
- vallen = pg_mbcliplen(val, vallen, maxfieldlen);
- appendBinaryStringInfo(&buf, val, vallen);
- appendStringInfoString(&buf, "...");
+ if (slot->tts_isnull[i])
+ val = "null";
+ else
+ {
+ Oid foutoid;
+ bool typisvarlena;
+
+ getTypeOutputInfo(tupdesc->attrs[i]->atttypid,
+ &foutoid, &typisvarlena);
+ val = OidOutputFunctionCall(foutoid, slot->tts_values[i]);
+ }
+
+ if (write_comma)
+ appendStringInfoString(&buf, ", ");
+ else
+ write_comma = true;
+
+ /* truncate if needed */
+ vallen = strlen(val);
+ if (vallen <= maxfieldlen)
+ appendStringInfoString(&buf, val);
+ else
+ {
+ vallen = pg_mbcliplen(val, vallen, maxfieldlen);
+ appendBinaryStringInfo(&buf, val, vallen);
+ appendStringInfoString(&buf, "...");
+ }
}
}
+ /* If we end up with zero columns being returned, then return NULL. */
+ if (!any_perm)
+ return NULL;
+
appendStringInfoChar(&buf, ')');
+ if (!table_perm)
+ {
+ appendStringInfoString(&collist, ") = ");
+ appendStringInfoString(&collist, buf.data);
+
+ return collist.data;
+ }
+
return buf.data;
}
(errcode(ERRCODE_EXCLUSION_VIOLATION),
errmsg("could not create exclusion constraint \"%s\"",
RelationGetRelationName(index)),
- errdetail("Key %s conflicts with key %s.",
- error_new, error_existing),
+ error_new && error_existing ?
+ errdetail("Key %s conflicts with key %s.",
+ error_new, error_existing) :
+ errdetail("Key conflicts exist."),
errtableconstraint(heap,
RelationGetRelationName(index))));
else
(errcode(ERRCODE_EXCLUSION_VIOLATION),
errmsg("conflicting key value violates exclusion constraint \"%s\"",
RelationGetRelationName(index)),
- errdetail("Key %s conflicts with existing key %s.",
- error_new, error_existing),
+ error_new && error_existing ?
+ errdetail("Key %s conflicts with existing key %s.",
+ error_new, error_existing) :
+ errdetail("Key conflicts with existing key."),
errtableconstraint(heap,
RelationGetRelationName(index))));
}
#include "parser/parse_coerce.h"
#include "parser/parse_relation.h"
#include "miscadmin.h"
+#include "utils/acl.h"
#include "utils/builtins.h"
#include "utils/fmgroids.h"
#include "utils/guc.h"
bool onfk;
const int16 *attnums;
int idx;
+ Oid rel_oid;
+ AclResult aclresult;
+ bool has_perm = true;
if (spi_err)
ereport(ERROR,
if (onfk)
{
attnums = riinfo->fk_attnums;
+ rel_oid = fk_rel->rd_id;
if (tupdesc == NULL)
tupdesc = fk_rel->rd_att;
}
else
{
attnums = riinfo->pk_attnums;
+ rel_oid = pk_rel->rd_id;
if (tupdesc == NULL)
tupdesc = pk_rel->rd_att;
}
- /* Get printable versions of the keys involved */
- initStringInfo(&key_names);
- initStringInfo(&key_values);
- for (idx = 0; idx < riinfo->nkeys; idx++)
+ /*
+ * Check permissions- if the user does not have access to view the data in
+ * any of the key columns then we don't include the errdetail() below.
+ *
+ * Check table-level permissions first and, failing that, column-level
+ * privileges.
+ */
+ aclresult = pg_class_aclcheck(rel_oid, GetUserId(), ACL_SELECT);
+ if (aclresult != ACLCHECK_OK)
{
- int fnum = attnums[idx];
- char *name,
- *val;
+ /* Try for column-level permissions */
+ for (idx = 0; idx < riinfo->nkeys; idx++)
+ {
+ aclresult = pg_attribute_aclcheck(rel_oid, attnums[idx],
+ GetUserId(),
+ ACL_SELECT);
- name = SPI_fname(tupdesc, fnum);
- val = SPI_getvalue(violator, tupdesc, fnum);
- if (!val)
- val = "null";
+ /* No access to the key */
+ if (aclresult != ACLCHECK_OK)
+ {
+ has_perm = false;
+ break;
+ }
+ }
+ }
- if (idx > 0)
+ if (has_perm)
+ {
+ /* Get printable versions of the keys involved */
+ initStringInfo(&key_names);
+ initStringInfo(&key_values);
+ for (idx = 0; idx < riinfo->nkeys; idx++)
{
- appendStringInfoString(&key_names, ", ");
- appendStringInfoString(&key_values, ", ");
+ int fnum = attnums[idx];
+ char *name,
+ *val;
+
+ name = SPI_fname(tupdesc, fnum);
+ val = SPI_getvalue(violator, tupdesc, fnum);
+ if (!val)
+ val = "null";
+
+ if (idx > 0)
+ {
+ appendStringInfoString(&key_names, ", ");
+ appendStringInfoString(&key_values, ", ");
+ }
+ appendStringInfoString(&key_names, name);
+ appendStringInfoString(&key_values, val);
}
- appendStringInfoString(&key_names, name);
- appendStringInfoString(&key_values, val);
}
if (onfk)
errmsg("insert or update on table \"%s\" violates foreign key constraint \"%s\"",
RelationGetRelationName(fk_rel),
NameStr(riinfo->conname)),
- errdetail("Key (%s)=(%s) is not present in table \"%s\".",
- key_names.data, key_values.data,
- RelationGetRelationName(pk_rel)),
+ has_perm ?
+ errdetail("Key (%s)=(%s) is not present in table \"%s\".",
+ key_names.data, key_values.data,
+ RelationGetRelationName(pk_rel)) :
+ errdetail("Key is not present in table \"%s\".",
+ RelationGetRelationName(pk_rel)),
errtableconstraint(fk_rel, NameStr(riinfo->conname))));
else
ereport(ERROR,
RelationGetRelationName(pk_rel),
NameStr(riinfo->conname),
RelationGetRelationName(fk_rel)),
+ has_perm ?
errdetail("Key (%s)=(%s) is still referenced from table \"%s\".",
key_names.data, key_values.data,
+ RelationGetRelationName(fk_rel)) :
+ errdetail("Key is still referenced from table \"%s\".",
RelationGetRelationName(fk_rel)),
errtableconstraint(fk_rel, NameStr(riinfo->conname))));
}
{
Datum values[INDEX_MAX_KEYS];
bool isnull[INDEX_MAX_KEYS];
+ char *key_desc;
/*
* Some rather brain-dead implementations of qsort (such as the one in
Assert(tuple1 != tuple2);
index_deform_tuple(tuple1, tupDes, values, isnull);
+
+ key_desc = BuildIndexValueDescription(state->indexRel, values, isnull);
+
ereport(ERROR,
(errcode(ERRCODE_UNIQUE_VIOLATION),
errmsg("could not create unique index \"%s\"",
RelationGetRelationName(state->indexRel)),
- errdetail("Key %s is duplicated.",
- BuildIndexValueDescription(state->indexRel,
- values, isnull)),
+ key_desc ? errdetail("Key %s is duplicated.", key_desc) :
+ errdetail("Duplicate keys exist."),
errtableconstraint(state->heapRel,
RelationGetRelationName(state->indexRel))));
}
(0 rows)
COPY atest6 TO stdout; -- ok
+-- check error reporting with column privs
+SET SESSION AUTHORIZATION regressuser1;
+CREATE TABLE t1 (c1 int, c2 int, c3 int check (c3 < 5), primary key (c1, c2));
+GRANT SELECT (c1) ON t1 TO regressuser2;
+GRANT INSERT (c1, c2, c3) ON t1 TO regressuser2;
+GRANT UPDATE (c1, c2, c3) ON t1 TO regressuser2;
+-- seed data
+INSERT INTO t1 VALUES (1, 1, 1);
+INSERT INTO t1 VALUES (1, 2, 1);
+INSERT INTO t1 VALUES (2, 1, 2);
+INSERT INTO t1 VALUES (2, 2, 2);
+INSERT INTO t1 VALUES (3, 1, 3);
+SET SESSION AUTHORIZATION regressuser2;
+INSERT INTO t1 (c1, c2) VALUES (1, 1); -- fail, but row not shown
+ERROR: duplicate key value violates unique constraint "t1_pkey"
+UPDATE t1 SET c2 = 1; -- fail, but row not shown
+ERROR: duplicate key value violates unique constraint "t1_pkey"
+INSERT INTO t1 (c1, c2) VALUES (null, null); -- fail, but see columns being inserted
+ERROR: null value in column "c1" violates not-null constraint
+DETAIL: Failing row contains (c1, c2) = (null, null).
+INSERT INTO t1 (c3) VALUES (null); -- fail, but see columns being inserted or have SELECT
+ERROR: null value in column "c1" violates not-null constraint
+DETAIL: Failing row contains (c1, c3) = (null, null).
+INSERT INTO t1 (c1) VALUES (5); -- fail, but see columns being inserted or have SELECT
+ERROR: null value in column "c2" violates not-null constraint
+DETAIL: Failing row contains (c1) = (5).
+UPDATE t1 SET c3 = 10; -- fail, but see columns with SELECT rights, or being modified
+ERROR: new row for relation "t1" violates check constraint "t1_c3_check"
+DETAIL: Failing row contains (c1, c3) = (1, 10).
+SET SESSION AUTHORIZATION regressuser1;
+DROP TABLE t1;
-- test column-level privileges when involved with DELETE
SET SESSION AUTHORIZATION regressuser1;
ALTER TABLE atest6 ADD COLUMN three integer;
SELECT atest6 FROM atest6; -- ok
COPY atest6 TO stdout; -- ok
+-- check error reporting with column privs
+SET SESSION AUTHORIZATION regressuser1;
+CREATE TABLE t1 (c1 int, c2 int, c3 int check (c3 < 5), primary key (c1, c2));
+GRANT SELECT (c1) ON t1 TO regressuser2;
+GRANT INSERT (c1, c2, c3) ON t1 TO regressuser2;
+GRANT UPDATE (c1, c2, c3) ON t1 TO regressuser2;
+
+-- seed data
+INSERT INTO t1 VALUES (1, 1, 1);
+INSERT INTO t1 VALUES (1, 2, 1);
+INSERT INTO t1 VALUES (2, 1, 2);
+INSERT INTO t1 VALUES (2, 2, 2);
+INSERT INTO t1 VALUES (3, 1, 3);
+
+SET SESSION AUTHORIZATION regressuser2;
+INSERT INTO t1 (c1, c2) VALUES (1, 1); -- fail, but row not shown
+UPDATE t1 SET c2 = 1; -- fail, but row not shown
+INSERT INTO t1 (c1, c2) VALUES (null, null); -- fail, but see columns being inserted
+INSERT INTO t1 (c3) VALUES (null); -- fail, but see columns being inserted or have SELECT
+INSERT INTO t1 (c1) VALUES (5); -- fail, but see columns being inserted or have SELECT
+UPDATE t1 SET c3 = 10; -- fail, but see columns with SELECT rights, or being modified
+
+SET SESSION AUTHORIZATION regressuser1;
+DROP TABLE t1;
+
-- test column-level privileges when involved with DELETE
SET SESSION AUTHORIZATION regressuser1;
ALTER TABLE atest6 ADD COLUMN three integer;
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