mirror of https://github.com/postgres/postgres
Fix ALTER TABLE ADD COLUMN to disallow the same column types that are
disallowed by CREATE TABLE (eg, pseudo-types); also disallow these types from being introduced by the range-function syntax. While at it, allow CREATE TABLE to create zero-column tables, per recent pghackers discussion. I am back-patching this into 7.3 since failure to disallow pseudo-types is arguably a security hole.
This commit is contained in:
Tom Lane
parent
88177f77b1
commit
260faf0b63
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@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/catalog/heap.c,v 1.237 2002/12/12 20:35:08 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/catalog/heap.c,v 1.238 2002/12/16 18:39:22 tgl Exp $
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*
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*
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* INTERFACE ROUTINES
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@ -307,8 +307,8 @@ heap_storage_create(Relation rel)
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*
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* this is done in 6 steps:
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*
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* 1) CheckAttributeNames() is used to make certain the tuple
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* descriptor contains a valid set of attribute names
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* 1) CheckAttributeNamesTypes() is used to make certain the tuple
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* descriptor contains a valid set of attribute names and types
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*
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* 2) pg_class is opened and get_relname_relid()
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* performs a scan to ensure that no relation with the
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@ -334,20 +334,25 @@ heap_storage_create(Relation rel)
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*/
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/* --------------------------------
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* CheckAttributeNames
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* CheckAttributeNamesTypes
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*
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* this is used to make certain the tuple descriptor contains a
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* valid set of attribute names. a problem simply generates
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* elog(ERROR) which aborts the current transaction.
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* valid set of attribute names and datatypes. a problem simply
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* generates elog(ERROR) which aborts the current transaction.
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* --------------------------------
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*/
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static void
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CheckAttributeNames(TupleDesc tupdesc, char relkind)
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void
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CheckAttributeNamesTypes(TupleDesc tupdesc, char relkind)
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{
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int i;
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int j;
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int natts = tupdesc->natts;
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/* Sanity check on column count */
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if (natts < 0 || natts > MaxHeapAttributeNumber)
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elog(ERROR, "Number of columns is out of range (0 to %d)",
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MaxHeapAttributeNumber);
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/*
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* first check for collision with system attribute names
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*
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@ -380,8 +385,29 @@ CheckAttributeNames(TupleDesc tupdesc, char relkind)
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}
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/*
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* We also do some checking of the attribute types here.
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* next check the attribute types
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*/
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for (i = 0; i < natts; i++)
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{
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CheckAttributeType(NameStr(tupdesc->attrs[i]->attname),
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tupdesc->attrs[i]->atttypid);
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}
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}
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/* --------------------------------
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* CheckAttributeType
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*
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* Verify that the proposed datatype of an attribute is legal.
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* This is needed because there are types (and pseudo-types)
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* in the catalogs that we do not support as elements of real tuples.
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* --------------------------------
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*/
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void
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CheckAttributeType(const char *attname, Oid atttypid)
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{
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char att_typtype = get_typtype(atttypid);
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/*
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* Warn user, but don't fail, if column to be created has UNKNOWN type
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* (usually as a result of a 'retrieve into' - jolly)
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*
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@ -390,28 +416,20 @@ CheckAttributeNames(TupleDesc tupdesc, char relkind)
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* all references to complex types, but for now there's still some
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* Berkeley-derived code that thinks it can do this...)
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*/
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for (i = 0; i < natts; i++)
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{
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Oid att_type = tupdesc->attrs[i]->atttypid;
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char att_typtype = get_typtype(att_type);
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if (att_type == UNKNOWNOID)
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if (atttypid == UNKNOWNOID)
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elog(WARNING, "Attribute \"%s\" has an unknown type"
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"\n\tProceeding with relation creation anyway",
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NameStr(tupdesc->attrs[i]->attname));
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if (att_typtype == 'p')
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attname);
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else if (att_typtype == 'p')
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elog(ERROR, "Attribute \"%s\" has pseudo-type %s",
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NameStr(tupdesc->attrs[i]->attname),
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format_type_be(att_type));
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if (att_typtype == 'c')
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attname, format_type_be(atttypid));
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else if (att_typtype == 'c')
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{
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Oid typrelid = get_typ_typrelid(att_type);
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Oid typrelid = get_typ_typrelid(atttypid);
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if (get_rel_relkind(typrelid) == RELKIND_COMPOSITE_TYPE)
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elog(ERROR, "Attribute \"%s\" has composite type %s",
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NameStr(tupdesc->attrs[i]->attname),
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format_type_be(att_type));
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}
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attname, format_type_be(atttypid));
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}
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}
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@ -689,11 +707,8 @@ heap_create_with_catalog(const char *relname,
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* sanity checks
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*/
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Assert(IsNormalProcessingMode() || IsBootstrapProcessingMode());
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if (tupdesc->natts <= 0 || tupdesc->natts > MaxHeapAttributeNumber)
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elog(ERROR, "Number of columns is out of range (1 to %d)",
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MaxHeapAttributeNumber);
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CheckAttributeNames(tupdesc, relkind);
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CheckAttributeNamesTypes(tupdesc, relkind);
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if (get_relname_relid(relname, relnamespace))
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elog(ERROR, "Relation '%s' already exists", relname);
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@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/commands/tablecmds.c,v 1.61 2002/12/15 16:17:42 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/commands/tablecmds.c,v 1.62 2002/12/16 18:39:22 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -125,7 +125,6 @@ DefineRelation(CreateStmt *stmt, char relkind)
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char relname[NAMEDATALEN];
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Oid namespaceId;
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List *schema = stmt->tableElts;
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int numberOfAttributes;
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Oid relationId;
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Relation rel;
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TupleDesc descriptor;
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@ -174,10 +173,6 @@ DefineRelation(CreateStmt *stmt, char relkind)
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stmt->relation->istemp,
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&inheritOids, &old_constraints, &parentHasOids);
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numberOfAttributes = length(schema);
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if (numberOfAttributes <= 0)
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elog(ERROR, "DefineRelation: please inherit from a relation or define an attribute");
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/*
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* Create a relation descriptor from the relation schema and create
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* the relation. Note that in this stage only inherited (pre-cooked)
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@ -1800,6 +1795,9 @@ AlterTableAddColumn(Oid myrelid,
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typeTuple = typenameType(colDef->typename);
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tform = (Form_pg_type) GETSTRUCT(typeTuple);
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/* make sure datatype is legal for a column */
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CheckAttributeType(colDef->colname, HeapTupleGetOid(typeTuple));
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attributeTuple = heap_addheader(Natts_pg_attribute,
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false,
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ATTRIBUTE_TUPLE_SIZE,
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@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/parser/parse_clause.c,v 1.102 2002/12/12 20:35:13 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/parser/parse_clause.c,v 1.103 2002/12/16 18:39:22 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -16,6 +16,7 @@
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#include "postgres.h"
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#include "access/heapam.h"
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#include "catalog/heap.h"
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#include "nodes/makefuncs.h"
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#include "optimizer/clauses.h"
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#include "optimizer/tlist.h"
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@ -502,6 +503,18 @@ transformRangeFunction(ParseState *pstate, RangeFunction *r)
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elog(ERROR, "cannot use aggregate function in FROM function expression");
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}
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/*
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* If a coldeflist is supplied, ensure it defines a legal set of names
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* (no duplicates) and datatypes (no pseudo-types, for instance).
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*/
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if (r->coldeflist)
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{
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TupleDesc tupdesc;
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tupdesc = BuildDescForRelation(r->coldeflist);
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CheckAttributeNamesTypes(tupdesc, RELKIND_COMPOSITE_TYPE);
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}
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/*
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* OK, build an RTE for the function.
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*/
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@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/utils/cache/relcache.c,v 1.182 2002/12/15 21:01:34 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/utils/cache/relcache.c,v 1.183 2002/12/16 18:39:22 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -570,6 +570,7 @@ RelationBuildTupleDesc(RelationBuildDescInfo buildinfo,
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* cases for attnum=1 that used to exist in fastgetattr() and
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* index_getattr().
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*/
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if (relation->rd_rel->relnatts > 0)
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relation->rd_att->attrs[0]->attcacheoff = 0;
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/*
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@ -2049,7 +2050,7 @@ RelationBuildLocalRelation(const char *relname,
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int i;
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bool has_not_null;
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AssertArg(natts > 0);
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AssertArg(natts >= 0);
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/*
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* switch to the cache context to create the relcache entry.
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@ -7,7 +7,7 @@
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* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $Id: heap.h,v 1.59 2002/11/11 22:19:23 tgl Exp $
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* $Id: heap.h,v 1.60 2002/12/16 18:39:22 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -74,4 +74,8 @@ extern Form_pg_attribute SystemAttributeDefinition(AttrNumber attno,
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extern Form_pg_attribute SystemAttributeByName(const char *attname,
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bool relhasoids);
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extern void CheckAttributeNamesTypes(TupleDesc tupdesc, char relkind);
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extern void CheckAttributeType(const char *attname, Oid atttypid);
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#endif /* HEAP_H */
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