*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/commands/Attic/command.c,v 1.144 2001/10/12 00:07:14 tgl Exp $
+ * $Header: /cvsroot/pgsql/src/backend/commands/Attic/command.c,v 1.145 2001/10/23 17:39:02 tgl Exp $
*
* NOTES
* The PerformAddAttribute() code, like most of the relation
bool istemp = is_temp_rel_name(relationName);
List *indexoidlist;
List *indexoidscan;
- Form_pg_attribute *rel_attrs;
- int num_keys = 0;
- int keys_matched = 0;
+ int num_keys;
bool index_found = false;
bool index_found_unique = false;
bool index_found_primary = false;
* constraint
*/
- rel_attrs = rel->rd_att->attrs;
-
- /* Retrieve the oids of all indices on the relation */
+ /* Loop over all indices on the relation */
indexoidlist = RelationGetIndexList(rel);
- index_found = false;
- index_found_unique = false;
- index_found_primary = false;
- /* Loop over all indices on the relation */
foreach(indexoidscan, indexoidlist)
{
Oid indexoid = lfirsti(indexoidscan);
* Make sure this index has the same number of
* keys as the constraint -- It obviously won't match otherwise.
*/
- for (i = 0; i < INDEX_MAX_KEYS && indexStruct->indkey[i] != 0; i++);
+ for (i = 0; i < INDEX_MAX_KEYS && indexStruct->indkey[i] != 0; i++)
+ ;
num_keys = length(constr->keys);
- keys_matched = 0;
if (i == num_keys)
{
/* Loop over each key in the constraint and check that there is a
corresponding key in the index. */
+ int keys_matched = 0;
+
i = 0;
foreach(keyl, constr->keys)
{
Ident *key = lfirst(keyl);
+ int keyno = indexStruct->indkey[i];
/* Look at key[i] in the index and check that it is over the same column
as key[i] in the constraint. This is to differentiate between (a,b)
and (b,a) */
- if (i < INDEX_MAX_KEYS && indexStruct->indkey[i] != 0)
- {
- int keyno = indexStruct->indkey[i];
-
- if (keyno > 0)
- {
- char *name = NameStr(rel_attrs[keyno - 1]->attname);
- if (strcmp(name, key->name) == 0) keys_matched++;
- }
- }
- else elog(ERROR, "ALTER TABLE/ADD CONSTRAINT: Key \"%u[%u]\" not found", indexoid, i);
+ if (namestrcmp(attnumAttName(rel, keyno),
+ key->name) == 0)
+ keys_matched++;
+ else
+ break;
i++;
}
if (keys_matched == num_keys) {
index_found = true;
index_found_unique = indexStruct->indisunique;
index_found_primary = indexStruct->indisprimary;
- if (index_found_unique || index_found_primary) break;
}
}
ReleaseSysCache(indexTuple);
+ if (index_found_unique || index_found_primary)
+ break;
}
freeList(indexoidlist);
Trigger trig;
List *list;
int count;
- List *indexoidlist,
- *indexoidscan;
- Form_pg_attribute *rel_attrs = NULL;
- int i;
- bool found = false;
-
- Oid fktypoid[INDEX_MAX_KEYS];
- Oid pktypoid[INDEX_MAX_KEYS];
- int attloc;
- for (i=0; i<INDEX_MAX_KEYS; i++)
- fktypoid[i]=pktypoid[i]=0;
-
if (is_temp_rel_name(fkconstraint->pktable_name) &&
!is_temp_rel_name(relationName))
elog(ERROR, "ALTER TABLE / ADD CONSTRAINT: Unable to reference temporary table from permanent table constraint.");
if (pkrel->rd_rel->relkind != RELKIND_RELATION)
elog(ERROR, "referenced table \"%s\" not a relation",
fkconstraint->pktable_name);
+ heap_close(pkrel, NoLock);
/*
+ * First we check for limited correctness of the constraint.
+ *
+ * NOTE: we assume parser has already checked for existence
+ * of an appropriate unique index on the referenced relation,
+ * and that the column datatypes are comparable.
+ *
* Scan through each tuple, calling the RI_FKey_Match_Ins
* (insert trigger) as if that tuple had just been
* inserted. If any of those fail, it should elog(ERROR)
* and that's that.
*/
- /*
- * First we check for limited correctness of the
- * constraint
- */
-
- rel_attrs = pkrel->rd_att->attrs;
- indexoidlist = RelationGetIndexList(pkrel);
-
- foreach(indexoidscan, indexoidlist)
- {
- Oid indexoid = lfirsti(indexoidscan);
- HeapTuple indexTuple;
- Form_pg_index indexStruct;
-
- indexTuple = SearchSysCache(INDEXRELID,
- ObjectIdGetDatum(indexoid),
- 0, 0, 0);
- if (!HeapTupleIsValid(indexTuple))
- elog(ERROR, "transformFkeyGetPrimaryKey: index %u not found",
- indexoid);
- indexStruct = (Form_pg_index) GETSTRUCT(indexTuple);
-
- if (indexStruct->indisunique)
- {
- List *attrl;
-
- /*
- * Make sure this index has the same number of
- * keys -- It obviously won't match otherwise.
- */
- for (i = 0; i < INDEX_MAX_KEYS && indexStruct->indkey[i] != 0; i++);
- if (i != length(fkconstraint->pk_attrs))
- found = false;
- else
- {
- attloc=0;
- /* go through the fkconstraint->pk_attrs list */
- foreach(attrl, fkconstraint->pk_attrs)
- {
- Ident *attr = lfirst(attrl);
-
- found = false;
- for (i = 0; i < INDEX_MAX_KEYS && indexStruct->indkey[i] != 0; i++)
- {
- int pkattno = indexStruct->indkey[i];
-
- if (pkattno > 0)
- {
- char *name = NameStr(rel_attrs[pkattno - 1]->attname);
-
- if (strcmp(name, attr->name) == 0)
- {
- /* We get the type of this attribute here and
- * store it so we can use it later for making
- * sure the types are comparable.
- */
- pktypoid[attloc++]=rel_attrs[pkattno-1]->atttypid;
- found = true;
- break;
- }
- }
- }
- if (!found)
- break;
- }
- }
- }
- ReleaseSysCache(indexTuple);
- if (found)
- break;
- }
-
- if (!found)
- elog(ERROR, "UNIQUE constraint matching given keys for referenced table \"%s\" not found",
- fkconstraint->pktable_name);
-
- freeList(indexoidlist);
- heap_close(pkrel, NoLock);
-
- rel_attrs = rel->rd_att->attrs;
- if (fkconstraint->fk_attrs != NIL)
- {
- List *fkattrs;
- Ident *fkattr;
-
- found = false;
- attloc = 0;
- foreach(fkattrs, fkconstraint->fk_attrs)
- {
- int count;
-
- found = false;
- fkattr = lfirst(fkattrs);
- for (count = 0; count < rel->rd_att->natts; count++)
- {
- char *name = NameStr(rel->rd_att->attrs[count]->attname);
-
- if (strcmp(name, fkattr->name) == 0)
- {
- /*
- * Here once again we get the types, this
- * time for the fk table's attributes
- */
- fktypoid[attloc++]=rel->rd_att->attrs[count]->atttypid;
- found = true;
- break;
- }
- }
- if (!found)
- break;
- }
- if (!found)
- elog(ERROR, "columns referenced in foreign key constraint not found.");
- }
-
- for (i=0; i < INDEX_MAX_KEYS && fktypoid[i] !=0; i++) {
- /*
- * fktypoid[i] is the foreign key table's i'th element's type oid
- * pktypoid[i] is the primary key table's i'th element's type oid
- * We let oper() do our work for us, including elog(ERROR) if the
- * types can't compare with =
- */
- Operator o=oper("=", fktypoid[i], pktypoid[i], false);
- ReleaseSysCache(o);
- }
-
trig.tgoid = 0;
if (fkconstraint->constr_name)
trig.tgname = fkconstraint->constr_name;
trig.tgnargs = count - 1;
scan = heap_beginscan(rel, false, SnapshotNow, 0, NULL);
- AssertState(scan != NULL);
while (HeapTupleIsValid(tuple = heap_getnext(scan, 0)))
{
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $Header: /cvsroot/pgsql/src/backend/parser/analyze.c,v 1.202 2001/10/22 22:49:02 tgl Exp $
+ * $Header: /cvsroot/pgsql/src/backend/parser/analyze.c,v 1.203 2001/10/23 17:39:02 tgl Exp $
*
*-------------------------------------------------------------------------
*/
/*
* transformUpdateStmt -
* transforms an update statement
- *
*/
static Query *
transformUpdateStmt(ParseState *pstate, UpdateStmt *stmt)
transformFkeyCheckAttrs(FkConstraint *fkconstraint, Oid *pktypoid)
{
Relation pkrel;
- Form_pg_attribute *pkrel_attrs;
List *indexoidlist,
*indexoidscan;
int i;
bool found = false;
/*
- * Open the referenced table and get the attributes list
+ * Open the referenced table
*/
pkrel = heap_openr(fkconstraint->pktable_name, AccessShareLock);
- pkrel_attrs = pkrel->rd_att->attrs;
/*
* Get the list of index OIDs for the table from the relcache, and
HeapTuple indexTuple;
Form_pg_index indexStruct;
+ found = false;
indexTuple = SearchSysCache(INDEXRELID,
ObjectIdGetDatum(indexoid),
0, 0, 0);
if (indexStruct->indisunique)
{
- List *attrl;
- int attnum=0;
-
for (i = 0; i < INDEX_MAX_KEYS && indexStruct->indkey[i] != 0; i++)
;
- if (i != length(fkconstraint->pk_attrs))
- found = false;
- else
+ if (i == length(fkconstraint->pk_attrs))
{
/* go through the fkconstraint->pk_attrs list */
+ List *attrl;
+ int attnum = 0;
+
foreach(attrl, fkconstraint->pk_attrs)
{
Ident *attr = lfirst(attrl);
{
int pkattno = indexStruct->indkey[i];
- if (pkattno > 0)
+ if (namestrcmp(attnumAttName(pkrel, pkattno),
+ attr->name) == 0)
{
- char *name = NameStr(pkrel_attrs[pkattno - 1]->attname);
-
- if (strcmp(name, attr->name) == 0)
- {
- pktypoid[attnum++]=pkrel_attrs[pkattno-1]->atttypid;
- found = true;
- break;
- }
+ pktypoid[attnum++] = attnumTypeId(pkrel, pkattno);
+ found = true;
+ break;
}
}
if (!found)
transformFkeyGetPrimaryKey(FkConstraint *fkconstraint, Oid *pktypoid)
{
Relation pkrel;
- Form_pg_attribute *pkrel_attrs;
List *indexoidlist,
*indexoidscan;
HeapTuple indexTuple = NULL;
int attnum=0;
/*
- * Open the referenced table and get the attributes list
+ * Open the referenced table
*/
pkrel = heap_openr(fkconstraint->pktable_name, AccessShareLock);
- pkrel_attrs = pkrel->rd_att->attrs;
/*
* Get the list of index OIDs for the table from the relcache, and
int pkattno = indexStruct->indkey[i];
Ident *pkattr = makeNode(Ident);
- pkattr->name = pstrdup(NameStr(pkrel_attrs[pkattno-1]->attname));
+ pkattr->name = pstrdup(NameStr(*attnumAttName(pkrel, pkattno)));
pkattr->indirection = NIL;
pkattr->isRel = false;
- pktypoid[attnum++] = pkrel_attrs[pkattno-1]->atttypid;
+ pktypoid[attnum++] = attnumTypeId(pkrel, pkattno);
fkconstraint->pk_attrs = lappend(fkconstraint->pk_attrs, pkattr);
}
List *cols;
List *inher;
Oid result;
+ Form_pg_attribute sysatt;
/* First look for column among the newly-created columns */
foreach(cols, cxt->columns)
return result;
}
}
+ /* Perhaps it's a system column name */
+ sysatt = SystemAttributeByName(colname, cxt->hasoids);
+ if (sysatt)
+ return sysatt->atttypid;
/* Look for column among inherited columns (if CREATE TABLE case) */
foreach(inher, cxt->inhRelnames)
{
*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/parser/parse_relation.c,v 1.57 2001/10/22 22:47:57 tgl Exp $
+ * $Header: /cvsroot/pgsql/src/backend/parser/parse_relation.c,v 1.58 2001/10/23 17:39:02 tgl Exp $
*
*-------------------------------------------------------------------------
*/
int i;
for (i = 0; i < rd->rd_rel->relnatts; i++)
- if (!namestrcmp(&(rd->rd_att->attrs[i]->attname), a))
+ if (namestrcmp(&(rd->rd_att->attrs[i]->attname), a) == 0)
return i + 1;
if ((i = specialAttNum(a)) != InvalidAttrNumber)
}
+/*
+ * given attribute id, return name of that attribute
+ *
+ * This should only be used if the relation is already
+ * heap_open()'ed. Use the cache version get_atttype()
+ * for access to non-opened relations.
+ */
+Name
+attnumAttName(Relation rd, int attid)
+{
+ if (attid <= 0)
+ {
+ Form_pg_attribute sysatt;
+
+ sysatt = SystemAttributeDefinition(attid, rd->rd_rel->relhasoids);
+ return &sysatt->attname;
+ }
+ if (attid > rd->rd_att->natts)
+ elog(ERROR, "attnumAttName: invalid attribute number %d", attid);
+ return &rd->rd_att->attrs[attid - 1]->attname;
+}
+
/*
* given attribute id, return type of that attribute
*
sysatt = SystemAttributeDefinition(attid, rd->rd_rel->relhasoids);
return sysatt->atttypid;
}
-
- /*
- * -1 because attid is 1-based
- */
+ if (attid > rd->rd_att->natts)
+ elog(ERROR, "attnumTypeId: invalid attribute number %d", attid);
return rd->rd_att->attrs[attid - 1]->atttypid;
}
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