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heap.c
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heap.c
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/*-------------------------------------------------------------------------
*
* heap.c
* code to create and destroy POSTGRES heap relations
*
* Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* src/backend/catalog/heap.c
*
*
* INTERFACE ROUTINES
* heap_create() - Create an uncataloged heap relation
* heap_create_with_catalog() - Create a cataloged relation
* heap_drop_with_catalog() - Removes named relation from catalogs
*
* NOTES
* this code taken from access/heap/create.c, which contains
* the old heap_create_with_catalog, amcreate, and amdestroy.
* those routines will soon call these routines using the function
* manager,
* just like the poorly named "NewXXX" routines do. The
* "New" routines are all going to die soon, once and for all!
* -cim 1/13/91
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "access/genam.h"
#include "access/htup_details.h"
#include "access/multixact.h"
#include "access/relation.h"
#include "access/sysattr.h"
#include "access/table.h"
#include "access/tableam.h"
#include "access/toast_compression.h"
#include "access/transam.h"
#include "access/xact.h"
#include "access/xlog.h"
#include "catalog/binary_upgrade.h"
#include "catalog/catalog.h"
#include "catalog/dependency.h"
#include "catalog/heap.h"
#include "catalog/index.h"
#include "catalog/objectaccess.h"
#include "catalog/partition.h"
#include "catalog/pg_am.h"
#include "catalog/pg_attrdef.h"
#include "catalog/pg_collation.h"
#include "catalog/pg_constraint.h"
#include "catalog/pg_foreign_table.h"
#include "catalog/pg_inherits.h"
#include "catalog/pg_namespace.h"
#include "catalog/pg_opclass.h"
#include "catalog/pg_partitioned_table.h"
#include "catalog/pg_statistic.h"
#include "catalog/pg_subscription_rel.h"
#include "catalog/pg_tablespace.h"
#include "catalog/pg_type.h"
#include "catalog/storage.h"
#include "catalog/storage_xlog.h"
#include "commands/tablecmds.h"
#include "commands/typecmds.h"
#include "executor/executor.h"
#include "miscadmin.h"
#include "nodes/nodeFuncs.h"
#include "optimizer/optimizer.h"
#include "parser/parse_coerce.h"
#include "parser/parse_collate.h"
#include "parser/parse_expr.h"
#include "parser/parse_relation.h"
#include "parser/parsetree.h"
#include "partitioning/partdesc.h"
#include "storage/lmgr.h"
#include "storage/predicate.h"
#include "storage/smgr.h"
#include "utils/acl.h"
#include "utils/builtins.h"
#include "utils/datum.h"
#include "utils/fmgroids.h"
#include "utils/inval.h"
#include "utils/lsyscache.h"
#include "utils/partcache.h"
#include "utils/ruleutils.h"
#include "utils/snapmgr.h"
#include "utils/syscache.h"
/* Potentially set by pg_upgrade_support functions */
Oid binary_upgrade_next_heap_pg_class_oid = InvalidOid;
Oid binary_upgrade_next_toast_pg_class_oid = InvalidOid;
static void AddNewRelationTuple(Relation pg_class_desc,
Relation new_rel_desc,
Oid new_rel_oid,
Oid new_type_oid,
Oid reloftype,
Oid relowner,
char relkind,
TransactionId relfrozenxid,
TransactionId relminmxid,
Datum relacl,
Datum reloptions);
static ObjectAddress AddNewRelationType(const char *typeName,
Oid typeNamespace,
Oid new_rel_oid,
char new_rel_kind,
Oid ownerid,
Oid new_row_type,
Oid new_array_type);
static void RelationRemoveInheritance(Oid relid);
static Oid StoreRelCheck(Relation rel, const char *ccname, Node *expr,
bool is_validated, bool is_local, int inhcount,
bool is_no_inherit, bool is_internal);
static void StoreConstraints(Relation rel, List *cooked_constraints,
bool is_internal);
static bool MergeWithExistingConstraint(Relation rel, const char *ccname, Node *expr,
bool allow_merge, bool is_local,
bool is_initially_valid,
bool is_no_inherit);
static void SetRelationNumChecks(Relation rel, int numchecks);
static Node *cookConstraint(ParseState *pstate,
Node *raw_constraint,
char *relname);
/* ----------------------------------------------------------------
* XXX UGLY HARD CODED BADNESS FOLLOWS XXX
*
* these should all be moved to someplace in the lib/catalog
* module, if not obliterated first.
* ----------------------------------------------------------------
*/
/*
* Note:
* Should the system special case these attributes in the future?
* Advantage: consume much less space in the ATTRIBUTE relation.
* Disadvantage: special cases will be all over the place.
*/
/*
* The initializers below do not include trailing variable length fields,
* but that's OK - we're never going to reference anything beyond the
* fixed-size portion of the structure anyway. Fields that can default
* to zeroes are also not mentioned.
*/
static const FormData_pg_attribute a1 = {
.attname = {"ctid"},
.atttypid = TIDOID,
.attlen = sizeof(ItemPointerData),
.attnum = SelfItemPointerAttributeNumber,
.attcacheoff = -1,
.atttypmod = -1,
.attbyval = false,
.attalign = TYPALIGN_SHORT,
.attstorage = TYPSTORAGE_PLAIN,
.attnotnull = true,
.attislocal = true,
};
static const FormData_pg_attribute a2 = {
.attname = {"xmin"},
.atttypid = XIDOID,
.attlen = sizeof(TransactionId),
.attnum = MinTransactionIdAttributeNumber,
.attcacheoff = -1,
.atttypmod = -1,
.attbyval = true,
.attalign = TYPALIGN_INT,
.attstorage = TYPSTORAGE_PLAIN,
.attnotnull = true,
.attislocal = true,
};
static const FormData_pg_attribute a3 = {
.attname = {"cmin"},
.atttypid = CIDOID,
.attlen = sizeof(CommandId),
.attnum = MinCommandIdAttributeNumber,
.attcacheoff = -1,
.atttypmod = -1,
.attbyval = true,
.attalign = TYPALIGN_INT,
.attstorage = TYPSTORAGE_PLAIN,
.attnotnull = true,
.attislocal = true,
};
static const FormData_pg_attribute a4 = {
.attname = {"xmax"},
.atttypid = XIDOID,
.attlen = sizeof(TransactionId),
.attnum = MaxTransactionIdAttributeNumber,
.attcacheoff = -1,
.atttypmod = -1,
.attbyval = true,
.attalign = TYPALIGN_INT,
.attstorage = TYPSTORAGE_PLAIN,
.attnotnull = true,
.attislocal = true,
};
static const FormData_pg_attribute a5 = {
.attname = {"cmax"},
.atttypid = CIDOID,
.attlen = sizeof(CommandId),
.attnum = MaxCommandIdAttributeNumber,
.attcacheoff = -1,
.atttypmod = -1,
.attbyval = true,
.attalign = TYPALIGN_INT,
.attstorage = TYPSTORAGE_PLAIN,
.attnotnull = true,
.attislocal = true,
};
/*
* We decided to call this attribute "tableoid" rather than say
* "classoid" on the basis that in the future there may be more than one
* table of a particular class/type. In any case table is still the word
* used in SQL.
*/
static const FormData_pg_attribute a6 = {
.attname = {"tableoid"},
.atttypid = OIDOID,
.attlen = sizeof(Oid),
.attnum = TableOidAttributeNumber,
.attcacheoff = -1,
.atttypmod = -1,
.attbyval = true,
.attalign = TYPALIGN_INT,
.attstorage = TYPSTORAGE_PLAIN,
.attnotnull = true,
.attislocal = true,
};
static const FormData_pg_attribute *SysAtt[] = {&a1, &a2, &a3, &a4, &a5, &a6};
/*
* This function returns a Form_pg_attribute pointer for a system attribute.
* Note that we elog if the presented attno is invalid, which would only
* happen if there's a problem upstream.
*/
const FormData_pg_attribute *
SystemAttributeDefinition(AttrNumber attno)
{
if (attno >= 0 || attno < -(int) lengthof(SysAtt))
elog(ERROR, "invalid system attribute number %d", attno);
return SysAtt[-attno - 1];
}
/*
* If the given name is a system attribute name, return a Form_pg_attribute
* pointer for a prototype definition. If not, return NULL.
*/
const FormData_pg_attribute *
SystemAttributeByName(const char *attname)
{
int j;
for (j = 0; j < (int) lengthof(SysAtt); j++)
{
const FormData_pg_attribute *att = SysAtt[j];
if (strcmp(NameStr(att->attname), attname) == 0)
return att;
}
return NULL;
}
/* ----------------------------------------------------------------
* XXX END OF UGLY HARD CODED BADNESS XXX
* ---------------------------------------------------------------- */
/* ----------------------------------------------------------------
* heap_create - Create an uncataloged heap relation
*
* Note API change: the caller must now always provide the OID
* to use for the relation. The relfilenode may (and, normally,
* should) be left unspecified.
*
* rel->rd_rel is initialized by RelationBuildLocalRelation,
* and is mostly zeroes at return.
* ----------------------------------------------------------------
*/
Relation
heap_create(const char *relname,
Oid relnamespace,
Oid reltablespace,
Oid relid,
Oid relfilenode,
Oid accessmtd,
TupleDesc tupDesc,
char relkind,
char relpersistence,
bool shared_relation,
bool mapped_relation,
bool allow_system_table_mods,
TransactionId *relfrozenxid,
MultiXactId *relminmxid)
{
bool create_storage;
Relation rel;
/* The caller must have provided an OID for the relation. */
Assert(OidIsValid(relid));
/*
* Don't allow creating relations in pg_catalog directly, even though it
* is allowed to move user defined relations there. Semantics with search
* paths including pg_catalog are too confusing for now.
*
* But allow creating indexes on relations in pg_catalog even if
* allow_system_table_mods = off, upper layers already guarantee it's on a
* user defined relation, not a system one.
*/
if (!allow_system_table_mods &&
((IsCatalogNamespace(relnamespace) && relkind != RELKIND_INDEX) ||
IsToastNamespace(relnamespace)) &&
IsNormalProcessingMode())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("permission denied to create \"%s.%s\"",
get_namespace_name(relnamespace), relname),
errdetail("System catalog modifications are currently disallowed.")));
*relfrozenxid = InvalidTransactionId;
*relminmxid = InvalidMultiXactId;
/* Handle reltablespace for specific relkinds. */
switch (relkind)
{
case RELKIND_VIEW:
case RELKIND_COMPOSITE_TYPE:
case RELKIND_FOREIGN_TABLE:
/*
* Force reltablespace to zero if the relation has no physical
* storage. This is mainly just for cleanliness' sake.
*
* Partitioned tables and indexes don't have physical storage
* either, but we want to keep their tablespace settings so that
* their children can inherit it.
*/
reltablespace = InvalidOid;
break;
case RELKIND_SEQUENCE:
/*
* Force reltablespace to zero for sequences, since we don't
* support moving them around into different tablespaces.
*/
reltablespace = InvalidOid;
break;
default:
break;
}
/*
* Decide whether to create storage. If caller passed a valid relfilenode,
* storage is already created, so don't do it here. Also don't create it
* for relkinds without physical storage.
*/
if (!RELKIND_HAS_STORAGE(relkind) || OidIsValid(relfilenode))
create_storage = false;
else
{
create_storage = true;
relfilenode = relid;
}
/*
* Never allow a pg_class entry to explicitly specify the database's
* default tablespace in reltablespace; force it to zero instead. This
* ensures that if the database is cloned with a different default
* tablespace, the pg_class entry will still match where CREATE DATABASE
* will put the physically copied relation.
*
* Yes, this is a bit of a hack.
*/
if (reltablespace == MyDatabaseTableSpace)
reltablespace = InvalidOid;
/*
* build the relcache entry.
*/
rel = RelationBuildLocalRelation(relname,
relnamespace,
tupDesc,
relid,
accessmtd,
relfilenode,
reltablespace,
shared_relation,
mapped_relation,
relpersistence,
relkind);
/*
* Have the storage manager create the relation's disk file, if needed.
*
* For relations the callback creates both the main and the init fork, for
* indexes only the main fork is created. The other forks will be created
* on demand.
*/
if (create_storage)
{
RelationOpenSmgr(rel);
switch (rel->rd_rel->relkind)
{
case RELKIND_VIEW:
case RELKIND_COMPOSITE_TYPE:
case RELKIND_FOREIGN_TABLE:
case RELKIND_PARTITIONED_TABLE:
case RELKIND_PARTITIONED_INDEX:
Assert(false);
break;
case RELKIND_INDEX:
case RELKIND_SEQUENCE:
RelationCreateStorage(rel->rd_node, relpersistence);
break;
case RELKIND_RELATION:
case RELKIND_TOASTVALUE:
case RELKIND_MATVIEW:
table_relation_set_new_filenode(rel, &rel->rd_node,
relpersistence,
relfrozenxid, relminmxid);
break;
}
}
/*
* If a tablespace is specified, removal of that tablespace is normally
* protected by the existence of a physical file; but for relations with
* no files, add a pg_shdepend entry to account for that.
*/
if (!create_storage && reltablespace != InvalidOid)
recordDependencyOnTablespace(RelationRelationId, relid,
reltablespace);
return rel;
}
/* ----------------------------------------------------------------
* heap_create_with_catalog - Create a cataloged relation
*
* this is done in multiple steps:
*
* 1) CheckAttributeNamesTypes() is used to make certain the tuple
* descriptor contains a valid set of attribute names and types
*
* 2) pg_class is opened and get_relname_relid()
* performs a scan to ensure that no relation with the
* same name already exists.
*
* 3) heap_create() is called to create the new relation on disk.
*
* 4) TypeCreate() is called to define a new type corresponding
* to the new relation.
*
* 5) AddNewRelationTuple() is called to register the
* relation in pg_class.
*
* 6) AddNewAttributeTuples() is called to register the
* new relation's schema in pg_attribute.
*
* 7) StoreConstraints is called () - vadim 08/22/97
*
* 8) the relations are closed and the new relation's oid
* is returned.
*
* ----------------------------------------------------------------
*/
/* --------------------------------
* CheckAttributeNamesTypes
*
* this is used to make certain the tuple descriptor contains a
* valid set of attribute names and datatypes. a problem simply
* generates ereport(ERROR) which aborts the current transaction.
*
* relkind is the relkind of the relation to be created.
* flags controls which datatypes are allowed, cf CheckAttributeType.
* --------------------------------
*/
void
CheckAttributeNamesTypes(TupleDesc tupdesc, char relkind,
int flags)
{
int i;
int j;
int natts = tupdesc->natts;
/* Sanity check on column count */
if (natts < 0 || natts > MaxHeapAttributeNumber)
ereport(ERROR,
(errcode(ERRCODE_TOO_MANY_COLUMNS),
errmsg("tables can have at most %d columns",
MaxHeapAttributeNumber)));
/*
* first check for collision with system attribute names
*
* Skip this for a view or type relation, since those don't have system
* attributes.
*/
if (relkind != RELKIND_VIEW && relkind != RELKIND_COMPOSITE_TYPE)
{
for (i = 0; i < natts; i++)
{
Form_pg_attribute attr = TupleDescAttr(tupdesc, i);
if (SystemAttributeByName(NameStr(attr->attname)) != NULL)
ereport(ERROR,
(errcode(ERRCODE_DUPLICATE_COLUMN),
errmsg("column name \"%s\" conflicts with a system column name",
NameStr(attr->attname))));
}
}
/*
* next check for repeated attribute names
*/
for (i = 1; i < natts; i++)
{
for (j = 0; j < i; j++)
{
if (strcmp(NameStr(TupleDescAttr(tupdesc, j)->attname),
NameStr(TupleDescAttr(tupdesc, i)->attname)) == 0)
ereport(ERROR,
(errcode(ERRCODE_DUPLICATE_COLUMN),
errmsg("column name \"%s\" specified more than once",
NameStr(TupleDescAttr(tupdesc, j)->attname))));
}
}
/*
* next check the attribute types
*/
for (i = 0; i < natts; i++)
{
CheckAttributeType(NameStr(TupleDescAttr(tupdesc, i)->attname),
TupleDescAttr(tupdesc, i)->atttypid,
TupleDescAttr(tupdesc, i)->attcollation,
NIL, /* assume we're creating a new rowtype */
flags);
}
}
/* --------------------------------
* CheckAttributeType
*
* Verify that the proposed datatype of an attribute is legal.
* This is needed mainly because there are types (and pseudo-types)
* in the catalogs that we do not support as elements of real tuples.
* We also check some other properties required of a table column.
*
* If the attribute is being proposed for addition to an existing table or
* composite type, pass a one-element list of the rowtype OID as
* containing_rowtypes. When checking a to-be-created rowtype, it's
* sufficient to pass NIL, because there could not be any recursive reference
* to a not-yet-existing rowtype.
*
* flags is a bitmask controlling which datatypes we allow. For the most
* part, pseudo-types are disallowed as attribute types, but there are some
* exceptions: ANYARRAYOID, RECORDOID, and RECORDARRAYOID can be allowed
* in some cases. (This works because values of those type classes are
* self-identifying to some extent. However, RECORDOID and RECORDARRAYOID
* are reliably identifiable only within a session, since the identity info
* may use a typmod that is only locally assigned. The caller is expected
* to know whether these cases are safe.)
*
* flags can also control the phrasing of the error messages. If
* CHKATYPE_IS_PARTKEY is specified, "attname" should be a partition key
* column number as text, not a real column name.
* --------------------------------
*/
void
CheckAttributeType(const char *attname,
Oid atttypid, Oid attcollation,
List *containing_rowtypes,
int flags)
{
char att_typtype = get_typtype(atttypid);
Oid att_typelem;
if (att_typtype == TYPTYPE_PSEUDO)
{
/*
* We disallow pseudo-type columns, with the exception of ANYARRAY,
* RECORD, and RECORD[] when the caller says that those are OK.
*
* We don't need to worry about recursive containment for RECORD and
* RECORD[] because (a) no named composite type should be allowed to
* contain those, and (b) two "anonymous" record types couldn't be
* considered to be the same type, so infinite recursion isn't
* possible.
*/
if (!((atttypid == ANYARRAYOID && (flags & CHKATYPE_ANYARRAY)) ||
(atttypid == RECORDOID && (flags & CHKATYPE_ANYRECORD)) ||
(atttypid == RECORDARRAYOID && (flags & CHKATYPE_ANYRECORD))))
{
if (flags & CHKATYPE_IS_PARTKEY)
ereport(ERROR,
(errcode(ERRCODE_INVALID_TABLE_DEFINITION),
/* translator: first %s is an integer not a name */
errmsg("partition key column %s has pseudo-type %s",
attname, format_type_be(atttypid))));
else
ereport(ERROR,
(errcode(ERRCODE_INVALID_TABLE_DEFINITION),
errmsg("column \"%s\" has pseudo-type %s",
attname, format_type_be(atttypid))));
}
}
else if (att_typtype == TYPTYPE_DOMAIN)
{
/*
* If it's a domain, recurse to check its base type.
*/
CheckAttributeType(attname, getBaseType(atttypid), attcollation,
containing_rowtypes,
flags);
}
else if (att_typtype == TYPTYPE_COMPOSITE)
{
/*
* For a composite type, recurse into its attributes.
*/
Relation relation;
TupleDesc tupdesc;
int i;
/*
* Check for self-containment. Eventually we might be able to allow
* this (just return without complaint, if so) but it's not clear how
* many other places would require anti-recursion defenses before it
* would be safe to allow tables to contain their own rowtype.
*/
if (list_member_oid(containing_rowtypes, atttypid))
ereport(ERROR,
(errcode(ERRCODE_INVALID_TABLE_DEFINITION),
errmsg("composite type %s cannot be made a member of itself",
format_type_be(atttypid))));
containing_rowtypes = lappend_oid(containing_rowtypes, atttypid);
relation = relation_open(get_typ_typrelid(atttypid), AccessShareLock);
tupdesc = RelationGetDescr(relation);
for (i = 0; i < tupdesc->natts; i++)
{
Form_pg_attribute attr = TupleDescAttr(tupdesc, i);
if (attr->attisdropped)
continue;
CheckAttributeType(NameStr(attr->attname),
attr->atttypid, attr->attcollation,
containing_rowtypes,
flags & ~CHKATYPE_IS_PARTKEY);
}
relation_close(relation, AccessShareLock);
containing_rowtypes = list_delete_last(containing_rowtypes);
}
else if (att_typtype == TYPTYPE_RANGE)
{
/*
* If it's a range, recurse to check its subtype.
*/
CheckAttributeType(attname, get_range_subtype(atttypid),
get_range_collation(atttypid),
containing_rowtypes,
flags);
}
else if (OidIsValid((att_typelem = get_element_type(atttypid))))
{
/*
* Must recurse into array types, too, in case they are composite.
*/
CheckAttributeType(attname, att_typelem, attcollation,
containing_rowtypes,
flags);
}
/*
* This might not be strictly invalid per SQL standard, but it is pretty
* useless, and it cannot be dumped, so we must disallow it.
*/
if (!OidIsValid(attcollation) && type_is_collatable(atttypid))
{
if (flags & CHKATYPE_IS_PARTKEY)
ereport(ERROR,
(errcode(ERRCODE_INVALID_TABLE_DEFINITION),
/* translator: first %s is an integer not a name */
errmsg("no collation was derived for partition key column %s with collatable type %s",
attname, format_type_be(atttypid)),
errhint("Use the COLLATE clause to set the collation explicitly.")));
else
ereport(ERROR,
(errcode(ERRCODE_INVALID_TABLE_DEFINITION),
errmsg("no collation was derived for column \"%s\" with collatable type %s",
attname, format_type_be(atttypid)),
errhint("Use the COLLATE clause to set the collation explicitly.")));
}
}
/*
* InsertPgAttributeTuples
* Construct and insert a set of tuples in pg_attribute.
*
* Caller has already opened and locked pg_attribute. tupdesc contains the
* attributes to insert. attcacheoff is always initialized to -1, attacl,
* attfdwoptions and attmissingval are always initialized to NULL. attoptions
* must contain the same number of elements as tupdesc, or be NULL.
*
* indstate is the index state for CatalogTupleInsertWithInfo. It can be
* passed as NULL, in which case we'll fetch the necessary info. (Don't do
* this when inserting multiple attributes, because it's a tad more
* expensive.)
*
* new_rel_oid is the relation OID assigned to the attributes inserted.
* If set to InvalidOid, the relation OID from tupdesc is used instead.
*/
void
InsertPgAttributeTuples(Relation pg_attribute_rel,
TupleDesc tupdesc,
Oid new_rel_oid,
Datum *attoptions,
CatalogIndexState indstate)
{
TupleTableSlot **slot;
TupleDesc td;
int nslots;
int natts = 0;
int slotCount = 0;
bool close_index = false;
td = RelationGetDescr(pg_attribute_rel);
/* Initialize the number of slots to use */
nslots = Min(tupdesc->natts,
(MAX_CATALOG_MULTI_INSERT_BYTES / sizeof(FormData_pg_attribute)));
slot = palloc(sizeof(TupleTableSlot *) * nslots);
for (int i = 0; i < nslots; i++)
slot[i] = MakeSingleTupleTableSlot(td, &TTSOpsHeapTuple);
while (natts < tupdesc->natts)
{
Form_pg_attribute attrs = TupleDescAttr(tupdesc, natts);
ExecClearTuple(slot[slotCount]);
if (new_rel_oid != InvalidOid)
slot[slotCount]->tts_values[Anum_pg_attribute_attrelid - 1] = ObjectIdGetDatum(new_rel_oid);
else
slot[slotCount]->tts_values[Anum_pg_attribute_attrelid - 1] = ObjectIdGetDatum(attrs->attrelid);
slot[slotCount]->tts_values[Anum_pg_attribute_attname - 1] = NameGetDatum(&attrs->attname);
slot[slotCount]->tts_values[Anum_pg_attribute_atttypid - 1] = ObjectIdGetDatum(attrs->atttypid);
slot[slotCount]->tts_values[Anum_pg_attribute_attstattarget - 1] = Int32GetDatum(attrs->attstattarget);
slot[slotCount]->tts_values[Anum_pg_attribute_attlen - 1] = Int16GetDatum(attrs->attlen);
slot[slotCount]->tts_values[Anum_pg_attribute_attnum - 1] = Int16GetDatum(attrs->attnum);
slot[slotCount]->tts_values[Anum_pg_attribute_attndims - 1] = Int32GetDatum(attrs->attndims);
slot[slotCount]->tts_values[Anum_pg_attribute_attcacheoff - 1] = Int32GetDatum(-1);
slot[slotCount]->tts_values[Anum_pg_attribute_atttypmod - 1] = Int32GetDatum(attrs->atttypmod);
slot[slotCount]->tts_values[Anum_pg_attribute_attbyval - 1] = BoolGetDatum(attrs->attbyval);
slot[slotCount]->tts_values[Anum_pg_attribute_attalign - 1] = CharGetDatum(attrs->attalign);
slot[slotCount]->tts_values[Anum_pg_attribute_attstorage - 1] = CharGetDatum(attrs->attstorage);
slot[slotCount]->tts_values[Anum_pg_attribute_attcompression - 1] = CharGetDatum(attrs->attcompression);
slot[slotCount]->tts_values[Anum_pg_attribute_attnotnull - 1] = BoolGetDatum(attrs->attnotnull);
slot[slotCount]->tts_values[Anum_pg_attribute_atthasdef - 1] = BoolGetDatum(attrs->atthasdef);
slot[slotCount]->tts_values[Anum_pg_attribute_atthasmissing - 1] = BoolGetDatum(attrs->atthasmissing);
slot[slotCount]->tts_values[Anum_pg_attribute_attidentity - 1] = CharGetDatum(attrs->attidentity);
slot[slotCount]->tts_values[Anum_pg_attribute_attgenerated - 1] = CharGetDatum(attrs->attgenerated);
slot[slotCount]->tts_values[Anum_pg_attribute_attisdropped - 1] = BoolGetDatum(attrs->attisdropped);
slot[slotCount]->tts_values[Anum_pg_attribute_attislocal - 1] = BoolGetDatum(attrs->attislocal);
slot[slotCount]->tts_values[Anum_pg_attribute_attinhcount - 1] = Int32GetDatum(attrs->attinhcount);
slot[slotCount]->tts_values[Anum_pg_attribute_attcollation - 1] = ObjectIdGetDatum(attrs->attcollation);
if (attoptions && attoptions[natts] != (Datum) 0)
slot[slotCount]->tts_values[Anum_pg_attribute_attoptions - 1] = attoptions[natts];
else
slot[slotCount]->tts_isnull[Anum_pg_attribute_attoptions - 1] = true;
/* start out with empty permissions and empty options */
slot[slotCount]->tts_isnull[Anum_pg_attribute_attacl - 1] = true;
slot[slotCount]->tts_isnull[Anum_pg_attribute_attfdwoptions - 1] = true;
slot[slotCount]->tts_isnull[Anum_pg_attribute_attmissingval - 1] = true;
ExecStoreVirtualTuple(slot[slotCount]);
slotCount++;
/*
* If slots are full or the end of processing has been reached, insert
* a batch of tuples.
*/
if (slotCount == nslots || natts == tupdesc->natts - 1)
{
/* fetch index info only when we know we need it */
if (!indstate)
{
indstate = CatalogOpenIndexes(pg_attribute_rel);
close_index = true;
}
/* insert the new tuples and update the indexes */
CatalogTuplesMultiInsertWithInfo(pg_attribute_rel, slot, slotCount,
indstate);
slotCount = 0;
}
natts++;
}
if (close_index)
CatalogCloseIndexes(indstate);
for (int i = 0; i < nslots; i++)
ExecDropSingleTupleTableSlot(slot[i]);
pfree(slot);
}
/* --------------------------------
* AddNewAttributeTuples
*
* this registers the new relation's schema by adding
* tuples to pg_attribute.
* --------------------------------
*/
static void
AddNewAttributeTuples(Oid new_rel_oid,
TupleDesc tupdesc,
char relkind)
{
Relation rel;
CatalogIndexState indstate;
int natts = tupdesc->natts;
ObjectAddress myself,
referenced;
/*
* open pg_attribute and its indexes.
*/
rel = table_open(AttributeRelationId, RowExclusiveLock);
indstate = CatalogOpenIndexes(rel);
/* set stats detail level to a sane default */
for (int i = 0; i < natts; i++)
tupdesc->attrs[i].attstattarget = -1;
InsertPgAttributeTuples(rel, tupdesc, new_rel_oid, NULL, indstate);
/* add dependencies on their datatypes and collations */
for (int i = 0; i < natts; i++)
{
/* Add dependency info */
ObjectAddressSubSet(myself, RelationRelationId, new_rel_oid, i + 1);
ObjectAddressSet(referenced, TypeRelationId,
tupdesc->attrs[i].atttypid);
recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
/* The default collation is pinned, so don't bother recording it */
if (OidIsValid(tupdesc->attrs[i].attcollation) &&
tupdesc->attrs[i].attcollation != DEFAULT_COLLATION_OID)
{
ObjectAddressSet(referenced, CollationRelationId,
tupdesc->attrs[i].attcollation);
recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
}
}
/*
* Next we add the system attributes. Skip OID if rel has no OIDs. Skip
* all for a view or type relation. We don't bother with making datatype
* dependencies here, since presumably all these types are pinned.
*/
if (relkind != RELKIND_VIEW && relkind != RELKIND_COMPOSITE_TYPE)
{
TupleDesc td;
td = CreateTupleDesc(lengthof(SysAtt), (FormData_pg_attribute **) &SysAtt);
InsertPgAttributeTuples(rel, td, new_rel_oid, NULL, indstate);
FreeTupleDesc(td);
}
/*
* clean up
*/
CatalogCloseIndexes(indstate);
table_close(rel, RowExclusiveLock);
}
/* --------------------------------
* InsertPgClassTuple
*
* Construct and insert a new tuple in pg_class.
*
* Caller has already opened and locked pg_class.
* Tuple data is taken from new_rel_desc->rd_rel, except for the
* variable-width fields which are not present in a cached reldesc.
* relacl and reloptions are passed in Datum form (to avoid having
* to reference the data types in heap.h). Pass (Datum) 0 to set them
* to NULL.
* --------------------------------
*/
void
InsertPgClassTuple(Relation pg_class_desc,
Relation new_rel_desc,
Oid new_rel_oid,
Datum relacl,
Datum reloptions)
{
Form_pg_class rd_rel = new_rel_desc->rd_rel;
Datum values[Natts_pg_class];
bool nulls[Natts_pg_class];
HeapTuple tup;
/* This is a tad tedious, but way cleaner than what we used to do... */
memset(values, 0, sizeof(values));
memset(nulls, false, sizeof(nulls));
values[Anum_pg_class_oid - 1] = ObjectIdGetDatum(new_rel_oid);
values[Anum_pg_class_relname - 1] = NameGetDatum(&rd_rel->relname);
values[Anum_pg_class_relnamespace - 1] = ObjectIdGetDatum(rd_rel->relnamespace);
values[Anum_pg_class_reltype - 1] = ObjectIdGetDatum(rd_rel->reltype);
values[Anum_pg_class_reloftype - 1] = ObjectIdGetDatum(rd_rel->reloftype);
values[Anum_pg_class_relowner - 1] = ObjectIdGetDatum(rd_rel->relowner);
values[Anum_pg_class_relam - 1] = ObjectIdGetDatum(rd_rel->relam);
values[Anum_pg_class_relfilenode - 1] = ObjectIdGetDatum(rd_rel->relfilenode);
values[Anum_pg_class_reltablespace - 1] = ObjectIdGetDatum(rd_rel->reltablespace);
values[Anum_pg_class_relpages - 1] = Int32GetDatum(rd_rel->relpages);
values[Anum_pg_class_reltuples - 1] = Float4GetDatum(rd_rel->reltuples);
values[Anum_pg_class_relallvisible - 1] = Int32GetDatum(rd_rel->relallvisible);
values[Anum_pg_class_reltoastrelid - 1] = ObjectIdGetDatum(rd_rel->reltoastrelid);
values[Anum_pg_class_relhasindex - 1] = BoolGetDatum(rd_rel->relhasindex);
values[Anum_pg_class_relisshared - 1] = BoolGetDatum(rd_rel->relisshared);
values[Anum_pg_class_relpersistence - 1] = CharGetDatum(rd_rel->relpersistence);
values[Anum_pg_class_relkind - 1] = CharGetDatum(rd_rel->relkind);
values[Anum_pg_class_relnatts - 1] = Int16GetDatum(rd_rel->relnatts);
values[Anum_pg_class_relchecks - 1] = Int16GetDatum(rd_rel->relchecks);
values[Anum_pg_class_relhasrules - 1] = BoolGetDatum(rd_rel->relhasrules);
values[Anum_pg_class_relhastriggers - 1] = BoolGetDatum(rd_rel->relhastriggers);
values[Anum_pg_class_relrowsecurity - 1] = BoolGetDatum(rd_rel->relrowsecurity);
values[Anum_pg_class_relforcerowsecurity - 1] = BoolGetDatum(rd_rel->relforcerowsecurity);
values[Anum_pg_class_relhassubclass - 1] = BoolGetDatum(rd_rel->relhassubclass);
values[Anum_pg_class_relispopulated - 1] = BoolGetDatum(rd_rel->relispopulated);
values[Anum_pg_class_relreplident - 1] = CharGetDatum(rd_rel->relreplident);
values[Anum_pg_class_relispartition - 1] = BoolGetDatum(rd_rel->relispartition);
values[Anum_pg_class_relrewrite - 1] = ObjectIdGetDatum(rd_rel->relrewrite);
values[Anum_pg_class_relfrozenxid - 1] = TransactionIdGetDatum(rd_rel->relfrozenxid);
values[Anum_pg_class_relminmxid - 1] = MultiXactIdGetDatum(rd_rel->relminmxid);
if (relacl != (Datum) 0)
values[Anum_pg_class_relacl - 1] = relacl;
else
nulls[Anum_pg_class_relacl - 1] = true;
if (reloptions != (Datum) 0)
values[Anum_pg_class_reloptions - 1] = reloptions;
else
nulls[Anum_pg_class_reloptions - 1] = true;
/* relpartbound is set by updating this tuple, if necessary */
nulls[Anum_pg_class_relpartbound - 1] = true;
tup = heap_form_tuple(RelationGetDescr(pg_class_desc), values, nulls);
/* finally insert the new tuple, update the indexes, and clean up */
CatalogTupleInsert(pg_class_desc, tup);
heap_freetuple(tup);
}
/* --------------------------------
* AddNewRelationTuple
*
* this registers the new relation in the catalogs by
* adding a tuple to pg_class.
* --------------------------------
*/
static void
AddNewRelationTuple(Relation pg_class_desc,
Relation new_rel_desc,
Oid new_rel_oid,
Oid new_type_oid,
Oid reloftype,