database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-03 20:02:46 +03:00
Code Activity

Read info for DEFAULT from pg_attrdef.

Browse Source
This commit is contained in:
Vadim B. Mikheev
1997-08-21 01:36:09 +00:00
parent e3accffe66
commit 197ced5923
1 changed files with 154 additions and 41 deletions
Download Patch File Download Diff File Expand all files Collapse all files

193
src/backend/utils/cache/relcache.c vendored
View File

@ -7,7 +7,7 @@
* *
* *
* IDENTIFICATION * IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/cache/relcache.c,v 1.16 1997/08/20 14:54:07 momjian Exp $ * $Header: /cvsroot/pgsql/src/backend/utils/cache/relcache.c,v 1.17 1997/08/21 01:36:09 vadim Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -81,6 +81,7 @@
#include "catalog/pg_variable.h" #include "catalog/pg_variable.h"
#include "catalog/pg_log.h" #include "catalog/pg_log.h"
#include "catalog/pg_time.h" #include "catalog/pg_time.h"
#include "catalog/pg_attrdef.h"
#include "catalog/indexing.h" #include "catalog/indexing.h"
#include "catalog/index.h" #include "catalog/index.h"
#include "fmgr.h" #include "fmgr.h"
@ -90,22 +91,6 @@ static void RelationFlushRelation(Relation *relationPtr,
static Relation RelationNameCacheGetRelation(char *relationName); static Relation RelationNameCacheGetRelation(char *relationName);
static void init_irels(void); static void init_irels(void);
static void write_irels(void); static void write_irels(void);
/* non-export function prototypes */
static void formrdesc(char *relationName, u_int natts,
FormData_pg_attribute att[]);
static HeapTuple ScanPgRelation(RelationBuildDescInfo buildinfo);
static HeapTuple scan_pg_rel_seq(RelationBuildDescInfo buildinfo);
static HeapTuple scan_pg_rel_ind(RelationBuildDescInfo buildinfo);
static Relation AllocateRelationDesc(u_int natts, Form_pg_class relp);
static void RelationBuildTupleDesc(RelationBuildDescInfo buildinfo,
Relation relation, AttributeTupleForm attp, u_int natts);
static void build_tupdesc_seq(RelationBuildDescInfo buildinfo,
Relation relation, AttributeTupleForm attp, u_int natts);
static void build_tupdesc_ind(RelationBuildDescInfo buildinfo,
Relation relation, AttributeTupleForm attp, u_int natts);
static Relation RelationBuildDesc(RelationBuildDescInfo buildinfo);
static void IndexedAccessMethodInitialize(Relation relation);
/* ---------------- /* ----------------
* defines * defines
@ -254,6 +239,28 @@ typedef struct relnamecacheent {
} \ } \
} }
/* non-export function prototypes */
static void formrdesc(char *relationName, u_int natts,
FormData_pg_attribute att[]);
#if 0 /* See comments at line 1304 */
static void RelationFlushIndexes(Relation *r, Oid accessMethodId);
#endif
static HeapTuple ScanPgRelation(RelationBuildDescInfo buildinfo);
static HeapTuple scan_pg_rel_seq(RelationBuildDescInfo buildinfo);
static HeapTuple scan_pg_rel_ind(RelationBuildDescInfo buildinfo);
static Relation AllocateRelationDesc(u_int natts, Form_pg_class relp);
static void RelationBuildTupleDesc(RelationBuildDescInfo buildinfo,
Relation relation, u_int natts);
static void build_tupdesc_seq(RelationBuildDescInfo buildinfo,
Relation relation, u_int natts);
static void build_tupdesc_ind(RelationBuildDescInfo buildinfo,
Relation relation, u_int natts);
static Relation RelationBuildDesc(RelationBuildDescInfo buildinfo);
static void IndexedAccessMethodInitialize(Relation relation);
static void AttrDefaultFetch (Relation relation);
/* /*
* newlyCreatedRelns - * newlyCreatedRelns -
* relations created during this transaction. We need to keep track of * relations created during this transaction. We need to keep track of
@ -268,7 +275,7 @@ static List *newlyCreatedRelns = NULL;
*/ */
#ifdef NOT_USED /* XXX This doesn't seem to be used anywhere */ #if NOT_USED /* XXX This doesn't seem to be used anywhere */
/* -------------------------------- /* --------------------------------
* BuildDescInfoError returns a string appropriate to * BuildDescInfoError returns a string appropriate to
* the buildinfo passed to it * the buildinfo passed to it
@ -481,7 +488,6 @@ AllocateRelationDesc(u_int natts, Form_pg_class relp)
static void static void
RelationBuildTupleDesc(RelationBuildDescInfo buildinfo, RelationBuildTupleDesc(RelationBuildDescInfo buildinfo,
Relation relation, Relation relation,
AttributeTupleForm attp,
u_int natts) u_int natts)
{ {
/* /*
@ -491,20 +497,26 @@ RelationBuildTupleDesc(RelationBuildDescInfo buildinfo,
*/ */
if (IsBootstrapProcessingMode()) if (IsBootstrapProcessingMode())
build_tupdesc_seq(buildinfo, relation, attp, natts); build_tupdesc_seq(buildinfo, relation, natts);
else else
build_tupdesc_ind(buildinfo, relation, attp, natts); {
relation->rd_att->constr = (AttrConstr *) palloc(sizeof(struct attrConstr));
relation->rd_att->constr->num_check = 0;
relation->rd_att->constr->num_defval = 0;
relation->rd_att->constr->has_not_null = false;
build_tupdesc_ind(buildinfo, relation, natts);
}
} }
static void static void
build_tupdesc_seq(RelationBuildDescInfo buildinfo, build_tupdesc_seq(RelationBuildDescInfo buildinfo,
Relation relation, Relation relation,
AttributeTupleForm attp,
u_int natts) u_int natts)
{ {
HeapTuple pg_attribute_tuple; HeapTuple pg_attribute_tuple;
Relation pg_attribute_desc; Relation pg_attribute_desc;
HeapScanDesc pg_attribute_scan; HeapScanDesc pg_attribute_scan;
AttributeTupleForm attp;
ScanKeyData key; ScanKeyData key;
int need; int need;
@ -530,9 +542,6 @@ build_tupdesc_seq(RelationBuildDescInfo buildinfo,
* ---------------- * ----------------
*/ */
need = natts; need = natts;
if (!relation->rd_att->constr)
relation->rd_att->constr = (AttrConstr *) palloc(sizeof(struct attrConstr));
relation->rd_att->constr->has_not_null = false;
pg_attribute_tuple = heap_getnext(pg_attribute_scan, 0, (Buffer *) NULL); pg_attribute_tuple = heap_getnext(pg_attribute_scan, 0, (Buffer *) NULL);
while (HeapTupleIsValid(pg_attribute_tuple) && need > 0) { while (HeapTupleIsValid(pg_attribute_tuple) && need > 0) {
@ -545,11 +554,6 @@ build_tupdesc_seq(RelationBuildDescInfo buildinfo,
memmove((char *) (relation->rd_att->attrs[attp->attnum - 1]), memmove((char *) (relation->rd_att->attrs[attp->attnum - 1]),
(char *) attp, (char *) attp,
ATTRIBUTE_TUPLE_SIZE); ATTRIBUTE_TUPLE_SIZE);
/* Update if this attribute have a constraint */
if (attp->attnotnull)
relation->rd_att->constr->has_not_null = true;
need--; need--;
} }
pg_attribute_tuple = heap_getnext(pg_attribute_scan, pg_attribute_tuple = heap_getnext(pg_attribute_scan,
@ -571,17 +575,15 @@ build_tupdesc_seq(RelationBuildDescInfo buildinfo,
static void static void
build_tupdesc_ind(RelationBuildDescInfo buildinfo, build_tupdesc_ind(RelationBuildDescInfo buildinfo,
Relation relation, Relation relation,
AttributeTupleForm attp,
u_int natts) u_int natts)
{ {
Relation attrel; Relation attrel;
HeapTuple atttup; HeapTuple atttup;
AttributeTupleForm attp;
AttrDefault *attrdef = NULL;
int ndef = 0;
int i; int i;
if (!relation->rd_att->constr)
relation->rd_att->constr = (AttrConstr *) palloc(sizeof(struct attrConstr));
relation->rd_att->constr->has_not_null = false;
attrel = heap_openr(AttributeRelationName); attrel = heap_openr(AttributeRelationName);
for (i = 1; i <= relation->rd_rel->relnatts; i++) { for (i = 1; i <= relation->rd_rel->relnatts; i++) {
@ -589,8 +591,8 @@ build_tupdesc_ind(RelationBuildDescInfo buildinfo,
atttup = (HeapTuple) AttributeNumIndexScan(attrel, relation->rd_id, i); atttup = (HeapTuple) AttributeNumIndexScan(attrel, relation->rd_id, i);
if (!HeapTupleIsValid(atttup)) if (!HeapTupleIsValid(atttup))
elog(WARN, "cannot find attribute %d of relation %.16s", i, elog(WARN, "cannot find attribute %d of relation %.*s", i,
&(relation->rd_rel->relname.data[0])); NAMEDATALEN, &(relation->rd_rel->relname.data[0]));
attp = (AttributeTupleForm) GETSTRUCT(atttup); attp = (AttributeTupleForm) GETSTRUCT(atttup);
relation->rd_att->attrs[i - 1] = relation->rd_att->attrs[i - 1] =
@ -603,9 +605,32 @@ build_tupdesc_ind(RelationBuildDescInfo buildinfo,
/* Update if this attribute have a constraint */ /* Update if this attribute have a constraint */
if (attp->attnotnull) if (attp->attnotnull)
relation->rd_att->constr->has_not_null = true; relation->rd_att->constr->has_not_null = true;
if (attp->atthasdef)
{
if ( attrdef == NULL )
attrdef = (AttrDefault*) palloc (relation->rd_rel->relnatts *
sizeof (AttrDefault));
attrdef[ndef].adnum = i;
attrdef[ndef].adbin = NULL;
attrdef[ndef].adsrc = NULL;
ndef++;
}
} }
heap_close(attrel); heap_close(attrel);
if ( ndef > 0 )
{
if ( ndef > relation->rd_rel->relnatts )
relation->rd_att->constr->defval = (AttrDefault*)
repalloc (attrdef, ndef * sizeof (AttrDefault));
else
relation->rd_att->constr->defval = attrdef;
relation->rd_att->constr->num_defval = ndef;
AttrDefaultFetch (relation);
}
} }
/* -------------------------------- /* --------------------------------
@ -759,7 +784,6 @@ RelationBuildDesc(RelationBuildDescInfo buildinfo)
Oid relid; Oid relid;
Oid relam; Oid relam;
Form_pg_class relp; Form_pg_class relp;
AttributeTupleForm attp = NULL;
MemoryContext oldcxt; MemoryContext oldcxt;
@ -834,7 +858,7 @@ RelationBuildDesc(RelationBuildDescInfo buildinfo)
* already allocated for it by AllocateRelationDesc. * already allocated for it by AllocateRelationDesc.
* ---------------- * ----------------
*/ */
RelationBuildTupleDesc(buildinfo, relation, attp, natts); RelationBuildTupleDesc(buildinfo, relation, natts);
/* ---------------- /* ----------------
* initialize rules that affect this relation * initialize rules that affect this relation
@ -1346,7 +1370,7 @@ RelationIdInvalidateRelationCacheByRelationId(Oid relationId)
} }
} }
#ifdef NOT_USED /* See comments at line 1304 */ #if NOT_USED /* See comments at line 1304 */
/* -------------------------------- /* --------------------------------
* RelationIdInvalidateRelationCacheByAccessMethodId * RelationIdInvalidateRelationCacheByAccessMethodId
* *
@ -1576,6 +1600,95 @@ RelationInitialize(void)
MemoryContextSwitchTo(oldcxt); MemoryContextSwitchTo(oldcxt);
} }
static void
AttrDefaultFetch (Relation relation)
{
AttrDefault *attrdef = relation->rd_att->constr->defval;
int ndef = relation->rd_att->constr->num_defval;
Relation adrel;
Relation irel;
ScanKeyData skey;
HeapTuple tuple;
Form_pg_attrdef adform;
IndexScanDesc sd;
RetrieveIndexResult indexRes;
Buffer buffer;
ItemPointer iptr;
struct varlena *val;
bool isnull;
int found;
int i;
ScanKeyEntryInitialize(&skey,
(bits16)0x0,
(AttrNumber)1,
(RegProcedure)ObjectIdEqualRegProcedure,
ObjectIdGetDatum(relation->rd_id));
adrel = heap_openr(AttrDefaultRelationName);
irel = index_openr(AttrDefaultIndex);
sd = index_beginscan(irel, false, 1, &skey);
tuple = (HeapTuple)NULL;
for (found = 0; ; )
{
indexRes = index_getnext(sd, ForwardScanDirection);
if (!indexRes)
break;
iptr = &indexRes->heap_iptr;
tuple = heap_fetch(adrel, NowTimeQual, iptr, &buffer);
pfree(indexRes);
if (!HeapTupleIsValid(tuple))
continue;
adform = (Form_pg_attrdef) GETSTRUCT(tuple);
for (i = 1; i <= ndef; i++)
{
if ( adform->adnum != attrdef[i].adnum )
continue;
if ( attrdef[i].adsrc != NULL )
elog (WARN, "AttrDefaultFetch: second record found for attr %.*s in rel %.*s",
NAMEDATALEN, relation->rd_att->attrs[adform->adnum - 1]->attname.data,
NAMEDATALEN, relation->rd_rel->relname.data);
val = (struct varlena*) fastgetattr (tuple,
Anum_pg_attrdef_adbin,
adrel->rd_att, &isnull);
if ( isnull )
elog (WARN, "AttrDefaultFetch: adbin IS NULL for attr %.*s in rel %.*s",
NAMEDATALEN, relation->rd_att->attrs[adform->adnum - 1]->attname.data,
NAMEDATALEN, relation->rd_rel->relname.data);
attrdef[i].adbin = textout (val);
val = (struct varlena*) fastgetattr (tuple,
Anum_pg_attrdef_adsrc,
adrel->rd_att, &isnull);
if ( isnull )
elog (WARN, "AttrDefaultFetch: adsrc IS NULL for attr %.*s in rel %.*s",
NAMEDATALEN, relation->rd_att->attrs[adform->adnum - 1]->attname.data,
NAMEDATALEN, relation->rd_rel->relname.data);
attrdef[i].adsrc = textout (val);
found++;
}
if ( i > ndef )
elog (WARN, "AttrDefaultFetch: unexpected record found for attr %d in rel %.*s",
adform->adnum,
NAMEDATALEN, relation->rd_rel->relname.data);
ReleaseBuffer(buffer);
}
if ( found < ndef )
elog (WARN, "AttrDefaultFetch: %d record not found for rel %.*s",
ndef - found,
NAMEDATALEN, relation->rd_rel->relname.data);
index_endscan (sd);
pfree (sd);
index_close (irel);
heap_close (adrel);
}
/* /*
* init_irels(), write_irels() -- handle special-case initialization of * init_irels(), write_irels() -- handle special-case initialization of
* index relation descriptors. * index relation descriptors.