Movatterモバイル変換

[0]ホーム
URL:

Skip to content

Navigation Menu

Sign in
Appearance settings

Search code, repositories, users, issues, pull requests...

Provide feedback

We read every piece of feedback, and take your input very seriously.

Saved searches

Use saved searches to filter your results more quickly

 Sign up
Appearance settings

Commita160423

Browse files
committed
Refactor ATExecAddColumn() to use BuildDescForRelation()
BuildDescForRelation() has all the knowledge for converting aColumnDef into pg_attribute/tuple descriptor. ATExecAddColumn() canmake use of that, instead of duplicating all that logic. We just passa one-element list of ColumnDef and we get back exactly the datastructure we need. Note that we don't even need to touchBuildDescForRelation() to make this work.Reviewed-by: Alvaro Herrera <alvherre@alvh.no-ip.org>Discussion:https://www.postgresql.org/message-id/flat/52a125e4-ff9a-95f5-9f61-b87cf447e4da@eisentraut.org
1 parent882887e commita160423

File tree

1 file changed

+22
-67
lines changed

1 file changed

+22
-67
lines changed

‎src/backend/commands/tablecmds.c‎

Lines changed: 22 additions & 67 deletions
Original file line numberDiff line numberDiff line change
@@ -6984,22 +6984,15 @@ ATExecAddColumn(List **wqueue, AlteredTableInfo *tab, Relation rel,
69846984
Relationpgclass,
69856985
attrdesc;
69866986
HeapTuplereltup;
6987-
FormData_pg_attribute attribute;
6987+
Form_pg_attribute attribute;
69886988
intnewattnum;
69896989
charrelkind;
6990-
HeapTupletypeTuple;
6991-
OidtypeOid;
6992-
int32typmod;
6993-
OidcollOid;
6994-
Form_pg_type tform;
69956990
Expr *defval;
69966991
List *children;
69976992
ListCell *child;
69986993
AlterTableCmd *childcmd;
6999-
AclResultaclresult;
70006994
ObjectAddress address;
70016995
TupleDesctupdesc;
7002-
FormData_pg_attribute *aattr[] = {&attribute};
70036996

70046997
/* At top level, permission check was done in ATPrepCmd, else do it */
70056998
if (recursing)
@@ -7121,59 +7114,21 @@ ATExecAddColumn(List **wqueue, AlteredTableInfo *tab, Relation rel,
71217114
errmsg("tables can have at most %d columns",
71227115
MaxHeapAttributeNumber)));
71237116

7124-
typeTuple = typenameType(NULL, colDef->typeName, &typmod);
7125-
tform = (Form_pg_type) GETSTRUCT(typeTuple);
7126-
typeOid = tform->oid;
7117+
/*
7118+
* Construct new attribute's pg_attribute entry.
7119+
*/
7120+
tupdesc = BuildDescForRelation(list_make1(colDef));
71277121

7128-
aclresult = object_aclcheck(TypeRelationId, typeOid, GetUserId(), ACL_USAGE);
7129-
if (aclresult != ACLCHECK_OK)
7130-
aclcheck_error_type(aclresult, typeOid);
7122+
attribute = TupleDescAttr(tupdesc, 0);
71317123

7132-
collOid = GetColumnDefCollation(NULL, colDef, typeOid);
7124+
/* Fix up attribute number */
7125+
attribute->attnum = newattnum;
71337126

71347127
/* make sure datatype is legal for a column */
7135-
CheckAttributeType(colDef->colname, typeOid, collOid,
7128+
CheckAttributeType(NameStr(attribute->attname), attribute->atttypid, attribute->attcollation,
71367129
list_make1_oid(rel->rd_rel->reltype),
71377130
0);
71387131

7139-
/*
7140-
* Construct new attribute's pg_attribute entry. (Variable-length fields
7141-
* are handled by InsertPgAttributeTuples().)
7142-
*/
7143-
attribute.attrelid = myrelid;
7144-
namestrcpy(&(attribute.attname), colDef->colname);
7145-
attribute.atttypid = typeOid;
7146-
attribute.attstattarget = -1;
7147-
attribute.attlen = tform->typlen;
7148-
attribute.attnum = newattnum;
7149-
if (list_length(colDef->typeName->arrayBounds) > PG_INT16_MAX)
7150-
ereport(ERROR,
7151-
errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
7152-
errmsg("too many array dimensions"));
7153-
attribute.attndims = list_length(colDef->typeName->arrayBounds);
7154-
attribute.atttypmod = typmod;
7155-
attribute.attbyval = tform->typbyval;
7156-
attribute.attalign = tform->typalign;
7157-
if (colDef->storage_name)
7158-
attribute.attstorage = GetAttributeStorage(typeOid, colDef->storage_name);
7159-
else
7160-
attribute.attstorage = tform->typstorage;
7161-
attribute.attcompression = GetAttributeCompression(typeOid,
7162-
colDef->compression);
7163-
attribute.attnotnull = colDef->is_not_null;
7164-
attribute.atthasdef = false;
7165-
attribute.atthasmissing = false;
7166-
attribute.attidentity = colDef->identity;
7167-
attribute.attgenerated = colDef->generated;
7168-
attribute.attisdropped = false;
7169-
attribute.attislocal = colDef->is_local;
7170-
attribute.attinhcount = colDef->inhcount;
7171-
attribute.attcollation = collOid;
7172-
7173-
ReleaseSysCache(typeTuple);
7174-
7175-
tupdesc = CreateTupleDesc(lengthof(aattr), (FormData_pg_attribute **) &aattr);
7176-
71777132
InsertPgAttributeTuples(attrdesc, tupdesc, myrelid, NULL, NULL);
71787133

71797134
table_close(attrdesc, RowExclusiveLock);
@@ -7203,7 +7158,7 @@ ATExecAddColumn(List **wqueue, AlteredTableInfo *tab, Relation rel,
72037158
RawColumnDefault *rawEnt;
72047159

72057160
rawEnt = (RawColumnDefault *) palloc(sizeof(RawColumnDefault));
7206-
rawEnt->attnum = attribute.attnum;
7161+
rawEnt->attnum = attribute->attnum;
72077162
rawEnt->raw_default = copyObject(colDef->raw_default);
72087163

72097164
/*
@@ -7277,31 +7232,31 @@ ATExecAddColumn(List **wqueue, AlteredTableInfo *tab, Relation rel,
72777232
NextValueExpr *nve = makeNode(NextValueExpr);
72787233

72797234
nve->seqid = RangeVarGetRelid(colDef->identitySequence, NoLock, false);
7280-
nve->typeId =typeOid;
7235+
nve->typeId =attribute->atttypid;
72817236

72827237
defval = (Expr *) nve;
72837238

72847239
/* must do a rewrite for identity columns */
72857240
tab->rewrite |= AT_REWRITE_DEFAULT_VAL;
72867241
}
72877242
else
7288-
defval = (Expr *) build_column_default(rel, attribute.attnum);
7243+
defval = (Expr *) build_column_default(rel, attribute->attnum);
72897244

7290-
if (!defval && DomainHasConstraints(typeOid))
7245+
if (!defval && DomainHasConstraints(attribute->atttypid))
72917246
{
72927247
OidbaseTypeId;
72937248
int32baseTypeMod;
72947249
OidbaseTypeColl;
72957250

7296-
baseTypeMod =typmod;
7297-
baseTypeId = getBaseTypeAndTypmod(typeOid, &baseTypeMod);
7251+
baseTypeMod =attribute->atttypmod;
7252+
baseTypeId = getBaseTypeAndTypmod(attribute->atttypid, &baseTypeMod);
72987253
baseTypeColl = get_typcollation(baseTypeId);
72997254
defval = (Expr *) makeNullConst(baseTypeId, baseTypeMod, baseTypeColl);
73007255
defval = (Expr *) coerce_to_target_type(NULL,
73017256
(Node *) defval,
73027257
baseTypeId,
7303-
typeOid,
7304-
typmod,
7258+
attribute->atttypid,
7259+
attribute->atttypmod,
73057260
COERCION_ASSIGNMENT,
73067261
COERCE_IMPLICIT_CAST,
73077262
-1);
@@ -7314,17 +7269,17 @@ ATExecAddColumn(List **wqueue, AlteredTableInfo *tab, Relation rel,
73147269
NewColumnValue *newval;
73157270

73167271
newval = (NewColumnValue *) palloc0(sizeof(NewColumnValue));
7317-
newval->attnum = attribute.attnum;
7272+
newval->attnum = attribute->attnum;
73187273
newval->expr = expression_planner(defval);
73197274
newval->is_generated = (colDef->generated != '\0');
73207275

73217276
tab->newvals = lappend(tab->newvals, newval);
73227277
}
73237278

7324-
if (DomainHasConstraints(typeOid))
7279+
if (DomainHasConstraints(attribute->atttypid))
73257280
tab->rewrite |= AT_REWRITE_DEFAULT_VAL;
73267281

7327-
if (!TupleDescAttr(rel->rd_att, attribute.attnum - 1)->atthasmissing)
7282+
if (!TupleDescAttr(rel->rd_att, attribute->attnum - 1)->atthasmissing)
73287283
{
73297284
/*
73307285
* If the new column is NOT NULL, and there is no missing value,
@@ -7337,8 +7292,8 @@ ATExecAddColumn(List **wqueue, AlteredTableInfo *tab, Relation rel,
73377292
/*
73387293
* Add needed dependency entries for the new column.
73397294
*/
7340-
add_column_datatype_dependency(myrelid, newattnum, attribute.atttypid);
7341-
add_column_collation_dependency(myrelid, newattnum, attribute.attcollation);
7295+
add_column_datatype_dependency(myrelid, newattnum, attribute->atttypid);
7296+
add_column_collation_dependency(myrelid, newattnum, attribute->attcollation);
73427297

73437298
/*
73447299
* Propagate to children as appropriate. Unlike most other ALTER

0 commit comments

Comments
 (0)
[8]ページ先頭
©2009-2025 Movatter.jp