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Remove collation information from TypeName, where it does not belong. 

The initial collations patch treated a COLLATE spec as part of a TypeName,
following what can only be described as brain fade on the part of the SQL
committee.  It's a lot more reasonable to treat COLLATE as a syntactically
separate object, so that it can be added in only the productions where it
actually belongs, rather than needing to reject it in a boatload of places
where it doesn't belong (something the original patch mostly failed to do).
In addition this change lets us meet the spec's requirement to allow
COLLATE anywhere in the clauses of a ColumnDef, and it avoids unfriendly
behavior for constructs such as "foo::type COLLATE collation".

To do this, pull collation information out of TypeName and put it in
ColumnDef instead, thus reverting most of the collation-related changes in
parse_type.c's API.  I made one additional structural change, which was to
use a ColumnDef as an intermediate node in AT_AlterColumnType AlterTableCmd
nodes.  This provides enough room to get rid of the "transform" wart in
AlterTableCmd too, since the ColumnDef can carry the USING expression
easily enough.

Also fix some other minor bugs that have crept in in the same areas,
like failure to copy recently-added fields of ColumnDef in copyfuncs.c.

While at it, document the formerly secret ability to specify a collation
in ALTER TABLE ALTER COLUMN TYPE, ALTER TYPE ADD ATTRIBUTE, and
ALTER TYPE ALTER ATTRIBUTE TYPE; and correct some misstatements about
what the default collation selection will be when COLLATE is omitted.

BTW, the three-parameter form of format_type() should go away too,
since it just contributes to the confusion in this area; but I'll do
that in a separate patch.
This commit is contained in:
Tom Lane 2011-03-09 22:38:52 -05:00
parent 01752f7bba
commit a051ef699c
28 changed files with 412 additions and 246 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
doc/src/sgml/ref/alter_table.sgml
View File

@ -32,9 +32,9 @@ ALTER TABLE <replaceable class="PARAMETER">name</replaceable>
<phrase>where <replaceable class="PARAMETER">action</replaceable> is one of:</phrase>
ADD [ COLUMN ] <replaceable class="PARAMETER">column</replaceable> <replaceable class="PARAMETER">data_type</replaceable> [ <replaceable class="PARAMETER">column_constraint</replaceable> [ ... ] ]
ADD [ COLUMN ] <replaceable class="PARAMETER">column</replaceable> <replaceable class="PARAMETER">data_type</replaceable> [ COLLATE <replaceable class="PARAMETER">collation</replaceable> ] [ <replaceable class="PARAMETER">column_constraint</replaceable> [ ... ] ]
DROP [ COLUMN ] [ IF EXISTS ] <replaceable class="PARAMETER">column</replaceable> [ RESTRICT | CASCADE ]
ALTER [ COLUMN ] <replaceable class="PARAMETER">column</replaceable> [ SET DATA ] TYPE <replaceable class="PARAMETER">type</replaceable> [ USING <replaceable class="PARAMETER">expression</replaceable> ]
ALTER [ COLUMN ] <replaceable class="PARAMETER">column</replaceable> [ SET DATA ] TYPE <replaceable class="PARAMETER">data_type</replaceable> [ COLLATE <replaceable class="PARAMETER">collation</replaceable> ] [ USING <replaceable class="PARAMETER">expression</replaceable> ]
ALTER [ COLUMN ] <replaceable class="PARAMETER">column</replaceable> SET DEFAULT <replaceable class="PARAMETER">expression</replaceable>
ALTER [ COLUMN ] <replaceable class="PARAMETER">column</replaceable> DROP DEFAULT
ALTER [ COLUMN ] <replaceable class="PARAMETER">column</replaceable> { SET | DROP } NOT NULL
@ -115,7 +115,11 @@ ALTER TABLE <replaceable class="PARAMETER">name</replaceable>
This form changes the type of a column of a table. Indexes and
simple table constraints involving the column will be automatically
converted to use the new column type by reparsing the originally
supplied expression. The optional <literal>USING</literal>
supplied expression.
The optional <literal>COLLATE</literal> clause specifies a collation
for the new column; if omitted, the collation is the default for the
new column type.
The optional <literal>USING</literal>
clause specifies how to compute the new column value from the old;
if omitted, the default conversion is the same as an assignment
cast from old data type to new. A <literal>USING</literal>

4
doc/src/sgml/ref/alter_type.sgml
View File

@ -32,9 +32,9 @@ ALTER TYPE <replaceable class="PARAMETER">name</replaceable> ADD VALUE <replacea
<phrase>where <replaceable class="PARAMETER">action</replaceable> is one of:</phrase>
ADD ATTRIBUTE <replaceable class="PARAMETER">attribute_name</replaceable> <replaceable class="PARAMETER">data_type</replaceable> [ CASCADE | RESTRICT ]
ADD ATTRIBUTE <replaceable class="PARAMETER">attribute_name</replaceable> <replaceable class="PARAMETER">data_type</replaceable> [ COLLATE <replaceable class="PARAMETER">collation</replaceable> ] [ CASCADE | RESTRICT ]
DROP ATTRIBUTE [ IF EXISTS ] <replaceable class="PARAMETER">attribute_name</replaceable> [ CASCADE | RESTRICT ]
ALTER ATTRIBUTE <replaceable class="PARAMETER">attribute_name</replaceable> [ SET DATA ] TYPE <replaceable class="PARAMETER">data_type</replaceable> [ CASCADE | RESTRICT ]
ALTER ATTRIBUTE <replaceable class="PARAMETER">attribute_name</replaceable> [ SET DATA ] TYPE <replaceable class="PARAMETER">data_type</replaceable> [ COLLATE <replaceable class="PARAMETER">collation</replaceable> ] [ CASCADE | RESTRICT ]
</synopsis>
</refsynopsisdiv>

5
doc/src/sgml/ref/create_domain.sgml
View File

@ -89,8 +89,9 @@ CREATE DOMAIN <replaceable class="parameter">name</replaceable> [ AS ] <replacea
<listitem>
<para>
An optional collation for the domain. If no collation is
specified, the database default collation is used (which can
be overridden when the domain is used to define a column).
specified, the underlying data type's default collation is used.
The underlying type must be collatable when <literal>COLLATE</>
is specified.
</para>
</listitem>
</varlistentry>

6
doc/src/sgml/ref/create_table.sgml
View File

@ -248,9 +248,9 @@ CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } | UNLOGGED ] TABLE [ IF NOT EXI
<term><literal>COLLATE <replaceable>collation</replaceable></literal></term>
<listitem>
<para>
The <literal>COLLATE</> clause assigns a nondefault collation to
the column. By default, the locale settings of the database are
used.
The <literal>COLLATE</> clause assigns a collation to
the column (which must be of a collatable data type).
If not specified, the column data type's default collation is used.
</para>
</listitem>
</varlistentry>

3
src/backend/access/common/tupdesc.c
View File

@ -559,7 +559,8 @@ BuildDescForRelation(List *schema)
attnum++;
attname = entry->colname;
typenameTypeIdModColl(NULL, entry->typeName, &atttypid, &atttypmod, &attcollation);
typenameTypeIdAndMod(NULL, entry->typeName, &atttypid, &atttypmod);
attcollation = GetColumnDefCollation(NULL, entry, atttypid);
attdim = list_length(entry->typeName->arrayBounds);
if (entry->typeName->setof)

2
src/backend/commands/collationcmds.c
View File

@ -98,7 +98,7 @@ DefineCollation(List *names, List *parameters)
Oid collid;
HeapTuple tp;
collid = LookupCollation(NULL, defGetQualifiedName(fromEl), -1);
collid = get_collation_oid(defGetQualifiedName(fromEl), false);
tp = SearchSysCache1(COLLOID, ObjectIdGetDatum(collid));
if (!HeapTupleIsValid(tp))
elog(ERROR, "cache lookup failed for collation %u", collid);

4
src/backend/commands/functioncmds.c
View File

@ -87,7 +87,7 @@ compute_return_type(TypeName *returnType, Oid languageOid,
Oid rettype;
Type typtup;
typtup = LookupTypeName(NULL, returnType, NULL, NULL);
typtup = LookupTypeName(NULL, returnType, NULL);
if (typtup)
{
@ -207,7 +207,7 @@ examine_parameter_list(List *parameters, Oid languageOid,
Oid toid;
Type typtup;
typtup = LookupTypeName(NULL, t, NULL, NULL);
typtup = LookupTypeName(NULL, t, NULL);
if (typtup)
{
if (!((Form_pg_type) GETSTRUCT(typtup))->typisdefined)

23
src/backend/commands/sequence.c
View File

@ -139,9 +139,12 @@ DefineSequence(CreateSeqStmt *seq)
coldef->inhcount = 0;
coldef->is_local = true;
coldef->is_not_null = true;
coldef->is_from_type = false;
coldef->storage = 0;
coldef->raw_default = NULL;
coldef->cooked_default = NULL;
coldef->collClause = NULL;
coldef->collOid = InvalidOid;
coldef->constraints = NIL;
null[i - 1] = false;
@ -149,53 +152,53 @@ DefineSequence(CreateSeqStmt *seq)
switch (i)
{
case SEQ_COL_NAME:
coldef->typeName = makeTypeNameFromOid(NAMEOID, -1, InvalidOid);
coldef->typeName = makeTypeNameFromOid(NAMEOID, -1);
coldef->colname = "sequence_name";
namestrcpy(&name, seq->sequence->relname);
value[i - 1] = NameGetDatum(&name);
break;
case SEQ_COL_LASTVAL:
coldef->typeName = makeTypeNameFromOid(INT8OID, -1, InvalidOid);
coldef->typeName = makeTypeNameFromOid(INT8OID, -1);
coldef->colname = "last_value";
value[i - 1] = Int64GetDatumFast(new.last_value);
break;
case SEQ_COL_STARTVAL:
coldef->typeName = makeTypeNameFromOid(INT8OID, -1, InvalidOid);
coldef->typeName = makeTypeNameFromOid(INT8OID, -1);
coldef->colname = "start_value";
value[i - 1] = Int64GetDatumFast(new.start_value);
break;
case SEQ_COL_INCBY:
coldef->typeName = makeTypeNameFromOid(INT8OID, -1, InvalidOid);
coldef->typeName = makeTypeNameFromOid(INT8OID, -1);
coldef->colname = "increment_by";
value[i - 1] = Int64GetDatumFast(new.increment_by);
break;
case SEQ_COL_MAXVALUE:
coldef->typeName = makeTypeNameFromOid(INT8OID, -1, InvalidOid);
coldef->typeName = makeTypeNameFromOid(INT8OID, -1);
coldef->colname = "max_value";
value[i - 1] = Int64GetDatumFast(new.max_value);
break;
case SEQ_COL_MINVALUE:
coldef->typeName = makeTypeNameFromOid(INT8OID, -1, InvalidOid);
coldef->typeName = makeTypeNameFromOid(INT8OID, -1);
coldef->colname = "min_value";
value[i - 1] = Int64GetDatumFast(new.min_value);
break;
case SEQ_COL_CACHE:
coldef->typeName = makeTypeNameFromOid(INT8OID, -1, InvalidOid);
coldef->typeName = makeTypeNameFromOid(INT8OID, -1);
coldef->colname = "cache_value";
value[i - 1] = Int64GetDatumFast(new.cache_value);
break;
case SEQ_COL_LOG:
coldef->typeName = makeTypeNameFromOid(INT8OID, -1, InvalidOid);
coldef->typeName = makeTypeNameFromOid(INT8OID, -1);
coldef->colname = "log_cnt";
value[i - 1] = Int64GetDatum((int64) 1);
break;
case SEQ_COL_CYCLE:
coldef->typeName = makeTypeNameFromOid(BOOLOID, -1, InvalidOid);
coldef->typeName = makeTypeNameFromOid(BOOLOID, -1);
coldef->colname = "is_cycled";
value[i - 1] = BoolGetDatum(new.is_cycled);
break;
case SEQ_COL_CALLED:
coldef->typeName = makeTypeNameFromOid(BOOLOID, -1, InvalidOid);
coldef->typeName = makeTypeNameFromOid(BOOLOID, -1);
coldef->colname = "is_called";
value[i - 1] = BoolGetDatum(false);
break;

65
src/backend/commands/tablecmds.c
View File

@ -339,7 +339,7 @@ static void ATPrepAlterColumnType(List **wqueue,
AlterTableCmd *cmd, LOCKMODE lockmode);
static bool ATColumnChangeRequiresRewrite(Node *expr, AttrNumber varattno);
static void ATExecAlterColumnType(AlteredTableInfo *tab, Relation rel,
const char *colName, TypeName *typeName, LOCKMODE lockmode);
AlterTableCmd *cmd, LOCKMODE lockmode);
static void ATPostAlterTypeCleanup(List **wqueue, AlteredTableInfo *tab, LOCKMODE lockmode);
static void ATPostAlterTypeParse(char *cmd, List **wqueue, LOCKMODE lockmode);
static void change_owner_recurse_to_sequences(Oid relationOid,
@ -1433,7 +1433,7 @@ MergeAttributes(List *schema, List *supers, char relpersistence,
(errmsg("merging multiple inherited definitions of column \"%s\"",
attributeName)));
def = (ColumnDef *) list_nth(inhSchema, exist_attno - 1);
typenameTypeIdModColl(NULL, def->typeName, &defTypeId, &deftypmod, &defCollId);
typenameTypeIdAndMod(NULL, def->typeName, &defTypeId, &deftypmod);
if (defTypeId != attribute->atttypid ||
deftypmod != attribute->atttypmod)
ereport(ERROR,
@ -1443,6 +1443,7 @@ MergeAttributes(List *schema, List *supers, char relpersistence,
errdetail("%s versus %s",
TypeNameToString(def->typeName),
format_type_be(attribute->atttypid))));
defCollId = GetColumnDefCollation(NULL, def, defTypeId);
if (defCollId != attribute->attcollation)
ereport(ERROR,
(errcode(ERRCODE_COLLATION_MISMATCH),
@ -1478,14 +1479,16 @@ MergeAttributes(List *schema, List *supers, char relpersistence,
def = makeNode(ColumnDef);
def->colname = pstrdup(attributeName);
def->typeName = makeTypeNameFromOid(attribute->atttypid,
attribute->atttypmod,
attribute->attcollation);
attribute->atttypmod);
def->inhcount = 1;
def->is_local = false;
def->is_not_null = attribute->attnotnull;
def->is_from_type = false;
def->storage = attribute->attstorage;
def->raw_default = NULL;
def->cooked_default = NULL;
def->collClause = NULL;
def->collOid = attribute->attcollation;
def->constraints = NIL;
inhSchema = lappend(inhSchema, def);
newattno[parent_attno - 1] = ++child_attno;
@ -1616,8 +1619,8 @@ MergeAttributes(List *schema, List *supers, char relpersistence,
(errmsg("merging column \"%s\" with inherited definition",
attributeName)));
def = (ColumnDef *) list_nth(inhSchema, exist_attno - 1);
typenameTypeIdModColl(NULL, def->typeName, &defTypeId, &deftypmod, &defcollid);
typenameTypeIdModColl(NULL, newdef->typeName, &newTypeId, &newtypmod, &newcollid);
typenameTypeIdAndMod(NULL, def->typeName, &defTypeId, &deftypmod);
typenameTypeIdAndMod(NULL, newdef->typeName, &newTypeId, &newtypmod);
if (defTypeId != newTypeId || deftypmod != newtypmod)
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
@ -1626,6 +1629,8 @@ MergeAttributes(List *schema, List *supers, char relpersistence,
errdetail("%s versus %s",
TypeNameToString(def->typeName),
TypeNameToString(newdef->typeName))));
defcollid = GetColumnDefCollation(NULL, def, defTypeId);
newcollid = GetColumnDefCollation(NULL, newdef, newTypeId);
if (defcollid != newcollid)
ereport(ERROR,
(errcode(ERRCODE_COLLATION_MISMATCH),
@ -3092,7 +3097,7 @@ ATExecCmd(List **wqueue, AlteredTableInfo *tab, Relation rel,
cmd->missing_ok, lockmode);
break;
case AT_AlterColumnType: /* ALTER COLUMN TYPE */
ATExecAlterColumnType(tab, rel, cmd->name, (TypeName *) cmd->def, lockmode);
ATExecAlterColumnType(tab, rel, cmd, lockmode);
break;
case AT_ChangeOwner: /* ALTER OWNER */
ATExecChangeOwner(RelationGetRelid(rel),
@ -4129,13 +4134,14 @@ ATExecAddColumn(AlteredTableInfo *tab, Relation rel,
Oid ccollid;
/* Child column must match by type */
typenameTypeIdModColl(NULL, colDef->typeName, &ctypeId, &ctypmod, &ccollid);
typenameTypeIdAndMod(NULL, colDef->typeName, &ctypeId, &ctypmod);
if (ctypeId != childatt->atttypid ||
ctypmod != childatt->atttypmod)
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("child table \"%s\" has different type for column \"%s\"",
RelationGetRelationName(rel), colDef->colname)));
ccollid = GetColumnDefCollation(NULL, colDef, ctypeId);
if (ccollid != childatt->attcollation)
ereport(ERROR,
(errcode(ERRCODE_COLLATION_MISMATCH),
@ -4201,9 +4207,10 @@ ATExecAddColumn(AlteredTableInfo *tab, Relation rel,
MaxHeapAttributeNumber)));
}
typeTuple = typenameType(NULL, colDef->typeName, &typmod, &collOid);
typeTuple = typenameType(NULL, colDef->typeName, &typmod);
tform = (Form_pg_type) GETSTRUCT(typeTuple);
typeOid = HeapTupleGetOid(typeTuple);
collOid = GetColumnDefCollation(NULL, colDef, typeOid);
/* make sure datatype is legal for a column */
CheckAttributeType(colDef->colname, typeOid, collOid, false);
@ -4413,7 +4420,7 @@ ATPrepAddOids(List **wqueue, Relation rel, bool recurse, AlterTableCmd *cmd, LOC
ColumnDef *cdef = makeNode(ColumnDef);
cdef->colname = pstrdup("oid");
cdef->typeName = makeTypeNameFromOid(OIDOID, -1, InvalidOid);
cdef->typeName = makeTypeNameFromOid(OIDOID, -1);
cdef->inhcount = 0;
cdef->is_local = true;
cdef->is_not_null = true;
@ -6471,14 +6478,15 @@ ATPrepAlterColumnType(List **wqueue,
AlterTableCmd *cmd, LOCKMODE lockmode)
{
char *colName = cmd->name;
TypeName *typeName = (TypeName *) cmd->def;
ColumnDef *def = (ColumnDef *) cmd->def;
TypeName *typeName = def->typeName;
Node *transform = def->raw_default;
HeapTuple tuple;
Form_pg_attribute attTup;
AttrNumber attnum;
Oid targettype;
int32 targettypmod;
Oid targetcollid;
Node *transform;
NewColumnValue *newval;
ParseState *pstate = make_parsestate(NULL);
@ -6512,7 +6520,10 @@ ATPrepAlterColumnType(List **wqueue,
colName)));
/* Look up the target type */
typenameTypeIdModColl(NULL, typeName, &targettype, &targettypmod, &targetcollid);
typenameTypeIdAndMod(NULL, typeName, &targettype, &targettypmod);
/* And the collation */
targetcollid = GetColumnDefCollation(NULL, def, targettype);
/* make sure datatype is legal for a column */
CheckAttributeType(colName, targettype, targetcollid, false);
@ -6527,7 +6538,7 @@ ATPrepAlterColumnType(List **wqueue,
* because we need the expression to be parsed against the original table
* rowtype.
*/
if (cmd->transform)
if (transform)
{
RangeTblEntry *rte;
@ -6539,7 +6550,7 @@ ATPrepAlterColumnType(List **wqueue,
true);
addRTEtoQuery(pstate, rte, false, true, true);
transform = transformExpr(pstate, cmd->transform);
transform = transformExpr(pstate, transform);
/* It can't return a set */
if (expression_returns_set(transform))
@ -6592,16 +6603,13 @@ ATPrepAlterColumnType(List **wqueue,
if (ATColumnChangeRequiresRewrite(transform, attnum))
tab->rewrite = true;
}
else if (tab->relkind == RELKIND_FOREIGN_TABLE)
{
if (cmd->transform)
ereport(ERROR,
(errcode(ERRCODE_WRONG_OBJECT_TYPE),
errmsg("ALTER TYPE USING is not supported on foreign tables")));
}
else if (transform)
ereport(ERROR,
(errcode(ERRCODE_WRONG_OBJECT_TYPE),
errmsg("ALTER TYPE USING is only supported on plain tables")));
if (tab->relkind == RELKIND_COMPOSITE_TYPE
|| tab->relkind == RELKIND_FOREIGN_TABLE)
if (tab->relkind == RELKIND_COMPOSITE_TYPE ||
tab->relkind == RELKIND_FOREIGN_TABLE)
{
/*
* For composite types, do this check now. Tables will check
@ -6667,8 +6675,11 @@ ATColumnChangeRequiresRewrite(Node *expr, AttrNumber varattno)
static void
ATExecAlterColumnType(AlteredTableInfo *tab, Relation rel,
const char *colName, TypeName *typeName, LOCKMODE lockmode)
AlterTableCmd *cmd, LOCKMODE lockmode)
{
char *colName = cmd->name;
ColumnDef *def = (ColumnDef *) cmd->def;
TypeName *typeName = def->typeName;
HeapTuple heapTup;
Form_pg_attribute attTup;
AttrNumber attnum;
@ -6705,9 +6716,11 @@ ATExecAlterColumnType(AlteredTableInfo *tab, Relation rel,
colName)));
/* Look up the target type (should not fail, since prep found it) */
typeTuple = typenameType(NULL, typeName, &targettypmod, &targetcollid);
typeTuple = typenameType(NULL, typeName, &targettypmod);
tform = (Form_pg_type) GETSTRUCT(typeTuple);
targettype = HeapTupleGetOid(typeTuple);
/* And the collation */
targetcollid = GetColumnDefCollation(NULL, def, targettype);
/*
* If there is a default expression for the column, get it and ensure we

27
src/backend/commands/typecmds.c
View File

@ -292,7 +292,7 @@ DefineType(List *names, List *parameters)
Type likeType;
Form_pg_type likeForm;
likeType = typenameType(NULL, defGetTypeName(likeTypeEl), NULL, NULL);
likeType = typenameType(NULL, defGetTypeName(likeTypeEl), NULL);
likeForm = (Form_pg_type) GETSTRUCT(likeType);
internalLength = likeForm->typlen;
byValue = likeForm->typbyval;
@ -649,7 +649,7 @@ RemoveTypes(DropStmt *drop)
typename = makeTypeNameFromNameList(names);
/* Use LookupTypeName here so that shell types can be removed. */
tup = LookupTypeName(NULL, typename, NULL, NULL);
tup = LookupTypeName(NULL, typename, NULL);
if (tup == NULL)
{
if (!drop->missing_ok)
@ -774,6 +774,7 @@ DefineDomain(CreateDomainStmt *stmt)
Oid basetypeoid;
Oid domainoid;
Oid old_type_oid;
Oid domaincoll;
Form_pg_type baseType;
int32 basetypeMod;
Oid baseColl;
@ -807,7 +808,7 @@ DefineDomain(CreateDomainStmt *stmt)
/*
* Look up the base type.
*/
typeTup = typenameType(NULL, stmt->typeName, &basetypeMod, &baseColl);
typeTup = typenameType(NULL, stmt->typeName, &basetypeMod);
baseType = (Form_pg_type) GETSTRUCT(typeTup);
basetypeoid = HeapTupleGetOid(typeTup);
@ -825,6 +826,22 @@ DefineDomain(CreateDomainStmt *stmt)
errmsg("\"%s\" is not a valid base type for a domain",
TypeNameToString(stmt->typeName))));
/*
* Identify the collation if any
*/
baseColl = baseType->typcollation;
if (stmt->collClause)
domaincoll = get_collation_oid(stmt->collClause->collnames, false);
else
domaincoll = baseColl;
/* Complain if COLLATE is applied to an uncollatable type */
if (OidIsValid(domaincoll) && !OidIsValid(baseColl))
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("collations are not supported by type %s",
format_type_be(basetypeoid))));
/* passed by value */
byValue = baseType->typbyval;
@ -1051,7 +1068,7 @@ DefineDomain(CreateDomainStmt *stmt)
basetypeMod, /* typeMod value */
typNDims, /* Array dimensions for base type */
typNotNull, /* Type NOT NULL */
baseColl);
domaincoll);
/*
* Process constraints which refer to the domain ID returned by TypeCreate
@ -2629,7 +2646,7 @@ AlterTypeOwner(List *names, Oid newOwnerId)
typename = makeTypeNameFromNameList(names);
/* Use LookupTypeName here so that shell types can be processed */
tup = LookupTypeName(NULL, typename, NULL, NULL);
tup = LookupTypeName(NULL, typename, NULL);
if (tup == NULL)
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_OBJECT),

13
src/backend/commands/view.c
View File

@ -120,14 +120,23 @@ DefineVirtualRelation(const RangeVar *relation, List *tlist, bool replace)
def->colname = pstrdup(tle->resname);
def->typeName = makeTypeNameFromOid(exprType((Node *) tle->expr),
exprTypmod((Node *) tle->expr),
exprCollation((Node *) tle->expr));
exprTypmod((Node *) tle->expr));
def->inhcount = 0;
def->is_local = true;
def->is_not_null = false;
def->is_from_type = false;
def->storage = 0;
def->raw_default = NULL;
def->cooked_default = NULL;
def->collClause = NULL;
/*
* XXX Temporary kluge to make regression tests pass. We should
* be able to trust the result of exprCollation more than this.
*/
if (type_is_collatable(exprType((Node *) tle->expr)))
def->collOid = exprCollation((Node *) tle->expr);
else
def->collOid = InvalidOid;
def->constraints = NIL;
attrList = lappend(attrList, def);

7
src/backend/nodes/copyfuncs.c
View File

@ -2183,8 +2183,6 @@ _copyTypeName(TypeName *from)
COPY_NODE_FIELD(typmods);
COPY_SCALAR_FIELD(typemod);
COPY_NODE_FIELD(arrayBounds);
COPY_NODE_FIELD(collnames);
COPY_SCALAR_FIELD(collOid);
COPY_LOCATION_FIELD(location);
return newnode;
@ -2295,9 +2293,12 @@ _copyColumnDef(ColumnDef *from)
COPY_SCALAR_FIELD(inhcount);
COPY_SCALAR_FIELD(is_local);
COPY_SCALAR_FIELD(is_not_null);
COPY_SCALAR_FIELD(is_from_type);
COPY_SCALAR_FIELD(storage);
COPY_NODE_FIELD(raw_default);
COPY_NODE_FIELD(cooked_default);
COPY_NODE_FIELD(collClause);
COPY_SCALAR_FIELD(collOid);
COPY_NODE_FIELD(constraints);
return newnode;
@ -2515,7 +2516,6 @@ _copyAlterTableCmd(AlterTableCmd *from)
COPY_SCALAR_FIELD(subtype);
COPY_STRING_FIELD(name);
COPY_NODE_FIELD(def);
COPY_NODE_FIELD(transform);
COPY_SCALAR_FIELD(behavior);
COPY_SCALAR_FIELD(missing_ok);
@ -3063,6 +3063,7 @@ _copyCreateDomainStmt(CreateDomainStmt *from)
COPY_NODE_FIELD(domainname);
COPY_NODE_FIELD(typeName);
COPY_NODE_FIELD(collClause);
COPY_NODE_FIELD(constraints);
return newnode;

7
src/backend/nodes/equalfuncs.c
View File

@ -1007,7 +1007,6 @@ _equalAlterTableCmd(AlterTableCmd *a, AlterTableCmd *b)
COMPARE_SCALAR_FIELD(subtype);
COMPARE_STRING_FIELD(name);
COMPARE_NODE_FIELD(def);
COMPARE_NODE_FIELD(transform);
COMPARE_SCALAR_FIELD(behavior);
COMPARE_SCALAR_FIELD(missing_ok);
@ -1461,6 +1460,7 @@ _equalCreateDomainStmt(CreateDomainStmt *a, CreateDomainStmt *b)
{
COMPARE_NODE_FIELD(domainname);
COMPARE_NODE_FIELD(typeName);
COMPARE_NODE_FIELD(collClause);
COMPARE_NODE_FIELD(constraints);
return true;
@ -2130,8 +2130,6 @@ _equalTypeName(TypeName *a, TypeName *b)
COMPARE_NODE_FIELD(typmods);
COMPARE_SCALAR_FIELD(typemod);
COMPARE_NODE_FIELD(arrayBounds);
COMPARE_NODE_FIELD(collnames);
COMPARE_SCALAR_FIELD(collOid);
COMPARE_LOCATION_FIELD(location);
return true;
@ -2226,9 +2224,12 @@ _equalColumnDef(ColumnDef *a, ColumnDef *b)
COMPARE_SCALAR_FIELD(inhcount);
COMPARE_SCALAR_FIELD(is_local);
COMPARE_SCALAR_FIELD(is_not_null);
COMPARE_SCALAR_FIELD(is_from_type);
COMPARE_SCALAR_FIELD(storage);
COMPARE_NODE_FIELD(raw_default);
COMPARE_NODE_FIELD(cooked_default);
COMPARE_NODE_FIELD(collClause);
COMPARE_SCALAR_FIELD(collOid);
COMPARE_NODE_FIELD(constraints);
return true;

5
src/backend/nodes/makefuncs.c
View File

@ -427,16 +427,15 @@ makeTypeNameFromNameList(List *names)
/*
* makeTypeNameFromOid -
* build a TypeName node to represent a type already known by OID/typmod/collation.
* build a TypeName node to represent a type already known by OID/typmod.
*/
TypeName *
makeTypeNameFromOid(Oid typeOid, int32 typmod, Oid collOid)
makeTypeNameFromOid(Oid typeOid, int32 typmod)
{
TypeName *n = makeNode(TypeName);
n->typeOid = typeOid;
n->typemod = typmod;
n->collOid = collOid;
n->location = -1;
return n;
}

5
src/backend/nodes/outfuncs.c
View File

@ -2067,9 +2067,12 @@ _outColumnDef(StringInfo str, ColumnDef *node)
WRITE_INT_FIELD(inhcount);
WRITE_BOOL_FIELD(is_local);
WRITE_BOOL_FIELD(is_not_null);
WRITE_BOOL_FIELD(is_from_type);
WRITE_INT_FIELD(storage);
WRITE_NODE_FIELD(raw_default);
WRITE_NODE_FIELD(cooked_default);
WRITE_NODE_FIELD(collClause);
WRITE_OID_FIELD(collOid);
WRITE_NODE_FIELD(constraints);
}
@ -2085,8 +2088,6 @@ _outTypeName(StringInfo str, TypeName *node)
WRITE_NODE_FIELD(typmods);
WRITE_INT_FIELD(typemod);
WRITE_NODE_FIELD(arrayBounds);
WRITE_NODE_FIELD(collnames);
WRITE_OID_FIELD(collOid);
WRITE_LOCATION_FIELD(location);
}

182
src/backend/parser/gram.y
View File

@ -132,6 +132,9 @@ static Node *makeXmlExpr(XmlExprOp op, char *name, List *named_args,
static List *mergeTableFuncParameters(List *func_args, List *columns);
static TypeName *TableFuncTypeName(List *columns);
static RangeVar *makeRangeVarFromAnyName(List *names, int position, core_yyscan_t yyscanner);
static void SplitColQualList(List *qualList,
List **constraintList, CollateClause **collClause,
core_yyscan_t yyscanner);
%}
@ -221,7 +224,7 @@ static RangeVar *makeRangeVarFromAnyName(List *names, int position, core_yyscan_
%type <node> alter_column_default opclass_item opclass_drop alter_using
%type <ival> add_drop opt_asc_desc opt_nulls_order
%type <node> alter_table_cmd alter_type_cmd
%type <node> alter_table_cmd alter_type_cmd opt_collate_clause
%type <list> alter_table_cmds alter_type_cmds
%type <dbehavior> opt_drop_behavior
@ -400,8 +403,7 @@ static RangeVar *makeRangeVarFromAnyName(List *names, int position, core_yyscan_
%type <list> copy_generic_opt_list copy_generic_opt_arg_list
%type <list> copy_options
%type <typnam> Typename SimpleTypename SimpleTypenameWithoutCollation
ConstTypename
%type <typnam> Typename SimpleTypename ConstTypename
GenericType Numeric opt_float
Character ConstCharacter
CharacterWithLength CharacterWithoutLength
@ -619,6 +621,7 @@ static RangeVar *makeRangeVarFromAnyName(List *names, int position, core_yyscan_
%left '^'
/* Unary Operators */
%left AT ZONE /* sets precedence for AT TIME ZONE */
%left COLLATE
%right UMINUS
%left '[' ']'
%left '(' ')'
@ -1746,13 +1749,17 @@ alter_table_cmd:
* ALTER TABLE <name> ALTER [COLUMN] <colname> [SET DATA] TYPE <typename>
* [ USING <expression> ]
*/
| ALTER opt_column ColId opt_set_data TYPE_P Typename alter_using
| ALTER opt_column ColId opt_set_data TYPE_P Typename opt_collate_clause alter_using
{
AlterTableCmd *n = makeNode(AlterTableCmd);
ColumnDef *def = makeNode(ColumnDef);
n->subtype = AT_AlterColumnType;
n->name = $3;
n->def = (Node *) $6;
n->transform = $7;
n->def = (Node *) def;
/* We only use these three fields of the ColumnDef node */
def->typeName = $6;
def->collClause = (CollateClause *) $7;
def->raw_default = $8;
$$ = (Node *)n;
}
/* ALTER TABLE <name> ADD CONSTRAINT ... */
@ -1981,6 +1988,19 @@ opt_drop_behavior:
| /* EMPTY */ { $$ = DROP_RESTRICT; /* default */ }
;
opt_collate_clause:
COLLATE any_name
{
CollateClause *n = makeNode(CollateClause);
n->arg = NULL;
n->collnames = $2;
n->collOid = InvalidOid;
n->location = @1;
$$ = (Node *) n;
}
| /* EMPTY */ { $$ = NULL; }
;
alter_using:
USING a_expr { $$ = $2; }
| /* EMPTY */ { $$ = NULL; }
@ -2077,13 +2097,18 @@ alter_type_cmd:
$$ = (Node *)n;
}
/* ALTER TYPE <name> ALTER ATTRIBUTE <attname> [SET DATA] TYPE <typename> [RESTRICT|CASCADE] */
| ALTER ATTRIBUTE ColId opt_set_data TYPE_P Typename opt_drop_behavior
| ALTER ATTRIBUTE ColId opt_set_data TYPE_P Typename opt_collate_clause opt_drop_behavior
{
AlterTableCmd *n = makeNode(AlterTableCmd);
ColumnDef *def = makeNode(ColumnDef);
n->subtype = AT_AlterColumnType;
n->name = $3;
n->def = (Node *) $6;
n->behavior = $7;
n->def = (Node *) def;
n->behavior = $8;
/* We only use these three fields of the ColumnDef node */
def->typeName = $6;
def->collClause = (CollateClause *) $7;
def->raw_default = NULL;
$$ = (Node *)n;
}
;
@ -2454,8 +2479,16 @@ columnDef: ColId Typename ColQualList
ColumnDef *n = makeNode(ColumnDef);
n->colname = $1;
n->typeName = $2;
n->constraints = $3;
n->inhcount = 0;
n->is_local = true;
n->is_not_null = false;
n->is_from_type = false;
n->storage = 0;
n->raw_default = NULL;
n->cooked_default = NULL;
n->collOid = InvalidOid;
SplitColQualList($3, &n->constraints, &n->collClause,
yyscanner);
$$ = (Node *)n;
}
;
@ -2464,8 +2497,17 @@ columnOptions: ColId WITH OPTIONS ColQualList
{
ColumnDef *n = makeNode(ColumnDef);
n->colname = $1;
n->constraints = $4;
n->typeName = NULL;
n->inhcount = 0;
n->is_local = true;
n->is_not_null = false;
n->is_from_type = false;
n->storage = 0;
n->raw_default = NULL;
n->cooked_default = NULL;
n->collOid = InvalidOid;
SplitColQualList($4, &n->constraints, &n->collClause,
yyscanner);
$$ = (Node *)n;
}
;
@ -2486,6 +2528,20 @@ ColConstraint:
}
| ColConstraintElem { $$ = $1; }
| ConstraintAttr { $$ = $1; }
| COLLATE any_name
{
/*
* Note: the CollateClause is momentarily included in
* the list built by ColQualList, but we split it out
* again in SplitColQualList.
*/
CollateClause *n = makeNode(CollateClause);
n->arg = NULL;
n->collnames = $2;
n->collOid = InvalidOid;
n->location = @1;
$$ = (Node *) n;
}
;
/* DEFAULT NULL is already the default for Postgres.
@ -2973,8 +3029,12 @@ CreateAsElement:
n->inhcount = 0;
n->is_local = true;
n->is_not_null = false;
n->is_from_type = false;
n->storage = 0;
n->raw_default = NULL;
n->cooked_default = NULL;
n->collClause = NULL;
n->collOid = InvalidOid;
n->constraints = NIL;
$$ = (Node *)n;
}
@ -6577,7 +6637,7 @@ opt_column: COLUMN { $$ = COLUMN; }
| /*EMPTY*/ { $$ = 0; }
;
opt_set_data: SET DATA_P { $$ = 1; }
opt_set_data: SET DATA_P { $$ = 1; }
| /*EMPTY*/ { $$ = 0; }
;
@ -7443,7 +7503,8 @@ CreateDomainStmt:
CreateDomainStmt *n = makeNode(CreateDomainStmt);
n->domainname = $3;
n->typeName = $5;
n->constraints = $6;
SplitColQualList($6, &n->constraints, &n->collClause,
yyscanner);
$$ = (Node *)n;
}
;
@ -9084,13 +9145,21 @@ TableFuncElementList:
}
;
TableFuncElement: ColId Typename
TableFuncElement: ColId Typename opt_collate_clause
{
ColumnDef *n = makeNode(ColumnDef);
n->colname = $1;
n->typeName = $2;
n->constraints = NIL;
n->inhcount = 0;
n->is_local = true;
n->is_not_null = false;
n->is_from_type = false;
n->storage = 0;
n->raw_default = NULL;
n->cooked_default = NULL;
n->collClause = (CollateClause *) $3;
n->collOid = InvalidOid;
n->constraints = NIL;
$$ = (Node *)n;
}
;
@ -9151,13 +9220,6 @@ opt_array_bounds:
;
SimpleTypename:
SimpleTypenameWithoutCollation opt_collate
{
$$ = $1;
$$->collnames = $2;
}
SimpleTypenameWithoutCollation:
GenericType { $$ = $1; }
| Numeric { $$ = $1; }
| Bit { $$ = $1; }
@ -9625,6 +9687,14 @@ interval_second:
a_expr: c_expr { $$ = $1; }
| a_expr TYPECAST Typename
{ $$ = makeTypeCast($1, $3, @2); }
| a_expr COLLATE any_name
{
CollateClause *n = makeNode(CollateClause);
n->arg = (Expr *) $1;
n->collnames = $3;
n->location = @2;
$$ = (Node *) n;
}
| a_expr AT TIME ZONE a_expr
{
FuncCall *n = makeNode(FuncCall);
@ -10193,14 +10263,6 @@ c_expr: columnref { $$ = $1; }
r->location = @1;
$$ = (Node *)r;
}
| c_expr COLLATE any_name
{
CollateClause *n = makeNode(CollateClause);
n->arg = (Expr *) $1;
n->collnames = $3;
n->location = @2;
$$ = (Node *)n;
}
;
/*
@ -12678,15 +12740,6 @@ makeXmlExpr(XmlExprOp op, char *name, List *named_args, List *args,
return (Node *) x;
}
/* parser_init()
* Initialize to parse one query string
*/
void
parser_init(base_yy_extra_type *yyext)
{
yyext->parsetree = NIL; /* in case grammar forgets to set it */
}
/*
* Merge the input and output parameters of a table function.
*/
@ -12774,6 +12827,57 @@ makeRangeVarFromAnyName(List *names, int position, core_yyscan_t yyscanner)
return r;
}
/* Separate Constraint nodes from COLLATE clauses in a ColQualList */
static void
SplitColQualList(List *qualList,
List **constraintList, CollateClause **collClause,
core_yyscan_t yyscanner)
{
ListCell *cell;
ListCell *prev;
ListCell *next;
*collClause = NULL;
prev = NULL;
for (cell = list_head(qualList); cell; cell = next)
{
Node *n = (Node *) lfirst(cell);
next = lnext(cell);
if (IsA(n, Constraint))
{
/* keep it in list */
prev = cell;
continue;
}
if (IsA(n, CollateClause))
{
CollateClause *c = (CollateClause *) n;
if (*collClause)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("multiple COLLATE clauses not allowed"),
parser_errposition(c->location)));
*collClause = c;
}
else
elog(ERROR, "unexpected node type %d", (int) n->type);
/* remove non-Constraint nodes from qualList */
qualList = list_delete_cell(qualList, cell, prev);
}
*constraintList = qualList;
}
/* parser_init()
* Initialize to parse one query string
*/
void
parser_init(base_yy_extra_type *yyext)
{
yyext->parsetree = NIL; /* in case grammar forgets to set it */
}
/*
* Must undefine this stuff before including scan.c, since it has different
* definitions for these macros.

17
src/backend/parser/parse_expr.c
View File

@ -147,12 +147,6 @@ transformExpr(ParseState *pstate, Node *expr)
{
TypeCast *tc = (TypeCast *) expr;
if (tc->typeName->collnames)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("COLLATE clause not allowed in cast target"),
parser_errposition(pstate, tc->typeName->location)));
/*
* If the subject of the typecast is an ARRAY[] construct and
* the target type is an array type, we invoke
@ -2116,13 +2110,16 @@ transformCollateClause(ParseState *pstate, CollateClause *c)
newc->arg = (Expr *) transformExpr(pstate, (Node *) c->arg);
argtype = exprType((Node *) newc->arg);
/* The unknown type is not collatable, but coerce_type() takes
* care of it separately, so we'll let it go here. */
/*
* The unknown type is not collatable, but coerce_type() takes
* care of it separately, so we'll let it go here.
*/
if (!type_is_collatable(argtype) && argtype != UNKNOWNOID)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("collations are not supported by type %s",
format_type_be(argtype))));
format_type_be(argtype)),
parser_errposition(pstate, c->location)));
newc->collOid = LookupCollation(pstate, c->collnames, c->location);
newc->collnames = c->collnames;

4
src/backend/parser/parse_func.c
View File

@ -1313,7 +1313,7 @@ FuncNameAsType(List *funcname)
Oid result;
Type typtup;
typtup = LookupTypeName(NULL, makeTypeNameFromNameList(funcname), NULL, NULL);
typtup = LookupTypeName(NULL, makeTypeNameFromNameList(funcname), NULL);
if (typtup == NULL)
return InvalidOid;
@ -1500,7 +1500,7 @@ LookupTypeNameOid(const TypeName *typename)
Oid result;
Type typtup;
typtup = LookupTypeName(NULL, typename, NULL, NULL);
typtup = LookupTypeName(NULL, typename, NULL);
if (typtup == NULL)
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_OBJECT),

3
src/backend/parser/parse_relation.c
View File

@ -1169,7 +1169,8 @@ addRangeTableEntryForFunction(ParseState *pstate,
errmsg("column \"%s\" cannot be declared SETOF",
attrname),
parser_errposition(pstate, n->typeName->location)));
typenameTypeIdModColl(pstate, n->typeName, &attrtype, &attrtypmod, &attrcollation);
typenameTypeIdAndMod(pstate, n->typeName, &attrtype, &attrtypmod);
attrcollation = GetColumnDefCollation(pstate, n, attrtype);
eref->colnames = lappend(eref->colnames, makeString(attrname));
rte->funccoltypes = lappend_oid(rte->funccoltypes, attrtype);
rte->funccoltypmods = lappend_int(rte->funccoltypmods, attrtypmod);

166
src/backend/parser/parse_type.c
View File

@ -29,8 +29,6 @@
static int32 typenameTypeMod(ParseState *pstate, const TypeName *typeName,
Type typ);
static Oid typenameCollation(ParseState *pstate, const TypeName *typeName,
Type typ);
/*
@ -38,8 +36,7 @@ static Oid typenameCollation(ParseState *pstate, const TypeName *typeName,
* Given a TypeName object, lookup the pg_type syscache entry of the type.
* Returns NULL if no such type can be found. If the type is found,
* the typmod value represented in the TypeName struct is computed and
* stored into *typmod_p, and the collation is looked up and stored into
* *colloid_p.
* stored into *typmod_p.
*
* NB: on success, the caller must ReleaseSysCache the type tuple when done
* with it.
@ -54,18 +51,15 @@ static Oid typenameCollation(ParseState *pstate, const TypeName *typeName,
* found but is a shell, and there is typmod decoration, an error will be
* thrown --- this is intentional.
*
* colloid_p can also be null.
*
* pstate is only used for error location info, and may be NULL.
*/
Type
LookupTypeName(ParseState *pstate, const TypeName *typeName,
int32 *typmod_p, Oid *collid_p)
int32 *typmod_p)
{
Oid typoid;
HeapTuple tup;
int32 typmod;
Oid collid;
if (typeName->names == NIL)
{
@ -180,28 +174,22 @@ LookupTypeName(ParseState *pstate, const TypeName *typeName,
if (typmod_p)
*typmod_p = typmod;
collid = typenameCollation(pstate, typeName, (Type) tup);
if (collid_p)
*collid_p = collid;
return (Type) tup;
}
/*
* typenameType - given a TypeName, return a Type structure, typmod, and
* collation
* typenameType - given a TypeName, return a Type structure and typmod
*
* This is equivalent to LookupTypeName, except that this will report
* a suitable error message if the type cannot be found or is not defined.
* Callers of this can therefore assume the result is a fully valid type.
*/
Type
typenameType(ParseState *pstate, const TypeName *typeName, int32 *typmod_p, Oid *collid_p)
typenameType(ParseState *pstate, const TypeName *typeName, int32 *typmod_p)
{
Type tup;
tup = LookupTypeName(pstate, typeName, typmod_p, collid_p);
tup = LookupTypeName(pstate, typeName, typmod_p);
if (tup == NULL)
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_OBJECT),
@ -229,7 +217,7 @@ typenameTypeId(ParseState *pstate, const TypeName *typeName)
Oid typoid;
Type tup;
tup = typenameType(pstate, typeName, NULL, NULL);
tup = typenameType(pstate, typeName, NULL);
typoid = HeapTupleGetOid(tup);
ReleaseSysCache(tup);
@ -248,25 +236,7 @@ typenameTypeIdAndMod(ParseState *pstate, const TypeName *typeName,
{
Type tup;
tup = typenameType(pstate, typeName, typmod_p, NULL);
*typeid_p = HeapTupleGetOid(tup);
ReleaseSysCache(tup);
}
/*
* typenameTypeIdModColl - given a TypeName, return the type's OID,
* typmod, and collation
*
* This is equivalent to typenameType, but we only hand back the type OID,
* typmod, and collation, not the syscache entry.
*/
void
typenameTypeIdModColl(ParseState *pstate, const TypeName *typeName,
Oid *typeid_p, int32 *typmod_p, Oid *collid_p)
{
Type tup;
tup = typenameType(pstate, typeName, typmod_p, collid_p);
tup = typenameType(pstate, typeName, typmod_p);
*typeid_p = HeapTupleGetOid(tup);
ReleaseSysCache(tup);
}
@ -380,62 +350,6 @@ typenameTypeMod(ParseState *pstate, const TypeName *typeName, Type typ)
return result;
}
/*
* typenameCollation - given a TypeName, return the collation OID
*
* This will throw an error if the TypeName includes a collation but
* the data type does not support collations.
*
* The actual type OID represented by the TypeName must already have been
* looked up, and is passed as "typ".
*
* pstate is only used for error location info, and may be NULL.
*/
static Oid
typenameCollation(ParseState *pstate, const TypeName *typeName, Type typ)
{
Oid typcollation = ((Form_pg_type) GETSTRUCT(typ))->typcollation;
/* return prespecified collation OID if no collation name specified */
if (typeName->collnames == NIL)
{
if (typeName->collOid == InvalidOid)
return typcollation;
else
return typeName->collOid;
}
if (!OidIsValid(typcollation))
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("collations are not supported by type %s",
format_type_be(HeapTupleGetOid(typ))),
parser_errposition(pstate, typeName->location)));
return LookupCollation(pstate, typeName->collnames, typeName->location);
}
/*
* LookupCollation
*
* Look up collation by name, return OID, with support for error
* location.
*/
Oid
LookupCollation(ParseState *pstate, List *collnames, int location)
{
Oid colloid;
ParseCallbackState pcbstate;
setup_parser_errposition_callback(&pcbstate, pstate, location);
colloid = get_collation_oid(collnames, false);
cancel_parser_errposition_callback(&pcbstate);
return colloid;
}
/*
* appendTypeNameToBuffer
* Append a string representing the name of a TypeName to a StringInfo.
@ -516,6 +430,72 @@ TypeNameListToString(List *typenames)
return string.data;
}
/*
* LookupCollation
*
* Look up collation by name, return OID, with support for error location.
*/
Oid
LookupCollation(ParseState *pstate, List *collnames, int location)
{
Oid colloid;
ParseCallbackState pcbstate;
if (pstate)
setup_parser_errposition_callback(&pcbstate, pstate, location);
colloid = get_collation_oid(collnames, false);
if (pstate)
cancel_parser_errposition_callback(&pcbstate);
return colloid;
}
/*
* GetColumnDefCollation
*
* Get the collation to be used for a column being defined, given the
* ColumnDef node and the previously-determined column type OID.
*
* pstate is only used for error location purposes, and can be NULL.
*/
Oid
GetColumnDefCollation(ParseState *pstate, ColumnDef *coldef, Oid typeOid)
{
Oid result;
Oid typcollation = get_typcollation(typeOid);
int location = -1;
if (coldef->collClause)
{
/* We have a raw COLLATE clause, so look up the collation */
location = coldef->collClause->location;
result = LookupCollation(pstate, coldef->collClause->collnames,
location);
}
else if (OidIsValid(coldef->collOid))
{
/* Precooked collation spec, use that */
result = coldef->collOid;
}
else
{
/* Use the type's default collation if any */
result = typcollation;
}
/* Complain if COLLATE is applied to an uncollatable type */
if (OidIsValid(result) && !OidIsValid(typcollation))
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("collations are not supported by type %s",
format_type_be(typeOid)),
parser_errposition(pstate, location)));
return result;
}
/* return a Type structure, given a type id */
/* NB: caller must ReleaseSysCache the type tuple when done with it */
Type

46
src/backend/parser/parse_utilcmd.c
View File

@ -627,13 +627,16 @@ transformInhRelation(CreateStmtContext *cxt, InhRelation *inhRelation)
def = makeNode(ColumnDef);
def->colname = pstrdup(attributeName);
def->typeName = makeTypeNameFromOid(attribute->atttypid,
attribute->atttypmod,
attribute->attcollation);
attribute->atttypmod);
def->inhcount = 0;
def->is_local = true;
def->is_not_null = attribute->attnotnull;
def->is_from_type = false;
def->storage = 0;
def->raw_default = NULL;
def->cooked_default = NULL;
def->collClause = NULL;
def->collOid = attribute->attcollation;
def->constraints = NIL;
/*
@ -822,7 +825,7 @@ transformOfType(CreateStmtContext *cxt, TypeName *ofTypename)
AssertArg(ofTypename);
tuple = typenameType(NULL, ofTypename, NULL, NULL);
tuple = typenameType(NULL, ofTypename, NULL);
typ = (Form_pg_type) GETSTRUCT(tuple);
ofTypeId = HeapTupleGetOid(tuple);
ofTypename->typeOid = ofTypeId; /* cached for later */
@ -837,16 +840,24 @@ transformOfType(CreateStmtContext *cxt, TypeName *ofTypename)
for (i = 0; i < tupdesc->natts; i++)
{
Form_pg_attribute attr = tupdesc->attrs[i];
ColumnDef *n = makeNode(ColumnDef);
ColumnDef *n;
if (attr->attisdropped)
continue;
n = makeNode(ColumnDef);
n->colname = pstrdup(NameStr(attr->attname));
n->typeName = makeTypeNameFromOid(attr->atttypid, attr->atttypmod, attr->attcollation);
n->constraints = NULL;
n->typeName = makeTypeNameFromOid(attr->atttypid, attr->atttypmod);
n->inhcount = 0;
n->is_local = true;
n->is_not_null = false;
n->is_from_type = true;
n->storage = 0;
n->raw_default = NULL;
n->cooked_default = NULL;
n->collClause = NULL;
n->collOid = attr->attcollation;
n->constraints = NIL;
cxt->columns = lappend(cxt->columns, n);
}
DecrTupleDescRefCount(tupdesc);
@ -2445,9 +2456,28 @@ static void
transformColumnType(CreateStmtContext *cxt, ColumnDef *column)
{
/*
* All we really need to do here is verify that the type is valid.
* All we really need to do here is verify that the type is valid,
* including any collation spec that might be present.
*/
Type ctype = typenameType(cxt->pstate, column->typeName, NULL, NULL);
Type ctype = typenameType(cxt->pstate, column->typeName, NULL);
if (column->collClause)
{
Form_pg_type typtup = (Form_pg_type) GETSTRUCT(ctype);
Oid collOid;
collOid = LookupCollation(cxt->pstate,
column->collClause->collnames,
column->collClause->location);
/* Complain if COLLATE is applied to an uncollatable type */
if (!OidIsValid(typtup->typcollation))
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("collations are not supported by type %s",
format_type_be(HeapTupleGetOid(ctype))),
parser_errposition(cxt->pstate,
column->collClause->location)));
}
ReleaseSysCache(ctype);
}

5
src/backend/utils/adt/ruleutils.c
View File

@ -5082,8 +5082,9 @@ get_rule_expr(Node *node, deparse_context *context,
if (!PRETTY_PAREN(context))
appendStringInfoChar(buf, '(');
get_rule_expr_paren(arg, context, false, node);
appendStringInfo(buf, " COLLATE %s", generate_collation_name(collate->collOid));
get_rule_expr_paren(arg, context, showimplicit, node);
appendStringInfo(buf, " COLLATE %s",
generate_collation_name(collate->collOid));
if (!PRETTY_PAREN(context))
appendStringInfoChar(buf, ')');
}

2
src/include/nodes/makefuncs.h
View File

@ -68,7 +68,7 @@ extern RangeVar *makeRangeVar(char *schemaname, char *relname, int location);
extern TypeName *makeTypeName(char *typnam);
extern TypeName *makeTypeNameFromNameList(List *names);
extern TypeName *makeTypeNameFromOid(Oid typeOid, int32 typmod, Oid collOid);
extern TypeName *makeTypeNameFromOid(Oid typeOid, int32 typmod);
extern FuncExpr *makeFuncExpr(Oid funcid, Oid rettype,
List *args, Oid collid, CoercionForm fformat);

17
src/include/nodes/parsenodes.h
View File

@ -168,8 +168,7 @@ typedef struct Query
* specify the type by OID than by name. If "names" is NIL then the
* actual type OID is given by typeOid, otherwise typeOid is unused.
* Similarly, if "typmods" is NIL then the actual typmod is expected to
* be prespecified in typemod, otherwise typemod is unused. Similarly
* for collnames/collOid.
* be prespecified in typemod, otherwise typemod is unused.
*
* If pct_type is TRUE, then names is actually a field name and we look up
* the type of that field. Otherwise (the normal case), names is a type
@ -185,8 +184,6 @@ typedef struct TypeName
List *typmods; /* type modifier expression(s) */
int32 typemod; /* prespecified type modifier */
List *arrayBounds; /* array bounds */
List *collnames; /* collation name */
Oid collOid; /* collation by OID */
int location; /* token location, or -1 if unknown */
} TypeName;
@ -468,6 +465,10 @@ typedef struct RangeFunction
* how this ColumnDef node was created (by parsing, or by inheritance
* from an existing relation). We should never have both in the same node!
*
* Similarly, we may have a COLLATE specification in either raw form
* (represented as a CollateClause with arg==NULL) or cooked form
* (the collation's OID).
*
* The constraints list may contain a CONSTR_DEFAULT item in a raw
* parsetree produced by gram.y, but transformCreateStmt will remove
* the item and set raw_default instead. CONSTR_DEFAULT items
@ -485,6 +486,8 @@ typedef struct ColumnDef
char storage; /* attstorage setting, or 0 for default */
Node *raw_default; /* default value (untransformed parse tree) */
Node *cooked_default; /* default value (transformed expr tree) */
CollateClause *collClause; /* untransformed COLLATE spec, if any */
Oid collOid; /* collation OID (InvalidOid if not set) */
List *constraints; /* other constraints on column */
} ColumnDef;
@ -1202,9 +1205,8 @@ typedef struct AlterTableCmd /* one subcommand of an ALTER TABLE */
AlterTableType subtype; /* Type of table alteration to apply */
char *name; /* column, constraint, or trigger to act on,
* or new owner or tablespace */
Node *def; /* definition of new column, column type,
* index, constraint, or parent table */
Node *transform; /* transformation expr for ALTER TYPE */
Node *def; /* definition of new column, index,
* constraint, or parent table */
DropBehavior behavior; /* RESTRICT or CASCADE for DROP cases */
bool missing_ok; /* skip error if missing? */
bool validated;
@ -1819,6 +1821,7 @@ typedef struct CreateDomainStmt
NodeTag type;
List *domainname; /* qualified name (list of Value strings) */
TypeName *typeName; /* the base type */
CollateClause *collClause; /* untransformed COLLATE spec, if any */
List *constraints; /* constraints (list of Constraint nodes) */
} CreateDomainStmt;

14
src/include/parser/parse_type.h
View File

@ -20,21 +20,19 @@
typedef HeapTuple Type;
extern Type LookupTypeName(ParseState *pstate, const TypeName *typeName,
int32 *typmod_p, Oid *collid_p);
int32 *typmod_p);
extern Type typenameType(ParseState *pstate, const TypeName *typeName,
int32 *typmod_p, Oid *collid_p);
extern Oid LookupCollation(ParseState *pstate, List *collnames, int location);
int32 *typmod_p);
extern Oid typenameTypeId(ParseState *pstate, const TypeName *typeName);
extern void typenameTypeIdAndMod(ParseState *pstate, const TypeName *typeName,
Oid *typeid_p, int32 *typmod_p);
extern void typenameTypeIdModColl(ParseState *pstate, const TypeName *typeName,
Oid *typeid_p, int32 *typmod_p, Oid *collid_p);
Oid *typeid_p, int32 *typmod_p);
extern char *TypeNameToString(const TypeName *typeName);
extern char *TypeNameListToString(List *typenames);
extern Oid LookupCollation(ParseState *pstate, List *collnames, int location);
extern Oid GetColumnDefCollation(ParseState *pstate, ColumnDef *coldef, Oid typeOid);
extern Type typeidType(Oid id);
extern Oid typeTypeId(Type tp);

2
src/pl/plpgsql/src/pl_comp.c
View File

@ -1565,7 +1565,7 @@ plpgsql_parse_wordtype(char *ident)
* Word wasn't found in the namespace stack. Try to find a data type with
* that name, but ignore shell types and complex types.
*/
typeTup = LookupTypeName(NULL, makeTypeName(ident), NULL, NULL);
typeTup = LookupTypeName(NULL, makeTypeName(ident), NULL);
if (typeTup)
{
Form_pg_type typeStruct = (Form_pg_type) GETSTRUCT(typeTup);

12
src/test/regress/expected/collate.linux.utf8.out
View File

@ -20,21 +20,21 @@ CREATE TABLE collate_test_fail (
);
ERROR: collation "ja_JP.eucjp" for current database encoding "UTF8" does not exist
LINE 3: b text COLLATE "ja_JP.eucjp"
^
^
CREATE TABLE collate_test_fail (
a int,
b text COLLATE "foo"
);
ERROR: collation "foo" for current database encoding "UTF8" does not exist
LINE 3: b text COLLATE "foo"
^
^
CREATE TABLE collate_test_fail (
a int COLLATE "en_US.utf8",
b text
);
ERROR: collations are not supported by type integer
LINE 2: a int COLLATE "en_US.utf8",
^
^
CREATE TABLE collate_test_like (
LIKE collate_test1
);
@ -632,9 +632,9 @@ ERROR: no collation was derived for column "b" with collatable type text
HINT: Use the COLLATE clause to set the collation explicitly.
-- casting
SELECT CAST('42' AS text COLLATE "C");
ERROR: COLLATE clause not allowed in cast target
ERROR: syntax error at or near "COLLATE"
LINE 1: SELECT CAST('42' AS text COLLATE "C");
^
^
SELECT a, CAST(b AS varchar) FROM collate_test1 ORDER BY 2;
a | b
---+-----
@ -727,6 +727,8 @@ CREATE INDEX collate_test1_idx4 ON collate_test1 (a COLLATE "C"); -- fail
ERROR: collations are not supported by type integer
CREATE INDEX collate_test1_idx5 ON collate_test1 ((a COLLATE "C")); -- fail
ERROR: collations are not supported by type integer
LINE 1: ...ATE INDEX collate_test1_idx5 ON collate_test1 ((a COLLATE "C...
^
SELECT relname, pg_get_indexdef(oid) FROM pg_class WHERE relname LIKE 'collate_test%_idx%';
relname | pg_get_indexdef
--------------------+----------------------------------------------------------------------------------------------

2
src/test/regress/expected/foreign_data.out
View File

@ -693,7 +693,7 @@ ERROR: "ft1" is not a table or view
ALTER FOREIGN TABLE ft1 ALTER COLUMN c6 SET NOT NULL;
ALTER FOREIGN TABLE ft1 ALTER COLUMN c7 DROP NOT NULL;
ALTER FOREIGN TABLE ft1 ALTER COLUMN c8 TYPE char(10) using '0'; -- ERROR
ERROR: ALTER TYPE USING is not supported on foreign tables
ERROR: ALTER TYPE USING is only supported on plain tables
ALTER FOREIGN TABLE ft1 ALTER COLUMN c8 TYPE char(10);
ALTER FOREIGN TABLE ft1 ALTER COLUMN c8 SET DATA TYPE text;
-- can't change the column type if it's used elsewhere