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Add ALTER TYPE ... ADD/DROP/ALTER/RENAME ATTRIBUTE

Browse Source 
Like with tables, this also requires allowing the existence of
composite types with zero attributes.

reviewed by KaiGai Kohei
This commit is contained in:
Peter Eisentraut 2010-09-26 14:41:03 +03:00
parent 899beb7894
commit e440e12c56
15 changed files with 636 additions and 148 deletions
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130
doc/src/sgml/ref/alter_type.sgml
View File

@ -23,9 +23,17 @@ PostgreSQL documentation
<refsynopsisdiv>
<synopsis>
ALTER TYPE <replaceable class="PARAMETER">name</replaceable> RENAME TO <replaceable class="PARAMETER">new_name</replaceable>
ALTER TYPE <replaceable class="PARAMETER">name</replaceable> <replaceable class="PARAMETER">action</replaceable> [, ... ]
ALTER TYPE <replaceable class="PARAMETER">name</replaceable> OWNER TO <replaceable class="PARAMETER">new_owner</replaceable>
ALTER TYPE <replaceable class="PARAMETER">name</replaceable> RENAME ATTRIBUTE <replaceable class="PARAMETER">attribute_name</replaceable> TO <replaceable class="PARAMETER">new_attribute_name</replaceable>
ALTER TYPE <replaceable class="PARAMETER">name</replaceable> RENAME TO <replaceable class="PARAMETER">new_name</replaceable>
ALTER TYPE <replaceable class="PARAMETER">name</replaceable> SET SCHEMA <replaceable class="PARAMETER">new_schema</replaceable>
<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>
DROP ATTRIBUTE [ IF EXISTS ] <replaceable class="PARAMETER">attribute_name</replaceable>
ALTER ATTRIBUTE <replaceable class="PARAMETER">attribute_name</replaceable> [ SET DATA ] TYPE <replaceable class="PARAMETER">data_type</replaceable>
</synopsis>
</refsynopsisdiv>
@ -34,6 +42,76 @@ ALTER TYPE <replaceable class="PARAMETER">name</replaceable> SET SCHEMA <replace
<para>
<command>ALTER TYPE</command> changes the definition of an existing type.
There are several subforms:
<variablelist>
<varlistentry>
<term><literal>ADD ATTRIBUTE</literal></term>
<listitem>
<para>
This form adds a new attribute to a composite type, using the same syntax as
<xref linkend="SQL-CREATETYPE">.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>DROP ATTRIBUTE [ IF EXISTS ]</literal></term>
<listitem>
<para>
This form drops an attribute from a composite type.
If <literal>IF EXISTS</literal> is specified and the attribute
does not exist, no error is thrown. In this case a notice
is issued instead.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>SET DATA TYPE</literal></term>
<listitem>
<para>
This form changes the type of an attribute of a composite type.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>OWNER</literal></term>
<listitem>
<para>
This form changes the owner of the type.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>RENAME</literal></term>
<listitem>
<para>
This form changes the name of the type or the name of an
individual attribute of a composite type.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>SET SCHEMA</literal></term>
<listitem>
<para>
This form moves the type into another schema.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
<para>
The <literal>ADD ATTRIBUTE</literal>, <literal>DROP
ATTRIBUTE</literal>, and <literal>ALTER ATTRIBUTE</literal> actions
can be combined into a list of multiple alterations to apply in
parallel. For example, it is possible to add several attributes
and/or alter the type of several attributes in a single command.
</para>
<para>
@ -90,6 +168,34 @@ ALTER TYPE <replaceable class="PARAMETER">name</replaceable> SET SCHEMA <replace
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="PARAMETER">attribute_name</replaceable></term>
<listitem>
<para>
The name of the attribute to add, alter, or drop.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="PARAMETER">new_attribute_name</replaceable></term>
<listitem>
<para>
The new name of the attribute begin renamed.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="PARAMETER">data_type</replaceable></term>
<listitem>
<para>
The data type of the attribute to add, or the new type of the
attribute to alter.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
@ -117,16 +223,32 @@ ALTER TYPE email OWNER TO joe;
to <literal>customers</literal>:
<programlisting>
ALTER TYPE email SET SCHEMA customers;
</programlisting>
</para>
<para>
To add a new attribute to a type:
<programlisting>
ALTER TYPE compfoo ADD ATTRIBUTE f3 int;
</programlisting>
</para>
</refsect1>
<refsect1>
<title>Compatibility</title>
<para>
There is no <command>ALTER TYPE</command> statement in the SQL
standard.
The variants to add and drop attributes are part of the SQL
standard; the other variants are PostgreSQL extensions.
</para>
</refsect1>
<refsect1 id="SQL-ALTERTYPE-see-also">
<title>See Also</title>
<simplelist type="inline">
<member><xref linkend="sql-createtype"></member>
<member><xref linkend="sql-droptype"></member>
</simplelist>
</refsect1>
</refentry>

22
doc/src/sgml/ref/create_type.sgml
View File

@ -22,7 +22,7 @@ PostgreSQL documentation
<refsynopsisdiv>
<synopsis>
CREATE TYPE <replaceable class="parameter">name</replaceable> AS
( <replaceable class="PARAMETER">attribute_name</replaceable> <replaceable class="PARAMETER">data_type</replaceable> [, ... ] )
( [ <replaceable class="PARAMETER">attribute_name</replaceable> <replaceable class="PARAMETER">data_type</replaceable> [, ... ] ] )
CREATE TYPE <replaceable class="parameter">name</replaceable> AS ENUM
( [ '<replaceable class="parameter">label</replaceable>' [, ... ] ] )
@ -768,10 +768,18 @@ CREATE TABLE big_objs (
<title>Compatibility</title>
<para>
This <command>CREATE TYPE</command> command is a
<productname>PostgreSQL</productname> extension. There is a
<command>CREATE TYPE</command> statement in the <acronym>SQL</> standard
that is rather different in detail.
The first form of the <command>CREATE TYPE</command> command, which
creates a composite type, conforms to the <acronym>SQL</> standard.
The other forms are <productname>PostgreSQL</productname>
extensions. The <command>CREATE TYPE</command> statement in
the <acronym>SQL</> standard also defines other forms that are not
implemented in <productname>PostgreSQL</>.
</para>
<para>
The ability to create a composite type with zero attributes is
a <productname>PostgreSQL</productname>-specific deviation from the
standard (analogous to <command>CREATE TABLE</command>).
</para>
</refsect1>
@ -779,10 +787,10 @@ CREATE TABLE big_objs (
<title>See Also</title>
<simplelist type="inline">
<member><xref linkend="sql-createfunction"></member>
<member><xref linkend="sql-droptype"></member>
<member><xref linkend="sql-altertype"></member>
<member><xref linkend="sql-createdomain"></member>
<member><xref linkend="sql-createfunction"></member>
<member><xref linkend="sql-droptype"></member>
</simplelist>
</refsect1>

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

@ -97,7 +97,7 @@ DROP TYPE box;
This command is similar to the corresponding command in the SQL
standard, apart from the <literal>IF EXISTS</>
option, which is a <productname>PostgreSQL</> extension.
But note that the <command>CREATE TYPE</command> command
But note that much of the <command>CREATE TYPE</command> command
and the data type extension mechanisms in
<productname>PostgreSQL</productname> differ from the SQL standard.
</para>
@ -107,8 +107,8 @@ DROP TYPE box;
<title>See Also</title>
<simplelist type="inline">
<member><xref linkend="sql-createtype"></member>
<member><xref linkend="sql-altertype"></member>
<member><xref linkend="sql-createtype"></member>
</simplelist>
</refsect1>

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

@ -89,6 +89,7 @@ ExecRenameStmt(RenameStmt *stmt)
case OBJECT_VIEW:
case OBJECT_INDEX:
case OBJECT_COLUMN:
case OBJECT_ATTRIBUTE:
case OBJECT_TRIGGER:
{
Oid relid;
@ -123,6 +124,7 @@ ExecRenameStmt(RenameStmt *stmt)
break;
}
case OBJECT_COLUMN:
case OBJECT_ATTRIBUTE:
renameatt(relid,
stmt->subname, /* old att name */
stmt->newname, /* new att name */

257
src/backend/commands/tablecmds.c
View File

@ -263,12 +263,13 @@ static void ATExecCmd(List **wqueue, AlteredTableInfo *tab, Relation rel,
static void ATRewriteTables(List **wqueue, LOCKMODE lockmode);
static void ATRewriteTable(AlteredTableInfo *tab, Oid OIDNewHeap, LOCKMODE lockmode);
static AlteredTableInfo *ATGetQueueEntry(List **wqueue, Relation rel);
static void ATSimplePermissions(Relation rel, bool allowView);
static void ATSimplePermissions(Relation rel, bool allowView, bool allowType);
static void ATSimplePermissionsRelationOrIndex(Relation rel);
static void ATSimpleRecursion(List **wqueue, Relation rel,
AlterTableCmd *cmd, bool recurse, LOCKMODE lockmode);
static void ATOneLevelRecursion(List **wqueue, Relation rel,
AlterTableCmd *cmd, LOCKMODE lockmode);
static void find_typed_table_dependencies(Oid typeOid, const char *typeName);
static void ATPrepAddColumn(List **wqueue, Relation rel, bool recurse,
AlterTableCmd *cmd, LOCKMODE lockmode);
static void ATExecAddColumn(AlteredTableInfo *tab, Relation rel,
@ -1978,6 +1979,10 @@ renameatt(Oid myrelid,
(errcode(ERRCODE_WRONG_OBJECT_TYPE),
errmsg("cannot rename column of typed table")));
if (targetrelation->rd_rel->relkind == RELKIND_COMPOSITE_TYPE)
find_typed_table_dependencies(targetrelation->rd_rel->reltype,
RelationGetRelationName(targetrelation));
/*
* Renaming the columns of sequences or toast tables doesn't actually
* break anything from the system's point of view, since internal
@ -2368,8 +2373,13 @@ AlterTable(AlterTableStmt *stmt)
/*
* For mostly-historical reasons, we allow ALTER TABLE to apply to
* all relation types.
* almost all relation types.
*/
if (rel->rd_rel->relkind == RELKIND_COMPOSITE_TYPE)
ereport(ERROR,
(errcode(ERRCODE_WRONG_OBJECT_TYPE),
errmsg("\"%s\" is not a table",
RelationGetRelationName(rel))));
break;
case OBJECT_INDEX:
@ -2388,6 +2398,14 @@ AlterTable(AlterTableStmt *stmt)
RelationGetRelationName(rel))));
break;
case OBJECT_TYPE:
if (rel->rd_rel->relkind != RELKIND_COMPOSITE_TYPE)
ereport(ERROR,
(errcode(ERRCODE_WRONG_OBJECT_TYPE),
errmsg("\"%s\" is not a composite type",
RelationGetRelationName(rel))));
break;
case OBJECT_VIEW:
if (rel->rd_rel->relkind != RELKIND_VIEW)
ereport(ERROR,
@ -2639,14 +2657,14 @@ ATPrepCmd(List **wqueue, Relation rel, AlterTableCmd *cmd,
switch (cmd->subtype)
{
case AT_AddColumn: /* ADD COLUMN */
ATSimplePermissions(rel, false);
ATSimplePermissions(rel, false, true);
/* Performs own recursion */
ATPrepAddColumn(wqueue, rel, recurse, cmd, lockmode);
pass = AT_PASS_ADD_COL;
break;
case AT_AddColumnToView: /* add column via CREATE OR REPLACE
* VIEW */
ATSimplePermissions(rel, true);
ATSimplePermissions(rel, true, false);
/* Performs own recursion */
ATPrepAddColumn(wqueue, rel, recurse, cmd, lockmode);
pass = AT_PASS_ADD_COL;
@ -2659,19 +2677,19 @@ ATPrepCmd(List **wqueue, Relation rel, AlterTableCmd *cmd,
* substitutes default values into INSERTs before it expands
* rules.
*/
ATSimplePermissions(rel, true);
ATSimplePermissions(rel, true, false);
ATSimpleRecursion(wqueue, rel, cmd, recurse, lockmode);
/* No command-specific prep needed */
pass = cmd->def ? AT_PASS_ADD_CONSTR : AT_PASS_DROP;
break;
case AT_DropNotNull: /* ALTER COLUMN DROP NOT NULL */
ATSimplePermissions(rel, false);
ATSimplePermissions(rel, false, false);
ATSimpleRecursion(wqueue, rel, cmd, recurse, lockmode);
/* No command-specific prep needed */
pass = AT_PASS_DROP;
break;
case AT_SetNotNull: /* ALTER COLUMN SET NOT NULL */
ATSimplePermissions(rel, false);
ATSimplePermissions(rel, false, false);
ATSimpleRecursion(wqueue, rel, cmd, recurse, lockmode);
/* No command-specific prep needed */
pass = AT_PASS_ADD_CONSTR;
@ -2689,25 +2707,25 @@ ATPrepCmd(List **wqueue, Relation rel, AlterTableCmd *cmd,
pass = AT_PASS_MISC;
break;
case AT_SetStorage: /* ALTER COLUMN SET STORAGE */
ATSimplePermissions(rel, false);
ATSimplePermissions(rel, false, false);
ATSimpleRecursion(wqueue, rel, cmd, recurse, lockmode);
/* No command-specific prep needed */
pass = AT_PASS_MISC;
break;
case AT_DropColumn: /* DROP COLUMN */
ATSimplePermissions(rel, false);
ATSimplePermissions(rel, false, true);
ATPrepDropColumn(rel, recurse, cmd);
/* Recursion occurs during execution phase */
pass = AT_PASS_DROP;
break;
case AT_AddIndex: /* ADD INDEX */
ATSimplePermissions(rel, false);
ATSimplePermissions(rel, false, false);
/* This command never recurses */
/* No command-specific prep needed */
pass = AT_PASS_ADD_INDEX;
break;
case AT_AddConstraint: /* ADD CONSTRAINT */
ATSimplePermissions(rel, false);
ATSimplePermissions(rel, false, false);
/* Recursion occurs during execution phase */
/* No command-specific prep needed except saving recurse flag */
if (recurse)
@ -2715,7 +2733,7 @@ ATPrepCmd(List **wqueue, Relation rel, AlterTableCmd *cmd,
pass = AT_PASS_ADD_CONSTR;
break;
case AT_DropConstraint: /* DROP CONSTRAINT */
ATSimplePermissions(rel, false);
ATSimplePermissions(rel, false, false);
/* Recursion occurs during execution phase */
/* No command-specific prep needed except saving recurse flag */
if (recurse)
@ -2723,7 +2741,7 @@ ATPrepCmd(List **wqueue, Relation rel, AlterTableCmd *cmd,
pass = AT_PASS_DROP;
break;
case AT_AlterColumnType: /* ALTER COLUMN TYPE */
ATSimplePermissions(rel, false);
ATSimplePermissions(rel, false, true);
/* Performs own recursion */
ATPrepAlterColumnType(wqueue, tab, rel, recurse, recursing, cmd, lockmode);
pass = AT_PASS_ALTER_TYPE;
@ -2735,20 +2753,20 @@ ATPrepCmd(List **wqueue, Relation rel, AlterTableCmd *cmd,
break;
case AT_ClusterOn: /* CLUSTER ON */
case AT_DropCluster: /* SET WITHOUT CLUSTER */
ATSimplePermissions(rel, false);
ATSimplePermissions(rel, false, false);
/* These commands never recurse */
/* No command-specific prep needed */
pass = AT_PASS_MISC;
break;
case AT_AddOids: /* SET WITH OIDS */
ATSimplePermissions(rel, false);
ATSimplePermissions(rel, false, false);
/* Performs own recursion */
if (!rel->rd_rel->relhasoids || recursing)
ATPrepAddOids(wqueue, rel, recurse, cmd, lockmode);
pass = AT_PASS_ADD_COL;
break;
case AT_DropOids: /* SET WITHOUT OIDS */
ATSimplePermissions(rel, false);
ATSimplePermissions(rel, false, false);
/* Performs own recursion */
if (rel->rd_rel->relhasoids)
{
@ -2775,7 +2793,7 @@ ATPrepCmd(List **wqueue, Relation rel, AlterTableCmd *cmd,
pass = AT_PASS_MISC;
break;
case AT_AddInherit: /* INHERIT */
ATSimplePermissions(rel, false);
ATSimplePermissions(rel, false, false);
/* This command never recurses */
ATPrepAddInherit(rel);
pass = AT_PASS_MISC;
@ -2793,7 +2811,7 @@ ATPrepCmd(List **wqueue, Relation rel, AlterTableCmd *cmd,
case AT_EnableReplicaRule:
case AT_DisableRule:
case AT_DropInherit: /* NO INHERIT */
ATSimplePermissions(rel, false);
ATSimplePermissions(rel, false, false);
/* These commands never recurse */
/* No command-specific prep needed */
pass = AT_PASS_MISC;
@ -3519,7 +3537,7 @@ ATGetQueueEntry(List **wqueue, Relation rel)
* - Ensure that it is not a system table
*/
static void
ATSimplePermissions(Relation rel, bool allowView)
ATSimplePermissions(Relation rel, bool allowView, bool allowType)
{
if (rel->rd_rel->relkind != RELKIND_RELATION)
{
@ -3531,6 +3549,14 @@ ATSimplePermissions(Relation rel, bool allowView)
errmsg("\"%s\" is not a table or view",
RelationGetRelationName(rel))));
}
else if (allowType)
{
if (rel->rd_rel->relkind != RELKIND_COMPOSITE_TYPE)
ereport(ERROR,
(errcode(ERRCODE_WRONG_OBJECT_TYPE),
errmsg("\"%s\" is not a table or composite type",
RelationGetRelationName(rel))));
}
else
ereport(ERROR,
(errcode(ERRCODE_WRONG_OBJECT_TYPE),
@ -3758,6 +3784,44 @@ find_composite_type_dependencies(Oid typeOid,
}
/*
* find_typed_table_dependencies
*
* Check to see if a composite type is being used as the type of a
* typed table. Eventually, we'd like to propagate the alter
* operation into such tables, but for now, just error out if we find
* any.
*/
static void
find_typed_table_dependencies(Oid typeOid, const char *typeName)
{
Relation classRel;
ScanKeyData key[1];
HeapScanDesc scan;
HeapTuple tuple;
classRel = heap_open(RelationRelationId, AccessShareLock);
ScanKeyInit(&key[0],
Anum_pg_class_reloftype,
BTEqualStrategyNumber, F_OIDEQ,
ObjectIdGetDatum(typeOid));
scan = heap_beginscan(classRel, SnapshotNow, 1, key);
if (HeapTupleIsValid(tuple = heap_getnext(scan, ForwardScanDirection)))
{
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("cannot alter type \"%s\" because it is the type of a typed table",
typeName)));
}
heap_endscan(scan);
heap_close(classRel, AccessShareLock);
}
/*
* ALTER TABLE ADD COLUMN
*
@ -3804,6 +3868,10 @@ ATPrepAddColumn(List **wqueue, Relation rel, bool recurse,
(errcode(ERRCODE_INVALID_TABLE_DEFINITION),
errmsg("column must be added to child tables too")));
}
if (rel->rd_rel->relkind == RELKIND_COMPOSITE_TYPE)
find_typed_table_dependencies(rel->rd_rel->reltype,
RelationGetRelationName(rel));
}
static void
@ -4007,7 +4075,7 @@ ATExecAddColumn(AlteredTableInfo *tab, Relation rel,
* defaults, not even for domain-typed columns. And in any case we
* mustn't invoke Phase 3 on a view, since it has no storage.
*/
if (relkind != RELKIND_VIEW && attribute.attnum > 0)
if (relkind != RELKIND_VIEW && relkind != RELKIND_COMPOSITE_TYPE && attribute.attnum > 0)
{
defval = (Expr *) build_column_default(rel, attribute.attnum);
@ -4535,6 +4603,10 @@ ATPrepDropColumn(Relation rel, bool recurse, AlterTableCmd *cmd)
(errcode(ERRCODE_WRONG_OBJECT_TYPE),
errmsg("cannot drop column from typed table")));
if (rel->rd_rel->relkind == RELKIND_COMPOSITE_TYPE)
find_typed_table_dependencies(rel->rd_rel->reltype,
RelationGetRelationName(rel));
/* No command-specific prep needed except saving recurse flag */
if (recurse)
cmd->subtype = AT_DropColumnRecurse;
@ -4554,7 +4626,7 @@ ATExecDropColumn(List **wqueue, Relation rel, const char *colName,
/* At top level, permission check was done in ATPrepCmd, else do it */
if (recursing)
ATSimplePermissions(rel, false);
ATSimplePermissions(rel, false, true);
/*
* get the number of the attribute
@ -4858,7 +4930,7 @@ ATAddCheckConstraint(List **wqueue, AlteredTableInfo *tab, Relation rel,
/* At top level, permission check was done in ATPrepCmd, else do it */
if (recursing)
ATSimplePermissions(rel, false);
ATSimplePermissions(rel, false, false);
/*
* Call AddRelationNewConstraints to do the work, making sure it works on
@ -5801,7 +5873,7 @@ ATExecDropConstraint(Relation rel, const char *constrName,
/* At top level, permission check was done in ATPrepCmd, else do it */
if (recursing)
ATSimplePermissions(rel, false);
ATSimplePermissions(rel, false, false);
conrel = heap_open(ConstraintRelationId, RowExclusiveLock);
@ -6033,77 +6105,94 @@ ATPrepAlterColumnType(List **wqueue,
/* make sure datatype is legal for a column */
CheckAttributeType(colName, targettype, false);
/*
* Set up an expression to transform the old data value to the new type.
* If a USING option was given, transform and use that expression, else
* just take the old value and try to coerce it. We do this first so that
* type incompatibility can be detected before we waste effort, and
* because we need the expression to be parsed against the original table
* rowtype.
*/
if (cmd->transform)
if (tab->relkind == RELKIND_RELATION)
{
RangeTblEntry *rte;
/*
* Set up an expression to transform the old data value to the new type.
* If a USING option was given, transform and use that expression, else
* just take the old value and try to coerce it. We do this first so that
* type incompatibility can be detected before we waste effort, and
* because we need the expression to be parsed against the original table
* rowtype.
*/
if (cmd->transform)
{
RangeTblEntry *rte;
/* Expression must be able to access vars of old table */
rte = addRangeTableEntryForRelation(pstate,
rel,
NULL,
false,
true);
addRTEtoQuery(pstate, rte, false, true, true);
/* Expression must be able to access vars of old table */
rte = addRangeTableEntryForRelation(pstate,
rel,
NULL,
false,
true);
addRTEtoQuery(pstate, rte, false, true, true);
transform = transformExpr(pstate, cmd->transform);
transform = transformExpr(pstate, cmd->transform);
/* It can't return a set */
if (expression_returns_set(transform))
/* It can't return a set */
if (expression_returns_set(transform))
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("transform expression must not return a set")));
/* No subplans or aggregates, either... */
if (pstate->p_hasSubLinks)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("cannot use subquery in transform expression")));
if (pstate->p_hasAggs)
ereport(ERROR,
(errcode(ERRCODE_GROUPING_ERROR),
errmsg("cannot use aggregate function in transform expression")));
if (pstate->p_hasWindowFuncs)
ereport(ERROR,
(errcode(ERRCODE_WINDOWING_ERROR),
errmsg("cannot use window function in transform expression")));
}
else
{
transform = (Node *) makeVar(1, attnum,
attTup->atttypid, attTup->atttypmod,
0);
}
transform = coerce_to_target_type(pstate,
transform, exprType(transform),
targettype, targettypmod,
COERCION_ASSIGNMENT,
COERCE_IMPLICIT_CAST,
-1);
if (transform == NULL)
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("transform expression must not return a set")));
errmsg("column \"%s\" cannot be cast to type %s",
colName, format_type_be(targettype))));
/* No subplans or aggregates, either... */
if (pstate->p_hasSubLinks)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("cannot use subquery in transform expression")));
if (pstate->p_hasAggs)
ereport(ERROR,
(errcode(ERRCODE_GROUPING_ERROR),
errmsg("cannot use aggregate function in transform expression")));
if (pstate->p_hasWindowFuncs)
ereport(ERROR,
(errcode(ERRCODE_WINDOWING_ERROR),
errmsg("cannot use window function in transform expression")));
/*
* Add a work queue item to make ATRewriteTable update the column
* contents.
*/
newval = (NewColumnValue *) palloc0(sizeof(NewColumnValue));
newval->attnum = attnum;
newval->expr = (Expr *) transform;
tab->newvals = lappend(tab->newvals, newval);
}
else
if (tab->relkind == RELKIND_COMPOSITE_TYPE)
{
transform = (Node *) makeVar(1, attnum,
attTup->atttypid, attTup->atttypmod,
0);
/*
* For composite types, do this check now. Tables will check
* it later when the table is being rewritten.
*/
find_composite_type_dependencies(rel->rd_rel->reltype,
NULL,
RelationGetRelationName(rel));
find_typed_table_dependencies(rel->rd_rel->reltype,
RelationGetRelationName(rel));
}
transform = coerce_to_target_type(pstate,
transform, exprType(transform),
targettype, targettypmod,
COERCION_ASSIGNMENT,
COERCE_IMPLICIT_CAST,
-1);
if (transform == NULL)
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("column \"%s\" cannot be cast to type %s",
colName, format_type_be(targettype))));
/*
* Add a work queue item to make ATRewriteTable update the column
* contents.
*/
newval = (NewColumnValue *) palloc0(sizeof(NewColumnValue));
newval->attnum = attnum;
newval->expr = (Expr *) transform;
tab->newvals = lappend(tab->newvals, newval);
ReleaseSysCache(tuple);
/*
@ -7367,7 +7456,7 @@ ATExecAddInherit(Relation child_rel, RangeVar *parent, LOCKMODE lockmode)
* Must be owner of both parent and child -- child was checked by
* ATSimplePermissions call in ATPrepCmd
*/
ATSimplePermissions(parent_rel, false);
ATSimplePermissions(parent_rel, false, false);
/* Permanent rels cannot inherit from temporary ones */
if (parent_rel->rd_istemp && !child_rel->rd_istemp)

5
src/backend/commands/typecmds.c
View File

@ -1508,11 +1508,6 @@ DefineCompositeType(const RangeVar *typevar, List *coldeflist)
Oid typeNamespace;
Oid relid;
if (coldeflist == NIL)
ereport(ERROR,
(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
errmsg("composite type must have at least one attribute")));
/*
* now set the parameters for keys/inheritance etc. All of these are
* uninteresting for composite types...

165
src/backend/parser/gram.y
View File

@ -131,6 +131,7 @@ static Node *makeXmlExpr(XmlExprOp op, char *name, List *named_args,
List *args, int location);
static List *mergeTableFuncParameters(List *func_args, List *columns);
static TypeName *TableFuncTypeName(List *columns);
static RangeVar *makeRangeVarFromAnyName(List *names, int position, core_yyscan_t yyscanner);
%}
@ -184,7 +185,7 @@ static TypeName *TableFuncTypeName(List *columns);
AlterDatabaseStmt AlterDatabaseSetStmt AlterDomainStmt AlterFdwStmt
AlterForeignServerStmt AlterGroupStmt
AlterObjectSchemaStmt AlterOwnerStmt AlterSeqStmt AlterTableStmt
AlterUserStmt AlterUserMappingStmt AlterUserSetStmt
AlterCompositeTypeStmt AlterUserStmt AlterUserMappingStmt AlterUserSetStmt
AlterRoleStmt AlterRoleSetStmt
AlterDefaultPrivilegesStmt DefACLAction
AnalyzeStmt ClosePortalStmt ClusterStmt CommentStmt
@ -218,8 +219,8 @@ static TypeName *TableFuncTypeName(List *columns);
%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
%type <list> alter_table_cmds
%type <node> alter_table_cmd alter_type_cmd
%type <list> alter_table_cmds alter_type_cmds
%type <dbehavior> opt_drop_behavior
@ -295,7 +296,7 @@ static TypeName *TableFuncTypeName(List *columns);
reloption_list group_clause TriggerFuncArgs select_limit
opt_select_limit opclass_item_list opclass_drop_list
opt_opfamily transaction_mode_list_or_empty
TableFuncElementList opt_type_modifiers
OptTableFuncElementList TableFuncElementList opt_type_modifiers
prep_type_clause
execute_param_clause using_clause returning_clause
opt_enum_val_list enum_val_list table_func_column_list
@ -462,7 +463,7 @@ static TypeName *TableFuncTypeName(List *columns);
/* ordinary key words in alphabetical order */
%token <keyword> ABORT_P ABSOLUTE_P ACCESS ACTION ADD_P ADMIN AFTER
AGGREGATE ALL ALSO ALTER ALWAYS ANALYSE ANALYZE AND ANY ARRAY AS ASC
ASSERTION ASSIGNMENT ASYMMETRIC AT AUTHORIZATION
ASSERTION ASSIGNMENT ASYMMETRIC AT ATTRIBUTE AUTHORIZATION
BACKWARD BEFORE BEGIN_P BETWEEN BIGINT BINARY BIT
BOOLEAN_P BOTH BY
@ -657,6 +658,7 @@ stmt :
| AlterOwnerStmt
| AlterSeqStmt
| AlterTableStmt
| AlterCompositeTypeStmt
| AlterRoleSetStmt
| AlterRoleStmt
| AlterTSConfigurationStmt
@ -1968,6 +1970,72 @@ reloption_elem:
;
/*****************************************************************************
*
* ALTER TYPE
*
* really variants of the ALTER TABLE subcommands with different spellings
*****************************************************************************/
AlterCompositeTypeStmt:
ALTER TYPE_P any_name alter_type_cmds
{
AlterTableStmt *n = makeNode(AlterTableStmt);
/* can't use qualified_name, sigh */
n->relation = makeRangeVarFromAnyName($3, @3, yyscanner);
n->cmds = $4;
n->relkind = OBJECT_TYPE;
$$ = (Node *)n;
}
;
alter_type_cmds:
alter_type_cmd { $$ = list_make1($1); }
| alter_type_cmds ',' alter_type_cmd { $$ = lappend($1, $3); }
;
alter_type_cmd:
/* ALTER TYPE <name> ADD ATTRIBUTE <coldef> */
ADD_P ATTRIBUTE TableFuncElement
{
AlterTableCmd *n = makeNode(AlterTableCmd);
n->subtype = AT_AddColumn;
n->def = $3;
$$ = (Node *)n;
}
/* ALTER TYPE <name> DROP ATTRIBUTE IF EXISTS <attname> */
| DROP ATTRIBUTE IF_P EXISTS ColId
{
AlterTableCmd *n = makeNode(AlterTableCmd);
n->subtype = AT_DropColumn;
n->name = $5;
n->behavior = DROP_RESTRICT; /* currently no effect */
n->missing_ok = TRUE;
$$ = (Node *)n;
}
/* ALTER TYPE <name> DROP ATTRIBUTE <attname> */
| DROP ATTRIBUTE ColId opt_drop_behavior
{
AlterTableCmd *n = makeNode(AlterTableCmd);
n->subtype = AT_DropColumn;
n->name = $3;
n->behavior = DROP_RESTRICT; /* currently no effect */
n->missing_ok = FALSE;
$$ = (Node *)n;
}
/* ALTER TYPE <name> ALTER ATTRIBUTE <attname> [SET DATA] TYPE <typename> */
| ALTER ATTRIBUTE ColId opt_set_data TYPE_P Typename
{
AlterTableCmd *n = makeNode(AlterTableCmd);
n->subtype = AT_AlterColumnType;
n->name = $3;
n->def = (Node *) $6;
$$ = (Node *)n;
}
;
/*****************************************************************************
*
* QUERY :
@ -3678,39 +3746,12 @@ DefineStmt:
n->definition = NIL;
$$ = (Node *)n;
}
| CREATE TYPE_P any_name AS '(' TableFuncElementList ')'
| CREATE TYPE_P any_name AS '(' OptTableFuncElementList ')'
{
CompositeTypeStmt *n = makeNode(CompositeTypeStmt);
RangeVar *r = makeNode(RangeVar);
/* can't use qualified_name, sigh */
switch (list_length($3))
{
case 1:
r->catalogname = NULL;
r->schemaname = NULL;
r->relname = strVal(linitial($3));
break;
case 2:
r->catalogname = NULL;
r->schemaname = strVal(linitial($3));
r->relname = strVal(lsecond($3));
break;
case 3:
r->catalogname = strVal(linitial($3));
r->schemaname = strVal(lsecond($3));
r->relname = strVal(lthird($3));
break;
default:
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("improper qualified name (too many dotted names): %s",
NameListToString($3)),
parser_errposition(@3)));
break;
}
r->location = @3;
n->typevar = r;
n->typevar = makeRangeVarFromAnyName($3, @3, yyscanner);
n->coldeflist = $6;
$$ = (Node *)n;
}
@ -5836,6 +5877,15 @@ RenameStmt: ALTER AGGREGATE func_name aggr_args RENAME TO name
n->newname = $6;
$$ = (Node *)n;
}
| ALTER TYPE_P any_name RENAME ATTRIBUTE name TO name
{
RenameStmt *n = makeNode(RenameStmt);
n->renameType = OBJECT_ATTRIBUTE;
n->relation = makeRangeVarFromAnyName($3, @3, yyscanner);
n->subname = $6;
n->newname = $8;
$$ = (Node *)n;
}
;
opt_column: COLUMN { $$ = COLUMN; }
@ -8216,6 +8266,11 @@ where_or_current_clause:
;
OptTableFuncElementList:
TableFuncElementList { $$ = $1; }
| /*EMPTY*/ { $$ = NIL; }
;
TableFuncElementList:
TableFuncElement
{
@ -10897,6 +10952,7 @@ unreserved_keyword:
| ASSERTION
| ASSIGNMENT
| AT
| ATTRIBUTE
| BACKWARD
| BEFORE
| BEGIN_P
@ -11857,6 +11913,47 @@ TableFuncTypeName(List *columns)
return result;
}
/*
* Convert a list of (dotted) names to a RangeVar (like
* makeRangeVarFromNameList, but with position support). The
* "AnyName" refers to the any_name production in the grammar.
*/
static RangeVar *
makeRangeVarFromAnyName(List *names, int position, core_yyscan_t yyscanner)
{
RangeVar *r = makeNode(RangeVar);
switch (list_length(names))
{
case 1:
r->catalogname = NULL;
r->schemaname = NULL;
r->relname = strVal(linitial(names));
break;
case 2:
r->catalogname = NULL;
r->schemaname = strVal(linitial(names));
r->relname = strVal(lsecond(names));
break;
case 3:
r->catalogname = strVal(linitial(names));;
r->schemaname = strVal(lsecond(names));
r->relname = strVal(lthird(names));
break;
default:
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("improper qualified name (too many dotted names): %s",
NameListToString(names)),
parser_errposition(position)));
break;
}
r->location = position;
return r;
}
/*
* Must undefine this stuff before including scan.c, since it has different
* definitions for these macros.

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

@ -839,6 +839,9 @@ transformOfType(ParseState *pstate, CreateStmtContext *cxt, TypeName *ofTypename
Form_pg_attribute attr = tupdesc->attrs[i];
ColumnDef *n = makeNode(ColumnDef);
if (attr->attisdropped)
continue;
n->colname = pstrdup(NameStr(attr->attname));
n->typeName = makeTypeNameFromOid(attr->atttypid, attr->atttypmod);
n->constraints = NULL;

4
src/backend/tcop/utility.c
View File

@ -1657,6 +1657,7 @@ CreateCommandTag(Node *parsetree)
case OBJECT_TSCONFIGURATION:
tag = "ALTER TEXT SEARCH CONFIGURATION";
break;
case OBJECT_ATTRIBUTE:
case OBJECT_TYPE:
tag = "ALTER TYPE";
break;
@ -1780,6 +1781,9 @@ CreateCommandTag(Node *parsetree)
case OBJECT_SEQUENCE:
tag = "ALTER SEQUENCE";
break;
case OBJECT_TYPE:
tag = "ALTER TYPE";
break;
case OBJECT_VIEW:
tag = "ALTER VIEW";
break;

12
src/bin/pg_dump/pg_dump.c
View File

@ -7249,13 +7249,7 @@ dumpCompositeType(Archive *fout, TypeInfo *tyinfo)
res = PQexec(g_conn, query->data);
check_sql_result(res, g_conn, query->data, PGRES_TUPLES_OK);
/* Expecting at least a single result */
ntups = PQntuples(res);
if (ntups < 1)
{
write_msg(NULL, "query returned no rows: %s\n", query->data);
exit_nicely();
}
i_attname = PQfnumber(res, "attname");
i_atttypdefn = PQfnumber(res, "atttypdefn");
@ -7356,12 +7350,12 @@ dumpCompositeTypeColComments(Archive *fout, TypeInfo *tyinfo)
res = PQexec(g_conn, query->data);
check_sql_result(res, g_conn, query->data, PGRES_TUPLES_OK);
/* Expecting at least a single result */
ntups = PQntuples(res);
if (ntups < 1)
{
write_msg(NULL, "query returned no rows: %s\n", query->data);
exit_nicely();
PQclear(res);
destroyPQExpBuffer(query);
return;
}
pgClassOid = atooid(PQgetvalue(res, 0, PQfnumber(res, "tableoid")));

34
src/bin/psql/tab-complete.c
View File

@ -1253,15 +1253,45 @@ psql_completion(char *text, int start, int end)
COMPLETE_WITH_LIST(list_ALTERTEXTSEARCH3);
}
/* complete ALTER TYPE <foo> with OWNER TO, SET SCHEMA */
/* complete ALTER TYPE <foo> with actions */
else if (pg_strcasecmp(prev3_wd, "ALTER") == 0 &&
pg_strcasecmp(prev2_wd, "TYPE") == 0)
{
static const char *const list_ALTERTYPE[] =
{"OWNER TO", "RENAME TO", "SET SCHEMA", NULL};
{"ADD ATTRIBUTE", "ALTER ATTRIBUTE", "DROP ATTRIBUTE",
"OWNER TO", "RENAME", "SET SCHEMA", NULL};
COMPLETE_WITH_LIST(list_ALTERTYPE);
}
/* ALTER TYPE <foo> RENAME */
else if (pg_strcasecmp(prev4_wd, "ALTER") == 0 &&
pg_strcasecmp(prev3_wd, "TYPE") == 0 &&
pg_strcasecmp(prev_wd, "RENAME") == 0)
{
static const char *const list_ALTERTYPE[] =
{"ATTRIBUTE", "TO", NULL};
COMPLETE_WITH_LIST(list_ALTERTYPE);
}
/* ALTER TYPE xxx RENAME ATTRIBUTE yyy */
else if (pg_strcasecmp(prev5_wd, "TYPE") == 0 &&
pg_strcasecmp(prev3_wd, "RENAME") == 0 &&
pg_strcasecmp(prev2_wd, "ATTRIBUTE") == 0)
COMPLETE_WITH_CONST("TO");
/* If we have TYPE <sth> ALTER/DROP/RENAME ATTRIBUTE, provide list of attributes */
else if (pg_strcasecmp(prev4_wd, "TYPE") == 0 &&
(pg_strcasecmp(prev2_wd, "ALTER") == 0 ||
pg_strcasecmp(prev2_wd, "DROP") == 0 ||
pg_strcasecmp(prev2_wd, "RENAME") == 0) &&
pg_strcasecmp(prev_wd, "ATTRIBUTE") == 0)
COMPLETE_WITH_ATTR(prev3_wd, "");
/* ALTER TYPE ALTER ATTRIBUTE <foo> */
else if ((pg_strcasecmp(prev3_wd, "ALTER") == 0 &&
pg_strcasecmp(prev2_wd, "ATTRIBUTE") == 0))
{
COMPLETE_WITH_CONST("TYPE");
}
/* complete ALTER GROUP <foo> */
else if (pg_strcasecmp(prev3_wd, "ALTER") == 0 &&
pg_strcasecmp(prev2_wd, "GROUP") == 0)

1
src/include/nodes/parsenodes.h
View File

@ -1046,6 +1046,7 @@ typedef struct SetOperationStmt
typedef enum ObjectType
{
OBJECT_AGGREGATE,
OBJECT_ATTRIBUTE, /* type's attribute, when distinct from column */
OBJECT_CAST,
OBJECT_COLUMN,
OBJECT_CONSTRAINT,

1
src/include/parser/kwlist.h
View File

@ -49,6 +49,7 @@ PG_KEYWORD("assertion", ASSERTION, UNRESERVED_KEYWORD)
PG_KEYWORD("assignment", ASSIGNMENT, UNRESERVED_KEYWORD)
PG_KEYWORD("asymmetric", ASYMMETRIC, RESERVED_KEYWORD)
PG_KEYWORD("at", AT, UNRESERVED_KEYWORD)
PG_KEYWORD("attribute", ATTRIBUTE, UNRESERVED_KEYWORD)
PG_KEYWORD("authorization", AUTHORIZATION, TYPE_FUNC_NAME_KEYWORD)
PG_KEYWORD("backward", BACKWARD, UNRESERVED_KEYWORD)
PG_KEYWORD("before", BEFORE, UNRESERVED_KEYWORD)

89
src/test/regress/expected/alter_table.out
View File

@ -854,7 +854,7 @@ select * from myview;
(0 rows)
alter table myview drop d;
ERROR: "myview" is not a table
ERROR: "myview" is not a table or composite type
drop view myview;
-- test some commands to make sure they fail on the dropped column
analyze atacc1(a);
@ -1472,6 +1472,11 @@ select * from another;
(3 rows)
drop table another;
-- table's row type
create table tab1 (a int, b text);
create table tab2 (x int, y tab1);
alter table tab1 alter column b type varchar; -- fails
ERROR: cannot alter table "tab1" because column "tab2"."y" uses its rowtype
--
-- lock levels
--
@ -1683,3 +1688,85 @@ drop cascades to view alter2.v1
drop cascades to function alter2.plus1(integer)
drop cascades to type alter2.posint
drop cascades to type alter2.ctype
--
-- composite types
--
CREATE TYPE test_type AS (a int);
\d test_type
Composite type "public.test_type"
Column | Type
--------+---------
a | integer
ALTER TYPE nosuchtype ADD ATTRIBUTE b text; -- fails
ERROR: relation "nosuchtype" does not exist
ALTER TYPE test_type ADD ATTRIBUTE b text;
\d test_type
Composite type "public.test_type"
Column | Type
--------+---------
a | integer
b | text
ALTER TYPE test_type ADD ATTRIBUTE b text; -- fails
ERROR: column "b" of relation "test_type" already exists
ALTER TYPE test_type ALTER ATTRIBUTE b SET DATA TYPE varchar;
\d test_type
Composite type "public.test_type"
Column | Type
--------+-------------------
a | integer
b | character varying
ALTER TYPE test_type ALTER ATTRIBUTE b SET DATA TYPE integer;
\d test_type
Composite type "public.test_type"
Column | Type
--------+---------
a | integer
b | integer
ALTER TYPE test_type DROP ATTRIBUTE b;
\d test_type
Composite type "public.test_type"
Column | Type
--------+---------
a | integer
ALTER TYPE test_type DROP ATTRIBUTE c; -- fails
ERROR: column "c" of relation "test_type" does not exist
ALTER TYPE test_type DROP ATTRIBUTE IF EXISTS c;
NOTICE: column "c" of relation "test_type" does not exist, skipping
ALTER TYPE test_type DROP ATTRIBUTE a, ADD ATTRIBUTE d boolean;
\d test_type
Composite type "public.test_type"
Column | Type
--------+---------
d | boolean
ALTER TYPE test_type RENAME ATTRIBUTE a TO aa;
ERROR: column "a" does not exist
ALTER TYPE test_type RENAME ATTRIBUTE d TO dd;
\d test_type
Composite type "public.test_type"
Column | Type
--------+---------
dd | boolean
DROP TYPE test_type;
CREATE TYPE test_type1 AS (a int, b text);
CREATE TABLE test_tbl1 (x int, y test_type1);
ALTER TYPE test_type1 ALTER ATTRIBUTE b TYPE varchar; -- fails
ERROR: cannot alter type "test_type1" because column "test_tbl1"."y" uses it
CREATE TYPE test_type2 AS (a int, b text);
CREATE TABLE test_tbl2 OF test_type2;
ALTER TYPE test_type2 ADD ATTRIBUTE c text; -- fails
ERROR: cannot alter type "test_type2" because it is the type of a typed table
ALTER TYPE test_type2 ALTER ATTRIBUTE b TYPE varchar; -- fails
ERROR: cannot alter type "test_type2" because it is the type of a typed table
ALTER TYPE test_type2 DROP ATTRIBUTE b; -- fails
ERROR: cannot alter type "test_type2" because it is the type of a typed table
ALTER TYPE test_type2 RENAME ATTRIBUTE b TO bb; -- fails
ERROR: cannot alter type "test_type2" because it is the type of a typed table
CREATE TYPE test_type_empty AS ();
DROP TYPE test_type_empty;

55
src/test/regress/sql/alter_table.sql
View File

@ -1090,6 +1090,11 @@ select * from another;
drop table another;
-- table's row type
create table tab1 (a int, b text);
create table tab2 (x int, y tab1);
alter table tab1 alter column b type varchar; -- fails
--
-- lock levels
--
@ -1224,3 +1229,53 @@ select alter2.plus1(41);
-- clean up
drop schema alter2 cascade;
--
-- composite types
--
CREATE TYPE test_type AS (a int);
\d test_type
ALTER TYPE nosuchtype ADD ATTRIBUTE b text; -- fails
ALTER TYPE test_type ADD ATTRIBUTE b text;
\d test_type
ALTER TYPE test_type ADD ATTRIBUTE b text; -- fails
ALTER TYPE test_type ALTER ATTRIBUTE b SET DATA TYPE varchar;
\d test_type
ALTER TYPE test_type ALTER ATTRIBUTE b SET DATA TYPE integer;
\d test_type
ALTER TYPE test_type DROP ATTRIBUTE b;
\d test_type
ALTER TYPE test_type DROP ATTRIBUTE c; -- fails
ALTER TYPE test_type DROP ATTRIBUTE IF EXISTS c;
ALTER TYPE test_type DROP ATTRIBUTE a, ADD ATTRIBUTE d boolean;
\d test_type
ALTER TYPE test_type RENAME ATTRIBUTE a TO aa;
ALTER TYPE test_type RENAME ATTRIBUTE d TO dd;
\d test_type
DROP TYPE test_type;
CREATE TYPE test_type1 AS (a int, b text);
CREATE TABLE test_tbl1 (x int, y test_type1);
ALTER TYPE test_type1 ALTER ATTRIBUTE b TYPE varchar; -- fails
CREATE TYPE test_type2 AS (a int, b text);
CREATE TABLE test_tbl2 OF test_type2;
ALTER TYPE test_type2 ADD ATTRIBUTE c text; -- fails
ALTER TYPE test_type2 ALTER ATTRIBUTE b TYPE varchar; -- fails
ALTER TYPE test_type2 DROP ATTRIBUTE b; -- fails
ALTER TYPE test_type2 RENAME ATTRIBUTE b TO bb; -- fails
CREATE TYPE test_type_empty AS ();
DROP TYPE test_type_empty;