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Type table feature

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This adds the CREATE TABLE name OF type command, per SQL standard.
This commit is contained in:
Peter Eisentraut
2010-01-28 23:21:13 +00:00
parent 1f98cccb94
commit e7b3349a8a
25 changed files with 535 additions and 108 deletions
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58
src/backend/parser/parse_utilcmd.c
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@ -19,7 +19,7 @@
* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/backend/parser/parse_utilcmd.c,v 2.36 2010/01/02 16:57:50 momjian Exp $
* $PostgreSQL: pgsql/src/backend/parser/parse_utilcmd.c,v 2.37 2010/01/28 23:21:12 petere Exp $
*
*-------------------------------------------------------------------------
*/
@ -58,6 +58,7 @@
#include "utils/lsyscache.h"
#include "utils/relcache.h"
#include "utils/syscache.h"
#include "utils/typcache.h"
/* State shared by transformCreateStmt and its subroutines */
@ -104,6 +105,8 @@ static void transformTableConstraint(ParseState *pstate,
Constraint *constraint);
static void transformInhRelation(ParseState *pstate, CreateStmtContext *cxt,
InhRelation *inhrelation);
static void transformOfType(ParseState *pstate, CreateStmtContext *cxt,
TypeName *ofTypename);
static char *chooseIndexName(const RangeVar *relation, IndexStmt *index_stmt);
static IndexStmt *generateClonedIndexStmt(CreateStmtContext *cxt,
Relation parent_index, AttrNumber *attmap);
@ -183,6 +186,11 @@ transformCreateStmt(CreateStmt *stmt, const char *queryString)
cxt.pkey = NULL;
cxt.hasoids = interpretOidsOption(stmt->options);
Assert(!stmt->ofTypename || !stmt->inhRelations); /* grammar enforces */
if (stmt->ofTypename)
transformOfType(pstate, &cxt, stmt->ofTypename);
/*
* Run through each primary element in the table creation clause. Separate
* column defs from constraints, and do preliminary analysis.
@ -266,8 +274,9 @@ transformColumnDefinition(ParseState *pstate, CreateStmtContext *cxt,
/* Check for SERIAL pseudo-types */
is_serial = false;
if (list_length(column->typeName->names) == 1 &&
!column->typeName->pct_type)
if (column->typeName
&& list_length(column->typeName->names) == 1
&& !column->typeName->pct_type)
{
char *typname = strVal(linitial(column->typeName->names));
@ -299,7 +308,8 @@ transformColumnDefinition(ParseState *pstate, CreateStmtContext *cxt,
}
/* Do necessary work on the column type declaration */
transformColumnType(pstate, column);
if (column->typeName)
transformColumnType(pstate, column);
/* Special actions for SERIAL pseudo-types */
if (is_serial)
@ -787,6 +797,46 @@ transformInhRelation(ParseState *pstate, CreateStmtContext *cxt,
heap_close(relation, NoLock);
}
static void
transformOfType(ParseState *pstate, CreateStmtContext *cxt, TypeName *ofTypename)
{
HeapTuple tuple;
Form_pg_type typ;
TupleDesc tupdesc;
int i;
Oid ofTypeId;
AssertArg(ofTypename);
tuple = typenameType(NULL, ofTypename, NULL);
typ = (Form_pg_type) GETSTRUCT(tuple);
ofTypeId = HeapTupleGetOid(tuple);
ofTypename->typeOid = ofTypeId; /* cached for later */
if (typ->typtype != TYPTYPE_COMPOSITE)
ereport(ERROR,
(errcode(ERRCODE_WRONG_OBJECT_TYPE),
errmsg("type %s is not a composite type",
format_type_be(ofTypeId))));
tupdesc = lookup_rowtype_tupdesc(ofTypeId, -1);
for (i = 0; i < tupdesc->natts; i++)
{
ColumnDef *n = makeNode(ColumnDef);
Form_pg_attribute attr = tupdesc->attrs[i];
n->colname = NameStr(attr->attname);
n->typeName = makeTypeNameFromOid(attr->atttypid, attr->atttypmod);
n->constraints = NULL;
n->is_local = true;
n->is_from_type = true;
cxt->columns = lappend(cxt->columns, n);
}
DecrTupleDescRefCount(tupdesc);
ReleaseSysCache(tuple);
}
/*
* chooseIndexName
*