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postgresql/src/include/catalog/namespace.h

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pg_class has a relnamespace column. You can create and access tables in schemas other than the system namespace; however, there's no search path yet, and not all operations work yet on tables outside the system namespace.
2002-03-26 20:17:02 +01:00
/*-------------------------------------------------------------------------
*
* namespace.h
* prototypes for functions in backend/catalog/namespace.c
*
*
Update copyright to 2002.
2002-06-20 22:29:54 +02:00
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
pg_class has a relnamespace column. You can create and access tables in schemas other than the system namespace; however, there's no search path yet, and not all operations work yet on tables outside the system namespace.
2002-03-26 20:17:02 +01:00
* Portions Copyright (c) 1994, Regents of the University of California
*
Update copyright to 2002.
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* $Id: namespace.h,v 1.15 2002/06/20 20:29:43 momjian Exp $
pg_class has a relnamespace column. You can create and access tables in schemas other than the system namespace; however, there's no search path yet, and not all operations work yet on tables outside the system namespace.
2002-03-26 20:17:02 +01:00
*
*-------------------------------------------------------------------------
*/
#ifndef NAMESPACE_H
#define NAMESPACE_H
#include "nodes/primnodes.h"
Implement partial-key searching of syscaches, per recent suggestion to pghackers. Use this to do searching for ambiguous functions --- it will get more uses soon.
2002-04-06 08:59:25 +02:00
/*
* This structure holds a list of possible functions or operators
* found by namespace lookup. Each function/operator is identified
* by OID and by argument types; the list must be pruned by type
* resolution rules that are embodied in the parser, not here.
*/
typedef struct _FuncCandidateList
{
struct _FuncCandidateList *next;
int pathpos; /* for internal use of namespace lookup */
Oid oid; /* the function or operator's OID */
Implement types regprocedure, regoper, regoperator, regclass, regtype per pghackers discussion. Add some more typsanity tests, and clean up some problems exposed thereby (broken or missing array types for some built-in types). Also, clean up loose ends from unknownin/out patch.
2002-04-25 04:56:56 +02:00
int nargs; /* number of arg types returned */
Implement partial-key searching of syscaches, per recent suggestion to pghackers. Use this to do searching for ambiguous functions --- it will get more uses soon.
2002-04-06 08:59:25 +02:00
Oid args[1]; /* arg types --- VARIABLE LENGTH ARRAY */
} *FuncCandidateList; /* VARIABLE LENGTH STRUCT */
Opclasses live in namespaces. I also took the opportunity to create an 'opclass owner' column in pg_opclass. Nothing is done with it at present, but since there are plans to invent a CREATE OPERATOR CLASS command soon, we'll probably want DROP OPERATOR CLASS too, which suggests that a notion of ownership would be a good idea.
2002-04-17 22:57:57 +02:00
/*
* This structure holds a list of opclass candidates found by namespace
* lookup.
*/
typedef struct _OpclassCandidateList
{
struct _OpclassCandidateList *next;
char *opcname_tmp; /* for internal use of namespace lookup */
int pathpos; /* for internal use of namespace lookup */
Oid oid; /* the opclass's OID */
Oid opcintype; /* type of input data for opclass */
bool opcdefault; /* T if opclass is default for opcintype */
Oid opckeytype; /* type of index data, or InvalidOid */
} *OpclassCandidateList;
Implement partial-key searching of syscaches, per recent suggestion to pghackers. Use this to do searching for ambiguous functions --- it will get more uses soon.
2002-04-06 08:59:25 +02:00
pg_class has a relnamespace column. You can create and access tables in schemas other than the system namespace; however, there's no search path yet, and not all operations work yet on tables outside the system namespace.
2002-03-26 20:17:02 +01:00
extern Oid RangeVarGetRelid(const RangeVar *relation, bool failOK);
extern Oid RangeVarGetCreationNamespace(const RangeVar *newRelation);
extern Oid RelnameGetRelid(const char *relname);
Add routines in namespace.c to determine whether objects are visible in the search path. (We might want to make these available as SQL functions too, but I haven't done that yet.) Fix format_type to be schema-aware.
2002-05-02 01:06:41 +02:00
extern bool RelationIsVisible(Oid relid);
pg_class has a relnamespace column. You can create and access tables in schemas other than the system namespace; however, there's no search path yet, and not all operations work yet on tables outside the system namespace.
2002-03-26 20:17:02 +01:00
Further cleanups for relations in schemas: teach nextval and other sequence functions how to cope with qualified names. Same code is also used for int4notin, currtid_byrelname, pgstattuple. Also, move TOAST tables into special pg_toast namespace.
2002-03-30 02:02:42 +01:00
extern Oid TypenameGetTypid(const char *typname);
Add routines in namespace.c to determine whether objects are visible in the search path. (We might want to make these available as SQL functions too, but I haven't done that yet.) Fix format_type to be schema-aware.
2002-05-02 01:06:41 +02:00
extern bool TypeIsVisible(Oid typid);
Opclasses live in namespaces. I also took the opportunity to create an 'opclass owner' column in pg_opclass. Nothing is done with it at present, but since there are plans to invent a CREATE OPERATOR CLASS command soon, we'll probably want DROP OPERATOR CLASS too, which suggests that a notion of ownership would be a good idea.
2002-04-17 22:57:57 +02:00
Implement partial-key searching of syscaches, per recent suggestion to pghackers. Use this to do searching for ambiguous functions --- it will get more uses soon.
2002-04-06 08:59:25 +02:00
extern FuncCandidateList FuncnameGetCandidates(List *names, int nargs);
Add routines in namespace.c to determine whether objects are visible in the search path. (We might want to make these available as SQL functions too, but I haven't done that yet.) Fix format_type to be schema-aware.
2002-05-02 01:06:41 +02:00
extern bool FunctionIsVisible(Oid funcid);
Implement partial-key searching of syscaches, per recent suggestion to pghackers. Use this to do searching for ambiguous functions --- it will get more uses soon.
2002-04-06 08:59:25 +02:00
Operators live in namespaces. CREATE/DROP/COMMENT ON OPERATOR take qualified operator names directly, for example CREATE OPERATOR myschema.+ ( ... ). To qualify an operator name in an expression you need to write OPERATOR(myschema.+) (thanks to Peter for suggesting an escape hatch). I also took advantage of having to reformat pg_operator to fix something that'd been bugging me for a while: mergejoinable operators should have explicit links to the associated cross-data-type comparison operators, rather than hardwiring an assumption that they are named < and >.
2002-04-17 01:08:12 +02:00
extern FuncCandidateList OpernameGetCandidates(List *names, char oprkind);
Add routines in namespace.c to determine whether objects are visible in the search path. (We might want to make these available as SQL functions too, but I haven't done that yet.) Fix format_type to be schema-aware.
2002-05-02 01:06:41 +02:00
extern bool OperatorIsVisible(Oid oprid);
Operators live in namespaces. CREATE/DROP/COMMENT ON OPERATOR take qualified operator names directly, for example CREATE OPERATOR myschema.+ ( ... ). To qualify an operator name in an expression you need to write OPERATOR(myschema.+) (thanks to Peter for suggesting an escape hatch). I also took advantage of having to reformat pg_operator to fix something that'd been bugging me for a while: mergejoinable operators should have explicit links to the associated cross-data-type comparison operators, rather than hardwiring an assumption that they are named < and >.
2002-04-17 01:08:12 +02:00
Opclasses live in namespaces. I also took the opportunity to create an 'opclass owner' column in pg_opclass. Nothing is done with it at present, but since there are plans to invent a CREATE OPERATOR CLASS command soon, we'll probably want DROP OPERATOR CLASS too, which suggests that a notion of ownership would be a good idea.
2002-04-17 22:57:57 +02:00
extern OpclassCandidateList OpclassGetCandidates(Oid amid);
Add routines in namespace.c to determine whether objects are visible in the search path. (We might want to make these available as SQL functions too, but I haven't done that yet.) Fix format_type to be schema-aware.
2002-05-02 01:06:41 +02:00
extern Oid OpclassnameGetOpcid(Oid amid, const char *opcname);
extern bool OpclassIsVisible(Oid opcid);
Opclasses live in namespaces. I also took the opportunity to create an 'opclass owner' column in pg_opclass. Nothing is done with it at present, but since there are plans to invent a CREATE OPERATOR CLASS command soon, we'll probably want DROP OPERATOR CLASS too, which suggests that a notion of ownership would be a good idea.
2002-04-17 22:57:57 +02:00
pg_type has a typnamespace column; system now supports creating types in different namespaces. Also, cleanup work on relation namespace support: drop, alter, rename commands work for tables in non-default namespaces.
2002-03-29 20:06:29 +01:00
extern Oid QualifiedNameGetCreationNamespace(List *names, char **objname_p);
extern RangeVar *makeRangeVarFromNameList(List *names);
Functions live in namespaces. Qualified function names work, eg SELECT schema1.func2(...). Aggregate names can be qualified at the syntactic level, but the qualification is ignored for the moment.
2002-04-09 22:35:55 +02:00
extern char *NameListToString(List *names);
Reimplement temp tables using schemas. The temp table map is history; temp table entries in pg_class have the names the user would expect.
2002-03-31 08:26:32 +02:00
extern bool isTempNamespace(Oid namespaceId);
Support temporary setting of search path during CREATE SCHEMA; this allows the example in the CREATE SCHEMA ref page to actually work now. Also, clean up when the transaction that initially creates a temp-table namespace is later aborted. Simplify internal representation of search path by folding special cases into the main list.
2002-05-17 22:53:33 +02:00
extern void PushSpecialNamespace(Oid namespaceId);
extern void PopSpecialNamespace(Oid namespaceId);
/* initialization & transaction cleanup code */
extern void InitializeSearchPath(void);
extern void AtEOXact_Namespace(bool isCommit);
Create a new GUC variable search_path to control the namespace search path. The default behavior if no per-user schemas are created is that all users share a 'public' namespace, thus providing behavior backwards compatible with 7.2 and earlier releases. Probably the semantics and default setting will need to be fine-tuned, but this is a start.
2002-04-01 05:34:27 +02:00
/* stuff for search_path GUC variable */
extern char *namespace_search_path;
Merge the last few variable.c configuration variables into the generic GUC support. It's now possible to set datestyle, timezone, and client_encoding from postgresql.conf and per-database or per-user settings. Also, implement rollback of SET commands that occur in a transaction that later fails. Create a SET LOCAL var = value syntax that sets the variable only for the duration of the current transaction. All per previous discussions in pghackers.
2002-05-17 03:19:19 +02:00
extern const char *assign_search_path(const char *newval,
bool doit, bool interactive);
Create a new GUC variable search_path to control the namespace search path. The default behavior if no per-user schemas are created is that all users share a 'public' namespace, thus providing behavior backwards compatible with 7.2 and earlier releases. Probably the semantics and default setting will need to be fine-tuned, but this is a start.
2002-04-01 05:34:27 +02:00
Support temporary setting of search path during CREATE SCHEMA; this allows the example in the CREATE SCHEMA ref page to actually work now. Also, clean up when the transaction that initially creates a temp-table namespace is later aborted. Simplify internal representation of search path by folding special cases into the main list.
2002-05-17 22:53:33 +02:00
extern List *fetch_search_path(bool includeImplicit);
Add current_schema() and current_schemas() inquiry functions. Update has_table_privilege functions to cope with schema-qualified names in the same way as nextval() and others.
2002-04-26 03:24:08 +02:00
pg_class has a relnamespace column. You can create and access tables in schemas other than the system namespace; however, there's no search path yet, and not all operations work yet on tables outside the system namespace.
2002-03-26 20:17:02 +01:00
#endif /* NAMESPACE_H */