aggfinalfn
regproc
pg_proc.oid
- Final function
+ Final function (zero if none)
|
aggtranstype
int2
- This is a copy of the
+ This is a copy of
pg_type.typlen
- for this column's type.
+ of this column's type.
atttypmod records type-specific data
supplied at table creation time (for example, the maximum
length of a varchar column). It is passed to
- type-specific input and output functions as the third
- argument. The value will generally be -1 for types that do not
- need typmod.
+ type-specific input functions and length coercion functions.
+ The value will generally be -1 for types that do not need typmod.
char
- A copy of
+ Normally a copy of
pg_type.typstorage
- of this column's type
+ of this column's type. For TOASTable datatypes, this can be altered
+ after column creation to control storage policy.
table. This includes indexes (but see also
pg_index), sequences, views, and some
kinds of special relation; see relkind.
-. Below, when we mean all of these
+ Below, when we mean all of these
kinds of objects we speak of relations
. Not all
fields are meaningful for all relation types.
|
conkey
- smallint[]
+ int2[]
pg_attribute.attnum
If a table constraint, list of columns which the constraint constrains
|
confkey
- smallint[]
+ int2[]
pg_attribute.attnum
If a foreign key, list of the referenced columns
datdba
int4
pg_shadow.usesysid
- Owner of the database, initially who created it
+ Owner of the database, usually the user who created it
|
|
objsubid
- integer
+ int4
For a table attribute, this is the attribute's
column number (the objid and classid refer to the table itself).
|
refobjsubid
- integer
+ int4
For a table attribute, this is the attribute's
- column number (the objid and classid refer to the table itself).
+ column number (the refobjid and refclassid refer to the table itself).
For all other object types, this field is presently zero.
The pg_description table can store an optional description or
comment for each database object. Descriptions can be manipulated
- with the COMMENT command. Client applications
- can view the descriptions by joining with this table. Many built-in
- system objects have comments associated with them that are shown by
+ with the COMMENT command and viewed with
+ Descriptions of many built-in system objects are provided in the initial
+ contents of pg_description.
indexrelid
oid
pg_class.oid
- The oid of the pg_class entry for this index
+ The OID of the pg_class entry for this index
|
indrelid
oid
pg_class.oid
- The oid of the pg_class entry for the table this index is for
+ The OID of the pg_class entry for the table this index is for
|
indproc
regproc
pg_proc.oid
- The registered procedure if this is a functional index
+ The function's OID if this is a functional index,
+ else zero
|
INDEX_MAX_KEYS values that indicate which
table columns this index pertains to. For example a value of
1 3 would mean that the first and the third
- column make up the index key.
+ column make up the index key. For a functional index, these
+ columns are the inputs to the function, and the function's return
+ value is the index key.
text
Expression tree (in the form of a nodeToString representation)
- for partial index predicate
+ for partial index predicate. Empty string if not a partial
+ index.
oid
pg_class.oid
- This is the reference to the subtable, that is, it records the
- fact that the identified table is inherited from some other
- table.
+ The OID of the child table.
oid
pg_class.oid
- This is the reference to the parent table, which the table
- referenced by inhrelid inherited
- from.
+ The OID of the parent table.
int4
- If there is more than one parent for a subtable (multiple
+ If there is more than one parent for a child table (multiple
inheritance), this number tells the order in which the
inherited columns are to be arranged. The count starts at 1.
+ Unused fields contain zeroes, for example oprleft is zero for a
+ prefix operator.
+
+
|
- proistrusted
+ prosecdef
bool
- not functional
+ Function is a security definer (i.e., a setuid
+ function)
|
prorettype
oid
pg_type.oid
- Data type of the return value (0 if the function does not return a value)
+ Data type of the return value
|
Rule name
- |
- ev_type
- char
-
- Event type that the rule is for: '1' = SELECT,
- '2' = UPDATE, '3' = INSERT, '4' = DELETE
-
-
|
ev_class
oid
indicate the whole table)
+ |
+ ev_type
+ char
+
+ Event type that the rule is for: '1' = SELECT,
+ '2' = UPDATE, '3' = INSERT, '4' = DELETE
+
+
|
is_instead
bool
tgname
name
- Trigger name (need not be unique)
+ Trigger name (must be unique among triggers of same table)
|
tgisconstraint
bool
- True if trigger is a RI constraint
+ True if trigger implements an RI constraint
|
True if the type is defined, false if this is a placeholder
entry for a not-yet-defined type. When typisdefined is false,
- nothing except the type name and OID can be relied on.
+ nothing except the type name, namespace, and OID can be relied on.
typinput
regproc
pg_proc.oid
- Input function
+ Input conversion function
|
typoutput
regproc
pg_proc.oid
- Output function
+ Output conversion function
|
int4
- typtypmod records type-specific data
- supplied at table creation time (for example, the maximum
- length of a varchar column). It is passed to
- type-specific input and output functions as the third
- argument. The value will generally be -1 for types that do not
- need typmod. This value is copied to
- pg_attribute.atttypmod when
- creating a column of a domain type.
-
+ Domains use typtypmod to record the typmod
+ to be applied to their base type (-1 if base type does not use a
+ typmod). -1 if this type is not a domain.
+
|
typndims is the number of array dimensions
- for a domain that is an array. (The array element type is
- typbasetype.) Zero for non-domains and non-array domains.
- This value is copied to
- pg_attribute.attndims when
- creating a column of a domain type.
+ for a domain that is an array (that is, typbasetype is an array type;
+ the domain's typelem will match the base type's typelem).
+ Zero for non-domains and non-array domains.
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $Id: pg_type.h,v 1.133 2002/09/04 20:31:42 momjian Exp $
+ * $Id: pg_type.h,v 1.134 2002/09/24 21:26:44 tgl Exp $
*
* NOTES
* the genbki.sh script reads this file and generates .bki
Oid typbasetype;
/*
- * typtypmod records type-specific data supplied at domain creation
- * time (for example, the max length of a varchar field). It is
- * passed to type-specific input and output functions as the third
- * argument. The value will generally be -1 for types that do not need
- * typmod. This value is copied to pg_attribute.atttypmod when
- * creating a column of a domain type.
+ * Domains use typtypmod to record the typmod to be applied to their
+ * base type (-1 if base type does not use a typmod). -1 if this type
+ * is not a domain.
*/
int4 typtypmod;
/*
- * typndims is the declared number of dimensions for a domain type
- * that is an array (with element type typbasetype). Otherwise zero.
+ * typndims is the declared number of dimensions for an array domain type
+ * (i.e., typbasetype is an array type; the domain's typelem will match
+ * the base type's typelem). Otherwise zero.
*/
int4 typndims;
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