index 06ccb6d2deaa3be898985626db04b15ca208b140..b6e143c5da54bc9e8965313ebb414910ac9bb150 100644 (file)
-<!-- $PostgreSQL: pgsql/doc/src/sgml/information_schema.sgml,v 1.38 2009年02月06日 21:15:11 tgl Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/information_schema.sgml,v 1.39 2009年06月10日 07:03:34 petere Exp $ -->
<chapter id="information-schema">
<title>The Information Schema</title>
<entry><literal>datetime_precision</literal></entry>
<entry><type>cardinal_number</type></entry>
<entry>
- If <literal>data_type</literal> identifies a date, time, or
- interval type, the declared precision; null for all other data
- types or if no precision was declared.
+ If <literal>data_type</literal> identifies a date, time,
+ timestamp, or interval type, this column contains the (declared
+ or implicit) fractional seconds precision of the type for this
+ attribute, that is, the number of decimal digits maintained
+ following the decimal point in the seconds value. For all
+ other data types, this column is null.
</entry>
</row>
<entry><literal>datetime_precision</literal></entry>
<entry><type>cardinal_number</type></entry>
<entry>
- If <literal>data_type</literal> identifies a date, time, or
- interval type, the declared precision; null for all other data
- types or if no precision was declared.
+ If <literal>data_type</literal> identifies a date, time,
+ timestamp, or interval type, this column contains the (declared
+ or implicit) fractional seconds precision of the type for this
+ column, that is, the number of decimal digits maintained
+ following the decimal point in the seconds value. For all
+ other data types, this column is null.
</entry>
</row>
<entry><type>cardinal_number</type></entry>
<entry>
If the domain has a numeric type, this column contains the
- (declared or implicit) precision of the type for this column.
+ (declared or implicit) precision of the type for this domain.
The precision indicates the number of significant digits. It
can be expressed in decimal (base 10) or binary (base 2) terms,
as specified in the column
<entry><type>cardinal_number</type></entry>
<entry>
If the domain has an exact numeric type, this column contains
- the (declared or implicit) scale of the type for this column.
+ the (declared or implicit) scale of the type for this domain.
The scale indicates the number of significant digits to the
right of the decimal point. It can be expressed in decimal
(base 10) or binary (base 2) terms, as specified in the column
<entry><literal>datetime_precision</literal></entry>
<entry><type>cardinal_number</type></entry>
<entry>
- If the domain has a date, time, or interval type, the declared
- precision; null for all other data types or if no precision was
- declared.
+ If <literal>data_type</literal> identifies a date, time,
+ timestamp, or interval type, this column contains the (declared
+ or implicit) fractional seconds precision of the type for this
+ domain, that is, the number of decimal digits maintained
+ following the decimal point in the seconds value. For all
+ other data types, this column is null.
</entry>
</row>
index 80132e27ea477b4f707f09bd0fd0db10438c4bc1..b295abbeab5581fac8c2a64e934fd7f912b125bf 100644 (file)
*
* Copyright (c) 2003-2009, PostgreSQL Global Development Group
*
- * $PostgreSQL: pgsql/src/backend/catalog/information_schema.sql,v 1.53 2009年02月24日 10:06:32 petere Exp $
+ * $PostgreSQL: pgsql/src/backend/catalog/information_schema.sql,v 1.54 2009年06月10日 07:03:34 petere Exp $
*/
/*
@@ -160,12 +160,12 @@ CREATE FUNCTION _pg_datetime_precision(typid oid, typmod int4) RETURNS integer
RETURNS NULL ON NULL INPUT
AS
$$SELECT
- CASE WHEN $2 = -1 /* default typmod */
- THEN null
+ CASE WHEN $1 IN (1082) /* date */
+ THEN 0
WHEN 1ドル IN (1083, 1114, 1184, 1266) /* time, timestamp, same + tz */
- THEN 2ドル
+ THEN CASE WHEN 2ドル < 0 THEN 6 ELSE 2ドル END
WHEN 1ドル IN (1186) /* interval */
- THEN 2ドル & 65535
+ THEN CASE WHEN 2ドル < 0 THEN 6 ELSE 2ドル & 65535 END
ELSE null
END$$;