diff options
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/datatype.sgml | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/doc/src/sgml/datatype.sgml b/doc/src/sgml/datatype.sgml index ce9fffa0c27..7efc0a75893 100644 --- a/doc/src/sgml/datatype.sgml +++ b/doc/src/sgml/datatype.sgml @@ -1,5 +1,5 @@ <!-- -$Header: /cvsroot/pgsql/doc/src/sgml/datatype.sgml,v 1.60 2001/08/31 01:55:25 ishii Exp $ +$Header: /cvsroot/pgsql/doc/src/sgml/datatype.sgml,v 1.61 2001/09/04 03:17:54 momjian Exp $ --> <chapter id="datatype"> @@ -84,6 +84,12 @@ $Header: /cvsroot/pgsql/doc/src/sgml/datatype.sgml,v 1.60 2001/08/31 01:55:25 is </row> <row> + <entry><type>bytea</type></entry> + <entry></entry> + <entry>binary data</entry> + </row> + + <row> <entry><type>character(<replaceable>n</replaceable>)</type></entry> <entry><type>char(<replaceable>n</replaceable>)</type></entry> <entry>fixed-length character string</entry> @@ -782,7 +788,11 @@ CREATE TABLE <replaceable class="parameter">tablename</replaceable> (<replaceabl <entry>text</entry> <entry>Variable unlimited length</entry> </row> - </tbody> + <row> + <entry>bytea</entry> + <entry>binary data</entry> + </row> + </tbody> </tgroup> </table> @@ -830,6 +840,19 @@ CREATE TABLE <replaceable class="parameter">tablename</replaceable> (<replaceabl </para> <para> + The <type>bytea</type> data type allows storage of binary data, + specifically allowing storage of NULLs which are entered as + <literal>'\\000'</>. The first backslash is interpreted by the + single quotes, and the second is recognized by <type>bytea</> and + preceeds a three digit octal value. For a similar reason, a + backslash must be entered into a field as <literal>'\\\\'</> or + <literal>'\\134'</>. You may also have to escape line feeds and + carriage return if your interface automatically translates these. It + can store values of any length. <type>Bytea</> is a non-standard + data type. + </para> + + <para> The storage requirement for data of these types is 4 bytes plus the actual string, and in case of <type>character</type> plus the padding. Long strings will actually be compressed by the system |