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php-manual-zh-5.2.4-1mdv2008.1.noarch.rpm

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>db2_special_columns</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN83243"
></A
><P
>    (PECL)</P
>db2_special_columns&nbsp;--&nbsp;
   Returns a result set listing the unique row identifier columns for a table
  </DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN83246"
></A
><H2
>说明</H2
>resource <B
CLASS="methodname"
>db2_special_columns</B
> ( resource connection, string qualifier, string schema, string table_name, int scope )<BR
></BR
><P
>&#13;   Returns a result set listing the unique row identifier columns for a table.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN83267"
></A
><H2
>参数</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>connection</CODE
></DT
><DD
><P
>&#13;       A valid connection to an IBM DB2, Cloudscape, or Apache Derby database.
      </P
></DD
><DT
><CODE
CLASS="parameter"
>qualifier</CODE
></DT
><DD
><P
>&#13;       A qualifier for DB2 databases running on OS/390 or z/OS servers. For
       other databases, pass <TT
CLASS="constant"
><B
>NULL</B
></TT
> or an empty string.
      </P
></DD
><DT
><CODE
CLASS="parameter"
>schema</CODE
></DT
><DD
><P
>&#13;       The schema which contains the tables.
      </P
></DD
><DT
><CODE
CLASS="parameter"
>table_name</CODE
></DT
><DD
><P
>&#13;       The name of the table.
      </P
></DD
><DT
><CODE
CLASS="parameter"
>scope</CODE
></DT
><DD
><P
>&#13;       Integer value representing the minimum duration for which the
       unique row identifier is valid. This can be one of the following
       values:
       <DIV
CLASS="informaltable"
><P
></P
><A
NAME="AEN83297"
></A
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><COL><COL><COL><THEAD
><TR
><TH
>Integer value</TH
><TH
>SQL constant</TH
><TH
>Description</TH
></TR
></THEAD
><TBODY
><TR
><TD
>0</TD
><TD
>SQL_SCOPE_CURROW</TD
><TD
>Row identifier is valid only while the cursor is positioned
           on the row.</TD
></TR
><TR
><TD
>1</TD
><TD
>SQL_SCOPE_TRANSACTION</TD
><TD
>Row identifier is valid for the duration of the
            transaction.</TD
></TR
><TR
><TD
>2</TD
><TD
>SQL_SCOPE_SESSION</TD
><TD
>Row identifier is valid for the duration of the
            connection.</TD
></TR
></TBODY
></TABLE
><P
></P
></DIV
>
      </P
></DD
></DL
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN83317"
></A
><H2
>返回值</H2
><P
>&#13;   Returns a statement resource with a result set containing rows with unique
   row identifier information for a table. The rows are composed of the
   following columns:
   <DIV
CLASS="informaltable"
><P
></P
><A
NAME="AEN83320"
></A
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><COL><COL><THEAD
><TR
><TH
>Column name</TH
><TH
>Description</TH
></TR
></THEAD
><TBODY
><TR
><TD
>SCOPE</TD
><TD
>&#13;        <P
>&#13;         <DIV
CLASS="informaltable"
><P
></P
><A
NAME="AEN83331"
></A
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><COL><COL><COL><THEAD
><TR
><TD
>Integer value</TD
><TD
>SQL constant</TD
><TD
>Description</TD
></TR
></THEAD
><TBODY
><TR
><TD
>0</TD
><TD
>SQL_SCOPE_CURROW</TD
><TD
>Row identifier is valid only while the cursor is positioned
             on the row.</TD
></TR
><TR
><TD
>1</TD
><TD
>SQL_SCOPE_TRANSACTION</TD
><TD
>Row identifier is valid for the duration of the
              transaction.</TD
></TR
><TR
><TD
>2</TD
><TD
>SQL_SCOPE_SESSION</TD
><TD
>Row identifier is valid for the duration of the
              connection.</TD
></TR
></TBODY
></TABLE
><P
></P
></DIV
>
        </P
>
       </TD
></TR
><TR
><TD
>COLUMN_NAME</TD
><TD
>Name of the unique column.</TD
></TR
><TR
><TD
>DATA_TYPE</TD
><TD
>SQL data type for the column.</TD
></TR
><TR
><TD
>TYPE_NAME</TD
><TD
>Character string representation of the SQL data type for the
       column.</TD
></TR
><TR
><TD
>COLUMN_SIZE</TD
><TD
>An integer value representing the size of the column.</TD
></TR
><TR
><TD
>BUFFER_LENGTH</TD
><TD
>&#13;        Maximum number of bytes necessary to store data from this column.
       </TD
></TR
><TR
><TD
>DECIMAL_DIGITS</TD
><TD
>&#13;        The scale of the column, or <TT
CLASS="constant"
><B
>NULL</B
></TT
> where scale is not applicable.
       </TD
></TR
><TR
><TD
>NUM_PREC_RADIX</TD
><TD
>&#13;        An integer value of either <TT
CLASS="literal"
>10</TT
> (representing
        an exact numeric data type), <TT
CLASS="literal"
>2</TT
> (representing an
        approximate numeric data type), or <TT
CLASS="constant"
><B
>NULL</B
></TT
> (representing a data type for
        which radix is not applicable).
       </TD
></TR
><TR
><TD
>PSEUDO_COLUMN</TD
><TD
>Always returns 1.</TD
></TR
></TBODY
></TABLE
><P
></P
></DIV
>

  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN83379"
></A
><H2
>参见</H2
><P
>&#13;   <P
></P
><TABLE
BORDER="0"
><TBODY
><TR
><TD
><A
HREF="function.db2-column-privileges.html"
><B
CLASS="function"
>db2_column_privileges()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.db2-columns.html"
><B
CLASS="function"
>db2_columns()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.db2-foreign-keys.html"
><B
CLASS="function"
>db2_foreign_keys()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.db2-primary-keys.html"
><B
CLASS="function"
>db2_primary_keys()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.db2-procedure-columns.html"
><B
CLASS="function"
>db2_procedure_columns()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.db2-procedures.html"
><B
CLASS="function"
>db2_procedures()</B
></A
></TD
></TR
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><TD
><A
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><B
CLASS="function"
>db2_statistics()</B
></A
></TD
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><TD
><A
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><B
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>db2_table_privileges()</B
></A
></TD
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><B
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>db2_tables()</B
></A
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