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><H1
><A
NAME="PYGRESQL-QUERY"
>query</A
></H1
><DIV
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><A
NAME="AEN29675"
></A
><H2
>Name</H2
>query -- execute a SQL command</DIV
><DIV
CLASS="REFSYNOPSISDIV"
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NAME="AEN29678"
></A
><H2
>Synopsis</H2
><PRE
CLASS="SYNOPSIS"
>query(<TT
CLASS="PARAMETER"
><I
>command</I
></TT
>)</PRE
><DIV
CLASS="REFSECT2"
><A
NAME="R2-PYGRESQL-QUERY-1"
></A
><H3
>Parameters</H3
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="PARAMETER"
><I
>command</I
></TT
></DT
><DD
><P
>SQL command (string).</P
></DD
></DL
></DIV
></DIV
><DIV
CLASS="REFSECT2"
><A
NAME="R2-PYGRESQL-QUERY-2"
></A
><H3
>Return Type</H3
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="CLASSNAME"
>pgqueryobject</TT
> or <TT
CLASS="SYMBOL"
>None</TT
></DT
><DD
><P
> Result values.
</P
></DD
></DL
></DIV
></DIV
><DIV
CLASS="REFSECT2"
><A
NAME="R2-PYGRESQL-QUERY-3"
></A
><H3
>Exceptions</H3
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="CLASSNAME"
>TypeError</TT
></DT
><DD
><P
> Bad argument type, or too many arguments.
</P
></DD
><DT
><TT
CLASS="CLASSNAME"
>ValueError</TT
></DT
><DD
><P
> Empty SQL query.
</P
></DD
><DT
><TT
CLASS="CLASSNAME"
>pg.error</TT
></DT
><DD
><P
> Error during query processing, or invalid connection.
</P
></DD
></DL
></DIV
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="R1-PYGRESQL-QUERY-1"
></A
><H2
>Description</H2
><P
> <TT
CLASS="FUNCTION"
>query()</TT
> method sends a <SPAN
CLASS="ACRONYM"
>SQL</SPAN
>
query to the database. If the query is an insert statement, the return
value is the <SPAN
CLASS="ACRONYM"
>OID</SPAN
> of the newly inserted row.
If it is otherwise a query that does not return a result
(i.e., is not a some kind of <TT
CLASS="LITERAL"
>SELECT</TT
> statement), it returns <TT
CLASS="SYMBOL"
>None</TT
>.
Otherwise, it returns a <TT
CLASS="CLASSNAME"
>pgqueryobject</TT
> that can be accessed via the
<TT
CLASS="FUNCTION"
>getresult()</TT
> or <TT
CLASS="FUNCTION"
>dictresult()</TT
>
methods or simply printed.
</P
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