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<chapter id="pgtcl">
 <title>pgtcl - Tcl Binding Library</title>

 <indexterm zone="pgtcl">
  <primary>libpgtcl</primary>
 </indexterm>

 <indexterm zone="pgtcl">
  <primary>Tcl</primary>
 </indexterm>
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<Para>
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<literal>pgtcl</literal> is a tcl package for front-end programs 
to interface with <ProductName>Postgres</ProductName>
backends.  It makes most of the functionality of <literal>libpq</literal> available to
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tcl scripts.
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</Para>

<Para>
This package was originally written by Jolly Chen.
</Para>

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<Sect1 id="libpgtcl-commands">
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<Title>Commands</Title>

<Para>
<TABLE TOCENTRY="1">
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<TITLE><literal>pgtcl</literal> Commands</TITLE>
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<TGROUP COLS="2">
<THEAD>
  <ROW>
    <ENTRY>Command</ENTRY>
    <ENTRY>Description</ENTRY>
  </ROW>
</THEAD>
<TBODY>
  <ROW>
    <ENTRY>pg_connect</ENTRY>
    <ENTRY>opens a connection to the backend server</ENTRY>
  </ROW>
  <ROW>
    <ENTRY>pg_disconnect</ENTRY>
    <ENTRY>closes a connection</ENTRY>
  </ROW>
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  <ROW>
    <ENTRY>pg_conndefaults</ENTRY>
    <ENTRY>get connection options and their defaults</ENTRY>
  </ROW>
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  <ROW>
    <ENTRY>pg_exec</ENTRY>
    <ENTRY>send a query to the backend</ENTRY>
  </ROW>
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  <ROW>
    <ENTRY>pg_result</ENTRY>
    <ENTRY>manipulate the results of a query</ENTRY>
  </ROW>
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  <ROW>
    <ENTRY>pg_select</ENTRY>
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    <ENTRY>loop over the result of a SELECT statement</ENTRY>
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  </ROW>
  <ROW>
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    <ENTRY>pg_listen</ENTRY>
    <ENTRY>establish a callback for NOTIFY messages</ENTRY>
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  </ROW>

  <ROW>
    <ENTRY>pg_lo_creat</ENTRY>
    <ENTRY>create a large object</ENTRY>
  </ROW>
  <ROW>
    <ENTRY>pg_lo_open</ENTRY>
    <ENTRY>open a large object</ENTRY>
  </ROW>
  <ROW>
    <ENTRY>pg_lo_close</ENTRY>
    <ENTRY>close a large object</ENTRY>
  </ROW>
  <ROW>
    <ENTRY>pg_lo_read</ENTRY>
    <ENTRY>read a large object</ENTRY>
  </ROW>
  <ROW>
    <ENTRY>pg_lo_write</ENTRY>
    <ENTRY>write a large object</ENTRY>
  </ROW>
  <ROW>
    <ENTRY>pg_lo_lseek</ENTRY>
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    <ENTRY>seek to a position in a large object</ENTRY>
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  </ROW>
  <ROW>
    <ENTRY>pg_lo_tell</ENTRY>
    <ENTRY>return the current seek position of a large object</ENTRY>
  </ROW>
  <ROW>
    <ENTRY>pg_lo_unlink</ENTRY>
    <ENTRY>delete a large object</ENTRY>
  </ROW>
  <ROW>
    <ENTRY>pg_lo_import</ENTRY>
    <ENTRY>import a Unix file into a large object</ENTRY>
  </ROW>
  <ROW>
    <ENTRY>pg_lo_export</ENTRY>
    <ENTRY>export a large object into a Unix file</ENTRY>
  </ROW>
</TBODY>
</TGROUP>
</TABLE>
</Para>

<Para>
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These commands are described further on subsequent pages.
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</Para>

<Para>
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The pg_lo* routines are interfaces to the Large Object features of
<ProductName>Postgres</ProductName>.
The functions are designed to mimic the analogous file system functions in
the standard Unix file system interface.
The pg_lo* routines should be used within a BEGIN/END transaction
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block because the file descriptor returned by pg_lo_open is only valid for
the current transaction.  pg_lo_import and pg_lo_export MUST be used
in a BEGIN/END transaction block.
</Para>

</Sect1>

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<Sect1 id="libpgtcl-examples">
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<Title>Examples</Title>

<Para>
Here's a small example of how to use the routines:

<ProgramListing>
# getDBs :
#   get the names of all the databases at a given host and port number
#   with the defaults being the localhost and port 5432
#   return them in alphabetical order
proc getDBs { {host "localhost"} {port "5432"} } {
    # datnames is the list to be result
    set conn [pg_connect template1 -host $host -port $port]
    set res [pg_exec $conn "SELECT datname FROM pg_database ORDER BY datname"]
    set ntups [pg_result $res -numTuples]
    for {set i 0} {$i < $ntups} {incr i} {
	lappend datnames [pg_result $res -getTuple $i]
    }
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    pg_result $res -clear
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    pg_disconnect $conn
    return $datnames
}
</ProgramListing>

</Para>
</Sect1>

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<Sect1 id="libpgtcl-ref">
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<Title>pgtcl Command Reference Information</Title>
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<REFENTRY ID="PGTCL-PGCONNECT">
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<REFMETA>
<REFENTRYTITLE>pg_connect</REFENTRYTITLE>
<REFMISCINFO>PGTCL - Connection Management</REFMISCINFO>
</REFMETA>
<REFNAMEDIV>
<REFNAME>pg_connect
</REFNAME>
<REFPURPOSE>opens a connection to the backend server
</REFPURPOSE>
<INDEXTERM ID="IX-PGTCL-PGCONNECT-1"><PRIMARY>pgtcl</PRIMARY><SECONDARY>connecting</SECONDARY></INDEXTERM>
<INDEXTERM ID="IX-PGTCL-PGCONNECT-2"><PRIMARY>pg_connect</PRIMARY></INDEXTERM>
</REFNAMEDIV>
<REFSYNOPSISDIV>
<REFSYNOPSISDIVINFO>
<DATE>1997-12-24</DATE>
</REFSYNOPSISDIVINFO>
<SYNOPSIS>
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pg_connect -conninfo <REPLACEABLE CLASS="PARAMETER">connectOptions</REPLACEABLE>
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pg_connect <REPLACEABLE CLASS="PARAMETER">dbName</REPLACEABLE> <OPTIONAL>-host <REPLACEABLE CLASS="PARAMETER">hostName</REPLACEABLE></OPTIONAL>
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  <OPTIONAL>-port <REPLACEABLE
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  CLASS="PARAMETER">portNumber</REPLACEABLE></OPTIONAL> <OPTIONAL>-tty <REPLACEABLE
  CLASS="PARAMETER">pqtty</REPLACEABLE></OPTIONAL>
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  <OPTIONAL>-options <REPLACEABLE
  CLASS="PARAMETER">optionalBackendArgs</REPLACEABLE></OPTIONAL>
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</SYNOPSIS>

<REFSECT2 ID="R2-PGTCL-PGCONNECT-1">
<REFSECT2INFO>
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<DATE>1998-10-07</DATE>
</REFSECT2INFO>
<TITLE>Inputs (new style)
</TITLE>
<VARIABLELIST>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">connectOptions</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>A string of connection options, each written in the form keyword = value.
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A list of valid options can be found in <filename>libpq</>'s
<function>PQconnectdb()</> manual entry.
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</PARA>
</LISTITEM>
</VARLISTENTRY>
</VARIABLELIST>
</REFSECT2>

<REFSECT2 ID="R2-PGTCL-PGCONNECT-2">
<REFSECT2INFO>
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<DATE>1997-12-24</DATE>
</REFSECT2INFO>
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<TITLE>Inputs (old style)
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</TITLE>
<VARIABLELIST>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">dbName</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>Specifies a valid database name.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
  <OPTIONAL>-host <REPLACEABLE CLASS="PARAMETER">hostName</REPLACEABLE></OPTIONAL>
</TERM>
<LISTITEM>
<PARA>Specifies the domain name of the backend server for <REPLACEABLE CLASS="PARAMETER">dbName</REPLACEABLE>.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
  <OPTIONAL>-port <REPLACEABLE CLASS="PARAMETER">portNumber</REPLACEABLE></OPTIONAL>
</TERM>
<LISTITEM>
<PARA>Specifies the IP port number of the backend server for <REPLACEABLE CLASS="PARAMETER">dbName</REPLACEABLE>.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
  <OPTIONAL>-tty <REPLACEABLE CLASS="PARAMETER">pqtty</REPLACEABLE></OPTIONAL>
</TERM>
<LISTITEM>
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<PARA>Specifies file or tty for optional debug output from backend.
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</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
  <OPTIONAL>-options <REPLACEABLE CLASS="PARAMETER">optionalBackendArgs</REPLACEABLE></OPTIONAL>
</TERM>
<LISTITEM>
<PARA>Specifies options for the backend server for <REPLACEABLE CLASS="PARAMETER">dbName</REPLACEABLE>.
</PARA>
</LISTITEM>
</VARLISTENTRY>
</VARIABLELIST>
</REFSECT2>

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<REFSECT2 ID="R2-PGTCL-PGCONNECT-3">
<REFSECT2INFO>
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<DATE>1997-12-24</DATE>
</REFSECT2INFO>
<TITLE>Outputs
</TITLE>
<VARIABLELIST>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">dbHandle</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>
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If successful, a handle for a database connection is returned.
Handles start with the prefix "pgsql".
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</PARA>
</LISTITEM>
</VARLISTENTRY>
</VARIABLELIST>
</REFSECT2>
</REFSYNOPSISDIV>

<!-- ********************************************************** -->

<REFSECT1 ID="R1-PGTCL-PGCONNECT-1">
<REFSECT1INFO>
<DATE>1997-12-24</DATE>
</REFSECT1INFO>
<TITLE>Description
</TITLE>
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<PARA><FUNCTION>pg_connect</FUNCTION> opens a connection to the
<ProductName>Postgres</ProductName> backend.
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</Para>
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<para>
Two syntaxes are available.  In the older one, each possible option
has a separate option switch in the pg_connect statement.  In the
newer form, a single option string is supplied that can contain
multiple option values.  See <FUNCTION>pg_conndefaults</FUNCTION>
for info about the available options in the newer syntax.
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</PARA>
</REFSECT1>
<REFSECT1 ID="R1-PGTCL-PGCONNECT-2">
<TITLE>Usage
</TITLE>
<PARA>XXX thomas 1997-12-24
</PARA>
</REFSECT1>
</REFENTRY>

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<REFENTRY ID="PGTCL-PGDISCONNECT">
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<REFMETA>
<REFENTRYTITLE>pg_disconnect</REFENTRYTITLE>
<REFMISCINFO>PGTCL - Connection Management</REFMISCINFO>
</REFMETA>
<REFNAMEDIV>
<REFNAME>pg_disconnect
</REFNAME>
<REFPURPOSE>closes a connection to the backend server
</REFPURPOSE>
<INDEXTERM ID="IX-PGTCL-PGDISCONNECT-1"><PRIMARY>pgtcl</PRIMARY><SECONDARY>connecting</SECONDARY></INDEXTERM>
<INDEXTERM ID="IX-PGTCL-PGDISCONNECT-2"><PRIMARY>pg_connect</PRIMARY></INDEXTERM>
</REFNAMEDIV>
<REFSYNOPSISDIV>
<REFSYNOPSISDIVINFO>
<DATE>1997-12-24</DATE>
</REFSYNOPSISDIVINFO>
<SYNOPSIS>
pg_disconnect <REPLACEABLE CLASS="PARAMETER">dbHandle</REPLACEABLE>
</SYNOPSIS>

<REFSECT2 ID="R2-PGTCL-PGDISCONNECT-1">
<REFSECT2INFO>
<DATE>1997-12-24</DATE>
</REFSECT2INFO>
<TITLE>Inputs
</TITLE>
<VARIABLELIST>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">dbHandle</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>Specifies a valid database handle.
</PARA>
</LISTITEM>
</VARLISTENTRY>
</VARIABLELIST>
</REFSECT2>

<REFSECT2 ID="R2-PGTCL-PGDISCONNECT-2">
<REFSECT2INFO>
<DATE>1997-12-24</DATE>
</REFSECT2INFO>
<TITLE>Outputs
</TITLE>
<VARIABLELIST>
<VARLISTENTRY>
<TERM>
  None
</TERM>
<LISTITEM>
<PARA>
</PARA>
</LISTITEM>
</VARLISTENTRY>
</VARIABLELIST>
</REFSECT2>
</REFSYNOPSISDIV>

<REFSECT1 ID="R1-PGTCL-PGDISCONNECT-1">
<REFSECT1INFO>
<DATE>1997-12-24</DATE>
</REFSECT1INFO>
<TITLE>Description
</TITLE>
<PARA><FUNCTION>pg_disconnect</FUNCTION> closes a connection to the <ProductName>Postgres</ProductName> backend.
</PARA>
</REFSECT1>

</REFENTRY>

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<REFENTRY ID="PGTCL-PGCONNDEFAULTS">
<REFMETA>
<REFENTRYTITLE>pg_conndefaults</REFENTRYTITLE>
<REFMISCINFO>PGTCL - Connection Management</REFMISCINFO>
</REFMETA>
<REFNAMEDIV>
<REFNAME>pg_conndefaults
</REFNAME>
<REFPURPOSE>obtain information about default connection parameters
</REFPURPOSE>
<INDEXTERM ID="IX-PGTCL-PGCONNDEFAULTS-1"><PRIMARY>pgtcl</PRIMARY><SECONDARY>connecting</SECONDARY></INDEXTERM>
<INDEXTERM ID="IX-PGTCL-PGCONNDEFAULTS-2"><PRIMARY>pg_conndefaults</PRIMARY></INDEXTERM>
</REFNAMEDIV>
<REFSYNOPSISDIV>
<REFSYNOPSISDIVINFO>
<DATE>1998-10-07</DATE>
</REFSYNOPSISDIVINFO>
<SYNOPSIS>
pg_conndefaults
</SYNOPSIS>

<REFSECT2 ID="R2-PGTCL-PGCONNDEFAULTS-1">
<REFSECT2INFO>
<DATE>1998-10-07</DATE>
</REFSECT2INFO>
<TITLE>Inputs
</TITLE>
<PARA>
None.
</PARA>
</REFSECT2>

<REFSECT2 ID="R2-PGTCL-PGCONNDEFAULTS-2">
<REFSECT2INFO>
<DATE>1998-10-07</DATE>
</REFSECT2INFO>
<TITLE>Outputs
</TITLE>
<VARIABLELIST>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">option list</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>
The result is a list describing the possible connection options and their
current default values.
Each entry in the list is a sublist of the format:
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</Para>
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<para>
	 {optname label dispchar dispsize value}
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</Para>
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<Para>
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where the optname is usable as an option in
<FUNCTION>pg_connect -conninfo</FUNCTION>.
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</PARA>
</LISTITEM>
</VARLISTENTRY>
</VARIABLELIST>
</REFSECT2>
</REFSYNOPSISDIV>

<REFSECT1 ID="R1-PGTCL-PGCONNDEFAULTS-1">
<REFSECT1INFO>
<DATE>1998-10-07</DATE>
</REFSECT1INFO>
<TITLE>Description
</TITLE>
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<para>
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<FUNCTION>pg_conndefaults</FUNCTION> returns info about the connection
options available in <FUNCTION>pg_connect -conninfo</FUNCTION> and the
current default value for each option.
</PARA>
</REFSECT1>
<REFSECT1 ID="R1-PGTCL-PGCONNDEFAULTS-2">
<TITLE>Usage
</TITLE>
<PARA>pg_conndefaults
</PARA>
</REFSECT1>
</REFENTRY>

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<REFENTRY ID="PGTCL-PGEXEC">
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<REFMETA>
<REFENTRYTITLE>pg_exec</REFENTRYTITLE>
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<REFMISCINFO>PGTCL - Query Processing</REFMISCINFO>
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</REFMETA>
<REFNAMEDIV>
<REFNAME>pg_exec
</REFNAME>
<REFPURPOSE>
send a query string to the backend 
</REFPURPOSE>
<INDEXTERM ID="IX-PGTCL-PGEXEC-1"><PRIMARY>pgtcl</PRIMARY><SECONDARY>connecting</SECONDARY></INDEXTERM>
<INDEXTERM ID="IX-PGTCL-PGEXEC-2"><PRIMARY>pg_connect</PRIMARY></INDEXTERM>
</REFNAMEDIV>
<REFSYNOPSISDIV>
<REFSYNOPSISDIVINFO>
<DATE>1997-12-24</DATE>
</REFSYNOPSISDIVINFO>
<SYNOPSIS>
pg_exec <REPLACEABLE CLASS="PARAMETER">dbHandle</REPLACEABLE> <REPLACEABLE CLASS="PARAMETER">queryString</REPLACEABLE>
</SYNOPSIS>

<!-- ********************************************************** -->

<REFSECT2 ID="R2-PGTCL-PGEXEC-1">
<REFSECT2INFO>
<DATE>1997-12-24</DATE>
</REFSECT2INFO>
<TITLE>Inputs
</TITLE>
<VARIABLELIST>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">dbHandle</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>Specifies a valid database handle.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">queryString</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>Specifies a valid SQL query.
</PARA>
</LISTITEM>
</VARLISTENTRY>
</VARIABLELIST>
</REFSECT2>

<REFSECT2 ID="R2-PGTCL-PGEXEC-2">
<REFSECT2INFO>
<DATE>1997-12-24</DATE>
</REFSECT2INFO>
<TITLE>Outputs
</TITLE>
<VARIABLELIST>
<VARLISTENTRY>
<TERM>
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  <REPLACEABLE CLASS="PARAMETER">resultHandle</REPLACEABLE>
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</TERM>
<LISTITEM>
<PARA>
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A Tcl error will be returned if Pgtcl was unable to obtain a backend
response.  Otherwise, a query result object is created and a handle for
it is returned.  This handle can be passed to <FUNCTION>pg_result</FUNCTION>
to obtain the results of the query.
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</PARA>
</LISTITEM>
</VARLISTENTRY>
</VARIABLELIST>
</REFSECT2></REFSYNOPSISDIV>

<REFSECT1 ID="R1-PGTCL-PGEXEC-1">
<REFSECT1INFO>
<DATE>1997-12-24</DATE>
</REFSECT1INFO>
<TITLE>Description
</TITLE>
<PARA>
<FUNCTION>pg_exec</FUNCTION> submits a query to the <ProductName>Postgres</ProductName> backend and returns a result.
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Query result handles start with the connection handle and add a period
and a result number.
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</Para>
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<PARA>
Note that lack of a Tcl error is not proof that the query succeeded!
An error message returned by the backend will be processed
as a query result with failure status, not by generating a Tcl error
in pg_exec.
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</PARA>
</REFSECT1>
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</refentry>
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<REFENTRY ID="PGTCL-PGRESULT">
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<REFMETA>
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<REFENTRYTITLE>pg_result</REFENTRYTITLE>
<REFMISCINFO>PGTCL - Query Processing</REFMISCINFO>
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</REFMETA>
<REFNAMEDIV>
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<REFNAME>pg_result
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</REFNAME>
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<REFPURPOSE>
get information about a query result
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</REFPURPOSE>
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<INDEXTERM ID="IX-PGTCL-PGRESULT-1"><PRIMARY>pgtcl</PRIMARY><SECONDARY>connecting</SECONDARY></INDEXTERM>
<INDEXTERM ID="IX-PGTCL-PGRESULT-2"><PRIMARY>pg_connect</PRIMARY></INDEXTERM>
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</REFNAMEDIV>
<REFSYNOPSISDIV>
<REFSYNOPSISDIVINFO>
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<DATE>1997-12-24</DATE>
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</REFSYNOPSISDIVINFO>
<SYNOPSIS>
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pg_result <REPLACEABLE CLASS="PARAMETER">resultHandle</REPLACEABLE> <REPLACEABLE CLASS="PARAMETER">resultOption</REPLACEABLE>
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</SYNOPSIS>
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<REFSECT2 ID="R2-PGTCL-PGRESULT-1">
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<REFSECT2INFO>
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<DATE>1997-12-24</DATE>
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</REFSECT2INFO>
<TITLE>Inputs
</TITLE>
<VARIABLELIST>
<VARLISTENTRY>
<TERM>
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  <REPLACEABLE CLASS="PARAMETER">resultHandle</REPLACEABLE>
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</TERM>
<LISTITEM>
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<PARA>
  The handle for a query result.
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</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
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  <REPLACEABLE CLASS="PARAMETER">resultOption</REPLACEABLE>
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</TERM>
<LISTITEM>
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<PARA>
Specifies one of several possible options.
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</PARA>
</LISTITEM>
</VARLISTENTRY>
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</VARIABLELIST>

<REFSECT3>
<TITLE>Options</TITLE>

<VARIABLELIST>
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<VARLISTENTRY>
<TERM>
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-status  
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</TERM>
<LISTITEM>
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<PARA>
the status of the result.
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</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
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-error
</TERM>
<LISTITEM>
<PARA>
the error message, if the status indicates error; otherwise an empty string.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
-conn
</TERM>
<LISTITEM>
<PARA>
the connection that produced the result.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
-oid
</TERM>
<LISTITEM>
<PARA>
if the command was an INSERT, the OID of the 
inserted tuple; otherwise an empty string.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
-numTuples
</TERM>
<LISTITEM>
<PARA>
the number of tuples returned by the query.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
-numAttrs
</TERM>
<LISTITEM>
<PARA>
the number of attributes in each tuple.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
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-list VarName
</TERM>
<LISTITEM>
<PARA>
assign the results to a list of lists.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
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-assign arrayName
</TERM>
<LISTITEM>
<PARA>
assign the results to an array, using subscripts of the form
(tupno,attributeName).
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
-assignbyidx arrayName ?appendstr?
</TERM>
<LISTITEM>
<PARA>
assign the results to an array using the first attribute's value and
the remaining attributes' names as keys.  If appendstr is given then
it is appended to each key.  In short, all but the first field of each
tuple are stored into the array, using subscripts of the form
(firstFieldValue,fieldNameAppendStr).
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
-getTuple tupleNumber
</TERM>
<LISTITEM>
<PARA>
returns the fields of the indicated tuple in a list.  Tuple numbers
start at zero.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
-tupleArray tupleNumber arrayName
</TERM>
<LISTITEM>
<PARA>
stores the fields of the tuple in array arrayName, indexed by field names.
Tuple numbers start at zero.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
-attributes
</TERM>
<LISTITEM>
<PARA>
returns a list of the names of the tuple attributes.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
-lAttributes
752 753 754
</TERM>
<LISTITEM>
<PARA>
755 756 757 758 759 760 761 762 763 764 765
returns a list of sublists, {name ftype fsize} for each tuple attribute.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
-clear 
</TERM>
<LISTITEM>
<PARA>
clear the result query object.
766 767 768 769
</PARA>
</LISTITEM>
</VARLISTENTRY>
</VARIABLELIST>
770
</REFSECT3>
771 772
</REFSECT2>

773 774 775 776 777 778 779 780 781 782 783 784
<REFSECT2 ID="R2-PGTCL-PGRESULT-2">
<REFSECT2INFO>
<DATE>1997-12-24</DATE>
</REFSECT2INFO>
<TITLE>Outputs
</TITLE>
<PARA>
The result depends on the selected option, as described above.
</PARA>
</REFSECT2></REFSYNOPSISDIV>

<REFSECT1 ID="R1-PGTCL-PGRESULT-1">
785
<REFSECT1INFO>
786
<DATE>1997-12-24</DATE>
787 788 789
</REFSECT1INFO>
<TITLE>Description
</TITLE>
790 791 792
<PARA>
<FUNCTION>pg_result</FUNCTION> returns information about a query result
created by a prior <FUNCTION>pg_exec</FUNCTION>.
793
</Para>
794 795

<para>
796 797 798 799 800
You can keep a query result around for as long as you need it, but when
you are done with it, be sure to free it by
executing <FUNCTION>pg_result -clear</FUNCTION>.  Otherwise, you have
a memory leak, and Pgtcl will eventually start complaining that you've
created too many query result objects.
801 802 803 804 805 806
</PARA>
</REFSECT1>
</REFENTRY>

<!-- ********************************************************** -->

807
<REFENTRY ID="PGTCL-PGSELECT">
808 809
<REFMETA>
<REFENTRYTITLE>pg_select</REFENTRYTITLE>
810
<REFMISCINFO>PGTCL - Query Processing</REFMISCINFO>
811 812 813 814 815
</REFMETA>
<REFNAMEDIV>
<REFNAME>pg_select
</REFNAME>
<REFPURPOSE>
816
loop over the result of a SELECT statement
817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885
</REFPURPOSE>
<INDEXTERM ID="IX-PGTCL-PGSELECT-1"><PRIMARY>pgtcl</PRIMARY><SECONDARY>connecting</SECONDARY></INDEXTERM>
<INDEXTERM ID="IX-PGTCL-PGSELECT-2"><PRIMARY>pg_connect</PRIMARY></INDEXTERM>
</REFNAMEDIV>
<REFSYNOPSISDIV>
<REFSYNOPSISDIVINFO>
<DATE>1997-12-24</DATE>
</REFSYNOPSISDIVINFO>
<SYNOPSIS>
pg_select <REPLACEABLE CLASS="PARAMETER">dbHandle</REPLACEABLE> <REPLACEABLE CLASS="PARAMETER">queryString</REPLACEABLE>
  <REPLACEABLE CLASS="PARAMETER">arrayVar</REPLACEABLE> <REPLACEABLE CLASS="PARAMETER">queryProcedure</REPLACEABLE>
</SYNOPSIS>

<REFSECT2 ID="R2-PGTCL-PGSELECT-1">
<REFSECT2INFO>
<DATE>1997-12-24</DATE>
</REFSECT2INFO>
<TITLE>Inputs
</TITLE>
<VARIABLELIST>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">dbHandle</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>Specifies a valid database handle.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">queryString</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>Specifies a valid SQL select query.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">arrayVar</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>Array variable for tuples returned.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">queryProcedure</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>Procedure run on each tuple found.
</PARA>
</LISTITEM>
</VARLISTENTRY>
</VARIABLELIST>

</REFSECT2>

<REFSECT2 ID="R2-PGTCL-PGSELECT-2">
<REFSECT2INFO>
<DATE>1997-12-24</DATE>
</REFSECT2INFO>
<TITLE>Outputs
</TITLE>
<VARIABLELIST>
<VARLISTENTRY>
<TERM>
886
  <REPLACEABLE CLASS="PARAMETER">resultHandle</REPLACEABLE>
887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903
</TERM>
<LISTITEM>
<PARA>
   the return result is either an error message or a handle for a query result.
</PARA>
</LISTITEM>
</VARLISTENTRY>
</VARIABLELIST>
</REFSECT2></REFSYNOPSISDIV>

<REFSECT1 ID="R1-PGTCL-PGSELECT-1">
<REFSECT1INFO>
<DATE>1997-12-24</DATE>
</REFSECT1INFO>
<TITLE>Description
</TITLE>
<PARA>
904 905 906
<FUNCTION>pg_select</FUNCTION> submits a SELECT query to the
<ProductName>Postgres</ProductName> backend, and executes a
given chunk of code for each tuple in the result.
907
  The <REPLACEABLE CLASS="PARAMETER">queryString</REPLACEABLE>
908
  must be a SELECT statement.  Anything else returns an error.
909
  The <REPLACEABLE CLASS="PARAMETER">arrayVar</REPLACEABLE>
910 911 912 913 914 915
  variable is an array name used in the loop.  For each tuple,
  <REPLACEABLE CLASS="PARAMETER">arrayVar</REPLACEABLE> is filled in
  with the tuple field values, using the field names as the array
  indexes.  Then the
  <REPLACEABLE CLASS="PARAMETER">queryProcedure</REPLACEABLE>
  is executed.
916 917 918 919 920 921 922
</PARA>
</REFSECT1>

<REFSECT1 ID="R1-PGTCL-PGSELECT-2">
<TITLE>Usage
</TITLE>
<PARA>
923 924
This would work if table "table" has fields "control" and "name"
(and, perhaps, other fields):
925
<ProgramListing>
926
	pg_select $pgconn "SELECT * from table" array {
927 928 929 930 931 932 933 934 935 936
		puts [format "%5d %s" array(control) array(name)]
	}
</ProgramListing>
</PARA>
</REFSECT1>

</REFENTRY>

<!-- ********************************************************** -->

937
<REFENTRY ID="PGTCL-PGLISTEN">
938
<REFMETA>
939 940
<REFENTRYTITLE>pg_listen</REFENTRYTITLE>
<REFMISCINFO>PGTCL - Asynchronous Notify</REFMISCINFO>
941 942
</REFMETA>
<REFNAMEDIV>
943
<REFNAME>pg_listen
944
</REFNAME>
945
<REFPURPOSE>sets or changes a callback for asynchronous NOTIFY messages
946
</REFPURPOSE>
947 948
<INDEXTERM ID="IX-PGTCL-PGLISTEN-1"><PRIMARY>pgtcl</PRIMARY><SECONDARY>notify</SECONDARY></INDEXTERM>
<INDEXTERM ID="IX-PGTCL-PGLISTEN-2"><PRIMARY>notify</PRIMARY></INDEXTERM>
949 950 951
</REFNAMEDIV>
<REFSYNOPSISDIV>
<REFSYNOPSISDIVINFO>
952
<DATE>1998-5-22</DATE>
953 954
</REFSYNOPSISDIVINFO>
<SYNOPSIS>
955
pg_listen <REPLACEABLE CLASS="PARAMETER">dbHandle</REPLACEABLE> <REPLACEABLE CLASS="PARAMETER">notifyName</REPLACEABLE> <REPLACEABLE CLASS="PARAMETER">callbackCommand</REPLACEABLE>
956
</SYNOPSIS>
957 958

<REFSECT2 ID="R2-PGTCL-PGLISTEN-1">
959
<REFSECT2INFO>
960
<DATE>1998-5-22</DATE>
961 962 963 964 965 966
</REFSECT2INFO>
<TITLE>Inputs
</TITLE>
<VARIABLELIST>
<VARLISTENTRY>
<TERM>
967
  <REPLACEABLE CLASS="PARAMETER">dbHandle</REPLACEABLE>
968 969
</TERM>
<LISTITEM>
970
<PARA>Specifies a valid database handle.
971 972 973 974 975
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
976
  <REPLACEABLE CLASS="PARAMETER">notifyName</REPLACEABLE>
977 978
</TERM>
<LISTITEM>
979
<PARA>Specifies the notify condition name to start or stop listening to.
980 981 982 983 984
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
985
  <REPLACEABLE CLASS="PARAMETER">callbackCommand</REPLACEABLE>
986 987
</TERM>
<LISTITEM>
988 989
<PARA>If present and not empty, provides the command string to execute
when a matching notification arrives.
990 991 992 993 994 995
</PARA>
</LISTITEM>
</VARLISTENTRY>
</VARIABLELIST>
</REFSECT2>

996
<REFSECT2 ID="R2-PGTCL-PGLISTEN-2">
997
<REFSECT2INFO>
998
<DATE>1998-5-22</DATE>
999 1000 1001 1002 1003 1004
</REFSECT2INFO>
<TITLE>Outputs
</TITLE>
<VARIABLELIST>
<VARLISTENTRY>
<TERM>
1005
  None
1006 1007 1008 1009 1010 1011 1012
</TERM>
<LISTITEM>
<PARA>
</PARA>
</LISTITEM>
</VARLISTENTRY>
</VARIABLELIST>
1013 1014
</REFSECT2>
</REFSYNOPSISDIV>
1015

1016
<REFSECT1 ID="R1-PGTCL-PGLISTEN-1">
1017
<REFSECT1INFO>
1018
<DATE>1998-5-22</DATE>
1019 1020 1021
</REFSECT1INFO>
<TITLE>Description
</TITLE>
1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040
<PARA><FUNCTION>pg_listen</FUNCTION> creates, changes, or cancels a request
to listen for asynchronous NOTIFY messages from the
<ProductName>Postgres</ProductName> backend.  With a callbackCommand
parameter, the request is established, or the command string of an already
existing request is replaced.  With no callbackCommand parameter, a prior
request is canceled.
</PARA>

<para>
After a <FUNCTION>pg_listen</FUNCTION> request is established,
the specified command string is executed whenever a NOTIFY message bearing
the given name arrives from the backend.  This occurs when any
<ProductName>Postgres</ProductName> client application issues a NOTIFY command
referencing that name.  (Note that the name can be, but does not have to be,
that of an existing relation in the database.)
The command string is executed from the Tcl idle loop.  That is the normal
idle state of an application written with Tk.  In non-Tk Tcl shells, you can
execute <FUNCTION>update</FUNCTION> or <FUNCTION>vwait</FUNCTION> to cause
the idle loop to be entered.
1041
</Para>
1042 1043 1044 1045 1046 1047

<para>
You should not invoke the SQL statements LISTEN or UNLISTEN directly when
using <FUNCTION>pg_listen</FUNCTION>.  Pgtcl takes care of issuing those
statements for you.  But if you want to send a NOTIFY message yourself,
invoke the SQL NOTIFY statement using <FUNCTION>pg_exec</FUNCTION>.
1048 1049
</PARA>
</REFSECT1>
1050

1051 1052 1053 1054
</REFENTRY>

<!-- ********************************************************** -->

1055
<REFENTRY ID="PGTCL-PGLOCREAT">
1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147
<REFMETA>
<REFENTRYTITLE>pg_lo_creat</REFENTRYTITLE>
<REFMISCINFO>PGTCL - Large Objects</REFMISCINFO>
</REFMETA>
<REFNAMEDIV>
<REFNAME>pg_lo_creat
</REFNAME>
<REFPURPOSE>create a large object
</REFPURPOSE>
<INDEXTERM ID="IX-PGTCL-PGLOCREAT-1"><PRIMARY>pgtcl</PRIMARY><SECONDARY>creating</SECONDARY></INDEXTERM>
<INDEXTERM ID="IX-PGTCL-PGLOCREAT-2"><PRIMARY>pg_lo_creat</PRIMARY></INDEXTERM>
</REFNAMEDIV>
<REFSYNOPSISDIV>
<REFSYNOPSISDIVINFO>
<DATE>1997-12-24</DATE>
</REFSYNOPSISDIVINFO>
<SYNOPSIS>
pg_lo_creat <REPLACEABLE CLASS="PARAMETER">conn</REPLACEABLE> <REPLACEABLE CLASS="PARAMETER">mode</REPLACEABLE>
</SYNOPSIS>

<REFSECT2 ID="R2-PGTCL-PGLOCREAT-1">
<REFSECT2INFO>
<DATE>1997-12-24</DATE>
</REFSECT2INFO>
<TITLE>Inputs
</TITLE>
<VARIABLELIST>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">conn</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>Specifies a valid database connection.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">mode</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>Specifies the access mode for the large object</PARA>
</LISTITEM>
</VARLISTENTRY>
</VARIABLELIST>
</REFSECT2>

<REFSECT2 ID="R2-PGTCL-PGLOCREAT-2">
<REFSECT2INFO>
<DATE>1997-12-24</DATE>
</REFSECT2INFO>
<TITLE>Outputs
</TITLE>
<VARIABLELIST>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">objOid</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>
The oid of the large object created.
</PARA>
</LISTITEM>
</VARLISTENTRY>
</VARIABLELIST>
</REFSECT2>
</REFSYNOPSISDIV>

<REFSECT1 ID="R1-PGTCL-PGLOCREAT-1">
<REFSECT1INFO>
<DATE>1997-12-24</DATE>
</REFSECT1INFO>
<TITLE>Description
</TITLE>
<PARA><FUNCTION>pg_lo_creat</FUNCTION> creates an Inversion Large Object.
</PARA>
</REFSECT1>
<REFSECT1 ID="R1-PGTCL-PGLOCREAT-2">
<TITLE>Usage
</TITLE>
<PARA>
mode can be any OR'ing together of INV_READ, INV_WRITE, and INV_ARCHIVE. 
The OR delimiter character is "|".
<ProgramListing>
[pg_lo_creat $conn "INV_READ|INV_WRITE"]
</ProgramListing>
</PARA>
</REFSECT1>
</REFENTRY>

<!-- ********************************************************** -->

1148
<REFENTRY ID="PGTCL-PGLOOPEN">
1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245
<REFMETA>
<REFENTRYTITLE>pg_lo_open</REFENTRYTITLE>
<REFMISCINFO>PGTCL - Large Objects</REFMISCINFO>
</REFMETA>
<REFNAMEDIV>
<REFNAME>pg_lo_open
</REFNAME>
<REFPURPOSE>open a large object
</REFPURPOSE>
<INDEXTERM ID="IX-PGTCL-PGLOOPEN-1"><PRIMARY>pgtcl</PRIMARY><SECONDARY>opening</SECONDARY></INDEXTERM>
<INDEXTERM ID="IX-PGTCL-PGLOOPEN-2"><PRIMARY>pg_lo_open</PRIMARY></INDEXTERM>
</REFNAMEDIV>
<REFSYNOPSISDIV>
<REFSYNOPSISDIVINFO>
<DATE>1997-12-24</DATE>
</REFSYNOPSISDIVINFO>
<SYNOPSIS>
pg_lo_open <REPLACEABLE CLASS="PARAMETER">conn</REPLACEABLE> <REPLACEABLE CLASS="PARAMETER">objOid</REPLACEABLE> <REPLACEABLE CLASS="PARAMETER">mode</REPLACEABLE>
</SYNOPSIS>

<REFSECT2 ID="R2-PGTCL-PGLOOPEN-1">
<REFSECT2INFO>
<DATE>1997-12-24</DATE>
</REFSECT2INFO>
<TITLE>Inputs
</TITLE>
<VARIABLELIST>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">conn</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>Specifies a valid database connection.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">objOid</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>Specifies a valid large object oid.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">mode</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>Specifies the access mode for the large object</PARA>
</LISTITEM>
</VARLISTENTRY>
</VARIABLELIST>
</REFSECT2>

<REFSECT2 ID="R2-PGTCL-PGLOOPEN-2">
<REFSECT2INFO>
<DATE>1997-12-24</DATE>
</REFSECT2INFO>
<TITLE>Outputs
</TITLE>
<VARIABLELIST>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">fd</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>
A file descriptor for use in later pg_lo* routines.
</PARA>
</LISTITEM>
</VARLISTENTRY>
</VARIABLELIST>
</REFSECT2>
</REFSYNOPSISDIV>

<REFSECT1 ID="R1-PGTCL-PGLOOPEN-1">
<REFSECT1INFO>
<DATE>1997-12-24</DATE>
</REFSECT1INFO>
<TITLE>Description
</TITLE>
<PARA><FUNCTION>pg_lo_open</FUNCTION> open an Inversion Large Object.
</PARA>
</REFSECT1>
<REFSECT1 ID="R1-PGTCL-PGLOOPEN-2">
<TITLE>Usage
</TITLE>
<PARA>
Mode can be either "r", "w", or "rw".
</PARA>
</REFSECT1>
</REFENTRY>

<!-- ********************************************************** -->

1246
<REFENTRY ID="PGTCL-PGLOCLOSE">
1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324
<REFMETA>
<REFENTRYTITLE>pg_lo_close</REFENTRYTITLE>
<REFMISCINFO>PGTCL - Large Objects</REFMISCINFO>
</REFMETA>
<REFNAMEDIV>
<REFNAME>pg_lo_close
</REFNAME>
<REFPURPOSE>close a large object
</REFPURPOSE>
<INDEXTERM ID="IX-PGTCL-PGLOCLOSE-1"><PRIMARY>pgtcl</PRIMARY><SECONDARY>closing</SECONDARY></INDEXTERM>
<INDEXTERM ID="IX-PGTCL-PGLOCLOSE-2"><PRIMARY>pg_lo_close</PRIMARY></INDEXTERM>
</REFNAMEDIV>
<REFSYNOPSISDIV>
<REFSYNOPSISDIVINFO>
<DATE>1997-12-24</DATE>
</REFSYNOPSISDIVINFO>
<SYNOPSIS>
pg_lo_close <REPLACEABLE CLASS="PARAMETER">conn</REPLACEABLE> <REPLACEABLE CLASS="PARAMETER">fd</REPLACEABLE>
</SYNOPSIS>

<REFSECT2 ID="R2-PGTCL-PGLOCLOSE-1">
<REFSECT2INFO>
<DATE>1997-12-24</DATE>
</REFSECT2INFO>
<TITLE>Inputs
</TITLE>
<VARIABLELIST>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">conn</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>Specifies a valid database connection.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">fd</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>
A file descriptor for use in later pg_lo* routines.
</PARA>
</LISTITEM>
</VARLISTENTRY>
</VARIABLELIST>
</REFSECT2>

<REFSECT2 ID="R2-PGTCL-PGLOCLOSE-2">
<REFSECT2INFO>
<DATE>1997-12-24</DATE>
</REFSECT2INFO>
<TITLE>Outputs
</TITLE>
<PARA>None</PARA>
</REFSECT2>
</REFSYNOPSISDIV>

<REFSECT1 ID="R1-PGTCL-PGLOCLOSE-1">
<REFSECT1INFO>
<DATE>1997-12-24</DATE>
</REFSECT1INFO>
<TITLE>Description
</TITLE>
<PARA><FUNCTION>pg_lo_close</FUNCTION> closes an Inversion Large Object.
</PARA>
</REFSECT1>
<REFSECT1 ID="R1-PGTCL-PGLOCLOSE-2">
<TITLE>Usage
</TITLE>
<PARA>
</PARA>
</REFSECT1>
</REFENTRY>

<!-- ********************************************************** -->

1325
<REFENTRY ID="PGTCL-PGLOREAD">
1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423
<REFMETA>
<REFENTRYTITLE>pg_lo_read</REFENTRYTITLE>
<REFMISCINFO>PGTCL - Large Objects</REFMISCINFO>
</REFMETA>
<REFNAMEDIV>
<REFNAME>pg_lo_read
</REFNAME>
<REFPURPOSE>read a large object
</REFPURPOSE>
<INDEXTERM ID="IX-PGTCL-PGLOREAD-1"><PRIMARY>pgtcl</PRIMARY><SECONDARY>reading</SECONDARY></INDEXTERM>
<INDEXTERM ID="IX-PGTCL-PGLOREAD-2"><PRIMARY>pg_lo_read</PRIMARY></INDEXTERM>
</REFNAMEDIV>
<REFSYNOPSISDIV>
<REFSYNOPSISDIVINFO>
<DATE>1997-12-24</DATE>
</REFSYNOPSISDIVINFO>
<SYNOPSIS>
pg_lo_read <REPLACEABLE CLASS="PARAMETER">conn</REPLACEABLE> <REPLACEABLE CLASS="PARAMETER">fd</REPLACEABLE> <REPLACEABLE CLASS="PARAMETER">bufVar</REPLACEABLE> <REPLACEABLE CLASS="PARAMETER">len</REPLACEABLE>
</SYNOPSIS>

<REFSECT2 ID="R2-PGTCL-PGLOREAD-1">
<REFSECT2INFO>
<DATE>1997-12-24</DATE>
</REFSECT2INFO>
<TITLE>Inputs
</TITLE>
<VARIABLELIST>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">conn</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>Specifies a valid database connection.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">fd</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>
File descriptor for the large object from pg_lo_open.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">bufVar</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>Specifies a valid buffer variable to contain the large object segment.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">len</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>Specifies the maximum allowable size of the large object segment.</PARA>
</LISTITEM>
</VARLISTENTRY>
</VARIABLELIST>
</REFSECT2>

<REFSECT2 ID="R2-PGTCL-PGLOREAD-2">
<REFSECT2INFO>
<DATE>1997-12-24</DATE>
</REFSECT2INFO>
<TITLE>Outputs
</TITLE>
<PARA>None</PARA>
</REFSECT2>
</REFSYNOPSISDIV>

<REFSECT1 ID="R1-PGTCL-PGLOREAD-1">
<REFSECT1INFO>
<DATE>1997-12-24</DATE>
</REFSECT1INFO>
<TITLE>Description
</TITLE>
<PARA><FUNCTION>pg_lo_read</FUNCTION> reads 
at most <REPLACEABLE CLASS="PARAMETER">len</REPLACEABLE> bytes from a large object into a variable
 named <REPLACEABLE CLASS="PARAMETER">bufVar</REPLACEABLE>.
</PARA>
</REFSECT1>
<REFSECT1 ID="R1-PGTCL-PGLOREAD-2">
<TITLE>Usage
</TITLE>
<PARA>
<REPLACEABLE CLASS="PARAMETER">bufVar</REPLACEABLE> must be a valid variable name.
</PARA>
</REFSECT1>
</REFENTRY>

<!-- ********************************************************** -->

1424
<REFENTRY ID="PGTCL-PGLOWRITE">
1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523
<REFMETA>
<REFENTRYTITLE>pg_lo_write</REFENTRYTITLE>
<REFMISCINFO>PGTCL - Large Objects</REFMISCINFO>
</REFMETA>
<REFNAMEDIV>
<REFNAME>pg_lo_write
</REFNAME>
<REFPURPOSE>write a large object
</REFPURPOSE>
<INDEXTERM ID="IX-PGTCL-PGLOWRITE-1"><PRIMARY>pgtcl</PRIMARY><SECONDARY>writing</SECONDARY></INDEXTERM>
<INDEXTERM ID="IX-PGTCL-PGLOWRITE-2"><PRIMARY>pg_lo_write</PRIMARY></INDEXTERM>
</REFNAMEDIV>
<REFSYNOPSISDIV>
<REFSYNOPSISDIVINFO>
<DATE>1997-12-24</DATE>
</REFSYNOPSISDIVINFO>
<SYNOPSIS>
pg_lo_write <REPLACEABLE CLASS="PARAMETER">conn</REPLACEABLE> <REPLACEABLE CLASS="PARAMETER">fd</REPLACEABLE> <REPLACEABLE CLASS="PARAMETER">buf</REPLACEABLE> <REPLACEABLE CLASS="PARAMETER">len</REPLACEABLE>
</SYNOPSIS>

<REFSECT2 ID="R2-PGTCL-PGLOWRITE-1">
<REFSECT2INFO>
<DATE>1997-12-24</DATE>
</REFSECT2INFO>
<TITLE>Inputs
</TITLE>
<VARIABLELIST>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">conn</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>Specifies a valid database connection.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">fd</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>
File descriptor for the large object from pg_lo_open.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">buf</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>Specifies a valid string variable to write to the large object.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">len</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>Specifies the maximum size of the string to write.</PARA>
</LISTITEM>
</VARLISTENTRY>
</VARIABLELIST>
</REFSECT2>

<REFSECT2 ID="R2-PGTCL-PGLOWRITE-2">
<REFSECT2INFO>
<DATE>1997-12-24</DATE>
</REFSECT2INFO>
<TITLE>Outputs
</TITLE>
<PARA>None</PARA>
</REFSECT2>
</REFSYNOPSISDIV>

<REFSECT1 ID="R1-PGTCL-PGLOWRITE-1">
<REFSECT1INFO>
<DATE>1997-12-24</DATE>
</REFSECT1INFO>
<TITLE>Description
</TITLE>
<PARA><FUNCTION>pg_lo_write</FUNCTION> writes 
at most <REPLACEABLE CLASS="PARAMETER">len</REPLACEABLE> bytes to a large object from a variable
 <REPLACEABLE CLASS="PARAMETER">buf</REPLACEABLE>.
</PARA>
</REFSECT1>
<REFSECT1 ID="R1-PGTCL-PGLOWRITE-2">
<TITLE>Usage
</TITLE>
<PARA>
<REPLACEABLE CLASS="PARAMETER">buf</REPLACEABLE> must be 
the actual string to write, not a variable name.
</PARA>
</REFSECT1>
</REFENTRY>

<!-- ********************************************************** -->

1524
<REFENTRY ID="PGTCL-PGLOLSEEK">
1525 1526 1527 1528 1529 1530 1531
<REFMETA>
<REFENTRYTITLE>pg_lo_lseek</REFENTRYTITLE>
<REFMISCINFO>PGTCL - Large Objects</REFMISCINFO>
</REFMETA>
<REFNAMEDIV>
<REFNAME>pg_lo_lseek
</REFNAME>
1532
<REFPURPOSE>seek to a position in a large object
1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622
</REFPURPOSE>
<INDEXTERM ID="IX-PGTCL-PGLOLSEEK-1"><PRIMARY>pgtcl</PRIMARY><SECONDARY>positioning</SECONDARY></INDEXTERM>
<INDEXTERM ID="IX-PGTCL-PGLOLSEEK-2"><PRIMARY>pg_lo_lseek</PRIMARY></INDEXTERM>
</REFNAMEDIV>
<REFSYNOPSISDIV>
<REFSYNOPSISDIVINFO>
<DATE>1997-12-24</DATE>
</REFSYNOPSISDIVINFO>
<SYNOPSIS>
pg_lo_lseek <REPLACEABLE CLASS="PARAMETER">conn</REPLACEABLE> <REPLACEABLE CLASS="PARAMETER">fd</REPLACEABLE> <REPLACEABLE CLASS="PARAMETER">offset</REPLACEABLE> <REPLACEABLE CLASS="PARAMETER">whence</REPLACEABLE>
</SYNOPSIS>

<REFSECT2 ID="R2-PGTCL-PGLOLSEEK-1">
<REFSECT2INFO>
<DATE>1997-12-24</DATE>
</REFSECT2INFO>
<TITLE>Inputs
</TITLE>
<VARIABLELIST>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">conn</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>Specifies a valid database connection.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">fd</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>
File descriptor for the large object from pg_lo_open.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">offset</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>Specifies a zero-based offset in bytes.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">whence</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA> whence can be "SEEK_CUR", "SEEK_END", or "SEEK_SET" </PARA>
</LISTITEM>
</VARLISTENTRY>
</VARIABLELIST>
</REFSECT2>

<REFSECT2 ID="R2-PGTCL-PGLOLSEEK-2">
<REFSECT2INFO>
<DATE>1997-12-24</DATE>
</REFSECT2INFO>
<TITLE>Outputs
</TITLE>
<PARA>None</PARA>
</REFSECT2>
</REFSYNOPSISDIV>

<REFSECT1 ID="R1-PGTCL-PGLOLSEEK-1">
<REFSECT1INFO>
<DATE>1997-12-24</DATE>
</REFSECT1INFO>
<TITLE>Description
</TITLE>
<PARA><FUNCTION>pg_lo_lseek</FUNCTION> positions 
to <REPLACEABLE CLASS="PARAMETER">offset</REPLACEABLE> bytes from the beginning of the large object.
</PARA>
</REFSECT1>
<REFSECT1 ID="R1-PGTCL-PGLOLSEEK-2">
<TITLE>Usage
</TITLE>
<PARA>
<REPLACEABLE CLASS="PARAMETER">whence</REPLACEABLE> 
can be "SEEK_CUR", "SEEK_END", or "SEEK_SET".
</PARA>
</REFSECT1>
</REFENTRY>

<!-- ********************************************************** -->

1623
<REFENTRY ID="PGTCL-PGLOTELL">
1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712
<REFMETA>
<REFENTRYTITLE>pg_lo_tell</REFENTRYTITLE>
<REFMISCINFO>PGTCL - Large Objects</REFMISCINFO>
</REFMETA>
<REFNAMEDIV>
<REFNAME>pg_lo_tell
</REFNAME>
<REFPURPOSE>return the current seek position of a large object
</REFPURPOSE>
<INDEXTERM ID="IX-PGTCL-PGLOTELL-1"><PRIMARY>pgtcl</PRIMARY><SECONDARY>positioning</SECONDARY></INDEXTERM>
<INDEXTERM ID="IX-PGTCL-PGLOTELL-2"><PRIMARY>pg_lo_tell</PRIMARY></INDEXTERM>
</REFNAMEDIV>
<REFSYNOPSISDIV>
<REFSYNOPSISDIVINFO>
<DATE>1997-12-24</DATE>
</REFSYNOPSISDIVINFO>
<SYNOPSIS>
pg_lo_tell <REPLACEABLE CLASS="PARAMETER">conn</REPLACEABLE> <REPLACEABLE CLASS="PARAMETER">fd</REPLACEABLE>
</SYNOPSIS>

<REFSECT2 ID="R2-PGTCL-PGLOTELL-1">
<REFSECT2INFO>
<DATE>1997-12-24</DATE>
</REFSECT2INFO>
<TITLE>Inputs
</TITLE>
<VARIABLELIST>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">conn</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>Specifies a valid database connection.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">fd</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>
File descriptor for the large object from pg_lo_open.
</PARA>
</LISTITEM>
</VARLISTENTRY>
</VARIABLELIST>
</REFSECT2>

<REFSECT2 ID="R2-PGTCL-PGLOTELL-2">
<REFSECT2INFO>
<DATE>1997-12-24</DATE>
</REFSECT2INFO>
<TITLE>Outputs
</TITLE>
<VARIABLELIST>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">offset</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>A zero-based offset in bytes suitable for input to <Function>pg_lo_lseek</Function>.
</PARA>
</LISTITEM>
</VARLISTENTRY>
</VARIABLELIST>
</REFSECT2>
</REFSYNOPSISDIV>

<REFSECT1 ID="R1-PGTCL-PGLOTELL-1">
<REFSECT1INFO>
<DATE>1997-12-24</DATE>
</REFSECT1INFO>
<TITLE>Description
</TITLE>
<PARA><FUNCTION>pg_lo_tell</FUNCTION> returns the current
to <REPLACEABLE CLASS="PARAMETER">offset</REPLACEABLE> in bytes from the beginning of the large object.
</PARA>
</REFSECT1>
<REFSECT1 ID="R1-PGTCL-PGLOTELL-2">
<TITLE>Usage
</TITLE>
<PARA>
</PARA>
</REFSECT1>
</REFENTRY>

<!-- ********************************************************** -->

1713
<REFENTRY ID="PGTCL-PGLOUNLINK">
1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794
<REFMETA>
<REFENTRYTITLE>pg_lo_unlink</REFENTRYTITLE>
<REFMISCINFO>PGTCL - Large Objects</REFMISCINFO>
</REFMETA>
<REFNAMEDIV>
<REFNAME>pg_lo_unlink
</REFNAME>
<REFPURPOSE>delete a large object
</REFPURPOSE>
<INDEXTERM ID="IX-PGTCL-PGLOUNLINK-1"><PRIMARY>pgtcl</PRIMARY><SECONDARY>delete</SECONDARY></INDEXTERM>
<INDEXTERM ID="IX-PGTCL-PGLOUNLINK-2"><PRIMARY>pg_lo_unlink</PRIMARY></INDEXTERM>
</REFNAMEDIV>
<REFSYNOPSISDIV>
<REFSYNOPSISDIVINFO>
<DATE>1997-12-24</DATE>
</REFSYNOPSISDIVINFO>
<SYNOPSIS>
pg_lo_unlink <REPLACEABLE CLASS="PARAMETER">conn</REPLACEABLE> <REPLACEABLE CLASS="PARAMETER">lobjId</REPLACEABLE>
</SYNOPSIS>

<REFSECT2 ID="R2-PGTCL-PGLOUNLINK-1">
<REFSECT2INFO>
<DATE>1997-12-24</DATE>
</REFSECT2INFO>
<TITLE>Inputs
</TITLE>
<VARIABLELIST>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">conn</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>Specifies a valid database connection.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">lobjId</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>
Identifier for a large object.
XXX Is this the same as objOid in other calls?? - thomas 1998-01-11
</PARA>
</LISTITEM>
</VARLISTENTRY>
</VARIABLELIST>
</REFSECT2>

<REFSECT2 ID="R2-PGTCL-PGLOUNLINK-2">
<REFSECT2INFO>
<DATE>1997-12-24</DATE>
</REFSECT2INFO>
<TITLE>Outputs
</TITLE>
<PARA>
None
</PARA>
</REFSECT2>
</REFSYNOPSISDIV>

<REFSECT1 ID="R1-PGTCL-PGLOUNLINK-1">
<REFSECT1INFO>
<DATE>1997-12-24</DATE>
</REFSECT1INFO>
<TITLE>Description
</TITLE>
<PARA><FUNCTION>pg_lo_unlink</FUNCTION> deletes the specified large object.
</PARA>
</REFSECT1>
<REFSECT1 ID="R1-PGTCL-PGLOUNLINK-2">
<TITLE>Usage
</TITLE>
<PARA>
</PARA>
</REFSECT1>
</REFENTRY>

<!-- ********************************************************** -->

1795
<REFENTRY ID="PGTCL-PGLOIMPORT">
1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877
<REFMETA>
<REFENTRYTITLE>pg_lo_import</REFENTRYTITLE>
<REFMISCINFO>PGTCL - Large Objects</REFMISCINFO>
</REFMETA>
<REFNAMEDIV>
<REFNAME>pg_lo_import
</REFNAME>
<REFPURPOSE>import a large object from a Unix file
</REFPURPOSE>
<INDEXTERM ID="IX-PGTCL-PGLOIMPORT-1"><PRIMARY>pgtcl</PRIMARY><SECONDARY>import</SECONDARY></INDEXTERM>
<INDEXTERM ID="IX-PGTCL-PGLOIMPORT-2"><PRIMARY>pg_lo_import</PRIMARY></INDEXTERM>
</REFNAMEDIV>
<REFSYNOPSISDIV>
<REFSYNOPSISDIVINFO>
<DATE>1997-12-24</DATE>
</REFSYNOPSISDIVINFO>
<SYNOPSIS>
pg_lo_import <REPLACEABLE CLASS="PARAMETER">conn</REPLACEABLE> <REPLACEABLE CLASS="PARAMETER">filename</REPLACEABLE>
</SYNOPSIS>

<REFSECT2 ID="R2-PGTCL-PGLOIMPORT-1">
<REFSECT2INFO>
<DATE>1997-12-24</DATE>
</REFSECT2INFO>
<TITLE>Inputs
</TITLE>
<VARIABLELIST>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">conn</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>Specifies a valid database connection.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">filename</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>
Unix file name.
</PARA>
</LISTITEM>
</VARLISTENTRY>
</VARIABLELIST>
</REFSECT2>

<REFSECT2 ID="R2-PGTCL-PGLOIMPORT-2">
<REFSECT2INFO>
<DATE>1997-12-24</DATE>
</REFSECT2INFO>
<TITLE>Outputs
</TITLE>
<PARA>
None
XXX Does this return a lobjId? Is that the same as the objOid in other calls? thomas - 1998-01-11
</PARA>
</REFSECT2>
</REFSYNOPSISDIV>

<REFSECT1 ID="R1-PGTCL-PGLOIMPORT-1">
<REFSECT1INFO>
<DATE>1997-12-24</DATE>
</REFSECT1INFO>
<TITLE>Description
</TITLE>
<PARA><FUNCTION>pg_lo_import</FUNCTION> reads the specified file and places the contents into a large object.
</PARA>
</REFSECT1>
<REFSECT1 ID="R1-PGTCL-PGLOIMPORT-2">
<TITLE>Usage
</TITLE>
<PARA>
  <Function>pg_lo_import</Function> must be called within a BEGIN/END transaction block.
</PARA>
</REFSECT1>
</REFENTRY>

<!-- ********************************************************** -->

1878
<REFENTRY ID="PGTCL-PGLOEXPORT">
1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971
<REFMETA>
<REFENTRYTITLE>pg_lo_export</REFENTRYTITLE>
<REFMISCINFO>PGTCL - Large Objects</REFMISCINFO>
</REFMETA>
<REFNAMEDIV>
<REFNAME>pg_lo_export
</REFNAME>
<REFPURPOSE>export a large object to a Unix file
</REFPURPOSE>
<INDEXTERM ID="IX-PGTCL-PGLOEXPORT-1"><PRIMARY>pgtcl</PRIMARY><SECONDARY>export</SECONDARY></INDEXTERM>
<INDEXTERM ID="IX-PGTCL-PGLOEXPORT-2"><PRIMARY>pg_lo_export</PRIMARY></INDEXTERM>
</REFNAMEDIV>
<REFSYNOPSISDIV>
<REFSYNOPSISDIVINFO>
<DATE>1997-12-24</DATE>
</REFSYNOPSISDIVINFO>
<SYNOPSIS>
pg_lo_export <REPLACEABLE CLASS="PARAMETER">conn</REPLACEABLE> <REPLACEABLE CLASS="PARAMETER">lobjId</REPLACEABLE> <REPLACEABLE CLASS="PARAMETER">filename</REPLACEABLE>
</SYNOPSIS>

<REFSECT2 ID="R2-PGTCL-PGLOEXPORT-1">
<REFSECT2INFO>
<DATE>1997-12-24</DATE>
</REFSECT2INFO>
<TITLE>Inputs
</TITLE>
<VARIABLELIST>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">conn</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>Specifies a valid database connection.
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">lobjId</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>
Large object identifier.
XXX Is this the same as the objOid in other calls?? thomas - 1998-01-11
</PARA>
</LISTITEM>
</VARLISTENTRY>
<VARLISTENTRY>
<TERM>
  <REPLACEABLE CLASS="PARAMETER">filename</REPLACEABLE>
</TERM>
<LISTITEM>
<PARA>
Unix file name.
</PARA>
</LISTITEM>
</VARLISTENTRY>
</VARIABLELIST>
</REFSECT2>

<REFSECT2 ID="R2-PGTCL-PGLOEXPORT-2">
<REFSECT2INFO>
<DATE>1997-12-24</DATE>
</REFSECT2INFO>
<TITLE>Outputs
</TITLE>
<PARA>
None
XXX Does this return a lobjId? Is that the same as the objOid in other calls? thomas - 1998-01-11
</PARA>
</REFSECT2>
</REFSYNOPSISDIV>

<REFSECT1 ID="R1-PGTCL-PGLOEXPORT-1">
<REFSECT1INFO>
<DATE>1997-12-24</DATE>
</REFSECT1INFO>
<TITLE>Description
</TITLE>
<PARA><FUNCTION>pg_lo_export</FUNCTION> writes the specified large object into a Unix file.
</PARA>
</REFSECT1>
<REFSECT1 ID="R1-PGTCL-PGLOEXPORT-2">
<TITLE>Usage
</TITLE>
<PARA>
  <Function>pg_lo_export</Function> must be called within a BEGIN/END transaction block.
</PARA>
</REFSECT1>
</REFENTRY>

</Sect1>
</Chapter>