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>Chapter 1. <SPAN
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><H1
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><A
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>1.3. <SPAN
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> Command Reference</A
></H1
><DIV
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><DL
><DT
><B
>Table of Contents</B
></DT
><DT
><A
HREF="pgtcl-pgconnect.html"
>pg_connect</A
> -- open a connection to the server</DT
><DT
><A
HREF="pgtcl-pgconninfo.html"
>pg_dbinfo</A
> -- returns a list of current open connection/result handles</DT
><DT
><A
HREF="pgtcl-pgdisconnect.html"
>pg_disconnect</A
> -- close a connection to the server</DT
><DT
><A
HREF="pgtcl-pgconndefaults.html"
>pg_conndefaults</A
> -- get connection options and their defaults</DT
><DT
><A
HREF="pgtcl-pgexec.html"
>pg_exec</A
> -- send a command to the server</DT
><DT
><A
HREF="pgtcl-pgexecprepared.html"
>pg_exec_prepared</A
> -- send a request to execute a prepared SQL statement to the server</DT
><DT
><A
HREF="pgtcl-pgresult.html"
>pg_result</A
> -- get information about a command result</DT
><DT
><A
HREF="pgtcl-pgselect.html"
>pg_select</A
> -- loop over the result of a query</DT
><DT
><A
HREF="pgtcl-pgexecute.html"
>pg_execute</A
> -- send a query and optionally loop over the results</DT
><DT
><A
HREF="pgtcl-pglisten.html"
>pg_listen</A
> -- set or change a callback for asynchronous notification messages</DT
><DT
><A
HREF="pgtcl-pgon-connection-loss.html"
>pg_on_connection_loss</A
> -- set or change a callback for unexpected connection loss</DT
><DT
><A
HREF="pgtcl-pgsendquery.html"
>pg_sendquery</A
> -- send a query string to the backend connection without waiting for a result</DT
><DT
><A
HREF="pgtcl-pgsendqueryprepared.html"
>pg_sendquery_prepared</A
> -- send a request to execute a prepared statement to the backend connection, without waiting for a result</DT
><DT
><A
HREF="pgtcl-pggetresult.html"
>pg_getresult</A
> -- process asychronous results</DT
><DT
><A
HREF="pgtcl-pgisbusy.html"
>pg_isbusy</A
> -- see if a query is busy</DT
><DT
><A
HREF="pgtcl-pgblocking.html"
>pg_blocking</A
> -- see or set whether or not a connection is set to blocking
or nonblocking</DT
><DT
><A
HREF="pgtcl-pgcancelrequest.html"
>pg_cancelrequest</A
> -- request that <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
>
abandon processing of the current command
</DT
><DT
><A
HREF="pgtcl-nullvaluestring.html"
>pg_null_value_string</A
> -- define a value to be returned for NULL fields distinct from the default value of an empty string.
</DT
><DT
><A
HREF="pgtcl-quote.html"
>pg_quote</A
> -- escapes a string for inclusion into SQL statements
</DT
><DT
><A
HREF="pgtcl-pgescape-string.html"
>pg_escape_string</A
> -- escapes a string for inclusion into SQL statements. This is the same as pg_quote. It was added for consistency.
</DT
><DT
><A
HREF="pgtcl-pgescape-bytea.html"
>pg_escape_bytea</A
> -- escapes a binary string for inclusion into SQL statements.
</DT
><DT
><A
HREF="pgtcl-pgunescape-bytea.html"
>pg_unescape_bytea</A
> -- unescapes a binary string.
</DT
><DT
><A
HREF="pgtcl-pglocreat.html"
>pg_lo_creat</A
> -- create a large object</DT
><DT
><A
HREF="pgtcl-pgloopen.html"
>pg_lo_open</A
> -- open a large object</DT
><DT
><A
HREF="pgtcl-pgloclose.html"
>pg_lo_close</A
> -- close a large object</DT
><DT
><A
HREF="pgtcl-pgloread.html"
>pg_lo_read</A
> -- read from a large object</DT
><DT
><A
HREF="pgtcl-pglowrite.html"
>pg_lo_write</A
> -- write to a large object</DT
><DT
><A
HREF="pgtcl-pglolseek.html"
>pg_lo_lseek</A
> -- seek to a position of a large object</DT
><DT
><A
HREF="pgtcl-pglotell.html"
>pg_lo_tell</A
> -- return the current seek position of a large object</DT
><DT
><A
HREF="pgtcl-pglounlink.html"
>pg_lo_unlink</A
> -- delete a large object</DT
><DT
><A
HREF="pgtcl-pgloimport.html"
>pg_lo_import</A
> -- import a large object from a file</DT
><DT
><A
HREF="pgtcl-pgloexport.html"
>pg_lo_export</A
> -- export a large object to a file</DT
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