Server IP : 103.119.228.120 / Your IP : 3.12.34.209 Web Server : Apache System : Linux v8.techscape8.com 3.10.0-1160.119.1.el7.tuxcare.els2.x86_64 #1 SMP Mon Jul 15 12:09:18 UTC 2024 x86_64 User : nobody ( 99) PHP Version : 5.6.40 Disable Function : shell_exec,symlink,system,exec,proc_get_status,proc_nice,proc_terminate,define_syslog_variables,syslog,openlog,closelog,escapeshellcmd,passthru,ocinum cols,ini_alter,leak,listen,chgrp,apache_note,apache_setenv,debugger_on,debugger_off,ftp_exec,dl,dll,myshellexec,proc_open,socket_bind,proc_close,escapeshellarg,parse_ini_filepopen,fpassthru,exec,passthru,escapeshellarg,escapeshellcmd,proc_close,proc_open,ini_alter,popen,show_source,proc_nice,proc_terminate,proc_get_status,proc_close,pfsockopen,leak,apache_child_terminate,posix_kill,posix_mkfifo,posix_setpgid,posix_setsid,posix_setuid,dl,symlink,shell_exec,system,dl,passthru,escapeshellarg,escapeshellcmd,myshellexec,c99_buff_prepare,c99_sess_put,fpassthru,getdisfunc,fx29exec,fx29exec2,is_windows,disp_freespace,fx29sh_getupdate,fx29_buff_prepare,fx29_sess_put,fx29shexit,fx29fsearch,fx29ftpbrutecheck,fx29sh_tools,fx29sh_about,milw0rm,imagez,sh_name,myshellexec,checkproxyhost,dosyayicek,c99_buff_prepare,c99_sess_put,c99getsource,c99sh_getupdate,c99fsearch,c99shexit,view_perms,posix_getpwuid,posix_getgrgid,posix_kill,parse_perms,parsesort,view_perms_color,set_encoder_input,ls_setcheckboxall,ls_reverse_all,rsg_read,rsg_glob,selfURL,dispsecinfo,unix2DosTime,addFile,system,get_users,view_size,DirFiles,DirFilesWide,DirPrintHTMLHeaders,GetFilesTotal,GetTitles,GetTimeTotal,GetMatchesCount,GetFileMatchesCount,GetResultFiles,fs_copy_dir,fs_copy_obj,fs_move_dir,fs_move_obj,fs_rmdir,SearchText,getmicrotime MySQL : ON | cURL : ON | WGET : ON | Perl : ON | Python : ON | Sudo : ON | Pkexec : ON Directory : /usr/local/ssl/share/doc/postgresql-9.2.24/html/ |
Upload File : |
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >libpq - C Library</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REV="MADE" HREF="mailto:pgsql-docs@postgresql.org"><LINK REL="HOME" TITLE="PostgreSQL 9.2.24 Documentation" HREF="index.html"><LINK REL="UP" TITLE="Client Interfaces" HREF="client-interfaces.html"><LINK REL="PREVIOUS" TITLE="Client Interfaces" HREF="client-interfaces.html"><LINK REL="NEXT" TITLE="Database Connection Control Functions" HREF="libpq-connect.html"><LINK REL="STYLESHEET" TYPE="text/css" HREF="stylesheet.css"><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=ISO-8859-1"><META NAME="creation" CONTENT="2017-11-06T22:43:11"></HEAD ><BODY CLASS="CHAPTER" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="5" ALIGN="center" VALIGN="bottom" ><A HREF="index.html" >PostgreSQL 9.2.24 Documentation</A ></TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A TITLE="Client Interfaces" HREF="client-interfaces.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A HREF="client-interfaces.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="60%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="20%" ALIGN="right" VALIGN="top" ><A TITLE="Database Connection Control Functions" HREF="libpq-connect.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="CHAPTER" ><H1 ><A NAME="LIBPQ" ></A >Chapter 31. <SPAN CLASS="APPLICATION" >libpq</SPAN > - C Library</H1 ><DIV CLASS="TOC" ><DL ><DT ><B >Table of Contents</B ></DT ><DT >31.1. <A HREF="libpq-connect.html" >Database Connection Control Functions</A ></DT ><DD ><DL ><DT >31.1.1. <A HREF="libpq-connect.html#LIBPQ-CONNSTRING" >Connection Strings</A ></DT ><DT >31.1.2. <A HREF="libpq-connect.html#LIBPQ-PARAMKEYWORDS" >Parameter Key Words</A ></DT ></DL ></DD ><DT >31.2. <A HREF="libpq-status.html" >Connection Status Functions</A ></DT ><DT >31.3. <A HREF="libpq-exec.html" >Command Execution Functions</A ></DT ><DD ><DL ><DT >31.3.1. <A HREF="libpq-exec.html#LIBPQ-EXEC-MAIN" >Main Functions</A ></DT ><DT >31.3.2. <A HREF="libpq-exec.html#LIBPQ-EXEC-SELECT-INFO" >Retrieving Query Result Information</A ></DT ><DT >31.3.3. <A HREF="libpq-exec.html#LIBPQ-EXEC-NONSELECT" >Retrieving Other Result Information</A ></DT ><DT >31.3.4. <A HREF="libpq-exec.html#LIBPQ-EXEC-ESCAPE-STRING" >Escaping Strings for Inclusion in SQL Commands</A ></DT ></DL ></DD ><DT >31.4. <A HREF="libpq-async.html" >Asynchronous Command Processing</A ></DT ><DT >31.5. <A HREF="libpq-single-row-mode.html" >Retrieving Query Results Row-By-Row</A ></DT ><DT >31.6. <A HREF="libpq-cancel.html" >Canceling Queries in Progress</A ></DT ><DT >31.7. <A HREF="libpq-fastpath.html" >The Fast-Path Interface</A ></DT ><DT >31.8. <A HREF="libpq-notify.html" >Asynchronous Notification</A ></DT ><DT >31.9. <A HREF="libpq-copy.html" >Functions Associated with the <TT CLASS="COMMAND" >COPY</TT > Command</A ></DT ><DD ><DL ><DT >31.9.1. <A HREF="libpq-copy.html#LIBPQ-COPY-SEND" >Functions for Sending <TT CLASS="COMMAND" >COPY</TT > Data</A ></DT ><DT >31.9.2. <A HREF="libpq-copy.html#LIBPQ-COPY-RECEIVE" >Functions for Receiving <TT CLASS="COMMAND" >COPY</TT > Data</A ></DT ><DT >31.9.3. <A HREF="libpq-copy.html#LIBPQ-COPY-DEPRECATED" >Obsolete Functions for <TT CLASS="COMMAND" >COPY</TT ></A ></DT ></DL ></DD ><DT >31.10. <A HREF="libpq-control.html" >Control Functions</A ></DT ><DT >31.11. <A HREF="libpq-misc.html" >Miscellaneous Functions</A ></DT ><DT >31.12. <A HREF="libpq-notice-processing.html" >Notice Processing</A ></DT ><DT >31.13. <A HREF="libpq-events.html" >Event System</A ></DT ><DD ><DL ><DT >31.13.1. <A HREF="libpq-events.html#LIBPQ-EVENTS-TYPES" >Event Types</A ></DT ><DT >31.13.2. <A HREF="libpq-events.html#LIBPQ-EVENTS-PROC" >Event Callback Procedure</A ></DT ><DT >31.13.3. <A HREF="libpq-events.html#LIBPQ-EVENTS-FUNCS" >Event Support Functions</A ></DT ><DT >31.13.4. <A HREF="libpq-events.html#LIBPQ-EVENTS-EXAMPLE" >Event Example</A ></DT ></DL ></DD ><DT >31.14. <A HREF="libpq-envars.html" >Environment Variables</A ></DT ><DT >31.15. <A HREF="libpq-pgpass.html" >The Password File</A ></DT ><DT >31.16. <A HREF="libpq-pgservice.html" >The Connection Service File</A ></DT ><DT >31.17. <A HREF="libpq-ldap.html" >LDAP Lookup of Connection Parameters</A ></DT ><DT >31.18. <A HREF="libpq-ssl.html" >SSL Support</A ></DT ><DD ><DL ><DT >31.18.1. <A HREF="libpq-ssl.html#LIBQ-SSL-CERTIFICATES" >Client Verification of Server Certificates</A ></DT ><DT >31.18.2. <A HREF="libpq-ssl.html#LIBPQ-SSL-CLIENTCERT" >Client Certificates</A ></DT ><DT >31.18.3. <A HREF="libpq-ssl.html#LIBPQ-SSL-PROTECTION" >Protection Provided in Different Modes</A ></DT ><DT >31.18.4. <A HREF="libpq-ssl.html#LIBPQ-SSL-FILEUSAGE" >SSL Client File Usage</A ></DT ><DT >31.18.5. <A HREF="libpq-ssl.html#LIBPQ-SSL-INITIALIZE" >SSL Library Initialization</A ></DT ></DL ></DD ><DT >31.19. <A HREF="libpq-threading.html" >Behavior in Threaded Programs</A ></DT ><DT >31.20. <A HREF="libpq-build.html" >Building <SPAN CLASS="APPLICATION" >libpq</SPAN > Programs</A ></DT ><DT >31.21. <A HREF="libpq-example.html" >Example Programs</A ></DT ></DL ></DIV ><P > <SPAN CLASS="APPLICATION" >libpq</SPAN > is the <ACRONYM CLASS="ACRONYM" >C</ACRONYM > application programmer's interface to <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN >. <SPAN CLASS="APPLICATION" >libpq</SPAN > is a set of library functions that allow client programs to pass queries to the <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN > backend server and to receive the results of these queries. </P ><P > <SPAN CLASS="APPLICATION" >libpq</SPAN > is also the underlying engine for several other <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN > application interfaces, including those written for C++, Perl, Python, Tcl and <SPAN CLASS="APPLICATION" >ECPG</SPAN >. So some aspects of <SPAN CLASS="APPLICATION" >libpq</SPAN >'s behavior will be important to you if you use one of those packages. In particular, <A HREF="libpq-envars.html" >Section 31.14</A >, <A HREF="libpq-pgpass.html" >Section 31.15</A > and <A HREF="libpq-ssl.html" >Section 31.18</A > describe behavior that is visible to the user of any application that uses <SPAN CLASS="APPLICATION" >libpq</SPAN >. </P ><P > Some short programs are included at the end of this chapter (<A HREF="libpq-example.html" >Section 31.21</A >) to show how to write programs that use <SPAN CLASS="APPLICATION" >libpq</SPAN >. There are also several complete examples of <SPAN CLASS="APPLICATION" >libpq</SPAN > applications in the directory <TT CLASS="FILENAME" >src/test/examples</TT > in the source code distribution. </P ><P > Client programs that use <SPAN CLASS="APPLICATION" >libpq</SPAN > must include the header file <TT CLASS="FILENAME" >libpq-fe.h</TT > and must link with the <SPAN CLASS="APPLICATION" >libpq</SPAN > library. </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="client-interfaces.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="libpq-connect.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Client Interfaces</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="client-interfaces.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Database Connection Control Functions</TD ></TR ></TABLE ></DIV ></BODY ></HTML >