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72 lines
1.6 KiB
Plaintext
72 lines
1.6 KiB
Plaintext
/*
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* This sample show howto use asynchronous/nonblocking queries
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*/
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#require "hbpgsql"
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#include "inkey.ch"
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PROCEDURE Main( cServer, cDatabase, cUser, cPass )
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LOCAL conn
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CLS
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? "Connect", conn := PQconnectdb( "dbname = " + cDatabase + " host = " + cServer + " user = " + cUser + " password = " + cPass + " port = 5432" )
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? "Conection status", PQerrorMessage( conn ), PQstatus( conn )
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Query( conn, "SELECT codigo, descri FROM client limit 100", .F. )
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Query( conn, "SELECT codigo, descri FROM fornec limit 100", .F. )
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Query( conn, "SELECT pedido, vlrped FROM pedido", .T. )
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RETURN
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PROCEDURE Query( conn, cQuery, lCancel )
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LOCAL pCancel, cErrMsg := Space( 30 )
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LOCAL res, x, y, cTime
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? "PQSendQuery", PQsendQuery( conn, cQuery )
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cTime := Time()
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CLEAR TYPEAHEAD
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DO WHILE Inkey() != K_ESC
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DevPos( Row(), 20 )
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DevOut( "Processing: " + ElapTime( cTime, Time() ) )
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Inkey( 1 )
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IF lCancel
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IF .T.
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pCancel := PQgetCancel( conn )
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? "Canceled: ", PQcancel( pCancel, @cErrMsg ), cErrMsg
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pCancel := NIL
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ELSE
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? PQrequestCancel( conn ) /* Deprecated */
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ENDIF
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ENDIF
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IF PQconsumeInput( conn )
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IF ! PQisBusy( conn )
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EXIT
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ENDIF
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ENDIF
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ENDDO
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IF Inkey() != K_ESC
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? "PQgetResult", hb_ValToExp( res := PQgetResult( conn ) )
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FOR x := 1 TO PQlastrec( res )
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?
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FOR y := 1 TO PQfcount( res )
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?? PQgetvalue( res, x, y ), " "
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NEXT
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NEXT
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ELSE
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? "Canceling Query", PQrequestCancel( conn )
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ENDIF
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RETURN
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