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Commit2296e29

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Add libpq comment about how to determine the format used for passing
binary values.Add comments to libpq C function for parameter passing.
1 parent01930ce commit2296e29

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2 files changed

+13
-3
lines changed

2 files changed

+13
-3
lines changed

‎doc/src/sgml/libpq.sgml

Lines changed: 9 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,4 @@
1-
<!-- $PostgreSQL: pgsql/doc/src/sgml/libpq.sgml,v 1.258 2008/06/01 16:23:08 tgl Exp $ -->
1+
<!-- $PostgreSQL: pgsql/doc/src/sgml/libpq.sgml,v 1.259 2008/06/23 21:10:49 momjian Exp $ -->
22

33
<chapter id="libpq">
44
<title><application>libpq</application> - C Library</title>
@@ -1397,6 +1397,14 @@ PGresult *PQexecParams(PGconn *conn,
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If the array pointer is null then all parameters are presumed
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to be text strings.
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</para>
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<para>
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Values passed in binary format require knowlege of
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the internal representation expected by the backend.
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For example, integers must be passed in network byte
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order. Passing <type>numeric</> values requires
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knowledge of the server storage format, as implemented
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in <filename>src/backend/utils/adt/numeric.c</>.
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</para>
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</listitem>
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</varlistentry>
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‎src/interfaces/libpq/fe-exec.c

Lines changed: 4 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/interfaces/libpq/fe-exec.c,v 1.195 2008/05/29 22:02:44 tgl Exp $
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* $PostgreSQL: pgsql/src/interfaces/libpq/fe-exec.c,v 1.196 2008/06/23 21:10:49 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
@@ -976,12 +976,13 @@ PQsendQueryGuts(PGconn *conn,
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gotosendFailed;
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}
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979-
/*construct the Bind message */
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/*Construct the Bind message */
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if (pqPutMsgStart('B', false,conn)<0||
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pqPuts("",conn)<0||
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pqPuts(stmtName,conn)<0)
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gotosendFailed;
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/* Send parameter formats */
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if (nParams>0&&paramFormats)
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{
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if (pqPutInt(nParams,2,conn)<0)
@@ -1001,6 +1002,7 @@ PQsendQueryGuts(PGconn *conn,
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if (pqPutInt(nParams,2,conn)<0)
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gotosendFailed;
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/* Send parameters */
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for (i=0;i<nParams;i++)
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{
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if (paramValues&&paramValues[i])

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