diff options
| author | Bruce Momjian | 2008-06-23 21:10:49 +0000 |
|---|---|---|
| committer | Bruce Momjian | 2008-06-23 21:10:49 +0000 |
| commit | 804afb833eb2f9678d21e9ccc06435e40c062ba3 (patch) | |
| tree | d6697f099c186b05a0d706ea0a6952b5fe449787 | |
| parent | e97356acf4a8275f3684d4c2317d6588f46bb41f (diff) | |
Add libpq comment about how to determine the format used for passing
binary values.
Add comments to libpq C function for parameter passing.
| -rw-r--r-- | doc/src/sgml/libpq.sgml | 8 | ||||
| -rw-r--r-- | src/interfaces/libpq/fe-exec.c | 4 |
2 files changed, 11 insertions, 1 deletions
diff --git a/doc/src/sgml/libpq.sgml b/doc/src/sgml/libpq.sgml index a052150520..5c2db0ef81 100644 --- a/doc/src/sgml/libpq.sgml +++ b/doc/src/sgml/libpq.sgml @@ -1397,6 +1397,14 @@ PGresult *PQexecParams(PGconn *conn, If the array pointer is null then all parameters are presumed to be text strings. </para> + <para> + Values passed in binary format require knowlege of + the internal representation expected by the backend. + For example, integers must be passed in network byte + order. Passing <type>numeric</> values requires + knowledge of the server storage format, as implemented + in <filename>src/backend/utils/adt/numeric.c</>. + </para> </listitem> </varlistentry> diff --git a/src/interfaces/libpq/fe-exec.c b/src/interfaces/libpq/fe-exec.c index 97bfcf990f..37f3f9946e 100644 --- a/src/interfaces/libpq/fe-exec.c +++ b/src/interfaces/libpq/fe-exec.c @@ -976,12 +976,13 @@ PQsendQueryGuts(PGconn *conn, goto sendFailed; } - /* construct the Bind message */ + /* Construct the Bind message */ if (pqPutMsgStart('B', false, conn) < 0 || pqPuts("", conn) < 0 || pqPuts(stmtName, conn) < 0) goto sendFailed; + /* Send parameter formats */ if (nParams > 0 && paramFormats) { if (pqPutInt(nParams, 2, conn) < 0) @@ -1001,6 +1002,7 @@ PQsendQueryGuts(PGconn *conn, if (pqPutInt(nParams, 2, conn) < 0) goto sendFailed; + /* Send parameters */ for (i = 0; i < nParams; i++) { if (paramValues && paramValues[i]) |