CData: added a cast to double precision.

[postrr.git] / src / cdata.c

diff --git a/src/cdata.c b/src/cdata.c
index 32e8e4d0b8dbad51c5ec428d95b70543faefeca6..03fefbc6c510f45556c76237472c1139895e7365 100644 (file)
--- a/src/cdata.c
+++ b/src/cdata.c
@@ -79,6 +79,7 @@ PG_FUNCTION_INFO_V1(cdata_typmodout);
 
 PG_FUNCTION_INFO_V1(cdata_to_cdata);
 PG_FUNCTION_INFO_V1(int32_to_cdata);
+PG_FUNCTION_INFO_V1(cdata_to_float8);
 
 PG_FUNCTION_INFO_V1(cdata_update);
 
@@ -331,6 +332,21 @@ int32_to_cdata(PG_FUNCTION_ARGS)
        PG_RETURN_CDATA_P(data);
 } /* int32_to_cdata */
 
+Datum
+cdata_to_float8(PG_FUNCTION_ARGS)
+{
+       cdata_t *data;
+
+       if (PG_NARGS() != 1)
+               ereport(ERROR, (
+                                       errmsg("cdata_to_float8() expects one argument"),
+                                       errhint("Usage: cdata_to_float8(cdata)")
+                               ));
+
+       data = PG_GETARG_CDATA_P(0);
+       PG_RETURN_FLOAT8(data->value);
+} /* cdata_to_float8 */
+
 Datum
 cdata_update(PG_FUNCTION_ARGS)
 {