diff options
Diffstat (limited to 'doc/src/sgml/ref/create_function.sgml')
| -rw-r--r-- | doc/src/sgml/ref/create_function.sgml | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/doc/src/sgml/ref/create_function.sgml b/doc/src/sgml/ref/create_function.sgml index c0adb8cf1e6..06be04eb5c5 100644 --- a/doc/src/sgml/ref/create_function.sgml +++ b/doc/src/sgml/ref/create_function.sgml @@ -545,8 +545,11 @@ CREATE [ OR REPLACE ] FUNCTION as for the <xref linkend="sql-load"/> command. The string <replaceable class="parameter">link_symbol</replaceable> is the function's link symbol, that is, the name of the function in the C - language source code. If the link symbol is omitted, it is assumed - to be the same as the name of the SQL function being defined. + language source code. If the link symbol is omitted, it is assumed to + be the same as the name of the SQL function being defined. The C names + of all functions must be different, so you must give overloaded C + functions different C names (for example, use the argument types as + part of the C names). </para> <para> @@ -575,10 +578,9 @@ CREATE [ OR REPLACE ] FUNCTION <productname>PostgreSQL</productname> allows function <firstterm>overloading</firstterm>; that is, the same name can be used for several different functions so long as they have distinct - input argument types. However, the C names of all functions must be - different, so you must give overloaded C functions different C - names (for example, use the argument types as part of the C - names). + input argument types. Whether or not you use it, this capability entails + security precautions when calling functions in databases where some users + mistrust other users; see <xref linkend="typeconv-func"/>. </para> <para> |