Hello,

bmomjian · bmomjian · commit 3f5a1643879f · 1999-09-27T19:16:29.000Z
Two patches included:
- the first one enables the use of bool variables in fields which might
become NULL.
  Up to now the lib told you that NULL is not a bool variable, even if
you provide a indicator.

- the second patch checks whether a value is null and issues an error if
no indicator is provided.

Sidenote: IIRC, the variable should be left alone if the value is NULL.
ECPGlib sets it's value to 0 on NULL. Is this a violation of the
standard?

Regards
     Christof
diff --git a/src/interfaces/ecpg/ChangeLog b/src/interfaces/ecpg/ChangeLog
@@ -1,3 +1,8 @@
+Tue Aug 24 15:53:28 MEST 1999
+
+	- made NULL a valid bool value
+	- check for indicator variables on NULL
+
 Wed Feb 11 10:58:13 CET 1998
 
 	- Added '-d' option to turn on debugging.
diff --git a/src/interfaces/ecpg/include/ecpgerrno.h b/src/interfaces/ecpg/include/ecpgerrno.h
@@ -22,6 +22,7 @@
 #define ECPG_FLOAT_FORMAT	-206
 #define ECPG_CONVERT_BOOL	-207
 #define ECPG_EMPTY		-208
+#define ECPG_MISSING_INDICATOR	-209
 
 #define ECPG_NO_CONN		-220
 #define ECPG_NOT_CONN		-221
diff --git a/src/interfaces/ecpg/lib/ecpglib.c b/src/interfaces/ecpg/lib/ecpglib.c
@@ -766,7 +766,16 @@ ECPGexecute(struct statement * stmt)
 							case ECPGt_unsigned_long:
 								((long *) var->ind_value)[act_tuple] = -PQgetisnull(results, act_tuple, act_field);
 								break;
+							case ECPGt_NO_INDICATOR:
+								if (PQgetisnull(results, act_tuple, act_field))
+								{
+									register_error(ECPG_MISSING_INDICATOR, "NULL value without indicator variable on line %d.", stmt->lineno);
+									status = false;
+								}
+								break;
 							default:
+								register_error(ECPG_UNSUPPORTED, "Unsupported indicator type %s on line %d.", ECPGtype_name(var->ind_type), stmt->lineno);
+								status = false;
 								break;
 						}
 
@@ -891,6 +900,11 @@ ECPGexecute(struct statement * stmt)
 										((char *) var->value)[act_tuple] = true;
 										break;
 									}
+									else if (pval[0] == '\0' && PQgetisnull(results, act_tuple, act_field))
+									{
+										// NULL is valid
+										break;
+									}
 								}
 
 								register_error(ECPG_CONVERT_BOOL, "Unable to convert %s to bool on line %d.",
