Force some system catalog table columns to be marked NOT NULL.

In a manual pass over the catalog declaration I found a number of
columns which the boostrap automatism didn't mark NOT NULL even though
they actually were. Add BKI_FORCE_NOT_NULL markings to them.

It's usually not critical if a system table column is falsely determined
to be nullable as the code should always catch relevant cases. But it's
good to have a extra layer in place.

Discussion: 20150215170014.GE15326@awork2.anarazel.de

src/include/catalog/pg_description.h

@@ -52,7 +52,7 @@ CATALOG(pg_description,2609) BKI_WITHOUT_OIDS
 	int32		objsubid;		/* column number, or 0 if not used */
 
 #ifdef CATALOG_VARLEN			/* variable-length fields start here */
-	text		description;	/* description of object */
+	text		description BKI_FORCE_NOT_NULL;	/* description of object */
 #endif
 } FormData_pg_description;
 

src/include/catalog/pg_extension.h

@@ -36,8 +36,8 @@ CATALOG(pg_extension,3079)
 	bool		extrelocatable; /* if true, allow ALTER EXTENSION SET SCHEMA */
 
 #ifdef CATALOG_VARLEN			/* variable-length fields start here */
-	/* extversion should never be null, but the others can be. */
-	text		extversion;		/* extension version name */
+	/* extversion may never be null, but the others can be. */
+	text		extversion BKI_FORCE_NOT_NULL;		/* extension version name */
 	Oid			extconfig[1];	/* dumpable configuration tables */
 	text		extcondition[1];	/* WHERE clauses for config tables */
 #endif

src/include/catalog/pg_largeobject.h

@@ -34,7 +34,7 @@ CATALOG(pg_largeobject,2613) BKI_WITHOUT_OIDS
 	int32		pageno;			/* Page number (starting from 0) */
 
 	/* data has variable length, but we allow direct access; see inv_api.c */
-	bytea		data;			/* Data for page (may be zero-length) */
+	bytea		data BKI_FORCE_NOT_NULL; /* Data for page (may be zero-length) */
 } FormData_pg_largeobject;
 
 /* ----------------

src/include/catalog/pg_pltemplate.h

@@ -35,10 +35,10 @@ CATALOG(pg_pltemplate,1136) BKI_SHARED_RELATION BKI_WITHOUT_OIDS
 	bool		tmpldbacreate;	/* PL is installable by db owner? */
 
 #ifdef CATALOG_VARLEN			/* variable-length fields start here */
-	text		tmplhandler;	/* name of call handler function */
+	text		tmplhandler BKI_FORCE_NOT_NULL;	/* name of call handler function */
 	text		tmplinline;		/* name of anonymous-block handler, or NULL */
 	text		tmplvalidator;	/* name of validator function, or NULL */
-	text		tmpllibrary;	/* path of shared library */
+	text		tmpllibrary BKI_FORCE_NOT_NULL;	/* path of shared library */
 	aclitem		tmplacl[1];		/* access privileges for template */
 #endif
 } FormData_pg_pltemplate;

src/include/catalog/pg_proc.h

@@ -66,7 +66,7 @@ CATALOG(pg_proc,1255) BKI_BOOTSTRAP BKI_ROWTYPE_OID(81) BKI_SCHEMA_MACRO
 	text		proargnames[1]; /* parameter names (NULL if no names) */
 	pg_node_tree proargdefaults;/* list of expression trees for argument
 								 * defaults (NULL if none) */
-	text		prosrc;			/* procedure source text */
+	text		prosrc BKI_FORCE_NOT_NULL; /* procedure source text */
 	text		probin;			/* secondary procedure info (can be NULL) */
 	text		proconfig[1];	/* procedure-local GUC settings */
 	aclitem		proacl[1];		/* access permissions */

src/include/catalog/pg_seclabel.h

@@ -27,8 +27,8 @@ CATALOG(pg_seclabel,3596) BKI_WITHOUT_OIDS
 	int32		objsubid;		/* column number, or 0 if not used */
 
 #ifdef CATALOG_VARLEN			/* variable-length fields start here */
-	text		provider;		/* name of label provider */
-	text		label;			/* security label of the object */
+	text		provider BKI_FORCE_NOT_NULL; /* name of label provider */
+	text		label BKI_FORCE_NOT_NULL; /* security label of the object */
 #endif
 } FormData_pg_seclabel;
 

src/include/catalog/pg_shdescription.h

@@ -44,7 +44,7 @@ CATALOG(pg_shdescription,2396) BKI_SHARED_RELATION BKI_WITHOUT_OIDS
 	Oid			classoid;		/* OID of table containing object */
 
 #ifdef CATALOG_VARLEN			/* variable-length fields start here */
-	text		description;	/* description of object */
+	text		description BKI_FORCE_NOT_NULL; /* description of object */
 #endif
 } FormData_pg_shdescription;
 

src/include/catalog/pg_shseclabel.h

@@ -26,8 +26,8 @@ CATALOG(pg_shseclabel,3592) BKI_SHARED_RELATION BKI_WITHOUT_OIDS
 	Oid			classoid;		/* OID of table containing the shared object */
 
 #ifdef CATALOG_VARLEN			/* variable-length fields start here */
-	text		provider;		/* name of label provider */
-	text		label;			/* security label of the object */
+	text		provider BKI_FORCE_NOT_NULL; /* name of label provider */
+	text		label BKI_FORCE_NOT_NULL; /* security label of the object */
 #endif
 } FormData_pg_shseclabel;
 

src/include/catalog/pg_trigger.h

@@ -57,7 +57,7 @@ CATALOG(pg_trigger,2620)
 	int2vector	tgattr;			/* column numbers, if trigger is on columns */
 
 #ifdef CATALOG_VARLEN
-	bytea		tgargs;			/* first\000second\000tgnargs\000 */
+	bytea		tgargs BKI_FORCE_NOT_NULL; /* first\000second\000tgnargs\000 */
 	pg_node_tree tgqual;		/* WHEN expression, or NULL if none */
 #endif
 } FormData_pg_trigger;