Make more use of makeColumnDef()

Since we already have it, we might as well make full use of it,
instead of assembling ColumnDef by hand in several places.

Reviewed-by: Alvaro Herrera <alvherre@alvh.no-ip.org>
Discussion: https://www.postgresql.org/message-id/flat/52a125e4-ff9a-95f5-9f61-b87cf447e4da@eisentraut.org

src/backend/commands/sequence.c

@@ -172,40 +172,27 @@ DefineSequence(ParseState *pstate, CreateSeqStmt *seq)
 	stmt->tableElts = NIL;
 	for (i = SEQ_COL_FIRSTCOL; i <= SEQ_COL_LASTCOL; i++)
 	{
-		ColumnDef  *coldef = makeNode(ColumnDef);
+		ColumnDef  *coldef;
-
-		coldef->inhcount = 0;
-		coldef->is_local = true;
-		coldef->is_not_null = true;
-		coldef->is_from_type = false;
-		coldef->storage = 0;
-		coldef->raw_default = NULL;
-		coldef->cooked_default = NULL;
-		coldef->collClause = NULL;
-		coldef->collOid = InvalidOid;
-		coldef->constraints = NIL;
-		coldef->location = -1;
-
-		null[i - 1] = false;
 
 		switch (i)
 		{
 			case SEQ_COL_LASTVAL:
-				coldef->typeName = makeTypeNameFromOid(INT8OID, -1);
+				coldef = makeColumnDef("last_value", INT8OID, -1, InvalidOid);
-				coldef->colname = "last_value";
 				value[i - 1] = Int64GetDatumFast(seqdataform.last_value);
 				break;
 			case SEQ_COL_LOG:
-				coldef->typeName = makeTypeNameFromOid(INT8OID, -1);
+				coldef = makeColumnDef("log_cnt", INT8OID, -1, InvalidOid);
-				coldef->colname = "log_cnt";
 				value[i - 1] = Int64GetDatum((int64) 0);
 				break;
 			case SEQ_COL_CALLED:
-				coldef->typeName = makeTypeNameFromOid(BOOLOID, -1);
+				coldef = makeColumnDef("is_called", BOOLOID, -1, InvalidOid);
-				coldef->colname = "is_called";
 				value[i - 1] = BoolGetDatum(false);
 				break;
 		}
+
+		coldef->is_not_null = true;
+		null[i - 1] = false;
+
 		stmt->tableElts = lappend(stmt->tableElts, coldef);
 	}
 

src/backend/commands/tablecmds.c

@@ -2755,10 +2755,8 @@ MergeAttributes(List *schema, List *supers, char relpersistence,
 				/*
 				 * No, create a new inherited column
 				 */
-				def = makeNode(ColumnDef);
+				def = makeColumnDef(attributeName, attribute->atttypid,
-				def->colname = pstrdup(attributeName);
+									attribute->atttypmod, attribute->attcollation);
-				def->typeName = makeTypeNameFromOid(attribute->atttypid,
-													attribute->atttypmod);
 				def->inhcount = 1;
 				def->is_local = false;
 				/* mark attnotnull if parent has it and it's not NO INHERIT */
@@ -2766,20 +2764,11 @@ MergeAttributes(List *schema, List *supers, char relpersistence,
 					bms_is_member(parent_attno - FirstLowInvalidHeapAttributeNumber,
 								  pkattrs))
 					def->is_not_null = true;
-				def->is_from_type = false;
 				def->storage = attribute->attstorage;
-				def->raw_default = NULL;
-				def->cooked_default = NULL;
 				def->generated = attribute->attgenerated;
-				def->collClause = NULL;
-				def->collOid = attribute->attcollation;
-				def->constraints = NIL;
-				def->location = -1;
 				if (CompressionMethodIsValid(attribute->attcompression))
 					def->compression =
 						pstrdup(GetCompressionMethodName(attribute->attcompression));
-				else
-					def->compression = NULL;
 				inhSchema = lappend(inhSchema, def);
 				newattmap->attnums[parent_attno - 1] = ++child_attno;
 

src/backend/parser/parse_utilcmd.c

@@ -1066,7 +1066,6 @@ transformTableLikeClause(CreateStmtContext *cxt, TableLikeClause *table_like_cla
 	{
 		Form_pg_attribute attribute = TupleDescAttr(tupleDesc,
 													parent_attno - 1);
-		char	   *attributeName = NameStr(attribute->attname);
 		ColumnDef  *def;
 
 		/*
@@ -1076,29 +1075,18 @@ transformTableLikeClause(CreateStmtContext *cxt, TableLikeClause *table_like_cla
 			continue;
 
 		/*
-		 * Create a new column, which is marked as NOT inherited.
+		 * Create a new column definition
-		 *
+		 */
+		def = makeColumnDef(NameStr(attribute->attname), attribute->atttypid,
+							attribute->atttypmod, attribute->attcollation);
+
+		/*
 		 * For constraints, ONLY the not-null constraint is inherited by the
 		 * new column definition per SQL99; however we cannot do that
 		 * correctly here, so we leave it for expandTableLikeClause to handle.
 		 */
-		def = makeNode(ColumnDef);
-		def->colname = pstrdup(attributeName);
-		def->typeName = makeTypeNameFromOid(attribute->atttypid,
-											attribute->atttypmod);
-		def->inhcount = 0;
-		def->is_local = true;
-		def->is_not_null = false;
 		if (attribute->attnotnull)
 			process_notnull_constraints = true;
-		def->is_from_type = false;
-		def->storage = 0;
-		def->raw_default = NULL;
-		def->cooked_default = NULL;
-		def->collClause = NULL;
-		def->collOid = attribute->attcollation;
-		def->constraints = NIL;
-		def->location = -1;
 
 		/*
 		 * Add to column list
@@ -1635,20 +1623,10 @@ transformOfType(CreateStmtContext *cxt, TypeName *ofTypename)
 		if (attr->attisdropped)
 			continue;
 
-		n = makeNode(ColumnDef);
+		n = makeColumnDef(NameStr(attr->attname), attr->atttypid,
-		n->colname = pstrdup(NameStr(attr->attname));
+						  attr->atttypmod, attr->attcollation);
-		n->typeName = makeTypeNameFromOid(attr->atttypid, attr->atttypmod);
-		n->inhcount = 0;
-		n->is_local = true;
-		n->is_not_null = false;
 		n->is_from_type = true;
-		n->storage = 0;
+
-		n->raw_default = NULL;
-		n->cooked_default = NULL;
-		n->collClause = NULL;
-		n->collOid = attr->attcollation;
-		n->constraints = NIL;
-		n->location = -1;
 		cxt->columns = lappend(cxt->columns, n);
 	}
 	ReleaseTupleDesc(tupdesc);