Remove unused code.

univ.i: Do not #define YYDEBUG, because it is only useful for debugging
the grammar of the Bison-generated InnoDB SQL parser.

row_build(): Remove type==ROW_COPY_ALSO_EXTERNALS, because it is never
passed.

include/row0row.h

@@ -80,10 +80,9 @@ dtuple_t*
 row_build(
 /*======*/
 				/* out, own: row built; see the NOTE below! */
-	ulint		type,	/* in: ROW_COPY_POINTERS, ROW_COPY_DATA, or
-				ROW_COPY_ALSO_EXTERNALS,
-				the two last copy also the data fields to
-				heap as the first only places pointers to
+	ulint		type,	/* in: ROW_COPY_POINTERS or ROW_COPY_DATA;
+				the latter copies also the data fields to
+				heap while the first only places pointers to
 				data fields on the index page, and thus is
 				more efficient */
 	dict_index_t*	index,	/* in: clustered index */
@@ -235,7 +234,6 @@ row_search_index_entry(
 
 #define ROW_COPY_DATA		1
 #define ROW_COPY_POINTERS	2
-#define ROW_COPY_ALSO_EXTERNALS	3
 
 /* The allowed latching order of index records is the following:
 (1) a secondary index record ->

include/univ.i

@@ -96,8 +96,6 @@ memory is read outside the allocated blocks. */
 #define UNIV_BTR_DEBUG
 #define UNIV_LIGHT_MEM_DEBUG
 
-#define YYDEBUG			1
-
 #ifdef HAVE_purify
 /* The following sets all new allocated memory to zero before use:
 this can be used to eliminate unnecessary Purify warnings, but note that

row/row0row.c

@@ -170,10 +170,9 @@ dtuple_t*
 row_build(
 /*======*/
 				/* out, own: row built; see the NOTE below! */
-	ulint		type,	/* in: ROW_COPY_POINTERS, ROW_COPY_DATA, or
-				ROW_COPY_ALSO_EXTERNALS,
-				the two last copy also the data fields to
-				heap as the first only places pointers to
+	ulint		type,	/* in: ROW_COPY_POINTERS or ROW_COPY_DATA;
+				the latter copies also the data fields to
+				heap while the first only places pointers to
 				data fields on the index page, and thus is
 				more efficient */
 	dict_index_t*	index,	/* in: clustered index */
@@ -245,13 +244,6 @@ row_build(
 						      dict_col_get_no(col));
 			field = rec_get_nth_field(rec, offsets, i, &len);
 
-			if (type == ROW_COPY_ALSO_EXTERNALS
-			    && rec_offs_nth_extern(offsets, i)) {
-
-				field = btr_rec_copy_externally_stored_field
-					(rec, offsets, i, &len, heap);
-			}
-
 			dfield_set_data(dfield, field, len);
 		}
 	}