Merge mysql-5.1 to mysql-5.5.

storage/innobase/row/row0sel.c

 /*****************************************************************************
 
-Copyright (c) 1997, 2010, Innobase Oy. All Rights Reserved.
+Copyright (c) 1997, 2011, Oracle and/or its affiliates. All Rights Reserved.
 Copyright (c) 2008, Google Inc.
 
 Portions of this file contain modifications contributed and copyrighted by
@@ -105,14 +105,22 @@ row_sel_sec_rec_is_for_blob(
 	ulint		clust_len,	/*!< in: length of clust_field */
 	const byte*	sec_field,	/*!< in: column in secondary index */
 	ulint		sec_len,	/*!< in: length of sec_field */
+	ulint		prefix_len,	/*!< in: index column prefix length
+					in bytes */
 	dict_table_t*	table)		/*!< in: table */
 {
 	ulint	len;
 	byte	buf[REC_VERSION_56_MAX_INDEX_COL_LEN];
 	ulint	zip_size = dict_table_flags_to_zip_size(table->flags);
-	ulint	max_prefix_len = DICT_MAX_FIELD_LEN_BY_FORMAT(table);
 
+	/* This function should never be invoked on an Antelope format
+	table, because they should always contain enough prefix in the
+	clustered index record. */
+	ut_ad(dict_table_get_format(table) >= DICT_TF_FORMAT_ZIP);
 	ut_a(clust_len >= BTR_EXTERN_FIELD_REF_SIZE);
+	ut_ad(prefix_len >= sec_len);
+	ut_ad(prefix_len > 0);
+	ut_a(prefix_len <= sizeof buf);
 
 	if (UNIV_UNLIKELY
 	    (!memcmp(clust_field + clust_len - BTR_EXTERN_FIELD_REF_SIZE,
@@ -124,7 +132,7 @@ row_sel_sec_rec_is_for_blob(
 		return(FALSE);
 	}
 
-	len = btr_copy_externally_stored_field_prefix(buf, max_prefix_len,
+	len = btr_copy_externally_stored_field_prefix(buf, prefix_len,
 						      zip_size,
 						      clust_field, clust_len);
 
@@ -138,7 +146,7 @@ row_sel_sec_rec_is_for_blob(
 	}
 
 	len = dtype_get_at_most_n_mbchars(prtype, mbminmaxlen,
-					  sec_len, len, (const char*) buf);
+					  prefix_len, len, (const char*) buf);
 
 	return(!cmp_data_data(mtype, prtype, buf, len, sec_field, sec_len));
 }
@@ -230,6 +238,7 @@ row_sel_sec_rec_is_for_clust_rec(
 					    col->mbminmaxlen,
 					    clust_field, clust_len,
 					    sec_field, sec_len,
+					    ifield->prefix_len,
 					    clust_index->table)) {
 					goto inequal;
 				}