diff options
Diffstat (limited to 'storage/innodb_plugin/include/rem0rec.ic')
| -rw-r--r-- | storage/innodb_plugin/include/rem0rec.ic | 41 |
1 files changed, 40 insertions, 1 deletions
diff --git a/storage/innodb_plugin/include/rem0rec.ic b/storage/innodb_plugin/include/rem0rec.ic index 8e5bd9a7fcd..7cff36fee6c 100644 --- a/storage/innodb_plugin/include/rem0rec.ic +++ b/storage/innodb_plugin/include/rem0rec.ic @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1994, 2009, Innobase Oy. All Rights Reserved. +Copyright (c) 1994, 2011, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -26,6 +26,7 @@ Created 5/30/1994 Heikki Tuuri #include "mach0data.h" #include "ut0byte.h" #include "dict0dict.h" +#include "btr0types.h" /* Compact flag ORed to the extra size returned by rec_get_offsets() */ #define REC_OFFS_COMPACT ((ulint) 1 << 31) @@ -1087,6 +1088,44 @@ rec_offs_any_extern( return(UNIV_UNLIKELY(*rec_offs_base(offsets) & REC_OFFS_EXTERNAL)); } +#if defined UNIV_DEBUG || defined UNIV_BLOB_LIGHT_DEBUG +/******************************************************//** +Determine if the offsets are for a record containing null BLOB pointers. +@return first field containing a null BLOB pointer, or NULL if none found */ +UNIV_INLINE +const byte* +rec_offs_any_null_extern( +/*=====================*/ + const rec_t* rec, /*!< in: record */ + const ulint* offsets) /*!< in: rec_get_offsets(rec) */ +{ + ulint i; + ut_ad(rec_offs_validate(rec, NULL, offsets)); + + if (!rec_offs_any_extern(offsets)) { + return(NULL); + } + + for (i = 0; i < rec_offs_n_fields(offsets); i++) { + if (rec_offs_nth_extern(offsets, i)) { + ulint len; + const byte* field + = rec_get_nth_field(rec, offsets, i, &len); + + ut_a(len >= BTR_EXTERN_FIELD_REF_SIZE); + if (!memcmp(field + len + - BTR_EXTERN_FIELD_REF_SIZE, + field_ref_zero, + BTR_EXTERN_FIELD_REF_SIZE)) { + return(field); + } + } + } + + return(NULL); +} +#endif /* UNIV_DEBUG || UNIV_BLOB_LIGHT_DEBUG */ + /******************************************************//** Returns nonzero if the extern bit is set in nth field of rec. @return nonzero if externally stored */ |