diff options
Diffstat (limited to 'storage/xtradb/rem/rem0rec.c')
| -rw-r--r-- | storage/xtradb/rem/rem0rec.c | 86 |
1 files changed, 70 insertions, 16 deletions
diff --git a/storage/xtradb/rem/rem0rec.c b/storage/xtradb/rem/rem0rec.c index 1c8b3fd8c1e..37ba8ca2ffe 100644 --- a/storage/xtradb/rem/rem0rec.c +++ b/storage/xtradb/rem/rem0rec.c @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1994, 2009, Innobase Oy. All Rights Reserved. +Copyright (c) 1994, 2010, Innobase Oy. 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 @@ -212,6 +212,13 @@ rec_get_n_extern_new( const dict_col_t* col = dict_field_get_col(field); len = *lens--; + /* If the maximum length of the field is up + to 255 bytes, the actual length is always + stored in one byte. If the maximum length is + more than 255 bytes, the actual length is + stored in one byte for 0..127. The length + will be encoded in two bytes when it is 128 or + more, or when the field is stored externally. */ if (UNIV_UNLIKELY(col->len > 255) || UNIV_UNLIKELY(col->mtype == DATA_BLOB)) { if (len & 0x80) { @@ -294,6 +301,13 @@ rec_init_offsets_comp_ordinary( const dict_col_t* col = dict_field_get_col(field); len = *lens--; + /* If the maximum length of the field is up + to 255 bytes, the actual length is always + stored in one byte. If the maximum length is + more than 255 bytes, the actual length is + stored in one byte for 0..127. The length + will be encoded in two bytes when it is 128 or + more, or when the field is stored externally. */ if (UNIV_UNLIKELY(col->len > 255) || UNIV_UNLIKELY(col->mtype == DATA_BLOB)) { @@ -425,6 +439,15 @@ rec_init_offsets( const dict_col_t* col = dict_field_get_col(field); len = *lens--; + /* If the maximum length of the field + is up to 255 bytes, the actual length + is always stored in one byte. If the + maximum length is more than 255 bytes, + the actual length is stored in one + byte for 0..127. The length will be + encoded in two bytes when it is 128 or + more, or when the field is stored + externally. */ if (UNIV_UNLIKELY(col->len > 255) || UNIV_UNLIKELY(col->mtype == DATA_BLOB)) { @@ -647,6 +670,13 @@ rec_get_offsets_reverse( const dict_col_t* col = dict_field_get_col(field); len = *lens++; + /* If the maximum length of the field is up + to 255 bytes, the actual length is always + stored in one byte. If the maximum length is + more than 255 bytes, the actual length is + stored in one byte for 0..127. The length + will be encoded in two bytes when it is 128 or + more, or when the field is stored externally. */ if (UNIV_UNLIKELY(col->len > 255) || UNIV_UNLIKELY(col->mtype == DATA_BLOB)) { if (len & 0x80) { @@ -695,19 +725,9 @@ rec_get_nth_field_offs_old( ulint os; ulint next_os; - ut_ad(rec && len); - ut_ad(n < rec_get_n_fields_old(rec)); - - if (UNIV_UNLIKELY(n > REC_MAX_N_FIELDS)) { - fprintf(stderr, "Error: trying to access field %lu in rec\n", - (ulong) n); - ut_error; - } - - if (UNIV_UNLIKELY(rec == NULL)) { - fputs("Error: rec is NULL pointer\n", stderr); - ut_error; - } + ut_ad(len); + ut_a(rec); + ut_a(n < rec_get_n_fields_old(rec)); if (rec_get_1byte_offs_flag(rec)) { os = rec_1_get_field_start_offs(rec, n); @@ -791,12 +811,20 @@ rec_get_converted_size_comp_prefix( ut_ad(len <= col->len || col->mtype == DATA_BLOB); + /* If the maximum length of a variable-length field + is up to 255 bytes, the actual length is always stored + in one byte. If the maximum length is more than 255 + bytes, the actual length is stored in one byte for + 0..127. The length will be encoded in two bytes when + it is 128 or more, or when the field is stored externally. */ + if (field->fixed_len) { ut_ad(len == field->fixed_len); /* dict_index_add_col() should guarantee this */ ut_ad(!field->prefix_len || field->fixed_len == field->prefix_len); } else if (dfield_is_ext(&fields[i])) { + ut_ad(col->len >= 256 || col->mtype == DATA_BLOB); extra_size += 2; } else if (len < 128 || (col->len < 256 && col->mtype != DATA_BLOB)) { @@ -1096,6 +1124,8 @@ rec_convert_dtuple_to_rec_comp( /* Store the data and the offsets */ for (i = 0, field = fields; i < n_fields; i++, field++) { + const dict_field_t* ifield; + type = dfield_get_type(field); len = dfield_get_len(field); @@ -1130,12 +1160,20 @@ rec_convert_dtuple_to_rec_comp( /* only nullable fields can be null */ ut_ad(!dfield_is_null(field)); - fixed_len = dict_index_get_nth_field(index, i)->fixed_len; - + ifield = dict_index_get_nth_field(index, i); + fixed_len = ifield->fixed_len; + /* If the maximum length of a variable-length field + is up to 255 bytes, the actual length is always stored + in one byte. If the maximum length is more than 255 + bytes, the actual length is stored in one byte for + 0..127. The length will be encoded in two bytes when + it is 128 or more, or when the field is stored externally. */ if (fixed_len) { ut_ad(len == fixed_len); ut_ad(!dfield_is_ext(field)); } else if (dfield_is_ext(field)) { + ut_ad(ifield->col->len >= 256 + || ifield->col->mtype == DATA_BLOB); ut_ad(len <= REC_MAX_INDEX_COL_LEN + BTR_EXTERN_FIELD_REF_SIZE); *lens-- = (byte) (len >> 8) | 0xc0; @@ -1225,11 +1263,20 @@ rec_convert_dtuple_to_rec( mem_heap_t* heap = NULL; ulint offsets_[REC_OFFS_NORMAL_SIZE]; const ulint* offsets; + ulint i; rec_offs_init(offsets_); offsets = rec_get_offsets(rec, index, offsets_, ULINT_UNDEFINED, &heap); ut_ad(rec_validate(rec, offsets)); + ut_ad(dtuple_get_n_fields(dtuple) + == rec_offs_n_fields(offsets)); + + for (i = 0; i < rec_offs_n_fields(offsets); i++) { + ut_ad(!dfield_is_ext(dtuple_get_nth_field(dtuple, i)) + == !rec_offs_nth_extern(offsets, i)); + } + if (UNIV_LIKELY_NULL(heap)) { mem_heap_free(heap); } @@ -1412,6 +1459,13 @@ rec_copy_prefix_to_buf( prefix_len += field->fixed_len; } else { ulint len = *lens--; + /* If the maximum length of the column is up + to 255 bytes, the actual length is always + stored in one byte. If the maximum length is + more than 255 bytes, the actual length is + stored in one byte for 0..127. The length + will be encoded in two bytes when it is 128 or + more, or when the column is stored externally. */ if (col->len > 255 || col->mtype == DATA_BLOB) { if (len & 0x80) { /* 1exxxxxx */ |