diff options
Diffstat (limited to 'storage/innodb_plugin/row/row0sel.c')
| -rw-r--r-- | storage/innodb_plugin/row/row0sel.c | 112 |
1 files changed, 84 insertions, 28 deletions
diff --git a/storage/innodb_plugin/row/row0sel.c b/storage/innodb_plugin/row/row0sel.c index 423ddfade22..32f21dbe198 100644 --- a/storage/innodb_plugin/row/row0sel.c +++ b/storage/innodb_plugin/row/row0sel.c @@ -1,6 +1,6 @@ /***************************************************************************** -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 @@ -101,12 +101,17 @@ 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 */ ulint zip_size) /*!< in: compressed page size, or 0 */ { ulint len; byte buf[DICT_MAX_INDEX_COL_LEN]; 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, @@ -118,7 +123,7 @@ row_sel_sec_rec_is_for_blob( return(FALSE); } - len = btr_copy_externally_stored_field_prefix(buf, sizeof buf, + len = btr_copy_externally_stored_field_prefix(buf, prefix_len, zip_size, clust_field, clust_len); @@ -132,7 +137,7 @@ row_sel_sec_rec_is_for_blob( } len = dtype_get_at_most_n_mbchars(prtype, mbminlen, mbmaxlen, - sec_len, len, (const char*) buf); + prefix_len, len, (const char*) buf); return(!cmp_data_data(mtype, prtype, buf, len, sec_field, sec_len)); } @@ -219,11 +224,20 @@ row_sel_sec_rec_is_for_clust_rec( if (rec_offs_nth_extern(clust_offs, clust_pos) && len < sec_len) { + /* 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(clust_index->table) + >= DICT_TF_FORMAT_ZIP); + if (!row_sel_sec_rec_is_for_blob( col->mtype, col->prtype, col->mbminlen, col->mbmaxlen, clust_field, clust_len, sec_field, sec_len, + ifield->prefix_len, dict_table_zip_size( clust_index->table))) { goto inequal; @@ -494,7 +508,7 @@ sel_col_prefetch_buf_alloc( sel_buf = column->prefetch_buf + i; sel_buf->data = NULL; - + sel_buf->len = 0; sel_buf->val_buf_size = 0; } } @@ -519,6 +533,8 @@ sel_col_prefetch_buf_free( mem_free(sel_buf->data); } } + + mem_free(prefetch_buf); } /*********************************************************************//** @@ -2544,6 +2560,8 @@ row_sel_field_store_in_mysql_format( ut_ad(len != UNIV_SQL_NULL); UNIV_MEM_ASSERT_RW(data, len); + UNIV_MEM_ASSERT_W(dest, templ->mysql_col_len); + UNIV_MEM_INVALID(dest, templ->mysql_col_len); switch (templ->type) { case DATA_INT: @@ -2580,14 +2598,16 @@ row_sel_field_store_in_mysql_format( dest = row_mysql_store_true_var_len( dest, len, templ->mysql_length_bytes); + /* Copy the actual data. Leave the rest of the + buffer uninitialized. */ + memcpy(dest, data, len); + break; } /* Copy the actual data */ ut_memcpy(dest, data, len); - /* Pad with trailing spaces. We pad with spaces also the - unused end of a >= 5.0.3 true VARCHAR column, just in case - MySQL expects its contents to be deterministic. */ + /* Pad with trailing spaces. */ pad_ptr = dest + len; @@ -3120,6 +3140,39 @@ sel_restore_position_for_mysql( } /********************************************************************//** +Copies a cached field for MySQL from the fetch cache. */ +static +void +row_sel_copy_cached_field_for_mysql( +/*================================*/ + byte* buf, /*!< in/out: row buffer */ + const byte* cache, /*!< in: cached row */ + const mysql_row_templ_t*templ) /*!< in: column template */ +{ + ulint len; + + buf += templ->mysql_col_offset; + cache += templ->mysql_col_offset; + + UNIV_MEM_ASSERT_W(buf, templ->mysql_col_len); + + if (templ->mysql_type == DATA_MYSQL_TRUE_VARCHAR + && templ->type != DATA_INT) { + /* Check for != DATA_INT to make sure we do + not treat MySQL ENUM or SET as a true VARCHAR! + Find the actual length of the true VARCHAR field. */ + row_mysql_read_true_varchar( + &len, cache, templ->mysql_length_bytes); + len += templ->mysql_length_bytes; + UNIV_MEM_INVALID(buf, templ->mysql_col_len); + } else { + len = templ->mysql_col_len; + } + + ut_memcpy(buf, cache, len); +} + +/********************************************************************//** Pops a cached row for MySQL from the fetch cache. */ UNIV_INLINE void @@ -3131,26 +3184,22 @@ row_sel_pop_cached_row_for_mysql( { ulint i; const mysql_row_templ_t*templ; - byte* cached_rec; + const byte* cached_rec; ut_ad(prebuilt->n_fetch_cached > 0); ut_ad(prebuilt->mysql_prefix_len <= prebuilt->mysql_row_len); + UNIV_MEM_ASSERT_W(buf, prebuilt->mysql_row_len); + + cached_rec = prebuilt->fetch_cache[prebuilt->fetch_cache_first]; + if (UNIV_UNLIKELY(prebuilt->keep_other_fields_on_keyread)) { /* Copy cache record field by field, don't touch fields that are not covered by current key */ - cached_rec = prebuilt->fetch_cache[ - prebuilt->fetch_cache_first]; for (i = 0; i < prebuilt->n_template; i++) { templ = prebuilt->mysql_template + i; -#if 0 /* Some of the cached_rec may legitimately be uninitialized. */ - UNIV_MEM_ASSERT_RW(cached_rec - + templ->mysql_col_offset, - templ->mysql_col_len); -#endif - ut_memcpy(buf + templ->mysql_col_offset, - cached_rec + templ->mysql_col_offset, - templ->mysql_col_len); + row_sel_copy_cached_field_for_mysql( + buf, cached_rec, templ); /* Copy NULL bit of the current field from cached_rec to buf */ if (templ->mysql_null_bit_mask) { @@ -3160,17 +3209,24 @@ row_sel_pop_cached_row_for_mysql( & (byte)templ->mysql_null_bit_mask; } } + } else if (prebuilt->mysql_prefix_len > 63) { + /* The record is long. Copy it field by field, in case + there are some long VARCHAR column of which only a + small length is being used. */ + UNIV_MEM_INVALID(buf, prebuilt->mysql_prefix_len); + + /* First copy the NULL bits. */ + ut_memcpy(buf, cached_rec, prebuilt->null_bitmap_len); + /* Then copy the requested fields. */ + + for (i = 0; i < prebuilt->n_template; i++) { + row_sel_copy_cached_field_for_mysql( + buf, cached_rec, prebuilt->mysql_template + i); + } + } else { + ut_memcpy(buf, cached_rec, prebuilt->mysql_prefix_len); } - else { -#if 0 /* Some of the cached_rec may legitimately be uninitialized. */ - UNIV_MEM_ASSERT_RW(prebuilt->fetch_cache - [prebuilt->fetch_cache_first], - prebuilt->mysql_prefix_len); -#endif - ut_memcpy(buf, - prebuilt->fetch_cache[prebuilt->fetch_cache_first], - prebuilt->mysql_prefix_len); - } + prebuilt->n_fetch_cached--; prebuilt->fetch_cache_first++; |