MySQL 8.4.3
Source Code Documentation
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Generic routines for packing rows (possibly from multiple tables at the same time) into strings, and then back again. More...
#include <assert.h>
#include <stddef.h>
#include <string.h>
#include "field_types.h"
#include "my_bitmap.h"
#include "my_compiler.h"
#include "my_inttypes.h"
#include "my_table_map.h"
#include "mysql/components/services/bits/psi_bits.h"
#include "prealloced_array.h"
#include "sql/field.h"
#include "sql/handler.h"
#include "sql/table.h"
#include "template_utils.h"
Go to the source code of this file.
Classes | |
struct | pack_rows::Column |
A class that represents a field, which also holds a cached value of the field's data type. More... | |
struct | pack_rows::Table |
This struct is primarily used for holding the extracted columns in a hash join or BKA join, or the input columns in a streaming aggregation operation. More... | |
class | pack_rows::TableCollection |
A structure that contains a list of input tables for a hash join operation, BKA join operation or a streaming aggregation operation, and some pre-computed properties for the tables. More... | |
Namespaces | |
namespace | pack_rows |
Enumerations | |
enum class | pack_rows::NullRowFlag { pack_rows::kNotNull , pack_rows::kNullWithoutData , pack_rows::kNullWithData } |
Possible values of the NULL-row flag stored by StoreFromTableBuffers(). More... | |
Functions | |
size_t | pack_rows::ComputeRowSizeUpperBound (const TableCollection &tables) |
Count up how many bytes a single row from the given tables will occupy, in "packed" format. More... | |
bool | pack_rows::StoreFromTableBuffers (const TableCollection &tables, String *buffer) |
Take the data marked for reading in "tables" and store it in the provided buffer. More... | |
const uchar * | pack_rows::LoadIntoTableBuffers (const TableCollection &tables, const uchar *ptr) |
Take the data in "ptr" and put it back to the tables' record buffers. More... | |
void | pack_rows::RequestRowId (const Prealloced_array< pack_rows::Table, 4 > &tables, table_map tables_to_get_rowid_for) |
For each of the given tables, request that the row ID is filled in (the equivalent of calling file->position()) if needed. More... | |
void | pack_rows::PrepareForRequestRowId (const Prealloced_array< Table, 4 > &tables, table_map tables_to_get_rowid_for) |
bool | pack_rows::ShouldCopyRowId (const TABLE *table) |
ALWAYS_INLINE uchar * | pack_rows::StoreFromTableBuffersRaw (const TableCollection &tables, uchar *dptr) |
Generic routines for packing rows (possibly from multiple tables at the same time) into strings, and then back again.
Used for (at least) hash join, BKA, and streaming aggregation.