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chunk_data_node.c
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chunk_data_node.c
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/*
* This file and its contents are licensed under the Apache License 2.0.
* Please see the included NOTICE for copyright information and
* LICENSE-APACHE for a copy of the license.
*/
#include <postgres.h>
#include <catalog/pg_foreign_table.h>
#include <catalog/pg_foreign_server.h>
#include <catalog/dependency.h>
#include <foreign/foreign.h>
#include <utils/builtins.h>
#include <utils/syscache.h>
#include <utils/inval.h>
#include <access/xact.h>
#include "ts_catalog/chunk_data_node.h"
#include "cache.h"
#include "hypercube.h"
#include "hypertable_cache.h"
#include "scanner.h"
#include "chunk.h"
static void
chunk_data_node_insert_relation(const Relation rel, int32 chunk_id, int32 node_chunk_id,
const NameData *node_name)
{
TupleDesc desc = RelationGetDescr(rel);
Datum values[Natts_chunk_data_node];
bool nulls[Natts_chunk_data_node] = { false };
CatalogSecurityContext sec_ctx;
values[AttrNumberGetAttrOffset(Anum_chunk_data_node_chunk_id)] = Int32GetDatum(chunk_id);
values[AttrNumberGetAttrOffset(Anum_chunk_data_node_node_chunk_id)] =
Int32GetDatum(node_chunk_id);
values[AttrNumberGetAttrOffset(Anum_chunk_data_node_node_name)] = NameGetDatum(node_name);
ts_catalog_database_info_become_owner(ts_catalog_database_info_get(), &sec_ctx);
ts_catalog_insert_values(rel, desc, values, nulls);
ts_catalog_restore_user(&sec_ctx);
}
static void
chunk_data_node_insert_internal(int32 chunk_id, int32 node_chunk_id, const NameData *node_name)
{
Catalog *catalog = ts_catalog_get();
Relation rel;
rel = table_open(catalog->tables[CHUNK_DATA_NODE].id, RowExclusiveLock);
chunk_data_node_insert_relation(rel, chunk_id, node_chunk_id, node_name);
table_close(rel, RowExclusiveLock);
}
void
ts_chunk_data_node_insert(const ChunkDataNode *node)
{
chunk_data_node_insert_internal(node->fd.chunk_id, node->fd.node_chunk_id, &node->fd.node_name);
}
void
ts_chunk_data_node_insert_multi(List *chunk_data_nodes)
{
Catalog *catalog = ts_catalog_get();
Relation rel;
ListCell *lc;
rel = table_open(catalog->tables[CHUNK_DATA_NODE].id, RowExclusiveLock);
foreach (lc, chunk_data_nodes)
{
ChunkDataNode *node = lfirst(lc);
chunk_data_node_insert_relation(rel,
node->fd.chunk_id,
node->fd.node_chunk_id,
&node->fd.node_name);
}
table_close(rel, RowExclusiveLock);
}
static int
chunk_data_node_scan_limit_internal(ScanKeyData *scankey, int num_scankeys, int indexid,
tuple_found_func on_tuple_found, void *scandata, int limit,
LOCKMODE lock, MemoryContext mctx)
{
Catalog *catalog = ts_catalog_get();
ScannerCtx scanctx = {
.table = catalog->tables[CHUNK_DATA_NODE].id,
.index = catalog_get_index(catalog, CHUNK_DATA_NODE, indexid),
.nkeys = num_scankeys,
.scankey = scankey,
.data = scandata,
.limit = limit,
.tuple_found = on_tuple_found,
.lockmode = lock,
.scandirection = ForwardScanDirection,
.result_mctx = mctx,
};
return ts_scanner_scan(&scanctx);
}
static ScanTupleResult
chunk_data_node_tuple_found(TupleInfo *ti, void *data)
{
List **nodes = data;
bool should_free;
HeapTuple tuple = ts_scanner_fetch_heap_tuple(ti, false, &should_free);
Form_chunk_data_node form = (Form_chunk_data_node) GETSTRUCT(tuple);
ForeignServer *server;
ChunkDataNode *chunk_data_node;
MemoryContext old;
server = GetForeignServerByName(NameStr(form->node_name), false);
old = MemoryContextSwitchTo(ti->mctx);
chunk_data_node = palloc(sizeof(ChunkDataNode));
memcpy(&chunk_data_node->fd, form, sizeof(FormData_chunk_data_node));
chunk_data_node->foreign_server_oid = server->serverid;
*nodes = lappend(*nodes, chunk_data_node);
MemoryContextSwitchTo(old);
if (should_free)
heap_freetuple(tuple);
return SCAN_CONTINUE;
}
/* return a filtered list of "available" ChunkDataNode entries */
static ScanTupleResult
chunk_data_node_tuple_found_filter(TupleInfo *ti, void *data)
{
List **nodes = data;
bool should_free;
HeapTuple tuple = ts_scanner_fetch_heap_tuple(ti, false, &should_free);
Form_chunk_data_node form = (Form_chunk_data_node) GETSTRUCT(tuple);
ForeignServer *server;
server = GetForeignServerByName(NameStr(form->node_name), false);
if (ts_data_node_is_available_by_server(server))
{
ChunkDataNode *chunk_data_node;
MemoryContext old;
old = MemoryContextSwitchTo(ti->mctx);
chunk_data_node = palloc(sizeof(ChunkDataNode));
memcpy(&chunk_data_node->fd, form, sizeof(FormData_chunk_data_node));
chunk_data_node->foreign_server_oid = server->serverid;
*nodes = lappend(*nodes, chunk_data_node);
MemoryContextSwitchTo(old);
}
if (should_free)
heap_freetuple(tuple);
return SCAN_CONTINUE;
}
static int
ts_chunk_data_node_scan_by_chunk_id_and_node_internal(int32 chunk_id, const char *node_name,
bool scan_by_remote_chunk_id,
tuple_found_func tuple_found, void *data,
LOCKMODE lockmode, MemoryContext mctx)
{
ScanKeyData scankey[2];
int nkeys = 0;
int attrnum_chunk_id;
int attrnum_node_name;
int indexid;
if (scan_by_remote_chunk_id)
{
attrnum_chunk_id = Anum_chunk_data_node_node_chunk_id_node_name_idx_chunk_id;
attrnum_node_name = Anum_chunk_data_node_node_chunk_id_node_name_idx_node_name;
indexid = CHUNK_DATA_NODE_NODE_CHUNK_ID_NODE_NAME_IDX;
}
else
{
attrnum_chunk_id = Anum_chunk_data_node_chunk_id_node_name_idx_chunk_id;
attrnum_node_name = Anum_chunk_data_node_chunk_id_node_name_idx_node_name;
indexid = CHUNK_DATA_NODE_CHUNK_ID_NODE_NAME_IDX;
}
ScanKeyInit(&scankey[nkeys++],
attrnum_chunk_id,
BTEqualStrategyNumber,
F_INT4EQ,
Int32GetDatum(chunk_id));
if (NULL != node_name)
ScanKeyInit(&scankey[nkeys++],
attrnum_node_name,
BTEqualStrategyNumber,
F_NAMEEQ,
CStringGetDatum(node_name));
return chunk_data_node_scan_limit_internal(scankey,
nkeys,
indexid,
tuple_found,
data,
0,
lockmode,
mctx);
}
static int
ts_chunk_data_node_scan_by_node_internal(const char *node_name, tuple_found_func tuple_found,
void *data, LOCKMODE lockmode, MemoryContext mctx)
{
ScanKeyData scankey[1];
ScanKeyInit(&scankey[0],
Anum_chunk_data_node_node_name,
BTEqualStrategyNumber,
F_NAMEEQ,
CStringGetDatum(node_name));
return chunk_data_node_scan_limit_internal(scankey,
1,
INVALID_INDEXID,
tuple_found,
data,
0,
lockmode,
mctx);
}
/* Returns a List of ChunkDataNode structs. */
List *
ts_chunk_data_node_scan_by_chunk_id(int32 chunk_id, MemoryContext mctx)
{
List *chunk_data_nodes = NIL;
ts_chunk_data_node_scan_by_chunk_id_and_node_internal(chunk_id,
NULL,
false,
chunk_data_node_tuple_found,
&chunk_data_nodes,
AccessShareLock,
mctx);
return chunk_data_nodes;
}
/* Returns a filtered List of available ChunkDataNode structs. */
List *
ts_chunk_data_node_scan_by_chunk_id_filter(int32 chunk_id, MemoryContext mctx)
{
List *chunk_data_nodes = NIL;
ts_chunk_data_node_scan_by_chunk_id_and_node_internal(chunk_id,
NULL,
false,
chunk_data_node_tuple_found_filter,
&chunk_data_nodes,
AccessShareLock,
mctx);
return chunk_data_nodes;
}
static ChunkDataNode *
chunk_data_node_scan_by_chunk_id_and_node_name(int32 chunk_id, const char *node_name,
bool scan_by_remote_chunk_id, MemoryContext mctx)
{
List *chunk_data_nodes = NIL;
ts_chunk_data_node_scan_by_chunk_id_and_node_internal(chunk_id,
node_name,
scan_by_remote_chunk_id,
chunk_data_node_tuple_found,
&chunk_data_nodes,
AccessShareLock,
mctx);
Assert(list_length(chunk_data_nodes) <= 1);
if (chunk_data_nodes == NIL)
return NULL;
return linitial(chunk_data_nodes);
}
ChunkDataNode *
ts_chunk_data_node_scan_by_chunk_id_and_node_name(int32 chunk_id, const char *node_name,
MemoryContext mctx)
{
return chunk_data_node_scan_by_chunk_id_and_node_name(chunk_id, node_name, false, mctx);
}
ChunkDataNode *
ts_chunk_data_node_scan_by_remote_chunk_id_and_node_name(int32 chunk_id, const char *node_name,
MemoryContext mctx)
{
return chunk_data_node_scan_by_chunk_id_and_node_name(chunk_id, node_name, true, mctx);
}
static ScanTupleResult
chunk_data_node_tuple_delete(TupleInfo *ti, void *data)
{
CatalogSecurityContext sec_ctx;
ts_catalog_database_info_become_owner(ts_catalog_database_info_get(), &sec_ctx);
ts_catalog_delete_tid(ti->scanrel, ts_scanner_get_tuple_tid(ti));
ts_catalog_restore_user(&sec_ctx);
return SCAN_CONTINUE;
}
int
ts_chunk_data_node_delete_by_chunk_id(int32 chunk_id)
{
return ts_chunk_data_node_scan_by_chunk_id_and_node_internal(chunk_id,
NULL,
false,
chunk_data_node_tuple_delete,
NULL,
RowExclusiveLock,
CurrentMemoryContext);
}
int
ts_chunk_data_node_delete_by_chunk_id_and_node_name(int32 chunk_id, const char *node_name)
{
return ts_chunk_data_node_scan_by_chunk_id_and_node_internal(chunk_id,
node_name,
false,
chunk_data_node_tuple_delete,
NULL,
RowExclusiveLock,
CurrentMemoryContext);
}
int
ts_chunk_data_node_delete_by_node_name(const char *node_name)
{
return ts_chunk_data_node_scan_by_node_internal(node_name,
chunk_data_node_tuple_delete,
NULL,
RowExclusiveLock,
CurrentMemoryContext);
}
List *
ts_chunk_data_node_scan_by_node_name_and_hypertable_id(const char *node_name, int32 hypertable_id,
MemoryContext mctx)
{
List *results = NIL;
ListCell *lc;
MemoryContext old;
List *chunk_ids = NIL;
old = MemoryContextSwitchTo(mctx);
chunk_ids = ts_chunk_get_chunk_ids_by_hypertable_id(hypertable_id);
foreach (lc, chunk_ids)
{
int32 chunk_id = lfirst_int(lc);
ChunkDataNode *cdn =
ts_chunk_data_node_scan_by_chunk_id_and_node_name(chunk_id, node_name, mctx);
if (cdn != NULL)
results = lappend(results, cdn);
}
MemoryContextSwitchTo(old);
return results;
}
ScanIterator
ts_chunk_data_nodes_scan_iterator_create(MemoryContext result_mcxt)
{
ScanIterator it = ts_scan_iterator_create(CHUNK_DATA_NODE, AccessShareLock, result_mcxt);
it.ctx.flags |= SCANNER_F_NOEND_AND_NOCLOSE;
return it;
}
void
ts_chunk_data_nodes_scan_iterator_set_chunk_id(ScanIterator *it, int32 chunk_id)
{
it->ctx.index = catalog_get_index(ts_catalog_get(),
CHUNK_DATA_NODE,
CHUNK_DATA_NODE_CHUNK_ID_NODE_NAME_IDX);
ts_scan_iterator_scan_key_reset(it);
ts_scan_iterator_scan_key_init(it,
Anum_chunk_data_node_chunk_id_node_name_idx_chunk_id,
BTEqualStrategyNumber,
F_INT4EQ,
Int32GetDatum(chunk_id));
}
void
ts_chunk_data_nodes_scan_iterator_set_node_name(ScanIterator *it, const char *node_name)
{
it->ctx.index =
catalog_get_index(ts_catalog_get(), CHUNK_DATA_NODE, CHUNK_DATA_NODE_NODE_NAME_IDX);
ts_scan_iterator_scan_key_reset(it);
ts_scan_iterator_scan_key_init(it,
Anum_chunk_data_node_name_idx_node_name,
BTEqualStrategyNumber,
F_NAMEEQ,
CStringGetDatum(node_name));
}