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Remove StripeFooter

merge-cstore-pykello
Hadi Moshayedi 2020-09-21 22:59:21 -07:00
parent db5287069f
commit a34cdeb83c
5 changed files with 24 additions and 244 deletions
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18
cstore.h
View File

@ -77,6 +77,7 @@ typedef struct StripeMetadata
{ {
uint64 fileOffset; uint64 fileOffset;
uint64 dataLength; uint64 dataLength;
uint32 columnCount;
uint32 blockCount; uint32 blockCount;
uint32 blockRowCount; uint32 blockRowCount;
uint64 rowCount; uint64 rowCount;
@ -186,19 +187,6 @@ typedef struct StripeBuffers
} StripeBuffers; } StripeBuffers;
/*
* StripeFooter represents a stripe's footer. In this footer, we keep three
* arrays of sizes. The number of elements in each of the arrays is equal
* to the number of columns.
*/
typedef struct StripeFooter
{
uint32 columnCount;
uint64 *existsSizeArray;
uint64 *valueSizeArray;
} StripeFooter;
/* TableReadState represents state of a cstore file read operation. */ /* TableReadState represents state of a cstore file read operation. */
typedef struct TableReadState typedef struct TableReadState
{ {
@ -235,7 +223,6 @@ typedef struct TableWriteState
TupleDesc tupleDescriptor; TupleDesc tupleDescriptor;
FmgrInfo **comparisonFunctionArray; FmgrInfo **comparisonFunctionArray;
uint64 currentFileOffset; uint64 currentFileOffset;
uint64 currentStripeOffset;
Relation relation; Relation relation;
MemoryContext stripeWriteContext; MemoryContext stripeWriteContext;
@ -296,9 +283,6 @@ extern bool CompressBuffer(StringInfo inputBuffer, StringInfo outputBuffer,
extern StringInfo DecompressBuffer(StringInfo buffer, CompressionType compressionType); extern StringInfo DecompressBuffer(StringInfo buffer, CompressionType compressionType);
/* cstore_metadata_tables.c */ /* cstore_metadata_tables.c */
extern void SaveStripeFooter(Oid relid, uint64 stripe, StripeFooter *footer);
extern StripeFooter * ReadStripeFooter(Oid relid, uint64 stripe, int relationColumnCount);
extern void InitCStoreTableMetadata(Oid relid, int blockRowCount); extern void InitCStoreTableMetadata(Oid relid, int blockRowCount);
extern void InsertStripeMetadataRow(Oid relid, StripeMetadata *stripe); extern void InsertStripeMetadataRow(Oid relid, StripeMetadata *stripe);
extern TableMetadata * ReadTableMetadata(Oid relid); extern TableMetadata * ReadTableMetadata(Oid relid);

15
cstore_fdw--1.7.sql
View File

@ -73,6 +73,7 @@ CREATE TABLE cstore_stripes (
stripe bigint NOT NULL, stripe bigint NOT NULL,
file_offset bigint NOT NULL, file_offset bigint NOT NULL,
data_length bigint NOT NULL, data_length bigint NOT NULL,
column_count int NOT NULL,
block_count int NOT NULL, block_count int NOT NULL,
block_row_count int NOT NULL, block_row_count int NOT NULL,
row_count bigint NOT NULL, row_count bigint NOT NULL,
@ -82,18 +83,6 @@ CREATE TABLE cstore_stripes (
COMMENT ON TABLE cstore_tables IS 'CStore per stripe metadata'; COMMENT ON TABLE cstore_tables IS 'CStore per stripe metadata';
CREATE TABLE cstore_stripe_attr (
relid oid NOT NULL,
stripe bigint NOT NULL,
attr int NOT NULL,
exists_size bigint NOT NULL,
value_size bigint NOT NULL,
PRIMARY KEY (relid, stripe, attr),
FOREIGN KEY (relid, stripe) REFERENCES cstore_stripes(relid, stripe) ON DELETE CASCADE INITIALLY DEFERRED
) WITH (user_catalog_table = true);
COMMENT ON TABLE cstore_tables IS 'CStore per stripe/column combination metadata';
CREATE TABLE cstore_skipnodes ( CREATE TABLE cstore_skipnodes (
relid oid NOT NULL, relid oid NOT NULL,
stripe bigint NOT NULL, stripe bigint NOT NULL,
@ -108,7 +97,7 @@ CREATE TABLE cstore_skipnodes (
exists_stream_length bigint NOT NULL, exists_stream_length bigint NOT NULL,
value_compression_type int NOT NULL, value_compression_type int NOT NULL,
PRIMARY KEY (relid, stripe, attr, block), PRIMARY KEY (relid, stripe, attr, block),
FOREIGN KEY (relid, stripe, attr) REFERENCES cstore_stripe_attr(relid, stripe, attr) ON DELETE CASCADE INITIALLY DEFERRED FOREIGN KEY (relid, stripe) REFERENCES cstore_stripes(relid, stripe) ON DELETE CASCADE INITIALLY DEFERRED
) WITH (user_catalog_table = true); ) WITH (user_catalog_table = true);
COMMENT ON TABLE cstore_tables IS 'CStore per block metadata'; COMMENT ON TABLE cstore_tables IS 'CStore per block metadata';

141
cstore_metadata_tables.c
View File

@ -43,8 +43,6 @@ typedef struct
EState *estate; EState *estate;
} ModifyState; } ModifyState;
static Oid CStoreStripeAttrRelationId(void);
static Oid CStoreStripeAttrIndexRelationId(void);
static Oid CStoreStripesRelationId(void); static Oid CStoreStripesRelationId(void);
static Oid CStoreStripesIndexRelationId(void); static Oid CStoreStripesIndexRelationId(void);
static Oid CStoreTablesRelationId(void); static Oid CStoreTablesRelationId(void);
@ -63,14 +61,6 @@ static EState * create_estate_for_relation(Relation rel);
static bytea * DatumToBytea(Datum value, Form_pg_attribute attrForm); static bytea * DatumToBytea(Datum value, Form_pg_attribute attrForm);
static Datum ByteaToDatum(bytea *bytes, Form_pg_attribute attrForm); static Datum ByteaToDatum(bytea *bytes, Form_pg_attribute attrForm);
/* constants for cstore_stripe_attr */
#define Natts_cstore_stripe_attr 5
#define Anum_cstore_stripe_attr_relid 1
#define Anum_cstore_stripe_attr_stripe 2
#define Anum_cstore_stripe_attr_attr 3
#define Anum_cstore_stripe_attr_exists_size 4
#define Anum_cstore_stripe_attr_value_size 5
/* constants for cstore_table */ /* constants for cstore_table */
#define Natts_cstore_tables 4 #define Natts_cstore_tables 4
#define Anum_cstore_tables_relid 1 #define Anum_cstore_tables_relid 1
@ -79,14 +69,15 @@ static Datum ByteaToDatum(bytea *bytes, Form_pg_attribute attrForm);
#define Anum_cstore_tables_version_minor 4 #define Anum_cstore_tables_version_minor 4
/* constants for cstore_stripe */ /* constants for cstore_stripe */
#define Natts_cstore_stripes 7 #define Natts_cstore_stripes 8
#define Anum_cstore_stripes_relid 1 #define Anum_cstore_stripes_relid 1
#define Anum_cstore_stripes_stripe 2 #define Anum_cstore_stripes_stripe 2
#define Anum_cstore_stripes_file_offset 3 #define Anum_cstore_stripes_file_offset 3
#define Anum_cstore_stripes_data_length 4 #define Anum_cstore_stripes_data_length 4
#define Anum_cstore_stripes_block_count 5 #define Anum_cstore_stripes_column_count 5
#define Anum_cstore_stripes_block_row_count 6 #define Anum_cstore_stripes_block_count 6
#define Anum_cstore_stripes_row_count 7 #define Anum_cstore_stripes_block_row_count 7
#define Anum_cstore_stripes_row_count 8
/* constants for cstore_skipnodes */ /* constants for cstore_skipnodes */
#define Natts_cstore_skipnodes 12 #define Natts_cstore_skipnodes 12
@ -328,6 +319,7 @@ InsertStripeMetadataRow(Oid relid, StripeMetadata *stripe)
Int64GetDatum(stripe->id), Int64GetDatum(stripe->id),
Int64GetDatum(stripe->fileOffset), Int64GetDatum(stripe->fileOffset),
Int64GetDatum(stripe->dataLength), Int64GetDatum(stripe->dataLength),
Int32GetDatum(stripe->columnCount),
Int32GetDatum(stripe->blockCount), Int32GetDatum(stripe->blockCount),
Int32GetDatum(stripe->blockRowCount), Int32GetDatum(stripe->blockRowCount),
Int64GetDatum(stripe->rowCount) Int64GetDatum(stripe->rowCount)
@ -388,6 +380,8 @@ ReadTableMetadata(Oid relid)
datumArray[Anum_cstore_stripes_file_offset - 1]); datumArray[Anum_cstore_stripes_file_offset - 1]);
stripeMetadata->dataLength = DatumGetInt64( stripeMetadata->dataLength = DatumGetInt64(
datumArray[Anum_cstore_stripes_data_length - 1]); datumArray[Anum_cstore_stripes_data_length - 1]);
stripeMetadata->columnCount = DatumGetInt32(
datumArray[Anum_cstore_stripes_column_count - 1]);
stripeMetadata->blockCount = DatumGetInt32( stripeMetadata->blockCount = DatumGetInt32(
datumArray[Anum_cstore_stripes_block_count - 1]); datumArray[Anum_cstore_stripes_block_count - 1]);
stripeMetadata->blockRowCount = DatumGetInt32( stripeMetadata->blockRowCount = DatumGetInt32(
@ -485,103 +479,6 @@ DeleteTableMetadataRowIfExists(Oid relid)
} }
/*
* SaveStripeFooter stores give StripeFooter as cstore_stripe_attr records.
*/
void
SaveStripeFooter(Oid relid, uint64 stripe, StripeFooter *footer)
{
Oid cstoreStripeAttrOid = CStoreStripeAttrRelationId();
Relation cstoreStripeAttrs = heap_open(cstoreStripeAttrOid, RowExclusiveLock);
ModifyState *modifyState = StartModifyRelation(cstoreStripeAttrs);
for (AttrNumber attr = 1; attr <= footer->columnCount; attr++)
{
bool nulls[Natts_cstore_stripe_attr] = { 0 };
Datum values[Natts_cstore_stripe_attr] = {
ObjectIdGetDatum(relid),
Int64GetDatum(stripe),
Int16GetDatum(attr),
Int64GetDatum(footer->existsSizeArray[attr - 1]),
Int64GetDatum(footer->valueSizeArray[attr - 1])
};
InsertTupleAndEnforceConstraints(modifyState, values, nulls);
}
FinishModifyRelation(modifyState);
heap_close(cstoreStripeAttrs, NoLock);
}
/*
* ReadStripeFooter returns a StripeFooter by reading relevant records from
* cstore_stripe_attr.
*/
StripeFooter *
ReadStripeFooter(Oid relid, uint64 stripe, int relationColumnCount)
{
StripeFooter *footer = NULL;
HeapTuple heapTuple;
Oid cstoreStripeAttrOid = CStoreStripeAttrRelationId();
Relation cstoreStripeAttrs = heap_open(cstoreStripeAttrOid, AccessShareLock);
Relation index = index_open(CStoreStripeAttrIndexRelationId(), AccessShareLock);
TupleDesc tupleDescriptor = RelationGetDescr(cstoreStripeAttrs);
SysScanDesc scanDescriptor = NULL;
ScanKeyData scanKey[2];
ScanKeyInit(&scanKey[0], Anum_cstore_stripe_attr_relid,
BTEqualStrategyNumber, F_OIDEQ, Int32GetDatum(relid));
ScanKeyInit(&scanKey[1], Anum_cstore_stripe_attr_stripe,
BTEqualStrategyNumber, F_INT8EQ, Int64GetDatum(stripe));
scanDescriptor = systable_beginscan_ordered(cstoreStripeAttrs, index, NULL, 2,
scanKey);
footer = palloc0(sizeof(StripeFooter));
footer->existsSizeArray = palloc0(relationColumnCount * sizeof(int64));
footer->valueSizeArray = palloc0(relationColumnCount * sizeof(int64));
/*
* Stripe can have less columns than the relation if ALTER TABLE happens
* after stripe is formed. So we calculate column count of a stripe as
* maximum attribute number for that stripe.
*/
footer->columnCount = 0;
while (HeapTupleIsValid(heapTuple = systable_getnext(scanDescriptor)))
{
Datum datumArray[Natts_cstore_stripe_attr];
bool isNullArray[Natts_cstore_stripe_attr];
AttrNumber attr = 0;
heap_deform_tuple(heapTuple, tupleDescriptor, datumArray, isNullArray);
attr = DatumGetInt16(datumArray[2]);
footer->columnCount = Max(footer->columnCount, attr);
while (attr > relationColumnCount)
{
ereport(ERROR, (errmsg("unexpected attribute %d for a relation with %d attrs",
attr, relationColumnCount)));
}
footer->existsSizeArray[attr - 1] =
DatumGetInt64(datumArray[Anum_cstore_stripe_attr_exists_size - 1]);
footer->valueSizeArray[attr - 1] =
DatumGetInt64(datumArray[Anum_cstore_stripe_attr_value_size - 1]);
}
systable_endscan_ordered(scanDescriptor);
index_close(index, NoLock);
heap_close(cstoreStripeAttrs, NoLock);
return footer;
}
/* /*
* StartModifyRelation allocates resources for modifications. * StartModifyRelation allocates resources for modifications.
*/ */
@ -760,28 +657,6 @@ ByteaToDatum(bytea *bytes, Form_pg_attribute attrForm)
} }
/*
* CStoreStripeAttrRelationId returns relation id of cstore_stripe_attr.
* TODO: should we cache this similar to citus?
*/
static Oid
CStoreStripeAttrRelationId(void)
{
return get_relname_relid("cstore_stripe_attr", CStoreNamespaceId());
}
/*
* CStoreStripeAttrRelationId returns relation id of cstore_stripe_attr_pkey.
* TODO: should we cache this similar to citus?
*/
static Oid
CStoreStripeAttrIndexRelationId(void)
{
return get_relname_relid("cstore_stripe_attr_pkey", CStoreNamespaceId());
}
/* /*
* CStoreStripesRelationId returns relation id of cstore_stripes. * CStoreStripesRelationId returns relation id of cstore_stripes.
* TODO: should we cache this similar to citus? * TODO: should we cache this similar to citus?

20
cstore_reader.c
View File

@ -39,7 +39,6 @@
/* static function declarations */ /* static function declarations */
static StripeBuffers * LoadFilteredStripeBuffers(Relation relation, static StripeBuffers * LoadFilteredStripeBuffers(Relation relation,
StripeMetadata *stripeMetadata, StripeMetadata *stripeMetadata,
StripeFooter *stripeFooter,
TupleDesc tupleDescriptor, TupleDesc tupleDescriptor,
List *projectedColumnList, List *projectedColumnList,
List *whereClauseList); List *whereClauseList);
@ -141,7 +140,6 @@ CStoreReadNextRow(TableReadState *readState, Datum *columnValues, bool *columnNu
StripeMetadata *stripeMetadata = NULL; StripeMetadata *stripeMetadata = NULL;
List *stripeMetadataList = readState->tableMetadata->stripeMetadataList; List *stripeMetadataList = readState->tableMetadata->stripeMetadataList;
uint32 stripeCount = list_length(stripeMetadataList); uint32 stripeCount = list_length(stripeMetadataList);
StripeFooter *stripeFooter = NULL;
/* if we have read all stripes, return false */ /* if we have read all stripes, return false */
if (readState->readStripeCount == stripeCount) if (readState->readStripeCount == stripeCount)
@ -154,12 +152,8 @@ CStoreReadNextRow(TableReadState *readState, Datum *columnValues, bool *columnNu
readState->blockData = NULL; readState->blockData = NULL;
stripeMetadata = list_nth(stripeMetadataList, readState->readStripeCount); stripeMetadata = list_nth(stripeMetadataList, readState->readStripeCount);
stripeFooter = ReadStripeFooter(readState->relationId,
stripeMetadata->id,
readState->tupleDescriptor->natts);
stripeBuffers = LoadFilteredStripeBuffers(readState->relation, stripeBuffers = LoadFilteredStripeBuffers(readState->relation,
stripeMetadata, stripeMetadata,
stripeFooter,
readState->tupleDescriptor, readState->tupleDescriptor,
readState->projectedColumnList, readState->projectedColumnList,
readState->whereClauseList); readState->whereClauseList);
@ -333,12 +327,11 @@ CStoreTableRowCount(Relation relation)
*/ */
static StripeBuffers * static StripeBuffers *
LoadFilteredStripeBuffers(Relation relation, StripeMetadata *stripeMetadata, LoadFilteredStripeBuffers(Relation relation, StripeMetadata *stripeMetadata,
StripeFooter *stripeFooter, TupleDesc tupleDescriptor, TupleDesc tupleDescriptor, List *projectedColumnList,
List *projectedColumnList, List *whereClauseList) List *whereClauseList)
{ {
StripeBuffers *stripeBuffers = NULL; StripeBuffers *stripeBuffers = NULL;
ColumnBuffers **columnBuffersArray = NULL; ColumnBuffers **columnBuffersArray = NULL;
uint64 currentColumnFileOffset = 0;
uint32 columnIndex = 0; uint32 columnIndex = 0;
uint32 columnCount = tupleDescriptor->natts; uint32 columnCount = tupleDescriptor->natts;
@ -358,13 +351,9 @@ LoadFilteredStripeBuffers(Relation relation, StripeMetadata *stripeMetadata,
/* load column data for projected columns */ /* load column data for projected columns */
columnBuffersArray = palloc0(columnCount * sizeof(ColumnBuffers *)); columnBuffersArray = palloc0(columnCount * sizeof(ColumnBuffers *));
currentColumnFileOffset = stripeMetadata->fileOffset;
for (columnIndex = 0; columnIndex < stripeFooter->columnCount; columnIndex++) for (columnIndex = 0; columnIndex < stripeMetadata->columnCount; columnIndex++)
{ {
uint64 existsSize = stripeFooter->existsSizeArray[columnIndex];
uint64 valueSize = stripeFooter->valueSizeArray[columnIndex];
if (projectedColumnMask[columnIndex]) if (projectedColumnMask[columnIndex])
{ {
ColumnBlockSkipNode *blockSkipNode = ColumnBlockSkipNode *blockSkipNode =
@ -379,9 +368,6 @@ LoadFilteredStripeBuffers(Relation relation, StripeMetadata *stripeMetadata,
columnBuffersArray[columnIndex] = columnBuffers; columnBuffersArray[columnIndex] = columnBuffers;
} }
currentColumnFileOffset += existsSize;
currentColumnFileOffset += valueSize;
} }
stripeBuffers = palloc0(sizeof(StripeBuffers)); stripeBuffers = palloc0(sizeof(StripeBuffers));

74
cstore_writer.c
View File

@ -34,7 +34,6 @@ static StripeSkipList * CreateEmptyStripeSkipList(uint32 stripeMaxRowCount,
uint32 blockRowCount, uint32 blockRowCount,
uint32 columnCount); uint32 columnCount);
static StripeMetadata FlushStripe(TableWriteState *writeState); static StripeMetadata FlushStripe(TableWriteState *writeState);
static StripeFooter * CreateStripeFooter(StripeSkipList *stripeSkipList);
static StringInfo SerializeBoolArray(bool *boolArray, uint32 boolArrayLength); static StringInfo SerializeBoolArray(bool *boolArray, uint32 boolArrayLength);
static void SerializeSingleDatum(StringInfo datumBuffer, Datum datum, static void SerializeSingleDatum(StringInfo datumBuffer, Datum datum,
bool datumTypeByValue, int datumTypeLength, bool datumTypeByValue, int datumTypeLength,
@ -242,7 +241,6 @@ CStoreWriteRow(TableWriteState *writeState, Datum *columnValues, bool *columnNul
MemoryContextReset(writeState->stripeWriteContext); MemoryContextReset(writeState->stripeWriteContext);
writeState->currentStripeId++; writeState->currentStripeId++;
writeState->currentStripeOffset = 0;
/* set stripe data and skip list to NULL so they are recreated next time */ /* set stripe data and skip list to NULL so they are recreated next time */
writeState->stripeBuffers = NULL; writeState->stripeBuffers = NULL;
@ -450,8 +448,6 @@ static StripeMetadata
FlushStripe(TableWriteState *writeState) FlushStripe(TableWriteState *writeState)
{ {
StripeMetadata stripeMetadata = { 0 }; StripeMetadata stripeMetadata = { 0 };
uint64 dataLength = 0;
StripeFooter *stripeFooter = NULL;
uint32 columnIndex = 0; uint32 columnIndex = 0;
uint32 blockIndex = 0; uint32 blockIndex = 0;
StripeBuffers *stripeBuffers = writeState->stripeBuffers; StripeBuffers *stripeBuffers = writeState->stripeBuffers;
@ -464,6 +460,7 @@ FlushStripe(TableWriteState *writeState)
uint32 lastBlockIndex = stripeBuffers->rowCount / blockRowCount; uint32 lastBlockIndex = stripeBuffers->rowCount / blockRowCount;
uint32 lastBlockRowCount = stripeBuffers->rowCount % blockRowCount; uint32 lastBlockRowCount = stripeBuffers->rowCount % blockRowCount;
uint64 initialFileOffset = writeState->currentFileOffset; uint64 initialFileOffset = writeState->currentFileOffset;
uint64 stripeSize = 0;
/* /*
* check if the last block needs serialization , the last block was not serialized * check if the last block needs serialization , the last block was not serialized
@ -487,16 +484,10 @@ FlushStripe(TableWriteState *writeState)
uint64 existsBufferSize = blockBuffers->existsBuffer->len; uint64 existsBufferSize = blockBuffers->existsBuffer->len;
ColumnBlockSkipNode *blockSkipNode = &blockSkipNodeArray[blockIndex]; ColumnBlockSkipNode *blockSkipNode = &blockSkipNodeArray[blockIndex];
blockSkipNode->existsBlockOffset = writeState->currentStripeOffset; blockSkipNode->existsBlockOffset = stripeSize;
blockSkipNode->existsLength = existsBufferSize; blockSkipNode->existsLength = existsBufferSize;
writeState->currentStripeOffset += existsBufferSize; stripeSize += existsBufferSize;
} }
}
for (columnIndex = 0; columnIndex < columnCount; columnIndex++)
{
ColumnBlockSkipNode *blockSkipNodeArray = columnSkipNodeArray[columnIndex];
ColumnBuffers *columnBuffers = stripeBuffers->columnBuffersArray[columnIndex];
for (blockIndex = 0; blockIndex < blockCount; blockIndex++) for (blockIndex = 0; blockIndex < blockCount; blockIndex++)
{ {
@ -506,20 +497,14 @@ FlushStripe(TableWriteState *writeState)
CompressionType valueCompressionType = blockBuffers->valueCompressionType; CompressionType valueCompressionType = blockBuffers->valueCompressionType;
ColumnBlockSkipNode *blockSkipNode = &blockSkipNodeArray[blockIndex]; ColumnBlockSkipNode *blockSkipNode = &blockSkipNodeArray[blockIndex];
blockSkipNode->valueBlockOffset = writeState->currentStripeOffset; blockSkipNode->valueBlockOffset = stripeSize;
blockSkipNode->valueLength = valueBufferSize; blockSkipNode->valueLength = valueBufferSize;
blockSkipNode->valueCompressionType = valueCompressionType; blockSkipNode->valueCompressionType = valueCompressionType;
writeState->currentStripeOffset += valueBufferSize; stripeSize += valueBufferSize;
} }
} }
/* create skip list and footer buffers */
SaveStripeSkipList(writeState->relationId, writeState->currentStripeId,
stripeSkipList, tupleDescriptor);
stripeFooter = CreateStripeFooter(stripeSkipList);
/* /*
* Each stripe has only one section: * Each stripe has only one section:
* Data section, in which we store data for each column continuously. * Data section, in which we store data for each column continuously.
@ -557,17 +542,9 @@ FlushStripe(TableWriteState *writeState)
} }
} }
/* finally, we flush the footer buffer */ /* create skip list and footer buffers */
SaveStripeFooter(writeState->relationId, SaveStripeSkipList(writeState->relationId, writeState->currentStripeId,
writeState->currentStripeId, stripeSkipList, tupleDescriptor);
stripeFooter);
/* set stripe metadata */
for (columnIndex = 0; columnIndex < columnCount; columnIndex++)
{
dataLength += stripeFooter->existsSizeArray[columnIndex];
dataLength += stripeFooter->valueSizeArray[columnIndex];
}
for (blockIndex = 0; blockIndex < blockCount; blockIndex++) for (blockIndex = 0; blockIndex < blockCount; blockIndex++)
{ {
@ -576,47 +553,16 @@ FlushStripe(TableWriteState *writeState)
} }
stripeMetadata.fileOffset = initialFileOffset; stripeMetadata.fileOffset = initialFileOffset;
stripeMetadata.dataLength = dataLength; stripeMetadata.dataLength = stripeSize;
stripeMetadata.id = writeState->currentStripeId; stripeMetadata.id = writeState->currentStripeId;
stripeMetadata.blockCount = blockCount; stripeMetadata.blockCount = blockCount;
stripeMetadata.blockRowCount = writeState->blockRowCount; stripeMetadata.blockRowCount = writeState->blockRowCount;
stripeMetadata.columnCount = columnCount;
return stripeMetadata; return stripeMetadata;
} }
/* Creates and returns the footer for given stripe. */
static StripeFooter *
CreateStripeFooter(StripeSkipList *stripeSkipList)
{
StripeFooter *stripeFooter = NULL;
uint32 columnIndex = 0;
uint32 columnCount = stripeSkipList->columnCount;
uint64 *existsSizeArray = palloc0(columnCount * sizeof(uint64));
uint64 *valueSizeArray = palloc0(columnCount * sizeof(uint64));
for (columnIndex = 0; columnIndex < columnCount; columnIndex++)
{
ColumnBlockSkipNode *blockSkipNodeArray =
stripeSkipList->blockSkipNodeArray[columnIndex];
uint32 blockIndex = 0;
for (blockIndex = 0; blockIndex < stripeSkipList->blockCount; blockIndex++)
{
existsSizeArray[columnIndex] += blockSkipNodeArray[blockIndex].existsLength;
valueSizeArray[columnIndex] += blockSkipNodeArray[blockIndex].valueLength;
}
}
stripeFooter = palloc0(sizeof(StripeFooter));
stripeFooter->columnCount = columnCount;
stripeFooter->existsSizeArray = existsSizeArray;
stripeFooter->valueSizeArray = valueSizeArray;
return stripeFooter;
}
/* /*
* SerializeBoolArray serializes the given boolean array and returns the result * SerializeBoolArray serializes the given boolean array and returns the result
* as a StringInfo. This function packs every 8 boolean values into one byte. * as a StringInfo. This function packs every 8 boolean values into one byte.