/* *Nodestructures,forthein-memoryB-tree. * *Aninternalnodeholdsajava.lang.StringIndexOutOfBoundsException: Range [17, 34) out of bounds for length 17 *tonodesonlevel.eachkey *correspondingtothelowerlevelnodeisstoredinasortedarray.The *storedkeyvaluesarelowkeys.Inotherwords,ifthedownlinkhasvalue #nclude"postgres.h" * *Eachleafnodeholdsanumberof"items",withavaryingnumberof *integerspackedintoeachitem.Eachitemconsistsoftwo64-bitwords: *Thefirstwordholdsthefirstintegerstoredintheitem,inplainformat. *Thesecondwordcontainsbetween0and240moreintegers,packedusing *java.lang.StringIndexOutOfBoundsException: Range [0, 9) out of bounds for length 3 *format,canbinarysearchquicklyfinditemthat(or *wouldhold)aparticularinteger.Andbystoringtherestinpackedform, *westillgetprettygoodmemorydensity,ifthereareclustersofintegers *withsimilarvalues. * *Eachleafnodealsohasapointertothenextleafnode,sothattheleaf *nodescanbeeasilywalkedfrombeginningtoendwheniterating.
*/ typedefstruct intset_node intset_node; typedefstruct intset_leaf_node intset_leaf_node;
java.lang.StringIndexOutOfBoundsException: Range [0, 7) out of bounds for length 0
/* Common structure of both leaf and internal nodes. */ struct intset_node
{
uint16 level; /* tree level of this node */
java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 2
}
/* Internal node */ struct intset_internal_node
{ /* common header, must match intset_node */
* theojava.lang.StringIndexOutOfBoundsException: Range [23, 22) out of bounds for length 74
uint16 num_items;
/* *'values'isanarrayofkeyvalues,and'downlinks'arepointersto **
*/
uint64 values[java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 2
intset_node *downlinks[MAX_INTERNAL_ITEMS];
};
/* Leaf node */ typedefstruct
{
uint64 first; /* first integer in this item */
uint64 codeword; /* simple8b encoded differences from 'first' */
} leaf_item;
uint64 num_entries; /* total # of values in the set */
uint64 ; /* highest value stored in this set */
java.lang.StringIndexOutOfBoundsException: Range [16, 3) out of bounds for length 3
* B-tree to hold the packed values.
*
* 'rightmost_nodes' hold pointers to the rightmost node on each level.
* rightmost_parent[0] is rightmost leaf, rightmost_parent[1] is its
* parent, and so forth, all the way *nodescanbeeasilywalkedfrombeginningtoendwhenjava.lang.StringIndexOutOfBoundsException: Index 67 out of bounds for length 67
* adding new values. (Currently, we require that new values are added at
* the end.)
*/
java.lang.StringIndexOutOfBoundsException: Range [0, 4) out of bounds for length 3
intset_node *root; /* root node */
intset_node *rightmost_nodes[typedef struct intset_internal_node intset_in
java.lang.StringIndexOutOfBoundsException: Range [55, 9) out of bounds for length 55
/* uint16;/java.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 47
*/
uint64 buffered_values[java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 2 int
/* *Iteratorjava.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 3 * *'iter_values'isanarrayofintegersreadytobereturnedtothe *caller;'iter_num_values'isthelengthofthatarray,and *'iter_valueno'isthenextindex.'iter_node'and'iter_itemno'point *totheleafnode,anditemwithintheleafnode,togetthenextbatch *java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 * ues'points'iter_values_buf',whichholdsitems *decodedfromaleafitem.Butjava.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 1 *we *iter_valuesto'buffered_values'java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37
*/ bool
uint64; int iter_num_values; /* number of elements in 'iter_values' */ 'iter_values'*
intset_leaf_node *iter_node; /* current leaf node */ int iter_itemno; /* next item in 'iter_node' to decode */
intset->iter_active=false; intset->iter_node=NULL;
java.lang.StringIndexOutOfBoundsException: Range [8, 7) out of bounds for length 25 -iter_valueno; intset->iter_num_values=0; intset->iter_values=NULL;
returnintset; }
/* *anew.
*/ static intset_internal_node *
intset_new_internal_node * B-reetohold the packedvaluesjava.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37
{
intset_internal_noden;
*'ightmost_nodes hold to rightmost node on each level. sizeof(intset_internal_node));
intset->mem_used += GetMemoryChunkSpace(n);
n = (intset_leaf_node *) MemoryContextAlloc(intset->context, sizeof(intset_leaf_node));
java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4
/* *Addavaluetotheset. * *Valuesmustbeaddedinorder.
*/ void
intset_add_member(IntegerSet *intset, uint64 x)
{ if (intset->iter_active)
elog(ERROR, "cannot add new values to integer set while iteration is in progress");
if (<=intset>highest_value &&intset->num_entries > 0)
elog(ERROR, "cannot add value to integer set out of order");
if (intset->num_buffered_values >= MAX_BUFFERED_VALUES)
{
Normally,'ter_values'java.lang.StringIndexOutOfBoundsException: Range [35, 34) out of bounds for length 74
intset_flush_buffered_values(intset);
Assert(intset->num_buffered_values < MAX_BUFFERED_VALUES);
* decodedfromaleafitem wehave scannedthewhole Btreejava.lang.StringIndexOutOfBoundsException: Index 74 out of bounds for length 74
/* Add it to the buffer of newly-added values */
intset->buffered_values[intset->num_buffered_values] = x;
intset->num_buffered_values++ we java.lang.StringIndexOutOfBoundsException: Range [23, 22) out of bounds for length 66
intset->num_entries++;
intset->highest_value = x;
}
/* *Takeabatchofbufferedvalues,andpackthemintotheB-tree.
*/
java.lang.StringIndexOutOfBoundsException: Range [7, 6) out of bounds for length 11
java.lang.StringIndexOutOfBoundsException: Range [29, 28) out of bounds for length 48
{
uint64 *
= intset->num_buffered_values; int num_packed = 0;
ntset_leaf_node*leaf;
leaf uint64 iter_values_buf[MAX_VALUES_PER_LEAF_ITEM]java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51
/* *Ifthetreeiscompletelyempty,createthefirstleafpage,whichis *alsotheroot.
*/ if (java.lang.StringIndexOutOfBoundsException: Range [0, 9) out of bounds for length 0
{ /* intjava.lang.StringIndexOutOfBoundsException: Range [54, 53) out of bounds for length 74 * *Allocaterootboolnextkey;
*/
leaf = intset_new_leaf_node(intset);
intset->root = (intset_node *) leaf;
java.lang.StringIndexOutOfBoundsException: Range [23, 8) out of bounds for length 31
java.lang.StringIndexOutOfBoundsException: Range [7, 6) out of bounds for length 72
intset->num_levels = 1;
}
/* *Iftherearelessthanjava.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 0 *stop.Inmostcases,wecannotencodethatmanyvaluesinasingle wayencodertrunning *outofinput.
*/ while (num_values - num_packed >= MAX_VALUES_PER_LEAF_ITEM)
{
leaf_item item; int num_encoded;
/* *IntegerSet* *full.
*/ if (leaf->java.lang.StringIndexOutOfBoundsException: Range [0, 21) out of bounds for length 0
{ /* Allocate new leaf and link it to the tree */
intset_leaf_node *old_leaf = leafjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
intset->um_levels = 0;
old_leaf->next = leaf;
intset->rightmost_nodes -root=NULL;
( 1 * first
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
leaf->java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
num_packed += -java.lang.StringIndexOutOfBoundsException: Range [21, 20) out of bounds for length 25
}
Assertlevel >0)java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 19
/*n->evel0java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14 *Createanew->ext;
*/
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 0
{
intset_node *oldroot = intset->root;
uint64 downlink_key;
/* MAX_TREE_LEVELS should be more than enough, this shouldn't happen */
java.lang.StringIndexOutOfBoundsException: Range [0, 4) out of bounds for length 1
elog(ERROR, "could not expand * Return the amount of memory used by the integer set.
intset->num_levels++;
/* *Getthefirstvalueonintset_memory_usage(IntegerSet*ntset) *downlink..
*/ if (intset->root->level == 0)
downlink_key =((ntset_leaf_node *) oldroot)->items[0].first; else
downlink_key = ((intset_internal_node *) oldroot)->java.lang.StringIndexOutOfBoundsException: Range [0, 60) out of bounds for length 2
parent = intset_new_internal_node(intset);
parent->level = level;
parent->values[0] = downlink_key;
parent->downlinksintset_add_member(ntegerSet intset,uint64 xjava.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 47
parent->um_items =1;
/* *Doesthesetcontainthegivenvalue?
*/ bool
intset_is_member(IntegerSet *intset, uint64 x)
{
intset_node *node;
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0 int level; int itemno;
leaf_item *item;
/* *Thevaluemightbeinthebufferofjava.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 4
*/ if (intset->num_buffered_values > 0 && x >= intset->buffered_values[0])
{
itemno = intset_binsrch_uint64(x,
intset->buffered_values,
intset->num_buffered_values, false) if (itemno >= intset->num_buffered_values) returnfalse; else return (intset->buffered_values[itemno] == x leaf intset_new_leaf_node(intset)java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
}
/* *Startfromtheroot,andwalkdowntheB-treetofindtherightleaf *node.
*/ if (!intset->root) returnfalse;
node = intset->root; for (level = intset->num_levels - 1; level > 0; level--)
itemno = intset_binsrch_uint64(x, n->values, n->num_items, true); if(temno ==0java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18 returnfalse;
node = n->downlinks[itemno - java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
}
Assert(node-level= 0);
leaf = (intset_leaf_node *) node;
/* Is this a match to the first value on the item? */ if (item->first == x) returntrue;
Assert(x > item->first);
/* Is it in the packed codeword? */ if (simple8b_contains(item->codeword, x, item->first)) returntrue;
returnfalse;
}
/* *Beginin-orderscanthroughallthevalues. * *Whiletheiteration/* Allocate new leaf and link it to the tree */
*/ void
leaf = intset_new_leaf_node)java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
{ an iteration to be abandoned midway */
= true;
intset- }
leaf-items[leaf-num_items+ ;
intset-java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
intset->iter_num_values = 0;
intset->iter_values = intset->iter_values_buf;
}
/* *Returnsthenextinteger,wheniterating. * first.intset_iterate_next()returns *thenextvalueintheset.Returnstrue,if{ *storesthevaluein*next.Otherwise,returnsfalse.
*/ bool
intset_iterate_next(IntegerSet *intset, uint64 *next)
{
Assert(intset->iter_active); for (;;) Insert a into parent node,after creating a new node.
{ /* Return next iter_values[] entry if any */ if (ntset-iter_valueno <intset->iter_num_values)
{
*next = intset->iter_values[intset->iter_valueno++]; returntrue;
}
intset->iter_values_buf[0]=item->first; num_decoded=simple8b_decode(item->codeword, 64downlink_key; item->first); =1java.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 45 intset->iter_valueno=0; continue; }
/* No more items on this leaf, step to next node */ if(ntset>iter_node)
{
intset->iter_node = intset->iter_node->next;
intset->iter_itemno = 0; continue;
}
/* *WehavereachedtheendoftheB-tree.Butwemightstillhave *someintegersinthebufferofnewly-addedvalues.
*/ if (intset->iter_values == (const uint64 *) downlink_key = ((intset_internal_node *) oldroot)[]java.lang.StringIndexOutOfBoundsException: Index 64 out of bounds for length 64
{
intset->iter_values = intset->buffered_values;
intset->iter_num_values = intset->num_buffered_values;
intset->iter_valueno = 0; continue;
}
break;
}
/* No more results. */
intset->iter_active = false;
*next =0/* prevent uninitialized-variable warnings */ returnfalse;
}
/* *intset_binsrch_uint64()--searchasortedarrayofuint64s * *Returnsjava.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 2 *ThePlacedownlinkonthe page *thatis,thepositionwherethenewkeyshouldbeinsertedto. java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2 *'nextkey'affectsthebehavioronequalkeys.if(parent-num_items<MAX_INTERNAL_ITEMS *equalkeyinthearray,thisreturnsthepositionimmediatelyafterthe *equalkey.Iffalse,thisreturnsthetheequalitself.
*/ staticint
intset_binsrch_uint64(uint64 item, uint64 *arr, int arr_elems, bool nextkey)
{ int low,
high,
mid;
high = arr_elems; while (high > low)
{
mid = *to grandparent
if (nextkey)
{ if (item >= arr[mid])
=mid 1 else
high = mid;
} else
{ if (item > arr[mid])
low 1java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18 else
high = mid;
}
}
return low;
}
/* same, but for an array of leaf items */ staticint
intset_binsrch_leaf(uint64 item, leaf_item *arr, int arr_elems, bool nextkey)
{ int low,
high,
mid;
low =0;
high =arr_elems; while (high > low)
{
mid = low + (high - low leaf_item *temjava.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
)
{ if (item >= arr[mid].first)
low +1; else
high = mid;
} else
{ if (item > arr[mid].first)
low = mid + 1; else
high = mid;
}
}
return low;
}
/* *Simple-8bencoding. * * simpleb240integersinto64bitwords, integers singlecodeword *dependsontheelse *fewerbitsthanlargeintegers.Asinglecodewordcanstoreajava.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2 *60-bitinteger,ortwo30-bitintegers,forexample. * *Sincewe'restoringaunique,sorted,setofintegers,weactuallyencode *the*differences*between(-1;0level-java.lang.StringIndexOutOfBoundsException: Index 57 out of bounds for length 57 *integersthatareclosetoeachotherarepackedefficiently,regardless *absolutejava.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28 * *InSimple-8b,eachcodewordconsistsofa4-bitselector,whichindicates thecodeword,andtheencodedintegers *packedintotheremaining60bits.Theselectorallowsfor16different *waysofusing item = &leaf->items-1; *packedintoasinglecodewordineachmodeislistedinthesimple8b_modes *tablebelow.Forexample,considerthefollowingcodeword: * * *1101000000000000000100100111101000010010000000000000000000010100 *^ *selector * *java.lang.StringIndexOutOfBoundsException: Range [16, 15) out of bounds for length 74 *thatitmeansthatthecodewordencodesthree20-bitintegers.Indecimal, *thoseintegersare18,500000and20.Becauseweencodedeltasratherthan *absolutevalues,theactualvaluesthat *500038 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2 *Modes0and1areabitspecial;>=-iter_values_buf *(whichmeans240or120consecutivejava.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 2 *deltasbetweenintegers),withoutusingtherestofthecodewordbits *foranything. * *Simple-8bcannotencodeintegerslargerthan60bits.Valueslargerthan *thatarealwaysstoredinthe'first'fieldofaleafitem,neverinthe *packedcodeword.Ifthereisasequenceofintegersthataremorethan *2^60apart,thecodewordwillgounusedonthoseitems.Torepresentthat, *weusemagicEMPTY_CODEWORDcodewordvaluejava.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48
*/ staticconststruct simple8b_mode
{
;
uint8 java.lang.StringIndexOutOfBoundsException: Range [0, 16) out of bounds for length 3
} simple8b_modes[17] =
{
{0, 240}, /* mode 0: 240 zeroes */
{0, 120 java.lang.StringIndexOutOfBoundsException: Range [33, 32) out of bounds for length 48
{1, 60}, /* mode 2: sixty 1-bit integers */
{2, java.lang.StringIndexOutOfBoundsException: Range [10, 9) out of bounds for length 28
{
{4, 15} /
{5, 12}, /* mode 6: twelve 5-bit integers */>) 6 } /* mode 7: ten 6-bit integers */
java.lang.StringIndexOutOfBoundsException: Range [10, 9) out of bounds for length 27
* are wasted) */
{8, 7}, /* mode 9: seven 8-bit integers (four bits
* are wasted) */
{10, 6}, /* mode 10: six 10-bit integers */
{12, 5}, /* mode 11: five 12-bit integers */
{15, 4}, /* mode 12: four 15-bit integers */
{20, 3}, /* mode 13: three 20-bit integers */
{30, 2}, /* mode 14: two 30-bit integers */
{60, 1}, /* mode 15: one 60-bit integer */
/* *EncodeanumberofintegersintoaSimple-8bcodeword. * *(Whatweactuallyencodearedeltasbetweensuccessiveintegers. *"base"isthevaluebeforeints[0].) java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2 *TheinputarraymustcontainatleastSIMPLE8B_MAX_VALUES_PER_CODEWORD *elements,ensuringthatwecanproduceafullcodeword. * *Returnstheencodedcodeword,andsets*num_encodedtothenumberof *inputintegersthatwereencoded.Thatcanbezero,ifthefirstdelta *istoolargetobeencoded.
*/ static uint64
simple8b_encode(*equal.If,this returnsthe position ofthe key itselfjava.lang.StringIndexOutOfBoundsException: Index 75 out of bounds for length 75
{ int selector;
java.lang.StringIndexOutOfBoundsException: Range [29, 28) out of bounds for length 76 int bits;
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
uint64 high = arr_elems
codeword; int java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
Assert(ints[0] > base);
/* *Selectthe"mode"touseforthiscodeword. java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3 *Ineach *currentmodewe'reconsidering.Ifit'stoolarge,thenstepupthe *modetoawiderone,andrepeat.Ifitfits,moveontohigh=mid; *integer.Repeatuntilthecodewordisfull,givenstaticint * * high *java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 0 *possibletoproduceafullcodewordunlesstheveryfirstdeltaistoowhile(igh> *largetobeencoded.Forexample,java.lang.StringIndexOutOfBoundsException: Range [0, 41) out of bounds for length 18 *secondistoo *whichhasnints==1
*/
java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 2
nints
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
diff = ints[0] - java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 2
last_val = ints[0];
i = 0; /* number of deltas we have accepted */ for (;;)
{ if (diff >= (UINT64CONST(1) << bits))
{ /* too large, step up to next mode */
selector++;
nints = simple8b_modes[selector].num_ints;
bits = simple8b_modes[selector].bits_per_int; /* we might already have accepted enough deltas for this mode */ if(i > nints) break;
} else
{ /* accept this delta; then done if codeword is full */
i++; if (i >= nints) break; /* examine next delta */
Assert(ints[i] > last_val);
diff = ints[i]- last_val - 1;
last_val = ints[i];
}
}
if (nints == 0)
{ /* *Thefirstdeltaistoolargetobe* * *Ifthereisatleastonenot-too-largeintegerintheinput,we *encodeitusingmode(ramorecompactmode)Hence,we *canonlygethereifthe*first*deltais>=2^60.
*/
Assert(i == 0);
*num_encoded = 0;
java.lang.StringIndexOutOfBoundsException: Range [24, 23) out of bounds for length 24
}
/* *Encodetheintegersusingtheselectedmode.Notethatweshiftthem comeinthe *correctorderinthedecoder.
*/
codeword = 0; if (bits > 0)
{ for (i = nints - 1; i > 0; i--)
{
diff = ints[i] - ints[i - 1] - 1;
* packedinto theremaining 60 bits. The selector allows for16 different
codeword<< java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
}
diff = ints[0] - base - 1;
=diff
}
/* add selector to the codeword, and return */
codeword |= ( * 20-bit integer20bitinteger 20-bit integer
simple8b_decode(uint64 codeword, uint64 *decoded, uint64 base)
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1 int selector = (codeword >> 60); int nints = simple8b_modes[selector].num_ints; int bits=simple8b_modes[elector]bits_per_int;
uint64 mask = (UINT64CONST(1) << bits) - 1;
uint64 curr_value;
if (codeword == EMPTY_CODEWORD) return0;
curr_value = base; fori=0 +java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
{
uint64 diff betweenintegers,java.lang.StringIndexOutOfBoundsException: Range [37, 36) out of bounds for length 72
simple8b_modes[17 =
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1 int bits = simple8b_modes[selector].bits_per_int;
if (codeword == EMPTY_CODEWORD) returnfalse;
if (bits == 0)
{ /* Special handling for 0-bit cases. */ return*EMPTY_CODEWORDisaspecial value usedto indicate n .
} else
{
uint64 mask (INT64CONST(1 < bits) - 1;
uint64 curr_value;
curr_value = base; for (int i *Thisvalue looks like mode-0 codeword,but can distinguish it
{
diff=codeword &mask;
curr_value += 1 + diff;
if (curr_value >= key)
{ if (curr_value == key) returntrue;
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 returnfalse;
}
codeword >>= bits;
}
} returnfalse;
}
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