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substring indexing optimization

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This commit is contained in:
Howard Chu 2005-10-23 22:38:15 +00:00
parent 34e154e28b
commit 8f5ea1f1d2
1 changed files with 51 additions and 33 deletions
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84
servers/slapd/schema_init.c
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@ -169,16 +169,13 @@ octetStringOrderingMatch(
return LDAP_SUCCESS;
}
void
hashDigestify(
static void
hashPreset(
HASH_CONTEXT *HASHcontext,
unsigned char *HASHdigest,
struct berval *prefix,
char pre,
Syntax *syntax,
MatchingRule *mr,
unsigned char *value,
int value_len)
MatchingRule *mr)
{
HASH_Init(HASHcontext);
if(prefix && prefix->bv_len > 0) {
@ -188,11 +185,21 @@ hashDigestify(
if(pre) HASH_Update(HASHcontext, (unsigned char*)&pre, sizeof(pre));
HASH_Update(HASHcontext, (unsigned char*)syntax->ssyn_oid, syntax->ssyn_oidlen);
HASH_Update(HASHcontext, (unsigned char*)mr->smr_oid, mr->smr_oidlen);
HASH_Update(HASHcontext, value, value_len);
HASH_Final(HASHdigest, HASHcontext);
return;
}
static void
hashIter(
HASH_CONTEXT *HASHcontext,
unsigned char *HASHdigest,
unsigned char *value,
int len)
{
HASH_CONTEXT ctx = *HASHcontext;
HASH_Update( &ctx, value, len );
HASH_Final( HASHdigest, &ctx );
}
/* Index generation function */
int octetStringIndexer(
slap_mask_t use,
@ -225,9 +232,10 @@ int octetStringIndexer(
slen = syntax->ssyn_oidlen;
mlen = mr->smr_oidlen;
hashPreset( &HASHcontext, prefix, 0, syntax, mr);
for( i=0; !BER_BVISNULL( &values[i] ); i++ ) {
hashDigestify( &HASHcontext, HASHdigest, prefix, 0,
syntax, mr, (unsigned char *)values[i].bv_val, values[i].bv_len );
hashIter( &HASHcontext, HASHdigest,
(unsigned char *)values[i].bv_val, values[i].bv_len );
ber_dupbv_x( &keys[i], &digest, ctx );
}
@ -263,8 +271,9 @@ int octetStringFilter(
keys = slap_sl_malloc( sizeof( struct berval ) * 2, ctx );
hashDigestify( &HASHcontext, HASHdigest, prefix, 0,
syntax, mr, (unsigned char *)value->bv_val, value->bv_len );
hashPreset( &HASHcontext, prefix, 0, syntax, mr );
hashIter( &HASHcontext, HASHdigest,
(unsigned char *)value->bv_val, value->bv_len );
ber_dupbv_x( keys, &digest, ctx );
BER_BVZERO( &keys[1] );
@ -414,7 +423,7 @@ octetStringSubstringsIndexer(
size_t slen, mlen;
BerVarray keys;
HASH_CONTEXT HASHcontext;
HASH_CONTEXT HCany, HCini, HCfin;
unsigned char HASHdigest[HASH_BYTES];
struct berval digest;
digest.bv_val = (char *)HASHdigest;
@ -460,6 +469,13 @@ octetStringSubstringsIndexer(
slen = syntax->ssyn_oidlen;
mlen = mr->smr_oidlen;
if ( flags & SLAP_INDEX_SUBSTR_ANY )
hashPreset( &HCany, prefix, SLAP_INDEX_SUBSTR_PREFIX, syntax, mr );
if( flags & SLAP_INDEX_SUBSTR_INITIAL )
hashPreset( &HCini, prefix, SLAP_INDEX_SUBSTR_INITIAL_PREFIX, syntax, mr );
if( flags & SLAP_INDEX_SUBSTR_FINAL )
hashPreset( &HCfin, prefix, SLAP_INDEX_SUBSTR_FINAL_PREFIX, syntax, mr );
nkeys = 0;
for ( i = 0; !BER_BVISNULL( &values[i] ); i++ ) {
ber_len_t j,max;
@ -467,12 +483,12 @@ octetStringSubstringsIndexer(
if( ( flags & SLAP_INDEX_SUBSTR_ANY ) &&
( values[i].bv_len >= index_substr_any_len ) )
{
char pre = SLAP_INDEX_SUBSTR_PREFIX;
max = values[i].bv_len - (index_substr_any_len - 1);
for( j=0; j<max; j++ ) {
hashDigestify( &HASHcontext, HASHdigest, prefix, pre,
syntax, mr, (unsigned char *)&values[i].bv_val[j], index_substr_any_len);
hashIter( &HCany, HASHdigest,
(unsigned char *)&values[i].bv_val[j],
index_substr_any_len );
ber_dupbv_x( &keys[nkeys++], &digest, ctx );
}
}
@ -484,19 +500,16 @@ octetStringSubstringsIndexer(
? index_substr_if_maxlen : values[i].bv_len;
for( j=index_substr_if_minlen; j<=max; j++ ) {
char pre;
if( flags & SLAP_INDEX_SUBSTR_INITIAL ) {
pre = SLAP_INDEX_SUBSTR_INITIAL_PREFIX;
hashDigestify( &HASHcontext, HASHdigest, prefix, pre,
syntax, mr, (unsigned char *)values[i].bv_val, j );
hashIter( &HCini, HASHdigest,
(unsigned char *)values[i].bv_val, j );
ber_dupbv_x( &keys[nkeys++], &digest, ctx );
}
if( flags & SLAP_INDEX_SUBSTR_FINAL ) {
pre = SLAP_INDEX_SUBSTR_FINAL_PREFIX;
hashDigestify( &HASHcontext, HASHdigest, prefix, pre,
syntax, mr, (unsigned char *)&values[i].bv_val[values[i].bv_len-j], j );
hashIter( &HCfin, HASHdigest,
(unsigned char *)&values[i].bv_val[values[i].bv_len-j], j );
ber_dupbv_x( &keys[nkeys++], &digest, ctx );
}
@ -596,8 +609,9 @@ octetStringSubstringsFilter (
klen = index_substr_if_maxlen < value->bv_len
? index_substr_if_maxlen : value->bv_len;
hashDigestify( &HASHcontext, HASHdigest, prefix, pre,
syntax, mr, (unsigned char *)value->bv_val, klen );
hashPreset( &HASHcontext, prefix, pre, syntax, mr );
hashIter( &HASHcontext, HASHdigest,
(unsigned char *)value->bv_val, klen );
ber_dupbv_x( &keys[nkeys++], &digest, ctx );
/* If initial is too long and we have subany indexed, use it
@ -607,10 +621,11 @@ octetStringSubstringsFilter (
{
ber_len_t j;
pre = SLAP_INDEX_SUBSTR_PREFIX;
hashPreset( &HASHcontext, prefix, pre, syntax, mr);
for ( j=index_substr_if_maxlen-1; j <= value->bv_len - index_substr_any_len; j+=index_substr_any_step )
{
hashDigestify( &HASHcontext, HASHdigest, prefix, pre,
syntax, mr, (unsigned char *)&value->bv_val[j], index_substr_any_len );
hashIter( &HASHcontext, HASHdigest,
(unsigned char *)&value->bv_val[j], index_substr_any_len );
ber_dupbv_x( &keys[nkeys++], &digest, ctx );
}
}
@ -628,12 +643,13 @@ octetStringSubstringsFilter (
value = &sa->sa_any[i];
hashPreset( &HASHcontext, prefix, pre, syntax, mr);
for(j=0;
j <= value->bv_len - index_substr_any_len;
j += index_substr_any_step )
{
hashDigestify( &HASHcontext, HASHdigest, prefix, pre,
syntax, mr, (unsigned char *)&value->bv_val[j], klen );
hashIter( &HASHcontext, HASHdigest,
(unsigned char *)&value->bv_val[j], klen );
ber_dupbv_x( &keys[nkeys++], &digest, ctx );
}
}
@ -649,8 +665,9 @@ octetStringSubstringsFilter (
klen = index_substr_if_maxlen < value->bv_len
? index_substr_if_maxlen : value->bv_len;
hashDigestify( &HASHcontext, HASHdigest, prefix, pre,
syntax, mr, (unsigned char *)&value->bv_val[value->bv_len-klen], klen );
hashPreset( &HASHcontext, prefix, pre, syntax, mr );
hashIter( &HASHcontext, HASHdigest,
(unsigned char *)&value->bv_val[value->bv_len-klen], klen );
ber_dupbv_x( &keys[nkeys++], &digest, ctx );
/* If final is too long and we have subany indexed, use it
@ -660,10 +677,11 @@ octetStringSubstringsFilter (
{
ber_len_t j;
pre = SLAP_INDEX_SUBSTR_PREFIX;
hashPreset( &HASHcontext, prefix, pre, syntax, mr);
for ( j=0; j <= value->bv_len - index_substr_if_maxlen; j+=index_substr_any_step )
{
hashDigestify( &HASHcontext, HASHdigest, prefix, pre,
syntax, mr, (unsigned char *)&value->bv_val[j], index_substr_any_len );
hashIter( &HASHcontext, HASHdigest,
(unsigned char *)&value->bv_val[j], index_substr_any_len );
ber_dupbv_x( &keys[nkeys++], &digest, ctx );
}
}