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Enhance the Index and Table objects so that they remember if their stats come

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from the sqlite_stat1 table.  Make the "PRAGMA stats" an SQLITE_DEBUG only
pragma.  Add the flags column to "PRAGMA stats".  These are all preliminary
steps toward a "PRAGMA analyze_ifneeded;" feature.

FossilOrigin-Name: 85026c8ee143bbd46565660fff8346ef81421546
This commit is contained in:
drh
2017-02-17 13:38:15 +00:00
parent 7898bfff26
commit 33bec3f5e8
8 changed files with 121 additions and 100 deletions
Download Patch File Download Diff File Expand all files Collapse all files
manifest
+14 -11
View File
@@ -1,5 +1,5 @@
C Fix\sa\stest\scase\sthat\swas\smade\sto\sfail\sby\sthe\sLIKE\soptimization\senhancement\nin\scheck-in\s[158290c0ab]\sbut\swhich\swent\sunnoticed\sbecause\stest\sbuilds\swere\nrunning\swith\sICU\senabled\sand\sICU\sdisables\sthe\sLIKE\soptimization.
D 2017-02-17T02:04:31.068
C Enhance\sthe\sIndex\sand\sTable\sobjects\sso\sthat\sthey\sremember\sif\stheir\sstats\scome\nfrom\sthe\ssqlite_stat1\stable.\s\sMake\sthe\s"PRAGMA\sstats"\san\sSQLITE_DEBUG\sonly\npragma.\s\sAdd\sthe\sflags\scolumn\sto\s"PRAGMA\sstats".\s\sThese\sare\sall\spreliminary\nsteps\stoward\sa\s"PRAGMA\sanalyze_ifneeded;"\sfeature.
D 2017-02-17T13:38:15.256
F Makefile.in edb6bcdd37748d2b1c3422ff727c748df7ffe918
F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
F Makefile.msc a89ea37ab5928026001569f056973b9059492fe2
@@ -331,7 +331,7 @@ F sqlite.pc.in 42b7bf0d02e08b9e77734a47798d1a55a9e0716b
F sqlite3.1 fc7ad8990fc8409983309bb80de8c811a7506786
F sqlite3.pc.in 48fed132e7cb71ab676105d2a4dc77127d8c1f3a
F src/alter.c 3b23977620ce9662ac54443f65b87ba996e36121
F src/analyze.c ac7a5d7e3cee07d074697904e00e4a8ab7b2b4f5
F src/analyze.c 1b7197d619788353437d390de42a9bccbb4aa2ac
F src/attach.c 8c476f8bd5d2afe11d925f890d30e527e5b0ce43
F src/auth.c 930b376a9c56998557367e6f7f8aaeac82a2a792
F src/backup.c faf17e60b43233c214aae6a8179d24503a61e83b
@@ -340,7 +340,7 @@ F src/btmutex.c 0e9ce2d56159b89b9bc8e197e023ee11e39ff8ca
F src/btree.c 3ae66974881e74df9909093818b4c3428f8d7982
F src/btree.h e6d352808956ec163a17f832193a3e198b3fb0ac
F src/btreeInt.h cd55d39d9916270837a88c12e701047cba0729b0
F src/build.c 9e799f1edd910dfa8a0bc29bd390d35d310596af
F src/build.c 2e05d0360568f40dc583461f2211f020ff282ee4
F src/callback.c 2e76147783386374bf01b227f752c81ec872d730
F src/complete.c a3634ab1e687055cd002e11b8f43eb75c17da23e
F src/ctime.c a9984df73898c042a5cfc8f9d8e7723d02bc35c9
@@ -387,8 +387,8 @@ F src/parse.y 591704fce84f814d9a3642774c1f011d38f4149c
F src/pcache.c 62835bed959e2914edd26afadfecce29ece0e870
F src/pcache.h 2cedcd8407eb23017d92790b112186886e179490
F src/pcache1.c e3967219b2a92b9edcb9324a4ba75009090d3953
F src/pragma.c 7831956012f5d764761fbd023e59b0ffc08f5e8d
F src/pragma.h 61aa5389118594bebb28120a6720401aee34ce1a
F src/pragma.c d4918a737f0bf1ad825654ebf07c4d009ff0ca63
F src/pragma.h cea24a631982fd1a26fcddd46f596d22303b4247
F src/prepare.c b1140c3d0cf59bc85ace00ce363153041b424b7a
F src/printf.c 67427bbee66d891fc6f6f5aada857e9cdb368c1c
F src/random.c 80f5d666f23feb3e6665a6ce04c7197212a88384
@@ -399,7 +399,7 @@ F src/shell.c bb8e20789499aec921a01d8744c616b81b8214f1
F src/sqlite.h.in 751ff125eb159c8f92c182b8df980a5e4f50e966
F src/sqlite3.rc 5121c9e10c3964d5755191c80dd1180c122fc3a8
F src/sqlite3ext.h 8648034aa702469afb553231677306cc6492a1ae
F src/sqliteInt.h 46fe8e5aee3825d77fa771216ef263dc947030e7
F src/sqliteInt.h 54bc20855f2a1a99a1b726f1384b5ce9ab67a0ff
F src/sqliteLimit.h c0373387c287c8d0932510b5547ecde31b5da247
F src/status.c a9e66593dfb28a9e746cba7153f84d49c1ddc4b1
F src/table.c b46ad567748f24a326d9de40e5b9659f96ffff34
@@ -1494,7 +1494,7 @@ F tool/mkmsvcmin.tcl 95b37e202cbed873aa8ffdbb493b9db45927be2b
F tool/mkopcodec.tcl d1b6362bd3aa80d5520d4d6f3765badf01f6c43c
F tool/mkopcodeh.tcl a01d2c1d8a6205b03fc635adf3735b4c523befd3
F tool/mkopts.tcl 66ac10d240cc6e86abd37dc908d50382f84ff46e
F tool/mkpragmatab.tcl ebb4bfcd2f8010e0a3934b6118db4b5f2f5edf5c
F tool/mkpragmatab.tcl 9c0a855e0daf83e54ffd9fd438260cd0c92f25d0
F tool/mkspeedsql.tcl a1a334d288f7adfe6e996f2e712becf076745c97
F tool/mksqlite3c-noext.tcl fef88397668ae83166735c41af99d79f56afaabb
F tool/mksqlite3c.tcl 06b2e6a0f21cc0a5d70fbbd136b3e0a96470645e
@@ -1556,7 +1556,10 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
P 8a03be1dc42737ba0712d33f639ea26dc243b20e
R b29803fdd4fd514ba7baa53a58b26311
P 218b2bbb0de07288889f6762d4461ea8acd78969
R af8aeffdf276070e8e8912906300a1a4
T *branch * auto-analyze
T *sym-auto-analyze *
T -sym-trunk *
U drh
Z af65459984ca8c135fabce3c62812860
Z f8720207819c88fb362c87de069d287a
manifest.uuid
+1 -1
View File
@@ -1 +1 @@
218b2bbb0de07288889f6762d4461ea8acd78969
85026c8ee143bbd46565660fff8346ef81421546
src/analyze.c
+16 -6
View File
@@ -1532,7 +1532,11 @@ static int analysisLoader(void *pData, int argc, char **argv, char **NotUsed){
#endif
pIndex->bUnordered = 0;
decodeIntArray((char*)z, nCol, aiRowEst, pIndex->aiRowLogEst, pIndex);
if( pIndex->pPartIdxWhere==0 ) pTable->nRowLogEst = pIndex->aiRowLogEst[0];
pIndex->hasStat1 = 1;
if( pIndex->pPartIdxWhere==0 ){
pTable->nRowLogEst = pIndex->aiRowLogEst[0];
pTable->tabFlags |= TF_HasStat1;
}
}else{
Index fakeIdx;
fakeIdx.szIdxRow = pTable->szTabRow;
@@ -1541,6 +1545,7 @@ static int analysisLoader(void *pData, int argc, char **argv, char **NotUsed){
#endif
decodeIntArray((char*)z, 1, 0, &pTable->nRowLogEst, &fakeIdx);
pTable->szTabRow = fakeIdx.szIdxRow;
pTable->tabFlags |= TF_HasStat1;
}
return 0;
@@ -1835,15 +1840,20 @@ int sqlite3AnalysisLoad(sqlite3 *db, int iDb){
HashElem *i;
char *zSql;
int rc = SQLITE_OK;
Schema *pSchema = db->aDb[iDb].pSchema;
assert( iDb>=0 && iDb<db->nDb );
assert( db->aDb[iDb].pBt!=0 );
/* Clear any prior statistics */
assert( sqlite3SchemaMutexHeld(db, iDb, 0) );
for(i=sqliteHashFirst(&db->aDb[iDb].pSchema->idxHash);i;i=sqliteHashNext(i)){
for(i=sqliteHashFirst(&pSchema->tblHash); i; i=sqliteHashNext(i)){
Table *pTab = sqliteHashData(i);
pTab->tabFlags &= ~TF_HasStat1;
}
for(i=sqliteHashFirst(&pSchema->idxHash); i; i=sqliteHashNext(i)){
Index *pIdx = sqliteHashData(i);
pIdx->aiRowLogEst[0] = 0;
pIdx->hasStat1 = 0;
#ifdef SQLITE_ENABLE_STAT3_OR_STAT4
sqlite3DeleteIndexSamples(db, pIdx);
pIdx->aSample = 0;
@@ -1866,9 +1876,9 @@ int sqlite3AnalysisLoad(sqlite3 *db, int iDb){
/* Set appropriate defaults on all indexes not in the sqlite_stat1 table */
assert( sqlite3SchemaMutexHeld(db, iDb, 0) );
for(i=sqliteHashFirst(&db->aDb[iDb].pSchema->idxHash);i;i=sqliteHashNext(i)){
for(i=sqliteHashFirst(&pSchema->idxHash); i; i=sqliteHashNext(i)){
Index *pIdx = sqliteHashData(i);
if( pIdx->aiRowLogEst[0]==0 ) sqlite3DefaultRowEst(pIdx);
if( !pIdx->hasStat1 ) sqlite3DefaultRowEst(pIdx);
}
/* Load the statistics from the sqlite_stat4 table. */
@@ -1878,7 +1888,7 @@ int sqlite3AnalysisLoad(sqlite3 *db, int iDb){
rc = loadStat4(db, sInfo.zDatabase);
db->lookaside.bDisable--;
}
for(i=sqliteHashFirst(&db->aDb[iDb].pSchema->idxHash);i;i=sqliteHashNext(i)){
for(i=sqliteHashFirst(&pSchema->idxHash); i; i=sqliteHashNext(i)){
Index *pIdx = sqliteHashData(i);
sqlite3_free(pIdx->aiRowEst);
pIdx->aiRowEst = 0;
src/build.c
+3
View File
@@ -3454,6 +3454,9 @@ void sqlite3DefaultRowEst(Index *pIdx){
int nCopy = MIN(ArraySize(aVal), pIdx->nKeyCol);
int i;
/* Indexes with default row estimates should not have stat1 data */
assert( !pIdx->hasStat1 );
/* Set the first entry (number of rows in the index) to the estimated
** number of rows in the table, or half the number of rows in the table
** for a partial index. But do not let the estimate drop below 10. */
src/pragma.c
+11 -7
View File
@@ -1098,29 +1098,33 @@ void sqlite3Pragma(
}
break;
#ifdef SQLITE_DEBUG
case PragTyp_STATS: {
Index *pIdx;
HashElem *i;
pParse->nMem = 4;
pParse->nMem = 5;
sqlite3CodeVerifySchema(pParse, iDb);
for(i=sqliteHashFirst(&pDb->pSchema->tblHash); i; i=sqliteHashNext(i)){
Table *pTab = sqliteHashData(i);
sqlite3VdbeMultiLoad(v, 1, "ssii",
sqlite3VdbeMultiLoad(v, 1, "ssiii",
pTab->zName,
0,
pTab->szTabRow,
pTab->nRowLogEst);
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 4);
pTab->nRowLogEst,
pTab->tabFlags);
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 5);
for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){
sqlite3VdbeMultiLoad(v, 2, "sii",
sqlite3VdbeMultiLoad(v, 2, "siii",
pIdx->zName,
pIdx->szIdxRow,
pIdx->aiRowLogEst[0]);
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 4);
pIdx->aiRowLogEst[0],
pIdx->hasStat1);
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 5);
}
}
}
break;
#endif
case PragTyp_INDEX_INFO: if( zRight ){
Index *pIdx;
src/pragma.h
+65 -64
View File
@@ -34,20 +34,20 @@
#define PragTyp_SECURE_DELETE 26
#define PragTyp_SHRINK_MEMORY 27
#define PragTyp_SOFT_HEAP_LIMIT 28
#define PragTyp_STATS 29
#define PragTyp_SYNCHRONOUS 30
#define PragTyp_TABLE_INFO 31
#define PragTyp_TEMP_STORE 32
#define PragTyp_TEMP_STORE_DIRECTORY 33
#define PragTyp_THREADS 34
#define PragTyp_WAL_AUTOCHECKPOINT 35
#define PragTyp_WAL_CHECKPOINT 36
#define PragTyp_ACTIVATE_EXTENSIONS 37
#define PragTyp_HEXKEY 38
#define PragTyp_KEY 39
#define PragTyp_REKEY 40
#define PragTyp_LOCK_STATUS 41
#define PragTyp_PARSER_TRACE 42
#define PragTyp_SYNCHRONOUS 29
#define PragTyp_TABLE_INFO 30
#define PragTyp_TEMP_STORE 31
#define PragTyp_TEMP_STORE_DIRECTORY 32
#define PragTyp_THREADS 33
#define PragTyp_WAL_AUTOCHECKPOINT 34
#define PragTyp_WAL_CHECKPOINT 35
#define PragTyp_ACTIVATE_EXTENSIONS 36
#define PragTyp_HEXKEY 37
#define PragTyp_KEY 38
#define PragTyp_REKEY 39
#define PragTyp_LOCK_STATUS 40
#define PragTyp_PARSER_TRACE 41
#define PragTyp_STATS 42
/* Property flags associated with various pragma. */
#define PragFlg_NeedSchema 0x01 /* Force schema load before running */
@@ -75,43 +75,44 @@ static const char *const pragCName[] = {
/* 8 */ "index",
/* 9 */ "width",
/* 10 */ "height",
/* 11 */ "seqno", /* Used by: index_info */
/* 12 */ "cid",
/* 13 */ "name",
/* 14 */ "seqno", /* Used by: index_xinfo */
/* 15 */ "cid",
/* 16 */ "name",
/* 17 */ "desc",
/* 18 */ "coll",
/* 19 */ "key",
/* 20 */ "seq", /* Used by: index_list */
/* 21 */ "name",
/* 22 */ "unique",
/* 23 */ "origin",
/* 24 */ "partial",
/* 25 */ "seq", /* Used by: database_list */
/* 26 */ "name",
/* 27 */ "file",
/* 28 */ "seq", /* Used by: collation_list */
/* 29 */ "name",
/* 30 */ "id", /* Used by: foreign_key_list */
/* 31 */ "seq",
/* 32 */ "table",
/* 33 */ "from",
/* 34 */ "to",
/* 35 */ "on_update",
/* 36 */ "on_delete",
/* 37 */ "match",
/* 38 */ "table", /* Used by: foreign_key_check */
/* 39 */ "rowid",
/* 40 */ "parent",
/* 41 */ "fkid",
/* 42 */ "busy", /* Used by: wal_checkpoint */
/* 43 */ "log",
/* 44 */ "checkpointed",
/* 45 */ "timeout", /* Used by: busy_timeout */
/* 46 */ "database", /* Used by: lock_status */
/* 47 */ "status",
/* 11 */ "flags",
/* 12 */ "seqno", /* Used by: index_info */
/* 13 */ "cid",
/* 14 */ "name",
/* 15 */ "seqno", /* Used by: index_xinfo */
/* 16 */ "cid",
/* 17 */ "name",
/* 18 */ "desc",
/* 19 */ "coll",
/* 20 */ "key",
/* 21 */ "seq", /* Used by: index_list */
/* 22 */ "name",
/* 23 */ "unique",
/* 24 */ "origin",
/* 25 */ "partial",
/* 26 */ "seq", /* Used by: database_list */
/* 27 */ "name",
/* 28 */ "file",
/* 29 */ "seq", /* Used by: collation_list */
/* 30 */ "name",
/* 31 */ "id", /* Used by: foreign_key_list */
/* 32 */ "seq",
/* 33 */ "table",
/* 34 */ "from",
/* 35 */ "to",
/* 36 */ "on_update",
/* 37 */ "on_delete",
/* 38 */ "match",
/* 39 */ "table", /* Used by: foreign_key_check */
/* 40 */ "rowid",
/* 41 */ "parent",
/* 42 */ "fkid",
/* 43 */ "busy", /* Used by: wal_checkpoint */
/* 44 */ "log",
/* 45 */ "checkpointed",
/* 46 */ "timeout", /* Used by: busy_timeout */
/* 47 */ "database", /* Used by: lock_status */
/* 48 */ "status",
};
/* Definitions of all built-in pragmas */
@@ -157,7 +158,7 @@ static const PragmaName aPragmaName[] = {
{/* zName: */ "busy_timeout",
/* ePragTyp: */ PragTyp_BUSY_TIMEOUT,
/* ePragFlg: */ PragFlg_Result0,
/* ColNames: */ 45, 1,
/* ColNames: */ 46, 1,
/* iArg: */ 0 },
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
{/* zName: */ "cache_size",
@@ -194,7 +195,7 @@ static const PragmaName aPragmaName[] = {
{/* zName: */ "collation_list",
/* ePragTyp: */ PragTyp_COLLATION_LIST,
/* ePragFlg: */ PragFlg_Result0,
/* ColNames: */ 28, 2,
/* ColNames: */ 29, 2,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_COMPILEOPTION_DIAGS)
@@ -229,7 +230,7 @@ static const PragmaName aPragmaName[] = {
{/* zName: */ "database_list",
/* ePragTyp: */ PragTyp_DATABASE_LIST,
/* ePragFlg: */ PragFlg_NeedSchema|PragFlg_Result0,
/* ColNames: */ 25, 3,
/* ColNames: */ 26, 3,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS) && !defined(SQLITE_OMIT_DEPRECATED)
@@ -266,14 +267,14 @@ static const PragmaName aPragmaName[] = {
{/* zName: */ "foreign_key_check",
/* ePragTyp: */ PragTyp_FOREIGN_KEY_CHECK,
/* ePragFlg: */ PragFlg_NeedSchema,
/* ColNames: */ 38, 4,
/* ColNames: */ 39, 4,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_FOREIGN_KEY)
{/* zName: */ "foreign_key_list",
/* ePragTyp: */ PragTyp_FOREIGN_KEY_LIST,
/* ePragFlg: */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
/* ColNames: */ 30, 8,
/* ColNames: */ 31, 8,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
@@ -336,17 +337,17 @@ static const PragmaName aPragmaName[] = {
{/* zName: */ "index_info",
/* ePragTyp: */ PragTyp_INDEX_INFO,
/* ePragFlg: */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
/* ColNames: */ 11, 3,
/* ColNames: */ 12, 3,
/* iArg: */ 0 },
{/* zName: */ "index_list",
/* ePragTyp: */ PragTyp_INDEX_LIST,
/* ePragFlg: */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
/* ColNames: */ 20, 5,
/* ColNames: */ 21, 5,
/* iArg: */ 0 },
{/* zName: */ "index_xinfo",
/* ePragTyp: */ PragTyp_INDEX_INFO,
/* ePragFlg: */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
/* ColNames: */ 14, 6,
/* ColNames: */ 15, 6,
/* iArg: */ 1 },
#endif
#if !defined(SQLITE_OMIT_INTEGRITY_CHECK)
@@ -393,7 +394,7 @@ static const PragmaName aPragmaName[] = {
{/* zName: */ "lock_status",
/* ePragTyp: */ PragTyp_LOCK_STATUS,
/* ePragFlg: */ PragFlg_Result0,
/* ColNames: */ 46, 2,
/* ColNames: */ 47, 2,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
@@ -510,11 +511,11 @@ static const PragmaName aPragmaName[] = {
/* iArg: */ SQLITE_SqlTrace },
#endif
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS) && defined(SQLITE_DEBUG)
{/* zName: */ "stats",
/* ePragTyp: */ PragTyp_STATS,
/* ePragFlg: */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq,
/* ColNames: */ 7, 4,
/* ColNames: */ 7, 5,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
@@ -593,7 +594,7 @@ static const PragmaName aPragmaName[] = {
{/* zName: */ "wal_checkpoint",
/* ePragTyp: */ PragTyp_WAL_CHECKPOINT,
/* ePragFlg: */ PragFlg_NeedSchema,
/* ColNames: */ 42, 3,
/* ColNames: */ 43, 3,
/* iArg: */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
@@ -604,4 +605,4 @@ static const PragmaName aPragmaName[] = {
/* iArg: */ SQLITE_WriteSchema|SQLITE_RecoveryMode },
#endif
};
/* Number of pragmas: 60 on by default, 73 total. */
/* Number of pragmas: 59 on by default, 73 total. */
src/sqliteInt.h
+9 -9
View File
@@ -1879,15 +1879,14 @@ struct Table {
** the TF_OOOHidden attribute would apply in this case. Such tables require
** special handling during INSERT processing.
*/
#define TF_Readonly 0x01 /* Read-only system table */
#define TF_Ephemeral 0x02 /* An ephemeral table */
#define TF_HasPrimaryKey 0x04 /* Table has a primary key */
#define TF_Autoincrement 0x08 /* Integer primary key is autoincrement */
/* available for reuse: 0x10 */
#define TF_WithoutRowid 0x20 /* No rowid. PRIMARY KEY is the key */
#define TF_NoVisibleRowid 0x40 /* No user-visible "rowid" column */
#define TF_OOOHidden 0x80 /* Out-of-Order hidden columns */
#define TF_Readonly 0x0001 /* Read-only system table */
#define TF_Ephemeral 0x0002 /* An ephemeral table */
#define TF_HasPrimaryKey 0x0004 /* Table has a primary key */
#define TF_Autoincrement 0x0008 /* Integer primary key is autoincrement */
#define TF_HasStat1 0x0010 /* Has STAT1 data */
#define TF_WithoutRowid 0x0020 /* No rowid. PRIMARY KEY is the key */
#define TF_NoVisibleRowid 0x0040 /* No user-visible "rowid" column */
#define TF_OOOHidden 0x0080 /* Out-of-Order hidden columns */
/*
** Test to see whether or not a table is a virtual table. This is
@@ -2130,6 +2129,7 @@ struct Index {
unsigned isResized:1; /* True if resizeIndexObject() has been called */
unsigned isCovering:1; /* True if this is a covering index */
unsigned noSkipScan:1; /* Do not try to use skip-scan if true */
unsigned hasStat1:1; /* True if stat1 data has been loaded */
#ifdef SQLITE_ENABLE_STAT3_OR_STAT4
int nSample; /* Number of elements in aSample[] */
int nSampleCol; /* Size of IndexSample.anEq[] and so on */
tool/mkpragmatab.tcl
+2 -2
View File
@@ -225,8 +225,8 @@ set pragma_def {
NAME: stats
FLAG: NeedSchema Result0 SchemaReq
COLS: table index width height
IF: !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
COLS: table index width height flags
IF: !defined(SQLITE_OMIT_SCHEMA_PRAGMAS) && defined(SQLITE_DEBUG)
NAME: index_info
TYPE: INDEX_INFO