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| 1 /* | |
| 2 ** 2009 Nov 12 | |
| 3 ** | |
| 4 ** The author disclaims copyright to this source code. In place of | |
| 5 ** a legal notice, here is a blessing: | |
| 6 ** | |
| 7 ** May you do good and not evil. | |
| 8 ** May you find forgiveness for yourself and forgive others. | |
| 9 ** May you share freely, never taking more than you give. | |
| 10 ** | |
| 11 ****************************************************************************** | |
| 12 ** | |
| 13 */ | |
| 14 #ifndef _FTSINT_H | |
| 15 #define _FTSINT_H | |
| 16 | |
| 17 #if !defined(NDEBUG) && !defined(SQLITE_DEBUG) | |
| 18 # define NDEBUG 1 | |
| 19 #endif | |
| 20 | |
| 21 /* | |
| 22 ** FTS4 is really an extension for FTS3. It is enabled using the | |
| 23 ** SQLITE_ENABLE_FTS3 macro. But to avoid confusion we also all | |
| 24 ** the SQLITE_ENABLE_FTS4 macro to serve as an alisse for SQLITE_ENABLE_FTS3. | |
| 25 */ | |
| 26 #if defined(SQLITE_ENABLE_FTS4) && !defined(SQLITE_ENABLE_FTS3) | |
| 27 # define SQLITE_ENABLE_FTS3 | |
| 28 #endif | |
| 29 | |
| 30 #if !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_FTS3) | |
| 31 | |
| 32 /* If not building as part of the core, include sqlite3ext.h. */ | |
| 33 #ifndef SQLITE_CORE | |
| 34 # include "sqlite3ext.h" | |
| 35 SQLITE_EXTENSION_INIT3 | |
| 36 #endif | |
| 37 | |
| 38 #include "sqlite3.h" | |
| 39 #include "fts3_tokenizer.h" | |
| 40 #include "fts3_hash.h" | |
| 41 | |
| 42 /* | |
| 43 ** This constant determines the maximum depth of an FTS expression tree | |
| 44 ** that the library will create and use. FTS uses recursion to perform | |
| 45 ** various operations on the query tree, so the disadvantage of a large | |
| 46 ** limit is that it may allow very large queries to use large amounts | |
| 47 ** of stack space (perhaps causing a stack overflow). | |
| 48 */ | |
| 49 #ifndef SQLITE_FTS3_MAX_EXPR_DEPTH | |
| 50 # define SQLITE_FTS3_MAX_EXPR_DEPTH 12 | |
| 51 #endif | |
| 52 | |
| 53 | |
| 54 /* | |
| 55 ** This constant controls how often segments are merged. Once there are | |
| 56 ** FTS3_MERGE_COUNT segments of level N, they are merged into a single | |
| 57 ** segment of level N+1. | |
| 58 */ | |
| 59 #define FTS3_MERGE_COUNT 16 | |
| 60 | |
| 61 /* | |
| 62 ** This is the maximum amount of data (in bytes) to store in the | |
| 63 ** Fts3Table.pendingTerms hash table. Normally, the hash table is | |
| 64 ** populated as documents are inserted/updated/deleted in a transaction | |
| 65 ** and used to create a new segment when the transaction is committed. | |
| 66 ** However if this limit is reached midway through a transaction, a new | |
| 67 ** segment is created and the hash table cleared immediately. | |
| 68 */ | |
| 69 #define FTS3_MAX_PENDING_DATA (1*1024*1024) | |
| 70 | |
| 71 /* | |
| 72 ** Macro to return the number of elements in an array. SQLite has a | |
| 73 ** similar macro called ArraySize(). Use a different name to avoid | |
| 74 ** a collision when building an amalgamation with built-in FTS3. | |
| 75 */ | |
| 76 #define SizeofArray(X) ((int)(sizeof(X)/sizeof(X[0]))) | |
| 77 | |
| 78 | |
| 79 #ifndef MIN | |
| 80 # define MIN(x,y) ((x)<(y)?(x):(y)) | |
| 81 #endif | |
| 82 #ifndef MAX | |
| 83 # define MAX(x,y) ((x)>(y)?(x):(y)) | |
| 84 #endif | |
| 85 | |
| 86 /* | |
| 87 ** Maximum length of a varint encoded integer. The varint format is different | |
| 88 ** from that used by SQLite, so the maximum length is 10, not 9. | |
| 89 */ | |
| 90 #define FTS3_VARINT_MAX 10 | |
| 91 | |
| 92 /* | |
| 93 ** FTS4 virtual tables may maintain multiple indexes - one index of all terms | |
| 94 ** in the document set and zero or more prefix indexes. All indexes are stored | |
| 95 ** as one or more b+-trees in the %_segments and %_segdir tables. | |
| 96 ** | |
| 97 ** It is possible to determine which index a b+-tree belongs to based on the | |
| 98 ** value stored in the "%_segdir.level" column. Given this value L, the index | |
| 99 ** that the b+-tree belongs to is (L<<10). In other words, all b+-trees with | |
| 100 ** level values between 0 and 1023 (inclusive) belong to index 0, all levels | |
| 101 ** between 1024 and 2047 to index 1, and so on. | |
| 102 ** | |
| 103 ** It is considered impossible for an index to use more than 1024 levels. In | |
| 104 ** theory though this may happen, but only after at least | |
| 105 ** (FTS3_MERGE_COUNT^1024) separate flushes of the pending-terms tables. | |
| 106 */ | |
| 107 #define FTS3_SEGDIR_MAXLEVEL 1024 | |
| 108 #define FTS3_SEGDIR_MAXLEVEL_STR "1024" | |
| 109 | |
| 110 /* | |
| 111 ** The testcase() macro is only used by the amalgamation. If undefined, | |
| 112 ** make it a no-op. | |
| 113 */ | |
| 114 #ifndef testcase | |
| 115 # define testcase(X) | |
| 116 #endif | |
| 117 | |
| 118 /* | |
| 119 ** Terminator values for position-lists and column-lists. | |
| 120 */ | |
| 121 #define POS_COLUMN (1) /* Column-list terminator */ | |
| 122 #define POS_END (0) /* Position-list terminator */ | |
| 123 | |
| 124 /* | |
| 125 ** This section provides definitions to allow the | |
| 126 ** FTS3 extension to be compiled outside of the | |
| 127 ** amalgamation. | |
| 128 */ | |
| 129 #ifndef SQLITE_AMALGAMATION | |
| 130 /* | |
| 131 ** Macros indicating that conditional expressions are always true or | |
| 132 ** false. | |
| 133 */ | |
| 134 #ifdef SQLITE_COVERAGE_TEST | |
| 135 # define ALWAYS(x) (1) | |
| 136 # define NEVER(X) (0) | |
| 137 #else | |
| 138 # define ALWAYS(x) (x) | |
| 139 # define NEVER(x) (x) | |
| 140 #endif | |
| 141 | |
| 142 /* | |
| 143 ** Internal types used by SQLite. | |
| 144 */ | |
| 145 typedef unsigned char u8; /* 1-byte (or larger) unsigned integer */ | |
| 146 typedef short int i16; /* 2-byte (or larger) signed integer */ | |
| 147 typedef unsigned int u32; /* 4-byte unsigned integer */ | |
| 148 typedef sqlite3_uint64 u64; /* 8-byte unsigned integer */ | |
| 149 typedef sqlite3_int64 i64; /* 8-byte signed integer */ | |
| 150 | |
| 151 /* | |
| 152 ** Macro used to suppress compiler warnings for unused parameters. | |
| 153 */ | |
| 154 #define UNUSED_PARAMETER(x) (void)(x) | |
| 155 | |
| 156 /* | |
| 157 ** Activate assert() only if SQLITE_TEST is enabled. | |
| 158 */ | |
| 159 #if !defined(NDEBUG) && !defined(SQLITE_DEBUG) | |
| 160 # define NDEBUG 1 | |
| 161 #endif | |
| 162 | |
| 163 /* | |
| 164 ** The TESTONLY macro is used to enclose variable declarations or | |
| 165 ** other bits of code that are needed to support the arguments | |
| 166 ** within testcase() and assert() macros. | |
| 167 */ | |
| 168 #if defined(SQLITE_DEBUG) || defined(SQLITE_COVERAGE_TEST) | |
| 169 # define TESTONLY(X) X | |
| 170 #else | |
| 171 # define TESTONLY(X) | |
| 172 #endif | |
| 173 | |
| 174 #endif /* SQLITE_AMALGAMATION */ | |
| 175 | |
| 176 #ifdef SQLITE_DEBUG | |
| 177 int sqlite3Fts3Corrupt(void); | |
| 178 # define FTS_CORRUPT_VTAB sqlite3Fts3Corrupt() | |
| 179 #else | |
| 180 # define FTS_CORRUPT_VTAB SQLITE_CORRUPT_VTAB | |
| 181 #endif | |
| 182 | |
| 183 typedef struct Fts3Table Fts3Table; | |
| 184 typedef struct Fts3Cursor Fts3Cursor; | |
| 185 typedef struct Fts3Expr Fts3Expr; | |
| 186 typedef struct Fts3Phrase Fts3Phrase; | |
| 187 typedef struct Fts3PhraseToken Fts3PhraseToken; | |
| 188 | |
| 189 typedef struct Fts3Doclist Fts3Doclist; | |
| 190 typedef struct Fts3SegFilter Fts3SegFilter; | |
| 191 typedef struct Fts3DeferredToken Fts3DeferredToken; | |
| 192 typedef struct Fts3SegReader Fts3SegReader; | |
| 193 typedef struct Fts3MultiSegReader Fts3MultiSegReader; | |
| 194 | |
| 195 /* | |
| 196 ** A connection to a fulltext index is an instance of the following | |
| 197 ** structure. The xCreate and xConnect methods create an instance | |
| 198 ** of this structure and xDestroy and xDisconnect free that instance. | |
| 199 ** All other methods receive a pointer to the structure as one of their | |
| 200 ** arguments. | |
| 201 */ | |
| 202 struct Fts3Table { | |
| 203 sqlite3_vtab base; /* Base class used by SQLite core */ | |
| 204 sqlite3 *db; /* The database connection */ | |
| 205 const char *zDb; /* logical database name */ | |
| 206 const char *zName; /* virtual table name */ | |
| 207 int nColumn; /* number of named columns in virtual table */ | |
| 208 char **azColumn; /* column names. malloced */ | |
| 209 u8 *abNotindexed; /* True for 'notindexed' columns */ | |
| 210 sqlite3_tokenizer *pTokenizer; /* tokenizer for inserts and queries */ | |
| 211 char *zContentTbl; /* content=xxx option, or NULL */ | |
| 212 char *zLanguageid; /* languageid=xxx option, or NULL */ | |
| 213 int nAutoincrmerge; /* Value configured by 'automerge' */ | |
| 214 u32 nLeafAdd; /* Number of leaf blocks added this trans */ | |
| 215 | |
| 216 /* Precompiled statements used by the implementation. Each of these | |
| 217 ** statements is run and reset within a single virtual table API call. | |
| 218 */ | |
| 219 sqlite3_stmt *aStmt[40]; | |
| 220 | |
| 221 char *zReadExprlist; | |
| 222 char *zWriteExprlist; | |
| 223 | |
| 224 int nNodeSize; /* Soft limit for node size */ | |
| 225 u8 bFts4; /* True for FTS4, false for FTS3 */ | |
| 226 u8 bHasStat; /* True if %_stat table exists (2==unknown) */ | |
| 227 u8 bHasDocsize; /* True if %_docsize table exists */ | |
| 228 u8 bDescIdx; /* True if doclists are in reverse order */ | |
| 229 u8 bIgnoreSavepoint; /* True to ignore xSavepoint invocations */ | |
| 230 int nPgsz; /* Page size for host database */ | |
| 231 char *zSegmentsTbl; /* Name of %_segments table */ | |
| 232 sqlite3_blob *pSegments; /* Blob handle open on %_segments table */ | |
| 233 | |
| 234 /* | |
| 235 ** The following array of hash tables is used to buffer pending index | |
| 236 ** updates during transactions. All pending updates buffered at any one | |
| 237 ** time must share a common language-id (see the FTS4 langid= feature). | |
| 238 ** The current language id is stored in variable iPrevLangid. | |
| 239 ** | |
| 240 ** A single FTS4 table may have multiple full-text indexes. For each index | |
| 241 ** there is an entry in the aIndex[] array. Index 0 is an index of all the | |
| 242 ** terms that appear in the document set. Each subsequent index in aIndex[] | |
| 243 ** is an index of prefixes of a specific length. | |
| 244 ** | |
| 245 ** Variable nPendingData contains an estimate the memory consumed by the | |
| 246 ** pending data structures, including hash table overhead, but not including | |
| 247 ** malloc overhead. When nPendingData exceeds nMaxPendingData, all hash | |
| 248 ** tables are flushed to disk. Variable iPrevDocid is the docid of the most | |
| 249 ** recently inserted record. | |
| 250 */ | |
| 251 int nIndex; /* Size of aIndex[] */ | |
| 252 struct Fts3Index { | |
| 253 int nPrefix; /* Prefix length (0 for main terms index) */ | |
| 254 Fts3Hash hPending; /* Pending terms table for this index */ | |
| 255 } *aIndex; | |
| 256 int nMaxPendingData; /* Max pending data before flush to disk */ | |
| 257 int nPendingData; /* Current bytes of pending data */ | |
| 258 sqlite_int64 iPrevDocid; /* Docid of most recently inserted document */ | |
| 259 int iPrevLangid; /* Langid of recently inserted document */ | |
| 260 | |
| 261 #if defined(SQLITE_DEBUG) || defined(SQLITE_COVERAGE_TEST) | |
| 262 /* State variables used for validating that the transaction control | |
| 263 ** methods of the virtual table are called at appropriate times. These | |
| 264 ** values do not contribute to FTS functionality; they are used for | |
| 265 ** verifying the operation of the SQLite core. | |
| 266 */ | |
| 267 int inTransaction; /* True after xBegin but before xCommit/xRollback */ | |
| 268 int mxSavepoint; /* Largest valid xSavepoint integer */ | |
| 269 #endif | |
| 270 | |
| 271 #ifdef SQLITE_TEST | |
| 272 /* True to disable the incremental doclist optimization. This is controled | |
| 273 ** by special insert command 'test-no-incr-doclist'. */ | |
| 274 int bNoIncrDoclist; | |
| 275 #endif | |
| 276 }; | |
| 277 | |
| 278 /* | |
| 279 ** When the core wants to read from the virtual table, it creates a | |
| 280 ** virtual table cursor (an instance of the following structure) using | |
| 281 ** the xOpen method. Cursors are destroyed using the xClose method. | |
| 282 */ | |
| 283 struct Fts3Cursor { | |
| 284 sqlite3_vtab_cursor base; /* Base class used by SQLite core */ | |
| 285 i16 eSearch; /* Search strategy (see below) */ | |
| 286 u8 isEof; /* True if at End Of Results */ | |
| 287 u8 isRequireSeek; /* True if must seek pStmt to %_content row */ | |
| 288 sqlite3_stmt *pStmt; /* Prepared statement in use by the cursor */ | |
| 289 Fts3Expr *pExpr; /* Parsed MATCH query string */ | |
| 290 int iLangid; /* Language being queried for */ | |
| 291 int nPhrase; /* Number of matchable phrases in query */ | |
| 292 Fts3DeferredToken *pDeferred; /* Deferred search tokens, if any */ | |
| 293 sqlite3_int64 iPrevId; /* Previous id read from aDoclist */ | |
| 294 char *pNextId; /* Pointer into the body of aDoclist */ | |
| 295 char *aDoclist; /* List of docids for full-text queries */ | |
| 296 int nDoclist; /* Size of buffer at aDoclist */ | |
| 297 u8 bDesc; /* True to sort in descending order */ | |
| 298 int eEvalmode; /* An FTS3_EVAL_XX constant */ | |
| 299 int nRowAvg; /* Average size of database rows, in pages */ | |
| 300 sqlite3_int64 nDoc; /* Documents in table */ | |
| 301 i64 iMinDocid; /* Minimum docid to return */ | |
| 302 i64 iMaxDocid; /* Maximum docid to return */ | |
| 303 int isMatchinfoNeeded; /* True when aMatchinfo[] needs filling in */ | |
| 304 u32 *aMatchinfo; /* Information about most recent match */ | |
| 305 int nMatchinfo; /* Number of elements in aMatchinfo[] */ | |
| 306 char *zMatchinfo; /* Matchinfo specification */ | |
| 307 }; | |
| 308 | |
| 309 #define FTS3_EVAL_FILTER 0 | |
| 310 #define FTS3_EVAL_NEXT 1 | |
| 311 #define FTS3_EVAL_MATCHINFO 2 | |
| 312 | |
| 313 /* | |
| 314 ** The Fts3Cursor.eSearch member is always set to one of the following. | |
| 315 ** Actualy, Fts3Cursor.eSearch can be greater than or equal to | |
| 316 ** FTS3_FULLTEXT_SEARCH. If so, then Fts3Cursor.eSearch - 2 is the index | |
| 317 ** of the column to be searched. For example, in | |
| 318 ** | |
| 319 ** CREATE VIRTUAL TABLE ex1 USING fts3(a,b,c,d); | |
| 320 ** SELECT docid FROM ex1 WHERE b MATCH 'one two three'; | |
| 321 ** | |
| 322 ** Because the LHS of the MATCH operator is 2nd column "b", | |
| 323 ** Fts3Cursor.eSearch will be set to FTS3_FULLTEXT_SEARCH+1. (+0 for a, | |
| 324 ** +1 for b, +2 for c, +3 for d.) If the LHS of MATCH were "ex1" | |
| 325 ** indicating that all columns should be searched, | |
| 326 ** then eSearch would be set to FTS3_FULLTEXT_SEARCH+4. | |
| 327 */ | |
| 328 #define FTS3_FULLSCAN_SEARCH 0 /* Linear scan of %_content table */ | |
| 329 #define FTS3_DOCID_SEARCH 1 /* Lookup by rowid on %_content table */ | |
| 330 #define FTS3_FULLTEXT_SEARCH 2 /* Full-text index search */ | |
| 331 | |
| 332 /* | |
| 333 ** The lower 16-bits of the sqlite3_index_info.idxNum value set by | |
| 334 ** the xBestIndex() method contains the Fts3Cursor.eSearch value described | |
| 335 ** above. The upper 16-bits contain a combination of the following | |
| 336 ** bits, used to describe extra constraints on full-text searches. | |
| 337 */ | |
| 338 #define FTS3_HAVE_LANGID 0x00010000 /* languageid=? */ | |
| 339 #define FTS3_HAVE_DOCID_GE 0x00020000 /* docid>=? */ | |
| 340 #define FTS3_HAVE_DOCID_LE 0x00040000 /* docid<=? */ | |
| 341 | |
| 342 struct Fts3Doclist { | |
| 343 char *aAll; /* Array containing doclist (or NULL) */ | |
| 344 int nAll; /* Size of a[] in bytes */ | |
| 345 char *pNextDocid; /* Pointer to next docid */ | |
| 346 | |
| 347 sqlite3_int64 iDocid; /* Current docid (if pList!=0) */ | |
| 348 int bFreeList; /* True if pList should be sqlite3_free()d */ | |
| 349 char *pList; /* Pointer to position list following iDocid */ | |
| 350 int nList; /* Length of position list */ | |
| 351 }; | |
| 352 | |
| 353 /* | |
| 354 ** A "phrase" is a sequence of one or more tokens that must match in | |
| 355 ** sequence. A single token is the base case and the most common case. | |
| 356 ** For a sequence of tokens contained in double-quotes (i.e. "one two three") | |
| 357 ** nToken will be the number of tokens in the string. | |
| 358 */ | |
| 359 struct Fts3PhraseToken { | |
| 360 char *z; /* Text of the token */ | |
| 361 int n; /* Number of bytes in buffer z */ | |
| 362 int isPrefix; /* True if token ends with a "*" character */ | |
| 363 int bFirst; /* True if token must appear at position 0 */ | |
| 364 | |
| 365 /* Variables above this point are populated when the expression is | |
| 366 ** parsed (by code in fts3_expr.c). Below this point the variables are | |
| 367 ** used when evaluating the expression. */ | |
| 368 Fts3DeferredToken *pDeferred; /* Deferred token object for this token */ | |
| 369 Fts3MultiSegReader *pSegcsr; /* Segment-reader for this token */ | |
| 370 }; | |
| 371 | |
| 372 struct Fts3Phrase { | |
| 373 /* Cache of doclist for this phrase. */ | |
| 374 Fts3Doclist doclist; | |
| 375 int bIncr; /* True if doclist is loaded incrementally */ | |
| 376 int iDoclistToken; | |
| 377 | |
| 378 /* Variables below this point are populated by fts3_expr.c when parsing | |
| 379 ** a MATCH expression. Everything above is part of the evaluation phase. | |
| 380 */ | |
| 381 int nToken; /* Number of tokens in the phrase */ | |
| 382 int iColumn; /* Index of column this phrase must match */ | |
| 383 Fts3PhraseToken aToken[1]; /* One entry for each token in the phrase */ | |
| 384 }; | |
| 385 | |
| 386 /* | |
| 387 ** A tree of these objects forms the RHS of a MATCH operator. | |
| 388 ** | |
| 389 ** If Fts3Expr.eType is FTSQUERY_PHRASE and isLoaded is true, then aDoclist | |
| 390 ** points to a malloced buffer, size nDoclist bytes, containing the results | |
| 391 ** of this phrase query in FTS3 doclist format. As usual, the initial | |
| 392 ** "Length" field found in doclists stored on disk is omitted from this | |
| 393 ** buffer. | |
| 394 ** | |
| 395 ** Variable aMI is used only for FTSQUERY_NEAR nodes to store the global | |
| 396 ** matchinfo data. If it is not NULL, it points to an array of size nCol*3, | |
| 397 ** where nCol is the number of columns in the queried FTS table. The array | |
| 398 ** is populated as follows: | |
| 399 ** | |
| 400 ** aMI[iCol*3 + 0] = Undefined | |
| 401 ** aMI[iCol*3 + 1] = Number of occurrences | |
| 402 ** aMI[iCol*3 + 2] = Number of rows containing at least one instance | |
| 403 ** | |
| 404 ** The aMI array is allocated using sqlite3_malloc(). It should be freed | |
| 405 ** when the expression node is. | |
| 406 */ | |
| 407 struct Fts3Expr { | |
| 408 int eType; /* One of the FTSQUERY_XXX values defined below */ | |
| 409 int nNear; /* Valid if eType==FTSQUERY_NEAR */ | |
| 410 Fts3Expr *pParent; /* pParent->pLeft==this or pParent->pRight==this */ | |
| 411 Fts3Expr *pLeft; /* Left operand */ | |
| 412 Fts3Expr *pRight; /* Right operand */ | |
| 413 Fts3Phrase *pPhrase; /* Valid if eType==FTSQUERY_PHRASE */ | |
| 414 | |
| 415 /* The following are used by the fts3_eval.c module. */ | |
| 416 sqlite3_int64 iDocid; /* Current docid */ | |
| 417 u8 bEof; /* True this expression is at EOF already */ | |
| 418 u8 bStart; /* True if iDocid is valid */ | |
| 419 u8 bDeferred; /* True if this expression is entirely deferred */ | |
| 420 | |
| 421 u32 *aMI; | |
| 422 }; | |
| 423 | |
| 424 /* | |
| 425 ** Candidate values for Fts3Query.eType. Note that the order of the first | |
| 426 ** four values is in order of precedence when parsing expressions. For | |
| 427 ** example, the following: | |
| 428 ** | |
| 429 ** "a OR b AND c NOT d NEAR e" | |
| 430 ** | |
| 431 ** is equivalent to: | |
| 432 ** | |
| 433 ** "a OR (b AND (c NOT (d NEAR e)))" | |
| 434 */ | |
| 435 #define FTSQUERY_NEAR 1 | |
| 436 #define FTSQUERY_NOT 2 | |
| 437 #define FTSQUERY_AND 3 | |
| 438 #define FTSQUERY_OR 4 | |
| 439 #define FTSQUERY_PHRASE 5 | |
| 440 | |
| 441 | |
| 442 /* fts3_write.c */ | |
| 443 int sqlite3Fts3UpdateMethod(sqlite3_vtab*,int,sqlite3_value**,sqlite3_int64*); | |
| 444 int sqlite3Fts3PendingTermsFlush(Fts3Table *); | |
| 445 void sqlite3Fts3PendingTermsClear(Fts3Table *); | |
| 446 int sqlite3Fts3Optimize(Fts3Table *); | |
| 447 int sqlite3Fts3SegReaderNew(int, int, sqlite3_int64, | |
| 448 sqlite3_int64, sqlite3_int64, const char *, int, Fts3SegReader**); | |
| 449 int sqlite3Fts3SegReaderPending( | |
| 450 Fts3Table*,int,const char*,int,int,Fts3SegReader**); | |
| 451 void sqlite3Fts3SegReaderFree(Fts3SegReader *); | |
| 452 int sqlite3Fts3AllSegdirs(Fts3Table*, int, int, int, sqlite3_stmt **); | |
| 453 int sqlite3Fts3ReadBlock(Fts3Table*, sqlite3_int64, char **, int*, int*); | |
| 454 | |
| 455 int sqlite3Fts3SelectDoctotal(Fts3Table *, sqlite3_stmt **); | |
| 456 int sqlite3Fts3SelectDocsize(Fts3Table *, sqlite3_int64, sqlite3_stmt **); | |
| 457 | |
| 458 #ifndef SQLITE_DISABLE_FTS4_DEFERRED | |
| 459 void sqlite3Fts3FreeDeferredTokens(Fts3Cursor *); | |
| 460 int sqlite3Fts3DeferToken(Fts3Cursor *, Fts3PhraseToken *, int); | |
| 461 int sqlite3Fts3CacheDeferredDoclists(Fts3Cursor *); | |
| 462 void sqlite3Fts3FreeDeferredDoclists(Fts3Cursor *); | |
| 463 int sqlite3Fts3DeferredTokenList(Fts3DeferredToken *, char **, int *); | |
| 464 #else | |
| 465 # define sqlite3Fts3FreeDeferredTokens(x) | |
| 466 # define sqlite3Fts3DeferToken(x,y,z) SQLITE_OK | |
| 467 # define sqlite3Fts3CacheDeferredDoclists(x) SQLITE_OK | |
| 468 # define sqlite3Fts3FreeDeferredDoclists(x) | |
| 469 # define sqlite3Fts3DeferredTokenList(x,y,z) SQLITE_OK | |
| 470 #endif | |
| 471 | |
| 472 void sqlite3Fts3SegmentsClose(Fts3Table *); | |
| 473 int sqlite3Fts3MaxLevel(Fts3Table *, int *); | |
| 474 | |
| 475 /* Special values interpreted by sqlite3SegReaderCursor() */ | |
| 476 #define FTS3_SEGCURSOR_PENDING -1 | |
| 477 #define FTS3_SEGCURSOR_ALL -2 | |
| 478 | |
| 479 int sqlite3Fts3SegReaderStart(Fts3Table*, Fts3MultiSegReader*, Fts3SegFilter*); | |
| 480 int sqlite3Fts3SegReaderStep(Fts3Table *, Fts3MultiSegReader *); | |
| 481 void sqlite3Fts3SegReaderFinish(Fts3MultiSegReader *); | |
| 482 | |
| 483 int sqlite3Fts3SegReaderCursor(Fts3Table *, | |
| 484 int, int, int, const char *, int, int, int, Fts3MultiSegReader *); | |
| 485 | |
| 486 /* Flags allowed as part of the 4th argument to SegmentReaderIterate() */ | |
| 487 #define FTS3_SEGMENT_REQUIRE_POS 0x00000001 | |
| 488 #define FTS3_SEGMENT_IGNORE_EMPTY 0x00000002 | |
| 489 #define FTS3_SEGMENT_COLUMN_FILTER 0x00000004 | |
| 490 #define FTS3_SEGMENT_PREFIX 0x00000008 | |
| 491 #define FTS3_SEGMENT_SCAN 0x00000010 | |
| 492 #define FTS3_SEGMENT_FIRST 0x00000020 | |
| 493 | |
| 494 /* Type passed as 4th argument to SegmentReaderIterate() */ | |
| 495 struct Fts3SegFilter { | |
| 496 const char *zTerm; | |
| 497 int nTerm; | |
| 498 int iCol; | |
| 499 int flags; | |
| 500 }; | |
| 501 | |
| 502 struct Fts3MultiSegReader { | |
| 503 /* Used internally by sqlite3Fts3SegReaderXXX() calls */ | |
| 504 Fts3SegReader **apSegment; /* Array of Fts3SegReader objects */ | |
| 505 int nSegment; /* Size of apSegment array */ | |
| 506 int nAdvance; /* How many seg-readers to advance */ | |
| 507 Fts3SegFilter *pFilter; /* Pointer to filter object */ | |
| 508 char *aBuffer; /* Buffer to merge doclists in */ | |
| 509 int nBuffer; /* Allocated size of aBuffer[] in bytes */ | |
| 510 | |
| 511 int iColFilter; /* If >=0, filter for this column */ | |
| 512 int bRestart; | |
| 513 | |
| 514 /* Used by fts3.c only. */ | |
| 515 int nCost; /* Cost of running iterator */ | |
| 516 int bLookup; /* True if a lookup of a single entry. */ | |
| 517 | |
| 518 /* Output values. Valid only after Fts3SegReaderStep() returns SQLITE_ROW. */ | |
| 519 char *zTerm; /* Pointer to term buffer */ | |
| 520 int nTerm; /* Size of zTerm in bytes */ | |
| 521 char *aDoclist; /* Pointer to doclist buffer */ | |
| 522 int nDoclist; /* Size of aDoclist[] in bytes */ | |
| 523 }; | |
| 524 | |
| 525 int sqlite3Fts3Incrmerge(Fts3Table*,int,int); | |
| 526 | |
| 527 #define fts3GetVarint32(p, piVal) ( \ | |
| 528 (*(u8*)(p)&0x80) ? sqlite3Fts3GetVarint32(p, piVal) : (*piVal=*(u8*)(p), 1) \ | |
| 529 ) | |
| 530 | |
| 531 /* fts3.c */ | |
| 532 int sqlite3Fts3PutVarint(char *, sqlite3_int64); | |
| 533 int sqlite3Fts3GetVarint(const char *, sqlite_int64 *); | |
| 534 int sqlite3Fts3GetVarint32(const char *, int *); | |
| 535 int sqlite3Fts3VarintLen(sqlite3_uint64); | |
| 536 void sqlite3Fts3Dequote(char *); | |
| 537 void sqlite3Fts3DoclistPrev(int,char*,int,char**,sqlite3_int64*,int*,u8*); | |
| 538 int sqlite3Fts3EvalPhraseStats(Fts3Cursor *, Fts3Expr *, u32 *); | |
| 539 int sqlite3Fts3FirstFilter(sqlite3_int64, char *, int, char *); | |
| 540 void sqlite3Fts3CreateStatTable(int*, Fts3Table*); | |
| 541 | |
| 542 /* fts3_tokenizer.c */ | |
| 543 const char *sqlite3Fts3NextToken(const char *, int *); | |
| 544 int sqlite3Fts3InitHashTable(sqlite3 *, Fts3Hash *, const char *); | |
| 545 int sqlite3Fts3InitTokenizer(Fts3Hash *pHash, const char *, | |
| 546 sqlite3_tokenizer **, char ** | |
| 547 ); | |
| 548 int sqlite3Fts3IsIdChar(char); | |
| 549 | |
| 550 /* fts3_snippet.c */ | |
| 551 void sqlite3Fts3Offsets(sqlite3_context*, Fts3Cursor*); | |
| 552 void sqlite3Fts3Snippet(sqlite3_context *, Fts3Cursor *, const char *, | |
| 553 const char *, const char *, int, int | |
| 554 ); | |
| 555 void sqlite3Fts3Matchinfo(sqlite3_context *, Fts3Cursor *, const char *); | |
| 556 | |
| 557 /* fts3_expr.c */ | |
| 558 int sqlite3Fts3ExprParse(sqlite3_tokenizer *, int, | |
| 559 char **, int, int, int, const char *, int, Fts3Expr **, char ** | |
| 560 ); | |
| 561 void sqlite3Fts3ExprFree(Fts3Expr *); | |
| 562 #ifdef SQLITE_TEST | |
| 563 int sqlite3Fts3ExprInitTestInterface(sqlite3 *db); | |
| 564 int sqlite3Fts3InitTerm(sqlite3 *db); | |
| 565 #endif | |
| 566 | |
| 567 int sqlite3Fts3OpenTokenizer(sqlite3_tokenizer *, int, const char *, int, | |
| 568 sqlite3_tokenizer_cursor ** | |
| 569 ); | |
| 570 | |
| 571 /* fts3_aux.c */ | |
| 572 int sqlite3Fts3InitAux(sqlite3 *db); | |
| 573 | |
| 574 void sqlite3Fts3EvalPhraseCleanup(Fts3Phrase *); | |
| 575 | |
| 576 int sqlite3Fts3MsrIncrStart( | |
| 577 Fts3Table*, Fts3MultiSegReader*, int, const char*, int); | |
| 578 int sqlite3Fts3MsrIncrNext( | |
| 579 Fts3Table *, Fts3MultiSegReader *, sqlite3_int64 *, char **, int *); | |
| 580 int sqlite3Fts3EvalPhrasePoslist(Fts3Cursor *, Fts3Expr *, int iCol, char **); | |
| 581 int sqlite3Fts3MsrOvfl(Fts3Cursor *, Fts3MultiSegReader *, int *); | |
| 582 int sqlite3Fts3MsrIncrRestart(Fts3MultiSegReader *pCsr); | |
| 583 | |
| 584 /* fts3_tokenize_vtab.c */ | |
| 585 int sqlite3Fts3InitTok(sqlite3*, Fts3Hash *); | |
| 586 | |
| 587 /* fts3_unicode2.c (functions generated by parsing unicode text files) */ | |
| 588 #ifndef SQLITE_DISABLE_FTS3_UNICODE | |
| 589 int sqlite3FtsUnicodeFold(int, int); | |
| 590 int sqlite3FtsUnicodeIsalnum(int); | |
| 591 int sqlite3FtsUnicodeIsdiacritic(int); | |
| 592 #endif | |
| 593 | |
| 594 #endif /* !SQLITE_CORE || SQLITE_ENABLE_FTS3 */ | |
| 595 #endif /* _FTSINT_H */ | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2363173002:
[sqlite] Remove obsolete reference version 3.8.7.4. (Closed)
