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Unified Diff: third_party/sqlite/sqlite-src-3100200/ext/fts5/fts5_vocab.c

Issue 2846743003: [sql] Remove SQLite 3.10.2 reference directory. (Closed)
Patch Set: Created 3 years, 8 months ago
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Index: third_party/sqlite/sqlite-src-3100200/ext/fts5/fts5_vocab.c
diff --git a/third_party/sqlite/sqlite-src-3100200/ext/fts5/fts5_vocab.c b/third_party/sqlite/sqlite-src-3100200/ext/fts5/fts5_vocab.c
deleted file mode 100644
index 860cfedb9bc4b6a0ff4c069e9a6f50cec2a73415..0000000000000000000000000000000000000000
--- a/third_party/sqlite/sqlite-src-3100200/ext/fts5/fts5_vocab.c
+++ /dev/null
@@ -1,600 +0,0 @@
-/*
-** 2015 May 08
-**
-** The author disclaims copyright to this source code. In place of
-** a legal notice, here is a blessing:
-**
-** May you do good and not evil.
-** May you find forgiveness for yourself and forgive others.
-** May you share freely, never taking more than you give.
-**
-******************************************************************************
-**
-** This is an SQLite virtual table module implementing direct access to an
-** existing FTS5 index. The module may create several different types of
-** tables:
-**
-** col:
-** CREATE TABLE vocab(term, col, doc, cnt, PRIMARY KEY(term, col));
-**
-** One row for each term/column combination. The value of $doc is set to
-** the number of fts5 rows that contain at least one instance of term
-** $term within column $col. Field $cnt is set to the total number of
-** instances of term $term in column $col (in any row of the fts5 table).
-**
-** row:
-** CREATE TABLE vocab(term, doc, cnt, PRIMARY KEY(term));
-**
-** One row for each term in the database. The value of $doc is set to
-** the number of fts5 rows that contain at least one instance of term
-** $term. Field $cnt is set to the total number of instances of term
-** $term in the database.
-*/
-
-
-#include "fts5Int.h"
-
-
-typedef struct Fts5VocabTable Fts5VocabTable;
-typedef struct Fts5VocabCursor Fts5VocabCursor;
-
-struct Fts5VocabTable {
- sqlite3_vtab base;
- char *zFts5Tbl; /* Name of fts5 table */
- char *zFts5Db; /* Db containing fts5 table */
- sqlite3 *db; /* Database handle */
- Fts5Global *pGlobal; /* FTS5 global object for this database */
- int eType; /* FTS5_VOCAB_COL or ROW */
-};
-
-struct Fts5VocabCursor {
- sqlite3_vtab_cursor base;
- sqlite3_stmt *pStmt; /* Statement holding lock on pIndex */
- Fts5Index *pIndex; /* Associated FTS5 index */
-
- int bEof; /* True if this cursor is at EOF */
- Fts5IndexIter *pIter; /* Term/rowid iterator object */
-
- int nLeTerm; /* Size of zLeTerm in bytes */
- char *zLeTerm; /* (term <= $zLeTerm) paramater, or NULL */
-
- /* These are used by 'col' tables only */
- Fts5Config *pConfig; /* Fts5 table configuration */
- int iCol;
- i64 *aCnt;
- i64 *aDoc;
-
- /* Output values used by 'row' and 'col' tables */
- i64 rowid; /* This table's current rowid value */
- Fts5Buffer term; /* Current value of 'term' column */
-};
-
-#define FTS5_VOCAB_COL 0
-#define FTS5_VOCAB_ROW 1
-
-#define FTS5_VOCAB_COL_SCHEMA "term, col, doc, cnt"
-#define FTS5_VOCAB_ROW_SCHEMA "term, doc, cnt"
-
-/*
-** Bits for the mask used as the idxNum value by xBestIndex/xFilter.
-*/
-#define FTS5_VOCAB_TERM_EQ 0x01
-#define FTS5_VOCAB_TERM_GE 0x02
-#define FTS5_VOCAB_TERM_LE 0x04
-
-
-/*
-** Translate a string containing an fts5vocab table type to an
-** FTS5_VOCAB_XXX constant. If successful, set *peType to the output
-** value and return SQLITE_OK. Otherwise, set *pzErr to an error message
-** and return SQLITE_ERROR.
-*/
-static int fts5VocabTableType(const char *zType, char **pzErr, int *peType){
- int rc = SQLITE_OK;
- char *zCopy = sqlite3Fts5Strndup(&rc, zType, -1);
- if( rc==SQLITE_OK ){
- sqlite3Fts5Dequote(zCopy);
- if( sqlite3_stricmp(zCopy, "col")==0 ){
- *peType = FTS5_VOCAB_COL;
- }else
-
- if( sqlite3_stricmp(zCopy, "row")==0 ){
- *peType = FTS5_VOCAB_ROW;
- }else
- {
- *pzErr = sqlite3_mprintf("fts5vocab: unknown table type: %Q", zCopy);
- rc = SQLITE_ERROR;
- }
- sqlite3_free(zCopy);
- }
-
- return rc;
-}
-
-
-/*
-** The xDisconnect() virtual table method.
-*/
-static int fts5VocabDisconnectMethod(sqlite3_vtab *pVtab){
- Fts5VocabTable *pTab = (Fts5VocabTable*)pVtab;
- sqlite3_free(pTab);
- return SQLITE_OK;
-}
-
-/*
-** The xDestroy() virtual table method.
-*/
-static int fts5VocabDestroyMethod(sqlite3_vtab *pVtab){
- Fts5VocabTable *pTab = (Fts5VocabTable*)pVtab;
- sqlite3_free(pTab);
- return SQLITE_OK;
-}
-
-/*
-** This function is the implementation of both the xConnect and xCreate
-** methods of the FTS3 virtual table.
-**
-** The argv[] array contains the following:
-**
-** argv[0] -> module name ("fts5vocab")
-** argv[1] -> database name
-** argv[2] -> table name
-**
-** then:
-**
-** argv[3] -> name of fts5 table
-** argv[4] -> type of fts5vocab table
-**
-** or, for tables in the TEMP schema only.
-**
-** argv[3] -> name of fts5 tables database
-** argv[4] -> name of fts5 table
-** argv[5] -> type of fts5vocab table
-*/
-static int fts5VocabInitVtab(
- sqlite3 *db, /* The SQLite database connection */
- void *pAux, /* Pointer to Fts5Global object */
- int argc, /* Number of elements in argv array */
- const char * const *argv, /* xCreate/xConnect argument array */
- sqlite3_vtab **ppVTab, /* Write the resulting vtab structure here */
- char **pzErr /* Write any error message here */
-){
- const char *azSchema[] = {
- "CREATE TABlE vocab(" FTS5_VOCAB_COL_SCHEMA ")",
- "CREATE TABlE vocab(" FTS5_VOCAB_ROW_SCHEMA ")"
- };
-
- Fts5VocabTable *pRet = 0;
- int rc = SQLITE_OK; /* Return code */
- int bDb;
-
- bDb = (argc==6 && strlen(argv[1])==4 && memcmp("temp", argv[1], 4)==0);
-
- if( argc!=5 && bDb==0 ){
- *pzErr = sqlite3_mprintf("wrong number of vtable arguments");
- rc = SQLITE_ERROR;
- }else{
- int nByte; /* Bytes of space to allocate */
- const char *zDb = bDb ? argv[3] : argv[1];
- const char *zTab = bDb ? argv[4] : argv[3];
- const char *zType = bDb ? argv[5] : argv[4];
- int nDb = (int)strlen(zDb)+1;
- int nTab = (int)strlen(zTab)+1;
- int eType = 0;
-
- rc = fts5VocabTableType(zType, pzErr, &eType);
- if( rc==SQLITE_OK ){
- assert( eType>=0 && eType<sizeof(azSchema)/sizeof(azSchema[0]) );
- rc = sqlite3_declare_vtab(db, azSchema[eType]);
- }
-
- nByte = sizeof(Fts5VocabTable) + nDb + nTab;
- pRet = sqlite3Fts5MallocZero(&rc, nByte);
- if( pRet ){
- pRet->pGlobal = (Fts5Global*)pAux;
- pRet->eType = eType;
- pRet->db = db;
- pRet->zFts5Tbl = (char*)&pRet[1];
- pRet->zFts5Db = &pRet->zFts5Tbl[nTab];
- memcpy(pRet->zFts5Tbl, zTab, nTab);
- memcpy(pRet->zFts5Db, zDb, nDb);
- sqlite3Fts5Dequote(pRet->zFts5Tbl);
- sqlite3Fts5Dequote(pRet->zFts5Db);
- }
- }
-
- *ppVTab = (sqlite3_vtab*)pRet;
- return rc;
-}
-
-
-/*
-** The xConnect() and xCreate() methods for the virtual table. All the
-** work is done in function fts5VocabInitVtab().
-*/
-static int fts5VocabConnectMethod(
- sqlite3 *db, /* Database connection */
- void *pAux, /* Pointer to tokenizer hash table */
- int argc, /* Number of elements in argv array */
- const char * const *argv, /* xCreate/xConnect argument array */
- sqlite3_vtab **ppVtab, /* OUT: New sqlite3_vtab object */
- char **pzErr /* OUT: sqlite3_malloc'd error message */
-){
- return fts5VocabInitVtab(db, pAux, argc, argv, ppVtab, pzErr);
-}
-static int fts5VocabCreateMethod(
- sqlite3 *db, /* Database connection */
- void *pAux, /* Pointer to tokenizer hash table */
- int argc, /* Number of elements in argv array */
- const char * const *argv, /* xCreate/xConnect argument array */
- sqlite3_vtab **ppVtab, /* OUT: New sqlite3_vtab object */
- char **pzErr /* OUT: sqlite3_malloc'd error message */
-){
- return fts5VocabInitVtab(db, pAux, argc, argv, ppVtab, pzErr);
-}
-
-/*
-** Implementation of the xBestIndex method.
-*/
-static int fts5VocabBestIndexMethod(
- sqlite3_vtab *pVTab,
- sqlite3_index_info *pInfo
-){
- int i;
- int iTermEq = -1;
- int iTermGe = -1;
- int iTermLe = -1;
- int idxNum = 0;
- int nArg = 0;
-
- for(i=0; i<pInfo->nConstraint; i++){
- struct sqlite3_index_constraint *p = &pInfo->aConstraint[i];
- if( p->usable==0 ) continue;
- if( p->iColumn==0 ){ /* term column */
- if( p->op==SQLITE_INDEX_CONSTRAINT_EQ ) iTermEq = i;
- if( p->op==SQLITE_INDEX_CONSTRAINT_LE ) iTermLe = i;
- if( p->op==SQLITE_INDEX_CONSTRAINT_LT ) iTermLe = i;
- if( p->op==SQLITE_INDEX_CONSTRAINT_GE ) iTermGe = i;
- if( p->op==SQLITE_INDEX_CONSTRAINT_GT ) iTermGe = i;
- }
- }
-
- if( iTermEq>=0 ){
- idxNum |= FTS5_VOCAB_TERM_EQ;
- pInfo->aConstraintUsage[iTermEq].argvIndex = ++nArg;
- pInfo->estimatedCost = 100;
- }else{
- pInfo->estimatedCost = 1000000;
- if( iTermGe>=0 ){
- idxNum |= FTS5_VOCAB_TERM_GE;
- pInfo->aConstraintUsage[iTermGe].argvIndex = ++nArg;
- pInfo->estimatedCost = pInfo->estimatedCost / 2;
- }
- if( iTermLe>=0 ){
- idxNum |= FTS5_VOCAB_TERM_LE;
- pInfo->aConstraintUsage[iTermLe].argvIndex = ++nArg;
- pInfo->estimatedCost = pInfo->estimatedCost / 2;
- }
- }
-
- pInfo->idxNum = idxNum;
-
- return SQLITE_OK;
-}
-
-/*
-** Implementation of xOpen method.
-*/
-static int fts5VocabOpenMethod(
- sqlite3_vtab *pVTab,
- sqlite3_vtab_cursor **ppCsr
-){
- Fts5VocabTable *pTab = (Fts5VocabTable*)pVTab;
- Fts5Index *pIndex = 0;
- Fts5Config *pConfig = 0;
- Fts5VocabCursor *pCsr = 0;
- int rc = SQLITE_OK;
- sqlite3_stmt *pStmt = 0;
- char *zSql = 0;
-
- zSql = sqlite3Fts5Mprintf(&rc,
- "SELECT t.%Q FROM %Q.%Q AS t WHERE t.%Q MATCH '*id'",
- pTab->zFts5Tbl, pTab->zFts5Db, pTab->zFts5Tbl, pTab->zFts5Tbl
- );
- if( zSql ){
- rc = sqlite3_prepare_v2(pTab->db, zSql, -1, &pStmt, 0);
- }
- sqlite3_free(zSql);
- assert( rc==SQLITE_OK || pStmt==0 );
- if( rc==SQLITE_ERROR ) rc = SQLITE_OK;
-
- if( pStmt && sqlite3_step(pStmt)==SQLITE_ROW ){
- i64 iId = sqlite3_column_int64(pStmt, 0);
- pIndex = sqlite3Fts5IndexFromCsrid(pTab->pGlobal, iId, &pConfig);
- }
-
- if( rc==SQLITE_OK && pIndex==0 ){
- rc = sqlite3_finalize(pStmt);
- pStmt = 0;
- if( rc==SQLITE_OK ){
- pVTab->zErrMsg = sqlite3_mprintf(
- "no such fts5 table: %s.%s", pTab->zFts5Db, pTab->zFts5Tbl
- );
- rc = SQLITE_ERROR;
- }
- }
-
- if( rc==SQLITE_OK ){
- int nByte = pConfig->nCol * sizeof(i64) * 2 + sizeof(Fts5VocabCursor);
- pCsr = (Fts5VocabCursor*)sqlite3Fts5MallocZero(&rc, nByte);
- }
-
- if( pCsr ){
- pCsr->pIndex = pIndex;
- pCsr->pStmt = pStmt;
- pCsr->pConfig = pConfig;
- pCsr->aCnt = (i64*)&pCsr[1];
- pCsr->aDoc = &pCsr->aCnt[pConfig->nCol];
- }else{
- sqlite3_finalize(pStmt);
- }
-
- *ppCsr = (sqlite3_vtab_cursor*)pCsr;
- return rc;
-}
-
-static void fts5VocabResetCursor(Fts5VocabCursor *pCsr){
- pCsr->rowid = 0;
- sqlite3Fts5IterClose(pCsr->pIter);
- pCsr->pIter = 0;
- sqlite3_free(pCsr->zLeTerm);
- pCsr->nLeTerm = -1;
- pCsr->zLeTerm = 0;
-}
-
-/*
-** Close the cursor. For additional information see the documentation
-** on the xClose method of the virtual table interface.
-*/
-static int fts5VocabCloseMethod(sqlite3_vtab_cursor *pCursor){
- Fts5VocabCursor *pCsr = (Fts5VocabCursor*)pCursor;
- fts5VocabResetCursor(pCsr);
- sqlite3Fts5BufferFree(&pCsr->term);
- sqlite3_finalize(pCsr->pStmt);
- sqlite3_free(pCsr);
- return SQLITE_OK;
-}
-
-
-/*
-** Advance the cursor to the next row in the table.
-*/
-static int fts5VocabNextMethod(sqlite3_vtab_cursor *pCursor){
- Fts5VocabCursor *pCsr = (Fts5VocabCursor*)pCursor;
- Fts5VocabTable *pTab = (Fts5VocabTable*)pCursor->pVtab;
- int rc = SQLITE_OK;
- int nCol = pCsr->pConfig->nCol;
-
- pCsr->rowid++;
-
- if( pTab->eType==FTS5_VOCAB_COL ){
- for(pCsr->iCol++; pCsr->iCol<nCol; pCsr->iCol++){
- if( pCsr->aCnt[pCsr->iCol] ) break;
- }
- }
-
- if( pTab->eType==FTS5_VOCAB_ROW || pCsr->iCol>=nCol ){
- if( sqlite3Fts5IterEof(pCsr->pIter) ){
- pCsr->bEof = 1;
- }else{
- const char *zTerm;
- int nTerm;
-
- zTerm = sqlite3Fts5IterTerm(pCsr->pIter, &nTerm);
- if( pCsr->nLeTerm>=0 ){
- int nCmp = MIN(nTerm, pCsr->nLeTerm);
- int bCmp = memcmp(pCsr->zLeTerm, zTerm, nCmp);
- if( bCmp<0 || (bCmp==0 && pCsr->nLeTerm<nTerm) ){
- pCsr->bEof = 1;
- return SQLITE_OK;
- }
- }
-
- sqlite3Fts5BufferSet(&rc, &pCsr->term, nTerm, (const u8*)zTerm);
- memset(pCsr->aCnt, 0, nCol * sizeof(i64));
- memset(pCsr->aDoc, 0, nCol * sizeof(i64));
- pCsr->iCol = 0;
-
- assert( pTab->eType==FTS5_VOCAB_COL || pTab->eType==FTS5_VOCAB_ROW );
- while( rc==SQLITE_OK ){
- i64 dummy;
- const u8 *pPos; int nPos; /* Position list */
- i64 iPos = 0; /* 64-bit position read from poslist */
- int iOff = 0; /* Current offset within position list */
-
- rc = sqlite3Fts5IterPoslist(pCsr->pIter, 0, &pPos, &nPos, &dummy);
- if( rc==SQLITE_OK ){
- if( pTab->eType==FTS5_VOCAB_ROW ){
- while( 0==sqlite3Fts5PoslistNext64(pPos, nPos, &iOff, &iPos) ){
- pCsr->aCnt[0]++;
- }
- pCsr->aDoc[0]++;
- }else{
- int iCol = -1;
- while( 0==sqlite3Fts5PoslistNext64(pPos, nPos, &iOff, &iPos) ){
- int ii = FTS5_POS2COLUMN(iPos);
- pCsr->aCnt[ii]++;
- if( iCol!=ii ){
- pCsr->aDoc[ii]++;
- iCol = ii;
- }
- }
- }
- rc = sqlite3Fts5IterNextScan(pCsr->pIter);
- }
-
- if( rc==SQLITE_OK ){
- zTerm = sqlite3Fts5IterTerm(pCsr->pIter, &nTerm);
- if( nTerm!=pCsr->term.n || memcmp(zTerm, pCsr->term.p, nTerm) ){
- break;
- }
- if( sqlite3Fts5IterEof(pCsr->pIter) ) break;
- }
- }
- }
- }
-
- if( pCsr->bEof==0 && pTab->eType==FTS5_VOCAB_COL ){
- while( pCsr->aCnt[pCsr->iCol]==0 ) pCsr->iCol++;
- assert( pCsr->iCol<pCsr->pConfig->nCol );
- }
- return rc;
-}
-
-/*
-** This is the xFilter implementation for the virtual table.
-*/
-static int fts5VocabFilterMethod(
- sqlite3_vtab_cursor *pCursor, /* The cursor used for this query */
- int idxNum, /* Strategy index */
- const char *idxStr, /* Unused */
- int nVal, /* Number of elements in apVal */
- sqlite3_value **apVal /* Arguments for the indexing scheme */
-){
- Fts5VocabCursor *pCsr = (Fts5VocabCursor*)pCursor;
- int rc = SQLITE_OK;
-
- int iVal = 0;
- int f = FTS5INDEX_QUERY_SCAN;
- const char *zTerm = 0;
- int nTerm = 0;
-
- sqlite3_value *pEq = 0;
- sqlite3_value *pGe = 0;
- sqlite3_value *pLe = 0;
-
- fts5VocabResetCursor(pCsr);
- if( idxNum & FTS5_VOCAB_TERM_EQ ) pEq = apVal[iVal++];
- if( idxNum & FTS5_VOCAB_TERM_GE ) pGe = apVal[iVal++];
- if( idxNum & FTS5_VOCAB_TERM_LE ) pLe = apVal[iVal++];
-
- if( pEq ){
- zTerm = (const char *)sqlite3_value_text(pEq);
- nTerm = sqlite3_value_bytes(pEq);
- f = 0;
- }else{
- if( pGe ){
- zTerm = (const char *)sqlite3_value_text(pGe);
- nTerm = sqlite3_value_bytes(pGe);
- }
- if( pLe ){
- const char *zCopy = (const char *)sqlite3_value_text(pLe);
- pCsr->nLeTerm = sqlite3_value_bytes(pLe);
- pCsr->zLeTerm = sqlite3_malloc(pCsr->nLeTerm+1);
- if( pCsr->zLeTerm==0 ){
- rc = SQLITE_NOMEM;
- }else{
- memcpy(pCsr->zLeTerm, zCopy, pCsr->nLeTerm+1);
- }
- }
- }
-
-
- if( rc==SQLITE_OK ){
- rc = sqlite3Fts5IndexQuery(pCsr->pIndex, zTerm, nTerm, f, 0, &pCsr->pIter);
- }
- if( rc==SQLITE_OK ){
- rc = fts5VocabNextMethod(pCursor);
- }
-
- return rc;
-}
-
-/*
-** This is the xEof method of the virtual table. SQLite calls this
-** routine to find out if it has reached the end of a result set.
-*/
-static int fts5VocabEofMethod(sqlite3_vtab_cursor *pCursor){
- Fts5VocabCursor *pCsr = (Fts5VocabCursor*)pCursor;
- return pCsr->bEof;
-}
-
-static int fts5VocabColumnMethod(
- sqlite3_vtab_cursor *pCursor, /* Cursor to retrieve value from */
- sqlite3_context *pCtx, /* Context for sqlite3_result_xxx() calls */
- int iCol /* Index of column to read value from */
-){
- Fts5VocabCursor *pCsr = (Fts5VocabCursor*)pCursor;
-
- if( iCol==0 ){
- sqlite3_result_text(
- pCtx, (const char*)pCsr->term.p, pCsr->term.n, SQLITE_TRANSIENT
- );
- }
- else if( ((Fts5VocabTable*)(pCursor->pVtab))->eType==FTS5_VOCAB_COL ){
- assert( iCol==1 || iCol==2 || iCol==3 );
- if( iCol==1 ){
- const char *z = pCsr->pConfig->azCol[pCsr->iCol];
- sqlite3_result_text(pCtx, z, -1, SQLITE_STATIC);
- }else if( iCol==2 ){
- sqlite3_result_int64(pCtx, pCsr->aDoc[pCsr->iCol]);
- }else{
- sqlite3_result_int64(pCtx, pCsr->aCnt[pCsr->iCol]);
- }
- }else{
- assert( iCol==1 || iCol==2 );
- if( iCol==1 ){
- sqlite3_result_int64(pCtx, pCsr->aDoc[0]);
- }else{
- sqlite3_result_int64(pCtx, pCsr->aCnt[0]);
- }
- }
- return SQLITE_OK;
-}
-
-/*
-** This is the xRowid method. The SQLite core calls this routine to
-** retrieve the rowid for the current row of the result set. The
-** rowid should be written to *pRowid.
-*/
-static int fts5VocabRowidMethod(
- sqlite3_vtab_cursor *pCursor,
- sqlite_int64 *pRowid
-){
- Fts5VocabCursor *pCsr = (Fts5VocabCursor*)pCursor;
- *pRowid = pCsr->rowid;
- return SQLITE_OK;
-}
-
-int sqlite3Fts5VocabInit(Fts5Global *pGlobal, sqlite3 *db){
- static const sqlite3_module fts5Vocab = {
- /* iVersion */ 2,
- /* xCreate */ fts5VocabCreateMethod,
- /* xConnect */ fts5VocabConnectMethod,
- /* xBestIndex */ fts5VocabBestIndexMethod,
- /* xDisconnect */ fts5VocabDisconnectMethod,
- /* xDestroy */ fts5VocabDestroyMethod,
- /* xOpen */ fts5VocabOpenMethod,
- /* xClose */ fts5VocabCloseMethod,
- /* xFilter */ fts5VocabFilterMethod,
- /* xNext */ fts5VocabNextMethod,
- /* xEof */ fts5VocabEofMethod,
- /* xColumn */ fts5VocabColumnMethod,
- /* xRowid */ fts5VocabRowidMethod,
- /* xUpdate */ 0,
- /* xBegin */ 0,
- /* xSync */ 0,
- /* xCommit */ 0,
- /* xRollback */ 0,
- /* xFindFunction */ 0,
- /* xRename */ 0,
- /* xSavepoint */ 0,
- /* xRelease */ 0,
- /* xRollbackTo */ 0,
- };
- void *p = (void*)pGlobal;
-
- return sqlite3_create_module_v2(db, "fts5vocab", &fts5Vocab, p, 0);
-}
-
-

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