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1/*
2** 2001 September 15
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** Internal interface definitions for SQLite.
13**
14** @(#) $Id: sqliteInt.h,v 1.2 2003/11/13 15:49:58 graydon Exp $
15*/
16#include "config.h"
17#include "sqlite.h"
18#include "hash.h"
19#include "vdbe.h"
20#include "parse.h"
21#include "btree.h"
22#include <stdio.h>
23#include <stdlib.h>
24#include <string.h>
25#include <assert.h>
26
27/*
28** The maximum number of in-memory pages to use for the main database
29** table and for temporary tables.
30*/
31#define MAX_PAGES 2000
32#define TEMP_PAGES 500
33
34/*
35** If the following macro is set to 1, then NULL values are considered
36** distinct for the SELECT DISTINCT statement and for UNION or EXCEPT
37** compound queries. No other SQL database engine (among those tested)
38** works this way except for OCELOT. But the SQL92 spec implies that
39** this is how things should work.
40**
41** If the following macro is set to 0, then NULLs are indistinct for
42** SELECT DISTINCT and for UNION.
43*/
44#define NULL_ALWAYS_DISTINCT 0
45
46/*
47** If the following macro is set to 1, then NULL values are considered
48** distinct when determining whether or not two entries are the same
49** in a UNIQUE index. This is the way PostgreSQL, Oracle, DB2, MySQL,
50** OCELOT, and Firebird all work. The SQL92 spec explicitly says this
51** is the way things are suppose to work.
52**
53** If the following macro is set to 0, the NULLs are indistinct for
54** a UNIQUE index. In this mode, you can only have a single NULL entry
55** for a column declared UNIQUE. This is the way Informix and SQL Server
56** work.
57*/
58#define NULL_DISTINCT_FOR_UNIQUE 1
59
60/*
61** The maximum number of attached databases. This must be at least 2
62** in order to support the main database file (0) and the file used to
63** hold temporary tables (1). And it must be less than 256 because
64** an unsigned character is used to stored the database index.
65*/
66#define MAX_ATTACHED 10
67
68/*
69** The next macro is used to determine where TEMP tables and indices
70** are stored. Possible values:
71**
72** 0 Always use a temporary files
73** 1 Use a file unless overridden by "PRAGMA temp_store"
74** 2 Use memory unless overridden by "PRAGMA temp_store"
75** 3 Always use memory
76*/
77#ifndef TEMP_STORE
78# define TEMP_STORE 1
79#endif
80
81/*
82** When building SQLite for embedded systems where memory is scarce,
83** you can define one or more of the following macros to omit extra
84** features of the library and thus keep the size of the library to
85** a minimum.
86*/
87/* #define SQLITE_OMIT_AUTHORIZATION 1 */
88/* #define SQLITE_OMIT_INMEMORYDB 1 */
89/* #define SQLITE_OMIT_VACUUM 1 */
90
91/*
92** Integers of known sizes. These typedefs might change for architectures
93** where the sizes very. Preprocessor macros are available so that the
94** types can be conveniently redefined at compile-type. Like this:
95**
96** cc '-DUINTPTR_TYPE=long long int' ...
97*/
98#ifndef UINT32_TYPE
99# define UINT32_TYPE unsigned int
100#endif
101#ifndef UINT16_TYPE
102# define UINT16_TYPE unsigned short int
103#endif
104#ifndef UINT8_TYPE
105# define UINT8_TYPE unsigned char
106#endif
107#ifndef INTPTR_TYPE
108# if SQLITE_PTR_SZ==4
109# define INTPTR_TYPE int
110# else
111# define INTPTR_TYPE long long
112# endif
113#endif
114typedef UINT32_TYPE u32; /* 4-byte unsigned integer */
115typedef UINT16_TYPE u16; /* 2-byte unsigned integer */
116typedef UINT8_TYPE u8; /* 1-byte unsigned integer */
117typedef INTPTR_TYPE ptr; /* Big enough to hold a pointer */
118typedef unsigned INTPTR_TYPE uptr; /* Big enough to hold a pointer */
119
120/*
121** This macro casts a pointer to an integer. Useful for doing
122** pointer arithmetic.
123*/
124#define Addr(X) ((uptr)X)
125
126/*
127** The maximum number of bytes of data that can be put into a single
128** row of a single table. The upper bound on this limit is 16777215
129** bytes (or 16MB-1). We have arbitrarily set the limit to just 1MB
130** here because the overflow page chain is inefficient for really big
131** records and we want to discourage people from thinking that
132** multi-megabyte records are OK. If your needs are different, you can
133** change this define and recompile to increase or decrease the record
134** size.
135**
136** The 16777198 is computed as follows: 238 bytes of payload on the
137** original pages plus 16448 overflow pages each holding 1020 bytes of
138** data.
139*/
140/* #define MAX_BYTES_PER_ROW 1048576 */
141
142#define MAX_BYTES_PER_ROW 16777198
143
144/*
145** If memory allocation problems are found, recompile with
146**
147** -DMEMORY_DEBUG=1
148**
149** to enable some sanity checking on malloc() and free(). To
150** check for memory leaks, recompile with
151**
152** -DMEMORY_DEBUG=2
153**
154** and a line of text will be written to standard error for
155** each malloc() and free(). This output can be analyzed
156** by an AWK script to determine if there are any leaks.
157*/
158#ifdef MEMORY_DEBUG
159# define sqliteMalloc(X) sqliteMalloc_(X,1,__FILE__,__LINE__)
160# define sqliteMallocRaw(X) sqliteMalloc_(X,0,__FILE__,__LINE__)
161# define sqliteFree(X) sqliteFree_(X,__FILE__,__LINE__)
162# define sqliteRealloc(X,Y) sqliteRealloc_(X,Y,__FILE__,__LINE__)
163# define sqliteStrDup(X) sqliteStrDup_(X,__FILE__,__LINE__)
164# define sqliteStrNDup(X,Y) sqliteStrNDup_(X,Y,__FILE__,__LINE__)
165 void sqliteStrRealloc(char**);
166#else
167# define sqliteStrRealloc(X)
168#endif
169
170/*
171** This variable gets set if malloc() ever fails. After it gets set,
172** the SQLite library shuts down permanently.
173*/
174extern int sqlite_malloc_failed;
175
176/*
177** The following global variables are used for testing and debugging
178** only. They only work if MEMORY_DEBUG is defined.
179*/
180#ifdef MEMORY_DEBUG
181extern int sqlite_nMalloc; /* Number of sqliteMalloc() calls */
182extern int sqlite_nFree; /* Number of sqliteFree() calls */
183extern int sqlite_iMallocFail; /* Fail sqliteMalloc() after this many calls */
184#endif
185
186/*
187** Name of the master database table. The master database table
188** is a special table that holds the names and attributes of all
189** user tables and indices.
190*/
191#define MASTER_NAME "sqlite_master"
192#define TEMP_MASTER_NAME "sqlite_temp_master"
193
194/*
195** The name of the schema table.
196*/
197#define SCHEMA_TABLE(x) (x?TEMP_MASTER_NAME:MASTER_NAME)
198
199/*
200** A convenience macro that returns the number of elements in
201** an array.
202*/
203#define ArraySize(X) (sizeof(X)/sizeof(X[0]))
204
205/*
206** Forward references to structures
207*/
208typedef struct Column Column;
209typedef struct Table Table;
210typedef struct Index Index;
211typedef struct Instruction Instruction;
212typedef struct Expr Expr;
213typedef struct ExprList ExprList;
214typedef struct Parse Parse;
215typedef struct Token Token;
216typedef struct IdList IdList;
217typedef struct SrcList SrcList;
218typedef struct WhereInfo WhereInfo;
219typedef struct WhereLevel WhereLevel;
220typedef struct Select Select;
221typedef struct AggExpr AggExpr;
222typedef struct FuncDef FuncDef;
223typedef struct Trigger Trigger;
224typedef struct TriggerStep TriggerStep;
225typedef struct TriggerStack TriggerStack;
226typedef struct FKey FKey;
227typedef struct Db Db;
228typedef struct AuthContext AuthContext;
229
230/*
231** Each database file to be accessed by the system is an instance
232** of the following structure. There are normally two of these structures
233** in the sqlite.aDb[] array. aDb[0] is the main database file and
234** aDb[1] is the database file used to hold temporary tables. Additional
235** databases may be attached.
236*/
237struct Db {
238 char *zName; /* Name of this database */
239 Btree *pBt; /* The B*Tree structure for this database file */
240 int schema_cookie; /* Database schema version number for this file */
241 Hash tblHash; /* All tables indexed by name */
242 Hash idxHash; /* All (named) indices indexed by name */
243 Hash trigHash; /* All triggers indexed by name */
244 Hash aFKey; /* Foreign keys indexed by to-table */
245 u8 inTrans; /* 0: not writable. 1: Transaction. 2: Checkpoint */
246 u16 flags; /* Flags associated with this database */
247};
248
249/*
250** These macros can be used to test, set, or clear bits in the
251** Db.flags field.
252*/
253#define DbHasProperty(D,I,P) (((D)->aDb[I].flags&(P))==(P))
254#define DbHasAnyProperty(D,I,P) (((D)->aDb[I].flags&(P))!=0)
255#define DbSetProperty(D,I,P) (D)->aDb[I].flags|=(P)
256#define DbClearProperty(D,I,P) (D)->aDb[I].flags&=~(P)
257
258/*
259** Allowed values for the DB.flags field.
260**
261** The DB_Locked flag is set when the first OP_Transaction or OP_Checkpoint
262** opcode is emitted for a database. This prevents multiple occurances
263** of those opcodes for the same database in the same program. Similarly,
264** the DB_Cookie flag is set when the OP_VerifyCookie opcode is emitted,
265** and prevents duplicate OP_VerifyCookies from taking up space and slowing
266** down execution.
267**
268** The DB_SchemaLoaded flag is set after the database schema has been
269** read into internal hash tables.
270**
271** DB_UnresetViews means that one or more views have column names that
272** have been filled out. If the schema changes, these column names might
273** changes and so the view will need to be reset.
274*/
275#define DB_Locked 0x0001 /* OP_Transaction opcode has been emitted */
276#define DB_Cookie 0x0002 /* OP_VerifyCookie opcode has been emiited */
277#define DB_SchemaLoaded 0x0004 /* The schema has been loaded */
278#define DB_UnresetViews 0x0008 /* Some views have defined column names */
279
280
281/*
282** Each database is an instance of the following structure.
283**
284** The sqlite.file_format is initialized by the database file
285** and helps determines how the data in the database file is
286** represented. This field allows newer versions of the library
287** to read and write older databases. The various file formats
288** are as follows:
289**
290** file_format==1 Version 2.1.0.
291** file_format==2 Version 2.2.0. Add support for INTEGER PRIMARY KEY.
292** file_format==3 Version 2.6.0. Fix empty-string index bug.
293** file_format==4 Version 2.7.0. Add support for separate numeric and
294** text datatypes.
295**
296** The sqlite.temp_store determines where temporary database files
297** are stored. If 1, then a file is created to hold those tables. If
298** 2, then they are held in memory. 0 means use the default value in
299** the TEMP_STORE macro.
300*/
301struct sqlite {
302 int nDb; /* Number of backends currently in use */
303 Db *aDb; /* All backends */
304 Db aDbStatic[2]; /* Static space for the 2 default backends */
305 int flags; /* Miscellanous flags. See below */
306 u8 file_format; /* What file format version is this database? */
307 u8 safety_level; /* How aggressive at synching data to disk */
308 u8 want_to_close; /* Close after all VDBEs are deallocated */
309 int next_cookie; /* Next value of aDb[0].schema_cookie */
310 int cache_size; /* Number of pages to use in the cache */
311 int temp_store; /* 1=file, 2=memory, 0=compile-time default */
312 int nTable; /* Number of tables in the database */
313 void *pBusyArg; /* 1st Argument to the busy callback */
314 int (*xBusyCallback)(void *,const char*,int); /* The busy callback */
315 Hash aFunc; /* All functions that can be in SQL exprs */
316 int lastRowid; /* ROWID of most recent insert */
317 int priorNewRowid; /* Last randomly generated ROWID */
318 int onError; /* Default conflict algorithm */
319 int magic; /* Magic number for detect library misuse */
320 int nChange; /* Number of rows changed */
321 struct Vdbe *pVdbe; /* List of active virtual machines */
322#ifndef SQLITE_OMIT_TRACE
323 void (*xTrace)(void*,const char*); /* Trace function */
324 void *pTraceArg; /* Argument to the trace function */
325#endif
326#ifndef SQLITE_OMIT_AUTHORIZATION
327 int (*xAuth)(void*,int,const char*,const char*,const char*,const char*);
328 /* Access authorization function */
329 void *pAuthArg; /* 1st argument to the access auth function */
330#endif
331};
332
333/*
334** Possible values for the sqlite.flags and or Db.flags fields.
335**
336** On sqlite.flags, the SQLITE_InTrans value means that we have
337** executed a BEGIN. On Db.flags, SQLITE_InTrans means a statement
338** transaction is active on that particular database file.
339*/
340#define SQLITE_VdbeTrace 0x00000001 /* True to trace VDBE execution */
341#define SQLITE_Initialized 0x00000002 /* True after initialization */
342#define SQLITE_Interrupt 0x00000004 /* Cancel current operation */
343#define SQLITE_InTrans 0x00000008 /* True if in a transaction */
344#define SQLITE_InternChanges 0x00000010 /* Uncommitted Hash table changes */
345#define SQLITE_FullColNames 0x00000020 /* Show full column names on SELECT */
346#define SQLITE_CountRows 0x00000040 /* Count rows changed by INSERT, */
347 /* DELETE, or UPDATE and return */
348 /* the count using a callback. */
349#define SQLITE_NullCallback 0x00000080 /* Invoke the callback once if the */
350 /* result set is empty */
351#define SQLITE_ReportTypes 0x00000200 /* Include information on datatypes */
352 /* in 4th argument of callback */
353
354/*
355** Possible values for the sqlite.magic field.
356** The numbers are obtained at random and have no special meaning, other
357** than being distinct from one another.
358*/
359#define SQLITE_MAGIC_OPEN 0xa029a697 /* Database is open */
360#define SQLITE_MAGIC_CLOSED 0x9f3c2d33 /* Database is closed */
361#define SQLITE_MAGIC_BUSY 0xf03b7906 /* Database currently in use */
362#define SQLITE_MAGIC_ERROR 0xb5357930 /* An SQLITE_MISUSE error occurred */
363
364/*
365** Each SQL function is defined by an instance of the following
366** structure. A pointer to this structure is stored in the sqlite.aFunc
367** hash table. When multiple functions have the same name, the hash table
368** points to a linked list of these structures.
369*/
370struct FuncDef {
371 void (*xFunc)(sqlite_func*,int,const char**); /* Regular function */
372 void (*xStep)(sqlite_func*,int,const char**); /* Aggregate function step */
373 void (*xFinalize)(sqlite_func*); /* Aggregate function finializer */
374 int nArg; /* Number of arguments */
375 int dataType; /* Datatype of the result */
376 void *pUserData; /* User data parameter */
377 FuncDef *pNext; /* Next function with same name */
378};
379
380/*
381** information about each column of an SQL table is held in an instance
382** of this structure.
383*/
384struct Column {
385 char *zName; /* Name of this column */
386 char *zDflt; /* Default value of this column */
387 char *zType; /* Data type for this column */
388 u8 notNull; /* True if there is a NOT NULL constraint */
389 u8 isPrimKey; /* True if this column is an INTEGER PRIMARY KEY */
390 u8 sortOrder; /* Some combination of SQLITE_SO_... values */
391};
392
393/*
394** The allowed sort orders.
395**
396** The TEXT and NUM values use bits that do not overlap with DESC and ASC.
397** That way the two can be combined into a single number.
398*/
399#define SQLITE_SO_UNK 0 /* Use the default collating type. (SCT_NUM) */
400#define SQLITE_SO_TEXT 2 /* Sort using memcmp() */
401#define SQLITE_SO_NUM 4 /* Sort using sqliteCompare() */
402#define SQLITE_SO_TYPEMASK 6 /* Mask to extract the collating sequence */
403#define SQLITE_SO_ASC 0 /* Sort in ascending order */
404#define SQLITE_SO_DESC 1 /* Sort in descending order */
405#define SQLITE_SO_DIRMASK 1 /* Mask to extract the sort direction */
406
407/*
408** Each SQL table is represented in memory by an instance of the
409** following structure.
410**
411** Table.zName is the name of the table. The case of the original
412** CREATE TABLE statement is stored, but case is not significant for
413** comparisons.
414**
415** Table.nCol is the number of columns in this table. Table.aCol is a
416** pointer to an array of Column structures, one for each column.
417**
418** If the table has an INTEGER PRIMARY KEY, then Table.iPKey is the index of
419** the column that is that key. Otherwise Table.iPKey is negative. Note
420** that the datatype of the PRIMARY KEY must be INTEGER for this field to
421** be set. An INTEGER PRIMARY KEY is used as the rowid for each row of
422** the table. If a table has no INTEGER PRIMARY KEY, then a random rowid
423** is generated for each row of the table. Table.hasPrimKey is true if
424** the table has any PRIMARY KEY, INTEGER or otherwise.
425**
426** Table.tnum is the page number for the root BTree page of the table in the
427** database file. If Table.iDb is the index of the database table backend
428** in sqlite.aDb[]. 0 is for the main database and 1 is for the file that
429** holds temporary tables and indices. If Table.isTransient
430** is true, then the table is stored in a file that is automatically deleted
431** when the VDBE cursor to the table is closed. In this case Table.tnum
432** refers VDBE cursor number that holds the table open, not to the root
433** page number. Transient tables are used to hold the results of a
434** sub-query that appears instead of a real table name in the FROM clause
435** of a SELECT statement.
436*/
437struct Table {
438 char *zName; /* Name of the table */
439 int nCol; /* Number of columns in this table */
440 Column *aCol; /* Information about each column */
441 int iPKey; /* If not less then 0, use aCol[iPKey] as the primary key */
442 Index *pIndex; /* List of SQL indexes on this table. */
443 int tnum; /* Root BTree node for this table (see note above) */
444 Select *pSelect; /* NULL for tables. Points to definition if a view. */
445 u8 readOnly; /* True if this table should not be written by the user */
446 u8 iDb; /* Index into sqlite.aDb[] of the backend for this table */
447 u8 isTransient; /* True if automatically deleted when VDBE finishes */
448 u8 hasPrimKey; /* True if there exists a primary key */
449 u8 keyConf; /* What to do in case of uniqueness conflict on iPKey */
450 Trigger *pTrigger; /* List of SQL triggers on this table */
451 FKey *pFKey; /* Linked list of all foreign keys in this table */
452};
453
454/*
455** Each foreign key constraint is an instance of the following structure.
456**
457** A foreign key is associated with two tables. The "from" table is
458** the table that contains the REFERENCES clause that creates the foreign
459** key. The "to" table is the table that is named in the REFERENCES clause.
460** Consider this example:
461**
462** CREATE TABLE ex1(
463** a INTEGER PRIMARY KEY,
464** b INTEGER CONSTRAINT fk1 REFERENCES ex2(x)
465** );
466**
467** For foreign key "fk1", the from-table is "ex1" and the to-table is "ex2".
468**
469** Each REFERENCES clause generates an instance of the following structure
470** which is attached to the from-table. The to-table need not exist when
471** the from-table is created. The existance of the to-table is not checked
472** until an attempt is made to insert data into the from-table.
473**
474** The sqlite.aFKey hash table stores pointers to this structure
475** given the name of a to-table. For each to-table, all foreign keys
476** associated with that table are on a linked list using the FKey.pNextTo
477** field.
478*/
479struct FKey {
480 Table *pFrom; /* The table that constains the REFERENCES clause */
481 FKey *pNextFrom; /* Next foreign key in pFrom */
482 char *zTo; /* Name of table that the key points to */
483 FKey *pNextTo; /* Next foreign key that points to zTo */
484 int nCol; /* Number of columns in this key */
485 struct sColMap { /* Mapping of columns in pFrom to columns in zTo */
486 int iFrom; /* Index of column in pFrom */
487 char *zCol; /* Name of column in zTo. If 0 use PRIMARY KEY */
488 } *aCol; /* One entry for each of nCol column s */
489 u8 isDeferred; /* True if constraint checking is deferred till COMMIT */
490 u8 updateConf; /* How to resolve conflicts that occur on UPDATE */
491 u8 deleteConf; /* How to resolve conflicts that occur on DELETE */
492 u8 insertConf; /* How to resolve conflicts that occur on INSERT */
493};
494
495/*
496** SQLite supports many different ways to resolve a contraint
497** error. ROLLBACK processing means that a constraint violation
498** causes the operation in process to fail and for the current transaction
499** to be rolled back. ABORT processing means the operation in process
500** fails and any prior changes from that one operation are backed out,
501** but the transaction is not rolled back. FAIL processing means that
502** the operation in progress stops and returns an error code. But prior
503** changes due to the same operation are not backed out and no rollback
504** occurs. IGNORE means that the particular row that caused the constraint
505** error is not inserted or updated. Processing continues and no error
506** is returned. REPLACE means that preexisting database rows that caused
507** a UNIQUE constraint violation are removed so that the new insert or
508** update can proceed. Processing continues and no error is reported.
509**
510** RESTRICT, SETNULL, and CASCADE actions apply only to foreign keys.
511** RESTRICT is the same as ABORT for IMMEDIATE foreign keys and the
512** same as ROLLBACK for DEFERRED keys. SETNULL means that the foreign
513** key is set to NULL. CASCADE means that a DELETE or UPDATE of the
514** referenced table row is propagated into the row that holds the
515** foreign key.
516**
517** The following symbolic values are used to record which type
518** of action to take.
519*/
520#define OE_None 0 /* There is no constraint to check */
521#define OE_Rollback 1 /* Fail the operation and rollback the transaction */
522#define OE_Abort 2 /* Back out changes but do no rollback transaction */
523#define OE_Fail 3 /* Stop the operation but leave all prior changes */
524#define OE_Ignore 4 /* Ignore the error. Do not do the INSERT or UPDATE */
525#define OE_Replace 5 /* Delete existing record, then do INSERT or UPDATE */
526
527#define OE_Restrict 6 /* OE_Abort for IMMEDIATE, OE_Rollback for DEFERRED */
528#define OE_SetNull 7 /* Set the foreign key value to NULL */
529#define OE_SetDflt 8 /* Set the foreign key value to its default */
530#define OE_Cascade 9 /* Cascade the changes */
531
532#define OE_Default 99 /* Do whatever the default action is */
533
534/*
535** Each SQL index is represented in memory by an
536** instance of the following structure.
537**
538** The columns of the table that are to be indexed are described
539** by the aiColumn[] field of this structure. For example, suppose
540** we have the following table and index:
541**
542** CREATE TABLE Ex1(c1 int, c2 int, c3 text);
543** CREATE INDEX Ex2 ON Ex1(c3,c1);
544**
545** In the Table structure describing Ex1, nCol==3 because there are
546** three columns in the table. In the Index structure describing
547** Ex2, nColumn==2 since 2 of the 3 columns of Ex1 are indexed.
548** The value of aiColumn is {2, 0}. aiColumn[0]==2 because the
549** first column to be indexed (c3) has an index of 2 in Ex1.aCol[].
550** The second column to be indexed (c1) has an index of 0 in
551** Ex1.aCol[], hence Ex2.aiColumn[1]==0.
552**
553** The Index.onError field determines whether or not the indexed columns
554** must be unique and what to do if they are not. When Index.onError=OE_None,
555** it means this is not a unique index. Otherwise it is a unique index
556** and the value of Index.onError indicate the which conflict resolution
557** algorithm to employ whenever an attempt is made to insert a non-unique
558** element.
559*/
560struct Index {
561 char *zName; /* Name of this index */
562 int nColumn; /* Number of columns in the table used by this index */
563 int *aiColumn; /* Which columns are used by this index. 1st is 0 */
564 Table *pTable; /* The SQL table being indexed */
565 int tnum; /* Page containing root of this index in database file */
566 u8 onError; /* OE_Abort, OE_Ignore, OE_Replace, or OE_None */
567 u8 autoIndex; /* True if is automatically created (ex: by UNIQUE) */
568 u8 iDb; /* Index in sqlite.aDb[] of where this index is stored */
569 Index *pNext; /* The next index associated with the same table */
570};
571
572/*
573** Each token coming out of the lexer is an instance of
574** this structure. Tokens are also used as part of an expression.
575*/
576struct Token {
577 const char *z; /* Text of the token. Not NULL-terminated! */
578 unsigned dyn : 1; /* True for malloced memory, false for static */
579 unsigned n : 31; /* Number of characters in this token */
580};
581
582/*
583** Each node of an expression in the parse tree is an instance
584** of this structure.
585**
586** Expr.op is the opcode. The integer parser token codes are reused
587** as opcodes here. For example, the parser defines TK_GE to be an integer
588** code representing the ">=" operator. This same integer code is reused
589** to represent the greater-than-or-equal-to operator in the expression
590** tree.
591**
592** Expr.pRight and Expr.pLeft are subexpressions. Expr.pList is a list
593** of argument if the expression is a function.
594**
595** Expr.token is the operator token for this node. For some expressions
596** that have subexpressions, Expr.token can be the complete text that gave
597** rise to the Expr. In the latter case, the token is marked as being
598** a compound token.
599**
600** An expression of the form ID or ID.ID refers to a column in a table.
601** For such expressions, Expr.op is set to TK_COLUMN and Expr.iTable is
602** the integer cursor number of a VDBE cursor pointing to that table and
603** Expr.iColumn is the column number for the specific column. If the
604** expression is used as a result in an aggregate SELECT, then the
605** value is also stored in the Expr.iAgg column in the aggregate so that
606** it can be accessed after all aggregates are computed.
607**
608** If the expression is a function, the Expr.iTable is an integer code
609** representing which function.
610**
611** The Expr.pSelect field points to a SELECT statement. The SELECT might
612** be the right operand of an IN operator. Or, if a scalar SELECT appears
613** in an expression the opcode is TK_SELECT and Expr.pSelect is the only
614** operand.
615*/
616struct Expr {
617 u8 op; /* Operation performed by this node */
618 u8 dataType; /* Either SQLITE_SO_TEXT or SQLITE_SO_NUM */
619 u8 iDb; /* Database referenced by this expression */
620 u8 flags; /* Various flags. See below */
621 Expr *pLeft, *pRight; /* Left and right subnodes */
622 ExprList *pList; /* A list of expressions used as function arguments
623 ** or in "<expr> IN (<expr-list)" */
624 Token token; /* An operand token */
625 Token span; /* Complete text of the expression */
626 int iTable, iColumn; /* When op==TK_COLUMN, then this expr node means the
627 ** iColumn-th field of the iTable-th table. */
628 int iAgg; /* When op==TK_COLUMN and pParse->useAgg==TRUE, pull
629 ** result from the iAgg-th element of the aggregator */
630 Select *pSelect; /* When the expression is a sub-select. Also the
631 ** right side of "<expr> IN (<select>)" */
632};
633
634/*
635** The following are the meanings of bits in the Expr.flags field.
636*/
637#define EP_FromJoin 0x0001 /* Originated in ON or USING clause of a join */
638#define EP_Oracle8Join 0x0002 /* Carries the Oracle8 "(+)" join operator */
639
640/*
641** These macros can be used to test, set, or clear bits in the
642** Expr.flags field.
643*/
644#define ExprHasProperty(E,P) (((E)->flags&(P))==(P))
645#define ExprHasAnyProperty(E,P) (((E)->flags&(P))!=0)
646#define ExprSetProperty(E,P) (E)->flags|=(P)
647#define ExprClearProperty(E,P) (E)->flags&=~(P)
648
649/*
650** A list of expressions. Each expression may optionally have a
651** name. An expr/name combination can be used in several ways, such
652** as the list of "expr AS ID" fields following a "SELECT" or in the
653** list of "ID = expr" items in an UPDATE. A list of expressions can
654** also be used as the argument to a function, in which case the a.zName
655** field is not used.
656*/
657struct ExprList {
658 int nExpr; /* Number of expressions on the list */
659 struct ExprList_item {
660 Expr *pExpr; /* The list of expressions */
661 char *zName; /* Token associated with this expression */
662 u8 sortOrder; /* 1 for DESC or 0 for ASC */
663 u8 isAgg; /* True if this is an aggregate like count(*) */
664 u8 done; /* A flag to indicate when processing is finished */
665 } *a; /* One entry for each expression */
666};
667
668/*
669** An instance of this structure can hold a simple list of identifiers,
670** such as the list "a,b,c" in the following statements:
671**
672** INSERT INTO t(a,b,c) VALUES ...;
673** CREATE INDEX idx ON t(a,b,c);
674** CREATE TRIGGER trig BEFORE UPDATE ON t(a,b,c) ...;
675**
676** The IdList.a.idx field is used when the IdList represents the list of
677** column names after a table name in an INSERT statement. In the statement
678**
679** INSERT INTO t(a,b,c) ...
680**
681** If "a" is the k-th column of table "t", then IdList.a[0].idx==k.
682*/
683struct IdList {
684 int nId; /* Number of identifiers on the list */
685 struct IdList_item {
686 char *zName; /* Name of the identifier */
687 int idx; /* Index in some Table.aCol[] of a column named zName */
688 } *a;
689};
690
691/*
692** The following structure describes the FROM clause of a SELECT statement.
693** Each table or subquery in the FROM clause is a separate element of
694** the SrcList.a[] array.
695**
696** With the addition of multiple database support, the following structure
697** can also be used to describe a particular table such as the table that
698** is modified by an INSERT, DELETE, or UPDATE statement. In standard SQL,
699** such a table must be a simple name: ID. But in SQLite, the table can
700** now be identified by a database name, a dot, then the table name: ID.ID.
701*/
702struct SrcList {
703 int nSrc; /* Number of tables or subqueries in the FROM clause */
704 struct SrcList_item {
705 char *zDatabase; /* Name of database holding this table */
706 char *zName; /* Name of the table */
707 char *zAlias; /* The "B" part of a "A AS B" phrase. zName is the "A" */
708 Table *pTab; /* An SQL table corresponding to zName */
709 Select *pSelect; /* A SELECT statement used in place of a table name */
710 int jointype; /* Type of join between this table and the next */
711 int iCursor; /* The VDBE cursor number used to access this table */
712 Expr *pOn; /* The ON clause of a join */
713 IdList *pUsing; /* The USING clause of a join */
714 } a[1]; /* One entry for each identifier on the list */
715};
716
717/*
718** Permitted values of the SrcList.a.jointype field
719*/
720#define JT_INNER 0x0001 /* Any kind of inner or cross join */
721#define JT_NATURAL 0x0002 /* True for a "natural" join */
722#define JT_LEFT 0x0004 /* Left outer join */
723#define JT_RIGHT 0x0008 /* Right outer join */
724#define JT_OUTER 0x0010 /* The "OUTER" keyword is present */
725#define JT_ERROR 0x0020 /* unknown or unsupported join type */
726
727/*
728** For each nested loop in a WHERE clause implementation, the WhereInfo
729** structure contains a single instance of this structure. This structure
730** is intended to be private the the where.c module and should not be
731** access or modified by other modules.
732*/
733struct WhereLevel {
734 int iMem; /* Memory cell used by this level */
735 Index *pIdx; /* Index used */
736 int iCur; /* Cursor number used for this index */
737 int score; /* How well this indexed scored */
738 int brk; /* Jump here to break out of the loop */
739 int cont; /* Jump here to continue with the next loop cycle */
740 int op, p1, p2; /* Opcode used to terminate the loop */
741 int iLeftJoin; /* Memory cell used to implement LEFT OUTER JOIN */
742 int top; /* First instruction of interior of the loop */
743 int inOp, inP1, inP2;/* Opcode used to implement an IN operator */
744 int bRev; /* Do the scan in the reverse direction */
745};
746
747/*
748** The WHERE clause processing routine has two halves. The
749** first part does the start of the WHERE loop and the second
750** half does the tail of the WHERE loop. An instance of
751** this structure is returned by the first half and passed
752** into the second half to give some continuity.
753*/
754struct WhereInfo {
755 Parse *pParse;
756 SrcList *pTabList; /* List of tables in the join */
757 int iContinue; /* Jump here to continue with next record */
758 int iBreak; /* Jump here to break out of the loop */
759 int nLevel; /* Number of nested loop */
760 int savedNTab; /* Value of pParse->nTab before WhereBegin() */
761 int peakNTab; /* Value of pParse->nTab after WhereBegin() */
762 WhereLevel a[1]; /* Information about each nest loop in the WHERE */
763};
764
765/*
766** An instance of the following structure contains all information
767** needed to generate code for a single SELECT statement.
768**
769** The zSelect field is used when the Select structure must be persistent.
770** Normally, the expression tree points to tokens in the original input
771** string that encodes the select. But if the Select structure must live
772** longer than its input string (for example when it is used to describe
773** a VIEW) we have to make a copy of the input string so that the nodes
774** of the expression tree will have something to point to. zSelect is used
775** to hold that copy.
776**
777** nLimit is set to -1 if there is no LIMIT clause. nOffset is set to 0.
778** If there is a LIMIT clause, the parser sets nLimit to the value of the
779** limit and nOffset to the value of the offset (or 0 if there is not
780** offset). But later on, nLimit and nOffset become the memory locations
781** in the VDBE that record the limit and offset counters.
782*/
783struct Select {
784 int isDistinct; /* True if the DISTINCT keyword is present */
785 ExprList *pEList; /* The fields of the result */
786 SrcList *pSrc; /* The FROM clause */
787 Expr *pWhere; /* The WHERE clause */
788 ExprList *pGroupBy; /* The GROUP BY clause */
789 Expr *pHaving; /* The HAVING clause */
790 ExprList *pOrderBy; /* The ORDER BY clause */
791 int op; /* One of: TK_UNION TK_ALL TK_INTERSECT TK_EXCEPT */
792 Select *pPrior; /* Prior select in a compound select statement */
793 int nLimit, nOffset; /* LIMIT and OFFSET values. -1 means not used */
794 char *zSelect; /* Complete text of the SELECT command */
795};
796
797/*
798** The results of a select can be distributed in several ways.
799*/
800#define SRT_Callback 1 /* Invoke a callback with each row of result */
801#define SRT_Mem 2 /* Store result in a memory cell */
802#define SRT_Set 3 /* Store result as unique keys in a table */
803#define SRT_Union 5 /* Store result as keys in a table */
804#define SRT_Except 6 /* Remove result from a UNION table */
805#define SRT_Table 7 /* Store result as data with a unique key */
806#define SRT_TempTable 8 /* Store result in a trasient table */
807#define SRT_Discard 9 /* Do not save the results anywhere */
808#define SRT_Sorter 10 /* Store results in the sorter */
809#define SRT_Subroutine 11 /* Call a subroutine to handle results */
810
811/*
812** When a SELECT uses aggregate functions (like "count(*)" or "avg(f1)")
813** we have to do some additional analysis of expressions. An instance
814** of the following structure holds information about a single subexpression
815** somewhere in the SELECT statement. An array of these structures holds
816** all the information we need to generate code for aggregate
817** expressions.
818**
819** Note that when analyzing a SELECT containing aggregates, both
820** non-aggregate field variables and aggregate functions are stored
821** in the AggExpr array of the Parser structure.
822**
823** The pExpr field points to an expression that is part of either the
824** field list, the GROUP BY clause, the HAVING clause or the ORDER BY
825** clause. The expression will be freed when those clauses are cleaned
826** up. Do not try to delete the expression attached to AggExpr.pExpr.
827**
828** If AggExpr.pExpr==0, that means the expression is "count(*)".
829*/
830struct AggExpr {
831 int isAgg; /* if TRUE contains an aggregate function */
832 Expr *pExpr; /* The expression */
833 FuncDef *pFunc; /* Information about the aggregate function */
834};
835
836/*
837** An SQL parser context. A copy of this structure is passed through
838** the parser and down into all the parser action routine in order to
839** carry around information that is global to the entire parse.
840*/
841struct Parse {
842 sqlite *db; /* The main database structure */
843 int rc; /* Return code from execution */
844 sqlite_callback xCallback; /* The callback function */
845 void *pArg; /* First argument to the callback function */
846 char *zErrMsg; /* An error message */
847 Token sErrToken; /* The token at which the error occurred */
848 Token sFirstToken; /* The first token parsed */
849 Token sLastToken; /* The last token parsed */
850 const char *zTail; /* All SQL text past the last semicolon parsed */
851 Table *pNewTable; /* A table being constructed by CREATE TABLE */
852 Vdbe *pVdbe; /* An engine for executing database bytecode */
853 u8 colNamesSet; /* TRUE after OP_ColumnName has been issued to pVdbe */
854 u8 explain; /* True if the EXPLAIN flag is found on the query */
855 u8 initFlag; /* True if reparsing CREATE TABLEs */
856 u8 nameClash; /* A permanent table name clashes with temp table name */
857 u8 useAgg; /* If true, extract field values from the aggregator
858 ** while generating expressions. Normally false */
859 u8 iDb; /* Index of database whose schema is being parsed */
860 u8 useCallback; /* True if callbacks should be used to report results */
861 int newTnum; /* Table number to use when reparsing CREATE TABLEs */
862 int nErr; /* Number of errors seen */
863 int nTab; /* Number of previously allocated VDBE cursors */
864 int nMem; /* Number of memory cells used so far */
865 int nSet; /* Number of sets used so far */
866 int nAgg; /* Number of aggregate expressions */
867 AggExpr *aAgg; /* An array of aggregate expressions */
868 const char *zAuthContext; /* The 6th parameter to db->xAuth callbacks */
869 Trigger *pNewTrigger; /* Trigger under construct by a CREATE TRIGGER */
870 TriggerStack *trigStack; /* Trigger actions being coded */
871};
872
873/*
874** An instance of the following structure can be declared on a stack and used
875** to save the Parse.zAuthContext value so that it can be restored later.
876*/
877struct AuthContext {
878 const char *zAuthContext; /* Put saved Parse.zAuthContext here */
879 Parse *pParse; /* The Parse structure */
880};
881
882/*
883 * Each trigger present in the database schema is stored as an instance of
884 * struct Trigger.
885 *
886 * Pointers to instances of struct Trigger are stored in two ways.
887 * 1. In the "trigHash" hash table (part of the sqlite* that represents the
888 * database). This allows Trigger structures to be retrieved by name.
889 * 2. All triggers associated with a single table form a linked list, using the
890 * pNext member of struct Trigger. A pointer to the first element of the
891 * linked list is stored as the "pTrigger" member of the associated
892 * struct Table.
893 *
894 * The "step_list" member points to the first element of a linked list
895 * containing the SQL statements specified as the trigger program.
896 */
897struct Trigger {
898 char *name; /* The name of the trigger */
899 char *table; /* The table or view to which the trigger applies */
900 u8 iDb; /* Database containing this trigger */
901 u8 iTabDb; /* Database containing Trigger.table */
902 u8 op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT */
903 u8 tr_tm; /* One of TK_BEFORE, TK_AFTER */
904 Expr *pWhen; /* The WHEN clause of the expresion (may be NULL) */
905 IdList *pColumns; /* If this is an UPDATE OF <column-list> trigger,
906 the <column-list> is stored here */
907 int foreach; /* One of TK_ROW or TK_STATEMENT */
908 Token nameToken; /* Token containing zName. Use during parsing only */
909
910 TriggerStep *step_list; /* Link list of trigger program steps */
911 Trigger *pNext; /* Next trigger associated with the table */
912};
913
914/*
915 * An instance of struct TriggerStep is used to store a single SQL statement
916 * that is a part of a trigger-program.
917 *
918 * Instances of struct TriggerStep are stored in a singly linked list (linked
919 * using the "pNext" member) referenced by the "step_list" member of the
920 * associated struct Trigger instance. The first element of the linked list is
921 * the first step of the trigger-program.
922 *
923 * The "op" member indicates whether this is a "DELETE", "INSERT", "UPDATE" or
924 * "SELECT" statement. The meanings of the other members is determined by the
925 * value of "op" as follows:
926 *
927 * (op == TK_INSERT)
928 * orconf -> stores the ON CONFLICT algorithm
929 * pSelect -> If this is an INSERT INTO ... SELECT ... statement, then
930 * this stores a pointer to the SELECT statement. Otherwise NULL.
931 * target -> A token holding the name of the table to insert into.
932 * pExprList -> If this is an INSERT INTO ... VALUES ... statement, then
933 * this stores values to be inserted. Otherwise NULL.
934 * pIdList -> If this is an INSERT INTO ... (<column-names>) VALUES ...
935 * statement, then this stores the column-names to be
936 * inserted into.
937 *
938 * (op == TK_DELETE)
939 * target -> A token holding the name of the table to delete from.
940 * pWhere -> The WHERE clause of the DELETE statement if one is specified.
941 * Otherwise NULL.
942 *
943 * (op == TK_UPDATE)
944 * target -> A token holding the name of the table to update rows of.
945 * pWhere -> The WHERE clause of the UPDATE statement if one is specified.
946 * Otherwise NULL.
947 * pExprList -> A list of the columns to update and the expressions to update
948 * them to. See sqliteUpdate() documentation of "pChanges"
949 * argument.
950 *
951 */
952struct TriggerStep {
953 int op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT, TK_SELECT */
954 int orconf; /* OE_Rollback etc. */
955 Trigger *pTrig; /* The trigger that this step is a part of */
956
957 Select *pSelect; /* Valid for SELECT and sometimes
958 INSERT steps (when pExprList == 0) */
959 Token target; /* Valid for DELETE, UPDATE, INSERT steps */
960 Expr *pWhere; /* Valid for DELETE, UPDATE steps */
961 ExprList *pExprList; /* Valid for UPDATE statements and sometimes
962 INSERT steps (when pSelect == 0) */
963 IdList *pIdList; /* Valid for INSERT statements only */
964
965 TriggerStep * pNext; /* Next in the link-list */
966};
967
968/*
969 * An instance of struct TriggerStack stores information required during code
970 * generation of a single trigger program. While the trigger program is being
971 * coded, its associated TriggerStack instance is pointed to by the
972 * "pTriggerStack" member of the Parse structure.
973 *
974 * The pTab member points to the table that triggers are being coded on. The
975 * newIdx member contains the index of the vdbe cursor that points at the temp
976 * table that stores the new.* references. If new.* references are not valid
977 * for the trigger being coded (for example an ON DELETE trigger), then newIdx
978 * is set to -1. The oldIdx member is analogous to newIdx, for old.* references.
979 *
980 * The ON CONFLICT policy to be used for the trigger program steps is stored
981 * as the orconf member. If this is OE_Default, then the ON CONFLICT clause
982 * specified for individual triggers steps is used.
983 *
984 * struct TriggerStack has a "pNext" member, to allow linked lists to be
985 * constructed. When coding nested triggers (triggers fired by other triggers)
986 * each nested trigger stores its parent trigger's TriggerStack as the "pNext"
987 * pointer. Once the nested trigger has been coded, the pNext value is restored
988 * to the pTriggerStack member of the Parse stucture and coding of the parent
989 * trigger continues.
990 *
991 * Before a nested trigger is coded, the linked list pointed to by the
992 * pTriggerStack is scanned to ensure that the trigger is not about to be coded
993 * recursively. If this condition is detected, the nested trigger is not coded.
994 */
995struct TriggerStack {
996 Table *pTab; /* Table that triggers are currently being coded on */
997 int newIdx; /* Index of vdbe cursor to "new" temp table */
998 int oldIdx; /* Index of vdbe cursor to "old" temp table */
999 int orconf; /* Current orconf policy */
1000 int ignoreJump; /* where to jump to for a RAISE(IGNORE) */
1001 Trigger *pTrigger; /* The trigger currently being coded */
1002 TriggerStack *pNext; /* Next trigger down on the trigger stack */
1003};
1004
1005/*
1006** The following structure contains information used by the sqliteFix...
1007** routines as they walk the parse tree to make database references
1008** explicit.
1009*/
1010typedef struct DbFixer DbFixer;
1011struct DbFixer {
1012 Parse *pParse; /* The parsing context. Error messages written here */
1013 const char *zDb; /* Make sure all objects are contained in this database */
1014 const char *zType; /* Type of the container - used for error messages */
1015 const Token *pName; /* Name of the container - used for error messages */
1016};
1017
1018/*
1019 * This global flag is set for performance testing of triggers. When it is set
1020 * SQLite will perform the overhead of building new and old trigger references
1021 * even when no triggers exist
1022 */
1023extern int always_code_trigger_setup;
1024
1025/*
1026** Internal function prototypes
1027*/
1028int sqliteStrICmp(const char *, const char *);
1029int sqliteStrNICmp(const char *, const char *, int);
1030int sqliteHashNoCase(const char *, int);
1031int sqliteIsNumber(const char*);
1032int sqliteCompare(const char *, const char *);
1033int sqliteSortCompare(const char *, const char *);
1034void sqliteRealToSortable(double r, char *);
1035#ifdef MEMORY_DEBUG
1036 void *sqliteMalloc_(int,int,char*,int);
1037 void sqliteFree_(void*,char*,int);
1038 void *sqliteRealloc_(void*,int,char*,int);
1039 char *sqliteStrDup_(const char*,char*,int);
1040 char *sqliteStrNDup_(const char*, int,char*,int);
1041 void sqliteCheckMemory(void*,int);
1042#else
1043 void *sqliteMalloc(int);
1044 void *sqliteMallocRaw(int);
1045 void sqliteFree(void*);
1046 void *sqliteRealloc(void*,int);
1047 char *sqliteStrDup(const char*);
1048 char *sqliteStrNDup(const char*, int);
1049# define sqliteCheckMemory(a,b)
1050#endif
1051char *sqliteMPrintf(const char *,...);
1052void sqliteSetString(char **, const char *, ...);
1053void sqliteSetNString(char **, ...);
1054void sqliteErrorMsg(Parse*, const char*, ...);
1055void sqliteDequote(char*);
1056int sqliteKeywordCode(const char*, int);
1057int sqliteRunParser(Parse*, const char*, char **);
1058void sqliteExec(Parse*);
1059Expr *sqliteExpr(int, Expr*, Expr*, Token*);
1060void sqliteExprSpan(Expr*,Token*,Token*);
1061Expr *sqliteExprFunction(ExprList*, Token*);
1062void sqliteExprDelete(Expr*);
1063ExprList *sqliteExprListAppend(ExprList*,Expr*,Token*);
1064void sqliteExprListDelete(ExprList*);
1065int sqliteInit(sqlite*, char**);
1066void sqlitePragma(Parse*,Token*,Token*,int);
1067void sqliteResetInternalSchema(sqlite*, int);
1068void sqliteBeginParse(Parse*,int);
1069void sqliteRollbackInternalChanges(sqlite*);
1070void sqliteCommitInternalChanges(sqlite*);
1071Table *sqliteResultSetOfSelect(Parse*,char*,Select*);
1072void sqliteOpenMasterTable(Vdbe *v, int);
1073void sqliteStartTable(Parse*,Token*,Token*,int,int);
1074void sqliteAddColumn(Parse*,Token*);
1075void sqliteAddNotNull(Parse*, int);
1076void sqliteAddPrimaryKey(Parse*, IdList*, int);
1077void sqliteAddColumnType(Parse*,Token*,Token*);
1078void sqliteAddDefaultValue(Parse*,Token*,int);
1079int sqliteCollateType(const char*, int);
1080void sqliteAddCollateType(Parse*, int);
1081void sqliteEndTable(Parse*,Token*,Select*);
1082void sqliteCreateView(Parse*,Token*,Token*,Select*,int);
1083int sqliteViewGetColumnNames(Parse*,Table*);
1084void sqliteDropTable(Parse*, Token*, int);
1085void sqliteDeleteTable(sqlite*, Table*);
1086void sqliteInsert(Parse*, SrcList*, ExprList*, Select*, IdList*, int);
1087IdList *sqliteIdListAppend(IdList*, Token*);
1088int sqliteIdListIndex(IdList*,const char*);
1089SrcList *sqliteSrcListAppend(SrcList*, Token*, Token*);
1090void sqliteSrcListAddAlias(SrcList*, Token*);
1091void sqliteSrcListAssignCursors(Parse*, SrcList*);
1092void sqliteIdListDelete(IdList*);
1093void sqliteSrcListDelete(SrcList*);
1094void sqliteCreateIndex(Parse*,Token*,SrcList*,IdList*,int,int,Token*,Token*);
1095void sqliteDropIndex(Parse*, SrcList*);
1096void sqliteAddKeyType(Vdbe*, ExprList*);
1097void sqliteAddIdxKeyType(Vdbe*, Index*);
1098int sqliteSelect(Parse*, Select*, int, int, Select*, int, int*);
1099Select *sqliteSelectNew(ExprList*,SrcList*,Expr*,ExprList*,Expr*,ExprList*,
1100 int,int,int);
1101void sqliteSelectDelete(Select*);
1102void sqliteSelectUnbind(Select*);
1103Table *sqliteSrcListLookup(Parse*, SrcList*);
1104int sqliteIsReadOnly(Parse*, Table*, int);
1105void sqliteDeleteFrom(Parse*, SrcList*, Expr*);
1106void sqliteUpdate(Parse*, SrcList*, ExprList*, Expr*, int);
1107WhereInfo *sqliteWhereBegin(Parse*, SrcList*, Expr*, int, ExprList**);
1108void sqliteWhereEnd(WhereInfo*);
1109void sqliteExprCode(Parse*, Expr*);
1110void sqliteExprIfTrue(Parse*, Expr*, int, int);
1111void sqliteExprIfFalse(Parse*, Expr*, int, int);
1112Table *sqliteFindTable(sqlite*,const char*, const char*);
1113Table *sqliteLocateTable(Parse*,const char*, const char*);
1114Index *sqliteFindIndex(sqlite*,const char*, const char*);
1115void sqliteUnlinkAndDeleteIndex(sqlite*,Index*);
1116void sqliteCopy(Parse*, SrcList*, Token*, Token*, int);
1117void sqliteVacuum(Parse*, Token*);
1118int sqliteGlobCompare(const unsigned char*,const unsigned char*);
1119int sqliteLikeCompare(const unsigned char*,const unsigned char*);
1120char *sqliteTableNameFromToken(Token*);
1121int sqliteExprCheck(Parse*, Expr*, int, int*);
1122int sqliteExprType(Expr*);
1123int sqliteExprCompare(Expr*, Expr*);
1124int sqliteFuncId(Token*);
1125int sqliteExprResolveIds(Parse*, SrcList*, ExprList*, Expr*);
1126int sqliteExprAnalyzeAggregates(Parse*, Expr*);
1127Vdbe *sqliteGetVdbe(Parse*);
1128int sqliteRandomByte(void);
1129int sqliteRandomInteger(void);
1130void sqliteRollbackAll(sqlite*);
1131void sqliteCodeVerifySchema(Parse*, int);
1132void sqliteBeginTransaction(Parse*, int);
1133void sqliteCommitTransaction(Parse*);
1134void sqliteRollbackTransaction(Parse*);
1135int sqliteExprIsConstant(Expr*);
1136int sqliteExprIsInteger(Expr*, int*);
1137int sqliteIsRowid(const char*);
1138void sqliteGenerateRowDelete(sqlite*, Vdbe*, Table*, int, int);
1139void sqliteGenerateRowIndexDelete(sqlite*, Vdbe*, Table*, int, char*);
1140void sqliteGenerateConstraintChecks(Parse*,Table*,int,char*,int,int,int,int);
1141void sqliteCompleteInsertion(Parse*, Table*, int, char*, int, int, int);
1142void sqliteBeginWriteOperation(Parse*, int, int);
1143void sqliteEndWriteOperation(Parse*);
1144Expr *sqliteExprDup(Expr*);
1145void sqliteTokenCopy(Token*, Token*);
1146ExprList *sqliteExprListDup(ExprList*);
1147SrcList *sqliteSrcListDup(SrcList*);
1148IdList *sqliteIdListDup(IdList*);
1149Select *sqliteSelectDup(Select*);
1150FuncDef *sqliteFindFunction(sqlite*,const char*,int,int,int);
1151void sqliteRegisterBuiltinFunctions(sqlite*);
1152int sqliteSafetyOn(sqlite*);
1153int sqliteSafetyOff(sqlite*);
1154int sqliteSafetyCheck(sqlite*);
1155void sqliteChangeCookie(sqlite*, Vdbe*);
1156void sqliteBeginTrigger(Parse*, Token*,int,int,IdList*,SrcList*,int,Expr*,int);
1157void sqliteFinishTrigger(Parse*, TriggerStep*, Token*);
1158void sqliteDropTrigger(Parse*, SrcList*);
1159void sqliteDropTriggerPtr(Parse*, Trigger*, int);
1160int sqliteTriggersExist(Parse* , Trigger* , int , int , int, ExprList*);
1161int sqliteCodeRowTrigger(Parse*, int, ExprList*, int, Table *, int, int,
1162 int, int);
1163void sqliteViewTriggers(Parse*, Table*, Expr*, int, ExprList*);
1164void sqliteDeleteTriggerStep(TriggerStep*);
1165TriggerStep *sqliteTriggerSelectStep(Select*);
1166TriggerStep *sqliteTriggerInsertStep(Token*, IdList*, ExprList*, Select*, int);
1167TriggerStep *sqliteTriggerUpdateStep(Token*, ExprList*, Expr*, int);
1168TriggerStep *sqliteTriggerDeleteStep(Token*, Expr*);
1169void sqliteDeleteTrigger(Trigger*);
1170int sqliteJoinType(Parse*, Token*, Token*, Token*);
1171void sqliteCreateForeignKey(Parse*, IdList*, Token*, IdList*, int);
1172void sqliteDeferForeignKey(Parse*, int);
1173#ifndef SQLITE_OMIT_AUTHORIZATION
1174 void sqliteAuthRead(Parse*,Expr*,SrcList*);
1175 int sqliteAuthCheck(Parse*,int, const char*, const char*, const char*);
1176 void sqliteAuthContextPush(Parse*, AuthContext*, const char*);
1177 void sqliteAuthContextPop(AuthContext*);
1178#else
1179# define sqliteAuthRead(a,b,c)
1180# define sqliteAuthCheck(a,b,c,d) SQLITE_OK
1181# define sqliteAuthContextPush(a,b,c)
1182# define sqliteAuthContextPop(a)
1183#endif
1184void sqliteAttach(Parse*, Token*, Token*);
1185void sqliteDetach(Parse*, Token*);
1186int sqliteBtreeFactory(const sqlite *db, const char *zFilename,
1187 int mode, int nPg, Btree **ppBtree);
1188int sqliteFixInit(DbFixer*, Parse*, int, const char*, const Token*);
1189int sqliteFixSrcList(DbFixer*, SrcList*);
1190int sqliteFixSelect(DbFixer*, Select*);
1191int sqliteFixExpr(DbFixer*, Expr*);
1192int sqliteFixExprList(DbFixer*, ExprList*);
1193int sqliteFixTriggerStep(DbFixer*, TriggerStep*);

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