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Add the shared schema/pager modifications. Very few tests so far. (CVS 2859)

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FossilOrigin-Name: deeda0dc06c1595aedd8d06a0c4e88a8abf78cf7
This commit is contained in:
danielk1977
2006-01-05 11:34:32 +00:00
parent a6370df1e1
commit da18423620
27 changed files with 1077 additions and 375 deletions
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51
src/sqliteInt.h
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@@ -11,7 +11,7 @@
*************************************************************************
** Internal interface definitions for SQLite.
**
** @(#) $Id: sqliteInt.h,v 1.447 2006/01/04 15:54:36 drh Exp $
** @(#) $Id: sqliteInt.h,v 1.448 2006/01/05 11:34:34 danielk1977 Exp $
*/
#ifndef _SQLITEINT_H_
#define _SQLITEINT_H_
@@ -336,6 +336,7 @@ typedef struct AuthContext AuthContext;
typedef struct CollSeq CollSeq;
typedef struct Column Column;
typedef struct Db Db;
typedef struct DbSchema DbSchema;
typedef struct Expr Expr;
typedef struct ExprList ExprList;
typedef struct FKey FKey;
@@ -367,29 +368,36 @@ typedef struct WhereLevel WhereLevel;
struct Db {
char *zName; /* Name of this database */
Btree *pBt; /* The B*Tree structure for this database file */
u8 inTrans; /* 0: not writable. 1: Transaction. 2: Checkpoint */
u8 safety_level; /* How aggressive at synching data to disk */
int cache_size; /* Number of pages to use in the cache */
void *pAux; /* Auxiliary data. Usually NULL */
void (*xFreeAux)(void*); /* Routine to free pAux */
DbSchema *pSchema; /* Pointer to database schema (possibly shared) */
};
/*
** An instance of the following structure stores a database schema.
*/
struct DbSchema {
int schema_cookie; /* Database schema version number for this file */
Hash tblHash; /* All tables indexed by name */
Hash idxHash; /* All (named) indices indexed by name */
Hash trigHash; /* All triggers indexed by name */
Hash aFKey; /* Foreign keys indexed by to-table */
u16 flags; /* Flags associated with this database */
u8 inTrans; /* 0: not writable. 1: Transaction. 2: Checkpoint */
u8 safety_level; /* How aggressive at synching data to disk */
u8 file_format; /* Schema format version for this file */
int cache_size; /* Number of pages to use in the cache */
Table *pSeqTab; /* The sqlite_sequence table used by AUTOINCREMENT */
void *pAux; /* Auxiliary data. Usually NULL */
void (*xFreeAux)(void*); /* Routine to free pAux */
u8 file_format; /* Schema format version for this file */
u16 flags; /* Flags associated with this schema */
};
/*
** These macros can be used to test, set, or clear bits in the
** Db.flags field.
*/
#define DbHasProperty(D,I,P) (((D)->aDb[I].flags&(P))==(P))
#define DbHasAnyProperty(D,I,P) (((D)->aDb[I].flags&(P))!=0)
#define DbSetProperty(D,I,P) (D)->aDb[I].flags|=(P)
#define DbClearProperty(D,I,P) (D)->aDb[I].flags&=~(P)
#define DbHasProperty(D,I,P) (((D)->aDb[I].pSchema->flags&(P))==(P))
#define DbHasAnyProperty(D,I,P) (((D)->aDb[I].pSchema->flags&(P))!=0)
#define DbSetProperty(D,I,P) (D)->aDb[I].pSchema->flags|=(P)
#define DbClearProperty(D,I,P) (D)->aDb[I].pSchema->flags&=~(P)
/*
** Allowed values for the DB.flags field.
@@ -518,6 +526,7 @@ struct sqlite3 {
#define SQLITE_NoReadlock 0x00001000 /* Readlocks are omitted when
** accessing read-only databases */
#define SQLITE_IgnoreChecks 0x00002000 /* Do not enforce check constraints */
#define SQLITE_ReadUncommitted 0x00004000 /* For shared-cache mode */
/*
** Possible values for the sqlite.magic field.
@@ -672,7 +681,7 @@ struct Table {
int tnum; /* Root BTree node for this table (see note above) */
Select *pSelect; /* NULL for tables. Points to definition if a view. */
u8 readOnly; /* True if this table should not be written by the user */
u8 iDb; /* Index into sqlite.aDb[] of the backend for this table */
// u8 iDb; /* Index into sqlite.aDb[] of the backend for this table */
u8 isTransient; /* True if automatically deleted when VDBE finishes */
u8 hasPrimKey; /* True if there exists a primary key */
u8 keyConf; /* What to do in case of uniqueness conflict on iPKey */
@@ -687,6 +696,7 @@ struct Table {
#ifndef SQLITE_OMIT_ALTERTABLE
int addColOffset; /* Offset in CREATE TABLE statement to add a new column */
#endif
DbSchema *pSchema;
};
/*
@@ -822,9 +832,10 @@ struct Index {
int tnum; /* Page containing root of this index in database file */
u8 onError; /* OE_Abort, OE_Ignore, OE_Replace, or OE_None */
u8 autoIndex; /* True if is automatically created (ex: by UNIQUE) */
u8 iDb; /* Index in sqlite.aDb[] of where this index is stored */
// u8 iDb; /* Index in sqlite.aDb[] of where this index is stored */
char *zColAff; /* String defining the affinity of each column */
Index *pNext; /* The next index associated with the same table */
DbSchema *pSchema;
KeyInfo keyInfo; /* Info on how to order keys. MUST BE LAST */
};
@@ -934,7 +945,7 @@ struct AggInfo {
struct Expr {
u8 op; /* Operation performed by this node */
char affinity; /* The affinity of the column or 0 if not a column */
u8 iDb; /* Database referenced by this expression */
//u8 iDb; /* Database referenced by this expression */
u8 flags; /* Various flags. See below */
CollSeq *pColl; /* The collation type of the column or 0 */
Expr *pLeft, *pRight; /* Left and right subnodes */
@@ -950,6 +961,7 @@ struct Expr {
Select *pSelect; /* When the expression is a sub-select. Also the
** right side of "<expr> IN (<select>)" */
Table *pTab; /* Table for OP_Column expressions. */
DbSchema *pSchema;
};
/*
@@ -1277,7 +1289,7 @@ struct AuthContext {
struct Trigger {
char *name; /* The name of the trigger */
char *table; /* The table or view to which the trigger applies */
u8 iDb; /* Database containing this trigger */
//u8 iDb; /* Database containing this trigger */
u8 iTabDb; /* Database containing Trigger.table */
u8 op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT */
u8 tr_tm; /* One of TRIGGER_BEFORE, TRIGGER_AFTER */
@@ -1286,7 +1298,7 @@ struct Trigger {
the <column-list> is stored here */
int foreach; /* One of TK_ROW or TK_STATEMENT */
Token nameToken; /* Token containing zName. Use during parsing only */
DbSchema *pSchema;
TriggerStep *step_list; /* Link list of trigger program steps */
Trigger *pNext; /* Next trigger associated with the table */
};
@@ -1527,7 +1539,7 @@ void sqlite3SelectDelete(Select*);
void sqlite3SelectUnbind(Select*);
Table *sqlite3SrcListLookup(Parse*, SrcList*);
int sqlite3IsReadOnly(Parse*, Table*, int);
void sqlite3OpenTableForReading(Vdbe*, int iCur, Table*);
void sqlite3OpenTableForReading(Vdbe*, int iCur, int iDb, Table*);
void sqlite3OpenTable(Vdbe*, int iCur, Table*, int);
void sqlite3DeleteFrom(Parse*, SrcList*, Expr*);
void sqlite3Update(Parse*, SrcList*, ExprList*, Expr*, int);
@@ -1700,6 +1712,9 @@ int sqlite3IsLikeFunction(sqlite3*,Expr*,int*,char*);
SqliteTsd *sqlite3Tsd();
void sqlite3AttachFunctions(sqlite3 *);
void sqlite3MinimumFileFormat(Parse*, int, int);
void sqlite3SchemaFree(void *);
DbSchema *sqlite3SchemaGet(Btree *);
int sqlite3SchemaToIndex(sqlite3 *db, DbSchema *);
void sqlite3MallocClearFailed();
#ifdef NDEBUG