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Add more bits to the bit vector that is used to disable optimizations for

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built-in test.  Add specific bit patterns to disable ORDER BY using an
index in general and for joins.  Use macros to test for bits in the 
disabled-optimization bit vector, in order to make the code clearer.

FossilOrigin-Name: d2fcba1e143beca8c45724d2108870657c269e17
This commit is contained in:
drh
2012-09-27 15:05:54 +00:00
parent 32634d270c
commit 7e5418e4a4
9 changed files with 77 additions and 63 deletions
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82
src/sqliteInt.h
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@@ -827,6 +827,7 @@ struct sqlite3 {
unsigned int openFlags; /* Flags passed to sqlite3_vfs.xOpen() */
int errCode; /* Most recent error code (SQLITE_*) */
int errMask; /* & result codes with this before returning */
u16 dbOptFlags; /* Flags to enable/disable optimizations */
u8 autoCommit; /* The auto-commit flag. */
u8 temp_store; /* 1: file 2: memory 0: default */
u8 mallocFailed; /* True if we have seen a malloc failure */
@@ -931,46 +932,59 @@ struct sqlite3 {
/*
** Possible values for the sqlite3.flags.
*/
#define SQLITE_VdbeTrace 0x00000100 /* True to trace VDBE execution */
#define SQLITE_InternChanges 0x00000200 /* Uncommitted Hash table changes */
#define SQLITE_FullColNames 0x00000400 /* Show full column names on SELECT */
#define SQLITE_ShortColNames 0x00000800 /* Show short columns names */
#define SQLITE_CountRows 0x00001000 /* Count rows changed by INSERT, */
#define SQLITE_VdbeTrace 0x00000001 /* True to trace VDBE execution */
#define SQLITE_InternChanges 0x00000002 /* Uncommitted Hash table changes */
#define SQLITE_FullColNames 0x00000004 /* Show full column names on SELECT */
#define SQLITE_ShortColNames 0x00000008 /* Show short columns names */
#define SQLITE_CountRows 0x00000010 /* Count rows changed by INSERT, */
/* DELETE, or UPDATE and return */
/* the count using a callback. */
#define SQLITE_NullCallback 0x00002000 /* Invoke the callback once if the */
#define SQLITE_NullCallback 0x00000020 /* Invoke the callback once if the */
/* result set is empty */
#define SQLITE_SqlTrace 0x00004000 /* Debug print SQL as it executes */
#define SQLITE_VdbeListing 0x00008000 /* Debug listings of VDBE programs */
#define SQLITE_WriteSchema 0x00010000 /* OK to update SQLITE_MASTER */
/* 0x00020000 Unused */
#define SQLITE_IgnoreChecks 0x00040000 /* Do not enforce check constraints */
#define SQLITE_ReadUncommitted 0x0080000 /* For shared-cache mode */
#define SQLITE_LegacyFileFmt 0x00100000 /* Create new databases in format 1 */
#define SQLITE_FullFSync 0x00200000 /* Use full fsync on the backend */
#define SQLITE_CkptFullFSync 0x00400000 /* Use full fsync for checkpoint */
#define SQLITE_RecoveryMode 0x00800000 /* Ignore schema errors */
#define SQLITE_ReverseOrder 0x01000000 /* Reverse unordered SELECTs */
#define SQLITE_RecTriggers 0x02000000 /* Enable recursive triggers */
#define SQLITE_ForeignKeys 0x04000000 /* Enforce foreign key constraints */
#define SQLITE_AutoIndex 0x08000000 /* Enable automatic indexes */
#define SQLITE_PreferBuiltin 0x10000000 /* Preference to built-in funcs */
#define SQLITE_LoadExtension 0x20000000 /* Enable load_extension */
#define SQLITE_EnableTrigger 0x40000000 /* True to enable triggers */
#define SQLITE_SqlTrace 0x00000040 /* Debug print SQL as it executes */
#define SQLITE_VdbeListing 0x00000080 /* Debug listings of VDBE programs */
#define SQLITE_WriteSchema 0x00000100 /* OK to update SQLITE_MASTER */
/* 0x00000200 Unused */
#define SQLITE_IgnoreChecks 0x00000400 /* Do not enforce check constraints */
#define SQLITE_ReadUncommitted 0x0000800 /* For shared-cache mode */
#define SQLITE_LegacyFileFmt 0x00001000 /* Create new databases in format 1 */
#define SQLITE_FullFSync 0x00002000 /* Use full fsync on the backend */
#define SQLITE_CkptFullFSync 0x00004000 /* Use full fsync for checkpoint */
#define SQLITE_RecoveryMode 0x00008000 /* Ignore schema errors */
#define SQLITE_ReverseOrder 0x00010000 /* Reverse unordered SELECTs */
#define SQLITE_RecTriggers 0x00020000 /* Enable recursive triggers */
#define SQLITE_ForeignKeys 0x00040000 /* Enforce foreign key constraints */
#define SQLITE_AutoIndex 0x00080000 /* Enable automatic indexes */
#define SQLITE_PreferBuiltin 0x00100000 /* Preference to built-in funcs */
#define SQLITE_LoadExtension 0x00200000 /* Enable load_extension */
#define SQLITE_EnableTrigger 0x00400000 /* True to enable triggers */
/*
** Bits of the sqlite3.flags field that are used by the
** sqlite3_test_control(SQLITE_TESTCTRL_OPTIMIZATIONS,...) interface.
** These must be the low-order bits of the flags field.
** Bits of the sqlite3.dbOptFlags field that are used by the
** sqlite3_test_control(SQLITE_TESTCTRL_OPTIMIZATIONS,...) interface to
** selectively disable various optimizations.
*/
#define SQLITE_QueryFlattener 0x01 /* Disable query flattening */
#define SQLITE_ColumnCache 0x02 /* Disable the column cache */
#define SQLITE_GroupByOrder 0x04 /* Disable GROUPBY cover of ORDERBY */
#define SQLITE_FactorOutConst 0x08 /* Disable factoring out constants */
#define SQLITE_IdxRealAsInt 0x10 /* Store REAL as INT in indices */
#define SQLITE_DistinctOpt 0x20 /* DISTINCT using indexes */
#define SQLITE_CoverIdxScan 0x40 /* Disable covering index scans */
#define SQLITE_OptMask 0xff /* Mask of all disablable opts */
#define SQLITE_QueryFlattener 0x0001 /* Query flattening */
#define SQLITE_ColumnCache 0x0002 /* Column cache */
#define SQLITE_GroupByOrder 0x0004 /* GROUPBY cover of ORDERBY */
#define SQLITE_FactorOutConst 0x0008 /* Constant factoring */
#define SQLITE_IdxRealAsInt 0x0010 /* Store REAL as INT in indices */
#define SQLITE_DistinctOpt 0x0020 /* DISTINCT using indexes */
#define SQLITE_CoverIdxScan 0x0040 /* Covering index scans */
#define SQLITE_OrderByIdx 0x0180 /* ORDER BY using indices */
#define SQLITE_OrderByIdxJoin 0x0100 /* ORDER BY of joins via index */
#define SQLITE_AllOpts 0x01ff /* All optimizations */
/*
** Macros for testing whether or not optimizations are enabled or disabled.
*/
#ifndef SQLITE_OMIT_BUILTIN_TEST
#define OptimizationDisabled(db, mask) (((db)->dbOptFlags&(mask))!=0)
#define OptimizationEnabled(db, mask) (((db)->dbOptFlags&(mask))==0)
#else
#define OptimizationDisabled(db, mask) 0
#define OptimizationEnabled(db, mask) 1
#endif
/*
** Possible values for the sqlite.magic field.