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Overview
| Comment: | Improved alignment of fields in the Expr object gives an 8-byte size reduction on 64-bit machines. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
6b252a0d1a78db7bf2d650bafc214ea4 |
| User & Date: | drh 2012-09-13 19:59:09 |
Context
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2012-09-15
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| 13:29 | Factor out the code that generates a co-routine for evaluating the SELECT on the RHS of an INSERT statement so that the same code can potentially be reused in other places. check-in: a93ee09c user: drh tags: trunk | |
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2012-09-13
| ||
| 19:59 | Improved alignment of fields in the Expr object gives an 8-byte size reduction on 64-bit machines. check-in: 6b252a0d user: drh tags: trunk | |
| 16:12 | Fix WAL capability checking in one of the test files. check-in: 0ebe7cc5 user: mistachkin tags: trunk | |
Changes
Changes to src/sqliteInt.h.
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CollSeq *pColl; /* The collation type of the column or 0 */
/* If the EP_Reduced flag is set in the Expr.flags mask, then no
** space is allocated for the fields below this point. An attempt to
** access them will result in a segfault or malfunction.
*********************************************************************/
int iTable; /* TK_COLUMN: cursor number of table holding column
** TK_REGISTER: register number
** TK_TRIGGER: 1 -> new, 0 -> old */
ynVar iColumn; /* TK_COLUMN: column index. -1 for rowid.
** TK_VARIABLE: variable number (always >= 1). */
i16 iAgg; /* Which entry in pAggInfo->aCol[] or ->aFunc[] */
i16 iRightJoinTable; /* If EP_FromJoin, the right table of the join */
u8 flags2; /* Second set of flags. EP2_... */
u8 op2; /* TK_REGISTER: original value of Expr.op
** TK_COLUMN: the value of p5 for OP_Column
** TK_AGG_FUNCTION: nesting depth */
AggInfo *pAggInfo; /* Used by TK_AGG_COLUMN and TK_AGG_FUNCTION */
Table *pTab; /* Table for TK_COLUMN expressions. */
#if SQLITE_MAX_EXPR_DEPTH>0
int nHeight; /* Height of the tree headed by this node */
#endif
};
/*
** The following are the meanings of bits in the Expr.flags field.
*/
#define EP_FromJoin 0x0001 /* Originated in ON or USING clause of a join */
#define EP_Agg 0x0002 /* Contains one or more aggregate functions */
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> > > < < < |
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CollSeq *pColl; /* The collation type of the column or 0 */ /* If the EP_Reduced flag is set in the Expr.flags mask, then no ** space is allocated for the fields below this point. An attempt to ** access them will result in a segfault or malfunction. *********************************************************************/ #if SQLITE_MAX_EXPR_DEPTH>0 int nHeight; /* Height of the tree headed by this node */ #endif int iTable; /* TK_COLUMN: cursor number of table holding column ** TK_REGISTER: register number ** TK_TRIGGER: 1 -> new, 0 -> old */ ynVar iColumn; /* TK_COLUMN: column index. -1 for rowid. ** TK_VARIABLE: variable number (always >= 1). */ i16 iAgg; /* Which entry in pAggInfo->aCol[] or ->aFunc[] */ i16 iRightJoinTable; /* If EP_FromJoin, the right table of the join */ u8 flags2; /* Second set of flags. EP2_... */ u8 op2; /* TK_REGISTER: original value of Expr.op ** TK_COLUMN: the value of p5 for OP_Column ** TK_AGG_FUNCTION: nesting depth */ AggInfo *pAggInfo; /* Used by TK_AGG_COLUMN and TK_AGG_FUNCTION */ Table *pTab; /* Table for TK_COLUMN expressions. */ }; /* ** The following are the meanings of bits in the Expr.flags field. */ #define EP_FromJoin 0x0001 /* Originated in ON or USING clause of a join */ #define EP_Agg 0x0002 /* Contains one or more aggregate functions */ |