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Simplify the Expr compression logic slightly by adding the new EP_FullSize

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property to expressions that are exceptions to the rule and should not be
compressed.

FossilOrigin-Name: d5ae82ec52eafed5e3dc8c9d99685f6523fce7d973ef7e8d9d75ed9b8912426a
This commit is contained in:
drh
2023-10-19 18:07:58 +00:00
parent 0588385799
commit 4e254641ff
5 changed files with 15 additions and 16 deletions
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3
src/sqliteInt.h
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@@ -3047,7 +3047,7 @@ struct Expr {
#define EP_Reduced 0x004000 /* Expr struct EXPR_REDUCEDSIZE bytes only */
#define EP_Win 0x008000 /* Contains window functions */
#define EP_TokenOnly 0x010000 /* Expr struct EXPR_TOKENONLYSIZE bytes only */
/* 0x020000 // Available for reuse */
#define EP_FullSize 0x020000 /* Expr structure must remain full sized */
#define EP_IfNullRow 0x040000 /* The TK_IF_NULL_ROW opcode */
#define EP_Unlikely 0x080000 /* unlikely() or likelihood() function */
#define EP_ConstFunc 0x100000 /* A SQLITE_FUNC_CONSTANT or _SLOCHNG function */
@@ -3077,6 +3077,7 @@ struct Expr {
#define ExprClearProperty(E,P) (E)->flags&=~(P)
#define ExprAlwaysTrue(E) (((E)->flags&(EP_OuterON|EP_IsTrue))==EP_IsTrue)
#define ExprAlwaysFalse(E) (((E)->flags&(EP_OuterON|EP_IsFalse))==EP_IsFalse)
#define ExprIsFullSize(E) (((E)->flags&(EP_Reduced|EP_TokenOnly))==0)
/* Macros used to ensure that the correct members of unions are accessed
** in Expr.