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Performance improvement for column name lookup.

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FossilOrigin-Name: 1e4b6a93987cdfbf829e2ff35ef417c290625f2894ad11949e301af518f1fb44
This commit is contained in:
drh
2020-04-06 18:16:31 +00:00
parent 85f2c76cf9
commit d44390c8c5
8 changed files with 37 additions and 15 deletions
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2
src/sqliteInt.h
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@@ -1949,6 +1949,7 @@ struct Column {
u8 notNull; /* An OE_ code for handling a NOT NULL constraint */
char affinity; /* One of the SQLITE_AFF_... values */
u8 szEst; /* Estimated size of value in this column. sizeof(INT)==1 */
u8 hName; /* Column name hash for faster lookup */
u16 colFlags; /* Boolean properties. See COLFLAG_ defines below */
};
@@ -4567,6 +4568,7 @@ int sqlite3MatchEName(
const char*
);
Bitmask sqlite3ExprColUsed(Expr*);
u8 sqlite3StrIHash(const char*);
int sqlite3ResolveExprNames(NameContext*, Expr*);
int sqlite3ResolveExprListNames(NameContext*, ExprList*);
void sqlite3ResolveSelectNames(Parse*, Select*, NameContext*);