database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-11-11 01:42:22 +03:00
Code Activity

Refactor the way that DEFAULT expressions are stored on columns, in order

Browse Source 
to save memory in the common case where the column has no DEFAULT clause.

FossilOrigin-Name: 8646547e54211d44c415663c33775c4268550f8332949c4731a4bb6ec9cc663a
This commit is contained in:
drh
2021-07-31 20:30:41 +00:00
parent c2df4d6adb
commit 79cf2b7120
11 changed files with 126 additions and 62 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
src/sqliteInt.h
View File

@@ -2031,13 +2031,13 @@ struct Module {
*/
struct Column {
char *zName; /* Name of this column, \000, then the type */
Expr *pDflt; /* Default value or GENERATED ALWAYS AS value */
char *zColl; /* Collating sequence. If NULL, use the default */
u8 notNull; /* An OE_ code for handling a NOT NULL constraint */
u8 notNull : 4; /* An OE_ code for handling a NOT NULL constraint */
u8 eType : 4; /* One of the standard types */
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 */
u8 eType; /* One of the standard types */
u16 iDflt; /* 1-based index of DEFAULT. 0 means "none" */
u16 colFlags; /* Boolean properties. See COLFLAG_ defines below */
};
@@ -2213,6 +2213,7 @@ struct Table {
char *zColAff; /* String defining the affinity of each column */
ExprList *pCheck; /* All CHECK constraints */
/* ... also used as column name list in a VIEW */
ExprList *pDfltList; /* DEFAULT clauses on various columns */
Pgno tnum; /* Root BTree page for this table */
u32 nTabRef; /* Number of pointers to this Table */
u32 tabFlags; /* Mask of TF_* values */
@@ -4379,6 +4380,8 @@ void sqlite3ResetAllSchemasOfConnection(sqlite3*);
void sqlite3ResetOneSchema(sqlite3*,int);
void sqlite3CollapseDatabaseArray(sqlite3*);
void sqlite3CommitInternalChanges(sqlite3*);
void sqlite3ColumnSetExpr(Parse*,Table*,Column*,Expr*);
Expr *sqlite3ColumnExpr(Table*,Column*);
void sqlite3DeleteColumnNames(sqlite3*,Table*);
void sqlite3GenerateColumnNames(Parse *pParse, Select *pSelect);
int sqlite3ColumnsFromExprList(Parse*,ExprList*,i16*,Column**);
@@ -4517,7 +4520,7 @@ void sqlite3ExprCodeGetColumnOfTable(Vdbe*, Table*, int, int, int);
void sqlite3ExprCodeMove(Parse*, int, int, int);
void sqlite3ExprCode(Parse*, Expr*, int);
#ifndef SQLITE_OMIT_GENERATED_COLUMNS
void sqlite3ExprCodeGeneratedColumn(Parse*, Column*, int);
void sqlite3ExprCodeGeneratedColumn(Parse*, Table*, Column*, int);
#endif
void sqlite3ExprCodeCopy(Parse*, Expr*, int);
void sqlite3ExprCodeFactorable(Parse*, Expr*, int);