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Recognize certain standard datatypes ("INT", "INTEGER", "REAL", "TEXT", and

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"BLOB") and if a column has one of those datatypes, store the type part of
the bit-field information in the Column structure to save space.

FossilOrigin-Name: d2da62a9df63036b02dadca3798de9e623c2680b3ef0c37d2b18bb88693afd7f
This commit is contained in:
drh
2021-07-30 23:30:30 +00:00
parent e48f261ebf
commit c2df4d6adb
11 changed files with 97 additions and 31 deletions
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src/sqliteInt.h
+19
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@@ -2037,9 +2037,25 @@ struct Column {
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 colFlags; /* Boolean properties. See COLFLAG_ defines below */
};
/* Allowed values for Column.eType.
**
** Values must match entries in the global constant arrays
** sqlite3StdTypeLen[] and sqlite3StdType[]. Each value is one more
** than the offset into these arrays for the corresponding name.
** Adjust the SQLITE_N_STDTYPE value if adding or removing entries.
*/
#define COLTYPE_CUSTOM 0 /* Type appended to zName */
#define COLTYPE_BLOB 1
#define COLTYPE_INT 2
#define COLTYPE_INTEGER 3
#define COLTYPE_REAL 4
#define COLTYPE_TEXT 5
#define SQLITE_N_STDTYPE 5 /* Number of standard types */
/* Allowed values for Column.colFlags.
**
** Constraints:
@@ -4794,6 +4810,9 @@ void sqlite3ValueApplyAffinity(sqlite3_value *, u8, u8);
#ifndef SQLITE_AMALGAMATION
extern const unsigned char sqlite3OpcodeProperty[];
extern const char sqlite3StrBINARY[];
extern const unsigned char sqlite3StdTypeLen[];
extern const char sqlite3StdTypeAffinity[];
extern const char *sqlite3StdType[];
extern const unsigned char sqlite3UpperToLower[];
extern const unsigned char *sqlite3aLTb;
extern const unsigned char *sqlite3aEQb;