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Overview
Comment:Clean up the definitions of the TERM_ constants in the code generator. Formatting only - no logic changes.
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SHA3-256: af06f80a590e20f64fa2f630e85fa728c266ea4696b975cc5f2ab72a3b914379
User & Date: drh 2020-01-16 11:51:09
Context
2020-01-16
12:25
Fix an SQL syntax error in the comment on the omit-left-join optimization. No changes to code. check-in: 86b5e5a2 user: drh tags: trunk
11:51
Clean up the definitions of the TERM_ constants in the code generator. Formatting only - no logic changes. check-in: af06f80a user: drh tags: trunk
2020-01-15
16:20
Do not allow the "PRAGMA encoding" statement to change the database encoding if TEMP content exists, or content in any other attached database. Formerly, encoding changes were allowed if just the main database file was empty. Ticket [a08879a4a476eea9]. check-in: 03b003c9 user: drh tags: trunk
Changes
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Changes to src/whereInt.h.

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  Bitmask prereqRight;    /* Bitmask of tables used by pExpr->pRight */
  Bitmask prereqAll;      /* Bitmask of tables referenced by pExpr */
};

/*
** Allowed values of WhereTerm.wtFlags
*/
#define TERM_DYNAMIC    0x01   /* Need to call sqlite3ExprDelete(db, pExpr) */
#define TERM_VIRTUAL    0x02   /* Added by the optimizer.  Do not code */
#define TERM_CODED      0x04   /* This term is already coded */
#define TERM_COPIED     0x08   /* Has a child */
#define TERM_ORINFO     0x10   /* Need to free the WhereTerm.u.pOrInfo object */
#define TERM_ANDINFO    0x20   /* Need to free the WhereTerm.u.pAndInfo obj */
#define TERM_OR_OK      0x40   /* Used during OR-clause processing */
#ifdef SQLITE_ENABLE_STAT4
#  define TERM_VNULL    0x80   /* Manufactured x>NULL or x<=NULL term */
#else
#  define TERM_VNULL    0x00   /* Disabled if not using stat4 */
#endif
#define TERM_LIKEOPT    0x100  /* Virtual terms from the LIKE optimization */
#define TERM_LIKECOND   0x200  /* Conditionally this LIKE operator term */
#define TERM_LIKE       0x400  /* The original LIKE operator */
#define TERM_IS         0x800  /* Term.pExpr is an IS operator */
#define TERM_VARSELECT  0x1000 /* Term.pExpr contains a correlated sub-query */

/*
** An instance of the WhereScan object is used as an iterator for locating
** terms in the WHERE clause that are useful to the query planner.
*/
struct WhereScan {







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  Bitmask prereqRight;    /* Bitmask of tables used by pExpr->pRight */
  Bitmask prereqAll;      /* Bitmask of tables referenced by pExpr */
};

/*
** Allowed values of WhereTerm.wtFlags
*/
#define TERM_DYNAMIC    0x0001 /* Need to call sqlite3ExprDelete(db, pExpr) */
#define TERM_VIRTUAL    0x0002 /* Added by the optimizer.  Do not code */
#define TERM_CODED      0x0004 /* This term is already coded */
#define TERM_COPIED     0x0008 /* Has a child */
#define TERM_ORINFO     0x0010 /* Need to free the WhereTerm.u.pOrInfo object */
#define TERM_ANDINFO    0x0020 /* Need to free the WhereTerm.u.pAndInfo obj */
#define TERM_OR_OK      0x0040 /* Used during OR-clause processing */
#ifdef SQLITE_ENABLE_STAT4
#  define TERM_VNULL    0x0080 /* Manufactured x>NULL or x<=NULL term */
#else
#  define TERM_VNULL    0x0000 /* Disabled if not using stat4 */
#endif
#define TERM_LIKEOPT    0x0100 /* Virtual terms from the LIKE optimization */
#define TERM_LIKECOND   0x0200 /* Conditionally this LIKE operator term */
#define TERM_LIKE       0x0400 /* The original LIKE operator */
#define TERM_IS         0x0800 /* Term.pExpr is an IS operator */
#define TERM_VARSELECT  0x1000 /* Term.pExpr contains a correlated sub-query */

/*
** An instance of the WhereScan object is used as an iterator for locating
** terms in the WHERE clause that are useful to the query planner.
*/
struct WhereScan {