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Overview
Comment:Fix a typo in a comment. No changes to code.
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SHA1: ee4b74250ad7a4061421d44b490cb79f649b3720
User & Date: drh 2015-05-16 18:31:44.355
Context
2015-05-18
04:24
Make a hard copy of the results of a subquery lest the result of the subquery be referenced after a change to the table that generated the subquery result. (check-in: 9c0d80907b user: drh tags: trunk)
2015-05-16
19:17
Fix the transitive constraint processing to only allow transitivity if the operands of the == or IS operator have compatible affinities. (check-in: a46a247fbc user: drh tags: transitive-constraints)
18:31
Fix a typo in a comment. No changes to code. (check-in: ee4b74250a user: drh tags: trunk)
03:41
Improve the clean target in the MSVC makefile. (check-in: 2c1039d454 user: mistachkin tags: trunk)
Changes
Unified Diff Ignore Whitespace Patch
Changes to src/where.c.
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** Check to see if the given expression is a LIKE or GLOB operator that
** can be optimized using inequality constraints.  Return TRUE if it is
** so and false if not.
**
** In order for the operator to be optimizible, the RHS must be a string
** literal that does not begin with a wildcard.  The LHS must be a column
** that may only be NULL, a string, or a BLOB, never a number. (This means
** that virtual tables cannot participate in the LIKE optimization.)  If the
** collating sequence for the column on the LHS must be appropriate for
** the operator.
*/
static int isLikeOrGlob(
  Parse *pParse,    /* Parsing and code generating context */
  Expr *pExpr,      /* Test this expression */
  Expr **ppPrefix,  /* Pointer to TK_STRING expression with pattern prefix */








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632
633
634
635
636
637
638
639
640
641
642
643
644
645
646

** Check to see if the given expression is a LIKE or GLOB operator that
** can be optimized using inequality constraints.  Return TRUE if it is
** so and false if not.
**
** In order for the operator to be optimizible, the RHS must be a string
** literal that does not begin with a wildcard.  The LHS must be a column
** that may only be NULL, a string, or a BLOB, never a number. (This means
** that virtual tables cannot participate in the LIKE optimization.)  The
** collating sequence for the column on the LHS must be appropriate for
** the operator.
*/
static int isLikeOrGlob(
  Parse *pParse,    /* Parsing and code generating context */
  Expr *pExpr,      /* Test this expression */
  Expr **ppPrefix,  /* Pointer to TK_STRING expression with pattern prefix */
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