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Overview
Comment:Move some things in parse.y so that TK_COLUMN and TK_AGG_COLUMN are assigned the same values as they are on trunk for a very small speedup.
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SHA3-256: d26fdfa3bc5f8d9c4a6000462080b0dd508e5cae9a83e0d126be48195224da8c
User & Date: dan 2019-08-23 20:33:01.837
Context
2019-08-26
20:41
Merge in recent fixes from trunk. (Closed-Leaf check-in: ad816d01d4 user: drh tags: nulls-last)
2019-08-23
21:11
Attempt to parse the NULLS LAST clause more efficiently. A few cycles were saved, but at the expense of more code. And there is a bug was introduced somewhere. Not worth continuing down this line. (Closed-Leaf check-in: 12d2cf8871 user: drh tags: dead-end)
20:33
Move some things in parse.y so that TK_COLUMN and TK_AGG_COLUMN are assigned the same values as they are on trunk for a very small speedup. (check-in: d26fdfa3bc user: dan tags: nulls-last)
17:09
Revise the VDBE comments for NULL-scan so that they also work make sense when reading a NULLS FIRST plan. (check-in: bfe793780f user: drh tags: nulls-last)
Changes
Unified Diff Ignore Whitespace Patch
Changes to src/parse.y.
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%endif /* SQLITE_OMIT_WINDOWFUNC */

/*
** The code generator needs some extra TK_ token values for tokens that
** are synthesized and do not actually appear in the grammar:
*/
%token
  TRUEFALSE       /* True or false keyword */
  ISNOT           /* Combination of IS and NOT */
  FUNCTION        /* A function invocation */
  COLUMN          /* Reference to a table column */
  AGG_FUNCTION    /* An aggregate function */
  AGG_COLUMN      /* An aggregated column */



  UMINUS          /* Unary minus */
  UPLUS           /* Unary plus */
  TRUTH           /* IS TRUE or IS FALSE or IS NOT TRUE or IS NOT FALSE */
  REGISTER        /* Reference to a VDBE register */
  VECTOR          /* Vector */
  SELECT_COLUMN   /* Choose a single column from a multi-column SELECT */
  IF_NULL_ROW     /* the if-null-row operator */








<
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%endif /* SQLITE_OMIT_WINDOWFUNC */

/*
** The code generator needs some extra TK_ token values for tokens that
** are synthesized and do not actually appear in the grammar:
*/
%token



  COLUMN          /* Reference to a table column */
  AGG_FUNCTION    /* An aggregate function */
  AGG_COLUMN      /* An aggregated column */
  TRUEFALSE       /* True or false keyword */
  ISNOT           /* Combination of IS and NOT */
  FUNCTION        /* A function invocation */
  UMINUS          /* Unary minus */
  UPLUS           /* Unary plus */
  TRUTH           /* IS TRUE or IS FALSE or IS NOT TRUE or IS NOT FALSE */
  REGISTER        /* Reference to a VDBE register */
  VECTOR          /* Vector */
  SELECT_COLUMN   /* Choose a single column from a multi-column SELECT */
  IF_NULL_ROW     /* the if-null-row operator */
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