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Comment:State that the COLLATE operator does not change affinity.
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SHA3-256: 5395fed295aee03e17f57aefe54e08f9cde1b8e46e641918465b1cdbd107300b
User & Date: drh 2019-06-11 02:51:24.092
Context
2019-06-11
02:51
State that the COLLATE operator does not change affinity. (Leaf check-in: 5395fed295 user: drh tags: mistake)
2019-05-23
19:37
Add a row for 3.29.0 to the speed-and-size chart. (check-in: 7502249d01 user: drh tags: trunk)
Changes
Unified Diff Ignore Whitespace Patch
Changes to pages/datatype3.in.
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  real table (not a [VIEW] or subquery) then the expression
  has the same affinity as the table column.
  <ul>
  <li><p>^(Parentheses around the column name are ignored.  Hence if
  X and Y.Z are column names, then (X) and (Y.Z) are also considered
  column names and have the affinity of the corresponding columns.)^
  <li><p>
  ^(Any operators applied to column names, including the no-op 

   unary "+" operator, convert the column name into an expression which
   always has no affinity.  Hence even if X and Y.Z are column names, the
   expressions +X and +Y.Z are not column names and have no affinity.)^
  </ul>

  <li><p>^(An expression of the form "CAST(<i>expr</i> AS <i>type</i>)"
  has an affinity that is the same as a column with a declared
  type of "<i>type</i>".)^








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  real table (not a [VIEW] or subquery) then the expression
  has the same affinity as the table column.
  <ul>
  <li><p>^(Parentheses around the column name are ignored.  Hence if
  X and Y.Z are column names, then (X) and (Y.Z) are also considered
  column names and have the affinity of the corresponding columns.)^
  <li><p>
  ^(Any operator applied to column names, including the no-op 
   unary "+" operator but excluding the "COLLATE" operator, 
   converts the column name into an expression which
   always has no affinity.  Hence even if X and Y.Z are column names, the
   expressions +X and +Y.Z are not column names and have no affinity.)^
  </ul>

  <li><p>^(An expression of the form "CAST(<i>expr</i> AS <i>type</i>)"
  has an affinity that is the same as a column with a declared
  type of "<i>type</i>".)^
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