Documentation Source Text

Check-in [a5590f5f81]
Login

Many hyperlinks are disabled.
Use anonymous login to enable hyperlinks.

Overview
Comment:Fix a minor error in the datatype documentation.
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | trunk
Files: files | file ages | folders
SHA3-256:a5590f5f81395b8f3a78d6b91cf23a6626f2e9e297f286cefe10ca78bd92976b
User & Date: drh 2019-04-08 18:06:37
Context
2019-04-08
18:08
Fix a minor error in the datatype documentation. Leaf check-in: 87bef3d123 user: drh tags: branch-3.27
18:06
Fix a minor error in the datatype documentation. Leaf check-in: a5590f5f81 user: drh tags: trunk
2019-04-05
21:18
Remove an obsolete reference to the addopcodes.tcl script. check-in: efe862885f user: drh tags: trunk
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Changes to pages/datatype3.in.

323
324
325
326
327
328
329
330
331
332
333
334
335
336
337

<blockquote><pre>
CREATE TABLE t1(a INT, b TEXT, c REAL);
CREATE VIEW v1(x,y,z) AS SELECT b, a+c, 42 FROM t1 WHERE b!=11;
</pre></blockquote>

<p>The affinity of the v1.x column will be the same as the affinity
of t1.b (INTEGER), since v1.x maps directly into t1.b.  But
columns v1.y and v1.z both have no affinity, since those columns
map into expression a+c and 42, and expressions always have no
affinity.

<p>When the [SELECT] statement that implements a [VIEW] or 
FROM-clause subquery is a [compound SELECT] then the affinity of 
each supposed column of the VIEW or subquery will







|







323
324
325
326
327
328
329
330
331
332
333
334
335
336
337

<blockquote><pre>
CREATE TABLE t1(a INT, b TEXT, c REAL);
CREATE VIEW v1(x,y,z) AS SELECT b, a+c, 42 FROM t1 WHERE b!=11;
</pre></blockquote>

<p>The affinity of the v1.x column will be the same as the affinity
of t1.b (TEXT), since v1.x maps directly into t1.b.  But
columns v1.y and v1.z both have no affinity, since those columns
map into expression a+c and 42, and expressions always have no
affinity.

<p>When the [SELECT] statement that implements a [VIEW] or 
FROM-clause subquery is a [compound SELECT] then the affinity of 
each supposed column of the VIEW or subquery will