drh
efad2e2366
Constant propagation is now restricted to just the WHERE clause. The
...
mechanism is changed to take affinity and collation into account. This
seems to give correct answers. But the search for constant propagation
costs 4 million cycles in the speed test.
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2018-07-27 16:57:11 +00:00
mistachkin
1489785be5
Fix typo of 'SQLITE_OMIT_WINDOWFUNC'.
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FossilOrigin-Name: 8607b84a5c53d8c9218c90802160a3000f1138b1f188e411a3af46253e0a69cc
2018-07-23 18:53:49 +00:00
drh
fef37760da
Identify Select objects within a single statement using small sequential
...
integers rather than "0x%p". This is more readable and yields the same result
on successive runs.
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2018-07-10 19:48:35 +00:00
drh
a1fd4b520b
Enhance the TreeView mechanism so that it shows the window function
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data structures as part of the abstract syntax tree.
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2018-07-10 06:32:53 +00:00
drh
0cdbe1aee0
Make the internal dynamic string interface available to extensions using
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the new sqlite3_str object and its associated methods. This is mostly just
a renaming of internal objects and methods to use external names, through
there are a few small wrapper functions.
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2018-05-09 13:46:26 +00:00
drh
4d79983ca5
Optimizations to the new EQP framework.
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2018-05-03 19:47:14 +00:00
drh
fbe07539d3
Fix a formatting issue in the TreeView output for bare expression lists.
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FossilOrigin-Name: a6356817815fe986c4d89475194e0537ebd46582d6df1034482bf08521182bdf
2018-04-23 20:04:38 +00:00
drh
f20609d107
The ".selecttrace 0x2000" command causes just the top-level parse tree to
...
be displayed, after all transformations, and showing the EQP iSelectId at
each level.
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2018-04-23 17:43:35 +00:00
drh
926961dc53
Improved ".selecttrace" output formatting. No changes in non-debug code.
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2018-03-19 16:06:11 +00:00
drh
96acafbea7
Clean up comments and variable names prior to merge.
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2018-02-27 14:49:25 +00:00
drh
43c4ac8bfe
Code simplifications. New test cases.
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2018-02-26 21:26:27 +00:00
drh
3432821192
Enhance TreeView so that it can display the new IS TRUE expression trees.
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2018-02-26 19:03:25 +00:00
drh
5a699a01ca
In the sqlite3TreeViewExprList() routine, show the "AS" alias name for
...
each expression in the list, if it exists.
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2017-12-22 19:53:02 +00:00
drh
8c0833fb21
In the parse tree, combine LIMIT and OFFSET into a single expression rooted
...
on a TK_LIMIT node, for a small code size reduction and performance increase,
and a reduction in code complexity.
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2017-11-14 23:48:23 +00:00
drh
9f6e14c1ef
For sqlite3TreeView() debugging output, show the Expr.flags field on
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scalar subqueries.
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2017-07-10 13:24:58 +00:00
drh
31d6fd5507
Add the TK_IF_NULL_ROW opcode to deal with non-NULL result columns in the
...
result set of a view or subquery on the RHS of a LEFT JOIN that gets flattened.
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2017-04-14 19:03:10 +00:00
drh
d97cda43ab
Enhance the sqlite3TreeView() display for Expr objects so that it shows
...
the iRightJoinTable value for Expr nodes that have the EP_FromJoin property.
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2017-04-14 14:02:14 +00:00
drh
510b7ff536
Fix the sqlite3TreeViewSelect() routine so that it works with a null pointer
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to the Select object.
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2017-03-13 17:37:13 +00:00
drh
54fc5cc2ae
Add an assert() to silence a coverity false-positive.
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2016-11-04 11:23:30 +00:00
drh
55a6f6dc72
Merge recent changes from trunk.
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2016-09-02 23:56:32 +00:00
drh
2e5c5052fd
Fix typos in comments. No changes to running code.
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FossilOrigin-Name: a07269f2a0f87e0b736127f528f6caf3b63f9052
2016-08-27 20:21:51 +00:00
drh
48cb3a7600
Display SELECT_COLUMN expressions in the .wheretrace debugging output.
...
FossilOrigin-Name: 3b27a5da100037f75a4efc15e0354a6aa94194f8
2016-08-18 18:09:10 +00:00
drh
db97e56217
Display VECTOR expressions in .wheretrace and .selecttrace debugging output.
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FossilOrigin-Name: 157347e2580e5078c4081d602e9d1a82d194e719
2016-08-18 17:55:57 +00:00
drh
c84a4020ef
Improvements to WHERE-clause debug tracing. Show TK_MATCH expressions and
...
show more details on WhereTerm traces.
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2016-05-27 12:30:20 +00:00
drh
94fa9c414a
Eliminate the need for the Column.zDflt (using Column.pDflt instead) to reduce
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the amount of memory needed to hold the schema.
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2016-02-27 21:16:04 +00:00
drh
c3489bbf77
Take the LIMIT clause into account when estimating the cost of sorting.
...
FossilOrigin-Name: d491745cab951e0de70f1f79b7640ea8aff6e8bb
2016-02-25 16:04:59 +00:00
drh
5f4a686f8c
Simplification and size reduction to the printf logic. Remove the bFlags
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parameter from sqlite3VXPrintf() and sqlite3XPrintf(). Use sqlite3XPrintf()
instead of sqlite3_snprintf() for rendering P4 values in EXPLAIN output.
FossilOrigin-Name: 0bdb41c45aa1cc8e5c136aaa6605d54b401483bd
2016-01-30 12:50:25 +00:00
drh
2476a6f2cb
Enhance TreeView to show WITH clauses. Add an assert to detect the
...
infinite loop behavior when certain kinds of errors occur on a nested
WITH clause.
FossilOrigin-Name: 2040d88e877bdb69de125a047cefb4a1558e89e8
2015-11-07 15:19:59 +00:00
drh
0b8d255c37
Omit all use of Expr nodes for TK_AS, as those nodes no longer served a useful
...
purpose and in fact interferred with the query planner.
FossilOrigin-Name: 7ab0b258eabfcfb7f1b0bd1b12e166d2f267823d
2015-09-05 22:36:07 +00:00
drh
5579d59fb3
Evaluate expressions only once when the same expression is used in both the
...
result set and in the ORDER BY clause.
FossilOrigin-Name: c2f3bbad778504681b39ab9399a1eb3c1a35ab3f
2015-08-26 14:01:41 +00:00
drh
1c4505de91
Update the TreeView output for compound SELECT statements so that all entries
...
are shown vertically aligned rather than each successive entry being indented.
FossilOrigin-Name: 65a8918776aa395009a690fa86bfc7d99eb973f9
2015-08-26 11:34:31 +00:00
drh
01d230ce05
A list of arguments following a table name translates into equality
...
constraints against hidden columns in that table.
FossilOrigin-Name: 40e12cfe4c29475417ba89fb637b4c763cf74016
2015-08-19 17:11:37 +00:00
drh
8a48b9c0b1
Minor refactor of the SrcList object so that it is able to hold the argument
...
list to a table-valued-function in the FROM clause.
FossilOrigin-Name: b919376147597c4b73421abe5788f893baf1560b
2015-08-19 15:20:00 +00:00
drh
b3d903ebe5
Show the values of Expr.flag in the AST of ".selecttrace"
...
FossilOrigin-Name: a84d1004cbee67f2b8ba1fd201e43af49ea67c1b
2015-06-18 14:09:13 +00:00
drh
38b4149ca1
Factor out the TreeView parse tree printing module into a separate file.
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FossilOrigin-Name: c32ce54ca46a4be4373983be6fd44b1f3a0250d1
2015-06-08 15:08:15 +00:00
