drh
1df6470d35
When compiling with SQLITE_TEST, extra options are available on the
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"DB version" command for controlling the internal state of the SqliteDb
object, for testing purposes.
FossilOrigin-Name: bf86478d9c6b899d6441e80cf9d17b58731e5d354e31b11f0d58a798f6fab896
2017-10-13 15:56:26 +00:00
drh
99bbcc8287
Undo some unhelpful changes to skip-scan scoring that were added
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by the check-in [9e2b2681] that improved scoring of index scan.
FossilOrigin-Name: c7d51934a4f30d096bb79fc509fc9dd0df5d89a4
2016-07-29 01:32:36 +00:00
drh
e604ec0be0
Add test cases and fix a comment.
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FossilOrigin-Name: 50f8ea37fb9647c4a9da2c269a4d6f54b10ce96b
2016-07-27 19:20:58 +00:00
drh
7a1bca7e74
Deploy heuristics (well-commented) to better estimate how much unindexed terms
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in the WHERE clause filter the number of output rows from a single table.
FossilOrigin-Name: 221659945c3f78d3b6789bfe8fdeb8d3ee1fa038
2014-11-22 18:50:44 +00:00
drh
518140ed04
Change the SQLITE_SCANSTAT_EST parameter so that it returns a double for
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the estimated number of output rows per loop, rather than a 64-bit integer.
Revise the output format for the ".scanstats on" in the shell to make use
of this new capability.
FossilOrigin-Name: f9684000665ae7ef6f89c3773612b8286b8f545a
2014-11-06 03:55:10 +00:00
dan
e2f771b047
Add further tests. Fixes so that compilation without ENABLE_STMT_SCANSTATUS works.
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FossilOrigin-Name: a2303c719222f1effb51acc6b37930561148c00c
2014-11-03 15:33:17 +00:00
dan
037b5324bd
Remove unused variable from struct WhereInfo. Add some explanatory comments to new code.
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FossilOrigin-Name: f5313e0c680d9baebefb1cf50ddadedd4418a334
2014-11-03 11:25:32 +00:00
dan
6f9702ed4d
If SQLITE_ENABLE_STMT_SCANSTATUS is defined, record the number of times each VDBE opcode is executed. Derive the values returned by sqlite3_stmt_scanstatus() from these records on demand.
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FossilOrigin-Name: 9ea37422a8cc2fce51bb10508e5e90f40fd4b511
2014-11-01 20:38:06 +00:00
dan
89e71646df
Minor fixes and documentation improvements for sqlite3_stmt_scanstatus().
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FossilOrigin-Name: 8d8cc9608d30bb65fffcfe488e904411cbbc7f41
2014-11-01 18:08:04 +00:00
dan
04489b6dce
Add the experimental sqlite3_stmt_scanstatus() API.
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FossilOrigin-Name: 6a9bab34aeb6a01b612211a28c140de60a3e883c
2014-10-31 20:11:32 +00:00
