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Changes In Branch cost-est Excluding Merge-Ins

This is equivalent to a diff from 7be6222c9e to 9404300ac1

2019-04-27
20:39
Add the shardvtab virtual table that uses the new cost estimation functions. (Leaf check-in: 9404300ac1 user: drh tags: cost-est)
2019-04-26
17:20
An experimental interface for retrieving the estimated cost and estimated number of output rows for a query. (check-in: 1b25fa108a user: drh tags: cost-est)
17:08
Omit tests of the LIKE optimization in like3.test when SQLITE_ENABLE_ICU is defined. (check-in: af53c41a12 user: dan tags: trunk)
2019-04-25
20:06
Merge latest trunk changes into this branch. (check-in: 1da302d85d user: dan tags: dbdata)
18:15
Add the sqlite3_hard_heap_limit64() interface and the corresponding "PRAGMA hard_heap_limit=N" command. (check-in: b0ccef61a7 user: drh tags: hard-heap-limit)
2019-04-24
17:04
New test cases in test/fuzzdata8.db. (check-in: 7be6222c9e user: drh tags: trunk)
16:13
Fix another instance in fts3 where a corrupt record can cause a buffer overflow. (check-in: e1724f1d61 user: dan tags: trunk)

Added ext/misc/shardvtab.c.

Changes to src/shell.c.in.

Changes to src/sqlite.h.in.

Changes to src/vdbe.h.

Changes to src/vdbeInt.h.

Changes to src/vdbeapi.c.

Changes to src/vdbeaux.c.

Changes to src/where.c.

Changes to src/whereInt.h.