Merged PRs

dolt

4821: Change dolt_diff_summary table function to return empty diffs for tab…
…les with pk set changes.
- The 3 argument version returns an error if the table specified has a pk set change.
- The 2 argument verison returns empty diffs and returns a warning.
  I considered approximating the diff for the pk set change, but it feels like an overreach for the customers need.
  Fixes: #4818
4769: Add bats for column truncation on import
Associated GMS PR:
dolthub/go-mysql-server#1403

1408: hashlookups can hash byte slices
fix for: #4682
1407: adding tests for unique indexes
verifies this was fixed: dolthub/go-mysql-server#571
pulls a duplicate key update test from dolt
1406: in memory implementation of prefix indexes

4818: SELECT * from dolt_diff_summary('commitA', 'commitB') should not abort if a primary key change is detected.
4474: dolt migrate fails with "migration failed cause: Incorrect datetime value"
571: Unique indexes do not work in the in-memory implementation

Read Tests	MySQL	Dolt	Multiple
covering_index_scan	1.96	2.71	1.4
groupby_scan	12.3	16.71	1.4
index_join	1.18	4.57	3.9
index_join_scan	1.14	3.89	3.4
index_scan	30.81	53.85	1.7
oltp_point_select	0.15	0.47	3.1
oltp_read_only	3.02	8.74	2.9
select_random_points	0.3	0.75	2.5
select_random_ranges	0.35	1.12	3.2
table_scan	30.81	62.19	2.0
types_table_scan	71.83	189.93	2.6
reads_mean_multiplier			2.6

Write Tests	MySQL	Dolt	Multiple
bulk_insert	0.001	0.001	1.0
oltp_delete_insert	3.02	10.46	3.5
oltp_insert	1.44	2.71	1.9
oltp_read_write	5.18	16.71	3.2
oltp_update_index	1.52	4.74	3.1
oltp_update_non_index	1.47	5.0	3.4
oltp_write_only	2.3	7.98	3.5
types_delete_insert	3.07	12.75	4.2
writes_mean_multiplier			3.0

Overall Mean Multiple	2.7