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14 check-ins using file src/parse.y version 5d4d60e7

Remove the alternative UTF-16 implementation of SUBSTR(). It does not work anymore and the UTF-8 version can do everything that the UTF-16 version does. (CVS 4009) (check-in: 9b91502e user: drh tags: trunk)
Relax the restriction on using bytes 0x80 through 0xbf as the first character of an identifier. Enhancements to ALTER TABLE tests for tables with strange names or stange column names. (CVS 4008) (check-in: 262a3e63 user: drh tags: trunk)
Change the documentation to clearly state that the result of sqlite3_column_type() is undefined following a type conversion. (CVS 4007) (check-in: 960be575 user: drh tags: trunk)
Fix to check-in (4005). A call to sqlite3_column_blob() should not make subsequent calls to sqlite3_column_type() return SQLITE_BLOB. Sqlite3_column_type() returns the initial type. (CVS 4006) (check-in: b5e85deb user: drh tags: trunk)
Clarification on the best practices for using the _bytes() APIs. Change sqlite3_value_blob() to force the representation to be purely a BLOB and not a dual BLOB/String. Ticket #2360. (CVS 4005) (check-in: cf2dd45b user: drh tags: trunk)
A new approach for UTF-8 translation. (CVS 4004) (check-in: 6c8ad279 user: drh tags: trunk)
Do not allow bytes 0x80 through 0xBF to be the first character of an identifer because no valid UTF-8 character can begin with those bytes. If we allowed an identifier to begin with one of those bytes, then the substr() function in ALTER TABLE will not work correctly. (CVS 4003) (check-in: 25281042 user: drh tags: trunk)
Fix some test script errors in fuzz.test. (CVS 4002) (check-in: 51eeae7b user: danielk1977 tags: trunk)
A fix for queries that used correlated, compound sub-queries in the HAVING clause. Also update fuzz.test some more. (CVS 4001) (check-in: da0c1ab4 user: danielk1977 tags: trunk)
Fix problems in ALTER TABLE that occur when column or table names are invalid UTF encodings. (CVS 4000) (check-in: 9ff382f4 user: drh tags: trunk)
Fix a typo in a comment. Ticket #2359. (CVS 3999) (check-in: 1fbbc108 user: drh tags: trunk)
Fix a bug in sqlite3_mprintf() which could have caused a buffer overrun if malloc() failed. (CVS 3998) (check-in: 5af49a57 user: drh tags: trunk)
The built-in substr() function applied to a BLOB counts bytes, not characters. (CVS 3997) (check-in: 75d57308 user: drh tags: trunk)
Make sure the parser aborts quickly following a syntax error. (CVS 3996) (check-in: d07cdd3c user: drh tags: trunk)