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Change the sqlite3.pDfltColl (the default collating sequence for the

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database connection) so that it is the collating sequence appropriate for
the database encoding, not the UTF8 collating sequence.  This helps to
ensure that the database encoding collation is always used, even for
expressions that do not have an defined collating sequence.
Ticket [1b8d7264567eb6fc].

FossilOrigin-Name: 4a5851893c3d71cc823b6ab5df5e58a852cd322fff26290f1ea05b63d67f564a
This commit is contained in:
drh
2020-03-05 16:13:24 +00:00
parent 4cf2121e1c
commit 42a630b1da
7 changed files with 38 additions and 26 deletions
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19
src/callback.c
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@@ -163,17 +163,30 @@ CollSeq *sqlite3FindCollSeq(
int create /* True to create CollSeq if doesn't already exist */
){
CollSeq *pColl;
assert( SQLITE_UTF8==1 && SQLITE_UTF16LE==2 && SQLITE_UTF16BE==3 );
assert( enc>=SQLITE_UTF8 && enc<=SQLITE_UTF16BE );
if( zName ){
pColl = findCollSeqEntry(db, zName, create);
if( pColl ) pColl += enc-1;
}else{
pColl = db->pDfltColl;
}
assert( SQLITE_UTF8==1 && SQLITE_UTF16LE==2 && SQLITE_UTF16BE==3 );
assert( enc>=SQLITE_UTF8 && enc<=SQLITE_UTF16BE );
if( pColl ) pColl += enc-1;
return pColl;
}
/*
** Change the text encoding for a database connection. This means that
** the pDfltColl must change as well.
*/
void sqlite3SetTextEncoding(sqlite3 *db, u8 enc){
assert( enc==SQLITE_UTF8 || enc==SQLITE_UTF16LE || enc==SQLITE_UTF16BE );
db->enc = enc;
/* EVIDENCE-OF: R-08308-17224 The default collating function for all
** strings is BINARY.
*/
db->pDfltColl = sqlite3FindCollSeq(db, enc, sqlite3StrBINARY, 0);
}
/*
** This function is responsible for invoking the collation factory callback
** or substituting a collation sequence of a different encoding when the