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Improvements to query invariants in fuzzcheck.

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FossilOrigin-Name: 3a461f61b47e6ba6d5dcc2b7470ebde512b57bc68086f65050e07b06f42b7351
This commit is contained in:
drh
2022-06-15 20:18:44 +00:00
parent e3bf2c8e9b
commit 8f9261a8e9
4 changed files with 26 additions and 11 deletions
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14
test/fuzzinvariants.c
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@ -154,7 +154,15 @@ static char *fuzz_invariant_sql(sqlite3_stmt *pStmt, int iCnt){
int rc;
int nCol = sqlite3_column_count(pStmt);
int mxCnt;
int bDistinct = 0;
int bOrderBy = 0;
switch( iCnt % 4 ){
case 1: bDistinct = 1; break;
case 2: bOrderBy = 1; break;
case 3: bDistinct = bOrderBy = 1; break;
}
iCnt /= 4;
if( nCol==1 ){
mxCnt = 0;
}else{
@ -167,7 +175,8 @@ static char *fuzz_invariant_sql(sqlite3_stmt *pStmt, int iCnt){
while( nIn>0 && (isspace(zIn[nIn-1]) || zIn[nIn-1]==';') ) nIn--;
if( strchr(zIn, '?') ) return 0;
pTest = sqlite3_str_new(0);
sqlite3_str_appendf(pTest, "SELECT * FROM (%.*s)", (int)nIn, zIn);
sqlite3_str_appendf(pTest, "SELECT %s* FROM (%.*s)",
bDistinct ? "DISTINCT " : "", (int)nIn, zIn);
rc = sqlite3_prepare_v2(db, sqlite3_str_value(pTest), -1, &pBase, 0);
if( rc ){
sqlite3_finalize(pBase);
@ -193,6 +202,9 @@ static char *fuzz_invariant_sql(sqlite3_stmt *pStmt, int iCnt){
zAnd = "AND";
}
if( pBase!=pStmt ) sqlite3_finalize(pBase);
if( bOrderBy ){
sqlite3_str_appendf(pTest, " ORDER BY 1");
}
return sqlite3_str_finish(pTest);
}