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Re-enable reading from the sqlite_stat3 table (as well as sqlite_stat4).

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FossilOrigin-Name: 6d45078e621526fc2bac0eaefbb0f9602b9a8ec5
This commit is contained in:
dan
2013-08-12 16:34:32 +00:00
parent 5133c78cae
commit 0106e378f1
8 changed files with 326 additions and 35 deletions
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49
src/test_func.c
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@@ -461,6 +461,54 @@ static void real2hex(
sqlite3_result_text(context, zOut, -1, SQLITE_TRANSIENT);
}
/*
** tclcmd: test_extract(record, field)
**
** This function implements an SQL user-function that accepts a blob
** containing a formatted database record as the first argument. The
** second argument is the index of the field within that record to
** extract and return.
*/
static void test_extract(
sqlite3_context *context,
int argc,
sqlite3_value **argv
){
sqlite3 *db = sqlite3_context_db_handle(context);
u8 *pRec;
u8 *pEndHdr; /* Points to one byte past record header */
u8 *pHdr; /* Current point in record header */
u8 *pBody; /* Current point in record data */
u64 nHdr; /* Bytes in record header */
int iIdx; /* Required field */
int iCurrent = 0; /* Current field */
assert( argc==2 );
pRec = (u8*)sqlite3_value_blob(argv[0]);
iIdx = sqlite3_value_int(argv[1]);
pHdr = pRec + sqlite3GetVarint(pRec, &nHdr);
pBody = pEndHdr = &pRec[nHdr];
for(iCurrent=0; pHdr<pEndHdr && iCurrent<=iIdx; iCurrent++){
u64 iSerialType;
Mem mem;
memset(&mem, 0, sizeof(mem));
mem.db = db;
mem.enc = SQLITE_UTF8;
pHdr += sqlite3GetVarint(pHdr, &iSerialType);
pBody += sqlite3VdbeSerialGet(pBody, (u32)iSerialType, &mem);
sqlite3VdbeMemStoreType(&mem);
if( iCurrent==iIdx ){
sqlite3_result_value(context, &mem);
}
sqlite3DbFree(db, mem.zMalloc);
}
}
/*
** tclcmd: test_decode(record)
**
@@ -579,6 +627,7 @@ static int registerTestFunctions(sqlite3 *db){
{ "test_counter", 1, SQLITE_UTF8, counterFunc},
{ "real2hex", 1, SQLITE_UTF8, real2hex},
{ "test_decode", 1, SQLITE_UTF8, test_decode},
{ "test_extract", 2, SQLITE_UTF8, test_extract},
};
int i;