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Changes to allow some multi-row UPDATE statements to avoid the two-pass

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approach.

FossilOrigin-Name: 46db23ccd116ce5b9d949f9293be8a2818411b46
This commit is contained in:
dan
2017-01-10 20:04:38 +00:00
parent f112f0b3de
commit f91c1318f4
11 changed files with 228 additions and 76 deletions
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10
src/insert.c
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@@ -1684,7 +1684,7 @@ void sqlite3CompleteInsertion(
int iIdxCur, /* First index cursor */
int regNewData, /* Range of content */
int *aRegIdx, /* Register used by each index. 0 for unused indices */
int isUpdate, /* True for UPDATE, False for INSERT */
int update_flags, /* True for UPDATE, False for INSERT */
int appendBias, /* True if this is likely to be an append */
int useSeekResult /* True to set the USESEEKRESULT flag on OP_[Idx]Insert */
){
@@ -1696,6 +1696,11 @@ void sqlite3CompleteInsertion(
int i; /* Loop counter */
u8 bAffinityDone = 0; /* True if OP_Affinity has been run already */
assert( update_flags==0
|| update_flags==OPFLAG_ISUPDATE
|| update_flags==(OPFLAG_ISUPDATE|OPFLAG_SAVEPOSITION)
);
v = sqlite3GetVdbe(pParse);
assert( v!=0 );
assert( pTab->pSelect==0 ); /* This table is not a VIEW */
@@ -1714,6 +1719,7 @@ void sqlite3CompleteInsertion(
if( IsPrimaryKeyIndex(pIdx) && !HasRowid(pTab) ){
assert( pParse->nested==0 );
pik_flags |= OPFLAG_NCHANGE;
pik_flags |= (update_flags & OPFLAG_SAVEPOSITION);
}
sqlite3VdbeChangeP5(v, pik_flags);
}
@@ -1729,7 +1735,7 @@ void sqlite3CompleteInsertion(
pik_flags = 0;
}else{
pik_flags = OPFLAG_NCHANGE;
pik_flags |= (isUpdate?OPFLAG_ISUPDATE:OPFLAG_LASTROWID);
pik_flags |= (update_flags?update_flags:OPFLAG_LASTROWID);
}
if( appendBias ){
pik_flags |= OPFLAG_APPEND;