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Change to using packed-memory-arrays instead of b-trees when performing an offline merge-sort for CREATE INDEX. This makes it easier to control the number of disc seeks required when merging.

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FossilOrigin-Name: a4770d079c1b236eb54751e75a44cccc997c6b93
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dan
2011-08-04 12:14:04 +00:00
parent 7fe6270b4d
commit c6e734554f
5 changed files with 282 additions and 153 deletions
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src/vdbe.c
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@@ -3155,8 +3155,7 @@ case OP_OpenEphemeral: {
SQLITE_OPEN_DELETEONCLOSE |
SQLITE_OPEN_TRANSIENT_DB;
int btflags = BTREE_OMIT_JOURNAL | pOp->p5;
if( pOp->opcode!=OP_OpenSorter ) btflags |= BTREE_SINGLE;
int btflags = BTREE_OMIT_JOURNAL | BTREE_SINGLE | pOp->p5;
assert( pOp->p1>=0 );
pCx = allocateCursor(p, pOp->p1, pOp->p2, -1, 1);