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Cache the sqlite3_context structure in the P4 operand of VDBE programs

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for faster SQL function dispatch.

FossilOrigin-Name: 2abc44eb3b9d489321baa50bc25e17dafbda3687
This commit is contained in:
drh
2015-06-26 18:16:52 +00:00
parent 68cdd0eda2
commit 9c7c913cd6
11 changed files with 179 additions and 106 deletions
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2
src/attach.c
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@@ -359,7 +359,7 @@ static void codeAttach(
assert( v || db->mallocFailed );
if( v ){
sqlite3VdbeAddOp3(v, OP_Function, 0, regArgs+3-pFunc->nArg, regArgs+3);
sqlite3VdbeAddOp3(v, OP_Function0, 0, regArgs+3-pFunc->nArg, regArgs+3);
assert( pFunc->nArg==-1 || (pFunc->nArg&0xff)==pFunc->nArg );
sqlite3VdbeChangeP5(v, (u8)(pFunc->nArg));
sqlite3VdbeChangeP4(v, -1, (char *)pFunc, P4_FUNCDEF);