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Revise the VDBE comments for NULL-scan so that they also work make

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sense when reading a NULLS FIRST plan.

FossilOrigin-Name: bfe793780fa6fc7a1e7d0ee60606dda272985de9573887dca118e9510fc609f2
This commit is contained in:
drh
2019-08-23 17:09:02 +00:00
parent 5f6a4ea2e2
commit a31d3554c5
3 changed files with 10 additions and 10 deletions
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6
src/wherecode.c
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@@ -1691,7 +1691,7 @@ Bitmask sqlite3WhereCodeOneLoopStart(
}
if( regBignull ){
sqlite3VdbeAddOp2(v, OP_Integer, 1, regBignull);
VdbeComment((v, "NULL-scan needed flag"));
VdbeComment((v, "NULL-scan pass ctr"));
}
op = aStartOp[(start_constraints<<2) + (startEq<<1) + bRev];
@@ -1769,7 +1769,7 @@ Bitmask sqlite3WhereCodeOneLoopStart(
if( regBignull ){
/* Except, skip the end-of-range check while doing the NULL-scan */
sqlite3VdbeAddOp2(v, OP_IfNot, regBignull, sqlite3VdbeCurrentAddr(v)+3);
VdbeComment((v, "If NULL-scan active"));
VdbeComment((v, "If NULL-scan 2nd pass"));
VdbeCoverage(v);
}
op = aEndOp[bRev*2 + endEq];
@@ -1786,7 +1786,7 @@ Bitmask sqlite3WhereCodeOneLoopStart(
assert( bSeekPastNull+bStopAtNull==1 );
assert( nConstraint+bSeekPastNull>0 );
sqlite3VdbeAddOp2(v, OP_If, regBignull, sqlite3VdbeCurrentAddr(v)+2);
VdbeComment((v, "If NULL-scan pending"));
VdbeComment((v, "If NULL-scan 1st pass"));
VdbeCoverage(v);
op = aEndOp[bRev*2 + bSeekPastNull];
sqlite3VdbeAddOp4Int(v, op, iIdxCur, addrNxt, regBase,