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expression eval, jit: Minor code cleanups.

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This mostly consists of using C99 style for loops, moving variables
into narrower scopes, and a smattering of other minor improvements.
Done separately to make it easier to review patches with actual
functional changes.

Author: Andres Freund
Discussion: https://postgr.es/m/20191023163849.sosqbfs5yenocez3@alap3.anarazel.de
This commit is contained in:
Andres Freund
2020-02-06 19:04:50 -08:00
parent 5ac4e9a12c
commit 1ec7679f1b
3 changed files with 240 additions and 257 deletions
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80
src/backend/executor/execExprInterp.c
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@ -307,18 +307,14 @@ ExecReadyInterpretedExpr(ExprState *state)
* In the direct-threaded implementation, replace each opcode with the
* address to jump to. (Use ExecEvalStepOp() to get back the opcode.)
*/
for (int off = 0; off < state->steps_len; off++)
{
int off;
ExprEvalStep *op = &state->steps[off];
for (off = 0; off < state->steps_len; off++)
{
ExprEvalStep *op = &state->steps[off];
op->opcode = EEO_OPCODE(op->opcode);
}
state->flags |= EEO_FLAG_DIRECT_THREADED;
op->opcode = EEO_OPCODE(op->opcode);
}
state->flags |= EEO_FLAG_DIRECT_THREADED;
#endif /* EEO_USE_COMPUTED_GOTO */
state->evalfunc_private = (void *) ExecInterpExpr;
@ -673,11 +669,11 @@ ExecInterpExpr(ExprState *state, ExprContext *econtext, bool *isnull)
{
FunctionCallInfo fcinfo = op->d.func.fcinfo_data;
NullableDatum *args = fcinfo->args;
int argno;
int nargs = op->d.func.nargs;
Datum d;
/* strict function, so check for NULL args */
for (argno = 0; argno < op->d.func.nargs; argno++)
for (int argno = 0; argno < nargs; argno++)
{
if (args[argno].isnull)
{
@ -1568,29 +1564,28 @@ ExecInterpExpr(ExprState *state, ExprContext *econtext, bool *isnull)
* Check that a strict aggregate transition / combination function's
* input is not NULL.
*/
EEO_CASE(EEOP_AGG_STRICT_INPUT_CHECK_NULLS)
EEO_CASE(EEOP_AGG_STRICT_INPUT_CHECK_ARGS)
{
int argno;
bool *nulls = op->d.agg_strict_input_check.nulls;
NullableDatum *args = op->d.agg_strict_input_check.args;
int nargs = op->d.agg_strict_input_check.nargs;
for (argno = 0; argno < nargs; argno++)
for (int argno = 0; argno < nargs; argno++)
{
if (nulls[argno])
if (args[argno].isnull)
EEO_JUMP(op->d.agg_strict_input_check.jumpnull);
}
EEO_NEXT();
}
EEO_CASE(EEOP_AGG_STRICT_INPUT_CHECK_ARGS)
EEO_CASE(EEOP_AGG_STRICT_INPUT_CHECK_NULLS)
{
int argno;
NullableDatum *args = op->d.agg_strict_input_check.args;
bool *nulls = op->d.agg_strict_input_check.nulls;
int nargs = op->d.agg_strict_input_check.nargs;
for (argno = 0; argno < nargs; argno++)
for (int argno = 0; argno < nargs; argno++)
{
if (args[argno].isnull)
if (nulls[argno])
EEO_JUMP(op->d.agg_strict_input_check.jumpnull);
}
EEO_NEXT();
@ -1825,7 +1820,6 @@ ExecInterpExprStillValid(ExprState *state, ExprContext *econtext, bool *isNull)
void
CheckExprStillValid(ExprState *state, ExprContext *econtext)
{
int i = 0;
TupleTableSlot *innerslot;
TupleTableSlot *outerslot;
TupleTableSlot *scanslot;
@ -1834,7 +1828,7 @@ CheckExprStillValid(ExprState *state, ExprContext *econtext)
outerslot = econtext->ecxt_outertuple;
scanslot = econtext->ecxt_scantuple;
for (i = 0; i < state->steps_len; i++)
for (int i = 0; i < state->steps_len; i++)
{
ExprEvalStep *op = &state->steps[i];
@ -2104,7 +2098,7 @@ ExecJustApplyFuncToCase(ExprState *state, ExprContext *econtext, bool *isnull)
ExprEvalStep *op = &state->steps[0];
FunctionCallInfo fcinfo;
NullableDatum *args;
int argno;
int nargs;
Datum d;
/*
@ -2116,11 +2110,12 @@ ExecJustApplyFuncToCase(ExprState *state, ExprContext *econtext, bool *isnull)
op++;
nargs = op->d.func.nargs;
fcinfo = op->d.func.fcinfo_data;
args = fcinfo->args;
/* strict function, so check for NULL args */
for (argno = 0; argno < op->d.func.nargs; argno++)
for (int argno = 0; argno < nargs; argno++)
{
if (args[argno].isnull)
{
@ -2258,13 +2253,11 @@ ExecInitInterpreter(void)
/* Set up externally-visible pointer to dispatch table */
if (dispatch_table == NULL)
{
int i;
dispatch_table = (const void **)
DatumGetPointer(ExecInterpExpr(NULL, NULL, NULL));
/* build reverse lookup table */
for (i = 0; i < EEOP_LAST; i++)
for (int i = 0; i < EEOP_LAST; i++)
{
reverse_dispatch_table[i].opcode = dispatch_table[i];
reverse_dispatch_table[i].op = (ExprEvalOp) i;
@ -2344,11 +2337,11 @@ ExecEvalFuncExprStrictFusage(ExprState *state, ExprEvalStep *op,
FunctionCallInfo fcinfo = op->d.func.fcinfo_data;
PgStat_FunctionCallUsage fcusage;
NullableDatum *args = fcinfo->args;
int argno;
int nargs = op->d.func.nargs;
Datum d;
/* strict function, so check for NULL args */
for (argno = 0; argno < op->d.func.nargs; argno++)
for (int argno = 0; argno < nargs; argno++)
{
if (args[argno].isnull)
{
@ -2568,7 +2561,6 @@ ExecEvalRowNullInt(ExprState *state, ExprEvalStep *op,
int32 tupTypmod;
TupleDesc tupDesc;
HeapTupleData tmptup;
int att;
*op->resnull = false;
@ -2611,7 +2603,7 @@ ExecEvalRowNullInt(ExprState *state, ExprEvalStep *op,
tmptup.t_len = HeapTupleHeaderGetDatumLength(tuple);
tmptup.t_data = tuple;
for (att = 1; att <= tupDesc->natts; att++)
for (int att = 1; att <= tupDesc->natts; att++)
{
/* ignore dropped columns */
if (TupleDescAttr(tupDesc, att - 1)->attisdropped)
@ -2694,8 +2686,6 @@ ExecEvalArrayExpr(ExprState *state, ExprEvalStep *op)
int32 dataoffset;
char *dat;
int iitem;
int elemoff;
int i;
subdata = (char **) palloc(nelems * sizeof(char *));
subbitmaps = (bits8 **) palloc(nelems * sizeof(bits8 *));
@ -2703,7 +2693,7 @@ ExecEvalArrayExpr(ExprState *state, ExprEvalStep *op)
subnitems = (int *) palloc(nelems * sizeof(int));
/* loop through and get data area from each element */
for (elemoff = 0; elemoff < nelems; elemoff++)
for (int elemoff = 0; elemoff < nelems; elemoff++)
{
Datum arraydatum;
bool eisnull;
@ -2805,7 +2795,7 @@ ExecEvalArrayExpr(ExprState *state, ExprEvalStep *op)
/* setup for multi-D array */
dims[0] = outer_nelems;
lbs[0] = 1;
for (i = 1; i < ndims; i++)
for (int i = 1; i < ndims; i++)
{
dims[i] = elem_dims[i - 1];
lbs[i] = elem_lbs[i - 1];
@ -2832,7 +2822,7 @@ ExecEvalArrayExpr(ExprState *state, ExprEvalStep *op)
dat = ARR_DATA_PTR(result);
iitem = 0;
for (i = 0; i < outer_nelems; i++)
for (int i = 0; i < outer_nelems; i++)
{
memcpy(dat, subdata[i], subbytes[i]);
dat += subbytes[i];
@ -2920,7 +2910,6 @@ ExecEvalMinMax(ExprState *state, ExprEvalStep *op)
bool *nulls = op->d.minmax.nulls;
FunctionCallInfo fcinfo = op->d.minmax.fcinfo_data;
MinMaxOp operator = op->d.minmax.op;
int off;
/* set at initialization */
Assert(fcinfo->args[0].isnull == false);
@ -2929,7 +2918,7 @@ ExecEvalMinMax(ExprState *state, ExprEvalStep *op)
/* default to null result */
*op->resnull = true;
for (off = 0; off < op->d.minmax.nelems; off++)
for (int off = 0; off < op->d.minmax.nelems; off++)
{
/* ignore NULL inputs */
if (nulls[off])
@ -3461,7 +3450,6 @@ ExecEvalScalarArrayOp(ExprState *state, ExprEvalStep *op)
int nitems;
Datum result;
bool resultnull;
int i;
int16 typlen;
bool typbyval;
char typalign;
@ -3529,7 +3517,7 @@ ExecEvalScalarArrayOp(ExprState *state, ExprEvalStep *op)
bitmap = ARR_NULLBITMAP(arr);
bitmask = 1;
for (i = 0; i < nitems; i++)
for (int i = 0; i < nitems; i++)
{
Datum elt;
Datum thisresult;
@ -3641,7 +3629,6 @@ ExecEvalXmlExpr(ExprState *state, ExprEvalStep *op)
{
XmlExpr *xexpr = op->d.xmlexpr.xexpr;
Datum value;
int i;
*op->resnull = true; /* until we get a result */
*op->resvalue = (Datum) 0;
@ -3654,7 +3641,7 @@ ExecEvalXmlExpr(ExprState *state, ExprEvalStep *op)
bool *argnull = op->d.xmlexpr.argnull;
List *values = NIL;
for (i = 0; i < list_length(xexpr->args); i++)
for (int i = 0; i < list_length(xexpr->args); i++)
{
if (!argnull[i])
values = lappend(values, DatumGetPointer(argvalue[i]));
@ -3675,6 +3662,7 @@ ExecEvalXmlExpr(ExprState *state, ExprEvalStep *op)
StringInfoData buf;
ListCell *lc;
ListCell *lc2;
int i;
initStringInfo(&buf);
@ -3968,7 +3956,6 @@ ExecEvalWholeRowVar(ExprState *state, ExprEvalStep *op, ExprContext *econtext)
{
TupleDesc var_tupdesc;
TupleDesc slot_tupdesc;
int i;
/*
* We really only care about numbers of attributes and data types.
@ -4000,7 +3987,7 @@ ExecEvalWholeRowVar(ExprState *state, ExprEvalStep *op, ExprContext *econtext)
slot_tupdesc->natts,
var_tupdesc->natts)));
for (i = 0; i < var_tupdesc->natts; i++)
for (int i = 0; i < var_tupdesc->natts; i++)
{
Form_pg_attribute vattr = TupleDescAttr(var_tupdesc, i);
Form_pg_attribute sattr = TupleDescAttr(slot_tupdesc, i);
@ -4095,11 +4082,10 @@ ExecEvalWholeRowVar(ExprState *state, ExprEvalStep *op, ExprContext *econtext)
/* Check to see if any dropped attributes are non-null */
TupleDesc tupleDesc = slot->tts_tupleDescriptor;
TupleDesc var_tupdesc = op->d.wholerow.tupdesc;
int i;
Assert(var_tupdesc->natts == tupleDesc->natts);
for (i = 0; i < var_tupdesc->natts; i++)
for (int i = 0; i < var_tupdesc->natts; i++)
{
Form_pg_attribute vattr = TupleDescAttr(var_tupdesc, i);
Form_pg_attribute sattr = TupleDescAttr(tupleDesc, i);