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expression eval: Fix EEOP_JSON_CONSTRUCTOR and EEOP_JSONEXPR size.

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The new expression step types increased the size of ExprEvalStep by ~4 for all
types of expression steps, slowing down expression evaluation noticeably. Move
them out of line.

There's other issues with these expression steps, but addressing them is
largely independent of this aspect.

Author: Andres Freund <andres@anarazel.de>
Reviewed-By: Andrew Dunstan <andrew@dunslane.net>
Discussion: https://postgr.es/m/20220616233130.rparivafipt6doj3@alap3.anarazel.de
Backpatch: 15-
This commit is contained in:
Andres Freund
2022-06-16 18:33:42 -07:00
parent 3f8148c256
commit 67b26703b4
4 changed files with 170 additions and 140 deletions
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93
src/backend/executor/execExpr.c
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@ -2470,32 +2470,38 @@ ExecInitExprRec(Expr *node, ExprState *state,
}
else
{
JsonConstructorExprState *jcstate;
jcstate = palloc0(sizeof(JsonConstructorExprState));
scratch.opcode = EEOP_JSON_CONSTRUCTOR;
scratch.d.json_constructor.constructor = ctor;
scratch.d.json_constructor.arg_values = palloc(sizeof(Datum) * nargs);
scratch.d.json_constructor.arg_nulls = palloc(sizeof(bool) * nargs);
scratch.d.json_constructor.arg_types = palloc(sizeof(Oid) * nargs);
scratch.d.json_constructor.nargs = nargs;
scratch.d.json_constructor.jcstate = jcstate;
jcstate->constructor = ctor;
jcstate->arg_values = palloc(sizeof(Datum) * nargs);
jcstate->arg_nulls = palloc(sizeof(bool) * nargs);
jcstate->arg_types = palloc(sizeof(Oid) * nargs);
jcstate->nargs = nargs;
foreach(lc, args)
{
Expr *arg = (Expr *) lfirst(lc);
scratch.d.json_constructor.arg_types[argno] = exprType((Node *) arg);
jcstate->arg_types[argno] = exprType((Node *) arg);
if (IsA(arg, Const))
{
/* Don't evaluate const arguments every round */
Const *con = (Const *) arg;
scratch.d.json_constructor.arg_values[argno] = con->constvalue;
scratch.d.json_constructor.arg_nulls[argno] = con->constisnull;
jcstate->arg_values[argno] = con->constvalue;
jcstate->arg_nulls[argno] = con->constisnull;
}
else
{
ExecInitExprRec(arg, state,
&scratch.d.json_constructor.arg_values[argno],
&scratch.d.json_constructor.arg_nulls[argno]);
&jcstate->arg_values[argno],
&jcstate->arg_nulls[argno]);
}
argno++;
}
@ -2506,14 +2512,14 @@ ExecInitExprRec(Expr *node, ExprState *state,
bool is_jsonb =
ctor->returning->format->format_type == JS_FORMAT_JSONB;
scratch.d.json_constructor.arg_type_cache =
palloc(sizeof(*scratch.d.json_constructor.arg_type_cache) * nargs);
jcstate->arg_type_cache =
palloc(sizeof(*jcstate->arg_type_cache) * nargs);
for (int i = 0; i < nargs; i++)
{
int category;
Oid outfuncid;
Oid typid = scratch.d.json_constructor.arg_types[i];
Oid typid = jcstate->arg_types[i];
if (is_jsonb)
{
@ -2532,8 +2538,8 @@ ExecInitExprRec(Expr *node, ExprState *state,
category = (int) jscat;
}
scratch.d.json_constructor.arg_type_cache[i].outfuncid = outfuncid;
scratch.d.json_constructor.arg_type_cache[i].category = category;
jcstate->arg_type_cache[i].outfuncid = outfuncid;
jcstate->arg_type_cache[i].category = category;
}
}
@ -2572,41 +2578,44 @@ ExecInitExprRec(Expr *node, ExprState *state,
case T_JsonExpr:
{
JsonExpr *jexpr = castNode(JsonExpr, node);
JsonExprState *jsestate = palloc0(sizeof(JsonExprState));
ListCell *argexprlc;
ListCell *argnamelc;
scratch.opcode = EEOP_JSONEXPR;
scratch.d.jsonexpr.jsexpr = jexpr;
scratch.d.jsonexpr.jsestate = jsestate;
scratch.d.jsonexpr.formatted_expr =
palloc(sizeof(*scratch.d.jsonexpr.formatted_expr));
jsestate->jsexpr = jexpr;
jsestate->formatted_expr =
palloc(sizeof(*jsestate->formatted_expr));
ExecInitExprRec((Expr *) jexpr->formatted_expr, state,
&scratch.d.jsonexpr.formatted_expr->value,
&scratch.d.jsonexpr.formatted_expr->isnull);
&jsestate->formatted_expr->value,
&jsestate->formatted_expr->isnull);
scratch.d.jsonexpr.pathspec =
palloc(sizeof(*scratch.d.jsonexpr.pathspec));
jsestate->pathspec =
palloc(sizeof(*jsestate->pathspec));
ExecInitExprRec((Expr *) jexpr->path_spec, state,
&scratch.d.jsonexpr.pathspec->value,
&scratch.d.jsonexpr.pathspec->isnull);
&jsestate->pathspec->value,
&jsestate->pathspec->isnull);
scratch.d.jsonexpr.res_expr =
palloc(sizeof(*scratch.d.jsonexpr.res_expr));
jsestate->res_expr =
palloc(sizeof(*jsestate->res_expr));
scratch.d.jsonexpr.result_expr = jexpr->result_coercion
jsestate->result_expr = jexpr->result_coercion
? ExecInitExprWithCaseValue((Expr *) jexpr->result_coercion->expr,
state->parent,
&scratch.d.jsonexpr.res_expr->value,
&scratch.d.jsonexpr.res_expr->isnull)
&jsestate->res_expr->value,
&jsestate->res_expr->isnull)
: NULL;
scratch.d.jsonexpr.default_on_empty = !jexpr->on_empty ? NULL :
jsestate->default_on_empty = !jexpr->on_empty ? NULL :
ExecInitExpr((Expr *) jexpr->on_empty->default_expr,
state->parent);
scratch.d.jsonexpr.default_on_error =
jsestate->default_on_error =
ExecInitExpr((Expr *) jexpr->on_error->default_expr,
state->parent);
@ -2617,11 +2626,11 @@ ExecInitExprRec(Expr *node, ExprState *state,
/* lookup the result type's input function */
getTypeInputInfo(jexpr->returning->typid, &typinput,
&scratch.d.jsonexpr.input.typioparam);
fmgr_info(typinput, &scratch.d.jsonexpr.input.func);
&jsestate->input.typioparam);
fmgr_info(typinput, &jsestate->input.func);
}
scratch.d.jsonexpr.args = NIL;
jsestate->args = NIL;
forboth(argexprlc, jexpr->passing_values,
argnamelc, jexpr->passing_names)
@ -2640,11 +2649,11 @@ ExecInitExprRec(Expr *node, ExprState *state,
var->value = (Datum) 0;
var->isnull = true;
scratch.d.jsonexpr.args =
lappend(scratch.d.jsonexpr.args, var);
jsestate->args =
lappend(jsestate->args, var);
}
scratch.d.jsonexpr.cache = NULL;
jsestate->cache = NULL;
if (jexpr->coercions)
{
@ -2653,13 +2662,13 @@ ExecInitExprRec(Expr *node, ExprState *state,
Datum *caseval;
bool *casenull;
scratch.d.jsonexpr.coercion_expr =
palloc(sizeof(*scratch.d.jsonexpr.coercion_expr));
jsestate->coercion_expr =
palloc(sizeof(*jsestate->coercion_expr));
caseval = &scratch.d.jsonexpr.coercion_expr->value;
casenull = &scratch.d.jsonexpr.coercion_expr->isnull;
caseval = &jsestate->coercion_expr->value;
casenull = &jsestate->coercion_expr->isnull;
for (cstate = &scratch.d.jsonexpr.coercions.null,
for (cstate = &jsestate->coercions.null,
coercion = &jexpr->coercions->null;
coercion <= &jexpr->coercions->composite;
coercion++, cstate++)