readfuncs.c

Go to the documentation of this file.

/*-------------------------------------------------------------------------
 *
 * readfuncs.c
 *    Reader functions for Postgres tree nodes.
 *
 * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 *
 * IDENTIFICATION
 *    src/backend/nodes/readfuncs.c
 *
 * NOTES
 *    Path nodes do not have any readfuncs support, because we never
 *    have occasion to read them in.  (There was once code here that
 *    claimed to read them, but it was broken as well as unused.)  We
 *    never read executor state trees, either.
 *
 *    Parse location fields are written out by outfuncs.c, but only for
 *    debugging use.  When reading a location field, we normally discard
 *    the stored value and set the location field to -1 (ie, "unknown").
 *    This is because nodes coming from a stored rule should not be thought
 *    to have a known location in the current query's text.
 *    However, if restore_location_fields is true, we do restore location
 *    fields from the string.  This is currently intended only for use by the
 *    WRITE_READ_PARSE_PLAN_TREES test code, which doesn't want to cause
 *    any change in the node contents.
 *
 *-------------------------------------------------------------------------
 */
#include "postgres.h"

#include <math.h>

#include "fmgr.h"
#include "miscadmin.h"
#include "nodes/extensible.h"
#include "nodes/parsenodes.h"
#include "nodes/plannodes.h"
#include "nodes/readfuncs.h"
#include "utils/builtins.h"


/*
 * Macros to simplify reading of different kinds of fields.  Use these
 * wherever possible to reduce the chance for silly typos.  Note that these
 * hard-wire conventions about the names of the local variables in a Read
 * routine.
 */

/* Macros for declaring appropriate local variables */

/* A few guys need only local_node */
#define READ_LOCALS_NO_FIELDS(nodeTypeName) \
    nodeTypeName *local_node = makeNode(nodeTypeName)

/* And a few guys need only the pg_strtok support fields */
#define READ_TEMP_LOCALS()  \
    const char *token;      \
    int         length

/* ... but most need both */
#define READ_LOCALS(nodeTypeName)           \
    READ_LOCALS_NO_FIELDS(nodeTypeName);    \
    READ_TEMP_LOCALS()

/* Read an integer field (anything written as ":fldname %d") */
#define READ_INT_FIELD(fldname) \
    token = pg_strtok(&length);     /* skip :fldname */ \
    token = pg_strtok(&length);     /* get field value */ \
    local_node->fldname = atoi(token)

/* Read an unsigned integer field (anything written as ":fldname %u") */
#define READ_UINT_FIELD(fldname) \
    token = pg_strtok(&length);     /* skip :fldname */ \
    token = pg_strtok(&length);     /* get field value */ \
    local_node->fldname = atoui(token)

/* Read an unsigned integer field (anything written using UINT64_FORMAT) */
#define READ_UINT64_FIELD(fldname) \
    token = pg_strtok(&length);     /* skip :fldname */ \
    token = pg_strtok(&length);     /* get field value */ \
    local_node->fldname = pg_strtouint64(token, NULL, 10)

/* Read a long integer field (anything written as ":fldname %ld") */
#define READ_LONG_FIELD(fldname) \
    token = pg_strtok(&length);     /* skip :fldname */ \
    token = pg_strtok(&length);     /* get field value */ \
    local_node->fldname = atol(token)

/* Read an OID field (don't hard-wire assumption that OID is same as uint) */
#define READ_OID_FIELD(fldname) \
    token = pg_strtok(&length);     /* skip :fldname */ \
    token = pg_strtok(&length);     /* get field value */ \
    local_node->fldname = atooid(token)

/* Read a char field (ie, one ascii character) */
#define READ_CHAR_FIELD(fldname) \
    token = pg_strtok(&length);     /* skip :fldname */ \
    token = pg_strtok(&length);     /* get field value */ \
    /* avoid overhead of calling debackslash() for one char */ \
    local_node->fldname = (length == 0) ? '\0' : (token[0] == '\\' ? token[1] : token[0])

/* Read an enumerated-type field that was written as an integer code */
#define READ_ENUM_FIELD(fldname, enumtype) \
    token = pg_strtok(&length);     /* skip :fldname */ \
    token = pg_strtok(&length);     /* get field value */ \
    local_node->fldname = (enumtype) atoi(token)

/* Read a float field */
#define READ_FLOAT_FIELD(fldname) \
    token = pg_strtok(&length);     /* skip :fldname */ \
    token = pg_strtok(&length);     /* get field value */ \
    local_node->fldname = atof(token)

/* Read a boolean field */
#define READ_BOOL_FIELD(fldname) \
    token = pg_strtok(&length);     /* skip :fldname */ \
    token = pg_strtok(&length);     /* get field value */ \
    local_node->fldname = strtobool(token)

/* Read a character-string field */
#define READ_STRING_FIELD(fldname) \
    token = pg_strtok(&length);     /* skip :fldname */ \
    token = pg_strtok(&length);     /* get field value */ \
    local_node->fldname = nullable_string(token, length)

/* Read a parse location field (and possibly throw away the value) */
#ifdef WRITE_READ_PARSE_PLAN_TREES
#define READ_LOCATION_FIELD(fldname) \
    token = pg_strtok(&length);     /* skip :fldname */ \
    token = pg_strtok(&length);     /* get field value */ \
    local_node->fldname = restore_location_fields ? atoi(token) : -1
#else
#define READ_LOCATION_FIELD(fldname) \
    token = pg_strtok(&length);     /* skip :fldname */ \
    token = pg_strtok(&length);     /* get field value */ \
    (void) token;               /* in case not used elsewhere */ \
    local_node->fldname = -1    /* set field to "unknown" */
#endif

/* Read a Node field */
#define READ_NODE_FIELD(fldname) \
    token = pg_strtok(&length);     /* skip :fldname */ \
    (void) token;               /* in case not used elsewhere */ \
    local_node->fldname = nodeRead(NULL, 0)

/* Read a bitmapset field */
#define READ_BITMAPSET_FIELD(fldname) \
    token = pg_strtok(&length);     /* skip :fldname */ \
    (void) token;               /* in case not used elsewhere */ \
    local_node->fldname = _readBitmapset()

/* Read an attribute number array */
#define READ_ATTRNUMBER_ARRAY(fldname, len) \
    token = pg_strtok(&length);     /* skip :fldname */ \
    local_node->fldname = readAttrNumberCols(len)

/* Read an oid array */
#define READ_OID_ARRAY(fldname, len) \
    token = pg_strtok(&length);     /* skip :fldname */ \
    local_node->fldname = readOidCols(len)

/* Read an int array */
#define READ_INT_ARRAY(fldname, len) \
    token = pg_strtok(&length);     /* skip :fldname */ \
    local_node->fldname = readIntCols(len)

/* Read a bool array */
#define READ_BOOL_ARRAY(fldname, len) \
    token = pg_strtok(&length);     /* skip :fldname */ \
    local_node->fldname = readBoolCols(len)

/* Routine exit */
#define READ_DONE() \
    return local_node


/*
 * NOTE: use atoi() to read values written with %d, or atoui() to read
 * values written with %u in outfuncs.c.  An exception is OID values,
 * for which use atooid().  (As of 7.1, outfuncs.c writes OIDs as %u,
 * but this will probably change in the future.)
 */
#define atoui(x)  ((unsigned int) strtoul((x), NULL, 10))

#define strtobool(x)  ((*(x) == 't') ? true : false)

#define nullable_string(token,length)  \
    ((length) == 0 ? NULL : debackslash(token, length))


/*
 * _readBitmapset
 */
static Bitmapset *
_readBitmapset(void)
{
    Bitmapset  *result = NULL;

    READ_TEMP_LOCALS();

    token = pg_strtok(&length);
    if (token == NULL)
        elog(ERROR, "incomplete Bitmapset structure");
    if (length != 1 || token[0] != '(')
        elog(ERROR, "unrecognized token: \"%.*s\"", length, token);

    token = pg_strtok(&length);
    if (token == NULL)
        elog(ERROR, "incomplete Bitmapset structure");
    if (length != 1 || token[0] != 'b')
        elog(ERROR, "unrecognized token: \"%.*s\"", length, token);

    for (;;)
    {
        int         val;
        char       *endptr;

        token = pg_strtok(&length);
        if (token == NULL)
            elog(ERROR, "unterminated Bitmapset structure");
        if (length == 1 && token[0] == ')')
            break;
        val = (int) strtol(token, &endptr, 10);
        if (endptr != token + length)
            elog(ERROR, "unrecognized integer: \"%.*s\"", length, token);
        result = bms_add_member(result, val);
    }

    return result;
}

/*
 * for use by extensions which define extensible nodes
 */
Bitmapset *
readBitmapset(void)
{
    return _readBitmapset();
}

/*
 * _readQuery
 */
static Query *
_readQuery(void)
{
    READ_LOCALS(Query);

    READ_ENUM_FIELD(commandType, CmdType);
    READ_ENUM_FIELD(querySource, QuerySource);
    local_node->queryId = UINT64CONST(0);   /* not saved in output format */
    READ_BOOL_FIELD(canSetTag);
    READ_NODE_FIELD(utilityStmt);
    READ_INT_FIELD(resultRelation);
    READ_BOOL_FIELD(hasAggs);
    READ_BOOL_FIELD(hasWindowFuncs);
    READ_BOOL_FIELD(hasTargetSRFs);
    READ_BOOL_FIELD(hasSubLinks);
    READ_BOOL_FIELD(hasDistinctOn);
    READ_BOOL_FIELD(hasRecursive);
    READ_BOOL_FIELD(hasModifyingCTE);
    READ_BOOL_FIELD(hasForUpdate);
    READ_BOOL_FIELD(hasRowSecurity);
    READ_NODE_FIELD(cteList);
    READ_NODE_FIELD(rtable);
    READ_NODE_FIELD(jointree);
    READ_NODE_FIELD(targetList);
    READ_ENUM_FIELD(override, OverridingKind);
    READ_NODE_FIELD(onConflict);
    READ_NODE_FIELD(returningList);
    READ_NODE_FIELD(groupClause);
    READ_NODE_FIELD(groupingSets);
    READ_NODE_FIELD(havingQual);
    READ_NODE_FIELD(windowClause);
    READ_NODE_FIELD(distinctClause);
    READ_NODE_FIELD(sortClause);
    READ_NODE_FIELD(limitOffset);
    READ_NODE_FIELD(limitCount);
    READ_ENUM_FIELD(limitOption, LimitOption);
    READ_NODE_FIELD(rowMarks);
    READ_NODE_FIELD(setOperations);
    READ_NODE_FIELD(constraintDeps);
    READ_NODE_FIELD(withCheckOptions);
    READ_LOCATION_FIELD(stmt_location);
    READ_LOCATION_FIELD(stmt_len);

    READ_DONE();
}

/*
 * _readNotifyStmt
 */
static NotifyStmt *
_readNotifyStmt(void)
{
    READ_LOCALS(NotifyStmt);

    READ_STRING_FIELD(conditionname);
    READ_STRING_FIELD(payload);

    READ_DONE();
}

/*
 * _readDeclareCursorStmt
 */
static DeclareCursorStmt *
_readDeclareCursorStmt(void)
{
    READ_LOCALS(DeclareCursorStmt);

    READ_STRING_FIELD(portalname);
    READ_INT_FIELD(options);
    READ_NODE_FIELD(query);

    READ_DONE();
}

/*
 * _readWithCheckOption
 */
static WithCheckOption *
_readWithCheckOption(void)
{
    READ_LOCALS(WithCheckOption);

    READ_ENUM_FIELD(kind, WCOKind);
    READ_STRING_FIELD(relname);
    READ_STRING_FIELD(polname);
    READ_NODE_FIELD(qual);
    READ_BOOL_FIELD(cascaded);

    READ_DONE();
}

/*
 * _readSortGroupClause
 */
static SortGroupClause *
_readSortGroupClause(void)
{
    READ_LOCALS(SortGroupClause);

    READ_UINT_FIELD(tleSortGroupRef);
    READ_OID_FIELD(eqop);
    READ_OID_FIELD(sortop);
    READ_BOOL_FIELD(nulls_first);
    READ_BOOL_FIELD(hashable);

    READ_DONE();
}

/*
 * _readGroupingSet
 */
static GroupingSet *
_readGroupingSet(void)
{
    READ_LOCALS(GroupingSet);

    READ_ENUM_FIELD(kind, GroupingSetKind);
    READ_NODE_FIELD(content);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readWindowClause
 */
static WindowClause *
_readWindowClause(void)
{
    READ_LOCALS(WindowClause);

    READ_STRING_FIELD(name);
    READ_STRING_FIELD(refname);
    READ_NODE_FIELD(partitionClause);
    READ_NODE_FIELD(orderClause);
    READ_INT_FIELD(frameOptions);
    READ_NODE_FIELD(startOffset);
    READ_NODE_FIELD(endOffset);
    READ_OID_FIELD(startInRangeFunc);
    READ_OID_FIELD(endInRangeFunc);
    READ_OID_FIELD(inRangeColl);
    READ_BOOL_FIELD(inRangeAsc);
    READ_BOOL_FIELD(inRangeNullsFirst);
    READ_UINT_FIELD(winref);
    READ_BOOL_FIELD(copiedOrder);

    READ_DONE();
}

/*
 * _readRowMarkClause
 */
static RowMarkClause *
_readRowMarkClause(void)
{
    READ_LOCALS(RowMarkClause);

    READ_UINT_FIELD(rti);
    READ_ENUM_FIELD(strength, LockClauseStrength);
    READ_ENUM_FIELD(waitPolicy, LockWaitPolicy);
    READ_BOOL_FIELD(pushedDown);

    READ_DONE();
}

/*
 * _readCommonTableExpr
 */
static CommonTableExpr *
_readCommonTableExpr(void)
{
    READ_LOCALS(CommonTableExpr);

    READ_STRING_FIELD(ctename);
    READ_NODE_FIELD(aliascolnames);
    READ_ENUM_FIELD(ctematerialized, CTEMaterialize);
    READ_NODE_FIELD(ctequery);
    READ_LOCATION_FIELD(location);
    READ_BOOL_FIELD(cterecursive);
    READ_INT_FIELD(cterefcount);
    READ_NODE_FIELD(ctecolnames);
    READ_NODE_FIELD(ctecoltypes);
    READ_NODE_FIELD(ctecoltypmods);
    READ_NODE_FIELD(ctecolcollations);

    READ_DONE();
}

/*
 * _readSetOperationStmt
 */
static SetOperationStmt *
_readSetOperationStmt(void)
{
    READ_LOCALS(SetOperationStmt);

    READ_ENUM_FIELD(op, SetOperation);
    READ_BOOL_FIELD(all);
    READ_NODE_FIELD(larg);
    READ_NODE_FIELD(rarg);
    READ_NODE_FIELD(colTypes);
    READ_NODE_FIELD(colTypmods);
    READ_NODE_FIELD(colCollations);
    READ_NODE_FIELD(groupClauses);

    READ_DONE();
}


/*
 *  Stuff from primnodes.h.
 */

static Alias *
_readAlias(void)
{
    READ_LOCALS(Alias);

    READ_STRING_FIELD(aliasname);
    READ_NODE_FIELD(colnames);

    READ_DONE();
}

static RangeVar *
_readRangeVar(void)
{
    READ_LOCALS(RangeVar);

    local_node->catalogname = NULL; /* not currently saved in output format */

    READ_STRING_FIELD(schemaname);
    READ_STRING_FIELD(relname);
    READ_BOOL_FIELD(inh);
    READ_CHAR_FIELD(relpersistence);
    READ_NODE_FIELD(alias);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readTableFunc
 */
static TableFunc *
_readTableFunc(void)
{
    READ_LOCALS(TableFunc);

    READ_NODE_FIELD(ns_uris);
    READ_NODE_FIELD(ns_names);
    READ_NODE_FIELD(docexpr);
    READ_NODE_FIELD(rowexpr);
    READ_NODE_FIELD(colnames);
    READ_NODE_FIELD(coltypes);
    READ_NODE_FIELD(coltypmods);
    READ_NODE_FIELD(colcollations);
    READ_NODE_FIELD(colexprs);
    READ_NODE_FIELD(coldefexprs);
    READ_BITMAPSET_FIELD(notnulls);
    READ_INT_FIELD(ordinalitycol);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

static IntoClause *
_readIntoClause(void)
{
    READ_LOCALS(IntoClause);

    READ_NODE_FIELD(rel);
    READ_NODE_FIELD(colNames);
    READ_STRING_FIELD(accessMethod);
    READ_NODE_FIELD(options);
    READ_ENUM_FIELD(onCommit, OnCommitAction);
    READ_STRING_FIELD(tableSpaceName);
    READ_NODE_FIELD(viewQuery);
    READ_BOOL_FIELD(skipData);

    READ_DONE();
}

/*
 * _readVar
 */
static Var *
_readVar(void)
{
    READ_LOCALS(Var);

    READ_UINT_FIELD(varno);
    READ_INT_FIELD(varattno);
    READ_OID_FIELD(vartype);
    READ_INT_FIELD(vartypmod);
    READ_OID_FIELD(varcollid);
    READ_UINT_FIELD(varlevelsup);
    READ_UINT_FIELD(varnosyn);
    READ_INT_FIELD(varattnosyn);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readConst
 */
static Const *
_readConst(void)
{
    READ_LOCALS(Const);

    READ_OID_FIELD(consttype);
    READ_INT_FIELD(consttypmod);
    READ_OID_FIELD(constcollid);
    READ_INT_FIELD(constlen);
    READ_BOOL_FIELD(constbyval);
    READ_BOOL_FIELD(constisnull);
    READ_LOCATION_FIELD(location);

    token = pg_strtok(&length); /* skip :constvalue */
    if (local_node->constisnull)
        token = pg_strtok(&length); /* skip "<>" */
    else
        local_node->constvalue = readDatum(local_node->constbyval);

    READ_DONE();
}

/*
 * _readParam
 */
static Param *
_readParam(void)
{
    READ_LOCALS(Param);

    READ_ENUM_FIELD(paramkind, ParamKind);
    READ_INT_FIELD(paramid);
    READ_OID_FIELD(paramtype);
    READ_INT_FIELD(paramtypmod);
    READ_OID_FIELD(paramcollid);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readAggref
 */
static Aggref *
_readAggref(void)
{
    READ_LOCALS(Aggref);

    READ_OID_FIELD(aggfnoid);
    READ_OID_FIELD(aggtype);
    READ_OID_FIELD(aggcollid);
    READ_OID_FIELD(inputcollid);
    READ_OID_FIELD(aggtranstype);
    READ_NODE_FIELD(aggargtypes);
    READ_NODE_FIELD(aggdirectargs);
    READ_NODE_FIELD(args);
    READ_NODE_FIELD(aggorder);
    READ_NODE_FIELD(aggdistinct);
    READ_NODE_FIELD(aggfilter);
    READ_BOOL_FIELD(aggstar);
    READ_BOOL_FIELD(aggvariadic);
    READ_CHAR_FIELD(aggkind);
    READ_UINT_FIELD(agglevelsup);
    READ_ENUM_FIELD(aggsplit, AggSplit);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readGroupingFunc
 */
static GroupingFunc *
_readGroupingFunc(void)
{
    READ_LOCALS(GroupingFunc);

    READ_NODE_FIELD(args);
    READ_NODE_FIELD(refs);
    READ_NODE_FIELD(cols);
    READ_UINT_FIELD(agglevelsup);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readWindowFunc
 */
static WindowFunc *
_readWindowFunc(void)
{
    READ_LOCALS(WindowFunc);

    READ_OID_FIELD(winfnoid);
    READ_OID_FIELD(wintype);
    READ_OID_FIELD(wincollid);
    READ_OID_FIELD(inputcollid);
    READ_NODE_FIELD(args);
    READ_NODE_FIELD(aggfilter);
    READ_UINT_FIELD(winref);
    READ_BOOL_FIELD(winstar);
    READ_BOOL_FIELD(winagg);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readSubscriptingRef
 */
static SubscriptingRef *
_readSubscriptingRef(void)
{
    READ_LOCALS(SubscriptingRef);

    READ_OID_FIELD(refcontainertype);
    READ_OID_FIELD(refelemtype);
    READ_INT_FIELD(reftypmod);
    READ_OID_FIELD(refcollid);
    READ_NODE_FIELD(refupperindexpr);
    READ_NODE_FIELD(reflowerindexpr);
    READ_NODE_FIELD(refexpr);
    READ_NODE_FIELD(refassgnexpr);

    READ_DONE();
}

/*
 * _readFuncExpr
 */
static FuncExpr *
_readFuncExpr(void)
{
    READ_LOCALS(FuncExpr);

    READ_OID_FIELD(funcid);
    READ_OID_FIELD(funcresulttype);
    READ_BOOL_FIELD(funcretset);
    READ_BOOL_FIELD(funcvariadic);
    READ_ENUM_FIELD(funcformat, CoercionForm);
    READ_OID_FIELD(funccollid);
    READ_OID_FIELD(inputcollid);
    READ_NODE_FIELD(args);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readNamedArgExpr
 */
static NamedArgExpr *
_readNamedArgExpr(void)
{
    READ_LOCALS(NamedArgExpr);

    READ_NODE_FIELD(arg);
    READ_STRING_FIELD(name);
    READ_INT_FIELD(argnumber);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readOpExpr
 */
static OpExpr *
_readOpExpr(void)
{
    READ_LOCALS(OpExpr);

    READ_OID_FIELD(opno);
    READ_OID_FIELD(opfuncid);
    READ_OID_FIELD(opresulttype);
    READ_BOOL_FIELD(opretset);
    READ_OID_FIELD(opcollid);
    READ_OID_FIELD(inputcollid);
    READ_NODE_FIELD(args);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readDistinctExpr
 */
static DistinctExpr *
_readDistinctExpr(void)
{
    READ_LOCALS(DistinctExpr);

    READ_OID_FIELD(opno);
    READ_OID_FIELD(opfuncid);
    READ_OID_FIELD(opresulttype);
    READ_BOOL_FIELD(opretset);
    READ_OID_FIELD(opcollid);
    READ_OID_FIELD(inputcollid);
    READ_NODE_FIELD(args);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readNullIfExpr
 */
static NullIfExpr *
_readNullIfExpr(void)
{
    READ_LOCALS(NullIfExpr);

    READ_OID_FIELD(opno);
    READ_OID_FIELD(opfuncid);
    READ_OID_FIELD(opresulttype);
    READ_BOOL_FIELD(opretset);
    READ_OID_FIELD(opcollid);
    READ_OID_FIELD(inputcollid);
    READ_NODE_FIELD(args);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readScalarArrayOpExpr
 */
static ScalarArrayOpExpr *
_readScalarArrayOpExpr(void)
{
    READ_LOCALS(ScalarArrayOpExpr);

    READ_OID_FIELD(opno);
    READ_OID_FIELD(opfuncid);
    READ_BOOL_FIELD(useOr);
    READ_OID_FIELD(inputcollid);
    READ_NODE_FIELD(args);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readBoolExpr
 */
static BoolExpr *
_readBoolExpr(void)
{
    READ_LOCALS(BoolExpr);

    /* do-it-yourself enum representation */
    token = pg_strtok(&length); /* skip :boolop */
    token = pg_strtok(&length); /* get field value */
    if (strncmp(token, "and", 3) == 0)
        local_node->boolop = AND_EXPR;
    else if (strncmp(token, "or", 2) == 0)
        local_node->boolop = OR_EXPR;
    else if (strncmp(token, "not", 3) == 0)
        local_node->boolop = NOT_EXPR;
    else
        elog(ERROR, "unrecognized boolop \"%.*s\"", length, token);

    READ_NODE_FIELD(args);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readSubLink
 */
static SubLink *
_readSubLink(void)
{
    READ_LOCALS(SubLink);

    READ_ENUM_FIELD(subLinkType, SubLinkType);
    READ_INT_FIELD(subLinkId);
    READ_NODE_FIELD(testexpr);
    READ_NODE_FIELD(operName);
    READ_NODE_FIELD(subselect);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readSubPlan is not needed since it doesn't appear in stored rules.
 */

/*
 * _readFieldSelect
 */
static FieldSelect *
_readFieldSelect(void)
{
    READ_LOCALS(FieldSelect);

    READ_NODE_FIELD(arg);
    READ_INT_FIELD(fieldnum);
    READ_OID_FIELD(resulttype);
    READ_INT_FIELD(resulttypmod);
    READ_OID_FIELD(resultcollid);

    READ_DONE();
}

/*
 * _readFieldStore
 */
static FieldStore *
_readFieldStore(void)
{
    READ_LOCALS(FieldStore);

    READ_NODE_FIELD(arg);
    READ_NODE_FIELD(newvals);
    READ_NODE_FIELD(fieldnums);
    READ_OID_FIELD(resulttype);

    READ_DONE();
}

/*
 * _readRelabelType
 */
static RelabelType *
_readRelabelType(void)
{
    READ_LOCALS(RelabelType);

    READ_NODE_FIELD(arg);
    READ_OID_FIELD(resulttype);
    READ_INT_FIELD(resulttypmod);
    READ_OID_FIELD(resultcollid);
    READ_ENUM_FIELD(relabelformat, CoercionForm);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readCoerceViaIO
 */
static CoerceViaIO *
_readCoerceViaIO(void)
{
    READ_LOCALS(CoerceViaIO);

    READ_NODE_FIELD(arg);
    READ_OID_FIELD(resulttype);
    READ_OID_FIELD(resultcollid);
    READ_ENUM_FIELD(coerceformat, CoercionForm);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readArrayCoerceExpr
 */
static ArrayCoerceExpr *
_readArrayCoerceExpr(void)
{
    READ_LOCALS(ArrayCoerceExpr);

    READ_NODE_FIELD(arg);
    READ_NODE_FIELD(elemexpr);
    READ_OID_FIELD(resulttype);
    READ_INT_FIELD(resulttypmod);
    READ_OID_FIELD(resultcollid);
    READ_ENUM_FIELD(coerceformat, CoercionForm);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readConvertRowtypeExpr
 */
static ConvertRowtypeExpr *
_readConvertRowtypeExpr(void)
{
    READ_LOCALS(ConvertRowtypeExpr);

    READ_NODE_FIELD(arg);
    READ_OID_FIELD(resulttype);
    READ_ENUM_FIELD(convertformat, CoercionForm);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readCollateExpr
 */
static CollateExpr *
_readCollateExpr(void)
{
    READ_LOCALS(CollateExpr);

    READ_NODE_FIELD(arg);
    READ_OID_FIELD(collOid);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readCaseExpr
 */
static CaseExpr *
_readCaseExpr(void)
{
    READ_LOCALS(CaseExpr);

    READ_OID_FIELD(casetype);
    READ_OID_FIELD(casecollid);
    READ_NODE_FIELD(arg);
    READ_NODE_FIELD(args);
    READ_NODE_FIELD(defresult);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readCaseWhen
 */
static CaseWhen *
_readCaseWhen(void)
{
    READ_LOCALS(CaseWhen);

    READ_NODE_FIELD(expr);
    READ_NODE_FIELD(result);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readCaseTestExpr
 */
static CaseTestExpr *
_readCaseTestExpr(void)
{
    READ_LOCALS(CaseTestExpr);

    READ_OID_FIELD(typeId);
    READ_INT_FIELD(typeMod);
    READ_OID_FIELD(collation);

    READ_DONE();
}

/*
 * _readArrayExpr
 */
static ArrayExpr *
_readArrayExpr(void)
{
    READ_LOCALS(ArrayExpr);

    READ_OID_FIELD(array_typeid);
    READ_OID_FIELD(array_collid);
    READ_OID_FIELD(element_typeid);
    READ_NODE_FIELD(elements);
    READ_BOOL_FIELD(multidims);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readRowExpr
 */
static RowExpr *
_readRowExpr(void)
{
    READ_LOCALS(RowExpr);

    READ_NODE_FIELD(args);
    READ_OID_FIELD(row_typeid);
    READ_ENUM_FIELD(row_format, CoercionForm);
    READ_NODE_FIELD(colnames);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readRowCompareExpr
 */
static RowCompareExpr *
_readRowCompareExpr(void)
{
    READ_LOCALS(RowCompareExpr);

    READ_ENUM_FIELD(rctype, RowCompareType);
    READ_NODE_FIELD(opnos);
    READ_NODE_FIELD(opfamilies);
    READ_NODE_FIELD(inputcollids);
    READ_NODE_FIELD(largs);
    READ_NODE_FIELD(rargs);

    READ_DONE();
}

/*
 * _readCoalesceExpr
 */
static CoalesceExpr *
_readCoalesceExpr(void)
{
    READ_LOCALS(CoalesceExpr);

    READ_OID_FIELD(coalescetype);
    READ_OID_FIELD(coalescecollid);
    READ_NODE_FIELD(args);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readMinMaxExpr
 */
static MinMaxExpr *
_readMinMaxExpr(void)
{
    READ_LOCALS(MinMaxExpr);

    READ_OID_FIELD(minmaxtype);
    READ_OID_FIELD(minmaxcollid);
    READ_OID_FIELD(inputcollid);
    READ_ENUM_FIELD(op, MinMaxOp);
    READ_NODE_FIELD(args);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readSQLValueFunction
 */
static SQLValueFunction *
_readSQLValueFunction(void)
{
    READ_LOCALS(SQLValueFunction);

    READ_ENUM_FIELD(op, SQLValueFunctionOp);
    READ_OID_FIELD(type);
    READ_INT_FIELD(typmod);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readXmlExpr
 */
static XmlExpr *
_readXmlExpr(void)
{
    READ_LOCALS(XmlExpr);

    READ_ENUM_FIELD(op, XmlExprOp);
    READ_STRING_FIELD(name);
    READ_NODE_FIELD(named_args);
    READ_NODE_FIELD(arg_names);
    READ_NODE_FIELD(args);
    READ_ENUM_FIELD(xmloption, XmlOptionType);
    READ_OID_FIELD(type);
    READ_INT_FIELD(typmod);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readNullTest
 */
static NullTest *
_readNullTest(void)
{
    READ_LOCALS(NullTest);

    READ_NODE_FIELD(arg);
    READ_ENUM_FIELD(nulltesttype, NullTestType);
    READ_BOOL_FIELD(argisrow);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readBooleanTest
 */
static BooleanTest *
_readBooleanTest(void)
{
    READ_LOCALS(BooleanTest);

    READ_NODE_FIELD(arg);
    READ_ENUM_FIELD(booltesttype, BoolTestType);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readCoerceToDomain
 */
static CoerceToDomain *
_readCoerceToDomain(void)
{
    READ_LOCALS(CoerceToDomain);

    READ_NODE_FIELD(arg);
    READ_OID_FIELD(resulttype);
    READ_INT_FIELD(resulttypmod);
    READ_OID_FIELD(resultcollid);
    READ_ENUM_FIELD(coercionformat, CoercionForm);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readCoerceToDomainValue
 */
static CoerceToDomainValue *
_readCoerceToDomainValue(void)
{
    READ_LOCALS(CoerceToDomainValue);

    READ_OID_FIELD(typeId);
    READ_INT_FIELD(typeMod);
    READ_OID_FIELD(collation);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readSetToDefault
 */
static SetToDefault *
_readSetToDefault(void)
{
    READ_LOCALS(SetToDefault);

    READ_OID_FIELD(typeId);
    READ_INT_FIELD(typeMod);
    READ_OID_FIELD(collation);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readCurrentOfExpr
 */
static CurrentOfExpr *
_readCurrentOfExpr(void)
{
    READ_LOCALS(CurrentOfExpr);

    READ_UINT_FIELD(cvarno);
    READ_STRING_FIELD(cursor_name);
    READ_INT_FIELD(cursor_param);

    READ_DONE();
}

/*
 * _readNextValueExpr
 */
static NextValueExpr *
_readNextValueExpr(void)
{
    READ_LOCALS(NextValueExpr);

    READ_OID_FIELD(seqid);
    READ_OID_FIELD(typeId);

    READ_DONE();
}

/*
 * _readInferenceElem
 */
static InferenceElem *
_readInferenceElem(void)
{
    READ_LOCALS(InferenceElem);

    READ_NODE_FIELD(expr);
    READ_OID_FIELD(infercollid);
    READ_OID_FIELD(inferopclass);

    READ_DONE();
}

/*
 * _readTargetEntry
 */
static TargetEntry *
_readTargetEntry(void)
{
    READ_LOCALS(TargetEntry);

    READ_NODE_FIELD(expr);
    READ_INT_FIELD(resno);
    READ_STRING_FIELD(resname);
    READ_UINT_FIELD(ressortgroupref);
    READ_OID_FIELD(resorigtbl);
    READ_INT_FIELD(resorigcol);
    READ_BOOL_FIELD(resjunk);

    READ_DONE();
}

/*
 * _readRangeTblRef
 */
static RangeTblRef *
_readRangeTblRef(void)
{
    READ_LOCALS(RangeTblRef);

    READ_INT_FIELD(rtindex);

    READ_DONE();
}

/*
 * _readJoinExpr
 */
static JoinExpr *
_readJoinExpr(void)
{
    READ_LOCALS(JoinExpr);

    READ_ENUM_FIELD(jointype, JoinType);
    READ_BOOL_FIELD(isNatural);
    READ_NODE_FIELD(larg);
    READ_NODE_FIELD(rarg);
    READ_NODE_FIELD(usingClause);
    READ_NODE_FIELD(quals);
    READ_NODE_FIELD(alias);
    READ_INT_FIELD(rtindex);

    READ_DONE();
}

/*
 * _readFromExpr
 */
static FromExpr *
_readFromExpr(void)
{
    READ_LOCALS(FromExpr);

    READ_NODE_FIELD(fromlist);
    READ_NODE_FIELD(quals);

    READ_DONE();
}

/*
 * _readOnConflictExpr
 */
static OnConflictExpr *
_readOnConflictExpr(void)
{
    READ_LOCALS(OnConflictExpr);

    READ_ENUM_FIELD(action, OnConflictAction);
    READ_NODE_FIELD(arbiterElems);
    READ_NODE_FIELD(arbiterWhere);
    READ_OID_FIELD(constraint);
    READ_NODE_FIELD(onConflictSet);
    READ_NODE_FIELD(onConflictWhere);
    READ_INT_FIELD(exclRelIndex);
    READ_NODE_FIELD(exclRelTlist);

    READ_DONE();
}

/*
 *  Stuff from pathnodes.h.
 *
 * Mostly we don't need to read planner nodes back in again, but some
 * of these also end up in plan trees.
 */

/*
 * _readAppendRelInfo
 */
static AppendRelInfo *
_readAppendRelInfo(void)
{
    READ_LOCALS(AppendRelInfo);

    READ_UINT_FIELD(parent_relid);
    READ_UINT_FIELD(child_relid);
    READ_OID_FIELD(parent_reltype);
    READ_OID_FIELD(child_reltype);
    READ_NODE_FIELD(translated_vars);
    READ_INT_FIELD(num_child_cols);
    READ_ATTRNUMBER_ARRAY(parent_colnos, local_node->num_child_cols);
    READ_OID_FIELD(parent_reloid);

    READ_DONE();
}

/*
 *  Stuff from parsenodes.h.
 */

/*
 * _readRangeTblEntry
 */
static RangeTblEntry *
_readRangeTblEntry(void)
{
    READ_LOCALS(RangeTblEntry);

    /* put alias + eref first to make dump more legible */
    READ_NODE_FIELD(alias);
    READ_NODE_FIELD(eref);
    READ_ENUM_FIELD(rtekind, RTEKind);

    switch (local_node->rtekind)
    {
        case RTE_RELATION:
            READ_OID_FIELD(relid);
            READ_CHAR_FIELD(relkind);
            READ_INT_FIELD(rellockmode);
            READ_NODE_FIELD(tablesample);
            break;
        case RTE_SUBQUERY:
            READ_NODE_FIELD(subquery);
            READ_BOOL_FIELD(security_barrier);
            break;
        case RTE_JOIN:
            READ_ENUM_FIELD(jointype, JoinType);
            READ_INT_FIELD(joinmergedcols);
            READ_NODE_FIELD(joinaliasvars);
            READ_NODE_FIELD(joinleftcols);
            READ_NODE_FIELD(joinrightcols);
            break;
        case RTE_FUNCTION:
            READ_NODE_FIELD(functions);
            READ_BOOL_FIELD(funcordinality);
            break;
        case RTE_TABLEFUNC:
            READ_NODE_FIELD(tablefunc);
            /* The RTE must have a copy of the column type info, if any */
            if (local_node->tablefunc)
            {
                TableFunc  *tf = local_node->tablefunc;

                local_node->coltypes = tf->coltypes;
                local_node->coltypmods = tf->coltypmods;
                local_node->colcollations = tf->colcollations;
            }
            break;
        case RTE_VALUES:
            READ_NODE_FIELD(values_lists);
            READ_NODE_FIELD(coltypes);
            READ_NODE_FIELD(coltypmods);
            READ_NODE_FIELD(colcollations);
            break;
        case RTE_CTE:
            READ_STRING_FIELD(ctename);
            READ_UINT_FIELD(ctelevelsup);
            READ_BOOL_FIELD(self_reference);
            READ_NODE_FIELD(coltypes);
            READ_NODE_FIELD(coltypmods);
            READ_NODE_FIELD(colcollations);
            break;
        case RTE_NAMEDTUPLESTORE:
            READ_STRING_FIELD(enrname);
            READ_FLOAT_FIELD(enrtuples);
            READ_OID_FIELD(relid);
            READ_NODE_FIELD(coltypes);
            READ_NODE_FIELD(coltypmods);
            READ_NODE_FIELD(colcollations);
            break;
        case RTE_RESULT:
            /* no extra fields */
            break;
        default:
            elog(ERROR, "unrecognized RTE kind: %d",
                 (int) local_node->rtekind);
            break;
    }

    READ_BOOL_FIELD(lateral);
    READ_BOOL_FIELD(inh);
    READ_BOOL_FIELD(inFromCl);
    READ_UINT_FIELD(requiredPerms);
    READ_OID_FIELD(checkAsUser);
    READ_BITMAPSET_FIELD(selectedCols);
    READ_BITMAPSET_FIELD(insertedCols);
    READ_BITMAPSET_FIELD(updatedCols);
    READ_BITMAPSET_FIELD(extraUpdatedCols);
    READ_NODE_FIELD(securityQuals);

    READ_DONE();
}

/*
 * _readRangeTblFunction
 */
static RangeTblFunction *
_readRangeTblFunction(void)
{
    READ_LOCALS(RangeTblFunction);

    READ_NODE_FIELD(funcexpr);
    READ_INT_FIELD(funccolcount);
    READ_NODE_FIELD(funccolnames);
    READ_NODE_FIELD(funccoltypes);
    READ_NODE_FIELD(funccoltypmods);
    READ_NODE_FIELD(funccolcollations);
    READ_BITMAPSET_FIELD(funcparams);

    READ_DONE();
}

/*
 * _readTableSampleClause
 */
static TableSampleClause *
_readTableSampleClause(void)
{
    READ_LOCALS(TableSampleClause);

    READ_OID_FIELD(tsmhandler);
    READ_NODE_FIELD(args);
    READ_NODE_FIELD(repeatable);

    READ_DONE();
}

/*
 * _readDefElem
 */
static DefElem *
_readDefElem(void)
{
    READ_LOCALS(DefElem);

    READ_STRING_FIELD(defnamespace);
    READ_STRING_FIELD(defname);
    READ_NODE_FIELD(arg);
    READ_ENUM_FIELD(defaction, DefElemAction);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 *  Stuff from plannodes.h.
 */

/*
 * _readPlannedStmt
 */
static PlannedStmt *
_readPlannedStmt(void)
{
    READ_LOCALS(PlannedStmt);

    READ_ENUM_FIELD(commandType, CmdType);
    READ_UINT64_FIELD(queryId);
    READ_BOOL_FIELD(hasReturning);
    READ_BOOL_FIELD(hasModifyingCTE);
    READ_BOOL_FIELD(canSetTag);
    READ_BOOL_FIELD(transientPlan);
    READ_BOOL_FIELD(dependsOnRole);
    READ_BOOL_FIELD(parallelModeNeeded);
    READ_INT_FIELD(jitFlags);
    READ_NODE_FIELD(planTree);
    READ_NODE_FIELD(rtable);
    READ_NODE_FIELD(resultRelations);
    READ_NODE_FIELD(rootResultRelations);
    READ_NODE_FIELD(appendRelations);
    READ_NODE_FIELD(subplans);
    READ_BITMAPSET_FIELD(rewindPlanIDs);
    READ_NODE_FIELD(rowMarks);
    READ_NODE_FIELD(relationOids);
    READ_NODE_FIELD(invalItems);
    READ_NODE_FIELD(paramExecTypes);
    READ_NODE_FIELD(utilityStmt);
    READ_LOCATION_FIELD(stmt_location);
    READ_LOCATION_FIELD(stmt_len);

    READ_DONE();
}

/*
 * ReadCommonPlan
 *  Assign the basic stuff of all nodes that inherit from Plan
 */
static void
ReadCommonPlan(Plan *local_node)
{
    READ_TEMP_LOCALS();

    READ_FLOAT_FIELD(startup_cost);
    READ_FLOAT_FIELD(total_cost);
    READ_FLOAT_FIELD(plan_rows);
    READ_INT_FIELD(plan_width);
    READ_BOOL_FIELD(parallel_aware);
    READ_BOOL_FIELD(parallel_safe);
    READ_INT_FIELD(plan_node_id);
    READ_NODE_FIELD(targetlist);
    READ_NODE_FIELD(qual);
    READ_NODE_FIELD(lefttree);
    READ_NODE_FIELD(righttree);
    READ_NODE_FIELD(initPlan);
    READ_BITMAPSET_FIELD(extParam);
    READ_BITMAPSET_FIELD(allParam);
}

/*
 * _readPlan
 */
static Plan *
_readPlan(void)
{
    READ_LOCALS_NO_FIELDS(Plan);

    ReadCommonPlan(local_node);

    READ_DONE();
}

/*
 * _readResult
 */
static Result *
_readResult(void)
{
    READ_LOCALS(Result);

    ReadCommonPlan(&local_node->plan);

    READ_NODE_FIELD(resconstantqual);

    READ_DONE();
}

/*
 * _readProjectSet
 */
static ProjectSet *
_readProjectSet(void)
{
    READ_LOCALS_NO_FIELDS(ProjectSet);

    ReadCommonPlan(&local_node->plan);

    READ_DONE();
}

/*
 * _readModifyTable
 */
static ModifyTable *
_readModifyTable(void)
{
    READ_LOCALS(ModifyTable);

    ReadCommonPlan(&local_node->plan);

    READ_ENUM_FIELD(operation, CmdType);
    READ_BOOL_FIELD(canSetTag);
    READ_UINT_FIELD(nominalRelation);
    READ_UINT_FIELD(rootRelation);
    READ_BOOL_FIELD(partColsUpdated);
    READ_NODE_FIELD(resultRelations);
    READ_INT_FIELD(resultRelIndex);
    READ_INT_FIELD(rootResultRelIndex);
    READ_NODE_FIELD(plans);
    READ_NODE_FIELD(withCheckOptionLists);
    READ_NODE_FIELD(returningLists);
    READ_NODE_FIELD(fdwPrivLists);
    READ_BITMAPSET_FIELD(fdwDirectModifyPlans);
    READ_NODE_FIELD(rowMarks);
    READ_INT_FIELD(epqParam);
    READ_ENUM_FIELD(onConflictAction, OnConflictAction);
    READ_NODE_FIELD(arbiterIndexes);
    READ_NODE_FIELD(onConflictSet);
    READ_NODE_FIELD(onConflictWhere);
    READ_UINT_FIELD(exclRelRTI);
    READ_NODE_FIELD(exclRelTlist);

    READ_DONE();
}

/*
 * _readAppend
 */
static Append *
_readAppend(void)
{
    READ_LOCALS(Append);

    ReadCommonPlan(&local_node->plan);

    READ_BITMAPSET_FIELD(apprelids);
    READ_NODE_FIELD(appendplans);
    READ_INT_FIELD(first_partial_plan);
    READ_NODE_FIELD(part_prune_info);

    READ_DONE();
}

/*
 * _readMergeAppend
 */
static MergeAppend *
_readMergeAppend(void)
{
    READ_LOCALS(MergeAppend);

    ReadCommonPlan(&local_node->plan);

    READ_BITMAPSET_FIELD(apprelids);
    READ_NODE_FIELD(mergeplans);
    READ_INT_FIELD(numCols);
    READ_ATTRNUMBER_ARRAY(sortColIdx, local_node->numCols);
    READ_OID_ARRAY(sortOperators, local_node->numCols);
    READ_OID_ARRAY(collations, local_node->numCols);
    READ_BOOL_ARRAY(nullsFirst, local_node->numCols);
    READ_NODE_FIELD(part_prune_info);

    READ_DONE();
}

/*
 * _readRecursiveUnion
 */
static RecursiveUnion *
_readRecursiveUnion(void)
{
    READ_LOCALS(RecursiveUnion);

    ReadCommonPlan(&local_node->plan);

    READ_INT_FIELD(wtParam);
    READ_INT_FIELD(numCols);
    READ_ATTRNUMBER_ARRAY(dupColIdx, local_node->numCols);
    READ_OID_ARRAY(dupOperators, local_node->numCols);
    READ_OID_ARRAY(dupCollations, local_node->numCols);
    READ_LONG_FIELD(numGroups);

    READ_DONE();
}

/*
 * _readBitmapAnd
 */
static BitmapAnd *
_readBitmapAnd(void)
{
    READ_LOCALS(BitmapAnd);

    ReadCommonPlan(&local_node->plan);

    READ_NODE_FIELD(bitmapplans);

    READ_DONE();
}

/*
 * _readBitmapOr
 */
static BitmapOr *
_readBitmapOr(void)
{
    READ_LOCALS(BitmapOr);

    ReadCommonPlan(&local_node->plan);

    READ_BOOL_FIELD(isshared);
    READ_NODE_FIELD(bitmapplans);

    READ_DONE();
}

/*
 * ReadCommonScan
 *  Assign the basic stuff of all nodes that inherit from Scan
 */
static void
ReadCommonScan(Scan *local_node)
{
    READ_TEMP_LOCALS();

    ReadCommonPlan(&local_node->plan);

    READ_UINT_FIELD(scanrelid);
}

/*
 * _readScan
 */
static Scan *
_readScan(void)
{
    READ_LOCALS_NO_FIELDS(Scan);

    ReadCommonScan(local_node);

    READ_DONE();
}

/*
 * _readSeqScan
 */
static SeqScan *
_readSeqScan(void)
{
    READ_LOCALS_NO_FIELDS(SeqScan);

    ReadCommonScan(local_node);

    READ_DONE();
}

/*
 * _readSampleScan
 */
static SampleScan *
_readSampleScan(void)
{
    READ_LOCALS(SampleScan);

    ReadCommonScan(&local_node->scan);

    READ_NODE_FIELD(tablesample);

    READ_DONE();
}

/*
 * _readIndexScan
 */
static IndexScan *
_readIndexScan(void)
{
    READ_LOCALS(IndexScan);

    ReadCommonScan(&local_node->scan);

    READ_OID_FIELD(indexid);
    READ_NODE_FIELD(indexqual);
    READ_NODE_FIELD(indexqualorig);
    READ_NODE_FIELD(indexorderby);
    READ_NODE_FIELD(indexorderbyorig);
    READ_NODE_FIELD(indexorderbyops);
    READ_ENUM_FIELD(indexorderdir, ScanDirection);

    READ_DONE();
}

/*
 * _readIndexOnlyScan
 */
static IndexOnlyScan *
_readIndexOnlyScan(void)
{
    READ_LOCALS(IndexOnlyScan);

    ReadCommonScan(&local_node->scan);

    READ_OID_FIELD(indexid);
    READ_NODE_FIELD(indexqual);
    READ_NODE_FIELD(indexorderby);
    READ_NODE_FIELD(indextlist);
    READ_ENUM_FIELD(indexorderdir, ScanDirection);

    READ_DONE();
}

/*
 * _readBitmapIndexScan
 */
static BitmapIndexScan *
_readBitmapIndexScan(void)
{
    READ_LOCALS(BitmapIndexScan);

    ReadCommonScan(&local_node->scan);

    READ_OID_FIELD(indexid);
    READ_BOOL_FIELD(isshared);
    READ_NODE_FIELD(indexqual);
    READ_NODE_FIELD(indexqualorig);

    READ_DONE();
}

/*
 * _readBitmapHeapScan
 */
static BitmapHeapScan *
_readBitmapHeapScan(void)
{
    READ_LOCALS(BitmapHeapScan);

    ReadCommonScan(&local_node->scan);

    READ_NODE_FIELD(bitmapqualorig);

    READ_DONE();
}

/*
 * _readTidScan
 */
static TidScan *
_readTidScan(void)
{
    READ_LOCALS(TidScan);

    ReadCommonScan(&local_node->scan);

    READ_NODE_FIELD(tidquals);

    READ_DONE();
}

/*
 * _readSubqueryScan
 */
static SubqueryScan *
_readSubqueryScan(void)
{
    READ_LOCALS(SubqueryScan);

    ReadCommonScan(&local_node->scan);

    READ_NODE_FIELD(subplan);

    READ_DONE();
}

/*
 * _readFunctionScan
 */
static FunctionScan *
_readFunctionScan(void)
{
    READ_LOCALS(FunctionScan);

    ReadCommonScan(&local_node->scan);

    READ_NODE_FIELD(functions);
    READ_BOOL_FIELD(funcordinality);

    READ_DONE();
}

/*
 * _readValuesScan
 */
static ValuesScan *
_readValuesScan(void)
{
    READ_LOCALS(ValuesScan);

    ReadCommonScan(&local_node->scan);

    READ_NODE_FIELD(values_lists);

    READ_DONE();
}

/*
 * _readTableFuncScan
 */
static TableFuncScan *
_readTableFuncScan(void)
{
    READ_LOCALS(TableFuncScan);

    ReadCommonScan(&local_node->scan);

    READ_NODE_FIELD(tablefunc);

    READ_DONE();
}

/*
 * _readCteScan
 */
static CteScan *
_readCteScan(void)
{
    READ_LOCALS(CteScan);

    ReadCommonScan(&local_node->scan);

    READ_INT_FIELD(ctePlanId);
    READ_INT_FIELD(cteParam);

    READ_DONE();
}

/*
 * _readNamedTuplestoreScan
 */
static NamedTuplestoreScan *
_readNamedTuplestoreScan(void)
{
    READ_LOCALS(NamedTuplestoreScan);

    ReadCommonScan(&local_node->scan);

    READ_STRING_FIELD(enrname);

    READ_DONE();
}

/*
 * _readWorkTableScan
 */
static WorkTableScan *
_readWorkTableScan(void)
{
    READ_LOCALS(WorkTableScan);

    ReadCommonScan(&local_node->scan);

    READ_INT_FIELD(wtParam);

    READ_DONE();
}

/*
 * _readForeignScan
 */
static ForeignScan *
_readForeignScan(void)
{
    READ_LOCALS(ForeignScan);

    ReadCommonScan(&local_node->scan);

    READ_ENUM_FIELD(operation, CmdType);
    READ_OID_FIELD(fs_server);
    READ_NODE_FIELD(fdw_exprs);
    READ_NODE_FIELD(fdw_private);
    READ_NODE_FIELD(fdw_scan_tlist);
    READ_NODE_FIELD(fdw_recheck_quals);
    READ_BITMAPSET_FIELD(fs_relids);
    READ_BOOL_FIELD(fsSystemCol);

    READ_DONE();
}

/*
 * _readCustomScan
 */
static CustomScan *
_readCustomScan(void)
{
    READ_LOCALS(CustomScan);
    char       *custom_name;
    const CustomScanMethods *methods;

    ReadCommonScan(&local_node->scan);

    READ_UINT_FIELD(flags);
    READ_NODE_FIELD(custom_plans);
    READ_NODE_FIELD(custom_exprs);
    READ_NODE_FIELD(custom_private);
    READ_NODE_FIELD(custom_scan_tlist);
    READ_BITMAPSET_FIELD(custom_relids);

    /* Lookup CustomScanMethods by CustomName */
    token = pg_strtok(&length); /* skip methods: */
    token = pg_strtok(&length); /* CustomName */
    custom_name = nullable_string(token, length);
    methods = GetCustomScanMethods(custom_name, false);
    local_node->methods = methods;

    READ_DONE();
}

/*
 * ReadCommonJoin
 *  Assign the basic stuff of all nodes that inherit from Join
 */
static void
ReadCommonJoin(Join *local_node)
{
    READ_TEMP_LOCALS();

    ReadCommonPlan(&local_node->plan);

    READ_ENUM_FIELD(jointype, JoinType);
    READ_BOOL_FIELD(inner_unique);
    READ_NODE_FIELD(joinqual);
}

/*
 * _readJoin
 */
static Join *
_readJoin(void)
{
    READ_LOCALS_NO_FIELDS(Join);

    ReadCommonJoin(local_node);

    READ_DONE();
}

/*
 * _readNestLoop
 */
static NestLoop *
_readNestLoop(void)
{
    READ_LOCALS(NestLoop);

    ReadCommonJoin(&local_node->join);

    READ_NODE_FIELD(nestParams);

    READ_DONE();
}

/*
 * _readMergeJoin
 */
static MergeJoin *
_readMergeJoin(void)
{
    int         numCols;

    READ_LOCALS(MergeJoin);

    ReadCommonJoin(&local_node->join);

    READ_BOOL_FIELD(skip_mark_restore);
    READ_NODE_FIELD(mergeclauses);

    numCols = list_length(local_node->mergeclauses);

    READ_OID_ARRAY(mergeFamilies, numCols);
    READ_OID_ARRAY(mergeCollations, numCols);
    READ_INT_ARRAY(mergeStrategies, numCols);
    READ_BOOL_ARRAY(mergeNullsFirst, numCols);

    READ_DONE();
}

/*
 * _readHashJoin
 */
static HashJoin *
_readHashJoin(void)
{
    READ_LOCALS(HashJoin);

    ReadCommonJoin(&local_node->join);

    READ_NODE_FIELD(hashclauses);
    READ_NODE_FIELD(hashoperators);
    READ_NODE_FIELD(hashcollations);
    READ_NODE_FIELD(hashkeys);

    READ_DONE();
}

/*
 * _readMaterial
 */
static Material *
_readMaterial(void)
{
    READ_LOCALS_NO_FIELDS(Material);

    ReadCommonPlan(&local_node->plan);

    READ_DONE();
}

/*
 * ReadCommonSort
 *  Assign the basic stuff of all nodes that inherit from Sort
 */
static void
ReadCommonSort(Sort *local_node)
{
    READ_TEMP_LOCALS();

    ReadCommonPlan(&local_node->plan);

    READ_INT_FIELD(numCols);
    READ_ATTRNUMBER_ARRAY(sortColIdx, local_node->numCols);
    READ_OID_ARRAY(sortOperators, local_node->numCols);
    READ_OID_ARRAY(collations, local_node->numCols);
    READ_BOOL_ARRAY(nullsFirst, local_node->numCols);
}

/*
 * _readSort
 */
static Sort *
_readSort(void)
{
    READ_LOCALS_NO_FIELDS(Sort);

    ReadCommonSort(local_node);

    READ_DONE();
}

/*
 * _readIncrementalSort
 */
static IncrementalSort *
_readIncrementalSort(void)
{
    READ_LOCALS(IncrementalSort);

    ReadCommonSort(&local_node->sort);

    READ_INT_FIELD(nPresortedCols);

    READ_DONE();
}

/*
 * _readGroup
 */
static Group *
_readGroup(void)
{
    READ_LOCALS(Group);

    ReadCommonPlan(&local_node->plan);

    READ_INT_FIELD(numCols);
    READ_ATTRNUMBER_ARRAY(grpColIdx, local_node->numCols);
    READ_OID_ARRAY(grpOperators, local_node->numCols);
    READ_OID_ARRAY(grpCollations, local_node->numCols);

    READ_DONE();
}

/*
 * _readAgg
 */
static Agg *
_readAgg(void)
{
    READ_LOCALS(Agg);

    ReadCommonPlan(&local_node->plan);

    READ_ENUM_FIELD(aggstrategy, AggStrategy);
    READ_ENUM_FIELD(aggsplit, AggSplit);
    READ_INT_FIELD(numCols);
    READ_ATTRNUMBER_ARRAY(grpColIdx, local_node->numCols);
    READ_OID_ARRAY(grpOperators, local_node->numCols);
    READ_OID_ARRAY(grpCollations, local_node->numCols);
    READ_LONG_FIELD(numGroups);
    READ_UINT64_FIELD(transitionSpace);
    READ_BITMAPSET_FIELD(aggParams);
    READ_NODE_FIELD(groupingSets);
    READ_NODE_FIELD(chain);

    READ_DONE();
}

/*
 * _readWindowAgg
 */
static WindowAgg *
_readWindowAgg(void)
{
    READ_LOCALS(WindowAgg);

    ReadCommonPlan(&local_node->plan);

    READ_UINT_FIELD(winref);
    READ_INT_FIELD(partNumCols);
    READ_ATTRNUMBER_ARRAY(partColIdx, local_node->partNumCols);
    READ_OID_ARRAY(partOperators, local_node->partNumCols);
    READ_OID_ARRAY(partCollations, local_node->partNumCols);
    READ_INT_FIELD(ordNumCols);
    READ_ATTRNUMBER_ARRAY(ordColIdx, local_node->ordNumCols);
    READ_OID_ARRAY(ordOperators, local_node->ordNumCols);
    READ_OID_ARRAY(ordCollations, local_node->ordNumCols);
    READ_INT_FIELD(frameOptions);
    READ_NODE_FIELD(startOffset);
    READ_NODE_FIELD(endOffset);
    READ_OID_FIELD(startInRangeFunc);
    READ_OID_FIELD(endInRangeFunc);
    READ_OID_FIELD(inRangeColl);
    READ_BOOL_FIELD(inRangeAsc);
    READ_BOOL_FIELD(inRangeNullsFirst);

    READ_DONE();
}

/*
 * _readUnique
 */
static Unique *
_readUnique(void)
{
    READ_LOCALS(Unique);

    ReadCommonPlan(&local_node->plan);

    READ_INT_FIELD(numCols);
    READ_ATTRNUMBER_ARRAY(uniqColIdx, local_node->numCols);
    READ_OID_ARRAY(uniqOperators, local_node->numCols);
    READ_OID_ARRAY(uniqCollations, local_node->numCols);

    READ_DONE();
}

/*
 * _readGather
 */
static Gather *
_readGather(void)
{
    READ_LOCALS(Gather);

    ReadCommonPlan(&local_node->plan);

    READ_INT_FIELD(num_workers);
    READ_INT_FIELD(rescan_param);
    READ_BOOL_FIELD(single_copy);
    READ_BOOL_FIELD(invisible);
    READ_BITMAPSET_FIELD(initParam);

    READ_DONE();
}

/*
 * _readGatherMerge
 */
static GatherMerge *
_readGatherMerge(void)
{
    READ_LOCALS(GatherMerge);

    ReadCommonPlan(&local_node->plan);

    READ_INT_FIELD(num_workers);
    READ_INT_FIELD(rescan_param);
    READ_INT_FIELD(numCols);
    READ_ATTRNUMBER_ARRAY(sortColIdx, local_node->numCols);
    READ_OID_ARRAY(sortOperators, local_node->numCols);
    READ_OID_ARRAY(collations, local_node->numCols);
    READ_BOOL_ARRAY(nullsFirst, local_node->numCols);
    READ_BITMAPSET_FIELD(initParam);

    READ_DONE();
}

/*
 * _readHash
 */
static Hash *
_readHash(void)
{
    READ_LOCALS(Hash);

    ReadCommonPlan(&local_node->plan);

    READ_NODE_FIELD(hashkeys);
    READ_OID_FIELD(skewTable);
    READ_INT_FIELD(skewColumn);
    READ_BOOL_FIELD(skewInherit);
    READ_FLOAT_FIELD(rows_total);

    READ_DONE();
}

/*
 * _readSetOp
 */
static SetOp *
_readSetOp(void)
{
    READ_LOCALS(SetOp);

    ReadCommonPlan(&local_node->plan);

    READ_ENUM_FIELD(cmd, SetOpCmd);
    READ_ENUM_FIELD(strategy, SetOpStrategy);
    READ_INT_FIELD(numCols);
    READ_ATTRNUMBER_ARRAY(dupColIdx, local_node->numCols);
    READ_OID_ARRAY(dupOperators, local_node->numCols);
    READ_OID_ARRAY(dupCollations, local_node->numCols);
    READ_INT_FIELD(flagColIdx);
    READ_INT_FIELD(firstFlag);
    READ_LONG_FIELD(numGroups);

    READ_DONE();
}

/*
 * _readLockRows
 */
static LockRows *
_readLockRows(void)
{
    READ_LOCALS(LockRows);

    ReadCommonPlan(&local_node->plan);

    READ_NODE_FIELD(rowMarks);
    READ_INT_FIELD(epqParam);

    READ_DONE();
}

/*
 * _readLimit
 */
static Limit *
_readLimit(void)
{
    READ_LOCALS(Limit);

    ReadCommonPlan(&local_node->plan);

    READ_NODE_FIELD(limitOffset);
    READ_NODE_FIELD(limitCount);
    READ_ENUM_FIELD(limitOption, LimitOption);
    READ_INT_FIELD(uniqNumCols);
    READ_ATTRNUMBER_ARRAY(uniqColIdx, local_node->uniqNumCols);
    READ_OID_ARRAY(uniqOperators, local_node->uniqNumCols);
    READ_OID_ARRAY(uniqCollations, local_node->uniqNumCols);

    READ_DONE();
}

/*
 * _readNestLoopParam
 */
static NestLoopParam *
_readNestLoopParam(void)
{
    READ_LOCALS(NestLoopParam);

    READ_INT_FIELD(paramno);
    READ_NODE_FIELD(paramval);

    READ_DONE();
}

/*
 * _readPlanRowMark
 */
static PlanRowMark *
_readPlanRowMark(void)
{
    READ_LOCALS(PlanRowMark);

    READ_UINT_FIELD(rti);
    READ_UINT_FIELD(prti);
    READ_UINT_FIELD(rowmarkId);
    READ_ENUM_FIELD(markType, RowMarkType);
    READ_INT_FIELD(allMarkTypes);
    READ_ENUM_FIELD(strength, LockClauseStrength);
    READ_ENUM_FIELD(waitPolicy, LockWaitPolicy);
    READ_BOOL_FIELD(isParent);

    READ_DONE();
}

static PartitionPruneInfo *
_readPartitionPruneInfo(void)
{
    READ_LOCALS(PartitionPruneInfo);

    READ_NODE_FIELD(prune_infos);
    READ_BITMAPSET_FIELD(other_subplans);

    READ_DONE();
}

static PartitionedRelPruneInfo *
_readPartitionedRelPruneInfo(void)
{
    READ_LOCALS(PartitionedRelPruneInfo);

    READ_UINT_FIELD(rtindex);
    READ_BITMAPSET_FIELD(present_parts);
    READ_INT_FIELD(nparts);
    READ_INT_ARRAY(subplan_map, local_node->nparts);
    READ_INT_ARRAY(subpart_map, local_node->nparts);
    READ_OID_ARRAY(relid_map, local_node->nparts);
    READ_NODE_FIELD(initial_pruning_steps);
    READ_NODE_FIELD(exec_pruning_steps);
    READ_BITMAPSET_FIELD(execparamids);

    READ_DONE();
}

static PartitionPruneStepOp *
_readPartitionPruneStepOp(void)
{
    READ_LOCALS(PartitionPruneStepOp);

    READ_INT_FIELD(step.step_id);
    READ_INT_FIELD(opstrategy);
    READ_NODE_FIELD(exprs);
    READ_NODE_FIELD(cmpfns);
    READ_BITMAPSET_FIELD(nullkeys);

    READ_DONE();
}

static PartitionPruneStepCombine *
_readPartitionPruneStepCombine(void)
{
    READ_LOCALS(PartitionPruneStepCombine);

    READ_INT_FIELD(step.step_id);
    READ_ENUM_FIELD(combineOp, PartitionPruneCombineOp);
    READ_NODE_FIELD(source_stepids);

    READ_DONE();
}

/*
 * _readPlanInvalItem
 */
static PlanInvalItem *
_readPlanInvalItem(void)
{
    READ_LOCALS(PlanInvalItem);

    READ_INT_FIELD(cacheId);
    READ_UINT_FIELD(hashValue);

    READ_DONE();
}

/*
 * _readSubPlan
 */
static SubPlan *
_readSubPlan(void)
{
    READ_LOCALS(SubPlan);

    READ_ENUM_FIELD(subLinkType, SubLinkType);
    READ_NODE_FIELD(testexpr);
    READ_NODE_FIELD(paramIds);
    READ_INT_FIELD(plan_id);
    READ_STRING_FIELD(plan_name);
    READ_OID_FIELD(firstColType);
    READ_INT_FIELD(firstColTypmod);
    READ_OID_FIELD(firstColCollation);
    READ_BOOL_FIELD(useHashTable);
    READ_BOOL_FIELD(unknownEqFalse);
    READ_BOOL_FIELD(parallel_safe);
    READ_NODE_FIELD(setParam);
    READ_NODE_FIELD(parParam);
    READ_NODE_FIELD(args);
    READ_FLOAT_FIELD(startup_cost);
    READ_FLOAT_FIELD(per_call_cost);

    READ_DONE();
}

/*
 * _readAlternativeSubPlan
 */
static AlternativeSubPlan *
_readAlternativeSubPlan(void)
{
    READ_LOCALS(AlternativeSubPlan);

    READ_NODE_FIELD(subplans);

    READ_DONE();
}

/*
 * _readExtensibleNode
 */
static ExtensibleNode *
_readExtensibleNode(void)
{
    const ExtensibleNodeMethods *methods;
    ExtensibleNode *local_node;
    const char *extnodename;

    READ_TEMP_LOCALS();

    token = pg_strtok(&length); /* skip :extnodename */
    token = pg_strtok(&length); /* get extnodename */

    extnodename = nullable_string(token, length);
    if (!extnodename)
        elog(ERROR, "extnodename has to be supplied");
    methods = GetExtensibleNodeMethods(extnodename, false);

    local_node = (ExtensibleNode *) newNode(methods->node_size,
                                            T_ExtensibleNode);
    local_node->extnodename = extnodename;

    /* deserialize the private fields */
    methods->nodeRead(local_node);

    READ_DONE();
}

/*
 * _readPartitionBoundSpec
 */
static PartitionBoundSpec *
_readPartitionBoundSpec(void)
{
    READ_LOCALS(PartitionBoundSpec);

    READ_CHAR_FIELD(strategy);
    READ_BOOL_FIELD(is_default);
    READ_INT_FIELD(modulus);
    READ_INT_FIELD(remainder);
    READ_NODE_FIELD(listdatums);
    READ_NODE_FIELD(lowerdatums);
    READ_NODE_FIELD(upperdatums);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * _readPartitionRangeDatum
 */
static PartitionRangeDatum *
_readPartitionRangeDatum(void)
{
    READ_LOCALS(PartitionRangeDatum);

    READ_ENUM_FIELD(kind, PartitionRangeDatumKind);
    READ_NODE_FIELD(value);
    READ_LOCATION_FIELD(location);

    READ_DONE();
}

/*
 * parseNodeString
 *
 * Given a character string representing a node tree, parseNodeString creates
 * the internal node structure.
 *
 * The string to be read must already have been loaded into pg_strtok().
 */
Node *
parseNodeString(void)
{
    void       *return_value;

    READ_TEMP_LOCALS();

    /* Guard against stack overflow due to overly complex expressions */
    check_stack_depth();

    token = pg_strtok(&length);

#define MATCH(tokname, namelen) \
    (length == namelen && memcmp(token, tokname, namelen) == 0)

    if (MATCH("QUERY", 5))
        return_value = _readQuery();
    else if (MATCH("WITHCHECKOPTION", 15))
        return_value = _readWithCheckOption();
    else if (MATCH("SORTGROUPCLAUSE", 15))
        return_value = _readSortGroupClause();
    else if (MATCH("GROUPINGSET", 11))
        return_value = _readGroupingSet();
    else if (MATCH("WINDOWCLAUSE", 12))
        return_value = _readWindowClause();
    else if (MATCH("ROWMARKCLAUSE", 13))
        return_value = _readRowMarkClause();
    else if (MATCH("COMMONTABLEEXPR", 15))
        return_value = _readCommonTableExpr();
    else if (MATCH("SETOPERATIONSTMT", 16))
        return_value = _readSetOperationStmt();
    else if (MATCH("ALIAS", 5))
        return_value = _readAlias();
    else if (MATCH("RANGEVAR", 8))
        return_value = _readRangeVar();
    else if (MATCH("INTOCLAUSE", 10))
        return_value = _readIntoClause();
    else if (MATCH("TABLEFUNC", 9))
        return_value = _readTableFunc();
    else if (MATCH("VAR", 3))
        return_value = _readVar();
    else if (MATCH("CONST", 5))
        return_value = _readConst();
    else if (MATCH("PARAM", 5))
        return_value = _readParam();
    else if (MATCH("AGGREF", 6))
        return_value = _readAggref();
    else if (MATCH("GROUPINGFUNC", 12))
        return_value = _readGroupingFunc();
    else if (MATCH("WINDOWFUNC", 10))
        return_value = _readWindowFunc();
    else if (MATCH("SUBSCRIPTINGREF", 15))
        return_value = _readSubscriptingRef();
    else if (MATCH("FUNCEXPR", 8))
        return_value = _readFuncExpr();
    else if (MATCH("NAMEDARGEXPR", 12))
        return_value = _readNamedArgExpr();
    else if (MATCH("OPEXPR", 6))
        return_value = _readOpExpr();
    else if (MATCH("DISTINCTEXPR", 12))
        return_value = _readDistinctExpr();
    else if (MATCH("NULLIFEXPR", 10))
        return_value = _readNullIfExpr();
    else if (MATCH("SCALARARRAYOPEXPR", 17))
        return_value = _readScalarArrayOpExpr();
    else if (MATCH("BOOLEXPR", 8))
        return_value = _readBoolExpr();
    else if (MATCH("SUBLINK", 7))
        return_value = _readSubLink();
    else if (MATCH("FIELDSELECT", 11))
        return_value = _readFieldSelect();
    else if (MATCH("FIELDSTORE", 10))
        return_value = _readFieldStore();
    else if (MATCH("RELABELTYPE", 11))
        return_value = _readRelabelType();
    else if (MATCH("COERCEVIAIO", 11))
        return_value = _readCoerceViaIO();
    else if (MATCH("ARRAYCOERCEEXPR", 15))
        return_value = _readArrayCoerceExpr();
    else if (MATCH("CONVERTROWTYPEEXPR", 18))
        return_value = _readConvertRowtypeExpr();
    else if (MATCH("COLLATE", 7))
        return_value = _readCollateExpr();
    else if (MATCH("CASE", 4))
        return_value = _readCaseExpr();
    else if (MATCH("WHEN", 4))
        return_value = _readCaseWhen();
    else if (MATCH("CASETESTEXPR", 12))
        return_value = _readCaseTestExpr();
    else if (MATCH("ARRAY", 5))
        return_value = _readArrayExpr();
    else if (MATCH("ROW", 3))
        return_value = _readRowExpr();
    else if (MATCH("ROWCOMPARE", 10))
        return_value = _readRowCompareExpr();
    else if (MATCH("COALESCE", 8))
        return_value = _readCoalesceExpr();
    else if (MATCH("MINMAX", 6))
        return_value = _readMinMaxExpr();
    else if (MATCH("SQLVALUEFUNCTION", 16))
        return_value = _readSQLValueFunction();
    else if (MATCH("XMLEXPR", 7))
        return_value = _readXmlExpr();
    else if (MATCH("NULLTEST", 8))
        return_value = _readNullTest();
    else if (MATCH("BOOLEANTEST", 11))
        return_value = _readBooleanTest();
    else if (MATCH("COERCETODOMAIN", 14))
        return_value = _readCoerceToDomain();
    else if (MATCH("COERCETODOMAINVALUE", 19))
        return_value = _readCoerceToDomainValue();
    else if (MATCH("SETTODEFAULT", 12))
        return_value = _readSetToDefault();
    else if (MATCH("CURRENTOFEXPR", 13))
        return_value = _readCurrentOfExpr();
    else if (MATCH("NEXTVALUEEXPR", 13))
        return_value = _readNextValueExpr();
    else if (MATCH("INFERENCEELEM", 13))
        return_value = _readInferenceElem();
    else if (MATCH("TARGETENTRY", 11))
        return_value = _readTargetEntry();
    else if (MATCH("RANGETBLREF", 11))
        return_value = _readRangeTblRef();
    else if (MATCH("JOINEXPR", 8))
        return_value = _readJoinExpr();
    else if (MATCH("FROMEXPR", 8))
        return_value = _readFromExpr();
    else if (MATCH("ONCONFLICTEXPR", 14))
        return_value = _readOnConflictExpr();
    else if (MATCH("APPENDRELINFO", 13))
        return_value = _readAppendRelInfo();
    else if (MATCH("RTE", 3))
        return_value = _readRangeTblEntry();
    else if (MATCH("RANGETBLFUNCTION", 16))
        return_value = _readRangeTblFunction();
    else if (MATCH("TABLESAMPLECLAUSE", 17))
        return_value = _readTableSampleClause();
    else if (MATCH("NOTIFY", 6))
        return_value = _readNotifyStmt();
    else if (MATCH("DEFELEM", 7))
        return_value = _readDefElem();
    else if (MATCH("DECLARECURSOR", 13))
        return_value = _readDeclareCursorStmt();
    else if (MATCH("PLANNEDSTMT", 11))
        return_value = _readPlannedStmt();
    else if (MATCH("PLAN", 4))
        return_value = _readPlan();
    else if (MATCH("RESULT", 6))
        return_value = _readResult();
    else if (MATCH("PROJECTSET", 10))
        return_value = _readProjectSet();
    else if (MATCH("MODIFYTABLE", 11))
        return_value = _readModifyTable();
    else if (MATCH("APPEND", 6))
        return_value = _readAppend();
    else if (MATCH("MERGEAPPEND", 11))
        return_value = _readMergeAppend();
    else if (MATCH("RECURSIVEUNION", 14))
        return_value = _readRecursiveUnion();
    else if (MATCH("BITMAPAND", 9))
        return_value = _readBitmapAnd();
    else if (MATCH("BITMAPOR", 8))
        return_value = _readBitmapOr();
    else if (MATCH("SCAN", 4))
        return_value = _readScan();
    else if (MATCH("SEQSCAN", 7))
        return_value = _readSeqScan();
    else if (MATCH("SAMPLESCAN", 10))
        return_value = _readSampleScan();
    else if (MATCH("INDEXSCAN", 9))
        return_value = _readIndexScan();
    else if (MATCH("INDEXONLYSCAN", 13))
        return_value = _readIndexOnlyScan();
    else if (MATCH("BITMAPINDEXSCAN", 15))
        return_value = _readBitmapIndexScan();
    else if (MATCH("BITMAPHEAPSCAN", 14))
        return_value = _readBitmapHeapScan();
    else if (MATCH("TIDSCAN", 7))
        return_value = _readTidScan();
    else if (MATCH("SUBQUERYSCAN", 12))
        return_value = _readSubqueryScan();
    else if (MATCH("FUNCTIONSCAN", 12))
        return_value = _readFunctionScan();
    else if (MATCH("VALUESSCAN", 10))
        return_value = _readValuesScan();
    else if (MATCH("TABLEFUNCSCAN", 13))
        return_value = _readTableFuncScan();
    else if (MATCH("CTESCAN", 7))
        return_value = _readCteScan();
    else if (MATCH("NAMEDTUPLESTORESCAN", 19))
        return_value = _readNamedTuplestoreScan();
    else if (MATCH("WORKTABLESCAN", 13))
        return_value = _readWorkTableScan();
    else if (MATCH("FOREIGNSCAN", 11))
        return_value = _readForeignScan();
    else if (MATCH("CUSTOMSCAN", 10))
        return_value = _readCustomScan();
    else if (MATCH("JOIN", 4))
        return_value = _readJoin();
    else if (MATCH("NESTLOOP", 8))
        return_value = _readNestLoop();
    else if (MATCH("MERGEJOIN", 9))
        return_value = _readMergeJoin();
    else if (MATCH("HASHJOIN", 8))
        return_value = _readHashJoin();
    else if (MATCH("MATERIAL", 8))
        return_value = _readMaterial();
    else if (MATCH("SORT", 4))
        return_value = _readSort();
    else if (MATCH("INCREMENTALSORT", 15))
        return_value = _readIncrementalSort();
    else if (MATCH("GROUP", 5))
        return_value = _readGroup();
    else if (MATCH("AGG", 3))
        return_value = _readAgg();
    else if (MATCH("WINDOWAGG", 9))
        return_value = _readWindowAgg();
    else if (MATCH("UNIQUE", 6))
        return_value = _readUnique();
    else if (MATCH("GATHER", 6))
        return_value = _readGather();
    else if (MATCH("GATHERMERGE", 11))
        return_value = _readGatherMerge();
    else if (MATCH("HASH", 4))
        return_value = _readHash();
    else if (MATCH("SETOP", 5))
        return_value = _readSetOp();
    else if (MATCH("LOCKROWS", 8))
        return_value = _readLockRows();
    else if (MATCH("LIMIT", 5))
        return_value = _readLimit();
    else if (MATCH("NESTLOOPPARAM", 13))
        return_value = _readNestLoopParam();
    else if (MATCH("PLANROWMARK", 11))
        return_value = _readPlanRowMark();
    else if (MATCH("PARTITIONPRUNEINFO", 18))
        return_value = _readPartitionPruneInfo();
    else if (MATCH("PARTITIONEDRELPRUNEINFO", 23))
        return_value = _readPartitionedRelPruneInfo();
    else if (MATCH("PARTITIONPRUNESTEPOP", 20))
        return_value = _readPartitionPruneStepOp();
    else if (MATCH("PARTITIONPRUNESTEPCOMBINE", 25))
        return_value = _readPartitionPruneStepCombine();
    else if (MATCH("PLANINVALITEM", 13))
        return_value = _readPlanInvalItem();
    else if (MATCH("SUBPLAN", 7))
        return_value = _readSubPlan();
    else if (MATCH("ALTERNATIVESUBPLAN", 18))
        return_value = _readAlternativeSubPlan();
    else if (MATCH("EXTENSIBLENODE", 14))
        return_value = _readExtensibleNode();
    else if (MATCH("PARTITIONBOUNDSPEC", 18))
        return_value = _readPartitionBoundSpec();
    else if (MATCH("PARTITIONRANGEDATUM", 19))
        return_value = _readPartitionRangeDatum();
    else
    {
        elog(ERROR, "badly formatted node string \"%.32s\"...", token);
        return_value = NULL;    /* keep compiler quiet */
    }

    return (Node *) return_value;
}


/*
 * readDatum
 *
 * Given a string representation of a constant, recreate the appropriate
 * Datum.  The string representation embeds length info, but not byValue,
 * so we must be told that.
 */
Datum
readDatum(bool typbyval)
{
    Size        length,
                i;
    int         tokenLength;
    const char *token;
    Datum       res;
    char       *s;

    /*
     * read the actual length of the value
     */
    token = pg_strtok(&tokenLength);
    length = atoui(token);

    token = pg_strtok(&tokenLength);    /* read the '[' */
    if (token == NULL || token[0] != '[')
        elog(ERROR, "expected \"[\" to start datum, but got \"%s\"; length = %zu",
             token ? token : "[NULL]", length);

    if (typbyval)
    {
        if (length > (Size) sizeof(Datum))
            elog(ERROR, "byval datum but length = %zu", length);
        res = (Datum) 0;
        s = (char *) (&res);
        for (i = 0; i < (Size) sizeof(Datum); i++)
        {
            token = pg_strtok(&tokenLength);
            s[i] = (char) atoi(token);
        }
    }
    else if (length <= 0)
        res = (Datum) NULL;
    else
    {
        s = (char *) palloc(length);
        for (i = 0; i < length; i++)
        {
            token = pg_strtok(&tokenLength);
            s[i] = (char) atoi(token);
        }
        res = PointerGetDatum(s);
    }

    token = pg_strtok(&tokenLength);    /* read the ']' */
    if (token == NULL || token[0] != ']')
        elog(ERROR, "expected \"]\" to end datum, but got \"%s\"; length = %zu",
             token ? token : "[NULL]", length);

    return res;
}

/*
 * readAttrNumberCols
 */
AttrNumber *
readAttrNumberCols(int numCols)
{
    int         tokenLength,
                i;
    const char *token;
    AttrNumber *attr_vals;

    if (numCols <= 0)
        return NULL;

    attr_vals = (AttrNumber *) palloc(numCols * sizeof(AttrNumber));
    for (i = 0; i < numCols; i++)
    {
        token = pg_strtok(&tokenLength);
        attr_vals[i] = atoi(token);
    }

    return attr_vals;
}

/*
 * readOidCols
 */
Oid *
readOidCols(int numCols)
{
    int         tokenLength,
                i;
    const char *token;
    Oid        *oid_vals;

    if (numCols <= 0)
        return NULL;

    oid_vals = (Oid *) palloc(numCols * sizeof(Oid));
    for (i = 0; i < numCols; i++)
    {
        token = pg_strtok(&tokenLength);
        oid_vals[i] = atooid(token);
    }

    return oid_vals;
}

/*
 * readIntCols
 */
int *
readIntCols(int numCols)
{
    int         tokenLength,
                i;
    const char *token;
    int        *int_vals;

    if (numCols <= 0)
        return NULL;

    int_vals = (int *) palloc(numCols * sizeof(int));
    for (i = 0; i < numCols; i++)
    {
        token = pg_strtok(&tokenLength);
        int_vals[i] = atoi(token);
    }

    return int_vals;
}

/*
 * readBoolCols
 */
bool *
readBoolCols(int numCols)
{
    int         tokenLength,
                i;
    const char *token;
    bool       *bool_vals;

    if (numCols <= 0)
        return NULL;

    bool_vals = (bool *) palloc(numCols * sizeof(bool));
    for (i = 0; i < numCols; i++)
    {
        token = pg_strtok(&tokenLength);
        bool_vals[i] = strtobool(token);
    }

    return bool_vals;
}