Function transformCreateExternalStmt

src/backend/parser/parse_utilcmd.c:2225–2402

}

List *
transformCreateExternalStmt(CreateExternalStmt *stmt, const char *queryString)
{
	ParseState *pstate;
	CreateStmtContext cxt;
	List	   *result;
	ListCell   *elements;
	DistributedBy *likeDistributedBy = NULL;
	bool	    bQuiet = false;	/* shut up transformDistributedBy messages */
	bool		iswritable = false;

	/* Set up pstate */
	pstate = make_parsestate(NULL);
	pstate->p_sourcetext = queryString;

	memset(&cxt, 0, sizeof(CreateStmtContext));

	/*
	 * Create a temporary context in order to confine memory leaks due
	 * to expansions within a short lived context
	 */
	cxt.tempCtx = AllocSetContextCreate(CurrentMemoryContext,
							  "CreateExteranlStmt analyze context",
							  ALLOCSET_DEFAULT_MINSIZE,
							  ALLOCSET_DEFAULT_INITSIZE,
							  ALLOCSET_DEFAULT_MAXSIZE);

	/*
	 * There exist transformations that might write on the passed on stmt.
	 * Create a copy of it to both protect from (un)intentional writes and be
	 * a bit more explicit of the intended ownership.
	 */
	stmt = (CreateExternalStmt *)copyObject(stmt);

	cxt.pstate = pstate;
	cxt.stmtType = "CREATE EXTERNAL TABLE";
	cxt.relation = stmt->relation;
	cxt.inhRelations = NIL;
	cxt.isalter = false;
	cxt.columns = NIL;
	cxt.ckconstraints = NIL;
	cxt.fkconstraints = NIL;
	cxt.ixconstraints = NIL;
	cxt.attr_encodings = NIL;
	cxt.pkey = NULL;
	cxt.rel = NULL;

	cxt.blist = NIL;
	cxt.alist = NIL;

	iswritable = stmt->iswritable;

	/*
	 * Run through each primary element in the table creation clause. Separate
	 * column defs from constraints, and do preliminary analysis.
	 */
	foreach(elements, stmt->tableElts)
	{