greenplumn external 源码
greenplumn external 代码
文件路径：/src/include/access/external.h
/*-------------------------------------------------------------------------
*
* external.h
* routines for getting external info from external table foreign table.
*
* Portions Copyright (c) 2020-Present VMware, Inc. or its affiliates.
*
*
* IDENTIFICATION
* src/include/access/external.h
*
*-------------------------------------------------------------------------
*/
#ifndef EXTERNAL_H
#define EXTERNAL_H
#include "nodes/pg_list.h"
#include "nodes/plannodes.h"
#define fmttype_is_custom(c) (c == 'b')
#define fmttype_is_text(c) (c == 't')
#define fmttype_is_csv(c) (c == 'c')
/*
* Descriptor of a single external relation.
* For now very similar to the catalog row itself but may change in time.
*/
typedef struct ExtTableEntry
{
List* urilocations;
List* execlocations;
char fmtcode;
List* options;
char* command;
int rejectlimit;
char rejectlimittype;
char logerrors;
int encoding;
bool iswritable;
bool isweb; /* extra state, not cataloged */
} ExtTableEntry;
extern List * TokenizeLocationUris(char *locations);
extern ExtTableEntry *GetExtTableEntry(Oid relid);
extern ExtTableEntry *GetExtTableEntryIfExists(Oid relid);
extern ExtTableEntry *GetExtFromForeignTableOptions(List *ftoptons, Oid relid);
extern ExternalScanInfo *MakeExternalScanInfo(ExtTableEntry *extEntry);
extern ForeignScan *BuildForeignScanForExternalTable(Oid relid, Index scanrelid, List *qual, List *targetlist);
#endif /* EXTERNAL_H */
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