forked from huawei/openGauss-server
59 lines
2.5 KiB
C
59 lines
2.5 KiB
C
/* -------------------------------------------------------------------------
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*
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* postgres_fdw.h
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* Foreign-data wrapper for remote PostgreSQL servers
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*
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* Portions Copyright (c) 2020 Huawei Technologies Co.,Ltd.
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* Portions Copyright (c) 2012-2014, PostgreSQL Global Development Group
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*
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* IDENTIFICATION
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* contrib/postgres_fdw/postgres_fdw.h
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*
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* -------------------------------------------------------------------------
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*/
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#ifndef POSTGRES_FDW_H
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#define POSTGRES_FDW_H
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#include "foreign/foreign.h"
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#include "lib/stringinfo.h"
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#include "nodes/relation.h"
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#include "utils/rel.h"
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#include "libpq/libpq-fe.h"
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/* in postgres_fdw.c */
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extern int set_transmission_modes(void);
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extern void reset_transmission_modes(int nestlevel);
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/* in connection.c */
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extern PGconn *GetConnection(ForeignServer *server, UserMapping *user, bool will_prep_stmt);
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extern void ReleaseConnection(PGconn *conn);
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extern unsigned int GetCursorNumber(PGconn *conn);
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extern unsigned int GetPrepStmtNumber(PGconn *conn);
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extern PGresult *pgfdw_get_result(PGconn *conn, const char *query);
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extern PGresult *pgfdw_exec_query(PGconn *conn, const char *query);
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extern void pgfdw_report_error(int elevel, PGresult *res, PGconn *conn, bool clear, const char *sql);
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/* in option.c */
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extern int ExtractConnectionOptions(List *defelems, const char **keywords, const char **values);
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/* in deparse.c */
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extern void classifyConditions(PlannerInfo *root, RelOptInfo *baserel, List *input_conds, List **remote_conds,
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List **local_conds);
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extern bool is_foreign_expr(PlannerInfo *root, RelOptInfo *baserel, Expr *expr);
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extern void deparseSelectSql(StringInfo buf, PlannerInfo *root, RelOptInfo *baserel, Bitmapset *attrs_used,
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List **retrieved_attrs);
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extern void appendWhereClause(StringInfo buf, PlannerInfo *root, RelOptInfo *baserel, List *exprs, bool is_first,
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List **params);
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extern void deparseInsertSql(StringInfo buf, RangeTblEntry *rte, Index rtindex, Relation rel, List *targetAttrs,
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List *returningList, List **retrieved_attrs);
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extern void deparseUpdateSql(StringInfo buf, RangeTblEntry *rte, Index rtindex, Relation rel, List *targetAttrs,
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List *returningList, List **retrieved_attrs);
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extern void deparseDeleteSql(StringInfo buf, RangeTblEntry *rte, Index rtindex, Relation rel, List *returningList,
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List **retrieved_attrs);
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extern void deparseAnalyzeSizeSql(StringInfo buf, Relation rel);
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extern void deparseAnalyzeSql(StringInfo buf, Relation rel, List **retrieved_attrs);
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#endif /* POSTGRES_FDW_H */
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