diff options
Diffstat (limited to 'src/include/commands/prepare.h')
| -rw-r--r-- | src/include/commands/prepare.h | 41 |
1 files changed, 16 insertions, 25 deletions
diff --git a/src/include/commands/prepare.h b/src/include/commands/prepare.h index a921bf1b045..4e27ab3bb39 100644 --- a/src/include/commands/prepare.h +++ b/src/include/commands/prepare.h @@ -6,7 +6,7 @@ * * Copyright (c) 2002-2007, PostgreSQL Global Development Group * - * $PostgreSQL: pgsql/src/include/commands/prepare.h,v 1.24 2007/02/20 17:32:17 tgl Exp $ + * $PostgreSQL: pgsql/src/include/commands/prepare.h,v 1.25 2007/03/13 00:33:43 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -14,58 +14,49 @@ #define PREPARE_H #include "executor/executor.h" +#include "utils/plancache.h" #include "utils/timestamp.h" /* - * The data structure representing a prepared statement + * The data structure representing a prepared statement. This is now just + * a thin veneer over a plancache entry --- the main addition is that of + * a name. * - * A prepared statement might be fully planned, or only parsed-and-rewritten. - * If fully planned, stmt_list contains PlannedStmts and/or utility statements; - * if not, it contains Query nodes. - * - * Note: all subsidiary storage lives in the context denoted by the context - * field. However, the string referenced by commandTag is not subsidiary - * storage; it is assumed to be a compile-time-constant string. As with - * portals, commandTag shall be NULL if and only if the original query string - * (before rewriting) was an empty string. + * Note: all subsidiary storage lives in the referenced plancache entry. */ typedef struct { /* dynahash.c requires key to be first field */ char stmt_name[NAMEDATALEN]; - char *query_string; /* text of query, or NULL */ - const char *commandTag; /* command tag (a constant!), or NULL */ - List *stmt_list; /* list of statement or Query nodes */ - List *argtype_list; /* list of parameter type OIDs */ - bool fully_planned; /* what is in stmt_list, exactly? */ + CachedPlanSource *plansource; /* the actual cached plan */ bool from_sql; /* prepared via SQL, not FE/BE protocol? */ TimestampTz prepare_time; /* the time when the stmt was prepared */ - MemoryContext context; /* context containing this query */ } PreparedStatement; /* Utility statements PREPARE, EXECUTE, DEALLOCATE, EXPLAIN EXECUTE */ -extern void PrepareQuery(PrepareStmt *stmt); -extern void ExecuteQuery(ExecuteStmt *stmt, ParamListInfo params, +extern void PrepareQuery(PrepareStmt *stmt, const char *queryString); +extern void ExecuteQuery(ExecuteStmt *stmt, const char *queryString, + ParamListInfo params, DestReceiver *dest, char *completionTag); extern void DeallocateQuery(DeallocateStmt *stmt); -extern void ExplainExecuteQuery(ExplainStmt *stmt, ParamListInfo params, - TupOutputState *tstate); +extern void ExplainExecuteQuery(ExecuteStmt *execstmt, ExplainStmt *stmt, + const char *queryString, + ParamListInfo params, TupOutputState *tstate); /* Low-level access to stored prepared statements */ extern void StorePreparedStatement(const char *stmt_name, + Node *raw_parse_tree, const char *query_string, const char *commandTag, + Oid *param_types, + int num_params, List *stmt_list, - List *argtype_list, - bool fully_planned, bool from_sql); extern PreparedStatement *FetchPreparedStatement(const char *stmt_name, bool throwError); extern void DropPreparedStatement(const char *stmt_name, bool showError); -extern List *FetchPreparedStatementParams(const char *stmt_name); extern TupleDesc FetchPreparedStatementResultDesc(PreparedStatement *stmt); -extern bool PreparedStatementReturnsTuples(PreparedStatement *stmt); extern List *FetchPreparedStatementTargetList(PreparedStatement *stmt); #endif /* PREPARE_H */ |