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Edit File: plpgsql.h

/*------------------------------------------------------------------------- * * plpgsql.h - Definitions for the PL/pgSQL * procedural language * * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * * * IDENTIFICATION * src/pl/plpgsql/src/plpgsql.h * *------------------------------------------------------------------------- */ #ifndef PLPGSQL_H #define PLPGSQL_H #include "postgres.h" #include "access/xact.h" #include "commands/trigger.h" #include "executor/spi.h" /********************************************************************** * Definitions **********************************************************************/ /* define our text domain for translations */ #undef TEXTDOMAIN #define TEXTDOMAIN PG_TEXTDOMAIN("plpgsql") #undef _ #define _(x) dgettext(TEXTDOMAIN, x) /* ---------- * Compiler's namespace item types * ---------- */ enum { PLPGSQL_NSTYPE_LABEL, PLPGSQL_NSTYPE_VAR, PLPGSQL_NSTYPE_ROW, PLPGSQL_NSTYPE_REC }; /* ---------- * Datum array node types * ---------- */ enum { PLPGSQL_DTYPE_VAR, PLPGSQL_DTYPE_ROW, PLPGSQL_DTYPE_REC, PLPGSQL_DTYPE_RECFIELD, PLPGSQL_DTYPE_ARRAYELEM, PLPGSQL_DTYPE_EXPR }; /* ---------- * Variants distinguished in PLpgSQL_type structs * ---------- */ enum { PLPGSQL_TTYPE_SCALAR, /* scalar types and domains */ PLPGSQL_TTYPE_ROW, /* composite types */ PLPGSQL_TTYPE_REC, /* RECORD pseudotype */ PLPGSQL_TTYPE_PSEUDO /* other pseudotypes */ }; /* ---------- * Execution tree node types * ---------- */ enum PLpgSQL_stmt_types { PLPGSQL_STMT_BLOCK, PLPGSQL_STMT_ASSIGN, PLPGSQL_STMT_IF, PLPGSQL_STMT_CASE, PLPGSQL_STMT_LOOP, PLPGSQL_STMT_WHILE, PLPGSQL_STMT_FORI, PLPGSQL_STMT_FORS, PLPGSQL_STMT_FORC, PLPGSQL_STMT_FOREACH_A, PLPGSQL_STMT_EXIT, PLPGSQL_STMT_RETURN, PLPGSQL_STMT_RETURN_NEXT, PLPGSQL_STMT_RETURN_QUERY, PLPGSQL_STMT_RAISE, PLPGSQL_STMT_EXECSQL, PLPGSQL_STMT_DYNEXECUTE, PLPGSQL_STMT_DYNFORS, PLPGSQL_STMT_GETDIAG, PLPGSQL_STMT_OPEN, PLPGSQL_STMT_FETCH, PLPGSQL_STMT_CLOSE, PLPGSQL_STMT_PERFORM }; /* ---------- * Execution node return codes * ---------- */ enum { PLPGSQL_RC_OK, PLPGSQL_RC_EXIT, PLPGSQL_RC_RETURN, PLPGSQL_RC_CONTINUE }; /* ---------- * GET DIAGNOSTICS information items * ---------- */ enum { PLPGSQL_GETDIAG_ROW_COUNT, PLPGSQL_GETDIAG_RESULT_OID, PLPGSQL_GETDIAG_ERROR_CONTEXT, PLPGSQL_GETDIAG_ERROR_DETAIL, PLPGSQL_GETDIAG_ERROR_HINT, PLPGSQL_GETDIAG_RETURNED_SQLSTATE, PLPGSQL_GETDIAG_MESSAGE_TEXT }; /* -------- * RAISE statement options * -------- */ enum { PLPGSQL_RAISEOPTION_ERRCODE, PLPGSQL_RAISEOPTION_MESSAGE, PLPGSQL_RAISEOPTION_DETAIL, PLPGSQL_RAISEOPTION_HINT }; /* -------- * Behavioral modes for plpgsql variable resolution * -------- */ typedef enum { PLPGSQL_RESOLVE_ERROR, /* throw error if ambiguous */ PLPGSQL_RESOLVE_VARIABLE, /* prefer plpgsql var to table column */ PLPGSQL_RESOLVE_COLUMN /* prefer table column to plpgsql var */ } PLpgSQL_resolve_option; /********************************************************************** * Node and structure definitions **********************************************************************/ typedef struct { /* Postgres data type */ char *typname; /* (simple) name of the type */ Oid typoid; /* OID of the data type */ int ttype; /* PLPGSQL_TTYPE_ code */ int16 typlen; /* stuff copied from its pg_type entry */ bool typbyval; Oid typrelid; Oid typioparam; Oid collation; /* from pg_type, but can be overridden */ FmgrInfo typinput; /* lookup info for typinput function */ int32 atttypmod; /* typmod (taken from someplace else) */ } PLpgSQL_type; /* * PLpgSQL_datum is the common supertype for PLpgSQL_expr, PLpgSQL_var, * PLpgSQL_row, PLpgSQL_rec, PLpgSQL_recfield, and PLpgSQL_arrayelem */ typedef struct { /* Generic datum array item */ int dtype; int dno; } PLpgSQL_datum; /* * The variants PLpgSQL_var, PLpgSQL_row, and PLpgSQL_rec share these * fields */ typedef struct { /* Scalar or composite variable */ int dtype; int dno; char *refname; int lineno; } PLpgSQL_variable; typedef struct PLpgSQL_expr { /* SQL Query to plan and execute */ int dtype; int dno; char *query; SPIPlanPtr plan; Bitmapset *paramnos; /* all dnos referenced by this query */ /* function containing this expr (not set until we first parse query) */ struct PLpgSQL_function *func; /* namespace chain visible to this expr */ struct PLpgSQL_nsitem *ns; /* fields for "simple expression" fast-path execution: */ Expr *expr_simple_expr; /* NULL means not a simple expr */ int expr_simple_generation; /* plancache generation we checked */ Oid expr_simple_type; /* result type Oid, if simple */ /* * if expr is simple AND prepared in current transaction, * expr_simple_state and expr_simple_in_use are valid. Test validity by * seeing if expr_simple_lxid matches current LXID. (If not, * expr_simple_state probably points at garbage!) */ ExprState *expr_simple_state; /* eval tree for expr_simple_expr */ bool expr_simple_in_use; /* true if eval tree is active */ LocalTransactionId expr_simple_lxid; } PLpgSQL_expr; typedef struct { /* Scalar variable */ int dtype; int dno; char *refname; int lineno; PLpgSQL_type *datatype; int isconst; int notnull; PLpgSQL_expr *default_val; PLpgSQL_expr *cursor_explicit_expr; int cursor_explicit_argrow; int cursor_options; Datum value; bool isnull; bool freeval; } PLpgSQL_var; typedef struct { /* Row variable */ int dtype; int dno; char *refname; int lineno; TupleDesc rowtupdesc; /* * Note: TupleDesc is only set up for named rowtypes, else it is NULL. * * Note: if the underlying rowtype contains a dropped column, the * corresponding fieldnames[] entry will be NULL, and there is no * corresponding var (varnos[] will be -1). */ int nfields; char **fieldnames; int *varnos; } PLpgSQL_row; typedef struct { /* Record variable (non-fixed structure) */ int dtype; int dno; char *refname; int lineno; HeapTuple tup; TupleDesc tupdesc; bool freetup; bool freetupdesc; } PLpgSQL_rec; typedef struct { /* Field in record */ int dtype; int dno; char *fieldname; int recparentno; /* dno of parent record */ } PLpgSQL_recfield; typedef struct { /* Element of array variable */ int dtype; int dno; PLpgSQL_expr *subscript; int arrayparentno; /* dno of parent array variable */ /* Remaining fields are cached info about the array variable's type */ Oid parenttypoid; /* type of array variable; 0 if not yet set */ int32 parenttypmod; /* typmod of array variable */ Oid arraytypoid; /* OID of actual array type */ int32 arraytypmod; /* typmod of array (and its elements too) */ int16 arraytyplen; /* typlen of array type */ Oid elemtypoid; /* OID of array element type */ int16 elemtyplen; /* typlen of element type */ bool elemtypbyval; /* element type is pass-by-value? */ char elemtypalign; /* typalign of element type */ } PLpgSQL_arrayelem; typedef struct PLpgSQL_nsitem { /* Item in the compilers namespace tree */ int itemtype; int itemno; struct PLpgSQL_nsitem *prev; char name[1]; /* actually, as long as needed */ } PLpgSQL_nsitem; typedef struct { /* Generic execution node */ int cmd_type; int lineno; } PLpgSQL_stmt; typedef struct PLpgSQL_condition { /* One EXCEPTION condition name */ int sqlerrstate; /* SQLSTATE code */ char *condname; /* condition name (for debugging) */ struct PLpgSQL_condition *next; } PLpgSQL_condition; typedef struct { int sqlstate_varno; int sqlerrm_varno; List *exc_list; /* List of WHEN clauses */ } PLpgSQL_exception_block; typedef struct { /* One EXCEPTION ... WHEN clause */ int lineno; PLpgSQL_condition *conditions; List *action; /* List of statements */ } PLpgSQL_exception; typedef struct { /* Block of statements */ int cmd_type; int lineno; char *label; List *body; /* List of statements */ int n_initvars; int *initvarnos; PLpgSQL_exception_block *exceptions; } PLpgSQL_stmt_block; typedef struct { /* Assign statement */ int cmd_type; int lineno; int varno; PLpgSQL_expr *expr; } PLpgSQL_stmt_assign; typedef struct { /* PERFORM statement */ int cmd_type; int lineno; PLpgSQL_expr *expr; } PLpgSQL_stmt_perform; typedef struct { /* Get Diagnostics item */ int kind; /* id for diagnostic value desired */ int target; /* where to assign it */ } PLpgSQL_diag_item; typedef struct { /* Get Diagnostics statement */ int cmd_type; int lineno; bool is_stacked; /* STACKED or CURRENT diagnostics area? */ List *diag_items; /* List of PLpgSQL_diag_item */ } PLpgSQL_stmt_getdiag; typedef struct { /* IF statement */ int cmd_type; int lineno; PLpgSQL_expr *cond; /* boolean expression for THEN */ List *then_body; /* List of statements */ List *elsif_list; /* List of PLpgSQL_if_elsif structs */ List *else_body; /* List of statements */ } PLpgSQL_stmt_if; typedef struct /* one ELSIF arm of IF statement */ { int lineno; PLpgSQL_expr *cond; /* boolean expression for this case */ List *stmts; /* List of statements */ } PLpgSQL_if_elsif; typedef struct /* CASE statement */ { int cmd_type; int lineno; PLpgSQL_expr *t_expr; /* test expression, or NULL if none */ int t_varno; /* var to store test expression value into */ List *case_when_list; /* List of PLpgSQL_case_when structs */ bool have_else; /* flag needed because list could be empty */ List *else_stmts; /* List of statements */ } PLpgSQL_stmt_case; typedef struct /* one arm of CASE statement */ { int lineno; PLpgSQL_expr *expr; /* boolean expression for this case */ List *stmts; /* List of statements */ } PLpgSQL_case_when; typedef struct { /* Unconditional LOOP statement */ int cmd_type; int lineno; char *label; List *body; /* List of statements */ } PLpgSQL_stmt_loop; typedef struct { /* WHILE cond LOOP statement */ int cmd_type; int lineno; char *label; PLpgSQL_expr *cond; List *body; /* List of statements */ } PLpgSQL_stmt_while; typedef struct { /* FOR statement with integer loopvar */ int cmd_type; int lineno; char *label; PLpgSQL_var *var; PLpgSQL_expr *lower; PLpgSQL_expr *upper; PLpgSQL_expr *step; /* NULL means default (ie, BY 1) */ int reverse; List *body; /* List of statements */ } PLpgSQL_stmt_fori; /* * PLpgSQL_stmt_forq represents a FOR statement running over a SQL query. * It is the common supertype of PLpgSQL_stmt_fors, PLpgSQL_stmt_forc * and PLpgSQL_dynfors. */ typedef struct { int cmd_type; int lineno; char *label; PLpgSQL_rec *rec; PLpgSQL_row *row; List *body; /* List of statements */ } PLpgSQL_stmt_forq; typedef struct { /* FOR statement running over SELECT */ int cmd_type; int lineno; char *label; PLpgSQL_rec *rec; PLpgSQL_row *row; List *body; /* List of statements */ /* end of fields that must match PLpgSQL_stmt_forq */ PLpgSQL_expr *query; } PLpgSQL_stmt_fors; typedef struct { /* FOR statement running over cursor */ int cmd_type; int lineno; char *label; PLpgSQL_rec *rec; PLpgSQL_row *row; List *body; /* List of statements */ /* end of fields that must match PLpgSQL_stmt_forq */ int curvar; PLpgSQL_expr *argquery; /* cursor arguments if any */ } PLpgSQL_stmt_forc; typedef struct { /* FOR statement running over EXECUTE */ int cmd_type; int lineno; char *label; PLpgSQL_rec *rec; PLpgSQL_row *row; List *body; /* List of statements */ /* end of fields that must match PLpgSQL_stmt_forq */ PLpgSQL_expr *query; List *params; /* USING expressions */ } PLpgSQL_stmt_dynfors; typedef struct { /* FOREACH item in array loop */ int cmd_type; int lineno; char *label; int varno; /* loop target variable */ int slice; /* slice dimension, or 0 */ PLpgSQL_expr *expr; /* array expression */ List *body; /* List of statements */ } PLpgSQL_stmt_foreach_a; typedef struct { /* OPEN a curvar */ int cmd_type; int lineno; int curvar; int cursor_options; PLpgSQL_row *returntype; PLpgSQL_expr *argquery; PLpgSQL_expr *query; PLpgSQL_expr *dynquery; List *params; /* USING expressions */ } PLpgSQL_stmt_open; typedef struct { /* FETCH or MOVE statement */ int cmd_type; int lineno; PLpgSQL_rec *rec; /* target, as record or row */ PLpgSQL_row *row; int curvar; /* cursor variable to fetch from */ FetchDirection direction; /* fetch direction */ long how_many; /* count, if constant (expr is NULL) */ PLpgSQL_expr *expr; /* count, if expression */ bool is_move; /* is this a fetch or move? */ bool returns_multiple_rows; /* can return more than one row? */ } PLpgSQL_stmt_fetch; typedef struct { /* CLOSE curvar */ int cmd_type; int lineno; int curvar; } PLpgSQL_stmt_close; typedef struct { /* EXIT or CONTINUE statement */ int cmd_type; int lineno; bool is_exit; /* Is this an exit or a continue? */ char *label; /* NULL if it's an unlabelled EXIT/CONTINUE */ PLpgSQL_expr *cond; } PLpgSQL_stmt_exit; typedef struct { /* RETURN statement */ int cmd_type; int lineno; PLpgSQL_expr *expr; int retvarno; } PLpgSQL_stmt_return; typedef struct { /* RETURN NEXT statement */ int cmd_type; int lineno; PLpgSQL_expr *expr; int retvarno; } PLpgSQL_stmt_return_next; typedef struct { /* RETURN QUERY statement */ int cmd_type; int lineno; PLpgSQL_expr *query; /* if static query */ PLpgSQL_expr *dynquery; /* if dynamic query (RETURN QUERY EXECUTE) */ List *params; /* USING arguments for dynamic query */ } PLpgSQL_stmt_return_query; typedef struct { /* RAISE statement */ int cmd_type; int lineno; int elog_level; char *condname; /* condition name, SQLSTATE, or NULL */ char *message; /* old-style message format literal, or NULL */ List *params; /* list of expressions for old-style message */ List *options; /* list of PLpgSQL_raise_option */ } PLpgSQL_stmt_raise; typedef struct { /* RAISE statement option */ int opt_type; PLpgSQL_expr *expr; } PLpgSQL_raise_option; typedef struct { /* Generic SQL statement to execute */ int cmd_type; int lineno; PLpgSQL_expr *sqlstmt; bool mod_stmt; /* is the stmt INSERT/UPDATE/DELETE? */ /* note: mod_stmt is set when we plan the query */ bool into; /* INTO supplied? */ bool strict; /* INTO STRICT flag */ PLpgSQL_rec *rec; /* INTO target, if record */ PLpgSQL_row *row; /* INTO target, if row */ } PLpgSQL_stmt_execsql; typedef struct { /* Dynamic SQL string to execute */ int cmd_type; int lineno; PLpgSQL_expr *query; /* string expression */ bool into; /* INTO supplied? */ bool strict; /* INTO STRICT flag */ PLpgSQL_rec *rec; /* INTO target, if record */ PLpgSQL_row *row; /* INTO target, if row */ List *params; /* USING expressions */ } PLpgSQL_stmt_dynexecute; typedef struct PLpgSQL_func_hashkey { /* Hash lookup key for functions */ Oid funcOid; bool isTrigger; /* true if called as a trigger */ /* be careful that pad bytes in this struct get zeroed! */ /* * For a trigger function, the OID of the relation triggered on is part of * the hash key --- we want to compile the trigger separately for each * relation it is used with, in case the rowtype is different. Zero if * not called as a trigger. */ Oid trigrelOid; /* * We must include the input collation as part of the hash key too, * because we have to generate different plans (with different Param * collations) for different collation settings. */ Oid inputCollation; /* * We include actual argument types in the hash key to support polymorphic * PLpgSQL functions. Be careful that extra positions are zeroed! */ Oid argtypes[FUNC_MAX_ARGS]; } PLpgSQL_func_hashkey; typedef struct PLpgSQL_function { /* Complete compiled function */ char *fn_signature; Oid fn_oid; TransactionId fn_xmin; ItemPointerData fn_tid; bool fn_is_trigger; Oid fn_input_collation; PLpgSQL_func_hashkey *fn_hashkey; /* back-link to hashtable key */ MemoryContext fn_cxt; Oid fn_rettype; int fn_rettyplen; bool fn_retbyval; FmgrInfo fn_retinput; Oid fn_rettypioparam; bool fn_retistuple; bool fn_retset; bool fn_readonly; int fn_nargs; int fn_argvarnos[FUNC_MAX_ARGS]; int out_param_varno; int found_varno; int new_varno; int old_varno; int tg_name_varno; int tg_when_varno; int tg_level_varno; int tg_op_varno; int tg_relid_varno; int tg_relname_varno; int tg_table_name_varno; int tg_table_schema_varno; int tg_nargs_varno; int tg_argv_varno; PLpgSQL_resolve_option resolve_option; int ndatums; PLpgSQL_datum **datums; PLpgSQL_stmt_block *action; /* these fields change when the function is used */ struct PLpgSQL_execstate *cur_estate; unsigned long use_count; } PLpgSQL_function; typedef struct PLpgSQL_execstate { /* Runtime execution data */ PLpgSQL_function *func; /* function being executed */ Datum retval; bool retisnull; Oid rettype; /* type of current retval */ Oid fn_rettype; /* info about declared function rettype */ bool retistuple; bool retisset; bool readonly_func; TupleDesc rettupdesc; char *exitlabel; /* the "target" label of the current EXIT or * CONTINUE stmt, if any */ ErrorData *cur_error; /* current exception handler's error */ Tuplestorestate *tuple_store; /* SRFs accumulate results here */ MemoryContext tuple_store_cxt; ResourceOwner tuple_store_owner; ReturnSetInfo *rsi; int found_varno; int ndatums; PLpgSQL_datum **datums; /* temporary state for results from evaluation of query or expr */ SPITupleTable *eval_tuptable; uint32 eval_processed; Oid eval_lastoid; ExprContext *eval_econtext; /* for executing simple expressions */ PLpgSQL_expr *cur_expr; /* current query/expr being evaluated */ /* status information for error context reporting */ PLpgSQL_stmt *err_stmt; /* current stmt */ const char *err_text; /* additional state info */ void *plugin_info; /* reserved for use by optional plugin */ } PLpgSQL_execstate; /* * A PLpgSQL_plugin structure represents an instrumentation plugin. * To instrument PL/pgSQL, a plugin library must access the rendezvous * variable "PLpgSQL_plugin" and set it to point to a PLpgSQL_plugin struct. * Typically the struct could just be static data in the plugin library. * We expect that a plugin would do this at library load time (_PG_init()). * It must also be careful to set the rendezvous variable back to NULL * if it is unloaded (_PG_fini()). * * This structure is basically a collection of function pointers --- at * various interesting points in pl_exec.c, we call these functions * (if the pointers are non-NULL) to give the plugin a chance to watch * what we are doing. * * func_setup is called when we start a function, before we've initialized * the local variables defined by the function. * * func_beg is called when we start a function, after we've initialized * the local variables. * * func_end is called at the end of a function. * * stmt_beg and stmt_end are called before and after (respectively) each * statement. * * Also, immediately before any call to func_setup, PL/pgSQL fills in the * error_callback and assign_expr fields with pointers to its own * plpgsql_exec_error_callback and exec_assign_expr functions. This is * a somewhat ad-hoc expedient to simplify life for debugger plugins. */ typedef struct { /* Function pointers set up by the plugin */ void (*func_setup) (PLpgSQL_execstate *estate, PLpgSQL_function *func); void (*func_beg) (PLpgSQL_execstate *estate, PLpgSQL_function *func); void (*func_end) (PLpgSQL_execstate *estate, PLpgSQL_function *func); void (*stmt_beg) (PLpgSQL_execstate *estate, PLpgSQL_stmt *stmt); void (*stmt_end) (PLpgSQL_execstate *estate, PLpgSQL_stmt *stmt); /* Function pointers set by PL/pgSQL itself */ void (*error_callback) (void *arg); void (*assign_expr) (PLpgSQL_execstate *estate, PLpgSQL_datum *target, PLpgSQL_expr *expr); } PLpgSQL_plugin; /* Struct types used during parsing */ typedef struct { char *ident; /* palloc'd converted identifier */ bool quoted; /* Was it double-quoted? */ } PLword; typedef struct { List *idents; /* composite identifiers (list of String) */ } PLcword; typedef struct { PLpgSQL_datum *datum; /* referenced variable */ char *ident; /* valid if simple name */ bool quoted; List *idents; /* valid if composite name */ } PLwdatum; /********************************************************************** * Global variable declarations **********************************************************************/ typedef enum { IDENTIFIER_LOOKUP_NORMAL, /* normal processing of var names */ IDENTIFIER_LOOKUP_DECLARE, /* In DECLARE --- don't look up names */ IDENTIFIER_LOOKUP_EXPR /* In SQL expression --- special case */ } IdentifierLookup; extern IdentifierLookup plpgsql_IdentifierLookup; extern int plpgsql_variable_conflict; extern bool plpgsql_check_syntax; extern bool plpgsql_DumpExecTree; extern PLpgSQL_stmt_block *plpgsql_parse_result; extern int plpgsql_nDatums; extern PLpgSQL_datum **plpgsql_Datums; extern char *plpgsql_error_funcname; extern PLpgSQL_function *plpgsql_curr_compile; extern MemoryContext compile_tmp_cxt; extern PLpgSQL_plugin **plugin_ptr; /********************************************************************** * Function declarations **********************************************************************/ /* ---------- * Functions in pl_comp.c * ---------- */ extern PLpgSQL_function *plpgsql_compile(FunctionCallInfo fcinfo, bool forValidator); extern PLpgSQL_function *plpgsql_compile_inline(char *proc_source); extern void plpgsql_parser_setup(struct ParseState *pstate, PLpgSQL_expr *expr); extern bool plpgsql_parse_word(char *word1, const char *yytxt, PLwdatum *wdatum, PLword *word); extern bool plpgsql_parse_dblword(char *word1, char *word2, PLwdatum *wdatum, PLcword *cword); extern bool plpgsql_parse_tripword(char *word1, char *word2, char *word3, PLwdatum *wdatum, PLcword *cword); extern PLpgSQL_type *plpgsql_parse_wordtype(char *ident); extern PLpgSQL_type *plpgsql_parse_cwordtype(List *idents); extern PLpgSQL_type *plpgsql_parse_wordrowtype(char *ident); extern PLpgSQL_type *plpgsql_parse_cwordrowtype(List *idents); extern PLpgSQL_type *plpgsql_build_datatype(Oid typeOid, int32 typmod, Oid collation); extern PLpgSQL_variable *plpgsql_build_variable(const char *refname, int lineno, PLpgSQL_type *dtype, bool add2namespace); extern PLpgSQL_rec *plpgsql_build_record(const char *refname, int lineno, bool add2namespace); extern int plpgsql_recognize_err_condition(const char *condname, bool allow_sqlstate); extern PLpgSQL_condition *plpgsql_parse_err_condition(char *condname); extern void plpgsql_adddatum(PLpgSQL_datum *new); extern int plpgsql_add_initdatums(int **varnos); extern void plpgsql_HashTableInit(void); /* ---------- * Functions in pl_handler.c * ---------- */ extern void _PG_init(void); extern Datum plpgsql_call_handler(PG_FUNCTION_ARGS); extern Datum plpgsql_inline_handler(PG_FUNCTION_ARGS); extern Datum plpgsql_validator(PG_FUNCTION_ARGS); /* ---------- * Functions in pl_exec.c * ---------- */ extern Datum plpgsql_exec_function(PLpgSQL_function *func, FunctionCallInfo fcinfo); extern HeapTuple plpgsql_exec_trigger(PLpgSQL_function *func, TriggerData *trigdata); extern void plpgsql_xact_cb(XactEvent event, void *arg); extern void plpgsql_subxact_cb(SubXactEvent event, SubTransactionId mySubid, SubTransactionId parentSubid, void *arg); extern Oid exec_get_datum_type(PLpgSQL_execstate *estate, PLpgSQL_datum *datum); extern void exec_get_datum_type_info(PLpgSQL_execstate *estate, PLpgSQL_datum *datum, Oid *typeid, int32 *typmod, Oid *collation); /* ---------- * Functions for namespace handling in pl_funcs.c * ---------- */ extern void plpgsql_ns_init(void); extern void plpgsql_ns_push(const char *label); extern void plpgsql_ns_pop(void); extern PLpgSQL_nsitem *plpgsql_ns_top(void); extern void plpgsql_ns_additem(int itemtype, int itemno, const char *name); extern PLpgSQL_nsitem *plpgsql_ns_lookup(PLpgSQL_nsitem *ns_cur, bool localmode, const char *name1, const char *name2, const char *name3, int *names_used); extern PLpgSQL_nsitem *plpgsql_ns_lookup_label(PLpgSQL_nsitem *ns_cur, const char *name); /* ---------- * Other functions in pl_funcs.c * ---------- */ extern const char *plpgsql_stmt_typename(PLpgSQL_stmt *stmt); extern const char *plpgsql_getdiag_kindname(int kind); extern void plpgsql_free_function_memory(PLpgSQL_function *func); extern void plpgsql_dumptree(PLpgSQL_function *func); /* ---------- * Scanner functions in pl_scanner.c * ---------- */ extern int plpgsql_base_yylex(void); extern int plpgsql_yylex(void); extern void plpgsql_push_back_token(int token); extern void plpgsql_append_source_text(StringInfo buf, int startlocation, int endlocation); extern void plpgsql_peek2(int *tok1_p, int *tok2_p, int *tok1_loc, int *tok2_loc); extern int plpgsql_scanner_errposition(int location); extern void plpgsql_yyerror(const char *message); extern int plpgsql_location_to_lineno(int location); extern int plpgsql_latest_lineno(void); extern void plpgsql_scanner_init(const char *str); extern void plpgsql_scanner_finish(void); /* ---------- * Externs in gram.y * ---------- */ extern int plpgsql_yyparse(void); #endif /* PLPGSQL_H */