greenplumn pl_funcs 源码
greenplumn pl_funcs 代码
文件路径：/src/pl/plpgsql/src/pl_funcs.c
/*-------------------------------------------------------------------------
*
* pl_funcs.c - Misc functions for the PL/pgSQL
* procedural language
*
* Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* src/pl/plpgsql/src/pl_funcs.c
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "utils/memutils.h"
#include "plpgsql.h"
/* ----------
* Local variables for namespace handling
*
* The namespace structure actually forms a tree, of which only one linear
* list or "chain" (from the youngest item to the root) is accessible from
* any one plpgsql statement. During initial parsing of a function, ns_top
* points to the youngest item accessible from the block currently being
* parsed. We store the entire tree, however, since at runtime we will need
* to access the chain that's relevant to any one statement.
*
* Block boundaries in the namespace chain are marked by PLPGSQL_NSTYPE_LABEL
* items.
* ----------
*/
static PLpgSQL_nsitem *ns_top = NULL;
/* ----------
* plpgsql_ns_init Initialize namespace processing for a new function
* ----------
*/
void
plpgsql_ns_init(void)
{
ns_top = NULL;
}
/* ----------
* plpgsql_ns_push Create a new namespace level
* ----------
*/
void
plpgsql_ns_push(const char *label, PLpgSQL_label_type label_type)
{
if (label == NULL)
label = "";
plpgsql_ns_additem(PLPGSQL_NSTYPE_LABEL, (int) label_type, label);
}
/* ----------
* plpgsql_ns_pop Pop entries back to (and including) the last label
* ----------
*/
void
plpgsql_ns_pop(void)
{
Assert(ns_top != NULL);
while (ns_top->itemtype != PLPGSQL_NSTYPE_LABEL)
ns_top = ns_top->prev;
ns_top = ns_top->prev;
}
/* ----------
* plpgsql_ns_top Fetch the current namespace chain end
* ----------
*/
PLpgSQL_nsitem *
plpgsql_ns_top(void)
{
return ns_top;
}
/* ----------
* plpgsql_ns_additem Add an item to the current namespace chain
* ----------
*/
void
plpgsql_ns_additem(PLpgSQL_nsitem_type itemtype, int itemno, const char *name)
{
PLpgSQL_nsitem *nse;
Assert(name != NULL);
/* first item added must be a label */
Assert(ns_top != NULL || itemtype == PLPGSQL_NSTYPE_LABEL);
nse = palloc(offsetof(PLpgSQL_nsitem, name) + strlen(name) + 1);
nse->itemtype = itemtype;
nse->itemno = itemno;
nse->prev = ns_top;
strcpy(nse->name, name);
ns_top = nse;
}
/* ----------
* plpgsql_ns_lookup Lookup an identifier in the given namespace chain
*
* Note that this only searches for variables, not labels.
*
* If localmode is true, only the topmost block level is searched.
*
* name1 must be non-NULL. Pass NULL for name2 and/or name3 if parsing a name
* with fewer than three components.
*
* If names_used isn't NULL, *names_used receives the number of names
* matched: 0 if no match, 1 if name1 matched an unqualified variable name,
* 2 if name1 and name2 matched a block label + variable name.
*
* Note that name3 is never directly matched to anything. However, if it
* isn't NULL, we will disregard qualified matches to scalar variables.
* Similarly, if name2 isn't NULL, we disregard unqualified matches to
* scalar variables.
* ----------
*/
PLpgSQL_nsitem *
plpgsql_ns_lookup(PLpgSQL_nsitem *ns_cur, bool localmode,
const char *name1, const char *name2, const char *name3,
int *names_used)
{
/* Outer loop iterates once per block level in the namespace chain */
while (ns_cur != NULL)
{
PLpgSQL_nsitem *nsitem;
/* Check this level for unqualified match to variable name */
for (nsitem = ns_cur;
nsitem->itemtype != PLPGSQL_NSTYPE_LABEL;
nsitem = nsitem->prev)
{
if (strcmp(nsitem->name, name1) == 0)
{
if (name2 == NULL ||
nsitem->itemtype != PLPGSQL_NSTYPE_VAR)
{
if (names_used)
*names_used = 1;
return nsitem;
}
}
}
/* Check this level for qualified match to variable name */
if (name2 != NULL &&
strcmp(nsitem->name, name1) == 0)
{
for (nsitem = ns_cur;
nsitem->itemtype != PLPGSQL_NSTYPE_LABEL;
nsitem = nsitem->prev)
{
if (strcmp(nsitem->name, name2) == 0)
{
if (name3 == NULL ||
nsitem->itemtype != PLPGSQL_NSTYPE_VAR)
{
if (names_used)
*names_used = 2;
return nsitem;
}
}
}
}
if (localmode)
break; /* do not look into upper levels */
ns_cur = nsitem->prev;
}
/* This is just to suppress possibly-uninitialized-variable warnings */
if (names_used)
*names_used = 0;
return NULL; /* No match found */
}
/* ----------
* plpgsql_ns_lookup_label Lookup a label in the given namespace chain
* ----------
*/
PLpgSQL_nsitem *
plpgsql_ns_lookup_label(PLpgSQL_nsitem *ns_cur, const char *name)
{
while (ns_cur != NULL)
{
if (ns_cur->itemtype == PLPGSQL_NSTYPE_LABEL &&
strcmp(ns_cur->name, name) == 0)
return ns_cur;
ns_cur = ns_cur->prev;
}
return NULL; /* label not found */
}
/* ----------
* plpgsql_ns_find_nearest_loop Find innermost loop label in namespace chain
* ----------
*/
PLpgSQL_nsitem *
plpgsql_ns_find_nearest_loop(PLpgSQL_nsitem *ns_cur)
{
while (ns_cur != NULL)
{
if (ns_cur->itemtype == PLPGSQL_NSTYPE_LABEL &&
ns_cur->itemno == PLPGSQL_LABEL_LOOP)
return ns_cur;
ns_cur = ns_cur->prev;
}
return NULL; /* no loop found */
}
/*
* Statement type as a string, for use in error messages etc.
*/
const char *
plpgsql_stmt_typename(PLpgSQL_stmt *stmt)
{
switch (stmt->cmd_type)
{
case PLPGSQL_STMT_BLOCK:
return _("statement block");
case PLPGSQL_STMT_ASSIGN:
return _("assignment");
case PLPGSQL_STMT_IF:
return "IF";
case PLPGSQL_STMT_CASE:
return "CASE";
case PLPGSQL_STMT_LOOP:
return "LOOP";
case PLPGSQL_STMT_WHILE:
return "WHILE";
case PLPGSQL_STMT_FORI:
return _("FOR with integer loop variable");
case PLPGSQL_STMT_FORS:
return _("FOR over SELECT rows");
case PLPGSQL_STMT_FORC:
return _("FOR over cursor");
case PLPGSQL_STMT_FOREACH_A:
return _("FOREACH over array");
case PLPGSQL_STMT_EXIT:
return ((PLpgSQL_stmt_exit *) stmt)->is_exit ? "EXIT" : "CONTINUE";
case PLPGSQL_STMT_RETURN:
return "RETURN";
case PLPGSQL_STMT_RETURN_NEXT:
return "RETURN NEXT";
case PLPGSQL_STMT_RETURN_QUERY:
return "RETURN QUERY";
case PLPGSQL_STMT_RAISE:
return "RAISE";
case PLPGSQL_STMT_ASSERT:
return "ASSERT";
case PLPGSQL_STMT_EXECSQL:
return _("SQL statement");
case PLPGSQL_STMT_DYNEXECUTE:
return "EXECUTE";
case PLPGSQL_STMT_DYNFORS:
return _("FOR over EXECUTE statement");
case PLPGSQL_STMT_GETDIAG:
return ((PLpgSQL_stmt_getdiag *) stmt)->is_stacked ?
"GET STACKED DIAGNOSTICS" : "GET DIAGNOSTICS";
case PLPGSQL_STMT_OPEN:
return "OPEN";
case PLPGSQL_STMT_FETCH:
return ((PLpgSQL_stmt_fetch *) stmt)->is_move ? "MOVE" : "FETCH";
case PLPGSQL_STMT_CLOSE:
return "CLOSE";
case PLPGSQL_STMT_PERFORM:
return "PERFORM";
case PLPGSQL_STMT_CALL:
return ((PLpgSQL_stmt_call *) stmt)->is_call ? "CALL" : "DO";
case PLPGSQL_STMT_COMMIT:
return "COMMIT";
case PLPGSQL_STMT_ROLLBACK:
return "ROLLBACK";
case PLPGSQL_STMT_SET:
return "SET";
}
return "unknown";
}
/*
* GET DIAGNOSTICS item name as a string, for use in error messages etc.
*/
const char *
plpgsql_getdiag_kindname(PLpgSQL_getdiag_kind kind)
{
switch (kind)
{
case PLPGSQL_GETDIAG_ROW_COUNT:
return "ROW_COUNT";
case PLPGSQL_GETDIAG_CONTEXT:
return "PG_CONTEXT";
case PLPGSQL_GETDIAG_ERROR_CONTEXT:
return "PG_EXCEPTION_CONTEXT";
case PLPGSQL_GETDIAG_ERROR_DETAIL:
return "PG_EXCEPTION_DETAIL";
case PLPGSQL_GETDIAG_ERROR_HINT:
return "PG_EXCEPTION_HINT";
case PLPGSQL_GETDIAG_RETURNED_SQLSTATE:
return "RETURNED_SQLSTATE";
case PLPGSQL_GETDIAG_COLUMN_NAME:
return "COLUMN_NAME";
case PLPGSQL_GETDIAG_CONSTRAINT_NAME:
return "CONSTRAINT_NAME";
case PLPGSQL_GETDIAG_DATATYPE_NAME:
return "PG_DATATYPE_NAME";
case PLPGSQL_GETDIAG_MESSAGE_TEXT:
return "MESSAGE_TEXT";
case PLPGSQL_GETDIAG_TABLE_NAME:
return "TABLE_NAME";
case PLPGSQL_GETDIAG_SCHEMA_NAME:
return "SCHEMA_NAME";
}
return "unknown";
}
/**********************************************************************
* Release memory when a PL/pgSQL function is no longer needed
*
* The code for recursing through the function tree is really only
* needed to locate PLpgSQL_expr nodes, which may contain references
* to saved SPI Plans that must be freed. The function tree itself,
* along with subsidiary data, is freed in one swoop by freeing the
* function's permanent memory context.
**********************************************************************/
static void free_stmt(PLpgSQL_stmt *stmt);
static void free_block(PLpgSQL_stmt_block *block);
static void free_assign(PLpgSQL_stmt_assign *stmt);
static void free_if(PLpgSQL_stmt_if *stmt);
static void free_case(PLpgSQL_stmt_case *stmt);
static void free_loop(PLpgSQL_stmt_loop *stmt);
static void free_while(PLpgSQL_stmt_while *stmt);
static void free_fori(PLpgSQL_stmt_fori *stmt);
static void free_fors(PLpgSQL_stmt_fors *stmt);
static void free_forc(PLpgSQL_stmt_forc *stmt);
static void free_foreach_a(PLpgSQL_stmt_foreach_a *stmt);
static void free_exit(PLpgSQL_stmt_exit *stmt);
static void free_return(PLpgSQL_stmt_return *stmt);
static void free_return_next(PLpgSQL_stmt_return_next *stmt);
static void free_return_query(PLpgSQL_stmt_return_query *stmt);
static void free_raise(PLpgSQL_stmt_raise *stmt);
static void free_assert(PLpgSQL_stmt_assert *stmt);
static void free_execsql(PLpgSQL_stmt_execsql *stmt);
static void free_dynexecute(PLpgSQL_stmt_dynexecute *stmt);
static void free_dynfors(PLpgSQL_stmt_dynfors *stmt);
static void free_getdiag(PLpgSQL_stmt_getdiag *stmt);
static void free_open(PLpgSQL_stmt_open *stmt);
static void free_fetch(PLpgSQL_stmt_fetch *stmt);
static void free_close(PLpgSQL_stmt_close *stmt);
static void free_perform(PLpgSQL_stmt_perform *stmt);
static void free_call(PLpgSQL_stmt_call *stmt);
static void free_commit(PLpgSQL_stmt_commit *stmt);
static void free_rollback(PLpgSQL_stmt_rollback *stmt);
static void free_set(PLpgSQL_stmt_set *stmt);
static void free_expr(PLpgSQL_expr *expr);
static void
free_stmt(PLpgSQL_stmt *stmt)
{
switch (stmt->cmd_type)
{
case PLPGSQL_STMT_BLOCK:
free_block((PLpgSQL_stmt_block *) stmt);
break;
case PLPGSQL_STMT_ASSIGN:
free_assign((PLpgSQL_stmt_assign *) stmt);
break;
case PLPGSQL_STMT_IF:
free_if((PLpgSQL_stmt_if *) stmt);
break;
case PLPGSQL_STMT_CASE:
free_case((PLpgSQL_stmt_case *) stmt);
break;
case PLPGSQL_STMT_LOOP:
free_loop((PLpgSQL_stmt_loop *) stmt);
break;
case PLPGSQL_STMT_WHILE:
free_while((PLpgSQL_stmt_while *) stmt);
break;
case PLPGSQL_STMT_FORI:
free_fori((PLpgSQL_stmt_fori *) stmt);
break;
case PLPGSQL_STMT_FORS:
free_fors((PLpgSQL_stmt_fors *) stmt);
break;
case PLPGSQL_STMT_FORC:
free_forc((PLpgSQL_stmt_forc *) stmt);
break;
case PLPGSQL_STMT_FOREACH_A:
free_foreach_a((PLpgSQL_stmt_foreach_a *) stmt);
break;
case PLPGSQL_STMT_EXIT:
free_exit((PLpgSQL_stmt_exit *) stmt);
break;
case PLPGSQL_STMT_RETURN:
free_return((PLpgSQL_stmt_return *) stmt);
break;
case PLPGSQL_STMT_RETURN_NEXT:
free_return_next((PLpgSQL_stmt_return_next *) stmt);
break;
case PLPGSQL_STMT_RETURN_QUERY:
free_return_query((PLpgSQL_stmt_return_query *) stmt);
break;
case PLPGSQL_STMT_RAISE:
free_raise((PLpgSQL_stmt_raise *) stmt);
break;
case PLPGSQL_STMT_ASSERT:
free_assert((PLpgSQL_stmt_assert *) stmt);
break;
case PLPGSQL_STMT_EXECSQL:
free_execsql((PLpgSQL_stmt_execsql *) stmt);
break;
case PLPGSQL_STMT_DYNEXECUTE:
free_dynexecute((PLpgSQL_stmt_dynexecute *) stmt);
break;
case PLPGSQL_STMT_DYNFORS:
free_dynfors((PLpgSQL_stmt_dynfors *) stmt);
break;
case PLPGSQL_STMT_GETDIAG:
free_getdiag((PLpgSQL_stmt_getdiag *) stmt);
break;
case PLPGSQL_STMT_OPEN:
free_open((PLpgSQL_stmt_open *) stmt);
break;
case PLPGSQL_STMT_FETCH:
free_fetch((PLpgSQL_stmt_fetch *) stmt);
break;
case PLPGSQL_STMT_CLOSE:
free_close((PLpgSQL_stmt_close *) stmt);
break;
case PLPGSQL_STMT_PERFORM:
free_perform((PLpgSQL_stmt_perform *) stmt);
break;
case PLPGSQL_STMT_CALL:
free_call((PLpgSQL_stmt_call *) stmt);
break;
case PLPGSQL_STMT_COMMIT:
free_commit((PLpgSQL_stmt_commit *) stmt);
break;
case PLPGSQL_STMT_ROLLBACK:
free_rollback((PLpgSQL_stmt_rollback *) stmt);
break;
case PLPGSQL_STMT_SET:
free_set((PLpgSQL_stmt_set *) stmt);
break;
default:
elog(ERROR, "unrecognized cmd_type: %d", stmt->cmd_type);
break;
}
}
static void
free_stmts(List *stmts)
{
ListCell *s;
foreach(s, stmts)
{
free_stmt((PLpgSQL_stmt *) lfirst(s));
}
}
static void
free_block(PLpgSQL_stmt_block *block)
{
free_stmts(block->body);
if (block->exceptions)
{
ListCell *e;
foreach(e, block->exceptions->exc_list)
{
PLpgSQL_exception *exc = (PLpgSQL_exception *) lfirst(e);
free_stmts(exc->action);
}
}
}
static void
free_assign(PLpgSQL_stmt_assign *stmt)
{
free_expr(stmt->expr);
}
static void
free_if(PLpgSQL_stmt_if *stmt)
{
ListCell *l;
free_expr(stmt->cond);
free_stmts(stmt->then_body);
foreach(l, stmt->elsif_list)
{
PLpgSQL_if_elsif *elif = (PLpgSQL_if_elsif *) lfirst(l);
free_expr(elif->cond);
free_stmts(elif->stmts);
}
free_stmts(stmt->else_body);
}
static void
free_case(PLpgSQL_stmt_case *stmt)
{
ListCell *l;
free_expr(stmt->t_expr);
foreach(l, stmt->case_when_list)
{
PLpgSQL_case_when *cwt = (PLpgSQL_case_when *) lfirst(l);
free_expr(cwt->expr);
free_stmts(cwt->stmts);
}
free_stmts(stmt->else_stmts);
}
static void
free_loop(PLpgSQL_stmt_loop *stmt)
{
free_stmts(stmt->body);
}
static void
free_while(PLpgSQL_stmt_while *stmt)
{
free_expr(stmt->cond);
free_stmts(stmt->body);
}
static void
free_fori(PLpgSQL_stmt_fori *stmt)
{
free_expr(stmt->lower);
free_expr(stmt->upper);
free_expr(stmt->step);
free_stmts(stmt->body);
}
static void
free_fors(PLpgSQL_stmt_fors *stmt)
{
free_stmts(stmt->body);
free_expr(stmt->query);
}
static void
free_forc(PLpgSQL_stmt_forc *stmt)
{
free_stmts(stmt->body);
free_expr(stmt->argquery);
}
static void
free_foreach_a(PLpgSQL_stmt_foreach_a *stmt)
{
free_expr(stmt->expr);
free_stmts(stmt->body);
}
static void
free_open(PLpgSQL_stmt_open *stmt)
{
ListCell *lc;
free_expr(stmt->argquery);
free_expr(stmt->query);
free_expr(stmt->dynquery);
foreach(lc, stmt->params)
{
free_expr((PLpgSQL_expr *) lfirst(lc));
}
}
static void
free_fetch(PLpgSQL_stmt_fetch *stmt)
{
free_expr(stmt->expr);
}
static void
free_close(PLpgSQL_stmt_close *stmt)
{
}
static void
free_perform(PLpgSQL_stmt_perform *stmt)
{
free_expr(stmt->expr);
}
static void
free_call(PLpgSQL_stmt_call *stmt)
{
free_expr(stmt->expr);
}
static void
free_commit(PLpgSQL_stmt_commit *stmt)
{
}
static void
free_rollback(PLpgSQL_stmt_rollback *stmt)
{
}
static void
free_set(PLpgSQL_stmt_set *stmt)
{
free_expr(stmt->expr);
}
static void
free_exit(PLpgSQL_stmt_exit *stmt)
{
free_expr(stmt->cond);
}
static void
free_return(PLpgSQL_stmt_return *stmt)
{
free_expr(stmt->expr);
}
static void
free_return_next(PLpgSQL_stmt_return_next *stmt)
{
free_expr(stmt->expr);
}
static void
free_return_query(PLpgSQL_stmt_return_query *stmt)
{
ListCell *lc;
free_expr(stmt->query);
free_expr(stmt->dynquery);
foreach(lc, stmt->params)
{
free_expr((PLpgSQL_expr *) lfirst(lc));
}
}
static void
free_raise(PLpgSQL_stmt_raise *stmt)
{
ListCell *lc;
foreach(lc, stmt->params)
{
free_expr((PLpgSQL_expr *) lfirst(lc));
}
foreach(lc, stmt->options)
{
PLpgSQL_raise_option *opt = (PLpgSQL_raise_option *) lfirst(lc);
free_expr(opt->expr);
}
}
static void
free_assert(PLpgSQL_stmt_assert *stmt)
{
free_expr(stmt->cond);
free_expr(stmt->message);
}
static void
free_execsql(PLpgSQL_stmt_execsql *stmt)
{
free_expr(stmt->sqlstmt);
}
static void
free_dynexecute(PLpgSQL_stmt_dynexecute *stmt)
{
ListCell *lc;
free_expr(stmt->query);
foreach(lc, stmt->params)
{
free_expr((PLpgSQL_expr *) lfirst(lc));
}
}
static void
free_dynfors(PLpgSQL_stmt_dynfors *stmt)
{
ListCell *lc;
free_stmts(stmt->body);
free_expr(stmt->query);
foreach(lc, stmt->params)
{
free_expr((PLpgSQL_expr *) lfirst(lc));
}
}
static void
free_getdiag(PLpgSQL_stmt_getdiag *stmt)
{
}
static void
free_expr(PLpgSQL_expr *expr)
{
if (expr && expr->plan)
{
SPI_freeplan(expr->plan);
expr->plan = NULL;
}
}
void
plpgsql_free_function_memory(PLpgSQL_function *func)
{
int i;
/* Better not call this on an in-use function */
Assert(func->use_count == 0);
/* Release plans associated with variable declarations */
for (i = 0; i < func->ndatums; i++)
{
PLpgSQL_datum *d = func->datums[i];
switch (d->dtype)
{
case PLPGSQL_DTYPE_VAR:
case PLPGSQL_DTYPE_PROMISE:
{
PLpgSQL_var *var = (PLpgSQL_var *) d;
free_expr(var->default_val);
free_expr(var->cursor_explicit_expr);
}
break;
case PLPGSQL_DTYPE_ROW:
break;
case PLPGSQL_DTYPE_REC:
{
PLpgSQL_rec *rec = (PLpgSQL_rec *) d;
free_expr(rec->default_val);
}
break;
case PLPGSQL_DTYPE_RECFIELD:
break;
case PLPGSQL_DTYPE_ARRAYELEM:
free_expr(((PLpgSQL_arrayelem *) d)->subscript);
break;
default:
elog(ERROR, "unrecognized data type: %d", d->dtype);
}
}
func->ndatums = 0;
/* Release plans in statement tree */
if (func->action)
free_block(func->action);
func->action = NULL;
/*
* And finally, release all memory except the PLpgSQL_function struct
* itself (which has to be kept around because there may be multiple
* fn_extra pointers to it).
*/
if (func->fn_cxt)
MemoryContextDelete(func->fn_cxt);
func->fn_cxt = NULL;
}
/**********************************************************************
* Debug functions for analyzing the compiled code
**********************************************************************/
static int dump_indent;
static void dump_ind(void);
static void dump_stmt(PLpgSQL_stmt *stmt);
static void dump_block(PLpgSQL_stmt_block *block);
static void dump_assign(PLpgSQL_stmt_assign *stmt);
static void dump_if(PLpgSQL_stmt_if *stmt);
static void dump_case(PLpgSQL_stmt_case *stmt);
static void dump_loop(PLpgSQL_stmt_loop *stmt);
static void dump_while(PLpgSQL_stmt_while *stmt);
static void dump_fori(PLpgSQL_stmt_fori *stmt);
static void dump_fors(PLpgSQL_stmt_fors *stmt);
static void dump_forc(PLpgSQL_stmt_forc *stmt);
static void dump_foreach_a(PLpgSQL_stmt_foreach_a *stmt);
static void dump_exit(PLpgSQL_stmt_exit *stmt);
static void dump_return(PLpgSQL_stmt_return *stmt);
static void dump_return_next(PLpgSQL_stmt_return_next *stmt);
static void dump_return_query(PLpgSQL_stmt_return_query *stmt);
static void dump_raise(PLpgSQL_stmt_raise *stmt);
static void dump_assert(PLpgSQL_stmt_assert *stmt);
static void dump_execsql(PLpgSQL_stmt_execsql *stmt);
static void dump_dynexecute(PLpgSQL_stmt_dynexecute *stmt);
static void dump_dynfors(PLpgSQL_stmt_dynfors *stmt);
static void dump_getdiag(PLpgSQL_stmt_getdiag *stmt);
static void dump_open(PLpgSQL_stmt_open *stmt);
static void dump_fetch(PLpgSQL_stmt_fetch *stmt);
static void dump_cursor_direction(PLpgSQL_stmt_fetch *stmt);
static void dump_close(PLpgSQL_stmt_close *stmt);
static void dump_perform(PLpgSQL_stmt_perform *stmt);
static void dump_call(PLpgSQL_stmt_call *stmt);
static void dump_commit(PLpgSQL_stmt_commit *stmt);
static void dump_rollback(PLpgSQL_stmt_rollback *stmt);
static void dump_set(PLpgSQL_stmt_set *stmt);
static void dump_expr(PLpgSQL_expr *expr);
static void
dump_ind(void)
{
int i;
for (i = 0; i < dump_indent; i++)
printf(" ");
}
static void
dump_stmt(PLpgSQL_stmt *stmt)
{
printf("%3d:", stmt->lineno);
switch (stmt->cmd_type)
{
case PLPGSQL_STMT_BLOCK:
dump_block((PLpgSQL_stmt_block *) stmt);
break;
case PLPGSQL_STMT_ASSIGN:
dump_assign((PLpgSQL_stmt_assign *) stmt);
break;
case PLPGSQL_STMT_IF:
dump_if((PLpgSQL_stmt_if *) stmt);
break;
case PLPGSQL_STMT_CASE:
dump_case((PLpgSQL_stmt_case *) stmt);
break;
case PLPGSQL_STMT_LOOP:
dump_loop((PLpgSQL_stmt_loop *) stmt);
break;
case PLPGSQL_STMT_WHILE:
dump_while((PLpgSQL_stmt_while *) stmt);
break;
case PLPGSQL_STMT_FORI:
dump_fori((PLpgSQL_stmt_fori *) stmt);
break;
case PLPGSQL_STMT_FORS:
dump_fors((PLpgSQL_stmt_fors *) stmt);
break;
case PLPGSQL_STMT_FORC:
dump_forc((PLpgSQL_stmt_forc *) stmt);
break;
case PLPGSQL_STMT_FOREACH_A:
dump_foreach_a((PLpgSQL_stmt_foreach_a *) stmt);
break;
case PLPGSQL_STMT_EXIT:
dump_exit((PLpgSQL_stmt_exit *) stmt);
break;
case PLPGSQL_STMT_RETURN:
dump_return((PLpgSQL_stmt_return *) stmt);
break;
case PLPGSQL_STMT_RETURN_NEXT:
dump_return_next((PLpgSQL_stmt_return_next *) stmt);
break;
case PLPGSQL_STMT_RETURN_QUERY:
dump_return_query((PLpgSQL_stmt_return_query *) stmt);
break;
case PLPGSQL_STMT_RAISE:
dump_raise((PLpgSQL_stmt_raise *) stmt);
break;
case PLPGSQL_STMT_ASSERT:
dump_assert((PLpgSQL_stmt_assert *) stmt);
break;
case PLPGSQL_STMT_EXECSQL:
dump_execsql((PLpgSQL_stmt_execsql *) stmt);
break;
case PLPGSQL_STMT_DYNEXECUTE:
dump_dynexecute((PLpgSQL_stmt_dynexecute *) stmt);
break;
case PLPGSQL_STMT_DYNFORS:
dump_dynfors((PLpgSQL_stmt_dynfors *) stmt);
break;
case PLPGSQL_STMT_GETDIAG:
dump_getdiag((PLpgSQL_stmt_getdiag *) stmt);
break;
case PLPGSQL_STMT_OPEN:
dump_open((PLpgSQL_stmt_open *) stmt);
break;
case PLPGSQL_STMT_FETCH:
dump_fetch((PLpgSQL_stmt_fetch *) stmt);
break;
case PLPGSQL_STMT_CLOSE:
dump_close((PLpgSQL_stmt_close *) stmt);
break;
case PLPGSQL_STMT_PERFORM:
dump_perform((PLpgSQL_stmt_perform *) stmt);
break;
case PLPGSQL_STMT_CALL:
dump_call((PLpgSQL_stmt_call *) stmt);
break;
case PLPGSQL_STMT_COMMIT:
dump_commit((PLpgSQL_stmt_commit *) stmt);
break;
case PLPGSQL_STMT_ROLLBACK:
dump_rollback((PLpgSQL_stmt_rollback *) stmt);
break;
case PLPGSQL_STMT_SET:
dump_set((PLpgSQL_stmt_set *) stmt);
break;
default:
elog(ERROR, "unrecognized cmd_type: %d", stmt->cmd_type);
break;
}
}
static void
dump_stmts(List *stmts)
{
ListCell *s;
dump_indent += 2;
foreach(s, stmts)
dump_stmt((PLpgSQL_stmt *) lfirst(s));
dump_indent -= 2;
}
static void
dump_block(PLpgSQL_stmt_block *block)
{
char *name;
if (block->label == NULL)
name = "*unnamed*";
else
name = block->label;
dump_ind();
printf("BLOCK <<%s>>\n", name);
dump_stmts(block->body);
if (block->exceptions)
{
ListCell *e;
foreach(e, block->exceptions->exc_list)
{
PLpgSQL_exception *exc = (PLpgSQL_exception *) lfirst(e);
PLpgSQL_condition *cond;
dump_ind();
printf(" EXCEPTION WHEN ");
for (cond = exc->conditions; cond; cond = cond->next)
{
if (cond != exc->conditions)
printf(" OR ");
printf("%s", cond->condname);
}
printf(" THEN\n");
dump_stmts(exc->action);
}
}
dump_ind();
printf(" END -- %s\n", name);
}
static void
dump_assign(PLpgSQL_stmt_assign *stmt)
{
dump_ind();
printf("ASSIGN var %d := ", stmt->varno);
dump_expr(stmt->expr);
printf("\n");
}
static void
dump_if(PLpgSQL_stmt_if *stmt)
{
ListCell *l;
dump_ind();
printf("IF ");
dump_expr(stmt->cond);
printf(" THEN\n");
dump_stmts(stmt->then_body);
foreach(l, stmt->elsif_list)
{
PLpgSQL_if_elsif *elif = (PLpgSQL_if_elsif *) lfirst(l);
dump_ind();
printf(" ELSIF ");
dump_expr(elif->cond);
printf(" THEN\n");
dump_stmts(elif->stmts);
}
if (stmt->else_body != NIL)
{
dump_ind();
printf(" ELSE\n");
dump_stmts(stmt->else_body);
}
dump_ind();
printf(" ENDIF\n");
}
static void
dump_case(PLpgSQL_stmt_case *stmt)
{
ListCell *l;
dump_ind();
printf("CASE %d ", stmt->t_varno);
if (stmt->t_expr)
dump_expr(stmt->t_expr);
printf("\n");
dump_indent += 6;
foreach(l, stmt->case_when_list)
{
PLpgSQL_case_when *cwt = (PLpgSQL_case_when *) lfirst(l);
dump_ind();
printf("WHEN ");
dump_expr(cwt->expr);
printf("\n");
dump_ind();
printf("THEN\n");
dump_indent += 2;
dump_stmts(cwt->stmts);
dump_indent -= 2;
}
if (stmt->have_else)
{
dump_ind();
printf("ELSE\n");
dump_indent += 2;
dump_stmts(stmt->else_stmts);
dump_indent -= 2;
}
dump_indent -= 6;
dump_ind();
printf(" ENDCASE\n");
}
static void
dump_loop(PLpgSQL_stmt_loop *stmt)
{
dump_ind();
printf("LOOP\n");
dump_stmts(stmt->body);
dump_ind();
printf(" ENDLOOP\n");
}
static void
dump_while(PLpgSQL_stmt_while *stmt)
{
dump_ind();
printf("WHILE ");
dump_expr(stmt->cond);
printf("\n");
dump_stmts(stmt->body);
dump_ind();
printf(" ENDWHILE\n");
}
static void
dump_fori(PLpgSQL_stmt_fori *stmt)
{
dump_ind();
printf("FORI %s %s\n", stmt->var->refname, (stmt->reverse) ? "REVERSE" : "NORMAL");
dump_indent += 2;
dump_ind();
printf(" lower = ");
dump_expr(stmt->lower);
printf("\n");
dump_ind();
printf(" upper = ");
dump_expr(stmt->upper);
printf("\n");
if (stmt->step)
{
dump_ind();
printf(" step = ");
dump_expr(stmt->step);
printf("\n");
}
dump_indent -= 2;
dump_stmts(stmt->body);
dump_ind();
printf(" ENDFORI\n");
}
static void
dump_fors(PLpgSQL_stmt_fors *stmt)
{
dump_ind();
printf("FORS %s ", stmt->var->refname);
dump_expr(stmt->query);
printf("\n");
dump_stmts(stmt->body);
dump_ind();
printf(" ENDFORS\n");
}
static void
dump_forc(PLpgSQL_stmt_forc *stmt)
{
dump_ind();
printf("FORC %s ", stmt->var->refname);
printf("curvar=%d\n", stmt->curvar);
dump_indent += 2;
if (stmt->argquery != NULL)
{
dump_ind();
printf(" arguments = ");
dump_expr(stmt->argquery);
printf("\n");
}
dump_indent -= 2;
dump_stmts(stmt->body);
dump_ind();
printf(" ENDFORC\n");
}
static void
dump_foreach_a(PLpgSQL_stmt_foreach_a *stmt)
{
dump_ind();
printf("FOREACHA var %d ", stmt->varno);
if (stmt->slice != 0)
printf("SLICE %d ", stmt->slice);
printf("IN ");
dump_expr(stmt->expr);
printf("\n");
dump_stmts(stmt->body);
dump_ind();
printf(" ENDFOREACHA");
}
static void
dump_open(PLpgSQL_stmt_open *stmt)
{
dump_ind();
printf("OPEN curvar=%d\n", stmt->curvar);
dump_indent += 2;
if (stmt->argquery != NULL)
{
dump_ind();
printf(" arguments = '");
dump_expr(stmt->argquery);
printf("'\n");
}
if (stmt->query != NULL)
{
dump_ind();
printf(" query = '");
dump_expr(stmt->query);
printf("'\n");
}
if (stmt->dynquery != NULL)
{
dump_ind();
printf(" execute = '");
dump_expr(stmt->dynquery);
printf("'\n");
if (stmt->params != NIL)
{
ListCell *lc;
int i;
dump_indent += 2;
dump_ind();
printf(" USING\n");
dump_indent += 2;
i = 1;
foreach(lc, stmt->params)
{
dump_ind();
printf(" parameter $%d: ", i++);
dump_expr((PLpgSQL_expr *) lfirst(lc));
printf("\n");
}
dump_indent -= 4;
}
}
dump_indent -= 2;
}
static void
dump_fetch(PLpgSQL_stmt_fetch *stmt)
{
dump_ind();
if (!stmt->is_move)
{
printf("FETCH curvar=%d\n", stmt->curvar);
dump_cursor_direction(stmt);
dump_indent += 2;
if (stmt->target != NULL)
{
dump_ind();
printf(" target = %d %s\n",
stmt->target->dno, stmt->target->refname);
}
dump_indent -= 2;
}
else
{
printf("MOVE curvar=%d\n", stmt->curvar);
dump_cursor_direction(stmt);
}
}
static void
dump_cursor_direction(PLpgSQL_stmt_fetch *stmt)
{
dump_indent += 2;
dump_ind();
switch (stmt->direction)
{
case FETCH_FORWARD:
printf(" FORWARD ");
break;
case FETCH_BACKWARD:
printf(" BACKWARD ");
break;
case FETCH_ABSOLUTE:
printf(" ABSOLUTE ");
break;
case FETCH_RELATIVE:
printf(" RELATIVE ");
break;
default:
printf("??? unknown cursor direction %d", stmt->direction);
}
if (stmt->expr)
{
dump_expr(stmt->expr);
printf("\n");
}
else
printf("%ld\n", stmt->how_many);
dump_indent -= 2;
}
static void
dump_close(PLpgSQL_stmt_close *stmt)
{
dump_ind();
printf("CLOSE curvar=%d\n", stmt->curvar);
}
static void
dump_perform(PLpgSQL_stmt_perform *stmt)
{
dump_ind();
printf("PERFORM expr = ");
dump_expr(stmt->expr);
printf("\n");
}
static void
dump_call(PLpgSQL_stmt_call *stmt)
{
dump_ind();
printf("%s expr = ", stmt->is_call ? "CALL" : "DO");
dump_expr(stmt->expr);
printf("\n");
}
static void
dump_commit(PLpgSQL_stmt_commit *stmt)
{
dump_ind();
if (stmt->chain)
printf("COMMIT AND CHAIN\n");
else
printf("COMMIT\n");
}
static void
dump_rollback(PLpgSQL_stmt_rollback *stmt)
{
dump_ind();
if (stmt->chain)
printf("ROLLBACK AND CHAIN\n");
else
printf("ROLLBACK\n");
}
static void
dump_set(PLpgSQL_stmt_set *stmt)
{
dump_ind();
printf("%s\n", stmt->expr->query);
}
static void
dump_exit(PLpgSQL_stmt_exit *stmt)
{
dump_ind();
printf("%s", stmt->is_exit ? "EXIT" : "CONTINUE");
if (stmt->label != NULL)
printf(" label='%s'", stmt->label);
if (stmt->cond != NULL)
{
printf(" WHEN ");
dump_expr(stmt->cond);
}
printf("\n");
}
static void
dump_return(PLpgSQL_stmt_return *stmt)
{
dump_ind();
printf("RETURN ");
if (stmt->retvarno >= 0)
printf("variable %d", stmt->retvarno);
else if (stmt->expr != NULL)
dump_expr(stmt->expr);
else
printf("NULL");
printf("\n");
}
static void
dump_return_next(PLpgSQL_stmt_return_next *stmt)
{
dump_ind();
printf("RETURN NEXT ");
if (stmt->retvarno >= 0)
printf("variable %d", stmt->retvarno);
else if (stmt->expr != NULL)
dump_expr(stmt->expr);
else
printf("NULL");
printf("\n");
}
static void
dump_return_query(PLpgSQL_stmt_return_query *stmt)
{
dump_ind();
if (stmt->query)
{
printf("RETURN QUERY ");
dump_expr(stmt->query);
printf("\n");
}
else
{
printf("RETURN QUERY EXECUTE ");
dump_expr(stmt->dynquery);
printf("\n");
if (stmt->params != NIL)
{
ListCell *lc;
int i;
dump_indent += 2;
dump_ind();
printf(" USING\n");
dump_indent += 2;
i = 1;
foreach(lc, stmt->params)
{
dump_ind();
printf(" parameter $%d: ", i++);
dump_expr((PLpgSQL_expr *) lfirst(lc));
printf("\n");
}
dump_indent -= 4;
}
}
}
static void
dump_raise(PLpgSQL_stmt_raise *stmt)
{
ListCell *lc;
int i = 0;
dump_ind();
printf("RAISE level=%d", stmt->elog_level);
if (stmt->condname)
printf(" condname='%s'", stmt->condname);
if (stmt->message)
printf(" message='%s'", stmt->message);
printf("\n");
dump_indent += 2;
foreach(lc, stmt->params)
{
dump_ind();
printf(" parameter %d: ", i++);
dump_expr((PLpgSQL_expr *) lfirst(lc));
printf("\n");
}
if (stmt->options)
{
dump_ind();
printf(" USING\n");
dump_indent += 2;
foreach(lc, stmt->options)
{
PLpgSQL_raise_option *opt = (PLpgSQL_raise_option *) lfirst(lc);
dump_ind();
switch (opt->opt_type)
{
case PLPGSQL_RAISEOPTION_ERRCODE:
printf(" ERRCODE = ");
break;
case PLPGSQL_RAISEOPTION_MESSAGE:
printf(" MESSAGE = ");
break;
case PLPGSQL_RAISEOPTION_DETAIL:
printf(" DETAIL = ");
break;
case PLPGSQL_RAISEOPTION_HINT:
printf(" HINT = ");
break;
case PLPGSQL_RAISEOPTION_COLUMN:
printf(" COLUMN = ");
break;
case PLPGSQL_RAISEOPTION_CONSTRAINT:
printf(" CONSTRAINT = ");
break;
case PLPGSQL_RAISEOPTION_DATATYPE:
printf(" DATATYPE = ");
break;
case PLPGSQL_RAISEOPTION_TABLE:
printf(" TABLE = ");
break;
case PLPGSQL_RAISEOPTION_SCHEMA:
printf(" SCHEMA = ");
break;
}
dump_expr(opt->expr);
printf("\n");
}
dump_indent -= 2;
}
dump_indent -= 2;
}
static void
dump_assert(PLpgSQL_stmt_assert *stmt)
{
dump_ind();
printf("ASSERT ");
dump_expr(stmt->cond);
printf("\n");
dump_indent += 2;
if (stmt->message != NULL)
{
dump_ind();
printf(" MESSAGE = ");
dump_expr(stmt->message);
printf("\n");
}
dump_indent -= 2;
}
static void
dump_execsql(PLpgSQL_stmt_execsql *stmt)
{
dump_ind();
printf("EXECSQL ");
dump_expr(stmt->sqlstmt);
printf("\n");
dump_indent += 2;
if (stmt->target != NULL)
{
dump_ind();
printf(" INTO%s target = %d %s\n",
stmt->strict ? " STRICT" : "",
stmt->target->dno, stmt->target->refname);
}
dump_indent -= 2;
}
static void
dump_dynexecute(PLpgSQL_stmt_dynexecute *stmt)
{
dump_ind();
printf("EXECUTE ");
dump_expr(stmt->query);
printf("\n");
dump_indent += 2;
if (stmt->target != NULL)
{
dump_ind();
printf(" INTO%s target = %d %s\n",
stmt->strict ? " STRICT" : "",
stmt->target->dno, stmt->target->refname);
}
if (stmt->params != NIL)
{
ListCell *lc;
int i;
dump_ind();
printf(" USING\n");
dump_indent += 2;
i = 1;
foreach(lc, stmt->params)
{
dump_ind();
printf(" parameter %d: ", i++);
dump_expr((PLpgSQL_expr *) lfirst(lc));
printf("\n");
}
dump_indent -= 2;
}
dump_indent -= 2;
}
static void
dump_dynfors(PLpgSQL_stmt_dynfors *stmt)
{
dump_ind();
printf("FORS %s EXECUTE ", stmt->var->refname);
dump_expr(stmt->query);
printf("\n");
if (stmt->params != NIL)
{
ListCell *lc;
int i;
dump_indent += 2;
dump_ind();
printf(" USING\n");
dump_indent += 2;
i = 1;
foreach(lc, stmt->params)
{
dump_ind();
printf(" parameter $%d: ", i++);
dump_expr((PLpgSQL_expr *) lfirst(lc));
printf("\n");
}
dump_indent -= 4;
}
dump_stmts(stmt->body);
dump_ind();
printf(" ENDFORS\n");
}
static void
dump_getdiag(PLpgSQL_stmt_getdiag *stmt)
{
ListCell *lc;
dump_ind();
printf("GET %s DIAGNOSTICS ", stmt->is_stacked ? "STACKED" : "CURRENT");
foreach(lc, stmt->diag_items)
{
PLpgSQL_diag_item *diag_item = (PLpgSQL_diag_item *) lfirst(lc);
if (lc != list_head(stmt->diag_items))
printf(", ");
printf("{var %d} = %s", diag_item->target,
plpgsql_getdiag_kindname(diag_item->kind));
}
printf("\n");
}
static void
dump_expr(PLpgSQL_expr *expr)
{
printf("'%s'", expr->query);
}
void
plpgsql_dumptree(PLpgSQL_function *func)
{
int i;
PLpgSQL_datum *d;
printf("\nExecution tree of successfully compiled PL/pgSQL function %s:\n",
func->fn_signature);
printf("\nFunction's data area:\n");
for (i = 0; i < func->ndatums; i++)
{
d = func->datums[i];
printf(" entry %d: ", i);
switch (d->dtype)
{
case PLPGSQL_DTYPE_VAR:
case PLPGSQL_DTYPE_PROMISE:
{
PLpgSQL_var *var = (PLpgSQL_var *) d;
printf("VAR %-16s type %s (typoid %u) atttypmod %d\n",
var->refname, var->datatype->typname,
var->datatype->typoid,
var->datatype->atttypmod);
if (var->isconst)
printf(" CONSTANT\n");
if (var->notnull)
printf(" NOT NULL\n");
if (var->default_val != NULL)
{
printf(" DEFAULT ");
dump_expr(var->default_val);
printf("\n");
}
if (var->cursor_explicit_expr != NULL)
{
if (var->cursor_explicit_argrow >= 0)
printf(" CURSOR argument row %d\n", var->cursor_explicit_argrow);
printf(" CURSOR IS ");
dump_expr(var->cursor_explicit_expr);
printf("\n");
}
if (var->promise != PLPGSQL_PROMISE_NONE)
printf(" PROMISE %d\n",
(int) var->promise);
}
break;
case PLPGSQL_DTYPE_ROW:
{
PLpgSQL_row *row = (PLpgSQL_row *) d;
int i;
printf("ROW %-16s fields", row->refname);
for (i = 0; i < row->nfields; i++)
{
printf(" %s=var %d", row->fieldnames[i],
row->varnos[i]);
}
printf("\n");
}
break;
case PLPGSQL_DTYPE_REC:
printf("REC %-16s typoid %u\n",
((PLpgSQL_rec *) d)->refname,
((PLpgSQL_rec *) d)->rectypeid);
if (((PLpgSQL_rec *) d)->isconst)
printf(" CONSTANT\n");
if (((PLpgSQL_rec *) d)->notnull)
printf(" NOT NULL\n");
if (((PLpgSQL_rec *) d)->default_val != NULL)
{
printf(" DEFAULT ");
dump_expr(((PLpgSQL_rec *) d)->default_val);
printf("\n");
}
break;
case PLPGSQL_DTYPE_RECFIELD:
printf("RECFIELD %-16s of REC %d\n",
((PLpgSQL_recfield *) d)->fieldname,
((PLpgSQL_recfield *) d)->recparentno);
break;
case PLPGSQL_DTYPE_ARRAYELEM:
printf("ARRAYELEM of VAR %d subscript ",
((PLpgSQL_arrayelem *) d)->arrayparentno);
dump_expr(((PLpgSQL_arrayelem *) d)->subscript);
printf("\n");
break;
default:
printf("??? unknown data type %d\n", d->dtype);
}
}
printf("\nFunction's statements:\n");
dump_indent = 0;
printf("%3d:", func->action->lineno);
dump_block(func->action);
printf("\nEnd of execution tree of function %s\n\n", func->fn_signature);
fflush(stdout);
}
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