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/*-------------------------------------------------------------------------
*
* pltsql.h - Definitions for the PL/tsql
* procedural language
*
* Portions Copyright (c) 1996-2018, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* src/pl/pltsql/src/pltsql.h
*
*-------------------------------------------------------------------------
*/
#ifndef PLTSQL_H
#define PLTSQL_H
#include "postgres.h"
#include "access/xact.h"
#include "catalog/pg_collation.h"
#include "commands/defrem.h"
#include "parser/parse_func.h"
#include "commands/event_trigger.h"
#include "commands/sequence.h"
#include "commands/trigger.h"
#include "collation.h"
#include "executor/spi.h"
#include "libpq/libpq-be.h"
#include "optimizer/planner.h"
#include "utils/expandedrecord.h"
#include "utils/plancache.h"
#include "utils/portal.h"
#include "utils/typcache.h"
#include "dynavec.h"
#include "dynastack.h"
#include "../../contrib/babelfishpg_common/src/babelfishpg_common.h"
/**********************************************************************
* Definitions
**********************************************************************/
/* define our text domain for translations */
#undef TEXTDOMAIN
#define TEXTDOMAIN PG_TEXTDOMAIN("pltsql")
#undef _
#define _(x) dgettext(TEXTDOMAIN, x)
#define PLTSQL_INSTR_ENABLED() \
(pltsql_instr_plugin_ptr && (*pltsql_instr_plugin_ptr) && \
(*pltsql_instr_plugin_ptr)->pltsql_instr_increment_metric)
#define TSQLInstrumentation(metric) \
({ if ((pltsql_instr_plugin_ptr && (*pltsql_instr_plugin_ptr) && (*pltsql_instr_plugin_ptr)->pltsql_instr_increment_metric)) \
(*pltsql_instr_plugin_ptr)->pltsql_instr_increment_metric(metric); \
})
#define TSQL_TXN_NAME_LIMIT 64 /* Transaction name limit */
/* Max number of Args allowed for Prepared stmts. */
#define PREPARE_STMT_MAX_ARGS 2100
/*
* Compiler's namespace item types
*/
typedef enum PLtsql_nsitem_type
{
PLTSQL_NSTYPE_LABEL, /* block label */
PLTSQL_NSTYPE_VAR, /* scalar variable */
PLTSQL_NSTYPE_REC, /* composite variable */
PLTSQL_NSTYPE_TBL /* table variable */
} PLtsql_nsitem_type;
/*
* A PLTSQL_NSTYPE_LABEL stack entry must be one of these types
*/
typedef enum PLtsql_label_type
{
PLTSQL_LABEL_BLOCK, /* DECLARE/BEGIN block */
PLTSQL_LABEL_LOOP, /* looping construct */
PLTSQL_LABEL_OTHER /* anything else */
} PLtsql_label_type;
/*
* Datum array node types
*/
typedef enum PLtsql_datum_type
{
PLTSQL_DTYPE_VAR,
PLTSQL_DTYPE_ROW,
PLTSQL_DTYPE_REC,
PLTSQL_DTYPE_TBL,
PLTSQL_DTYPE_RECFIELD,
PLTSQL_DTYPE_ARRAYELEM,
PLTSQL_DTYPE_PROMISE
} PLtsql_datum_type;
/*
* DTYPE_PROMISE datums have these possible ways of computing the promise
*/
typedef enum PLtsql_promise_type
{
PLTSQL_PROMISE_NONE = 0, /* not a promise, or promise satisfied */
PLTSQL_PROMISE_TG_NAME,
PLTSQL_PROMISE_TG_WHEN,
PLTSQL_PROMISE_TG_LEVEL,
PLTSQL_PROMISE_TG_OP,
PLTSQL_PROMISE_TG_RELID,
PLTSQL_PROMISE_TG_TABLE_NAME,
PLTSQL_PROMISE_TG_TABLE_SCHEMA,
PLTSQL_PROMISE_TG_NARGS,
PLTSQL_PROMISE_TG_ARGV,
PLTSQL_PROMISE_TG_EVENT,
PLTSQL_PROMISE_TG_TAG
} PLtsql_promise_type;
/*
* Variants distinguished in PLtsql_type structs
*/
typedef enum PLtsql_type_type
{
PLTSQL_TTYPE_SCALAR, /* scalar types and domains */
PLTSQL_TTYPE_REC, /* composite types, including RECORD */
PLTSQL_TTYPE_PSEUDO, /* pseudotypes */
PLTSQL_TTYPE_TBL /* table types */
} PLtsql_type_type;
/*
* Execution tree node types
*/
typedef enum PLtsql_stmt_type
{
PLTSQL_STMT_BLOCK,
PLTSQL_STMT_ASSIGN,
PLTSQL_STMT_IF,
PLTSQL_STMT_CASE, /* PLPGSQL */
PLTSQL_STMT_LOOP, /* PLPGSQL */
PLTSQL_STMT_WHILE,
PLTSQL_STMT_FORI, /* PLPGSQL */
PLTSQL_STMT_FORS, /* PLPGSQL */
PLTSQL_STMT_FORC, /* PLPGSQL */
PLTSQL_STMT_FOREACH_A, /* PLPGSQL */
PLTSQL_STMT_EXIT,
PLTSQL_STMT_RETURN,
PLTSQL_STMT_RETURN_NEXT, /* PLPGSQL */
PLTSQL_STMT_RETURN_QUERY, /* PLPGSQL */
PLTSQL_STMT_RAISE, /* PLPGSQL */
PLTSQL_STMT_ASSERT, /* PLPGSQL */
PLTSQL_STMT_EXECSQL,
PLTSQL_STMT_DYNEXECUTE, /* PLPGSQL */
PLTSQL_STMT_DYNFORS, /* PLPGSQL */
PLTSQL_STMT_GETDIAG, /* PLPGSQL */
PLTSQL_STMT_OPEN,
PLTSQL_STMT_FETCH,
PLTSQL_STMT_CLOSE,
PLTSQL_STMT_PERFORM, /* PLPGSQL */
PLTSQL_STMT_CALL, /* PLPGSQL */
PLTSQL_STMT_COMMIT,
PLTSQL_STMT_ROLLBACK,
PLTSQL_STMT_SET, /* PLPGSQL */
/* TSQL-only statement types follow */
PLTSQL_STMT_GOTO,
PLTSQL_STMT_PRINT,
PLTSQL_STMT_INIT,
PLTSQL_STMT_QUERY_SET,
PLTSQL_STMT_TRY_CATCH,
PLTSQL_STMT_PUSH_RESULT,
PLTSQL_STMT_EXEC,
PLTSQL_STMT_EXEC_BATCH,
PLTSQL_STMT_EXEC_SP,
PLTSQL_STMT_DECL_TABLE,
PLTSQL_STMT_RETURN_TABLE,
PLTSQL_STMT_DEALLOCATE,
PLTSQL_STMT_DECL_CURSOR,
PLTSQL_STMT_LABEL,
PLTSQL_STMT_RAISERROR,
PLTSQL_STMT_THROW,
PLTSQL_STMT_USEDB,
PLTSQL_STMT_SET_EXPLAIN_MODE,
/* TSQL-only executable node */
PLTSQL_STMT_SAVE_CTX,
PLTSQL_STMT_RESTORE_CTX_FULL,
PLTSQL_STMT_RESTORE_CTX_PARTIAL,
PLTSQL_STMT_INSERT_BULK,
PLTSQL_STMT_GRANTDB
} PLtsql_stmt_type;
/*
* Execution node return codes
*/
enum
{
PLTSQL_RC_OK,
PLTSQL_RC_EXIT,
PLTSQL_RC_RETURN,
PLTSQL_RC_CONTINUE
};
/*
* GET DIAGNOSTICS information items
*/
typedef enum PLtsql_getdiag_kind
{
PLTSQL_GETDIAG_ROW_COUNT,
PLTSQL_GETDIAG_RESULT_OID,
PLTSQL_GETDIAG_CONTEXT,
PLTSQL_GETDIAG_ERROR_CONTEXT,
PLTSQL_GETDIAG_ERROR_DETAIL,
PLTSQL_GETDIAG_ERROR_HINT,
PLTSQL_GETDIAG_RETURNED_SQLSTATE,
PLTSQL_GETDIAG_COLUMN_NAME,
PLTSQL_GETDIAG_CONSTRAINT_NAME,
PLTSQL_GETDIAG_DATATYPE_NAME,
PLTSQL_GETDIAG_MESSAGE_TEXT,
PLTSQL_GETDIAG_TABLE_NAME,
PLTSQL_GETDIAG_SCHEMA_NAME
} PLtsql_getdiag_kind;
/*
* RAISE statement options
*/
typedef enum PLtsql_raise_option_type
{
PLTSQL_RAISEOPTION_ERRCODE,
PLTSQL_RAISEOPTION_MESSAGE,
PLTSQL_RAISEOPTION_DETAIL,
PLTSQL_RAISEOPTION_HINT,
PLTSQL_RAISEOPTION_COLUMN,
PLTSQL_RAISEOPTION_CONSTRAINT,
PLTSQL_RAISEOPTION_DATATYPE,
PLTSQL_RAISEOPTION_TABLE,
PLTSQL_RAISEOPTION_SCHEMA
} PLtsql_raise_option_type;
/*
* Behavioral modes for pltsql variable resolution
*/
typedef enum PLtsql_resolve_option
{
PLTSQL_RESOLVE_ERROR, /* throw error if ambiguous */
PLTSQL_RESOLVE_VARIABLE, /* prefer pltsql var to table column */
PLTSQL_RESOLVE_COLUMN /* prefer table column to pltsql var */
} PLtsql_resolve_option;
/*
* Schema mapping for pltsql databases
*/
typedef enum PLtsql_schema_mapping
{
PLTSQL_DB_SCHEMA,
PLTSQL_DB,
PLTSQL_SCHEMA
} PLtsql_schema_mapping;
#define TSQL_TRIGGER_STARTED 0x1
#define TSQL_TRAN_STARTED 0x2
/**********************************************************************
* Node and structure definitions
**********************************************************************/
/*
* Postgres data type
*/
typedef struct PLtsql_type
{
char *typname; /* (simple) name of the type */
Oid typoid; /* OID of the data type */
PLtsql_type_type ttype; /* PLTSQL_TTYPE_ code */
int16 typlen; /* stuff copied from its pg_type entry */
bool typbyval;
char typtype;
Oid collation; /* from pg_type, but can be overridden */
bool typisarray; /* is "true" array, or domain over one */
int32 atttypmod; /* typmod (taken from someplace else) */
/*
* This field is only used when a table variable does not have a
* pre-defined type, e.g. DECLARE @tableVar TABLE (a int, b int)
*/
char *coldef;
/*
* Remaining fields are used only for named composite types (not RECORD)
* and table types
*/
TypeName *origtypname; /* type name as written by user */
TypeCacheEntry *tcache; /* typcache entry for composite type */
uint64 tupdesc_id; /* last-seen tupdesc identifier */
} PLtsql_type;
/*
* SQL Query to plan and execute
*/
typedef struct PLtsql_expr
{
char *query;
SPIPlanPtr plan;
Bitmapset *paramnos; /* all dnos referenced by this query */
int rwparam; /* dno of read/write param, or -1 if none */
/* function containing this expr (not set until we first parse query) */
struct PLtsql_function *func;
/* namespace chain visible to this expr */
struct PLtsql_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 */
int32 expr_simple_typmod; /* result typmod, if simple */
bool expr_simple_mutable; /* true if simple expr is mutable */
/*
* 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;
/* here for itvf? queries with all idents replaced with NULLs */
char *itvf_query;
//make sure always set to NULL
} PLtsql_expr;
/*
* Generic datum array item
*
* PLtsql_datum is the common supertype for PLtsql_var, PLtsql_row,
* PLtsql_rec, PLtsql_recfield, and PLtsql_arrayelem.
*/
typedef struct PLtsql_datum
{
PLtsql_datum_type dtype;
int dno;
} PLtsql_datum;
/*
* Scalar or composite variable
*
* The variants PLtsql_var, PLtsql_row, and PLtsql_rec share these
* fields.
*/
typedef struct PLtsql_variable
{
PLtsql_datum_type dtype;
int dno;
char *refname;
int lineno;
bool isconst;
bool notnull;
PLtsql_expr *default_val;
} PLtsql_variable;
/*
* Scalar variable
*
* DTYPE_VAR and DTYPE_PROMISE datums both use this struct type.
* A PROMISE datum works exactly like a VAR datum for most purposes,
* but if it is read without having previously been assigned to, then
* a special "promised" value is computed and assigned to the datum
* before the read is performed. This technique avoids the overhead of
* computing the variable's value in cases where we expect that many
* functions will never read it.
*/
typedef struct PLtsql_var
{
PLtsql_datum_type dtype;
int dno;
char *refname;
int lineno;
bool isconst;
bool notnull;
PLtsql_expr *default_val;
/* end of PLtsql_variable fields */
PLtsql_type *datatype;
/*
* Variables declared as CURSOR FOR <query> are mostly like ordinary
* scalar variables of type refcursor, but they have these additional
* properties:
*/
PLtsql_expr *cursor_explicit_expr;
int cursor_explicit_argrow;
int cursor_options;
/* Fields below here can change at runtime */
Datum value;
bool isnull;
bool freeval;
/*
* The promise field records which "promised" value to assign if the
* promise must be honored. If it's a normal variable, or the promise has
* been fulfilled, this is PLTSQL_PROMISE_NONE.
*/
PLtsql_promise_type promise;
} PLtsql_var;
/*
* Row variable - this represents one or more variables that are listed in an
* INTO clause, FOR-loop targetlist, cursor argument list, etc. We also use
* a row to represent a function's OUT parameters when there's more than one.
*
* Note that there's no way to name the row as such from PL/tsql code,
* so many functions don't need to support these.
*
* That also means that there's no real name for the row variable, so we
* conventionally set refname to "(unnamed row)". We could leave it NULL,
* but it's too convenient to be able to assume that refname is valid in
* all variants of PLtsql_variable.
*
* isconst, notnull, and default_val are unsupported (and hence
* always zero/null) for a row. The member variables of a row should have
* been checked to be writable at compile time, so isconst is correctly set
* to false. notnull and default_val aren't applicable.
*/
typedef struct PLtsql_row
{
PLtsql_datum_type dtype;
int dno;
char *refname;
int lineno;
bool isconst;
bool notnull;
PLtsql_expr *default_val;
/* end of PLtsql_variable fields */
/*
* rowtupdesc is only set up if we might need to convert the row into a
* composite datum, which currently only happens for OUT parameters.
* Otherwise it is NULL.
*/
TupleDesc rowtupdesc;
int nfields;
char **fieldnames;
int *varnos;
} PLtsql_row;
/*
* Record variable (any composite type, including RECORD)
*/
typedef struct PLtsql_rec
{
PLtsql_datum_type dtype;
int dno;
char *refname;
int lineno;
bool isconst;
bool notnull;
PLtsql_expr *default_val;
/* end of PLtsql_variable fields */
/*
* Note: for non-RECORD cases, we may from time to time re-look-up the
* composite type, using datatype->origtypname. That can result in
* changing rectypeid.
*/
PLtsql_type *datatype; /* can be NULL, if rectypeid is RECORDOID */
Oid rectypeid; /* declared type of variable */
/* RECFIELDs for this record are chained together for easy access */
int firstfield; /* dno of first RECFIELD, or -1 if none */
/* Fields below here can change at runtime */
/* We always store record variables as "expanded" records */
ExpandedRecordHeader *erh;
} PLtsql_rec;
/*
* Table variable
*/
typedef struct PLtsql_tbl
{
PLtsql_datum_type dtype;
int dno;
char *refname;
int lineno;
bool isconst;
bool notnull;
PLtsql_expr *default_val;
/* end of PLtsql_variable fields */
PLtsql_type *datatype;
Oid tbltypeid; /* declared type of variable */
char *tblname; /* name of the underlying table */
/*
* If a table variable is declared inside a function, then we need to drop
* its underlying table at the end of execution. If a table variable is
* passed in as a table-valued parameter, then we don't need to drop its
* underlying table - it's the caller's responsibility.
*/
bool need_drop;
} PLtsql_tbl;
/*
* Field in record
*/
typedef struct PLtsql_recfield
{
PLtsql_datum_type dtype;
int dno;
/* end of PLtsql_datum fields */
char *fieldname; /* name of field */
int recparentno; /* dno of parent record */
int nextfield; /* dno of next child, or -1 if none */
uint64 rectupledescid; /* record's tupledesc ID as of last lookup */
ExpandedRecordFieldInfo finfo; /* field's attnum and type info */
/* if rectupledescid == INVALID_TUPLEDESC_IDENTIFIER, finfo isn't valid */
} PLtsql_recfield;
/*
* Element of array variable
*/
typedef struct PLtsql_arrayelem
{
PLtsql_datum_type dtype;
int dno;
/* end of PLtsql_datum fields */
PLtsql_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 */
} PLtsql_arrayelem;
/*
* Item in the compilers namespace tree
*/
typedef struct PLtsql_nsitem
{
PLtsql_nsitem_type itemtype;
/*
* For labels, itemno is a value of enum PLtsql_label_type. For other
* itemtypes, itemno is the associated PLtsql_datum's dno.
*/
int itemno;
struct PLtsql_nsitem *prev;
char name[FLEXIBLE_ARRAY_MEMBER]; /* nul-terminated string */
} PLtsql_nsitem;
typedef enum PLtsql_impl_txn_type
{
PLTSQL_IMPL_TRAN_OFF,
PLTSQL_IMPL_TRAN_ON,
PLTSQL_IMPL_TRAN_START
} PLtsql_impl_txn_type;
/*
* Generic execution node
*/
typedef struct PLtsql_stmt
{
PLtsql_stmt_type cmd_type;
int lineno;
} PLtsql_stmt;
/*
* One EXCEPTION condition name
*/
typedef struct PLtsql_condition
{
int sqlerrstate; /* SQLSTATE code */
char *condname; /* condition name (for debugging) */
struct PLtsql_condition *next;
} PLtsql_condition;
/*
* EXCEPTION block
*/
typedef struct PLtsql_exception_block
{
int sqlstate_varno;
int sqlerrm_varno;
List *exc_list; /* List of WHEN clauses */
} PLtsql_exception_block;
/*
* One EXCEPTION ... WHEN clause
*/
typedef struct PLtsql_exception
{
int lineno;
PLtsql_condition *conditions;
List *action; /* List of statements */
} PLtsql_exception;
/*
* Block of statements
*/
typedef struct PLtsql_stmt_block
{
PLtsql_stmt_type cmd_type;
int lineno;
char *label;
List *body; /* List of statements */
int n_initvars; /* Length of initvarnos[] */
int *initvarnos; /* dnos of variables declared in this block */
PLtsql_exception_block *exceptions;
} PLtsql_stmt_block;
/*
* Assign statement
*/
typedef struct PLtsql_stmt_assign
{
PLtsql_stmt_type cmd_type;
int lineno;
int varno;
PLtsql_expr *expr;
} PLtsql_stmt_assign;
/*
* PERFORM statement
*/
typedef struct PLtsql_stmt_perform
{
PLtsql_stmt_type cmd_type;
int lineno;
PLtsql_expr *expr;
} PLtsql_stmt_perform;
/*
* CALL statement
*/
typedef struct PLtsql_stmt_call
{
PLtsql_stmt_type cmd_type;
int lineno;
PLtsql_expr *expr;
bool is_call;
PLtsql_variable *target;
} PLtsql_stmt_call;
/*
* COMMIT statement
*/
typedef struct PLtsql_stmt_commit
{
PLtsql_stmt_type cmd_type;
int lineno;
} PLtsql_stmt_commit;
/*
* ROLLBACK statement
*/
typedef struct PLtsql_stmt_rollback
{
PLtsql_stmt_type cmd_type;
int lineno;
} PLtsql_stmt_rollback;
/*
* SET statement
*/
typedef struct PLtsql_stmt_set
{
PLtsql_stmt_type cmd_type;
int lineno;
PLtsql_expr *expr;
} PLtsql_stmt_set;
/*
* GET DIAGNOSTICS item
*/
typedef struct PLtsql_diag_item
{
PLtsql_getdiag_kind kind; /* id for diagnostic value desired */
int target; /* where to assign it */
} PLtsql_diag_item;
/*
* GET DIAGNOSTICS statement
*/
typedef struct PLtsql_stmt_getdiag
{
PLtsql_stmt_type cmd_type;
int lineno;
bool is_stacked; /* STACKED or CURRENT diagnostics area? */
List *diag_items; /* List of PLtsql_diag_item */
} PLtsql_stmt_getdiag;
/*
* IF statement
*/
typedef struct PLtsql_stmt_if
{
PLtsql_stmt_type cmd_type;
int lineno;
PLtsql_expr *cond; /* boolean expression for THEN */
PLtsql_stmt *then_body; /* List of statements */
List *elsif_list; /* List of PLtsql_if_elsif structs */
PLtsql_stmt *else_body; /* List of statements */
} PLtsql_stmt_if;
/*
* one ELSIF arm of IF statement
*/
typedef struct PLtsql_if_elsif
{
int lineno;
PLtsql_expr *cond; /* boolean expression for this case */
List *stmts; /* List of statements */
} PLtsql_if_elsif;
/*
* CASE statement
*/
typedef struct PLtsql_stmt_case
{
PLtsql_stmt_type cmd_type;
int lineno;
PLtsql_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 PLtsql_case_when structs */
bool have_else; /* flag needed because list could be empty */
List *else_stmts; /* List of statements */
} PLtsql_stmt_case;
/*
* one arm of CASE statement
*/
typedef struct PLtsql_case_when
{
int lineno;
PLtsql_expr *expr; /* boolean expression for this case */
List *stmts; /* List of statements */
} PLtsql_case_when;
/*
* Unconditional LOOP statement
*/
typedef struct PLtsql_stmt_loop
{
PLtsql_stmt_type cmd_type;
int lineno;
char *label;
List *body; /* List of statements */
} PLtsql_stmt_loop;
/*
* WHILE cond LOOP statement
*/
typedef struct PLtsql_stmt_while
{
PLtsql_stmt_type cmd_type;
int lineno;
char *label;
PLtsql_expr *cond;
List *body; /* List of statements */
} PLtsql_stmt_while;
/*
* FOR statement with integer loopvar
*/
typedef struct PLtsql_stmt_fori
{
PLtsql_stmt_type cmd_type;
int lineno;
char *label;
PLtsql_var *var;
PLtsql_expr *lower;
PLtsql_expr *upper;
PLtsql_expr *step; /* NULL means default (ie, BY 1) */
int reverse;
List *body; /* List of statements */
} PLtsql_stmt_fori;
/*
* PLtsql_stmt_forq represents a FOR statement running over a SQL query.
* It is the common supertype of PLtsql_stmt_fors, PLtsql_stmt_forc
* and PLtsql_dynfors.
*/
typedef struct PLtsql_stmt_forq
{
PLtsql_stmt_type cmd_type;
int lineno;
char *label;
PLtsql_variable *var; /* Loop variable (record or row) */
List *body; /* List of statements */
} PLtsql_stmt_forq;
/*
* FOR statement running over SELECT
*/
typedef struct PLtsql_stmt_fors
{
PLtsql_stmt_type cmd_type;
int lineno;
char *label;
PLtsql_variable *var; /* Loop variable (record or row) */
List *body; /* List of statements */
/* end of fields that must match PLtsql_stmt_forq */
PLtsql_expr *query;
} PLtsql_stmt_fors;
/*
* FOR statement running over cursor
*/
typedef struct PLtsql_stmt_forc
{
PLtsql_stmt_type cmd_type;
int lineno;
char *label;
PLtsql_variable *var; /* Loop variable (record or row) */
List *body; /* List of statements */
/* end of fields that must match PLtsql_stmt_forq */
int curvar;
PLtsql_expr *argquery; /* cursor arguments if any */
} PLtsql_stmt_forc;
/*
* FOR statement running over EXECUTE
*/
typedef struct PLtsql_stmt_dynfors
{
PLtsql_stmt_type cmd_type;
int lineno;
char *label;
PLtsql_variable *var; /* Loop variable (record or row) */
List *body; /* List of statements */
/* end of fields that must match PLtsql_stmt_forq */
PLtsql_expr *query;
List *params; /* USING expressions */
} PLtsql_stmt_dynfors;
/*
* FOREACH item in array loop
*/
typedef struct PLtsql_stmt_foreach_a
{
PLtsql_stmt_type cmd_type;
int lineno;
char *label;
int varno; /* loop target variable */
int slice; /* slice dimension, or 0 */
PLtsql_expr *expr; /* array expression */
List *body; /* List of statements */
} PLtsql_stmt_foreach_a;
/*
* OPEN a curvar
*/
typedef struct PLtsql_stmt_open
{
PLtsql_stmt_type cmd_type;
int lineno;
int curvar;
int cursor_options;
PLtsql_expr *argquery;
PLtsql_expr *query;
PLtsql_expr *dynquery;
List *params; /* USING expressions */
} PLtsql_stmt_open;
/*
* FETCH or MOVE statement
*/
typedef struct PLtsql_stmt_fetch
{
PLtsql_stmt_type cmd_type;
int lineno;
PLtsql_variable *target; /* target (record or row) */
int curvar; /* cursor variable to fetch from */
FetchDirection direction; /* fetch direction */
long how_many; /* count, if constant (expr is NULL) */
PLtsql_expr *expr; /* count, if expression */
bool is_move; /* is this a fetch or move? */
bool returns_multiple_rows; /* can return more than one row? */
} PLtsql_stmt_fetch;
/*
* CLOSE curvar
*/
typedef struct PLtsql_stmt_close
{
PLtsql_stmt_type cmd_type;
int lineno;
int curvar;
} PLtsql_stmt_close;
/*
* EXIT or CONTINUE statement
*/
typedef struct PLtsql_stmt_exit
{
PLtsql_stmt_type cmd_type;
int lineno;
bool is_exit; /* Is this an exit or a continue? */
char *label; /* NULL if it's an unlabelled EXIT/CONTINUE */
PLtsql_expr *cond;
} PLtsql_stmt_exit;
/*
* INSERT BULK statement
*/
typedef struct PLtsql_stmt_insert_bulk
{
PLtsql_stmt_type cmd_type;
int lineno;
char *table_name;
char *schema_name;
char *db_name;
List *column_refs;
/* Insert Bulk Options. */
char *kilobytes_per_batch;
char *rows_per_batch;
bool keep_nulls;
bool check_constraints;
} PLtsql_stmt_insert_bulk;
/*
* RETURN statement
*/
typedef struct PLtsql_stmt_return
{
PLtsql_stmt_type cmd_type;
int lineno;
PLtsql_expr *expr;
int retvarno;
} PLtsql_stmt_return;
/*
* RETURN NEXT statement
*/
typedef struct PLtsql_stmt_return_next
{
PLtsql_stmt_type cmd_type;
int lineno;
PLtsql_expr *expr;
int retvarno;
} PLtsql_stmt_return_next;
/*
* RETURN QUERY statement
*/
typedef struct PLtsql_stmt_return_query
{
PLtsql_stmt_type cmd_type;
int lineno;
PLtsql_expr *query; /* if static query */
PLtsql_expr *dynquery; /* if dynamic query (RETURN QUERY EXECUTE) */
List *params; /* USING arguments for dynamic query */
} PLtsql_stmt_return_query;
/*
* RAISE statement
*/
typedef struct PLtsql_stmt_raise
{
PLtsql_stmt_type 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 PLtsql_raise_option */
} PLtsql_stmt_raise;
/*
* RAISE statement option
*/
typedef struct PLtsql_raise_option
{
PLtsql_raise_option_type opt_type;
PLtsql_expr *expr;
} PLtsql_raise_option;
/*
* Grant Connect stmt
*/
typedef struct PLtsql_stmt_grantdb
{
PLtsql_stmt_type cmd_type;
int lineno;
bool is_grant;
List *grantees; /* list of users */