parsenodes.h

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typedef struct CreateTrigStmt
{
	NodeTag		type;
	char	   *trigname;		/* TRIGGER's name */
	RangeVar   *relation;		/* relation trigger is on */
	List	   *funcname;		/* qual. name of function to call */
	List	   *args;			/* list of (T_String) Values or NIL */
	bool		before;			/* BEFORE/AFTER */
	bool		row;			/* ROW/STATEMENT */
	char		actions[4];		/* 1 to 3 of 'i', 'u', 'd', + trailing \0 */

	/* The following are used for referential */
	/* integrity constraint triggers */
	bool		isconstraint;	/* This is an RI trigger */
	bool		deferrable;		/* [NOT] DEFERRABLE */
	bool		initdeferred;	/* INITIALLY {DEFERRED|IMMEDIATE} */
	RangeVar   *constrrel;		/* opposite relation */
} CreateTrigStmt;

/* ----------------------
 *		Create/Drop PROCEDURAL LANGUAGE Statement
 * ----------------------
 */
typedef struct CreatePLangStmt
{
	NodeTag		type;
	char	   *plname;			/* PL name */
	List	   *plhandler;		/* PL call handler function (qual. name) */
	List	   *plvalidator;	/* optional validator function (qual. name) */
	bool		pltrusted;		/* PL is trusted */
} CreatePLangStmt;

typedef struct DropPLangStmt
{
	NodeTag		type;
	char	   *plname;			/* PL name */
	DropBehavior behavior;		/* RESTRICT or CASCADE behavior */
	bool		missing_ok;		/* skip error if missing? */
} DropPLangStmt;

/* ----------------------
 *	Create/Alter/Drop Role Statements
 *
 * Note: these node types are also used for the backwards-compatible
 * Create/Alter/Drop User/Group statements.  In the ALTER and DROP cases
 * there's really no need to distinguish what the original spelling was,
 * but for CREATE we mark the type because the defaults vary.
 * ----------------------
 */
typedef enum RoleStmtType
{
	ROLESTMT_ROLE,
	ROLESTMT_USER,
	ROLESTMT_GROUP
} RoleStmtType;

typedef struct CreateRoleStmt
{
	NodeTag		type;
	RoleStmtType stmt_type;		/* ROLE/USER/GROUP */
	char	   *role;			/* role name */
	List	   *options;		/* List of DefElem nodes */
} CreateRoleStmt;

typedef struct AlterRoleStmt
{
	NodeTag		type;
	char	   *role;			/* role name */
	List	   *options;		/* List of DefElem nodes */
	int			action;			/* +1 = add members, -1 = drop members */
} AlterRoleStmt;

typedef struct AlterRoleSetStmt
{
	NodeTag		type;
	char	   *role;			/* role name */
	char	   *variable;		/* GUC variable name */
	List	   *value;			/* value for variable, or NIL for Reset */
} AlterRoleSetStmt;

typedef struct DropRoleStmt
{
	NodeTag		type;
	List	   *roles;			/* List of roles to remove */
	bool		missing_ok;		/* skip error if a role is missing? */
} DropRoleStmt;

/* ----------------------
 *		{Create|Alter} SEQUENCE Statement
 * ----------------------
 */

typedef struct CreateSeqStmt
{
	NodeTag		type;
	RangeVar   *sequence;		/* the sequence to create */
	List	   *options;
} CreateSeqStmt;

typedef struct AlterSeqStmt
{
	NodeTag		type;
	RangeVar   *sequence;		/* the sequence to alter */
	List	   *options;
} AlterSeqStmt;

/* ----------------------
 *		Create {Aggregate|Operator|Type} Statement
 * ----------------------
 */
typedef struct DefineStmt
{
	NodeTag		type;
	ObjectType	kind;			/* aggregate, operator, type */
	bool		oldstyle;		/* hack to signal old CREATE AGG syntax */
	List	   *defnames;		/* qualified name (list of Value strings) */
	List	   *args;			/* a list of TypeName (if needed) */
	List	   *definition;		/* a list of DefElem */
} DefineStmt;

/* ----------------------
 *		Create Domain Statement
 * ----------------------
 */
typedef struct CreateDomainStmt
{
	NodeTag		type;
	List	   *domainname;		/* qualified name (list of Value strings) */
	TypeName   *typename;		/* the base type */
	List	   *constraints;	/* constraints (list of Constraint nodes) */
} CreateDomainStmt;

/* ----------------------
 *		Create Operator Class Statement
 * ----------------------
 */
typedef struct CreateOpClassStmt
{
	NodeTag		type;
	List	   *opclassname;	/* qualified name (list of Value strings) */
	char	   *amname;			/* name of index AM opclass is for */
	TypeName   *datatype;		/* datatype of indexed column */
	List	   *items;			/* List of CreateOpClassItem nodes */
	bool		isDefault;		/* Should be marked as default for type? */
} CreateOpClassStmt;

#define OPCLASS_ITEM_OPERATOR		1
#define OPCLASS_ITEM_FUNCTION		2
#define OPCLASS_ITEM_STORAGETYPE	3

typedef struct CreateOpClassItem
{
	NodeTag		type;
	int			itemtype;		/* see codes above */
	/* fields used for an operator or function item: */
	List	   *name;			/* operator or function name */
	List	   *args;			/* argument types */
	int			number;			/* strategy num or support proc num */
	bool		recheck;		/* only used for operators */
	/* fields used for a storagetype item: */
	TypeName   *storedtype;		/* datatype stored in index */
} CreateOpClassItem;

/* ----------------------
 *		Drop Table|Sequence|View|Index|Type|Domain|Conversion|Schema Statement
 * ----------------------
 */

typedef struct DropStmt
{
	NodeTag		type;
	List	   *objects;		/* list of sublists of names (as Values) */
	ObjectType	removeType;		/* object type */
	DropBehavior behavior;		/* RESTRICT or CASCADE behavior */
	bool		missing_ok;		/* skip error if object is missing? */
} DropStmt;

/* ----------------------
 *		Drop Rule|Trigger Statement
 *
 * In general this may be used for dropping any property of a relation;
 * for example, someday soon we may have DROP ATTRIBUTE.
 * ----------------------
 */

typedef struct DropPropertyStmt
{
	NodeTag		type;
	RangeVar   *relation;		/* owning relation */
	char	   *property;		/* name of rule, trigger, etc */
	ObjectType	removeType;		/* OBJECT_RULE or OBJECT_TRIGGER */
	DropBehavior behavior;		/* RESTRICT or CASCADE behavior */
	bool		missing_ok;		/* skip error if a missing? */
} DropPropertyStmt;

/* ----------------------
 *				Truncate Table Statement
 * ----------------------
 */
typedef struct TruncateStmt
{
	NodeTag		type;
	List	   *relations;		/* relations (RangeVars) to be truncated */
	DropBehavior behavior;		/* RESTRICT or CASCADE behavior */
} TruncateStmt;

/* ----------------------
 *				Comment On Statement
 * ----------------------
 */
typedef struct CommentStmt
{
	NodeTag		type;
	ObjectType	objtype;		/* Object's type */
	List	   *objname;		/* Qualified name of the object */
	List	   *objargs;		/* Arguments if needed (eg, for functions) */
	char	   *comment;		/* Comment to insert, or NULL to remove */
} CommentStmt;

/* ----------------------
 *		Declare Cursor Statement
 * ----------------------
 */
#define CURSOR_OPT_BINARY		0x0001
#define CURSOR_OPT_SCROLL		0x0002
#define CURSOR_OPT_NO_SCROLL	0x0004
#define CURSOR_OPT_INSENSITIVE	0x0008
#define CURSOR_OPT_HOLD			0x0010

typedef struct DeclareCursorStmt
{
	NodeTag		type;
	char	   *portalname;		/* name of the portal (cursor) */
	int			options;		/* bitmask of options (see above) */
	Node	   *query;			/* the SELECT query */
} DeclareCursorStmt;

/* ----------------------
 *		Close Portal Statement
 * ----------------------
 */
typedef struct ClosePortalStmt
{
	NodeTag		type;
	char	   *portalname;		/* name of the portal (cursor) */
} ClosePortalStmt;

/* ----------------------
 *		Fetch Statement (also Move)
 * ----------------------
 */
typedef enum FetchDirection
{
	/* for these, howMany is how many rows to fetch; FETCH_ALL means ALL */
	FETCH_FORWARD,
	FETCH_BACKWARD,
	/* for these, howMany indicates a position; only one row is fetched */
	FETCH_ABSOLUTE,
	FETCH_RELATIVE
} FetchDirection;

#define FETCH_ALL	LONG_MAX

typedef struct FetchStmt
{
	NodeTag		type;
	FetchDirection direction;	/* see above */
	long		howMany;		/* number of rows, or position argument */
	char	   *portalname;		/* name of portal (cursor) */
	bool		ismove;			/* TRUE if MOVE */
} FetchStmt;

/* ----------------------
 *		Create Index Statement
 * ----------------------
 */
typedef struct IndexStmt
{
	NodeTag		type;
	char	   *idxname;		/* name of new index, or NULL for default */
	RangeVar   *relation;		/* relation to build index on */
	char	   *accessMethod;	/* name of access method (eg. btree) */
	char	   *tableSpace;		/* tablespace, or NULL to use parent's */
	List	   *indexParams;	/* a list of IndexElem */
	List	   *options;		/* options from WITH clause */
	Node	   *whereClause;	/* qualification (partial-index predicate) */
	List	   *rangetable;		/* range table for qual and/or expressions,
								 * filled in by transformStmt() */
	bool		unique;			/* is index unique? */
	bool		primary;		/* is index on primary key? */
	bool		isconstraint;	/* is it from a CONSTRAINT clause? */
	bool		concurrent;		/* should this be a concurrent index build? */
} IndexStmt;

/* ----------------------
 *		Create Function Statement
 * ----------------------
 */
typedef struct CreateFunctionStmt
{
	NodeTag		type;
	bool		replace;		/* T => replace if already exists */
	List	   *funcname;		/* qualified name of function to create */
	List	   *parameters;		/* a list of FunctionParameter */
	TypeName   *returnType;		/* the return type */
	List	   *options;		/* a list of DefElem */
	List	   *withClause;		/* a list of DefElem */
} CreateFunctionStmt;

typedef enum FunctionParameterMode
{
	/* the assigned enum values appear in pg_proc, don't change 'em! */
	FUNC_PARAM_IN = 'i',		/* input only */
	FUNC_PARAM_OUT = 'o',		/* output only */
	FUNC_PARAM_INOUT = 'b'		/* both */
} FunctionParameterMode;

typedef struct FunctionParameter
{
	NodeTag		type;
	char	   *name;			/* parameter name, or NULL if not given */
	TypeName   *argType;		/* TypeName for parameter type */
	FunctionParameterMode mode; /* IN/OUT/INOUT */
} FunctionParameter;

typedef struct AlterFunctionStmt
{
	NodeTag		type;
	FuncWithArgs *func;			/* name and args of function */
	List	   *actions;		/* list of DefElem */
} AlterFunctionStmt;

/* ----------------------
 *		Drop {Function|Aggregate|Operator} Statement
 * ----------------------
 */
typedef struct RemoveFuncStmt
{
	NodeTag		type;
	ObjectType	kind;			/* function, aggregate, operator */
	List	   *name;			/* qualified name of object to drop */
	List	   *args;			/* types of the arguments */
	DropBehavior behavior;		/* RESTRICT or CASCADE behavior */
	bool		missing_ok;		/* skip error if a missing? */
} RemoveFuncStmt;

/* ----------------------
 *		Drop Operator Class Statement
 * ----------------------
 */
typedef struct RemoveOpClassStmt
{
	NodeTag		type;
	List	   *opclassname;	/* qualified name (list of Value strings) */
	char	   *amname;			/* name of index AM opclass is for */
	DropBehavior behavior;		/* RESTRICT or CASCADE behavior */
	bool		missing_ok;		/* skip error if a missing? */
} RemoveOpClassStmt;

/* ----------------------
 *		Alter Object Rename Statement
 * ----------------------
 */
typedef struct RenameStmt
{
	NodeTag		type;
	ObjectType	renameType;		/* OBJECT_TABLE, OBJECT_COLUMN, etc */
	RangeVar   *relation;		/* in case it's a table */
	List	   *object;			/* in case it's some other object */
	List	   *objarg;			/* argument types, if applicable */
	char	   *subname;		/* name of contained object (column, rule,
								 * trigger, etc) */
	char	   *newname;		/* the new name */
} RenameStmt;

/* ----------------------
 *		ALTER object SET SCHEMA Statement
 * ----------------------
 */
typedef struct AlterObjectSchemaStmt
{
	NodeTag		type;
	ObjectType objectType;		/* OBJECT_TABLE, OBJECT_TYPE, etc */
	RangeVar   *relation;		/* in case it's a table */
	List	   *object;			/* in case it's some other object */
	List	   *objarg;			/* argument types, if applicable */
	char	   *addname;		/* additional name if needed */
	char	   *newschema;		/* the new schema */
} AlterObjectSchemaStmt;

/* ----------------------
 *		Alter Object Owner Statement