diff options
Diffstat (limited to 'src/include/nodes/parsenodes.h')
| -rw-r--r-- | src/include/nodes/parsenodes.h | 201 |
1 files changed, 45 insertions, 156 deletions
diff --git a/src/include/nodes/parsenodes.h b/src/include/nodes/parsenodes.h index 5201e1bb0e7..f2d92431b71 100644 --- a/src/include/nodes/parsenodes.h +++ b/src/include/nodes/parsenodes.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $Id: parsenodes.h,v 1.221 2002/12/06 05:00:32 momjian Exp $ + * $Id: parsenodes.h,v 1.222 2002/12/12 15:49:40 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -34,7 +34,7 @@ typedef enum QuerySource /* * Query - - * all statments are turned into a Query tree (via transformStmt) + * all statements are turned into a Query tree (via transformStmt) * for further processing by the optimizer * utility statements (i.e. non-optimizable statements) * have the *utilityStmt field set. @@ -202,145 +202,6 @@ typedef struct TypeCast } TypeCast; /* - * CaseExpr - a CASE expression - */ -typedef struct CaseExpr -{ - NodeTag type; - Oid casetype; - Node *arg; /* implicit equality comparison argument */ - List *args; /* the arguments (list of WHEN clauses) */ - Node *defresult; /* the default result (ELSE clause) */ -} CaseExpr; - -/* - * CaseWhen - an argument to a CASE expression - */ -typedef struct CaseWhen -{ - NodeTag type; - Node *expr; /* comparison expression */ - Node *result; /* substitution result */ -} CaseWhen; - -/* ---------------- - * NullTest - * - * NullTest represents the operation of testing a value for NULLness. - * Currently, we only support scalar input values, but eventually a - * row-constructor input should be supported. - * The appropriate test is performed and returned as a boolean Datum. - * ---------------- - */ - -typedef enum NullTestType -{ - IS_NULL, IS_NOT_NULL -} NullTestType; - -typedef struct NullTest -{ - NodeTag type; - Node *arg; /* input expression */ - NullTestType nulltesttype; /* IS NULL, IS NOT NULL */ -} NullTest; - -/* - * BooleanTest - * - * BooleanTest represents the operation of determining whether a boolean - * is TRUE, FALSE, or UNKNOWN (ie, NULL). All six meaningful combinations - * are supported. Note that a NULL input does *not* cause a NULL result. - * The appropriate test is performed and returned as a boolean Datum. - */ - -typedef enum BoolTestType -{ - IS_TRUE, IS_NOT_TRUE, IS_FALSE, IS_NOT_FALSE, IS_UNKNOWN, IS_NOT_UNKNOWN -} BoolTestType; - -typedef struct BooleanTest -{ - NodeTag type; - Node *arg; /* input expression */ - BoolTestType booltesttype; /* test type */ -} BooleanTest; - -/* - * ConstraintTest - * - * ConstraintTest represents the operation of testing a value to see whether - * it meets a constraint. If so, the input value is returned as the result; - * if not, an error is raised. - */ - -typedef enum ConstraintTestType -{ - CONSTR_TEST_NOTNULL, - CONSTR_TEST_CHECK -} ConstraintTestType; - -typedef struct ConstraintTest -{ - NodeTag type; - Node *arg; /* input expression */ - ConstraintTestType testtype; /* test type */ - char *name; /* name of constraint (for error msgs) */ - char *domname; /* name of domain (for error messages) */ - Node *check_expr; /* for CHECK test, a boolean expression */ -} ConstraintTest; - -/* - * Placeholder node for the value to be processed by a domains - * check constraint. - */ -typedef struct DomainConstraintValue -{ - NodeTag type; -} DomainConstraintValue; - -typedef struct ConstraintTestValue -{ - NodeTag type; - Oid typeId; - int32 typeMod; -} ConstraintTestValue; - -/* - * ColumnDef - column definition (used in various creates) - * - * If the column has a default value, we may have the value expression - * in either "raw" form (an untransformed parse tree) or "cooked" form - * (the nodeToString representation of an executable expression tree), - * depending on how this ColumnDef node was created (by parsing, or by - * inheritance from an existing relation). We should never have both - * in the same node! - * - * The constraints list may contain a CONSTR_DEFAULT item in a raw - * parsetree produced by gram.y, but transformCreateStmt will remove - * the item and set raw_default instead. CONSTR_DEFAULT items - * should not appear in any subsequent processing. - * - * The "support" field, if not null, denotes a supporting relation that - * should be linked by an internal dependency to the column. Currently - * this is only used to link a SERIAL column's sequence to the column. - */ -typedef struct ColumnDef -{ - NodeTag type; - char *colname; /* name of column */ - TypeName *typename; /* type of column */ - int inhcount; /* number of times column is inherited */ - bool is_local; /* column has local (non-inherited) def'n */ - bool is_not_null; /* NOT NULL constraint specified? */ - Node *raw_default; /* default value (untransformed parse - * tree) */ - char *cooked_default; /* nodeToString representation */ - List *constraints; /* other constraints on column */ - RangeVar *support; /* supporting relation, if any */ -} ColumnDef; - -/* * FuncCall - a function or aggregate invocation * * agg_star indicates we saw a 'foo(*)' construct, while agg_distinct @@ -415,6 +276,15 @@ typedef struct InsertDefault } InsertDefault; /* + * Empty node used as raw-parse-tree representation of VALUE keyword + * for domain check constraints. + */ +typedef struct DomainConstraintValue +{ + NodeTag type; +} DomainConstraintValue; + +/* * SortGroupBy - for ORDER BY clause */ typedef struct SortGroupBy @@ -447,6 +317,40 @@ typedef struct RangeFunction } RangeFunction; /* + * ColumnDef - column definition (used in various creates) + * + * If the column has a default value, we may have the value expression + * in either "raw" form (an untransformed parse tree) or "cooked" form + * (the nodeToString representation of an executable expression tree), + * depending on how this ColumnDef node was created (by parsing, or by + * inheritance from an existing relation). We should never have both + * in the same node! + * + * The constraints list may contain a CONSTR_DEFAULT item in a raw + * parsetree produced by gram.y, but transformCreateStmt will remove + * the item and set raw_default instead. CONSTR_DEFAULT items + * should not appear in any subsequent processing. + * + * The "support" field, if not null, denotes a supporting relation that + * should be linked by an internal dependency to the column. Currently + * this is only used to link a SERIAL column's sequence to the column. + */ +typedef struct ColumnDef +{ + NodeTag type; + char *colname; /* name of column */ + TypeName *typename; /* type of column */ + int inhcount; /* number of times column is inherited */ + bool is_local; /* column has local (non-inherited) def'n */ + bool is_not_null; /* NOT NULL constraint specified? */ + Node *raw_default; /* default value (untransformed parse + * tree) */ + char *cooked_default; /* nodeToString representation */ + List *constraints; /* other constraints on column */ + RangeVar *support; /* supporting relation, if any */ +} ColumnDef; + +/* * IndexElem - index parameters (used in CREATE INDEX) * * For a plain index, each 'name' is an attribute name in the heap relation; @@ -479,21 +383,6 @@ typedef struct DefElem * Nodes for a Query tree ****************************************************************************/ -/* - * TargetEntry - - * a target entry (used in the transformed target list) - * - * one of resdom or fjoin is not NULL. a target list is - * ((<resdom | fjoin> expr) (<resdom | fjoin> expr) ...) - */ -typedef struct TargetEntry -{ - NodeTag type; - Resdom *resdom; /* fjoin overload this to be a list?? */ - Fjoin *fjoin; - Node *expr; -} TargetEntry; - /*-------------------- * RangeTblEntry - * A range table is a List of RangeTblEntry nodes. |