diff options
Diffstat (limited to 'src/include/nodes/parsenodes.h')
| -rw-r--r-- | src/include/nodes/parsenodes.h | 48 |
1 files changed, 36 insertions, 12 deletions
diff --git a/src/include/nodes/parsenodes.h b/src/include/nodes/parsenodes.h index 463ea1518e0..8ac9e3d7647 100644 --- a/src/include/nodes/parsenodes.h +++ b/src/include/nodes/parsenodes.h @@ -6,7 +6,7 @@ * * Copyright (c) 1994, Regents of the University of California * - * $Id: parsenodes.h,v 1.82 1999/10/02 21:33:33 tgl Exp $ + * $Id: parsenodes.h,v 1.83 1999/10/03 23:55:36 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -140,25 +140,36 @@ typedef struct CreateStmt { NodeTag type; bool istemp; /* is this a temp table? */ - char *relname; /* the relation to create */ - List *tableElts; /* column definitions list of Column */ - List *inhRelnames; /* relations to inherit from list of Value - * (string) */ - List *constraints; /* list of constraints (ConstaintDef) */ + char *relname; /* name of relation to create */ + List *tableElts; /* column definitions (list of ColumnDef) */ + List *inhRelnames; /* relations to inherit from (list of + * T_String Values) */ + List *constraints; /* list of constraints (Constraint nodes) */ } CreateStmt; -typedef enum ConstrType /* type of constaints */ +typedef enum ConstrType /* types of constraints */ { - CONSTR_NULL, CONSTR_NOTNULL, CONSTR_DEFAULT, CONSTR_CHECK, CONSTR_PRIMARY, CONSTR_UNIQUE + CONSTR_NULL, CONSTR_NOTNULL, CONSTR_DEFAULT, CONSTR_CHECK, + CONSTR_PRIMARY, CONSTR_UNIQUE } ConstrType; +/* + * For constraints that use expressions (CONSTR_DEFAULT, CONSTR_CHECK) + * we may have the expression in either "raw" form (an untransformed + * parse tree) or "cooked" form (the nodeToString representation of + * an executable expression tree), depending on how this Constraint + * node was created (by parsing, or by inheritance from an existing + * relation). We should never have both in the same node! + */ + typedef struct Constraint { NodeTag type; ConstrType contype; char *name; /* name */ - void *def; /* definition */ - void *keys; /* list of primary keys */ + Node *raw_expr; /* untransformed parse tree */ + char *cooked_expr; /* nodeToString representation */ + List *keys; /* list of primary keys */ } Constraint; /* ---------------------- @@ -790,6 +801,18 @@ typedef struct CaseWhen /* * 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. */ typedef struct ColumnDef { @@ -798,8 +821,9 @@ typedef struct ColumnDef TypeName *typename; /* type of column */ bool is_not_null; /* flag to NOT NULL constraint */ bool is_sequence; /* is a sequence? */ - char *defval; /* default value of column */ - List *constraints; /* constraints on column */ + Node *raw_default; /* default value (untransformed parse tree) */ + char *cooked_default; /* nodeToString representation */ + List *constraints; /* other constraints on column */ } ColumnDef; /* |