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postgresql/src/include/parser/parse_expr.h

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Break parser functions into smaller files, group together.
1997-11-26 06:07:18 +08:00
/*-------------------------------------------------------------------------
*
Rewrite parser's handling of INSERT ... SELECT so that processing of the SELECT part of the statement is just like a plain SELECT. All INSERT-specific processing happens after the SELECT parsing is done. This eliminates many problems, e.g. INSERT ... SELECT ... GROUP BY using the wrong column labels. Ensure that DEFAULT clauses are coerced to the target column type, whether or not stored clause produces the right type. Substantial cleanup of parser's array support.
1999-07-19 08:26:20 +08:00
* parse_expr.h
Break parser functions into smaller files, group together.
1997-11-26 06:07:18 +08:00
*
*
*
Change Copyright from PostgreSQL, Inc to PostgreSQL Global Development Group.
2001-01-25 03:43:33 +08:00
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
Add: * Portions Copyright (c) 1996-2000, PostgreSQL, Inc to all files copyright Regents of Berkeley. Man, that's a lot of files.
2000-01-26 13:58:53 +08:00
* Portions Copyright (c) 1994, Regents of the University of California
Break parser functions into smaller files, group together.
1997-11-26 06:07:18 +08:00
*
pgindent run on all C files. Java run to follow. initdb/regression tests pass.
2001-10-25 13:50:21 +08:00
* $Id: parse_expr.h,v 1.23 2001/10/25 05:50:06 momjian Exp $
Break parser functions into smaller files, group together.
1997-11-26 06:07:18 +08:00
*
*-------------------------------------------------------------------------
*/
#ifndef PARSE_EXPR_H
#define PARSE_EXPR_H
Change #include's to use <> and "" as appropriate.
1999-07-16 07:04:24 +08:00
#include "parser/parse_node.h"
Break parser functions into smaller files, group together.
1997-11-26 06:07:18 +08:00
Rewrite parser's handling of INSERT ... SELECT so that processing of the SELECT part of the statement is just like a plain SELECT. All INSERT-specific processing happens after the SELECT parsing is done. This eliminates many problems, e.g. INSERT ... SELECT ... GROUP BY using the wrong column labels. Ensure that DEFAULT clauses are coerced to the target column type, whether or not stored clause produces the right type. Substantial cleanup of parser's array support.
1999-07-19 08:26:20 +08:00
#define EXPR_COLUMN_FIRST 1
#define EXPR_RELATION_FIRST 2
Add safety check on expression nesting depth. Default value is set by a config.h #define, and the runtime value can be controlled via SET.
2000-03-17 13:29:07 +08:00
extern int max_expr_depth;
Provide tunable knob for x = NULL -> x IS NULL transformation, default to off.
2001-09-20 22:20:28 +08:00
extern bool Transform_null_equals;
Add safety check on expression nesting depth. Default value is set by a config.h #define, and the runtime value can be controlled via SET.
2000-03-17 13:29:07 +08:00
Cleanup up include files.
1997-11-26 09:14:33 +08:00
extern Node *transformExpr(ParseState *pstate, Node *expr, int precedence);
pgindent run before 6.3 release, with Thomas' requested changes.
1998-02-26 12:46:47 +08:00
extern Oid exprType(Node *expr);
Rewrite parser's handling of INSERT ... SELECT so that processing of the SELECT part of the statement is just like a plain SELECT. All INSERT-specific processing happens after the SELECT parsing is done. This eliminates many problems, e.g. INSERT ... SELECT ... GROUP BY using the wrong column labels. Ensure that DEFAULT clauses are coerced to the target column type, whether or not stored clause produces the right type. Substantial cleanup of parser's array support.
1999-07-19 08:26:20 +08:00
extern int32 exprTypmod(Node *expr);
Fix exprTypmod to recognize length-coercion function expressions, such as bpchar(char_expression, N), and pull out the attrtypmod that the function is coercing to. This allows correct deduction of the column type in examples such as CREATE VIEW v AS SELECT f1::char(8) FROM tbl; Formerly we labeled v's column as char-of-unknown-length not char(8). Also, this change causes the parser not to insert a redundant length coercion function if the user has explicitly casted an INSERT or UPDATE expression to the right length.
2000-02-27 05:11:10 +08:00
extern bool exprIsLengthCoercion(Node *expr, int32 *coercedTypmod);
Add safety check on expression nesting depth. Default value is set by a config.h #define, and the runtime value can be controlled via SET.
2000-03-17 13:29:07 +08:00
extern void parse_expr_init(void);
Arrange that no database accesses are attempted during parser() --- this took some rejiggering of typename and ACL parsing, as well as moving parse_analyze call out of parser(). Restructure postgres.c processing so that parse analysis and rewrite are skipped when in abort-transaction state. Only COMMIT and ABORT statements will be processed beyond the raw parser() phase. This addresses problem of parser failing with database access errors while in aborted state (see pghackers discussions around 7/28/00). Also fix some bugs with COMMIT/ABORT statements appearing in the middle of a single query input string. Function, operator, and aggregate arguments/results can now use full TypeName production, in particular foo[] for array types. DROP OPERATOR and COMMENT ON OPERATOR were broken for unary operators. Allow CREATE AGGREGATE to accept unquoted numeric constants for initcond.
2000-10-07 08:58:23 +08:00
extern char *TypeNameToInternalName(TypeName *typename);
OK, folks, here is the pgindent output.
1998-09-01 12:40:42 +08:00
#endif /* PARSE_EXPR_H */
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