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2594cf0e8c
The previous functions of assign hooks are now split between check hooks and assign hooks, where the former can fail but the latter shouldn't. Aside from being conceptually clearer, this approach exposes the "canonicalized" form of the variable value to guc.c without having to do an actual assignment. And that lets us fix the problem recently noted by Bernd Helmle that the auto-tune patch for wal_buffers resulted in bogus log messages about "parameter "wal_buffers" cannot be changed without restarting the server". There may be some speed advantage too, because this design lets hook functions avoid re-parsing variable values when restoring a previous state after a rollback (they can store a pre-parsed representation of the value instead). This patch also resolves a longstanding annoyance about custom error messages from variable assign hooks: they should modify, not appear separately from, guc.c's own message about "invalid parameter value".
37 lines
993 B
C
37 lines
993 B
C
/*-------------------------------------------------------------------------
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*
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* tzparser.h
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* Timezone offset file parsing definitions.
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*
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* Portions Copyright (c) 1996-2011, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/include/utils/tzparser.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef TZPARSER_H
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#define TZPARSER_H
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#include "utils/datetime.h"
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/*
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* The result of parsing a timezone configuration file is an array of
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* these structs, in order by abbrev. We export this because datetime.c
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* needs it.
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*/
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typedef struct tzEntry
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{
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/* the actual data: TZ abbrev (downcased), offset, DST flag */
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char *abbrev;
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int offset; /* in seconds from UTC */
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bool is_dst;
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/* source information (for error messages) */
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int lineno;
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const char *filename;
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} tzEntry;
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extern TimeZoneAbbrevTable *load_tzoffsets(const char *filename);
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#endif /* TZPARSER_H */
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