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Error suppression support for upcoming jsonpath .datetime() method

Add support of error suppression in some date and time manipulation functions
as it's required for jsonpath .datetime() method support.  This commit doesn't
use PG_TRY()/PG_CATCH() in order to implement that.  Instead, it provides
internal versions of date and time functions used, which support error
suppression.

Discussion: https://postgr.es/m/CAPpHfdsZgYEra_PeCLGNoXOWYx6iU-S3wF8aX0ObQUcZU%2B4XTw%40mail.gmail.com
Author: Alexander Korotkov, Nikita Glukhov
Reviewed-by: Anastasia Lubennikova, Peter Eisentraut
This commit is contained in:
Alexander Korotkov
2019-09-25 21:51:47 +03:00
parent 66c74f8b6e
commit 5bc450629b
7 changed files with 480 additions and 221 deletions

View File

@ -329,11 +329,11 @@ timestamp_scale(PG_FUNCTION_ARGS)
}
/*
* AdjustTimestampForTypmod --- round off a timestamp to suit given typmod
* AdjustTimestampForTypmodError --- round off a timestamp to suit given typmod
* Works for either timestamp or timestamptz.
*/
void
AdjustTimestampForTypmod(Timestamp *time, int32 typmod)
bool
AdjustTimestampForTypmodError(Timestamp *time, int32 typmod, bool *error)
{
static const int64 TimestampScales[MAX_TIMESTAMP_PRECISION + 1] = {
INT64CONST(1000000),
@ -359,10 +359,18 @@ AdjustTimestampForTypmod(Timestamp *time, int32 typmod)
&& (typmod != -1) && (typmod != MAX_TIMESTAMP_PRECISION))
{
if (typmod < 0 || typmod > MAX_TIMESTAMP_PRECISION)
{
if (error)
{
*error = true;
return false;
}
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("timestamp(%d) precision must be between %d and %d",
typmod, 0, MAX_TIMESTAMP_PRECISION)));
}
if (*time >= INT64CONST(0))
{
@ -375,8 +383,15 @@ AdjustTimestampForTypmod(Timestamp *time, int32 typmod)
* TimestampScales[typmod]);
}
}
return true;
}
void
AdjustTimestampForTypmod(Timestamp *time, int32 typmod)
{
(void) AdjustTimestampForTypmodError(time, typmod, NULL);
}
/* timestamptz_in()
* Convert a string to internal form.
@ -5172,8 +5187,15 @@ timestamp_timestamptz(PG_FUNCTION_ARGS)
PG_RETURN_TIMESTAMPTZ(timestamp2timestamptz(timestamp));
}
static TimestampTz
timestamp2timestamptz(Timestamp timestamp)
/*
* Convert timestamp to timestamp with time zone.
*
* If 'have_error' is NULL, then errors are thrown, else '*have_error' is set
* and zero is returned.
*/
TimestampTz
timestamp2timestamptz_opt_error(Timestamp timestamp, bool *have_error)
{
TimestampTz result;
struct pg_tm tt,
@ -5182,23 +5204,33 @@ timestamp2timestamptz(Timestamp timestamp)
int tz;
if (TIMESTAMP_NOT_FINITE(timestamp))
result = timestamp;
else
{
if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL, NULL) != 0)
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));
return timestamp;
if (!timestamp2tm(timestamp, NULL, tm, &fsec, NULL, NULL))
{
tz = DetermineTimeZoneOffset(tm, session_timezone);
if (tm2timestamp(tm, fsec, &tz, &result) != 0)
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));
if (!tm2timestamp(tm, fsec, &tz, &result))
return result;
}
return result;
if (have_error)
*have_error = true;
else
ereport(ERROR,
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
errmsg("timestamp out of range")));
return 0;
}
/*
* Single-argument version of timestamp2timestamptz_opt_error().
*/
static TimestampTz
timestamp2timestamptz(Timestamp timestamp)
{
return timestamp2timestamptz_opt_error(timestamp, NULL);
}
/* timestamptz_timestamp()