postgres

Commit Graph

Author	SHA1	Message	Date
Fujii Masao	1871c89202	Add generate_series(numeric, numeric). Платон Малюгин Reviewed by Michael Paquier, Ali Akbar and Marti Raudsepp	11 years ago
Tom Lane	1d352325b8	Fix power_var_int() for large integer exponents. The code for raising a NUMERIC value to an integer power wasn't very careful about large powers. It got an outright wrong answer for an exponent of INT_MIN, due to failure to consider overflow of the Abs(exp) operation; which is fixable by using an unsigned rather than signed exponent value after that point. Also, even though the number of iterations of the power-computation loop is pretty limited, it's easy for the repeated squarings to result in ridiculously enormous intermediate values, which can take unreasonable amounts of time/memory to process, or even overflow the internal "weight" field and so produce a wrong answer. We can forestall misbehaviors of that sort by bailing out as soon as the weight value exceeds what will fit in int16, since then the final answer must overflow (if exp > 0) or underflow (if exp < 0) the packed numeric format. Per off-list report from Pavel Stehule. Back-patch to all supported branches.	11 years ago
Tom Lane	f0bedf3e45	Fix corner case bug in numeric to_char(). Trailing-zero stripping applied by the FM specifier could strip zeroes to the left of the decimal point, for a format with no digit positions after the decimal point (such as "FM999."). Reported and diagnosed by Marti Raudsepp, though I didn't use his patch.	15 years ago
Peter Eisentraut	fc946c39ae	Remove useless whitespace at end of lines	15 years ago
Tom Lane	e61fd4ac74	Support EEEE (scientific notation) in to_char(). Pavel Stehule, Brendan Jurd	17 years ago
Tom Lane	a0fad9762a	Re-implement division for numeric values using the traditional "schoolbook" algorithm. This is a good deal slower than our old roundoff-error-prone code for long inputs, so we keep the old code for use in the transcendental functions, where everything is approximate anyway. Also create a user-accessible function div(numeric, numeric) to provide access to the exact result of trunc(x/y) --- since the regular numeric / operator will round off its result, simply computing that expression in SQL doesn't reliably give the desired answer. This fixes bug #3387 and various related corner cases, and improves the usefulness of PG for high-precision integer arithmetic.	18 years ago
Neil Conway	530b10c719	Tweak the width_bucket() regression tests to avoid an unnecessary dependency on the platform's floating point implementation. Per report from Stefan Kaltenbrunner.	19 years ago
Neil Conway	cf57ef4e50	Implement width_bucket() for the float8 data type. The implementation is somewhat ugly logic-wise, but I don't see an easy way to make it more concise. When writing this, I noticed that my previous implementation of width_bucket() doesn't handle NaN correctly: postgres=# select width_bucket('NaN', 1, 5, 5); width_bucket -------------- 6 (1 row) AFAICS SQL:2003 does not define a NaN value, so it doesn't address how width_bucket() should behave here. The patch changes width_bucket() so that ereport(ERROR) is raised if NaN is specified for the operand or the lower or upper bounds to width_bucket(). For float8, NaN is disallowed for any of the floating-point inputs, and +/- infinity is disallowed for the histogram bounds (but allowed for the operand). Update docs and regression tests, bump the catversion.	19 years ago
Bruce Momjian	bb3cce4ec9	Add E'' syntax so eventually normal strings can treat backslashes literally. Add GUC variables: "escape_string_warning" - warn about backslashes in non-E strings "escape_string_syntax" - supports E'' syntax? "standard_compliant_strings" - treats backslashes literally in '' Update code to use E'' when escapes are used.	21 years ago
Tom Lane	319902dc8c	Fix to_number for the case of a trailing S. Karel Zak	21 years ago
Neil Conway	0079547bcb	Implement the width_bucket() function, per SQL2003. This commit only adds a variant of the function for the 'numeric' datatype; it would be possible to add additional variants for other datatypes, but I haven't done so yet. This commit includes regression tests and minimal documentation; if we want developers to actually use this function in applications, we'll probably need to document what it does more fully.	22 years ago
Neil Conway	fc7fd50182	Add ceiling() as an alias for ceil(), and power() as an alias for pow(). Regression tests and documentation have both been updated. SQL2003 requires that both ceiling() and ceil() be present, so I have documented both spellings. SQL2003 doesn't mention pow() as far as I can see, so I decided to replace pow() with power() in the documentation: there is little reason to encourage the continued usage of a function that isn't compliant with the standard, given a standard-compliant alternative. RELEASE NOTES: should state that pow() is considered deprecated (although I don't see the need to ever remove it.)	22 years ago
Neil Conway	e2ded829f6	Revise int2/int4/int8/float4/float8 input routines to allow for any amount of leading or trailing whitespace (where "whitespace" is defined by isspace()). This is for SQL conformance, as well as consistency with other numeric types (e.g. oid, numeric). Also refactor pg_atoi() to avoid looking at errno where not necessary, and add a bunch of regression tests for the input to these types.	22 years ago
Bruce Momjian	28fb1c196b	Update create_rule manual page.	26 years ago
Thomas G. Lockhart	6456810078	Implement column aliases on views "CREATE VIEW name (collist)". Implement TIME WITH TIME ZONE type (timetz internal type). Remap length() for character strings to CHAR_LENGTH() for SQL92 and to remove the ambiguity with geometric length() functions. Keep length() for character strings for backward compatibility. Shrink stored views by removing internal column name list from visible rte. Implement min(), max() for time and timetz data types. Implement conversion of TIME to INTERVAL. Implement abs(), mod(), fac() for the int8 data type. Rename some math functions to generic names: round(), sqrt(), cbrt(), pow(), etc. Rename NUMERIC power() function to pow(). Fix int2 factorial to calculate result in int4. Enhance the Oracle compatibility function translate() to work with string arguments (from Edwin Ramirez). Modify pg_proc system table to remove OID holes.	26 years ago
Bruce Momjian	eae5184d11	Hi, the to_char() source code is large, here are regression tests for numeric/timestamp/int8 part. It is probably enough test for formatting code in the formatting.c module. The others (float4/float8/int4) types share this formatting code and eventual bugs for these types aren't few probable. Patch fix timestamp_to_char() for infinity/invalid timestamp too. Karel	26 years ago
Tom Lane	b0b3187bb4	Add some examples to numeric regress test to verify that recently-fixed problems are indeed fixed.	26 years ago
Thomas G. Lockhart	4c4e68dccc	Clean up format of tests. Remove older "::" type coersion syntax in favor of extended SQL92 style. Include a few new tests for datetime/timespan arithmetic.	26 years ago
Jan Wieck	43499af4ab	New parallel regression test shell and related things. Jan	26 years ago
Jan Wieck	cc08d051d0	Added 2 regression tests for NUMERIC data type. 1. Using 100 digits after decimal point on the default make runtest. 2. Using 1000 digits after decimal point in a new target make bigtest. At the end of 'make runtest', a hint about the new bigtest is printed. Jan	27 years ago

20 Commits (ccf292cd2ec16c69ddfee3bf72afe113a7595e00)