Commit5df20d4

Jan Wieck

authored and

Jan Wieck

committed

Little precision fix for POWER(). I discovered problems with big

exponents.Jan

1 parent0e9d75c commit5df20d4Copy full SHA for 5df20d4

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Lines changed: 4 additions & 4 deletions

Original file line number	Diff line number	Diff line change
`@@ -5,7 +5,7 @@`
`5`	`5`	`*`
`6`	`6`	`*1998 Jan Wieck`
`7`	`7`	`*`
`8`		`- * $Header: /cvsroot/pgsql/src/backend/utils/adt/numeric.c,v 1.1 1998/12/3019:56:29 wieck Exp $`
	`8`	`+ * $Header: /cvsroot/pgsql/src/backend/utils/adt/numeric.c,v 1.2 1998/12/3020:46:05 wieck Exp $`
`9`	`9`	`*`
`10`	`10`	`* ----------`
`11`	`11`	`*/`
`@@ -3371,9 +3371,9 @@ log_var(NumericVar base, NumericVar num, NumericVar *result)`
`3371`	`3371`
`3372`	`3372`
`3373`	`3373`	`/* ----------`
`3374`		`- *log_var() -`
	`3374`	`+ *power_var() -`
`3375`	`3375`	`*`
`3376`		`- *Computethelogarithm ofx in a given base`
	`3376`	`+ *Raise base tothepower ofexp`
`3377`	`3377`	`* ----------`
`3378`	`3378`	`*/`
`3379`	`3379`	`staticvoid`
`@@ -3384,7 +3384,7 @@ power_var(NumericVar base, NumericVar exp, NumericVar *result)`
`3384`	`3384`	`intsave_global_rscale;`
`3385`	`3385`
`3386`	`3386`	`save_global_rscale=global_rscale;`
`3387`		`-global_rscale+=8+MAX(0,exp->weight);`
	`3387`	`+global_rscale+=global_rscale /3+8;`
`3388`	`3388`
`3389`	`3389`	`init_var(&ln_base);`
`3390`	`3390`	`init_var(&ln_num);`

Lines changed: 2 additions & 2 deletions

Original file line number	Diff line number	Diff line change
`@@ -5,7 +5,7 @@`
`5`	`5`	`*`
`6`	`6`	`*1998 Jan Wieck`
`7`	`7`	`*`
`8`		`- * $Header: /cvsroot/pgsql/src/include/utils/numeric.h,v 1.1 1998/12/3019:56:35 wieck Exp $`
	`8`	`+ * $Header: /cvsroot/pgsql/src/include/utils/numeric.h,v 1.2 1998/12/3020:46:06 wieck Exp $`
`9`	`9`	`*`
`10`	`10`	`* ----------`
`11`	`11`	`*/`
`@@ -27,7 +27,7 @@`
`27`	`27`	`#defineNUMERIC_MAX_DISPLAY_SCALENUMERIC_MAX_PRECISION`
`28`	`28`	`#defineNUMERIC_MIN_DISPLAY_SCALENUMERIC_DEFAULT_SCALE + 4`
`29`	`29`
`30`		`-#defineNUMERIC_MAX_RESULT_SCALE(NUMERIC_MAX_PRECISION+ 4)`
	`30`	`+#defineNUMERIC_MAX_RESULT_SCALE(NUMERIC_MAX_PRECISION* 2)`
`31`	`31`	`#defineNUMERIC_MIN_RESULT_SCALE(NUMERIC_DEFAULT_PRECISION + 4)`
`32`	`32`
`33`	`33`	`#defineNUMERIC_UNPACKED_DATASIZE(NUMERIC_MAX_PRECISION * 2 + 4)`

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