cloud-fan commented on a change in pull request #35060:
URL: https://github.com/apache/spark/pull/35060#discussion_r783639634
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/NumberUtils.scala
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@@ -18,52 +18,76 @@
package org.apache.spark.sql.catalyst.util
import java.math.BigDecimal
-import java.text.{DecimalFormat, NumberFormat, ParsePosition}
+import java.text.{DecimalFormat, ParsePosition}
import java.util.Locale
+import org.apache.spark.sql.AnalysisException
+import org.apache.spark.sql.catalyst.analysis.TypeCheckResult
import org.apache.spark.sql.errors.{QueryCompilationErrors,
QueryExecutionErrors}
import org.apache.spark.sql.types.Decimal
import org.apache.spark.unsafe.types.UTF8String
object NumberUtils {
- private val pointSign = '.'
- private val letterPointSign = 'D'
- private val commaSign = ','
- private val letterCommaSign = 'G'
- private val minusSign = '-'
- private val letterMinusSign = 'S'
- private val dollarSign = '$'
+ private final val POINT_SIGN = '.'
+ private final val POINT_LETTER = 'D'
+ private final val COMMA_SIGN = ','
+ private final val COMMA_LETTER = 'G'
+ private final val MINUS_SIGN = '-'
+ private final val MINUS_LETTER = 'S'
+ private final val DOLLAR_SIGN = '$'
+ private final val NINE_DIGIT = '9'
+ private final val ZERO_DIGIT = '0'
+ private final val POUND_SIGN = '#'
- private val commaSignStr = commaSign.toString
+ private final val COMMA_SIGN_STRING = COMMA_SIGN.toString
+ private final val POUND_SIGN_STRING = POUND_SIGN.toString
+ private final val SIGN_SET = Set(POINT_SIGN, COMMA_SIGN, MINUS_SIGN,
DOLLAR_SIGN)
+
+ /**
+ * DecimalFormat provides '#' and '0' as placeholder of digit, ',' as
grouping separator,
+ * '.' as decimal separator, '-' as minus, '$' as dollar, but not '9', 'G',
'D', 'S'. So we need
+ * replace them show below:
+ * 1. '9' -> '#'
+ * 2. 'G' -> ','
+ * 3. 'D' -> '.'
+ * 4. 'S' -> '-'
+ *
+ * Note: When calling format, we must preserve the digits after decimal
point, so the digits
+ * after decimal point should be replaced as '0'. For example: '999.9' will
be normalized as
+ * '###.0' and '999.99' will be normalized as '###.00', so if the input is
454, the format
+ * output will be 454.0 and 454.00 respectively.
+ *
+ * @param format number format string
+ * @return normalized number format string
+ */
private def normalize(format: String): String = {
- var notFindDecimalPoint = true
+ var flag = true
Review comment:
this name is too vague. the previous name is better.
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