cloud-fan commented on code in PR #36066:
URL: https://github.com/apache/spark/pull/36066#discussion_r844021792
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/numberFormatExpressions.scala:
##########
@@ -22,48 +22,58 @@ import java.util.Locale
import org.apache.spark.sql.catalyst.analysis.TypeCheckResult
import org.apache.spark.sql.catalyst.expressions.codegen.{CodegenContext,
CodeGenerator, ExprCode}
import org.apache.spark.sql.catalyst.expressions.codegen.Block.BlockHelper
-import org.apache.spark.sql.catalyst.util.NumberFormatter
+import org.apache.spark.sql.catalyst.util.ToNumberParser
import org.apache.spark.sql.types.{DataType, StringType}
import org.apache.spark.unsafe.types.UTF8String
/**
- * A function that converts string to numeric.
+ * A function that converts strings to decimal values, returning an exception
if the input string
+ * fails to match the format string.
*/
@ExpressionDescription(
usage = """
- _FUNC_(strExpr, formatExpr) - Convert `strExpr` to a number based on the
`formatExpr`.
- The format can consist of the following characters:
- '0' or '9': digit position
- '.' or 'D': decimal point (only allowed once)
- ',' or 'G': group (thousands) separator
- '-' or 'S': sign anchored to number (only allowed once)
- '$': value with a leading dollar sign (only allowed once)
+ _FUNC_(expr, fmt) - Convert string 'expr' to a number based on the string
format 'fmt'.
+ Throws an exception if the conversion fails. The format can consist of
the following
+ characters, case insensitive:
+ '0' or '9': Specifies an expected digit between 0 and 9. A 0 to the
left of the decimal
+ point indicates that 'expr' must have at least as many digits. A
leading 9 indicates
+ that 'expr' may omit these digits. 'expr' must not be larger than
the number of digits
+ allowed to the left of the decimal point per the format string.
Digits in the format
+ string to the right of the decimal indicate the most digits 'expr'
may have to the right
+ of the decimal point.
+ '.' or 'D': Specifies the position of the decimal point (optional,
only allowed once).
+ ',' or 'G': Specifies the position of the grouping (thousands)
separator (,). There must be
+ a 0 or 9 to the left of the rightmost grouping separator. 'expr'
must match the
+ grouping separator relevant for the size of the number.
+ '$': Specifies the location of the $ currency sign. This character
may only be specified
Review Comment:
how about `L`?
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
