Where in the sqlContext.implicits._
does it define the $"string" to represent a dataframe call to the parent dataframe's column? Specifically I was confused on seeing something like the following:
import sqlContext.implicits._
df.where($"type".isin("type1","type2") and $"status".isin("completed","inprogress"))
If you see the following link
class SQLContext.implicits$.StringToColumn
Converts $"col name" into an Column.
Here is the link for latest version.
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