Github user gvramana commented on a diff in the pull request:
https://github.com/apache/incubator-carbondata/pull/641#discussion_r106092997
--- Diff:
integration/spark2/src/main/scala/org/apache/spark/sql/parser/CarbonSpark2SqlParser.scala
---
@@ -129,4 +134,80 @@ class CarbonSpark2SqlParser extends CarbonDDLSqlParser
{
case databaseName ~ tableName ~ limit =>
ShowLoadsCommand(convertDbNameToLowerCase(databaseName),
tableName.toLowerCase(), limit)
}
+
+ protected lazy val alterTableModifyDataType: Parser[LogicalPlan] =
+ ALTER ~> TABLE ~> (ident <~ ".").? ~ ident ~ CHANGE ~ ident ~ ident ~
+ ident ~ opt("(" ~> rep1sep(valueOptions, ",") <~ ")") <~ opt(";") ^^ {
+ case dbName ~ table ~ change ~ columnName ~ columnNameCopy ~
dataType ~ values =>
+ // both the column names should be same
+ CommonUtil.validateColumnNames(columnName, columnNameCopy)
+ val alterTableChangeDataTypeModel =
+
AlterTableDataTypeChangeModel(parseDataType(dataType.toLowerCase, values),
+ convertDbNameToLowerCase(dbName),
+ table.toLowerCase,
+ columnName.toLowerCase,
+ columnNameCopy.toLowerCase)
+ AlterTableDataTypeChange(alterTableChangeDataTypeModel)
+ }
+
+ protected lazy val alterTableAddColumns: Parser[LogicalPlan] =
+ ALTER ~> TABLE ~> (ident <~ ".").? ~ ident ~
+ (ADD ~> COLUMNS ~> "(" ~> repsep(anyFieldDef, ",") <~ ")") ~
+ (TBLPROPERTIES ~> "(" ~> repsep(loadOptions, ",") <~ ")").? <~
opt(";") ^^ {
+ case dbName ~ table ~ fields ~ tblProp =>
+ fields.foreach{ f =>
+ if (isComplexDimDictionaryExclude(f.dataType.get)) {
+ throw new MalformedCarbonCommandException(
+ s"Add column is unsupported for complex datatype column:
${f.column}")
+ }
+ }
+ val tableProps = if (tblProp.isDefined) {
+ // default value should not be converted to lower case
+ val tblProps = tblProp.get.map(f => if
(f._1.toLowerCase.startsWith("default.value.")) {
+ f._1 -> f._2
+ } else {
+ f._1 -> f._2.toLowerCase
+ })
+ scala.collection.mutable.Map(tblProps: _*)
+ } else {
+ scala.collection.mutable.Map.empty[String, String]
+ }
+
+ val tableModel = prepareTableModel (false,
+ convertDbNameToLowerCase(dbName),
+ table.toLowerCase,
+ fields.map(convertFieldNamesToLowercase),
+ Seq.empty,
+ tableProps,
+ None,
+ true)
+
+ val alterTableAddColumnsModel =
AlterTableAddColumnsModel(convertDbNameToLowerCase(dbName),
+ table,
+ tableProps,
+ tableModel.dimCols,
+ tableModel.msrCols,
+ tableModel.highcardinalitydims.getOrElse(Seq.empty))
+ AlterTableAddColumns(alterTableAddColumnsModel)
+ }
+
+ private def convertFieldNamesToLowercase(field: Field): Field = {
+ val name = field.column.toLowerCase
+ field.copy(column = name, name = Some(name))
+ }
+ protected lazy val alterTableDropColumn: Parser[LogicalPlan] =
--- End diff --
Add rule name columnlist, which can check duplicates and related validation
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