walterddr commented on code in PR #10814:
URL: https://github.com/apache/pinot/pull/10814#discussion_r1228464036
##########
pinot-query-planner/src/main/java/org/apache/pinot/query/planner/logical/RelToPlanNodeConverter.java:
##########
@@ -209,8 +209,8 @@ public static DataSchema.ColumnDataType
convertToColumnDataType(RelDataType relD
case DECIMAL:
return resolveDecimal(relDataType);
case FLOAT:
- return isArray ? DataSchema.ColumnDataType.FLOAT_ARRAY :
DataSchema.ColumnDataType.FLOAT;
case REAL:
+ return isArray ? DataSchema.ColumnDataType.FLOAT_ARRAY :
DataSchema.ColumnDataType.FLOAT;
Review Comment:
let's add a comment --> this is where we convert from Calcite's REAL data
type to Pinot's FLOAT data type
##########
pinot-query-planner/src/main/java/org/apache/pinot/query/type/TypeFactory.java:
##########
@@ -60,8 +60,8 @@ private RelDataType toRelDataType(FieldSpec fieldSpec) {
return fieldSpec.isSingleValueField() ?
createSqlType(SqlTypeName.BIGINT)
: createArrayType(createSqlType(SqlTypeName.BIGINT), -1);
case FLOAT:
- return fieldSpec.isSingleValueField() ?
createSqlType(SqlTypeName.FLOAT)
- : createArrayType(createSqlType(SqlTypeName.FLOAT), -1);
+ return fieldSpec.isSingleValueField() ? createSqlType(SqlTypeName.REAL)
+ : createArrayType(createSqlType(SqlTypeName.REAL), -1);
Review Comment:
add comments: this is where we convert the Pinot's FLOAT data type to
Calcite's REAL data type, b/c calcite's FLOAT is actually "DOUBLE", we have to
make sure calcite understands the precision/scale configuration of Pinot's
FLOAT is actually Calcite's REAL.
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