org.apache.spark.sql.catalyst.analysis
A batch of rules.
A strategy that runs until fix point or maxIterations times, whichever comes first.
An execution strategy for rules that indicates the maximum number of executions.
Casts to/from BooleanType are transformed into comparisons since the JVM does not consider Booleans to be numeric types.
Changes Boolean values to Bytes so that expressions like true < false can be Evaluated.
Ensures that NullType gets casted to some other types under certain circumstances.
Makes sure all attributes have been resolved.
Converts string "NaN"s that are in binary operators with a NaN-able types (Float / Double) to the appropriate numeric equivalent.
This ensure that the types for various functions are as expected.
Turns projections that contain aggregate expressions into aggregations.
When a SELECT clause has only a single expression and that expression is a Generator we convert the Project to a Generate.
Makes attribute naming case insensitive by turning all UnresolvedAttributes to lowercase.
A strategy that only runs once.
Promotes strings that appear in arithmetic expressions.
Applies any changes to AttributeReference data types that are made by other rules to instances higher in the query tree.
Replaces UnresolvedFunctions with concrete Expressions.
Replaces UnresolvedAttributes with concrete AttributeReferences from a logical plan node's children.
Replaces UnresolvedRelations with concrete relations from the catalog.
Expands any references to Star (*) in project operators.
When encountering a cast from a string representing a valid fractional number to an integral
type the jvm will throw a java.lang.NumberFormatException.
Widens numeric types and converts strings to numbers when appropriate.
Executes the batches of rules defined by the subclass.
Executes the batches of rules defined by the subclass. The batches are executed serially using the defined execution strategy. Within each batch, rules are also executed serially.
Defines a sequence of rule batches, to be overridden by the implementation.
Defines a sequence of rule batches, to be overridden by the implementation.
Provides a logical query plan analyzer, which translates UnresolvedAttributes and UnresolvedRelations into fully typed objects using information in a schema Catalog and a FunctionRegistry.