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ompute.logical-plan.0.2.1.source-code.LogicalExpr.kt Maven / Gradle / Ivy

package org.ballistacompute.logical

import org.ballistacompute.datatypes.Field

/**
 * Logical Expression for use in logical query plans. The logical expression provides information needed
 * during the planning phase such as the name and data type of the expression.
 */
interface LogicalExpr {

    /**
     * Return meta-data about the value that will be produced by this expression when evaluated against
     * a particular input.
     */
    fun toField(input: LogicalPlan): Field
}