@java.lang.Override
          public CustomRankingInfo parsePartialFrom(
              com.google.protobuf.CodedInputStream input,
              com.google.protobuf.ExtensionRegistryLite extensionRegistry)
              throws com.google.protobuf.InvalidProtocolBufferException {
            Builder builder = newBuilder();
            try {
              builder.mergeFrom(input, extensionRegistry);
            } catch (com.google.protobuf.InvalidProtocolBufferException e) {
              throw e.setUnfinishedMessage(builder.buildPartial());
            } catch (com.google.protobuf.UninitializedMessageException e) {
              throw e.asInvalidProtocolBufferException()
                  .setUnfinishedMessage(builder.buildPartial());
            } catch (java.io.IOException e) {
              throw new com.google.protobuf.InvalidProtocolBufferException(e)
                  .setUnfinishedMessage(builder.buildPartial());
            }
            return builder.buildPartial();
          }
<pre>
Required. Controls over how job documents get ranked on top of existing
relevance score (determined by API algorithm). A combination of the
ranking expression and relevance score is used to determine job's final
ranking position.

The syntax for this expression is a subset of Google SQL syntax.

Supported operators are: +, -, *, /, where the left and right side of
the operator is either a numeric
[Job.custom_attributes][google.cloud.talent.v4.Job.custom_attributes]
key, integer/double value or an expression that can be evaluated to a
number.

Parenthesis are supported to adjust calculation precedence. The
expression must be &lt; 200 characters in length.

The expression is considered invalid for a job if the expression
references custom attributes that are not populated on the job or if the
expression results in a divide by zero. If an expression is invalid for a
job, that job is demoted to the end of the results.

Sample ranking expression
(year + 25) * 0.25 - (freshness / 0.5)
</pre>

<code>string ranking_expression = 2 [(.google.api.field_behavior) = REQUIRED];</code>

@param value The bytes for rankingExpression to set.
@return This builder for chaining.
java-talent/proto-google-cloud-talent-v4/src/main/java/com/google/cloud/talent/v4/SearchJobsRequest.java