JetEngine, Dynamic Functions - search min value only by non-empty meta-fields

search-min-by-non-empty.php

<?php

add_filter( 'jet-engine/dynamic-functions/final-query', function( $query, $function_data ) {

	$data_source = ! empty( $function_data['data_source'] ) ? $function_data['data_source'] : false;
	$source      = ! empty( $data_source['source'] ) ? $data_source['source'] : 'post_meta';
	$field_name  = ! empty( $data['field_name'] ) ? $data['field_name'] : false;

	if ( 'meta_value' === $source ) {
		$query = preg_replace( '/;$/', 'AND `meta_value` != \'\';', $query );
	}

	return $query;

}, 10, 2 );