= null ) { global $wpdb; // Have to have at least one. if ( ! isset( $hour ) && ! isset( $minute ) && ! isset( $second ) ) { return false; } // Complex combined queries aren't supported for multi-value queries. if ( in_array( $compare, array( 'IN', 'NOT IN', 'BETWEEN', 'NOT BETWEEN' ), true ) ) { $return = array(); $value = $this->build_value( $compare, $hour ); if ( false !== $value ) { $return[] = "HOUR( $column ) $compare $value"; } $value = $this->build_value( $compare, $minute ); if ( false !== $value ) { $return[] = "MINUTE( $column ) $compare $value"; } $value = $this->build_value( $compare, $second ); if ( false !== $value ) { $return[] = "SECOND( $column ) $compare $value"; } return implode( ' AND ', $return ); } // Cases where just one unit is set. if ( isset( $hour ) && ! isset( $minute ) && ! isset( $second ) ) { $value = $this->build_value( $compare, $hour ); if ( false !== $value ) { return "HOUR( $column ) $compare $value"; } } elseif ( ! isset( $hour ) && isset( $minute ) && ! isset( $second ) ) { $value = $this->build_value( $compare, $minute ); if ( false !== $value ) { return "MINUTE( $column ) $compare $value"; } } elseif ( ! isset( $hour ) && ! isset( $minute ) && isset( $second ) ) { $value = $this->build_value( $compare, $second ); if ( false !== $value ) { return "SECOND( $column ) $compare $value"; } } // Single units were already handled. Since hour & second isn't allowed, minute must to be set. if ( ! isset( $minute ) ) { return false; } $format = ''; $time = ''; // Hour. if ( null !== $hour ) { $format .= '%H.'; $time .= sprintf( '%02d', $hour ) . '.'; } else { $format .= '0.'; $time .= '0.'; } // Minute. $format .= '%i'; $time .= sprintf( '%02d', $minute ); if ( isset( $second ) ) { $format .= '%s'; $time .= sprintf( '%02d', $second ); } return $wpdb->prepare( "DATE_FORMAT( $column, %s ) $compare %f", $format, $time ); } }